History of Bacteria, Penicillin and Germ Theories

History of Bacteria, Penicillin and Germ Theories Mursal Malekzadeh THE GERM THEORY How this all began was before the germ theory was developed. Edward Jenner who was a doctor came up with vaccination. Smallpox was popular in the 18th century and so many people died due to the smallpox. Girls who would milk cows didn’t catch smallpox but instead caught cowpox. There was no research into disease and infections in the 18th century. Edward Jenner thought of an idea. He thought that people could be protected from smallpox if he would inject them with cowpox so therefore in 1794 he tried this idea which proved his prediction right. Also to provide clear evidence he injected a smallpox victim into the same person he injected cowpox with 2 months after. This caused the person to show no signs of smallpox because he had been injected with cowpox previously. Jenner’s idea became widely accepted as it cured a lot of smallpox victims. Jenner’s technique of injected cowpox into smallpox victims is now called vaccination. In the 1980s the world health organi sation suggested that the disease didn’t exist anymore due to an international vaccination programme. This got rid of smallpox. Although Edward Jenner’s theory was correct and there’s evidence to prove it but his technique would not be permitted today because its considered unethical to use healthy participants and inject them. In the 18th and 19th century many women who just gave birth were dying within 5 days of their delivery. There were clear symptoms such as vomiting and inflammation of the womb however no one knew why this was happening. Ignaz Semmelweiss was a doctor who worked in the maternity wards. Semmelweiss found out that his medical students would straight away dissect a dead body to delivering a baby without washing their hands. This made him think if they had the cause of the disease on their hands from the dead patients previously to their pregnant patients. Semmelweiss knew that the deaths were caused by an infectious agent so therefore he told all his medical students to wash their hands in soap before they went to the maternity ward. This was effect because the death rates dropped to 1% after 2 years. On the other hand other doctors wouldn’t agree with Semmelweiss idea because they thought the pain women received after childbirth was due to god punishing them. Washing hands in the 19th century was hard because there wasn’t always running warm water and the soap made of chlorinated lime would damage the hands but today everyone washes before and after they do anything. Later in the 1920s Alexander Fleming discovered Penicillin. He noticed a lot of mould on his plates after he came back from holiday. One day he used mould juice which he called penicillin but the problem was that he couldn’t get a lot of mould juice because it would go bad so this made him stop doing experiments to prove if penicillin would kill bacteria. In 1938 Howard Florey and Ernst Chain did further research into penicillin. One of their experiments were based on 8 mice which they injected 4 of them with bacteria that would kill them and 4 with penicillin. The results showed that the 4 injected with penicillin survived whereas the other remaining 4 died. They could prove that penicillin destroyed bacteria. The next problem was making enough of it for everyone so they went to USA with their mould and the big chemical companies helped them make penicillin. Penicillin is very popular today as it has been used by many to destroy bacterial infections. All these past events influenced Pasteur to come up with the germ theory. The germ theory of disease is thought that infectious diseases are caused by a germ. Louis Pasteur who was a chemist and biologist did a lot of research into the germ theory. In order to help him with his experiments people such as Robert Koch developed the microscope so that microorganisms were visible. Pasteur had an idea that growths that developed like mould on food, were from microscopic organisms which were in the air. Pasteur did some experiments to see if his prediction was correct so he boiled broth and closed the container and it would be clear however when he added other things that were exposed to the air, he saw that microorganisms developed in the broth which caused it to be cloudy. He repeated many more experiments until he came up with a series of experiments which used swan necked flasks because this proved that microorganisms that appear in boiled broth come from the air. In 1845 a disease destroyed silkworms. Pasteur again knew this was due to microorganisms because it was found in the tissues of diseased silkworms, moths and eggs which were possible to see by using a microscope. Pasteur tried to get rid of the disease by identifying the eggs which were infected. This helped to save the silk industry and there was clear evidence of microorganisms causing disease. Many people died of infectious diseases but Pasteur did a lot of investigation on these diseases so therefore he developed vaccines against these diseases. Many of Pasteur’s investigations and experiments influenced Joseph Lister who was a scientist. Pasteur came up with the idea of pasteurisation which is that boiling liquid can effectively remove bacteria or germs. People thought that small organisms as germs couldn’t destroy larger ones such as humans. Pasteur did further investigation in order to explain the causes of many diseases such as smallpox, anthrax, TB and cholera. He found out that these diseases could be eliminated by vaccination and eventually will leave the body. Pasteur became very successful when he developed vaccinations for Rabies. Joseph Lister was influenced by Pasteur’s work. He was a surgeon and used Pasteur’s ideology’s to make the process of surgery more hygienic which eventually prevented many people from dying When Lister found out about Pasteurs experiments on wine going bad due to microorganisms in the air, he knew that microorganisms present in the air were causing his patients to die after they had survived surgery. This was due to the infection as the open wounds made it easier for the germs to transfer into the body. People would use carbolic acid to get rid of cattle parasite in fields so Lister thought it could stop wounds from getting infected by cleaning the patients wounds with carbolic acid as well as soaking the dressings in antiseptic liquid. Listers antiseptic surgery caused the death rate to fall to 15% but before Lister came up with his antiseptic surgery the death rate was high due to the bacteria in the air and the lack of using any antiseptic when doing surgery. Recent events that happened include the discovery of Methiciliin in 1960 in order to treat infections caused by bacteria resistant to penicillin. In 2008 the cervical cancer vaccination programme was developed and introduced in UK. It was suggested to vaccinate girls aged 12 against HPV. 3 vaccinations are given every six months. This vaccination helps to protect against types of HPV. In conclusion all these events tell us that vaccination is very effective so therefore ever since vaccination was first discovered it has been successful. References http://www.abpischools.org.uk/page/modules/infectiousdiseases_timeline/index.cfm?coSiteNavigation_allTopic=1 http://www.bbc.co.uk/history/historic_figures/pasteur_louis.shtml

