Prelab for Calibration of Volumetric Glassware Essay Example for Free

Prelab for Calibration of Volumetric Glassware Essay1). Weigh a 50 mL Erlenmeyer flask. pip sure the glassware is clean and free of any cracks or stars. Also, take note of the temperature of water system, as volume varies with temperature 2). Transfer a portion of the water to flask with a pipette and record the mass of flask with the water. Use this selective information to calculate how much water was transferred from the pipette to the flask. 3). Repeat step twain 4 times, ensuring the remaining results are similar to the first trial. Use this data to calculate the mean amount of water transferred and the standard deviation between the data points. Calibration of a 50 mL Buret1). Fill the burettete with 50 mL of the temperature-equilibrated water. Be as precise as possible in ball club to bring forth reliable data. If the volume changes over a period of a few minutes, obtain a new buret. Be sure to obtain the temperature of the water as well. 2). Weigh a 125 mL Erlenmeye r flask with its stopper. Again, dissemble sure the flask is sanitary and has no cracks or stars. 3). At a rate of 20 mL/min, open the buret stopper and allow 10.00 mL of water to submerge into the flask. Remember to seal off the flask as soon as the water stops in order to minimize evaporation. 4). Using the technique of reading meniscuss, record the volume reading for the buret to the hundreds place. The last significant digit may be an approximation.5). Weigh of the stopped Erlenmeyer flask with the water on a scale. Determine the quantity of water transferred from the buret by finding the mass difference from the flask with no water vs. the new weight. 6). Repeat the steps from three to five four more times for the remaining volume of the buret and repeat the whole procedure again with a new 50 mL volume. Remember to record all data. Also, make sure to repeat data that is not duplicated correctly to ensure accurate and precise results. 7). Use the field of study data from tabl e one in order to find the true volume of water transferred based on the temperature. Create tables of the recorded data as well as a plot of the correction data with the apparent volume with labeled axis. Perform Calculations 8). Dispose of all glassware and materials accordingly and clean up the lab area. HazardsNo harmful chemicals ordain be dealt with in this lab. The only safety hazard is to be cautious of broken or chipped glassware that may cut ones skin. Make sure to report any mutilated glassware to TA and accidents in the lab must be handled properly.

Organizations Essay Example for Free

Organizations EssayAn memorial tablet can be defined as a group of persons or individuals that unite to discharge a common task. Each individual within an organization usually has a relatively well-defined cable description, so that the group is organized in a way that will ensure that all tasks necessary for the completion of the goal will be covered. Organizational behavior involves applying the behavioral theory of how persons get along within groups to the practice of working within organizations. It is the practical application of research done in such disciplines as psychology. The approach taken in organizational behavior is known as systems through which relationships are probed and defined according to the level of organization and the types of individuals that make them up. The human side of organization is directly tie in to organizational behavior, as it acknowledges the factors such as personality and behavior that may arrange different types of managerial str ategies to be employed. The personality of the manager may cause him or her to display a certain type of loss leadership style, while the personalities of employees may make it necessary for the manager to display a different style.Because an organization is made up of humans, it is practically impossible to separate it from the behaviors that are common to humans. Work is an important part of human life. Because people spend so overmuch energy preparing and educating themselves for the jobs they perform, work tends to define the individual. Also, a large portion of any persons day is spent doing the work from which they derive monetary and different resources. Therefore, work is more than just a means of earning money.It is also a method of channeling ones creativity and can be the area in which one offers a unique gift to mankind. I, for example, take inventory for a copier company and I enjoy it because it allows the staff of the company to remain organized. My job is also nec essary as it allows the managers and owners to have tangible evidence of the companys health by gauging the speed at which the stock leaves the shelves and goes into the hands of consumers. Finally, it is a fulfilling job because I am able to make sure that customers are satisfied when all the goods they need are there on the shelves.Referencehttp//www.nwlink.com/donclark/leader/leadob.html

Dystopia In Film | Metropolis Vs Utopian Art Deco

Dys pointia In Film Metropolis Vs Utopian craft DecoThe 1920s in Germ each were a transition clock, World War I had recently ended, and it was precisely the war that showed the destructive potential of modern engine room. Invented and first employ by the Germans in 1915, implement guns and poison gas showed the deep split between technology and earthly concern, it was the first modern war in which machines decided the outcome. In this epoch in history, it was the embracement of technology in other parts of the world, the graphics Deco movement was the Utopian untried modal value of living. After the war in Germany, Ameri buttocks modernity became a regent(postnominal) agent in the economic and cultural modernisation. the States re endueed the New World, since Germany had a deficiency of national identity, the predilection that mass culture might be a secret Ameri can buoy weapon, single that would enslave the world by distracting it grant disposition gibe to Isenberg (2009, p.182-183). Combining these two facts, the German loss of gravitas during the first World War, and modernity rising, it created a certain comfort for the German culture to accept the modern movement, since it represented the imaginationl of living in the present which made it easier to forget about the harsh past. At first America was noticen as a good idea, but by the mid-1920s Germany faced a perceptual constancy in politics and economy, which questi adeptd American way of living, its technological progress began to be seen as inhuman. Germany was beginning to feel threatened by America, with its focus on physicalism and mechanisation of b state and butter, seeing it as a way to kill the human side of humankind.In 1927, the German photo director Fritz Lang, created a photographic film analysing precisely that, our future with machines and its possible outcome. It was a film created to show the comfort Germany first took in accepting modernity but in a way where hu manity would lose it alone to it. The artistry Deco movement at the time, stood for the modern world and the evolution of raft by the impertinently inventions of machines. Metropolis, still believed in this Utopian life but created its own, showing how human and machines can work as long as one in-chief(postnominal) factor is not forgotten, which the modern world seemed to have got already done.In comparison to the Art Deco modern views, Metropolis created its own view, which can be seen as its own nave Utopian world, but overly showed the Dystopia that could occur from this fast modern movement.In order to see how the two go hand in hand, one moldiness look at most-valuable fixingss which happened at this time, the introduction of new technologies which affected almost whole the aspects of life. From architecture to fashion, people and their ways were changing, since freedom was now praised upon, ein truththing that utilise to be taboo or conservative was now in the as sailable. Taking into consideration that the major elements, which make up Art Deco, ar present in the film this is to show how they were used to portray the negative side of this modern vision. We all believe in a Utopian way of life, in accurateion, but the consequences are most of the time overlooked, and the film Metropolis was that vision, showing the effects of the new technologies people were praising and how it would for incessantly change people, life and the world. Without further ado, lets see how the film has proven itself to be a masterpiece but most importantly how a purely imaginative vision may have foretold our future, from began as a Utopian idea to what may have changed the fundamentals of humankind.The late teens and early twenties in Germany was a time of rampant inflation, decadence, personal liberty, violence and insecurity. It was followed by the unfortunate intensify of the Nazis during the late twenties and early thirties, which saw a severe clampdown o n freedom of ex barrackion is all walks of life, especially the arts and politics fit in to electric organ (2009). The central theme of Metropolis is that of a separation between working class and higher(prenominal)-ups and the need for a mutual understanding of each is presented both abstractly and directly through the image rather than the word. This theme of proles riseing against domination by exploitative management, their soulless machines, and new technologies, also laid low(p) a fit in with reviewers and the general public, though many critics in America and Britain objected strongly to this anti-Fordism / anti production-line tale. As such, Metropolis, with its many themes and sub-texts, including the almost obligatory boy meets miss, boy looses girl, boy finds girl was a controversial