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4,532 Essays on Science. Documents 1,471 - 1,500

  • Escherichia Coli 0157:h7

    Escherichia Coli 0157:h7

    Escherichia coli 0157:H7 OR (E. coli) is a food born pathogen that can cause serious illness or if left untreated can cause death. One of the obvious symptoms of E. coli is bloody diarrhea although not all forms of E coli have the same symptoms. The main toxins all strains of E. coli produce are called shiga toxins, the toxins alone are not able to make E. coli pathogenic it needs the presence of other

    Essay Length: 563 Words / 3 Pages
    Submitted: December 15, 2009 By: Victor
  • Escherichia Coli and Staphylococcus Albus

    Escherichia Coli and Staphylococcus Albus

    Escherichia coli and Staphylococcus albus Some bacteria’s require a certain amount of light in order to function properly and there fore survive. Escherichia coli is found in the gut and intestines of mammals. Staphylococcus albus is generally a skin dwelling bacteria Aim: To test whether the amount and type of light that the bacteria’s E.coli and S.albus are subject to causes changes in their growth rates and habits. To test whether the growth rates and

    Essay Length: 518 Words / 3 Pages
    Submitted: March 22, 2010 By: Edward
  • Essay on Oxygen Debt and the Beneficial Effects of Exercise

    Essay on Oxygen Debt and the Beneficial Effects of Exercise

    During muscular exercise, blood vessels in the muscles dilate and blood flow is increased in order to increase the available oxygen supply, to allow the muscles required to function properly. Up to a point, the available oxygen is sufficient to meet the energy needs of the body. However, when muscular exertion is very great, oxygen cannot be supplied to muscle fibres fast enough, and the aerobic breakdown of pyruvic acid cannot produce all the ATP

    Essay Length: 3,197 Words / 13 Pages
    Submitted: January 28, 2010 By: Mike
  • Establishments of Professor James Quintiere ( Fire Researcher)

    Establishments of Professor James Quintiere ( Fire Researcher)

    Table of contents: Table of contents: 1 Abstract: 2 Acknowledgment: 2 Introduction 3 Selected Papers: 4 Flash over and instabilities in fire behaviour. 4 Estimating room temperatures and likelihood of flashover using fire test data correlations 6 Conclusion 9 References 10 Appendix I 12 Abstract: The contribution of Professor J. G. Quintiere into the field of fire protection is introduced and discussed, and as it is difficult to evaluate his whole contribution into the field

    Essay Length: 271 Words / 2 Pages
    Submitted: April 18, 2010 By: Yan
  • Ethanol


    Ethanol Ethanol is easily soluble in water in all proportions with a slight overall decrease in volume when the two are mixed. Absolute ethanol and 95% ethanol are themselves good solvents, somewhat less polar than water and used in perfumes, paints and tinctures. Other proportions of ethanol with water or other solvents can also be used as a solvent. Alcoholic drinks have a large variety of tastes because various flavor compounds are dissolved during brewing.

    Essay Length: 564 Words / 3 Pages
    Submitted: December 31, 2009 By: Victor
  • Ethanol


    Today, renewable energy sources are commonly used to replace fossil fuels due to the lacking of oil, gas, etc. An alternative energy source is ethanol (C2H5OH). It is an alcohol fuel manufactured by fermentation and distillation of crops that are high with starch and sugar, such as grains, sugarcane (most commonly used), corn, and fruit. Other names for ethanol are ethyl alcohol, drinking alcohol, and grain alcohol. It can also be made from trees, grasses,

    Essay Length: 351 Words / 2 Pages
    Submitted: April 24, 2010 By: Mike
  • Ether Is Dipole

    Ether Is Dipole

    Ether is dipole Cheng There are four different types of force in nature: electric force, gravitational force, big gravitational force, and magnetic force. These four different types of forces and the entire physical phenomenon in these forces are related to the characteristics of the dipole moment of the smallest unit energy particle Ў°Tei0/etherЎ±. This smallest unit energy particle Tei0/ether is continuously radiated from all substances. From study in radiation of black body, it indicated that

    Essay Length: 1,763 Words / 8 Pages
    Submitted: December 8, 2009 By: Mike
  • Ethernet


