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Search results 61 - 70 of 291 matching essays
- 61: Ebola 2
- ... infected with the disease can be properly treated , and the need to perform prompt action to isolate the virus before it disperses (Garrett 192). The Ebola virus is a member of a family of RNA viruses known as filoviruses, which consist of the Marburg virus and four Ebola viruses: Ebola Zaire, Sudan, Reston and Tai are the five different viruses that have been known to cause disease in humans, while Ebola Reston only causes disease in monkeys. Filoviruses, arenaviruses, flaviruses, and bunyaviruses are the viruses responsible for causing viral hemorrhagic fevers. All forms of ...
- 62: An Overview Of Hacking
- ... expensive process. It is estimated that in 1997 a total of $6.3 billion dollars will be spent on computer security. (Lohr, par. 1) A great deal of this will go to protect against computer viruses. A computer virus is a very small program that can clone itself at will, over disks and phone lines, and usually causes some devastating impact on the target, such as deleting files, or even damaging the computer. Just like human viruses, such as AIDS, which changes form constantly to avoid destruction, some computer viruses, called polymorphic viruses, change slightly so that any previous anti-virus software will no longer detect it. This is why there are constantly new virus protection tools and utilities. Viruses aren't the only ...
- 63: Morality and Ethics and Computers
- ... aspect of computers that is surely immoral and unethical is computer crime, which has been on the rise lately. There are many different types of computer crime. Three main types of crimes are making computer viruses, making illegal copies of software, and actually stealing computers. Computer viruses have been around for a decade but they became infamous when the Michelangelo virus caused a scare on March 6, 1992. According to the National Computer Security Association in Carlisle, Pennsylvania, there are 6000 known viruses worldwide and about 200 new ones show up every month.8 These viruses are spread quickly and easily and can destroy all information on a computer's hard drive. Now, people must buy additional ...
- 64: Morality and Ethics and Computers
- ... aspect of computers that is surely immoral and unethical is computer crime, which has been on the rise lately. There are many different types of computer crime. Three main types of crimes are making computer viruses, making illegal copies of software, and actually stealing computers. Computer viruses have been around for a decade but they became infamous when the Michelangelo virus caused a scare on March 6, 1992. According to the National Computer Security Association in Carlisle, Pennsylvania, there are 6000 known viruses worldwide and about 200 new ones show up every month.8 These viruses are spread quickly and easily and can destroy all information on a computer's hard drive. Now, people must buy additional ...
- 65: Gene Therapy 2
- ... of vectors. A vector is a DNA molecule into which a DNA fragment can be cloned and which can replicate in a suitable host organism. The majority of vectors used today are attenuated or modified viruses. "The modified viruses can not replicate in the patient but do retain the ability to efficiently deliver genetic material."9 There are two main modes used to deliver the genes of interest to the patient: non-viral and ... are under investigation. The principle of all these vectors is the packaging of the DNA into the viral capsule by replacing part (or all) of the viral genes. By removing the crucial viral genes, the viruses also loose their pathogenic effect. After the manipulation of the viral genome, the virus will be used to deliver the genetic material by viral infection to the target cell. Retroviruses have a limitation because ...
- 66: The Battle Against AIDS
- ... Cases of AIDS were first identified in 1981 in the United States, but researchers have traced cases to as early as 1959. Millions of AIDS cases have been diagnosed worldwide. AIDS is caused by two viruses that belong to a group called retroviruses. The AIDS virus was isolated by researchers in France in 1983 and researchers in the United States in 1984. The virus became known as HIV-1. In 1985 ... an AIDS virus enters one of these cells, the virus inserts its genes into the cell's reproductive system and uses it to produce more HIV. This infection kills the CD4 cell and spreads AIDS viruses to other CD4 cells, where the process is repeated. HIV can be present in the body for 2 to 12 or more years without producing any outward sign of illness. An infected person can transmit ... The tests for detecting HIV-2 became widely available in 1992. HIV tests determine the presence of antibodies to the AIDS virus. Antibodies are proteins produced by certain white blood cells to react with specific viruses, bacteria, or foreign substances that enter the body. The presence of antibodies to HIV indicates infection with the virus. People with HIV infection are diagnosed as having AIDS when tests indicate that they have ...
- 67: Gene Therapy
- ... of vectors. A vector is a DNA molecule into which a DNA fragment can be cloned and which can replicate in a suitable host organism. The majority of vectors used today are attenuated or modified viruses. "The modified viruses can not replicate in the patient but do retain the ability to efficiently deliver genetic material."9 There are two main modes used to deliver the genes of interest to the patient: non-viral and ... are under investigation. The principle of all these vectors is the packaging of the DNA into the viral capsule by replacing part (or all) of the viral genes. By removing the crucial viral genes, the viruses also loose their pathogenic effect. After the manipulation of the viral genome, the virus will be used to deliver the genetic material by viral infection to the target cell. Retroviruses have a limitation because ...
- 68: The Making Of The Cat
- ... of heat and energy, this soup was able to slowly combine the organic molecules into ever more com- plex forms: first simple amino acids, then organic macromolecules, then single-strand RNA molecules, and finally simple viruses. The only trouble with the soup theory is that is almost definitely wrong! The time required for it to work is statistically greater than the lifetime of the Earth. The time is only statistically greater ... allows them to be easily washed away by the sea, forming a primordial soup not of basic simple mole- cules, but of the far more complex and already evolved RNA macromole- cules and possibly even viruses. Viruses are fundamentally RNA and amino-acid conglomerates with many life-like properties. Although it is open to debate as to whether or not they are themselves alive, viruses are definitely right on the edge: ...
- 69: Genetic Engineering. 2
- ... which is resistant to a particular antibiotic. This now indestructible bacterial pestilence wages havoc on the human body. Genetic engineering is conquering this medical dilemma by utilizing diseases that target bacterial organisms. these diseases are viruses, named bacteriophages, "which can be produced to attack specific disease-causing bacteria" (Stableford 61). Much success has already been obtained by treating animals with a "phage" designed to attack the E. coli bacteria (Stableford 60). Diseases caused by viruses are much more difficult to control than those caused by bacteria. Viruses are not whole organisms, as bacteria are, and reproduce by hijacking the mechanisms of other cells. Therefore, any treatment designed to stop the virus itself, will also stop the functioning of its host cell. ...
- 70: Essay On Hacking
- ... other files. Now, onto hacking. Most people stereotype people simply as "HACKERS," but what they don't know is that there are three different types of computer whizzes. First, there are hackers. Hackers simply make viruses and fool around on the internet and try to bug people. They make viruses so simple. The get a program called a virus creation kit. This program simply makes the virus of beholders choice. It can make viruses that simply put a constant beep in you computer speakers or it can be disastrous and ruin your computers hard-drive. Hackers also go onto chat rooms and cause trouble. Chat rooms are simply ...
Search results 61 - 70 of 291 matching essays
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