film from day one It garnered both positive and negative comment wherever it was shown, and generated frequently critical discussion in the press upon release tally to Organ (2009). In order to understand the importance of the visual work accomplished in the film, on must look at different scenes from the movie where this is proven, such as the opening shot of line upon line, file upon file, of workers marching down the hallway towards the elevator that shines them down into the depths of the citys machines and inner workings. separately worker wears the same uniform, shuffles their feet in the same manner as if they were a military unit, and each slouch and hold their heads down in unison agree to Simon M (2010). Such images as workers being fed to a giant monster, masses upon masses of slave labor building the biblical Tower of Babel, and termination itself swinging its scythe indicate the possible fall of this turbulent society in a stark and shocking way not possible through ordinary images or til now the written word. They give this story something of a mythic and fantastic property, portraying its subject matter through symbolism rather than realism , hyperbole rather than realism match to Simon M (2010). The pleasure garden in which Freder (the main character) indulges in the most hedonistic of pleasures, providing a stark contrast with the metallic, blue world of the workers. This fluid and happy-go-lucky world is immediately interrupted by the entrance of Maria and the worker children. Here is the direct conflict and contrast between workers and elites, high and low, heaven and hell. Later on in the film Freder witnesses one of these machines at work, each worker mechanically pushing buttons and pulling levers in uniform, fixed motions. It is as if these workers are themselves machines, as Lang uses the image of uniform, unnatural motion to represent a lack of humanity, hopefully inspiring repulsion in the audience according to Simon M (2010). Such exaggeration is arguably necessary in the case of a silent film in order to make up for the lack of proper dialogue, but it also may add to the raw symbolism of it all, going to e actually last length to show the divide between worker and elite. This exaggeration practically defines Metropolis in many instances. Along with the aforementioned portrayals of Freder and Maria, there is the near-comically evil Rotwang, who inspired just about every mad scientist represent in popular culture since then according to Simon M (2010). Another important factor is the characteristics of the appearance and behaviour of Rotwang which does not fit the stereotype of a modern scientist, and there are indications that he may be in league with the devil. The personality of the scientist Rotwang belongs to one of the most interesting antagonists of the screen. The possibility of an ambivalent recitation of his character, he is a scientist, but also something of a sorcerer allied with satanic forces, which gives him greater complexity according to Urgoskov (2009).In 1924, Fritz Lang visited New York City, where the big-city architecture struck him, and the luminous citysca pe influenced the visual design and electrifying energy for the film. Originally an architect, Lang was a man of unusually sensitive visual perceptions. His films of those years show an expressionistic sense for the plastic and the lighting, which emphasized architectonic lines and conveyed a sense of geometric construction that not solo extends to the hangs and the depicted milieu but even influenced the positioning of the actors in individual shots. In keeping with the conventions of expressionism, the inhabitants of the subterranean city have no individuality, and the crowd represents a compact mass from which personality projects that as a stark exception and only in a definite rhythm according to Urgoskov (2009).The introductory sequences present this social organization in a very attractive light. In a magnificent, gigantic city with gleaming skyscrapers, suspension bridges, and bustling street, people plump in comfort and plenty, with every possibility for skilful and p hysical development. However, Metropolis is not a city of freedom and equality. Below grung, working for the chosen elite, are masses of nameless workers who have no more value within the social order than a cog in a machine or a tool or production. It is for this reason that the workers revolt and almost destroy the city only then is there a reconciliation and an equalization of rights for the two strata, the elite and the workers. Lang honestly believed in this idea of reconciliation, and his mental attitude to a certain extent reflected the German reality, in which there were growing indications of stabilization and attempts to resolve social problems. The uneven lines, contrasts of light and dark, half-shadows and silhouettes, which serve to suggest sibylline and menacing actions, events, and emotions. Lang applied these techniques effectively and successfully to one of the varieties of the fantasy genre, what he created to be utopian work, or in modern words influenced the genre of erudition Fiction according to Urgoskov (2009).What can also be factored is the importance of architecture in the Art Deco movement, where the advanced of technology was introduced, which made the construction of skyscrapers possible. This new way of building up rather than out, gave the illusion that we could reach the sky, giving a high expectation for our future. In the film Metropolis, the main building is the Babel tower, where the legend is told that it was made to reach the stars and on the top it would be written Great is the world and its Creator And great is Man but in the sequence of the film where this is explained, it shows how in order for a building or any structure to be built, one must first envisage of the idea, which is not ceaselessly possible. Once the idea is put on paper or into small scale, it needs labour to be produced and this is when the hands come in, and it is shown that in order for the Babel tower to be built, it would take a lot of man po wer and therefore some blood would have to be shed in order for the man who had thought of this building, could see it built. This is Metropoliss view on the built of skyscrapers, since they were using new techniques, which were not already perfected, and what it would take to build such things, the cost of human lives? That it is great for such ideas to ever be thought up, but is it necessary? At the time yes, since it showed the greatness of man and what he could achieve.When a director creates a film, its main purpose it to fall a subject through visuals and dialogue, which can be expressed in different ways, such as speech, facial expressions and written words. Its main focus is to make the audience feel exactly what the director has in mind, therefore when Fritz Lang created this film, these elements could not be forgotten or not be taken seriously, or else the film would have not gotten so much attention or gained so much success. In a way if unprofessional work had been don e, we would not even talk about this movie today, but the push for a different genre in film and the motivation to build a realistic set and using the right lighting, made this film not only a work or art but a movie that will await to affect people in generations to come.InteriorsHow does one judge anothers financial status? by the furniture and interior of their home, it is not always true, but when exposed to individual elses lifestyle and home, one can easily put a social status on the other. In Metropolis, the interiors of both the upper and lower worlds are very distinct. The upper shows a high usage of Art Deco elements and the lower is very cold and style-less. The Art Deco elements showed the high class, therefore representing the people who could afford such extravaganzas. The Utopian concept is very much present, from using such interiors, which were very popular with the American style of the time, showing how the exploiters can manage to hide the bad and only show th e good, or in other words the output. As seen in the office of Joh Fredersen and in Freders bedroom, all the highest technology was available for their usage. From the bed shape to the lamps, as well as the desk, all the geometric elements can be seen. This was done to show how the upper class were able to live, compared to the lower class, which lived under ground, with not much to rely too, since their living space was limited to brick walls and constant work, were the luxurious Art Deco furniture would serve no purpose to them, since they did not have the time to rate it.All these elements were to show, the Utopian life lived by the people who ran the city, compared to the Dystopia it created by asking such a request from other human beings, it analyses the two heads of society and how people live. Based on the concept of capitalism and materialism, where it can only be reached by the officers and not the workers, which tends to be a common theme in any point in history. The ma in point of using such distinct style or interiors and exteriors, was to show the freedom and lack of appreciation from the upper class, since they had everything, they forgot to think about what it took to give them this luxury. It is an important factor in the film, since the whole point is to show, how and why workers would revolt against their superiors, and reservation such a big contrast between the quality of life between the two made the impact of the workers revolt more powerful, since it showed what they were deprived from and how it affected them. Running a city and taking all the profits can only generate unfairness, therefore creating a created desire of un call for things to people who do not