    Ethernet ist eine rahmenbasierte Computer-Vernetzungstechnologie fьr lokale Netze (LANs). Sie definiert Kabeltypen und Signalisierung fьr die Bitьbertragungsschicht sowie Paketformate und Protokolle fьr die Medienzugriffskontrolle (Media Access Control, MAC)/Sicherungsschicht des OSI-Modells. Ethernet ist weitestgehend in der IEEE-Norm 802.3 standardisiert. Es wurde ab den 1990ern zur meistverwendeten LAN-Technologie und hat alle anderen LAN-Standards wie Token Ring, FDDI und ARCNET verdrдngt. Ethernet kann die Basis fьr Netzwerkprotokolle, wie z.B. TCP/IP, AppleTalk oder DECnet bilden. Ethernet mit TCP/IP-Protokollstapel Anwendung

    Essay Length: 253 Words / 2 Pages
    Submitted: April 22, 2010 By: Anna
  • Ethical Dilemmas

    Ethical Dilemmas

    There are many ethical dilemmas/cases throughout history, today I would like to address two issues/dilemmas that I believe have impacted and helped reshape our stances upon medical ethics. The first issue in which I would like to address to Physician Assisted Suicide or sometimes referred to as PAS. Many people have varied viewpoints on this topics ranging from patient suffering, patient rights to patient-physician trust. This point has been battled over and over again by

    Essay Length: 759 Words / 4 Pages
    Submitted: March 22, 2010 By: Mikki
  • Ethics


    Cloning, is it the thing of the future? Or is it a start of a new generation? To some, cloning could give back a life. A life of fun, happiness, and freedom. For others it could mean destruction, evil, or power. Throughout this paper, you the reader, should get a better concept of cloning, it's ethics, the pro's and con's, and the concerns it has brought up. You will hear the good of what cloning

    Essay Length: 1,807 Words / 8 Pages
    Submitted: May 30, 2010 By: Yan
  • Ethics and Policies

    Ethics and Policies

    Ethics and Policies Ethics definition Ethics in managements is concerned with those parts of organisational, operational, occupational and professional conduct that relate to absolute standards and moral principals. More generally, it is concerned with human character and conduct, the distinction between right and wrong, and the absolute duties and obligation that exist in all situation. It is more likely that consumer to use the organisation that they can trust and have confidence in it.

    Essay Length: 2,825 Words / 12 Pages
    Submitted: January 10, 2010 By: Stenly
  • Ethics of Organ Transplants

    Ethics of Organ Transplants

    An organ transplant is the moving of a whole or partial organ from one body to another for the purpose of replacing the recipient’s failing or damaged organ. Organ donors can be living or deceased. The sources of organ transplants can be from individuals over the age of 18 who indicate their desire to be an organ donor by signing a donor card or telling their family members. Relatives can also donate a deceased family

    Essay Length: 650 Words / 3 Pages
    Submitted: May 28, 2010 By: Jack
  • Ethics of Xenotransplantion

    Ethics of Xenotransplantion

    With the transplant waiting list growing every day because of a lack of human organ donors, there is much talk of xenotransplantation (the use of animal organs and tissues for transplantation in human) among the scientific community. With the many technological and medical advances, it is quite possible to use organs, or parts of organs to save a life. There have been debates back and forth whether or not this is considered an ethical

    Essay Length: 612 Words / 3 Pages
    Submitted: February 27, 2010 By: Jessica
  • Ethology - a Study in Animal Behavior and the Complexity of Their Action

    Ethology - a Study in Animal Behavior and the Complexity of Their Action

    Ethology: A Study in Animal Behavior and the Complexity of Their Action A Study in Animal Behavior Hierarchy Among Animal Species Ethology, the study of animal behavior is still a new frontier for scientists (Freedman, 1970). Ethology, a combination of evolution, ecology, physiology, genetics and psychology, has just come about within the last two decades (Raven, 1999). Animals are a vital component in the history of the world. For instance, the Bible mentions some 100

    Essay Length: 2,189 Words / 9 Pages
    Submitted: April 10, 2010 By: Max
  • Euclid


    Euclid also known as Euclid of Alexandria, was a Greek mathematician who flourished in Alexandria, Egypt, almost certainly during the reign of Ptolemy 1 between 323 and 283 BC. Neither the year nor the place of his birth has been established, and the circumstances of his death remain a mystery. Little is known about Euclid other than his writings, the little information known about Euclid comes from commentaries by Proclus and Pappus of Alexandria. Euclid

