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Free research papers and essays on topics related to: viruses

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  • Biological Viruses: All Time Enemies - 1,170 words
    Biological Viruses: All Time Enemies First came fever. Then Hamid Mansaray, a young nurse's aide at a remote African hospital, began to hemorrhage. Blood erupted from his nose and mouth. It burst out of capillaries beneath his skin and eyes. By the time I reached the village of Panguma in Serria Leone, Mansaray lay isolated in a special ward. Doctors had diagnosed an obscure illness called Lassa fever. Its cause was a virus, an infective agent so small that 100,000 of them clumped together would still scarcely be visible. Viruses are little more than bundles of genes - strands of DNA or RNA, the molecules that carry the blueprints for all life. Yet viruses are far from simple. They invade ar ...
    Related: biological, white blood cells, yellow fever, common cold, contracts
  • Biological Viruses: All Time Enemies - 1,132 words
    ... a rash of fluid-filled blisters that begin as red spots covering most of the body and the inside of the mouth. The disease is dangerous to newborns, to people first infected in adulthood, and to those in whom the virus remains dormant in nerve cells, erupting as the more painful and sometimes chronic zoster (shingles) later in life. VZV is a member of the Herpes virus family, which also includes the causative agents of infectious mononucleosis, roseola, and oral and genital herpes (Microsoft Encarta 96 Encyclopedia). An extremely contagious viral disease, chiefly of children, characterized by early fever, an eruption of papules and vesicles, and mild constitutional disturbances. In most ...
    Related: biological, hepatitis b, drinking water, microsoft corporation, tube
  • Computer Viruses - 550 words
    Computer Viruses Computer Viruses A computer virus is a relatively small program that attaches itself to data and program files before it delivers its malicious act. There are many distinct types of viruses and each one has a unique characteristic. Viruses are broken up into to main classes, file infectors and system or boot-record infectors. A file infector attaches to ordinary programs usually affecting .COM and .EXE files. These two files are subject to infection though some can infect any program from which execution is requested. On the other spectrum, system or boot-record infectors infect executable codes found in certain system areas on a disk, which are not ordinary files. Not only ...
    Related: computer system, computer systems, computer virus, computer viruses, viruses
  • Computer Viruses - 1,281 words
    Computer Viruses Almost every End-user in the world has heard of computer viruses and/or has had one at one point in time. Dont worry if you havent heard about them, you wont find it in your bloodstream. Unfortunately you may find one in your computer memory or disk storage. Some may be as benign as the common cold and others as deadly to your hard drive as the Ebola virus . - 1 -What is a Computer Virus? ~ Usually defined as a malicious code of computer programming it is actually just another software, only written with not so noble intentions. ~ A computer virus is designed to install, reproduce itself and cause damage to computer files and data without the users knowledge or permission. ...
    Related: boot sector viruses, computer programming, computer running, computer security, computer virus, computer viruses, viruses
  • Computer Viruses - 789 words
    Computer Viruses The quote "The only truly secure system is one that is powered off, cast in a lead-lined room with armed guards and even then I have my doubts."(E.H. Spafford) of this report will explain how computer viruses have affected on society and the security of personal computers. There literally hundreds of viruses circulating for personal computers and many anti-viral packages that claim to remove the code from your computer. Some viruses are polymorphic; that is, they change with each infection in an attempt to avoid detection by anti-virus programs. As quickly as someone writes an anti-virus program, someone else writes a new virus that hides more successfully than in the past. ...
    Related: computer virus, computer viruses, computer world, personal computer, viruses
  • Computer Viruses - 1,755 words
    Computer Viruses In the past decade, computer and networking technology has seen enormous growth. This growth however, has not come without a price. With the advent of the "Information Highway", as its coined, a new methodology in crime has been created. Electronic crime has been responsible for some of the most financially devastating victimizations in society. In the recent past, society has seen malicious editing of the Justice Department web page (1), unauthorized access into classified government computer files, phone card and credit card fraud, and electronic embezzlement. All these crimes are committed in the name of "free speech." These new breed of criminals claim that information s ...
    Related: computer crime, computer networks, computer program, computer systems, computer virus, computer viruses, personal computer
  • Computer Viruses - 463 words
    Computer Viruses A computer virus is an illegal and potentially damaging computer program designed to infect other software by attaching itself to any software it contacts. In many cases, virus programs are designed to damage computer systems maliciously by destroying or corrupting data. If the infected software is transferred to or accessed by another computer system, the virus spreads to the other system. Viruses have become a serious problem in recent years, and currently, thousands of known virus programs exist (Reed 85-102). Three types of viruses are boot sector virus, file virus, and Trojan horse virus. A boot sector virus infects the boot program used to start the system. When the in ...