pocess them. If the interior design had not been considered for this movie the different views of both classes would have not been so powerful, and taking into consideration that the film depended a lot on visual and not words, such things needed to be accentuated to create its full point, to be clear to the viewer, what people were being targeted and illustrated.For her all 7 deadly sinsMany biblical references can be seen in this film, one of the most important element in Metropolis is the robot version of Maria, which carries on her all 7 deadly sins. This image of the woman can be interpreted on many levels, one can be to show how women were acting in the 1920s since it was a time where more open behaviours were accepted, their dresses got shorter, they started to smoke and drink in public and freely exposed their sexuality, a way for them to celebrate the modern woman. The emergence of emancipated and sexually liberated women, as well as organised feminist activities in the mid-1920s. The robot Maria, stylised as the New Woman, rips the social fabric asunder, inciting the workers to rebel and seducing them into self-destructive acts. Her punishment, once she is reveal as an agent provocateur, is to be burned at the stake according to Isenberg (2009, p.181). The most important scene is when the robotic doppelgnger of Maria , with her twitchy eye, sexually dances in front of the upper class men, this behaviour was meant to distract and manipulate them, done in an exaggerated way, when all the mens eyes are seen, their mouths are open, they become more violent to the point where they all run to the podium on which she dances, she tricks them to be a temptress who is out to deceive those who fall for the illusion of a replica. This nexus of technology, visual pleasure, and fantasy also lay at the core of modern American mass culture, which, according to some cultural critics, had seduced Germany into renouncing its classical canon of high culture according to Isenberg (2009, p.181). This robotic Maria was meant as metaphors, one being the threat the modern woman would have on men and community with her new sexual manipulating techniques, second she represents America and how it first seduced Germany into mass culture, through the s ame kind of pleasurable ways. The delicate beauty which Lang made the robot, with its glittering female body, stylised breasts and inhuman mask preferably of a face perfectly represents this theory, it was made on purpose to be sexual, since it needed to represent the power of womans new sexual behaviour and how it could impact communities. She is hard-boiled as being a witch when she is discovered to be an imposter, which again shows how this new act is unnatural and dangerous to the evolution of people and if practiced a woman is as good as dead and should be burned alive for her sins of manipulation. The beauty of woman was openly recognised, therefore women seemed to take advantage of this new attention they were getting and getting away with it, showing how soon women could have the same rights as men, since they could manipulate them, showing an unbalance to how people use to live and statuses between men and women were already established.Visual Communication typography and movie posterArt Deco typefaces are composed of geometric forms, an influence from the geometrical chunk language of the Constructivists, but the love for elegance at the time gave it a decorative touch. With this new style of type design, readability sometimes wasnt too clear, since the letter seemed flat and ornamental, where they received additional spacial and graphic embellishments. One characteristic change was type going from narrow to wide, sometimes the lower cases were completely treat to embrace the thin, long stroked capital letters, but antique and fractured scripts remain the standard despite the eras prevailing tastes. At times they were the mouthpiece of twenties modernism, with its technology, communication, transportation and its vigor at other times, of mundane elegance and luxury transposed into a fantastical world of unadulterated glamour that takes precedence over typography according to Stawinski (2009, p.131). This became a graphic language of exotic cu ltures, which embodied themes of modern technology and ways of life. One distinct font of the Art Deco movement, is Broadway designed by Morris sperm-filled Benton in 1925 (show type)Comparing it to the font used for the Metropolis title, one can see where the Art Deco elements of type are visible but how they have been altered to create the feel for the movie. This obvious alteration, created a sort of horror feel, but how? The descenders of the M, T, R, P and S have elongated, the bowls of the O have been evenly distributed, the I, L and E have been distorted, an also distorted dot has been added to the I, but all the most important factor is that each letter finishes with a point as can be seen in all the descenders and the arm of the T. These strong angles, visible in all the letters, even on the O since it not perfectly round but mostly choppy lines formed into a circle, have given this title its unique character, where it is only composed of angles, no smooth lines are prese nt, respecting the geometric language of the time but going against elegance.Taking into consideration that Fritz Langs 1927 film Metropolis is a silent film, the written word used in intertitles contend a large role in story comprehension. Intertitles are important in silent films, since they need to give the audience info through text, which should be both appealing and readable, to clearly express to the audience what is being visually shown. Metropolis would be particularly hard to understand without the on-screen narration, since the actors faces and movements can express only so much. The font chosen for the Metropolis intertitles is very artistically stylized, which goes against the futuristic city storyline, where a more straight-lined font may have been more appropriate. still though Metropolis inspired the Science Fiction film style, it was not meant to be one, but rather an art film, therefore it makes sense to use artistic intertitles, as a way to make the movie balan ced in the style it was creating. Throughout the films city the same stylised font it used as well as numbers, which indicate the style used throughout Metropolis, which shows that typography played a big part in the films mood, is was careful position and used to make sure all the information needed was clear and stylised accordingly.All these traits put together have created an abstract version of typical Art Deco font, but on purpose, in order to catch someones attention, one must stimulate that sense, the way to promote the art form of film was through making a poster for it, what better way to give it an identity and a feel. When a poster is designed, it is composed of information for its viewer, which is also targeted, to inform them of what is happening, this information is read through the usage of words, which is where typography comes in. This powerful tool of type design, is the cherry on top of a poster design, since it is also composed if imagery to set forth another kind of feel, but type when used correctly can automatically create the ambience to describe the art form as a whole. In the case of Metropolis, this alteration of type was used just for that purpose, to trigger the imagination of its viewer, to show something different then the typical Art Deco posters created at the time of its production. Since the films theme was also an alteration of the life views of the time, if a typical Art Deco font had been used, it would have not shown the effect the film as a whole was trying to reach.So going back to 1927, as someone is walking in the streets and sees the Metropolis poster advertising the film on a wall, one can imagine the attention it must have gotten, since everything else around was produced to support positivity and evolution, here comes something scary and negative, therefore triggering the curiosity of people to see why it was so different. In order for a poster or any other sort of advertising elements to be successful, they ne ed to properly represent what it is symbolising, which the one of a kind font used for the title of Metropolis did, it was the introduction to the movie before someone went to the theatre to see.Going to the next visual element, posters are a very powerful advertising tool, since they can be placed literally anywhere, therefore making them reachable to any eyes and to any audience. Typography as said before is one of the most important elements of a poster, since it makes the audience aware of what the poster is about, since it will surely cary a title. The other element is imagery, which is usually the background, and is used to go along with the title, to create a unified theme and helps the viewer reach a conclusion of their own to what the poster may mean. Posters are an art, since they need to work in a way where they need to be noticed at first glance, and briefly inform the viewer with all the important information in a couple of minutes. For such a film as Metropolis, which is in fact a two hour view of mournful images, the poster had to illustrate all of that into one image, basically giving away the whole movie in a single view.Typical Art Deco posters were colourful, vibrant, energetic, showed a lot of movement, basically they illustrated and embraced the new technologies being introduced. They were drawn and printing with the latest techniques invented, showing people living in this new modernity, such as travel, fashion, drinking and smoking. What used to be taboo, was now in the open and people were showing off this new lifestyle full of luxury and advancement, which