Lyme, the Silent Killer Essay Example for Free

Lyme, the Silent Killer Essay Lyme disease is disease transmitted by the deer tick also known as the black legged tick. It is caused by an infection called Borrelia Burgdorferi which is a type of bacterium called a spirochete. The deer tick can transmit the spirochetes to humans and other animals causing them to become infected with Lyme disease. Lyme disease first begins as a multi system inflammatory disease which first attacks the skin in the localized stage, then spreads to the joints the nervous system and other organ systems. If the Lyme disease is diagnosed early it can be treated with antibiotics, but it does depend on the progression of the diseases among the patient. Often the tick must be attached to your body for 24 36 hours to spread the bacteria to your blood. The spirochete is injected from the victims skin into the bloodstream establishing itself in various body tissues. After an incubation period of 3 to 32 days, the organism migrates outward in the skin, is spread through the lymphatic system or is disseminated by the blood to different body organs or other skin sites. Lyme disease was first described in 1909 in European medical journals. The first outbreak in the United States occurred in the early 1970s in Old Lyme, Connecticut. An unusually high incidence of juvenile arthritis in the area led scientists to investigate and identify the disorder. In 1981, Dr. Willy Burgdorfer identified the bacterial spirochete organism (Borrelia Burgdorferi) which causes this disorder. Lyme disease is known to be the number one arthropod disease is the United States occurring in 48 of the 50 states and up to 12,000 cases of Lyme disease diagnosed annually. Lyme disease is has three stages which are early localized disease with skin inflammation, early disseminated disease with heart and nervous system involvement, including palsies and meningitis, and the last stage of the disease called later disseminated which causes motor and sensory nerve damage and brain inflammation as well arthritis. The first stage is called Localized Lyme disease and in this early phase of the illness, within days to weeks of the tick bite, the skin around the bite develops an expanding ring of unraised redness. There may be an outer ring of brighter redness and a central area of clearing, leading to a bulls-eye appearance, the rash also has a warm to touch feeling .The first rash seen on the patient is called erythema migrans. The redness of the skin is often accompanied by flu-like symptoms which may include fever, chills, fatigue, muscle and joint pain, swollen lymph nodes and headache. Sometimes these more serious symptoms develop without the person ever having had a rash. The redness resolves, without treatment, in about a month. Weeks to months after the initial redness of the skin, the bacteria spread throughout the body and can begin affecting the joints, heart, and nervous system. The later phases of Lyme disease can affect the heart, and cause inflammation of the heart muscle. This can result in abnormal heart rhythms and heart failure. The nervous system can develop facial muscle paralysis also known as Bells palsy, abnormal sensation due to disease of peripheral nerves which is also known as peripheral neuropathy, meningitis, and confusion. Arthritis, or inflammation in the joints, begins with swelling, stiffness, and pain. Usually, only one or a few joints become affected, most commonly the knees. The arthritis of Lyme disease can look like many other types of inflammatory arthritis and can become chronic. Lyme disease occurs in wooded areas with populations of mice and deer which carry ticks, and can be contracted during any season of the year. The medication used for adults with Lyme disease the antibiotic tetracycline is the drug of choice. Penicillin V and erythromycin have also been used in children. Penicillin V is now recommended for neurological abnormalities. It is not yet clear whether antibiotic treatment is helpful later in the illness when arthritis is the most predominant symptom. Treatment should be started as soon as the rash appears. A clear diagnosis of Lyme disease can be tricky, and often relies on information the patient and through process of elimination the Doctor will be able to out rule other conditions. Lyme disease and its symptoms often mimic many other diseases which target multi body systems such as Chronic Fatigue Syndrome and Multiple Sclerosis. Doctors will perform a specific blood test called Enzyme Linked Immunoabsorbent Assay (ELISA) which can detect antibodies present of Lyme disease. Results of this test may be inaccurate if patients have had antibiotics soon after contracting Lyme disease, or in those who have weakened immune systems. SOURCES 1.American Lyme disease foundation. (2006, April). Retrieved from http://www.aldf.com/lyme.shtml 2.American College of Physicians. (2012). Lyme disease- A patients guide. Retrieved from