    Related: computer program, computer security, computer system, computer systems, computer virus, computer viruses, viruses
  • Do Viruses Help - 586 words
    Do Viruses Help? HOW ABOUT VIRUSES? Just like bacteria viruses are one of the microbes that are winning the match against the humans. Viruses were the toughest one to tackle for the scientist. The shape, contents and their protective shields were the most challenging part of the fight. There are many ways one can treat cancer, but for AIDS doctors prescribe a cocktail of drugs in which some are enzyme inhibitors, protein inhibitors and while some are RNA inhibitors. This is not it in the cocktail there is more to the list. As the technology increases and the knowledge of our scientist about the DNA, RNA, Viruses, Bacteria, and other interesting things we are a step closer to the destruction ...
    Related: viruses, life support, herpes simplex, cell division, pharmaceutical
  • Types Of Computer Viruses - 1,477 words
    Types Of Computer Viruses A computer virus is a program that is designed to damage your computer, programs, and files. Like a virus in a living thing, a computer virus can spread if it is not removed. Some viruses are more dangerous than others. One of the most common places for a computer virus to appear is on a file found on the Internet or attached to an E-mail. For example, you may have a virus that just pops a message box on your screen, and then the virus is disabled, or you can have a virus that deletes half of your hard drive. Computer viruses didnt really exist until the mid 1980s. The first computer viruses were created in university labs to demonstrate how much of a threat the vic ...
    Related: boot sector viruses, computer virus, computer viruses, viruses, microsoft word
  • Viruses - 301 words
    Viruses The word virus means "poi-son" in Latin. Viruses are submicro-scopic intracellular parasites that consist of either RNA or DNA, and a protective coat of protein. It has caused countless diseases in vari-ous organisms. The term virus was first used in the 1890s to describe agents that caused diseases that were smaller than bacteria. The ex-istence of viruses was established in 1892, when Russian scientist Dimity I. Ivanovsky discovered microscopic particles later known as the tobacco mosaic virus. Over the years, scientists have debated whether viruses are alive. Some scientists argue that the virus is lifeless. On the other hand, other scientists argue that viruses are lifeforms and ...
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  • A Parasite Is Defined As An Organism That Lives In Or On Another Organism, Called A Host 2 If The Parasite Has The Capacity T - 1,538 words
    A parasite is defined as an organism that lives in or on another organism, called a host (2). If the parasite has the capacity to cause disease in the host then the parasite is called a pathogen. Disease in the host is caused by the infection of the parasite. The interaction between the host and parasite is complex. Both the pathogen and the host strive for survival in some of the cases. The pathogen divides within or on the host in an attempt to keep its species alive while the hosts defense mechanisms simultaneously attempt to eliminate the pathogen. The extent of the battle for survival varies depending on the relationship. This paper discusses the disease state of Chlamydia; how the orga ...
    Related: capacity, host, organism, parasite, upper saddle
  • Abstract On Rose Diseases - 2,112 words
    ... by 1970, most of the garden roses in the United States were infected. Since then, heat therapy programs have been initiated at the Oregon State University and the University of California at Davis, as well as by Bear Creek (parent company of Jackson & Perkins Roses and Armstrong Roses). The Oregon State program is now nearly defunct. Some commercial rose nurseries have made use of those programs and now offer virus-free plants for sale. However, many nurseries have not made any attempt to provide healthy plants, and a large percentage of the roses grown and sold in Florida are infected. Florida nurseries using Fortuniana as a rootstock are at a particular disadvantage, since scion-source ...
    Related: abstract, washington state university, state university, washington state, sending
  • Aging Theories - 1,767 words
    ... ter a certain number of divisions, the clock genes are triggered and may produce proteins responsible for cell destruction (Keeton, 1992, 50). Cellular Aging In 1961, a discovery made by Leonard Hayflick showed that normal, diploid cells from such continually Areplaced@ parts of the body as skin, lungs, and bone marrow, divide a limited number of times. Although the cells stop dividing at the point just before DNA synthesis, they do not die. The longer-lived the species, the more divisions the cells undergo. As the age of an individual increases, the number of potential divisions decreases (Ricklefs and Finch, 1995, 29). This discovery was found using fibroblasts, or cells found in the c ...
    Related: aging, aging process, bone fracture, concise encyclopedia, testosterone
  • Aids - 1,564 words
    Aids Matchmaker.com: Sign up now for a free trial. Date Smarter! AIDS "Somewhere among the million children who go to New York's publicly financed schools is a seven-year-old child suffering from AIDS. A special health and education panel had decided, on the strength of the guidelines issued by the federal Centers for Disease Control, that the child would be no danger to his classmates. Yet, when the school year started on September 9th, several thousand parents in two school districts in the borough of Queens kept their children at home. Fear of plague can be as pernicious, and contagious, as the plague itself(Fear of dying 1)." This article was written in 1985. Since then much has been fou ...
