Chart and diagram slides for powerpoint - beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects our new crystalgraphics chart and diagram slides for powerpoint is a collection of over 1000 impressively designed data-driven chart and editable diagram s guaranteed to impress any audience. Introduction to viruses if you're seeing this message, it means we're having trouble loading external resources on our website if you're behind a web filter, please make sure that the domains kastaticorg and kasandboxorg are unblocked. Any computer connected to the internet faces a daunting range of electronic threats perhaps the biggest single threat to any computer is the humble software bug seemingly innocuous programming. Microscopic organisms, commonly known as microorganisms or microbes, are found all around us and even inside our bodies the category 'microbes' includes a massive range of organisms including bacteria, fungi, viruses, algae, archaea and protozoa. Viruses used to be spread when people shared floppy disks and other portable media, now viruses are primarily spread through email messages unlike worms, viruses often require some sort of user action (eg, opening an email attachment or visiting a malicious web page) to spread.
What is a computer virus a computer virus is a special kind of computer program which: spreads across disks and networks by making copies of itself, usually surreptitiously. Introduction to microbiology theory an initial aim of all microbiologists is the reproducible growth of their microbial cultures, no matter whether the microorganisms are of natural origin or have been genetically engineered by man. Viruses with the exception of newly discovered prions, viruses are the smallest agents of infectious disease most viruses are exceedingly small (about 20 - 200 nanometers in diameter) and essentially round in shape. Introduction to viruses lecture topics - 1 what is a virus definition structure and replication human virus infections treatment antivirals vaccines lecture topics - 2 immunity to viruses cell-mediated humoral role of complement vaccination against viruses inactivated vaccines live vaccines interferon definition of a virus definition of a virus virion structure virion morphology simple.
The real name for viruses is self-propagating code, but by analogy with the field of medicine, the name virus has ben given to them the effects of a virus may range from simply displaying a ping-pong ball ricocheting across the screen to wiping out data, which is the most destructive kind of. Introduction to the viruses in 1898, friedrich loeffler and paul frosch found evidence that the cause of foot-and-mouth disease in livestock was an infectious particle smaller than any bacteria. An introduction to virus coding101hacker an introduction to virus coding @echo off :loop start call fkbat goto loop now copy paste the above code in a notepad and save it as fkbat. Watson and crick noted that the size of a viral genome was insufficient to encode a protein large enough to encapsidate it and reasoned, therefore that a virus shell must be composed of multiple, but identical subunits. There are a couple of different types of computer viruses: boot sector viruses, parasitic viruses, multi-partite viruses, companion viruses, link viruses and macro viruses these classifications take into account the different ways in which the virus can infect different parts of a system.
This video lecture, part of the series principles of microbiology with heidi bulfer by prof , does not currently have a detailed description and video lecture title if you have watched this lecture and know what it is about, particularly what biology topics are discussed, please help us by commenting on this video with your suggested description and title. Foodborne illnesses are infections or irritations of the gastrointestinal (gi) tract caused by food or beverages that contain harmful bacteria, parasites, viruses, or chemicals the gi tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus common symptoms of. This hd dramatic video choreographed to powerful music introduces the viewer/student to the virus it is designed as a trailer to be shown by biology teachers in middle and high school and. An introduction to infectious diseases arm yourself with scientific facts about bacterial infections, viruses, vaccines, and more in this engaging course by an award-winning professor and physician.
Slide set: introduction to viruses viruses are submicroscopic particles that can be seen only with a powerful electron microscope they are not cells, but consist of genetic material, enclosed in a protective layer of protein. A virus is an extremely small infectious agent that is metabolically inert and only replicates in living hosts, while the infective form of a virus that exists outside of its host is known as a. Viruses are not organisms in the strict sense of the word, but reproduce and have an intimate, if parasitic, relationship with all living organisms explore the structure of a virus with our three-dimensional graphics. Introduction to hiv/aids is the last stage in a progression of diseases resulting from a viral infection known as the human immunodeficiency virus (hiv or aids virus) the diseases include a.
What are viruses viruses are very small (submicroscopic) infectious particles (virions) composed of a protein coat and a nucleic acid core they carry genetic information encoded in their nucleic acid, which typically specifies two or more proteins. Viruses survive by injecting their genetic material into living cells with the consequence that the biochemical machinery of the host cell is subverted from serving its own needs to serving the needs of the virus during this process the viral genome often integrates itself. Introduction to viruses chapter exam instructions choose your answers to the questions and click 'next' to see the next set of questions you can skip questions if you would like and come back to.
Introduction to azure security 11/21/2017 30 minutes to read contributors all in this article overview we know that security is job one in the cloud and how important it is that you find accurate and timely information about azure security. Viruses may cause chronic, persistent infection with continuous viral replication in the face of an immune response examples include hiv, hepatitis b virus and hepatitis c virus.
Hepatitis a virus (hav), hepatitis b virus (hbv) and hepatitis c virus (hcv) infect liver cells—called hepatocytes—that provide the best conditions for these viruses to reproduce in response to the infection, the body's immune system targets the liver, causing inflammation (hepatitis. Introduction to virology a virus is an obligate intracellular parasite containing genetic material surrounded by protein virus particles can only be observed by an electron microscope introduction to virology the classification of viruses is based on the type of nucleic acid contained within rna viruses---also known as a retrovirus dna viruses. Start studying chapter 6: an introduction to viruses learn vocabulary, terms, and more with flashcards, games, and other study tools.