    Essay Length: 342 Words / 2 Pages
    Submitted: May 2, 2010 By: Tasha
  • Euclid of Alexandria

    Euclid of Alexandria

    Euclid Of Alexandria may be the best-known mathematician of the world, he is best known for his work on mathematics The Elements. The fact that his work has survived so long, 2000 years in fact, is a tribute to his mathematical genius, however very little of him is known. Three theories abound as to the true nature of this historical figure. Not all historians agree that Euclid was in fact a historical figure, some argue

    Essay Length: 557 Words / 3 Pages
    Submitted: April 7, 2010 By: Andrew
  • Eugenics


    The eugenics movement began in the 20th century by a man named Francis Galton. As the cousin of Charles Darwin, Galton believed that eugenics was a moral philosophy to improve humanity by encouraging the ablest and healthiest people to have more children (Carlson). This Galtonian ideal of eugenics is often thought of as positive eugenics. Eugenics can be defined as the outgrowth of human heredity aimed at “improving” the quality of the human stock (Allen

    Essay Length: 1,952 Words / 8 Pages
    Submitted: December 8, 2009 By: Mikki
  • Eugleeena


    A. Introduction Phototaxis is the movement of an organism towards or away from a light source. In this experiment the phototaxis of the live specimen, Euglena will be observed. The purpose is to find whether the Euglena will present negative or positive phototaxis when exposed to a beam of light after being subjected to darkness. Would the chloroplasts in the Euglena have an effect on the specimen’s phototaxis and overall nature or movement? By observing

    Essay Length: 287 Words / 2 Pages
    Submitted: February 20, 2010 By: Top
  • Euthanaisa


    Euthanasia I became curious about this topic a couple of years back, my mother and I were watching 60 minutes and heard something about legalized killings. It caught our attention immediately, so we watched the excerpt about Dr. Kevorkian. We saw the process of euthanasia, it didn’t seem a too terrible way to die; compared to the suffering of the patients undergoing euthanasia. Then the topic came up during a random discussion while talking to

    Essay Length: 2,118 Words / 9 Pages
    Submitted: January 2, 2010 By: Tasha
  • Euthanasia


    An Argument for Euthanasia Euthanasia is defined as, “The act or practice of putting to death painlessly a person suffering from an incurable disease.” Euthanasia can be traced back as far back as the ancient Greek and Roman civilizations. It was sometimes allowed in these civilizations to help others die. Voluntary euthanasia was approved in these ancient societies. Today, the practice of euthanasia causes great controversy. Both pro-life groups and right-to-die groups present arguments for

    Essay Length: 2,011 Words / 9 Pages
    Submitted: January 23, 2010 By: Fatih
  • Euthanasia - Keep It Illegal

    Euthanasia - Keep It Illegal

    Euthanasia is defined as "a painless killing, especially to end a painful and incurable disease; mercy killing". It is one of society's most widely and hotly debated moral issues. This topic has pained and exhausted the courts in several countries throughout the world, for too long, questioning the ethics and morality of the issue. Euthanasia must not be legalized in Canada for many moral and medical reasons. Firstly, the legalization of euthanasia has proved

    Essay Length: 435 Words / 2 Pages
    Submitted: January 7, 2010 By: Wendy
  • Eutrophication


    Introduction Eutrophication is an increase in the amount of plant nutrients in a body of water(Ford-2000). A Eutorhication process that takes a long period of time to occur. It involves the transformation of a new lake and an old one. Because it has clear water and low nutrient content the young lake is called oligotrophic, and the older lake is different in that it is murky water and has a high level of nutrient, which

    Essay Length: 1,161 Words / 5 Pages
    Submitted: March 28, 2010 By: Vika
  • Evaluating the Risk of Malathion

    Evaluating the Risk of Malathion

    Evaluating the Risk of Malathion The city of Genericville is the home to many species and has become a tourist attraction because of the beauty in the natural circle of life that can be experienced here. Unfortunately, the growing problem with mosquitoes and the spread of the West Nile Virus threatens the livelihood of Genericville’s citizens, and the survival of the wildlife here. A proposal to eradicate the problem is the application of an insecticide