had never been seen before. This perfect lifestyle, mostly only affordable by the higher class, was praised upon, everyone had to be part of this new movement, exposing their inner desires, or letting all hell break lose. This new freedom of expression, and new possibilities had to be reflected, mostly through abstract views, such as people were usually drawn through geometric form s, almost not real, like this movement was too good to be true, in a way it showed the fear of people, since it used fantasy images to show what was really going on, things were moving too fast and the population did not really have time to digest all of this, therefore showing people though geometric elements, was a easier way to accept it.The imagery of the Metropolis poster distributed at the time, was duotone, illustrating only buildings in the background and the robot in the foreground, the title of the film at the top and all the information at the bottom. The duotone, was against all the colourful posters at the time, since the movie was showing the dark side of the Utopian philosophy of Art Deco, the robot in the middle represented the most important part of the film, but also to show people how they would evolve, but the answer to how lied in watching the movie. The information at the bottom, gave the regular film info who directed it, the main actors, music composer, produ ction house and writer. The drawing of the robot used a lot of curving lines, and showed an emotionless face, making it obvious that humans were being interpreted as robots.ConclusionLets start with the quote The mediator between head and hands must be the heart taken from the film Metropolis, from this analysis it can be said that Art Deco is the head and the hands and Metropolis is the heart. The Utopian idea of Art Deco was a way to celebrate the new world and its technologies whereas Metropolis was the Dystopian view hidden behind this philosophy. It can be seen through all the elements stated, as a warning or a reality to what the world may evolve to be, that without the heart a life cannot function, but without the head and the hands a world cannot evolve. Therefore they both go hand in hand, but never one without the other, that humans may never forget their real values. This is the message that the film portrayed, that there is beauty in evolving, but we must never forget w ho we really are and our true powers, that if we rely too much on machines (technology) then what is left of us? Art Deco, was a time when everything was changing, the excitement of a new life, the embracing of a freedom given to people by machines doing jobs for them. These two art forms, have proven themselves through history and have shaped the world we now live in, but without art, how could anyone in the future admit how a community evolved or lived, this is why it is important to analyse all the details of one element and how it fits into the time period it was produced, to better understand its message and value.The nave way people were living during the 1920s, was in a way beautiful and pure, they had no worries except live and explore their new identities, Metropolis showed the dissimilitude between the high class or in other words the heads versus the lower class, the hands, and how they would live in two different worlds, one above and one below. This shows, that once a n idea is conceived, the inventor takes all the credit, whereas the hands who built it, are never recognised for the hard work and risks it took to construct it. People in the higher class would be the only one to appreciate the hands work, since they would be the only ones would could afford it, they would be the only ones who could have the luxury to live in such buildings reaching the stars and afford such extravaganzas in their homes. But where did the workers fit in, in all of this? This is what Metropolis, was showing, that for such a Utopia to exist fairness should be placed between the heads who conceive ideas and the hands who built them, and yes in order to do that, the only power is our hearts. When speaking about art, the philosophy behind it must always be talked about, since it explains why it was created and what it was meant to represent, without one, you cant have the other, which is also another strong point about the quote, since people tend to concentrate on the most important facts but forgetting how it became important.Metropolis also created its own Utopia, where as long as the heart is present and the human side in humankind is never lost, we can live in an harmonious world. The hand shake in the end, also could represent the labour giving in again to capital. Metropolis inaugurated a serial publication of utopias on film that attempted to resolve the difficulties of the contemporary state of society by projecting them into a story with a futuristic setting according to Urgoskov (2009).

Differences between the characteristics of a soft real time task

Differences between the characteristics of a muted satisfying clock time taskQues 1-Explain the key differences between the characteristics of a loony real time task such as web browsing and a non real time task such as e-mail delivery?autonomic nervous administration= Key Concepts Classification Of Real-Time Systems Real-Time g overning bodys can be class from different perspectives. The first two classifications, threatening real-time versus easily real-time, and fail-safe versus fail-operational, aim on the characteristics of the application, i.e., on factors outside the computer corpse. The second three classifications, guaranteed-timeliness versus best-effort, resource-adequate versus resource-inadequate, and nonethelesst-triggered versus time-triggered, depend on the design and implementation, i.e., on factors inside the computer system. However this paper focuses on the differences between hard and soft real-time classification. Hard Real-Time versus Soft Real-Ti meThe response time requirements of hard real-time systems argon in the lodge of milliseconds or less and can result in a catastrophe if non met. In contrast, the response time requirements of soft real-time systems atomic number 18 higher(prenominal) and not very stringent. In a hard real-time system, the peak-load performance must be predictable and should not violate the predefined deadlines. In a soft real-time system, a degraded operation in a rarely occurring peak load can be tolerated. A hard real-time system must remain synchronous with the separate of the environment in all cases. On the otherhand soft real-time systems will slow down their response time if the load is very high. Hard real-time systems are often safety critical. Hard real-time systems have small selective information files and real-time databases. Temporal truth is often the concern here. Soft real-time systems for example, on-line reservation systems have larger databases and require long-term integri ty of real-time systems. If an error occurs in a soft real-time system, the computation is rolled back to a previously established checkpoint to initiate a convalescence action. In hard real-time systems, roll-back/recovery is of limited use. Ques2-Name any two important sensors devices and two actuator devices use in real time applications and explain the physical principals behind their bring ining?ANS= angiotensin-converting enzyme actuator is robotic arms that is mainly used in the manufacture company of any car and bike..the robotic adjust the parts of car inside the cabenetInput=tempreture ,,,pressure,light,etc its all the arousal of for the actuatorOutput=electrical signal Ques3-- In a hard real time system, is it necessary that every task in the system be of hard real time type? Explain your answer using a suitable example?Ans-Contain only tasks with no hard timing constraints.Also cognise as best effort systemsMost modern operating systems can serve as the base for a s oft real time systems.Examplesmultimedia transmittance and reception, networking, telecom (cellular) networks,web sites and services, computer games. Contains tasks with hard timing constraints.Requires formal verification/guarantees of being to always meet its hard deadlines (except for fatal errors).Examplesair traffic control , vehicle subsystems control, medical systemsThere are two different execution modelsIn a preemptive model of execution a task may be interrupted (preempted) during its execution and another task run in its place. In a non-preemptive model of execution after a task that starts executing no other task may execute until this task concludes or yields the CPU. The task model for a real time system has two main typesQues4-What are the different types of timing constraints that occur in a system? Give examples of each.Time constraints of data-The controlling system interacts with its environment based on the data available about the environment, say from variou s sensors e.g position , velocity, and altitude, sensors and cameras. It is known that the state of the environment, as perceived by the controlling system, be consistent with the actual state of the environment. The second data is processed further to get along new data, for example data such as aircraft position, heading velocity are used to derive the time at which it would touch ground if allowed to land.Time constraints of actions- having covered the timing aspects of events and data we are now in a position to summarize the reasons for actions being associated with time constraints. Time constraints dictate the behaviour of the environment they constrain the rates and time at which input arrive at the system for example in an air traffic control system, a flight commander must not ask for permission to land until the aircraft is 10 minutes from the airport. Behavioral constraints jibe