History of Indonesia :: essays research papers

Early empires By the time of the European Renaissance, the islands of Java and Sumatra had already enjoyed a thousand-year heritage of civilization spanning two major empires. During the 7th to 14th centuries, the Buddhist kingdom of Srivijaya flourished on Sumatra. Chinese traveller I Ching visited its capital, Palembang, around 670. At its peak, the Srivijaya Empire reached as far as West Java and the Malay Peninsula. Also by the 14th century, the Hindu Kingdom of Majapahit had risen in eastern Java. Gajah Mada, the empire's chief minister from 1331 to 1364, succeeded in gaining allegiance from most of what is now modern Indonesia and much of the Malay archipelago as well. Legacies from Gajah Mada's time include a codification of law and an epic poem. Reasons for the fall of these empires remain obscure. Islam arrived in Indonesia sometime during the 12th century and, through assimilation, supplanted Hinduism by the end of the 16th century in Java and Sumatra. Bali, however, remains overwhelmingly Hindu. In the eastern archipelago, both Christian and Islamic missionaries were active in the 16th and 17th centuries, and, currently, there are large communities of both religions on these islands. Colonial era Beginning in 1602 the Dutch gradually established themselves as rulers of what is now Indonesia, exploiting the fractionalization of the small kingdoms that had replaced Majapahit. The most notable exception was Portuguese Timor, which remained under Portuguese rule until 1975 when it was invaded and occupied, becoming the Indonesia province of East Timor. The Netherlands controlled Indonesia for almost 350 years, excluding a short period of British rule in part of the islands after Anglo-Dutch Java War and the Japanese occupation during World War II. During their rule the Dutch developed the Dutch East Indies into one of the world's richest colonial possessions. During the first decade of the 20th century an Indonesian independence movement began, and it expanded rapidly between the two World Wars. Its leaders came from a small group of young professionals and students, some of whom had been educated in the Netherlands. Many, including Indonesia's first president, Sukarno (1945-67), were imprisoned for political activities. World War II In May 1940 the Netherlands surrendered to Germany (see World War II). The Dutch East Indies declared a state of siege and in July re-directed exports for Japan to the US and Britain. Negotiations with the Japanese aimed at securing supplies of aviation fuel collapsed in June 1941, and the Japanese started their conquest of Southeast Asia in December of that year.

Advantages of Internet for Students

Advantages Of Internet For Students Nevertheless, students and teachers have experienced following 10 advantages of Internet. 1. Assortment of Information Lots of information of different kinds is kept on the web server on the Net. This means that millions web sites include various data in the shape of images and text. On every subject of the planet information can be easily collected by you. For this function, special sites, called search engines can be found on the Internet to search data of each and every subject of the planet. . Online Medical Guidance Several web sites will also be on the Web to obtain details about various conditions. You are able to consult with a cell of on-line physicians to obtain guidance about any medical problem. In addition, lots of material can also be on the Web for research in medical industry. 3. Looking for Jobs You are able to search various kinds of jobs throughout their vacant vacancies are advertised by the world, Most of the organizations/depa rtments around the world, on the web.The search engines will also be employed to search the jobs on the web. You are able to make an application for the necessary work through the Web. 4. Communication You are able to keep in touch with other through Internet all over the world. You could speak by seeing to 1 another; only you’re speaking with your pals in your drawing room. For this function, various services are supplied on the Internet such as; speaking, video conferencing, Email and Internet telephone an such like. 5. InformationThe Web enables students to see the most recent news on a particular topic they’re learning. If they’re learning American politics they may do an information search and discover what is happening on the planet of politics at that very time. It will help them link what they’re understanding how to real life. Additionally, it may keep them thinking about a topic. 6. Online Training The facility is provided by the internet to obt ain an online training. Several web sites of different colleges offer lessons and classes on different subjects or subjects.You may also obtain these classes or lessons in your personal computer. You are able to hear these classes repeatedly and obtain a large amount of understanding. It’s very simple and cheap method to get training. 7. Encyclopedia Occasionally, encyclopedia mightn’t constantly be accessible to individuals and so they might have trouble with in getting the use of the actual guides within the selection. If that’s the case, the encyclopedia of various topics on the Web could be useful. 8. Online Railway and Airplane SchedulesToday, railway and several Airline businesses offer their timing of trains and routes respectively on the web. 9. Online Results Today, all of the training boards and colleges present result on the web. Their results can be watched by the students from any kind of nation or world. 10. Advertisement Today, products are advert ised by most of the commercial organizations through Internet. It’s effective and inexpensive method for the marketing of goods. The services and products could be given lovely and attractive method to the people round the world.