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  • Aids - 1,527 words
    ... AIDS from handshakes, hugs, coughs, sneezes, sweat, tears, mosquitoes, or other insects, pets, eating food prepared by someone else, or just being around an infected person. A person can't get it from sharing a cigarette, cigar, or pipe, drinking from the same fountain, or from someone spitting on him or her. A person also can't get it from using the same swimming pools, toilet seats, phones, computers, straws, spoons, or cups. Although the virus has been found in saliva, medical opinion states there is no evidence of contamination through wet kissing(What are HIV/AIDS 1). HIV is not spread through the air or water, unlike many other viruses(HIV/AIDS 2). No one has ever caught AIDS by go ...
    Related: aids, protease inhibitors, local government, state and local government, isolated
  • Aids - 1,146 words
    AIDS Being one of the most fatal viruses in the nation, AIDS (Acquired Immunodeficiency Syndrome) is now a serious public health concern in most major U.S. cities and in countries worldwide. Since 1986 there have been impressive advances in understanding of the AIDS virus, its mechanisms, and its routes of transmission. Even though researchers have put in countless hours, and millions of dollars it has not led to a drug that can cure infection with the virus or to a vaccine that can prevent it. With AIDS being the leading cause of death among adults, individuals are now taking more precautions with sexual intercourse, and medical facilities are screening blood more thoroughly. Even though HI ...
    Related: aids, aids epidemic, latin america, hepatitis b, pneumonia
  • Aids - 1,140 words
    ... rom a few days to several weeks and is associated with fever, sweats, exhaustion, loss of appetite, nausea, headaches, soar throat, diarrhea, swollen glands, and a rash on the torso. Some of the symptoms of the acute illness may result from HIV-1 invasion of the central nervous system. In some cases the clinical findings have correlated with the presence of HIV-1 in the cerebrospinal fluid. Symptoms disappear along with the rash and other sings of acute viral disease. When the blood test for HIV-1 antibodies become available, researchers demonstrated the lymphadenopathy was a frequent consequence of infection with the virus. Scientist do not know what causes the wasting syndrome, but som ...
    Related: aids, immune system, human immunodeficiency, recent studies, regulation
  • Aids And Retroviruses - 1,241 words
    AIDS And Retroviruses Today, tens of millions of people around the world are going to die young because they are infected by HIV, the virus that causes AIDS. The primary AIDS virus is HIV-1, which can be spread via sexual intercourse or drug use (activities, which result in body fluid exchange like blood and semen). HIV can also be passed from mother to child and can also be acquired during blood transfusions. AIDS, Acquired Immune Deficiency Syndrome, is a virus that causes a loss of protection against disease causing microorganisms. People who are infected by AIDS usually have a decline in the number of T-cells that are responsible for their immune system. Because the virus reproduces by a ...
    Related: aids, immune system, deficiency syndrome, fact sheet, mediate
  • Aids And Retroviruses - 1,286 words
    ... AP) to a cellular receptor. Receptor molecules can be proteins (glycoproteins), or the sugar residues present on glycoproteins or glycolipids. Some complex viruses, for example, Poxviruses and Herpesviruses may have more than one receptor-binding protein, therefore, there may be alternative routes of uptake into cells. The expression or absence of receptors on the surface of cells largely determines the tropism of most viruses, that is, the type of cell in which they are able to replicate.  Penetration Unlike attachment, viral penetration is an energy-dependent process; that is, the cell must be metabolically active for this to occur. Three mechanisms may be involved:  Tr ...
    Related: aids, genetic code, life cycle, immune system, replication
  • Aids Conspricay Is Aids Biological Warfare - 3,107 words
    Aids Conspricay - Is AIDS Biological Warfare? Refinance now homeowner even if you have bad credit. 185 loc Aids Conspricay - Is AIDS Biological Warfare? The following is a complete verbatim transcription from a recent broadcast of "Network 23", a program shown on a local Los Angeles Public Access Cable Channel. Good evening, I'm Michel Kassett. This is Network 23. A couple of weeks ago we had a program on the subject of AIDS, addressing the question of whether AIDS-the AIDS virus-was created by the government; and I'm sure that some people were quite shocked by what they heard. We spent that entire program relating to you the evidence of a very substantial amount of factual evidence which su ...
    Related: aids, aids research, biological, biological warfare, warfare
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