Edgar Degas, man the myth the artist :: essays research papers fc

It is in his concepts of man versus himself, his studying of light, capturing a moment and use of large shapes to flatten space that makes Edgar Degas an impressionist. In comparison to his peers, Degas has a tight style of painting and defined, characterized, figures; yet, it is not style that defines impressionism: â€Å"Unlike realism, impressionism rarely responded to politics†¦ impressionist painters preferred genre subjects, especially scenes of leisure activities, entertainment and landscape, and impressionism was more influenced by Japanese prints and new developments in photograph†¦Ã¢â‚¬  (Adams, 805) Laurie Schneider Adams defines the impressionist movement, being careful not to describe the use of paint and its thick application. She does this to clarify that impressionism is a concept not a style. While most impressionist do coat their canvas, style is second to the idea that the observed properties of light and color. It is in this understanding that Edgar Degas’ Ballet Dancer with Arms Crossed is an impressionistic painting.   Ã‚  Ã‚  Ã‚  Ã‚  With an asymmetrical composition, Edgar Degas’ 1872 painting, Ballet Dancer with Arms Crossed is 24 1/8 x 19 7/8 inches large. Large graphic shapes, mostly red or yellow in tone, form a brooding dancer. A sensation of three dimensionality is achieved with two light sources, one bring and the other dim. The front of her body is dimly lit, allowing soft light to give great detail to the collarbone and face. Although never confirmed, this painting is most likely one of Degas numerous sketches. A notorious perfectionist, Degas would often bring his original charcoal drawings to finish in order to prepare for a future piece. Before impressionism, during the realist movement, there was an underlining message of man versus nature. With the industrial revolution, a new message arrived: man versus himself. This message was most evident in Degas’ many equestrian paintings; Laurie Schneider Adams states, â€Å"In At the Races, Degas’ figures are in a state of restlessness†¦ At the left, a single horse gallops into the picture plane as his jockey reins him. The arrested movement of the galloping horse draws attention to the distant train that continues on†¦ Degas refers to the contrast between mechanized and natural movement and to the changing modes of transportation created by the industrial revolution.† (Adams, 821) The industrial Revolution continued mans affair with himself: the ambition to always perfect, refine, and move forward. Degas often composes natural and unnatural forms juxtapose, in Ballet Dancer with Arms Crossed the comparison is in light.