Bond Dissociation Energy Definition

Bond dissociation energy is defines as the amount of energy which is required to homolytically fracture a chemical bond. A homolytic fracture usually produces radical species. Shorthand notation for this energy is BDE,  D0, or  DH °. Bond dissociation energy is often used as a measure of the strength of a chemical bond and to compare different bonds. Note the enthalpy change is temperature dependent. Typical units of bond dissociation energy are kJ/mol or kcal/mol. Bond dissociation energy may be measured experimentally using spectrometry, calorimetry, and electrochemical methods. Key Takeaways: Bond Dissociation Energy Bond dissociation energy is the energy required to break a chemical bond.It is one means of quantifying the strength of a chemical bond.Bond dissociation energy equals bond energy only for diatomic molecules.The strongest bond dissociation energy is for the Si-F bond. The weakest energy is for a covalent bond and is comparable to the strength of intermolecular forces. Bond Dissociation Energy Versus Bond Energy Bond dissociation energy is only equal to bond energy for diatomic molecules. This is because the bond dissociation energy is the energy of a single chemical bond, while bond energy is the average value for all the bond dissociation energies of all bonds of a certain type within a molecule. For example, consider removing successive hydrogen atoms from a methane molecule. The first bond dissociation energy is 105 kcal/mol, second is 110 kcal/mol, third is 101 kcal/mol, and final is 81 kcal/mol. So, the bond energy is the average of the bond dissociation energies, or 99 kcal/mol. In fact, the bond energy doesnt equal the bond dissociation energy for any of the C-H bonds in the methane molecule! The Strongest and Weakest Chemical Bonds From bond dissociation energy, its possible to determine which chemical bonds are strongest and which are weakest. The strongest chemical bond is the Si-F bond. The bond dissociation energy for F3Si-F is 166 kcal/mol, while the bond dissociation energy for H3Si-F is 152 kcal/mol. Th reason the Si-F bond is believed to be so strong is because there is a significant electronegativity difference between the two atoms. The carbon-carbon bond in acetylene also has a high bond dissociation energy of 160 kcal/mol. The strongest bond in a neutral compound is 257 kcal/mol in carbon monoxide. There is no particular weakest bond dissociation energy because weak covalent bonds actually have energy comparable to that of intermolecular forces. Generally speaking, the weakest chemical bonds are those between noble gases and transition metal fragments. The smallest measured bond dissociation energy is between atoms in the helium dimer, He2. The dimer is held together by the van der Waals force and has a bond dissociation energy of 0.021 kcal/mol. Bond Dissociation Energy Versus Bond Dissociation Enthalpy Sometimes the terms bond dissociation energy and bond dissociation enthalpy are used interchangeably. However, the two are not necessarily the same. The bond dissociation energy is the enthalpy change at 0 K. The bond dissociation enthalpy, sometimes simply called bond enthalpy, is the enthalpy change at 298 K. Bond dissociation energy is favored for theoretical work, models, and computations. Bond enthalpy is used for thermochemistry. Note that most of the time the values at the two temperatures are not significantly different. So, even though enthalpy does depend on temperatures, ignoring the effect doesnt usually have a big impact on calculations. Homolytic and Heterolytic Dissociation The definition of bond dissociation energy is for homolytically broken bonds. This refers to a symmetrical break in a chemical bond. However, bonds can break asymmetrically or heterolytically. In the gas phase, the energy released for a heterolytic break is larger than for homolysis. If a solvent is present, the energy value drops dramatically. Sources Blanksby, S.J.; Ellison, G.B. (April 2003). Bond dissociation energies of organic molecules. Accounts of Chemical Research. 36 (4): 255–63. doi:10.1021/ar020230dIUPAC, Compendium of Chemical Terminology, 2nd ed. (the Gold Book) (1997).Gillespie, Ronald J. (July 1998). Covalent and Ionic Molecules: Why Are BeF2 and AlF3 High Melting Point Solids whereas BF3 and SiF4 Are Gases?. Journal of Chemical Education. 75 (7): 923. doi:10.1021/ed075p923Kalescky, Robert; Kraka, Elfi; Cremer, Dieter (2013). Identification of the Strongest Bonds in Chemistry. The Journal of Physical Chemistry A. 117 (36): 8981–8995. doi:10.1021/jp406200wLuo, Y.R. (2007). Comprehensive handbook of chemical bond energies. Boca Raton: CRC Press. ISBN 978-0-8493-7366-4.