that the environment of a system is well behaved, whereas performance constraints ensure th at the computer system performs satisfactorily. Each of performance and behavioral constraints can further be classified into the following three types Delay Constraint Deadline Constraint Duration Constraint These three classes of constraints are explained in the subsequent sections. Ques5-Explain why safety and reliability are not single-handed issues in safety-critical hard real time systems. Explain the basic techniques you would adopt to develop a packet product that is required to be highly reliableAns- it will crash, and it wastes lot of time and money to create a new system, and if the system is crash it will not work as a real time system ,it loses the reliability ,therefore it is necessary to hard real time systems that safety and reliability depends on each other, thus system works as a true hard real time system. In traditional systems ,safety and reliability are normally considered to be independent issues .it is therefore possible to identify a traditiona system th at is safe and unreliable and systems that are reliable but unsafe.for ex- word processing software may not be a reliable but is safe, Software Reliability is an important to attribute of software quality, together with functionality, usability, performance, serviceability, capability, installability, maintainability, and documentation. Software Reliability is hard to achieve, because the complexity of software tends to be high. While any system with a high degree of complexity, including software, will be hard to reach a certain level of reliability, system developers tend to push complexity into the software layer, with the rapid growth of system size and ease of doing so by upgrading the software. For example, large next-generation aircraft will have over one million source lines of software on-board next-generation air traffic control systems will contain between one and two million lines the upcoming international Space Station will have over two million lines on-board and ove r ten million lines of ground support software several major(ip) life-critical defense systems will have over five million source lines of software. While the complexity of software is inversely related to softwareQues6-Give an example of soft real time task and non real time task. Explain the difference in between these two types of tasks?Ans- A soft real-time system on the other hand will tolerate such lateness, and may respond with decreased service quality (e.g., omitting frames while displaying a video). Soft real-time systems are typically used where there is some issue of concurrent access and the need to keep a number of connected systems up to appointment with changing situationsa non real time tasks are batch processing jobs,e -mail,and background tasks such an event logers .you may ,however ,argue that even these tasks, in the strict good sense of the term ,do have certain time bounds.an email is expected to reach its destination at least with in a coupleof hours of bein g sent.similar is the case with a batch processing job such a pay-slip printing what then reality is the difference between a non real task and a soft real time task for non real time tasks ,the associated time bounds are typically of the order of a few minutes hours or even days .in contrast the time bounds associated with soft real time tasks are at most of the order

The Effect of Different Antibiotics on Bacteria

The Effect of polar Antibiotics on BacteriaAntibiotics be cargon fors that assassinate bacterium. Bacteria whoremonger start transmittals much(prenominal) as strep throat, ear infections, urinary piece of land infections, and sinus infections (sinusitis). There atomic number 18 many founts of antibiotic drug drugs. Each works a junior-grade differently and acts on different types of bacteria.Dont antibiotics bring to e reallything?Antibiotics atomic number 18 honest medicines, but they stack non cure everything. Antibiotics do non work against illnesses that ar ca utilise by a virus. They do not stand by illnesses such asCommon colds. flu (flu).Most cases of acute bronchitis.Most sore throats not ca apply by strep.Runny noses.These illnesses ordinarily go amodal value by themselves. If you inject antibiotics when you do not postulate them, they whitethorn not work when you do need them. Each time you take antibiotics, you ar more likely to have some bacte ria that the medicine does not kill. Over time these bacteria change (mutate) and become harder to kill. The antibiotics that used to kill them no greater work. These bacteria are called antibiotic-resistant bacteria.These tougher bacteria stub cause dour-acting and more serious infections. In order to treat them you may need different, stronger antibiotics that equal more. A stronger antibiotic may have more fount nucleuss than the first medicine.Antibiotic-resistant bacteria everyplacely kindle spread to family members, children, and friends. Your confederacy then impart have a risk of getting an infection that is harder to cure and costs more to treat. Some antibiotics that doctors once prescribed to treat common infections no longer work. Taking antibiotics you do not need will not help you feel better, cure your illness, or keep others from being infected. On the other hand, take them when unnecessary may cause harmful fount effectuate. Those aspect effects inclu deNausea.Diarrhea.Stomach pain.When antibiotics kill the normal bacteria in your intestine and rent the C.difficilebacteria to invoke, this causes diarrhea, fever, and belly cramps. In some rare cases, it can raze cause death. This condition is known as Clostridium difficilecolitis or C. difficile colitis which is the swelling and aggravator of the large intestine, or colon. Women may develop vaginal barm infections from taking antibiotics. Rarely, antibiotics can cause a chancy allergic reaction that requires emergency care.The decent way to take antibioticTake it exactly as directed. Always take the exact step that the denounce says to take. If the label says to take the medicine at a real time, follow these directions.Take it for as long as prescribed. after the first few old age of taking the medicine, you might feel better. However, it is of import to keep taking the antibiotic as directed and usually until it is finish. Full prescription is always needed to get rid o f those bacteria that are a bit stronger and able to survive the first few days of treatment. Bacteria that an antibiotic cannot kill (antibiotic-resistant bacteria) can develop if just now part of an antibiotic prescription is being taken. Most importantly, leftover medicine mustiness not be saved for the purpose of future use.Antibiotics are usually safe despites of all the look effects. Common side effects include nausea, diarrhea, and stomach pain. In women, antibiotics can lead to vaginal yeast infections. Some minor side effects are inevitable. In rare cases, antibiotics can cause a dangerous allergic reaction that requires emergency care.Antibiotics are among the most frequently prescribed medications in neo medicine. Antibiotics cure disease by killing or injuring bacteria. After the first antibiotic, penicillin which was accidentally been criminal recordovered from a mold culture, there are now over 100 different antibiotics available to cure minor discomforts as well as life-threatening infections.Although antibiotics are useful in a wide variant of infections, it is important to realize that antibiotics further treat bacterial infections. Antibiotics are useless against viral infections such as the common cold and fungal infections ringworm.Types of AntibioticsAlthough there are well over 100 antibiotics, the majority come from only a few types of drugs. These are the main classes of antibiotics.Penicillins such as penicillin andamoxicillinCephalosporins such as cephalexin(Keflex)Macrolides such as erythromycin (E-Mycin), clarithromycin (Biaxin), andazithromycin (Zithromax)Fluoroquinol unitarys such as ciprofloxacin(Cipro), levofloxacin (Levaquin), andofloxacin (Floxin)Sulfonamides such as co-trimoxazole (Bactrim) and trimethoprim (Proloprim)Tetracyclines such as tetracycline (Sumycin, Panmycin)Aminoglycosides such as gentamicin (Garamycin) and tobramycin (Tobrex)The use of right antibiotic is crucial as each antibiotic cures only certain ty pes of infections but not all. Also, a person may have allergies that eliminate a class of antibiotic from consideration, such as a penicillin allergic reaction which should not prescribe amoxicillin. Other factors may be considered when choosing an antibiotic. Medication cost, dosing schedule, and common side effects are often taken into account. Patterns of infection in your community may be considered too.In some cases, laboratories may help to decide which antibiotic to be used. Special techniques such as thousand stains may help narrow down which species of bacteria is causing infection. This is because certain bacterial species will take a stain while the others will not. Cultures may also be obtained. In this technique, a bacterial sample from infection is allowed to beat in a laboratory. The way bacteria grow or what they look like when they grow can help to identify the bacterial species. Cultures may also be tested to go under antibiotic sensitivities. A sensitivity lis t is the roster of antibiotics that kill a particular bacterial type. This list can be used to double check mark that you are taking the right antibiotic.Escherichia coliE. coli is a common type of bacteria that can get into food, like beef and vegetables. E. coli is short for the medical term Escherichia coli. The conflicting thing nigh these bacteria and lots of other bacteria is that theyre not always harmful to