    Essay Length: 331 Words / 2 Pages
    Submitted: January 14, 2010 By: Jack
  • Evaluation of Hicrome Coliform Agar for the Detection and Enumeration Total Coliform and E.Coli from Poultry Feed and Water Samples

    Evaluation of Hicrome Coliform Agar for the Detection and Enumeration Total Coliform and E.Coli from Poultry Feed and Water Samples

    EVALUATION OF HICROME COLIFORM AGAR FOR THE DETECTION AND ENUMERATION TOTAL COLIFORM AND E.coli FROM POULTRY FEED AND WATER SAMPLES Thulasi Rajkumar, Sharon MacDonald, R. Kannan, R. Suresh Kumar and CN.Ramchand Customer Laboratory Services Kemin Nutritional Technologies (I) Pvt. Ltd., No: 39, The Trapezium, Second Floor, Nelson Manickam Road, Chennai-600 029 Tamil Nadu, INDIA ABSTRACT The purpose of this study was to examine the use of Hicrome Coliform Agar medium for isolation and enumeration of

    Essay Length: 638 Words / 3 Pages
    Submitted: December 4, 2009 By: Kevin
  • Evidence Based Practice

    Evidence Based Practice

    Student Number: C1560272Module Code: NR3122 SCHOOL OF HEALTHCARE SCIENCES Assessment Front Sheet This sheet must be used as the first page of all work submitted Student ID number: C1560272 Module code: NR3122 Module name: Evidence-Based Nursing Practice. Declared word count: 3495 words Summative work must be submitted via Learning Central by 4pm on the due date Students are required to keep a copy of all work submitted ________________________________________________________________ I confirm that the material contained

    Essay Length: 5,120 Words / 21 Pages
    Submitted: May 19, 2017 By: aysha.alshibli
  • Evidence of Evolution

    Evidence of Evolution

    Basilosaurids and dorudontids lived in the late Eocene, approximately 35 and 41 million years ago. They are mainly known from the eastern United States and from Egypt, but were probably worldwide in their distribution. Basilosaurids were enormous (possibly up to 60 feet long) and had snake-like bodies. They had a tailfluke, but it is not clear whether that was the main propulsive organ. Dorudontids were proportionally more like dolphins. Both basilosaurids and dorudontids had complete

    Essay Length: 1,540 Words / 7 Pages
    Submitted: March 13, 2010 By: Fonta
  • Evolution


    The first exhibit that was viewed upon entering the museum was the dino zone. There, I observed several dinosaurs, but the most noted dinosaur was the Tyrannosaurus Res (T. Rex). The T. Rex that I observed in detail was Sue. Sue was auctioned and bought by the museum. Most notably, Sue’s skull is over 5 and a half feet tall. If one were to study the size of the forearm, her forearms are relatively short

    Essay Length: 1,439 Words / 6 Pages
    Submitted: November 9, 2009 By: Fonta
  • Evolution


    Theistic Evolution is one of three major origin-of-life views, the other two being Atheistic Evolution, commonly known as Darwinian Evolution, and Special Creation. Atheistic Evolution says that there is no God and that life can and did emerge naturally from preexisting non-living building blocks under the influence of natural laws. Special Creation says that God created life, either from scratch or from preexisting materials. Theistic Evolution says one of two things: That, while there is

    Essay Length: 602 Words / 3 Pages
    Submitted: November 16, 2009 By: Andrew
  • Evolution


    The majority of people in this world believe that a spiritual being created earth. In fact, "most religions and cultures believe the universe was created by a 'creative hand,' either a sky god or some other physical object" (Encarta 1). Think of it, as a trial to see which will win, creation or evolution. It has been the most argued debate in all of history, but creationism is more logical than evolution. To first understand

    Essay Length: 917 Words / 4 Pages
    Submitted: December 22, 2009 By: Anna
  • Evolution


    Evolution Evolution, a process of change through time, is what links together the enormous diversity of the living world. A lot of evidence is present that indicates that the earth has had a very long history and that all living things arose in the course of that history from earlier, more simpler forms. In other words, all species have descended from other species and all living things share common ancestors in the past. Basically, organisms

    Essay Length: 2,685 Words / 11 Pages
    Submitted: December 29, 2009 By: Edward
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