Different between secondary school and university Essay

I used to say that I could not wait until I finished secondary school and have a greater say in what do. In reflection I can say that my experience in secondary school was more fulfilling for me than the university currently is for me. As I commenced my secondary school life, I was registered. Although I registered at the beginning of my university life, I have to register every semester for the courses that I would be pursuing. In addition, at secondary school level everything was handed out to me; while at the university I have to collect my information for different courses. I believe that secondary school was easier because if I did not understand a topic, teachers were easily accessed. If I do not understand a topic at university I have to wait until the tutorial or office hours. I easily interacted with my teachers while at the university some of my lectors are not approachable. In secondary school I had three sets of vacations while at university I only have two sets of vacations. In addition, secondary school had two set of three weeks’ vacation and a ten weeks summer while university have one month in the Christmas vacation and four months for summer vacation. I found that at secondary school I was taught the fundamentals of learning, while the university teaches me the advance structure of learning. I learned subject and verb agreement and not how to write essay but at university I learn additional fundamental of English like topic sentence use of punctuation marks and structure different types of essays. I also learned basic United Kingdom accounting principle for Caribbean Examination Council level. United State accounting is taught at the university level. In addition, secondary school I did internal exam and was promoted to the year level while I do exams to earn credits towards my degree at the university. I did external exam and gain Caribbean Examination Council (CXC) certificate in several subjects but the university does an increment of courses and receive one degree. The secondary school structure is rigid while the university structure is flexible. The School year is divided into three terms while the university has semesters. In addition at secondary school the children have a long summer vacation while university students have the option of attending summer school. School class times were scheduled for a school year while at the university classes would be chosen by me and changes every semester. I remember having one break time and a fixed hour for lunch whereas for university I can have lunch at time where there is free period. There were many rules at school which were enforced. However, there are some at the university which student are not acquainted with and no one enforces them. For example, if I did not attended classes regularly, the principal would call my parents. However at university there is not anyone who checks up and realized when I am missing from lectures or tutorial sessions. Furthermore, there was a uniform at school that I wore; in fact, the principal and teachers made sure we wore our uniforms correctly. However, at university I can wear my own clothes, which my mother provide for me. I remember the principal sent me back home a last day for having on braids. Now I can wear braids, weave and even colour my hair at the university. Secondary School was small and had limited classrooms but university is bigger and have many different rooms. When I was at school I had a form room where I could eat my lunch and talk to my friends. On the other hand at the university I do not have any fixed room that I can be in. There was also small number of children in the class in contrast to the large number of students at university. Most of the teaching was done in our form room whereas I have to go different places for lectures and tutorials. I knew everyone in my class because they came from first to fifth form, and some of the other children throughout the school. However, I am unable to know everyone in the lectures and I only know a few in the tutorial since my courses changes ever semester. I was able to have a face to face teaching at school whereas I am taught different ways at the university such as lecture, tutorials and online learning. The work load at university is much heavier than at secondary school although I did eight subject at CXC level and I am only doing four course a semester. I conclude although secondary school was structure and rigid I thoroughly enjoyed my life there and those memories would remain with me forever. Even though, my university life is flexible and I have a greater say on my activities, I can now say that I prefer the structure of secondary school life.

Personal Narrative My Miracle From God - 1519 Words

My Miracle from God It was January 18, 2009. The day I had to get an emergency C-section, I was 37 weeks pregnant and the doctors found out I had a condition called preeclampsia, which had turned into eclampsia. I was quite sick and the only cure for eclampsia is to deliver the baby. My beautiful baby boy Isaiah was born on January 18, 2009. He was six pounds, eleven ounces and nineteen inches long. He was the most beautiful baby I had ever seen. All was well, my doctor said that Isaiah was healthy and that he was going to be just fine. It was the perfect day, but what I didn’t know was my son was in for the fight of his life, he was sick and no one would believe me. Three days later Isaiah and I were released from Women’s and Children’s Hospital, my husband Shawn, and his mother Ann drove us home from the hospital. When we reached the house all my family was there to meet Isaiah. My father and mother Scott and Debbie, My grandfather and grandmother Harold and Juanita and my brother Davie and his wife Sherry and their three children. Everyone was so thrilled to see and hold Isaiah. As it got later everyone decided to leave and allow us to rest, however my mother Debbie stayed behind to help me with Isaiah. One week had gone by and Isaiah wasn’t sleeping well at all, my mother Debbie was only supposed to stay one night, but she stayed to assist us for the week. Mother was exhausted so she went home after seven days. Three weeks had gone by and Isaiah was getting worse, heShow MoreRelatedThe Movie Bruce Almighty 906 Words   |  4 PagesThe movie â€Å"Bruce Almighty† is an exemplary and metaphorical depiction of the idea of who God is, how God can be interpreted throughout the movie through scenes and characters, and how is God seen in relation to His creation. 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