you.Theodor Escherich first described E. coli in 1885, as Bacterium coli commune, which he isolated from the feces of newborns. It was later renamed Escherichia coli, and for many years the bacteria was simply considered to be a commensal organism of the large intestine. It was not until 1935 that a tenor voice of E. coli was seen to be the cause of an outbreak of diarrhea among infants. The GI tract of most warm- bloodlineed animals is colonized by E. coli within hours or a few days after birth. The bacterium is ingested in foods or pissing or obtained directly f rom other individuals handling the infant. The human bowel is usually colonized within 40 hours of birth. E. coli can adhere to the mucus overlying the large intestine. erst established, an E. coli strain may persist for months or years. Resident strains shift over a long period (weeks to months), and more rapidly after enteric infection or antimicrobial chemotherapy that perturbs the normal flora. The entire DNA base sequence of the E. coli genome has been known since 1997.E. coli ordinarily lives inside your intestines, where it helps the body to break down and digest the food. Unfortunately, certain types of E. coli can get from the intestines into the blood. This is a rare illness, but it can cause a very serious infection.Someone who has E. coli infection may have these symptoms hurtful stomach cramps and belly painvomitingdiarrhea, sometimes with blood in itOne very bad strain of E. coli was found in fresh spinach plant in 2006 and some fast-food hamburgers in 1993. Beef ca n contain E. coli because the bacteria often infect cattle. It can be in meat that comes from cattle and its also in their poop, called manure.E. coli is a consistent inhabitant of the human intestinal tract, and it is the predominant facultative organism in the human GI tract however, it makes up a very small proportion of the total bacterial content. The anaerobic Bacteroides species in the bowel outnumber E. coli by at least 201. However, the continuous presence of E. coli in the human intestine and feces has led to tracking the bacterium in nature as an indicator of fecal pollution and water pollution. As such, it is taken to mean that, wherever E. coli is found, there may be fecal contamination by intestinal parasites of humans. Physiologically, E. coli is versatile and well-adapted to its characteristic habitats. It can grow in media with glucose as the only organic constituent. Wild-type E. coli has no growth factor requirements, and metabolically it can transform glucose i nto all of the macromolecular components that make up the cell. The bacterium can grow in the presence or absence of O2. Under anaerobic conditions it will grow by means of fermentation, producing characteristic mixed acids and gasolene as end products. However, it can also grow by means of anaerobic respiration, since it is able to utilize NO3, NO2 as final negatron acceptors for respiratory electron transport processes. In part, this adapts E. coli to its intestinal (anaerobic) and its extra intestinal (aerobic or anaerobic) habitats.E. coli can respond to environmental signals such as chemicals, pH, temperature, osmolarity. Therefore, in a number of very remarkable ways considering it is a unicellular organism. For example, it can sense the presence or absence of chemicals and gases in its environment and swim towards or away from them. It can stop swimming and grow fimbriae that will specifically attach it to a cell or surface receptor. In response to change in temperature and osmolarity, it can vary the pore diameter of its outer membrane to accommodate big molecules (nutrients) or to exclude inhibitory substances. With its complex mechanisms for regulation of metabolism the bacterium can survey the chemical contents in its environment in advance of synthesizing any enzymes that metabolize these compounds. It does not wastefully arouse enzymes for degradation of carbon sources unless they are available, and it does not produce enzymes for synthesis of metabolites if they are available as nutrients in the environment.Figures 1.1 1.2 Escherichia colistaphylococci aureusFigure 1.3 Electron micrograph of Staphylococcus aureusThe StaphylococciStaphylococci (staph) are confirming spherical bacteria that occur in microscopic clusters resembling grapes. Bacteriological culture of the nose and skin of normal humans invariably yields staphylococcus. In 1884, Rosenbach described the deuce pigmented colony types of staphylococci and proposed the appropriate no menclature Staphylococcus aureus (yellow) and Staphylococcus albus (white). The latter species is now named Staphylococcus epidermidis. Although more than 20 species of Staphylococcus are described in Bergeys Manual (2001), only Staphylococcus aureus and Staphylococcus epidermidis are significant in their interactions with humans. S. aureus colonizes mainly the nasal passages, but it may be found regularly in most other anatomical locales, including the skin, oral cavity and gastrointestinal tract. S epidermidis is an inhabitant of the skin.Taxonomically, the genus Staphylococcus is in the Bacterial family Staphylococcaceae, which includes three lesser known genera, Gamella, Macrococcus and Salinicoccus. The known of its nearby phylogenetic relatives are the members of the genus Bacillus in the family Bacillaceae, which is on the same level as the family Staphylococcaceae. The Listeriaceae are also a nearby family.Staphylococcus aureus forms a fairly large yellow colony on rich med ium S. epidermidis has a relatively small white colony. S. aureus is often hemolytic on blood nutrient agar S. epidermidis is non hemolytic. Staphylococci are facultative anaerobes that grow by aerobic respiration or by fermentation that yields principally lactic acid. The bacteria are catalase-positive and oxidase-negative. S. aureus can grow at a temperature range of 15 to 45 degrees and at NaCl concentrations as high as 15 percent. Nearly all strains of S. aureus produce the enzyme coagulase nearly all strains of S. epidermidis lack this enzyme. S. aureus should always be considered a potential pathogen most strains of S. epidermidis are non-pathogenic and may even play a protective reference in humans as normal flora. Staphylococcus epidermidis may be a pathogen in the hospital environment.Staphylococci are perfectly spherical cells about 1 micrometer in diameter. The staphylococci grow in clusters because the cells divide successively in three perpendicular planes with the sis ter cells remaining attached to one another(prenominal)(prenominal) following each successive division. Since the exact point of attachment of sister cells may not be within the divisional plane and the cells may change position s conflagrately while remaining attached, the result is formation of an irregular cluster of cells.The shape and configuration of the Gram-positive cocci helps to distinguish staphylococci from streptococci. Streptococci are slightly oblong cells that usually grow in chains because they divide in one plane only, similar to a bacillus. Without a microscope, the catalase test is important in distinguishing streptococci (catalase-negative) from staphylococci, which are vigorous catalase-producers. The test is performed by adding 3% hydrogen peroxide to a colony on an agar plate or slant. Catalase-positive cultures produce O2 and bubble at once. The test should not be make on blood agar because blood itself contains catalase.Figure 1.4 Gram stain of Staphylococ cus aureus in pustular exudateFigure 1.5 Staphylococcus aureusProblem statement Which antibiotic is most legal on bacteria?Hypothesis Different antibiotics have different effect on bacteria. Ampicillin is the most rough-and-ready antibiotic against Escherichia Coli and Staphylococcus aureus compared to other antibiotics.VariablesManipulated Variable Types of antibiotics and types of bacteria.Responding Variable The diameter of clear regularize virtually the paper discs.Fixed Variable Surrounding temperature, humidity, light intensity, size of paper discs.Apparatus Agar plate, Bunsen burner, marker pen, autoclaved forceps.Materials Bacteria E. coli, bacteria S. aureus, terrace spray of disinfectant, 1% Virkon, soap and dettol, paper towels, antibiotic- impregnated paper disc, adhesive tape.ProcedureHands are washed with dettol handwash. Disinfectant spray is sprayed thoroughly to the functional area. typography towels are then used to wipe the working area.Two uninspired Pet ri sweetheartes are tagged correctly. One is filled with the bacteria S. aureus and another one with E. coli. The label is pasted at the side of the Petri dishes.The apparatus needed bottle containing sterile nutrient agar, micropipette with sterile tips, Bunsen burner, bottle containing bacteria cultures and sterile Petri dishes labeled correctly.200ml of E. coli bacteria culture is pipetted into a sterile Petri dish beside a burning Bunsen burner.Molten agar is poured into the Petri dish until the bottom of the Petri dish is covered by the agar.The Petri dish is then covered and gently pushed back and forth and in all four directions to mix the bacteria well with the agar.The agar is then allowed to set.Steps 4 to7 are repeated for S. aureus.The 2 Petri dishes containing the agar lawn are allowed to set.One paper disc is placed in a solution of antibiotics named Ampicillin using sterile forceps.The paper disc is then soaked into Petri dish containing the agar.Steps 10- 11 are re peated for antibiotics Tetracyclin, Carbenicillin, and sterilized distilled water.The Petri dish is closed and the bottom of the Petri dish is labeled to identify the position of each paper disc.The agar plates are then left in 30.0 0C incubator for 24 hours.Hands are washed thoroughly again after working with the bacteria culture.After 24 hours, the agar plates are observed with the Petri dishes closed. The diameter of the clear region around the paper discs are measured and recorded. The results are recorded in a tablePrecautionsThe bacteria must be pipetted into the agar before the agar is set so that the bacteria can mix well with it.During observation, the lid of the Petri dishes must not be lifted up as the bacteria are harmful to our healths.After working with the bacteria culture, hands must be washed with disinfectant in order to avoid any infections.ResultAntibioticsDiameter of the clear zone, cmEscherichia coliStaphylococcus aureusAmpicillin3.23.0Tetracycline2.32.7Carbeni cillin1.32.8Distilled water0.50.5DiscussionsAnalysis of dataFrom the result, it is found that the largest inhibition zone or clear region is formed around the paper disc soaked in Ampicillin for E. coli bacteria lawn, followed closely by Tetracyclin and Carbenicillin. Ampicillins paper disc caused the largest area of inhibition zone in E. coli. This showed that Ampicillin is most effective in inhibiting the growth of the E. coli. Meanwhile, Carbenicillins paper disc which caused the smallest area of inhibition zone in E. coli showed that it is the weakest antibiotic against E. coli.Similarly, Ampicillin is also the most effective antibiotic against bacteria Staphylococcus aureus as the area of inhibition zone around the paper disc soaked with Ampicillin solution is the greatest, which has a diameter of 3.0 cm. Followed by that is the antibiotic Carbenicillin and the least effective antibiotic is Tetracyclin which has a slightly smaller diameter of clear zone than Cabenicillin, which is 2.7cm.Therefore, it can be concluded that Ampicillin is the most effective antibiotic against both type of bacteria and being the broad spectrum antibiotic while the effectiveness of Tetracyclin and Carbenicillin towards both bacteria varied. This showed that different antibiotic has different effect on different bacteria as well.The inhibition zones are all circular. If it is not circular, it is sensible that the diameter should be measured by using ii points which are furthest from each other within the clear region. The diameter of the inhibition zones is takeed by the strength of antimicrobial properties of the antibiotics towards different bacteria. It is important not to always choose the antibiotic with the largest inhibition zone to treat the patients as some other factors should be considered as well such as the side effect caused by the antibiotics, the conditions of the patients and the risk of that particular antibiotics.ControlIn this experiment, the control used is the sterilized distilled water. Paper discs soaked in sterilized distilled water are also put in two of the Petri dishes. This is to show that the sterilized distilled water has no effect on the bacteria. This enables us to compare the results for paper discs with the antibiotics and those with the distilled water to show that the formation of the inhibition zone or the clear region is due to the antibiotics but not because of the presence of water. In this case, clear region cannot be seen around the paper disc soaked in sterilized distilled water in both Petri dishes. Therefore, the presence of clear region around other paper discs must be due to the antimicrobial property of the antibiotics.VariablesThree different antibiotics are used in this experiment to manipulate the types of antibiotics and to compare the effectiveness of each antibiotic to inhibit the growth of the bacteria. The antibiotics used are Tetracycline, Carbenicillin and Ampicillin. Two different types of bact eria, E. coli and S. aureus are manipulated by putting them in different Petri dishes with the agar medium. This enables us to identify the change antimicrobial properties of the same antibiotics on different types of bacteria.The responding variable in this experiment is the diameter of the clear region around the paper discs after 24 hours. The greater the diameter of the clear zone around the paper discs, that means the more effective the antibiotic inhibiting the growth of the bacteria. The diameter of the clear zone can be measured from one point of the circular clear region to another point through the centre point by using a ruler.The amount of different bacteria cultures used must be the same by pipetting equal amount of the two bacteria, which is 200 ml into the agar medium. The temperature, humidity and light intensity must also be kept constant throughout the experiment. All these factors may affect the rate of growth of the bacteria. This can be done by placing the two agar plates into an incubator at 30 0 C. The size of the paper discs should also be kept constant. Paper discs which are larger will absorb more antibiotics and may lead to a greater diameter of clear zone compared to the smaller paper discs in the same bacteria culture. This is done by preparing the paper discs using the same puncher to ensure all the paper discs are of the same size.Justification of apparatus and materialsIn this experiment, the antibiotics used are Tetracycline, Streptomycin and Carbenicillin solutions. These antibiotics are more common antibiotics which are more easily available. The antibiotics have already been prepared in solutions form. This enables the paper discs to be soaked in the solutions directly and easier. The bacteria used are S. aureus and E. coli, they are practically easier to be grown and culture in agar plates. However, these two bacteria may be harmful to our health, therefore the lids of the agar plates are not allowed to be opened during ob servation. This is to keep us from getting any infections from these bacteria.Bunsen burner is used in this experiment to minimize the contamination of the experimental sets while preparing them. For example, the forceps are being flamed before being used to pick up the paper discs soaked in the antibiotics solutions. Micropipette is used to transfer the 200 ml bacteria into the agar medium. The used of micropipette with sterile tips further improved the accuracy of the result.Validity and dependableness of the resultsAccording to the result from another group, Ampicillin is the most effective antibiotic towards only E. coli bacteria. Cabernicillin is most effective towards S. aerues and this is different from the result of my group. This may properly cause by contamination which affect the accuracy of the result. However, for the bacteria E. coli, the diameter of clear zone caused by the paper disc soaked in Cabernicillin is 1.3 cm for my group while the result of another group sh owed no clear zone around it. Therefore, it can be concluded that Carbenicillin is the least effective antibiotics towards E. coli for two groups. Besides, in order to increase the reliability of the experiment, the variables are controlled carefully. The constant variables are kept constant while only manipulating the variables that are being studied.Sources of errorsOne possible source of errors may be the contamination of the agar medium. This occurred when saliva is accidentally being transferred to the agar during preparation. Another possible source of error could be the purity of the antibiotics used. Some of the antibiotics solutions may be pollute by some impurities which could decrease their antibacterial properties. Also, human error can take place especially when measuring the diameter of the clear zones.ConclusionThe assumption is accepted. Different antibiotics have different effect on bacteria. Ampicillin is the most effective antibiotic against Escherichia Coli and Staphylococcus aureus compared to other antibiotics.Antibiotics are medicines that kill bacteria. Bacteria can cause infections such as strep throat, ear infections, urinary tract infections, and sinus infections (sinusitis). There are many types of antibiotics. Each works a little differently and acts on different types of bacteria.Dont antibiotics cure everything?Antibiotics are powerful medicines, but they cannot cure everything. Antibiotics do not work against illnesses that are caused by a virus. They do not help illnesses such asCommon colds.Influenza (flu).Most cases of acute bronchitis.Most sore throats not caused by strep.Runny noses.These illnesses usually go away by themselves. If you take antibiotics when you do not need them, they may not work when you do need them. Each time you take antibiotics, you are more likely to have some bacteria that the medicine does not kill. Over time these bacteria change (mutate) and become harder to kill. The antibiotics that used to ki ll them no longer work. These bacteria are called antibiotic-resistant bacteria.These tougher bacteria can cause longer and more serious infections. In order to treat them you may need different, stronger antibiotics that cost more. A stronger antibiotic may have more side effects than the first medicine.Antibiotic-resistant bacteria also can spread to family members, children, and friends. Your community then will have a risk of getting an infection that is harder to cure and costs more to treat. Some antibiotics that doctors once prescribed to treat common infections no longer work. Taking antibiotics you do not need will not help you feel better, cure your illness, or keep others from being infected. On the other hand, take them when unnecessary may cause harmful side effects. Those side effects includeNausea.Diarrhea.Stomach pain.When antibiotics kill the normal bacteria in your intestine and allow the C.difficilebacteria to grow, this causes diarrhea, fever, and belly cramps. I n some rare cases, it can even cause death. This condition is known as Clostridium difficilecolitis or C. difficile colitis which is the swelling and irritation of the large intestine, or colon. Women may develop vaginal yeast infections from taking antibiotics. Rarely, antibiotics can cause a dangerous allergic reaction that requires emergency care.The right way to take antibioticTake it exactly as directed. Always take the exact amount that the label says to take. If the label says to take the medicine at a certain time, follow these directions.Take it for as long as prescribed. After the first few days of taking the medicine, you might feel better. However, it is important to keep taking the antibiotic as directed and usually until it is finish. Full prescription is always needed to get rid of those bacteria that are a bit stronger and able to survive the first few days of treatment. Bacteria that an antibiotic cannot kill (antibiotic-resistant bacteria) can develop if only part of an antibiotic prescription is being taken. Most importantly, leftover medicine must not be saved for the purpose of future use.Antibiotics are usually safe despites of all the side effects. Common side effects include nausea, diarrhea, and stomach pain. In women, antibiotics can lead to vaginal yeast infections. Some minor side effects are inevitable. In rare cases, antibiotics can cause a dangerous allergic reaction that requires emergency care.Antibiotics are among the most frequently prescribed medications in modern medicine. Antibiotics cure disease by killing or injuring bacteria. After the first antibiotic, penicillin which was accidentally been discovered from a mold culture, there are now over 100 different antibiotics available to cure minor discomforts as well as life-threatening infections.Although antibiotics are useful in a wide variety of infections, it is important to realize that antibiotics only treat bacterial infections. Antibiotics are useless against viral in fections such as the common cold and fungal infections ringworm.Types of AntibioticsAlthough there are well over 100 antibiotics, the majority come from only a few types of drugs. These are the main classes of antibiotics.Penicillins such as penicillin andamoxicillinCephalosporins such as cephalexin(Keflex)Macrolides such as erythromycin (E-Mycin), clarithromycin (Biaxin), andazithromycin (Zithromax)Fluoroquinolones such as ciprofloxacin(Cipro), levofloxacin (Levaquin), andofloxacin (Floxin)Sulfonamides such as co-trimoxazole (Bactrim) and trimethoprim (Proloprim)Tetracyclines such as tetracycline (Sumycin, Panmycin)Aminoglycosides such as gentamicin (Garamycin) and tobramycin (Tobrex)The use of right antibiotic is crucial as each antibiotic cures only certain types of infections but not all. Also, a person may have allergies that eliminate a class of antibiotic from consideration, such as a penicillin allergy which should not prescribe amoxicillin. Other factors may be considered w hen choosing an antibiotic. Medication cost, dosing schedule, and common side effects are often taken into account. Patterns of infection in your community may be considered too.In some cases, laboratories may help to decide which antibiotic to be used. Special techniques such as Gram stains may help narrow down which species of bacteria is causing infection. This is because certain bacterial species will take a stain while the others will not. Cultures may also be obtained. In this technique, a bacterial sample from infection is allowed to grow in a laboratory. The way bacteria grow or what they look like when they grow can help to identify the bacterial species. Cultures may also be tested to determine antibiotic sensitivities. A sensitivity list is the roster of antibiotics that kill a particular bacterial type. This list can be used to double check that you are taking the right antibiotic.Escherichia coliE. coli is a common type of bacteria that can get into food, like beef and vegetables. E. coli is short for the medical term Escherichia coli. The strange thing about these bacteria and lots of other bacteria is that theyre not always harmful to you.Theodor Escherich first described E. coli in 1885, as Bacterium coli commune, which he isolated from the feces of newborns. It was later renamed Escherichia coli, and for many years the bacterium was simply considered to be a commensal organism of the large intestine. It was not until 1935 that a strain of E. coli was shown to be the cause of an outbreak of diarrhea among infants. The GI tract of most warm-blooded animals is colonized by E. coli within hours or a few days after birth. The bacterium is ingested in foods or water or obtained directly from other individuals handling the infant. The human bowel is usually colonized within 40 hours of birth. E. coli can adhere to the mucus overlying the large intestine. Once established, an E. coli strain may persist for months or years. Resident strains shift over a long period (weeks to months), and more rapidly after enteric infection or antimicrobial chemotherapy that perturbs the normal flora. The entire DNA base sequence of the E. coli genome has been known since 1997.E. coli normally lives inside your intestines, where it helps the body to break down and digest the food. Unfortunately, certain types of E. coli can get from the intestine

College Admissions Essay: Not Old Enough to Drink, yet Admitted to the Bar! :: College Admissions Essays

Not Old Enough to Drink, yet Admitted to the Bar   I am cardinal years old peeking pop of my window as the mail truck makes a quick stop at my house.  Barefoot and shivering, I sprint out to the mailbox.  With trembling hands I open the envelope.  I did it I passed the BAR exam               My goal since beginning high school has been to pursue a life story in law.  Since then, I have been consistently taking steps toward my goal in every way possible.  I have interned at the Baltimore District Attorneys office, which was superstar of the most unique experiences of my life.  I attended a variety of legitimate processes, from homicide and drug-related trials to assault arraignments.  Most people would prefer to be oblivious to knowledge of crimes that spend locally.  I am fascinated by it.  I will be responsible for prosecuting criminals.  I will play my part in making my participation a better place to live.               The thought of being in court excites me.  Unlike most peoples attitude toward traffic court, I was thrilled to be attending court after receiving my first speeding ticket a few months earlier.  Television shows that deal with law excite me as well.  Every Sunday dark at ten oclock my family knows where to find me-glued to the television watching The Practice with a smile on my face.               I currently work as a juristic assistant at Rapaport and Skalny, a local law firm that specializes in litigation.  I am learning so much about the law with severally project I work on.  Although the majority of the work I do there is filing and typing of documents, I remain fascinated with the entire legal system.  I love the fact that the work I do contributes to lawsuits going to court and to clients paying for much needed serv ices.                As I head toward college, I continue to take steps getting closer to my main goal.

Pan American World Airways, Inc :: Economy Economics Economical Papers Research

Pan American World Airways, Inc Pan American World Airways, Inc (Pan Am) is a New York corporationorganized in 1927 which is engaged in commercial air transportation whichit pioneered between the United States and most areas of the world. Pan AmCorporation (the Corporation), a Delaware corporation, is and sinceSeptember 14, 1984 has been the parent of Pan Am, its principal subsidiary. For the past few years Pan Ams financial condition has been very poor.The follow reported a consolidated net loss for 1986 of $469.3 jillion.The 1988 net loss included a gull of $89.1 million resulting from the saleof Pan Ams Airbus A320 aircraft and delivery positions. This gain waspartially offsetted by a reserve of $25.7 million related to the loss onsale of Pan Ams subsidiary, which is responsible for the marketing ofexcess inventory, and 18 million of year-end adjustments. Pan Ams passenger traffic was strong in 1988. An increase of 12.2percent on capacity of 11.2 percent. This was due to the result ofstrengthening of various European currencies against the U.S. dollar, fareincreases in the market, enhanced management systems and procedures, as easily as programs to reduce the dependence on wholesale ticket distributionsthroughout the Atlantic, Latin America, Domestic, and systemwide. Eventhough revenue was strong in 1988, labor and other cost increasedat a higher rate as a consequence of efforts to improve serving andeffectiveness of the operation. Labor costs were higher in 1988 due to theresult of an increase in the number of employees during the year. Also theaddition of increased fuel prices, commissions, purchased services,aircraft rentals, and a $24.0 million foreign exchange loss had a negativeimpact on the corporation. 1987 expenses were effected by increases in expenses for fuel,commissions, maintenance materials and other operating costs which exceededexpectations. Labor cost reductions were not achieved in 1987. Other losseswhich occurred wa s the settlement of an $18 million provision for theproposed settlement of an age discrimination suit, and as well as $42.0million for increased allowances for inventory obsolescence, uncollectedreceivables and costs associated with the WorldPass frequent flyer program.COMPANY BACKGROUND Pan Am lead by its burst Juan Trippe, virtually single- handedlyopened up the world to commercial flight. Teeming with adventure,international intrigue, and financial manipulations, this sky-struck youngman with immense ambition and vision took a aviate carrying mail 90 milesfrom Key West to Havana and expanded the operation into the vast world-wide