Science
The scientific world contains a wealth of knowledge that enables mankind to live the way it does. EssaysForStudent.com can help you close the gaps in your knowledge.
4,610 Essays on Science. Documents 2,041 - 2,070
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Heroin
Heroin is a drug of extremes. For many people it is the most feared drug, while for others its powerful “high” offers the most dramatic way of escaping the cares and boredom of everyday life. It is the drug that immediately springs to mind when people talk about dependence and it forms the backbone of drug-treatment programmes in Britain and many other countries. Just why do people take a drug like heroin, if is has
Rating:Essay Length: 403 Words / 2 PagesSubmitted: December 19, 2009 -
Herpes Simplex Virus
Medical Presentation Report Herpes Virus HSV-1 Introduction Herpes simplex is a virus that can cause painful blisters and sores on the skin. The virus has two types, herpes simplex virus 1 or the herpes virus 2. More commonly known as HSV-1 or HSV-2, it can cause both sores on the lips (cold sores) and sores on the genitals (genital herpes). HSV-1 is more often the cause for cold sores, while HSV-2 mostly causes genital sores.
Rating:Essay Length: 1,371 Words / 6 PagesSubmitted: January 23, 2010 -
Het Klimaat
Jack Hall is een klimatoloog die tijdens een lezing zijn bezorgdheid uitspreekt over een dreigende verandering van klimaat. Hij doelt hiermee niet op een geleidelijke verandering, maar een zeer drastische. In de geschiedenis is zo'n wijziging ййn keer eerder voorgekomen en dat had toen een ijstijd tot gevolg. Er is maar ййn aanwezige die hem serieus neemt en dat is Terry Raspon. Rapson is ook veel met het klimaat bezig en heeft ook diverse artikelen
Rating:Essay Length: 286 Words / 2 PagesSubmitted: December 30, 2009 -
Heterotrophic Nutrition
Organisms that aren’t food producers must be food consumers. This method of nutrition is described as heterotrophic (eating others). Consumers include: predators, parasites, scavengers, decomposers and some green plants (e.g. sundews, Venus flytrap, pitcher plants). The food sources may be all or any of: plants, animals, fungi or bacteria; either living or dead. The advantages of the heterotrophic method of nutrition are: the food usually contains all the appropriate chemicals needed by the consumer
Rating:Essay Length: 1,432 Words / 6 PagesSubmitted: February 13, 2010 -
Heterozygosity, Fitness and Inbreeding Depression in Natural Populations
Heterozygosity, fitness and inbreeding depression in natural populations Inbreeding is mating between close relatives and can depress components of reproductive fitness thus having detrimental effects on the populations survival, a phenomenon known as inbreeding depression. There are two principal theories for the mechanism of inbreeding depression. The partial dominance hypothesis (Charlesworth and Charlesworth, 1987) suggests that inbreeding increases the frequency of homozygous combinations of deleterious recessive alleles due to the increased chance of offspring inheriting
Rating:Essay Length: 253 Words / 2 PagesSubmitted: February 17, 2010 -
High and Low Blood Pressure
High or Low Blood Pressure? Purpose: The purpose of this experiment is to compare blood pressure as related to gender and athletic status. Hypothesis: I predict that males have a higher blood pressure than women and athletes have a higher blood pressure than non athletes Background Info: Blood pressure is the amount of force that blood pushes against the inside walls of blood vessels as it passes through. This pressure is initially produced by
Rating:Essay Length: 1,828 Words / 8 PagesSubmitted: March 28, 2010 -
High Conductance in Dendritic Function
introduction Most of our understanding of dendritic function has come from studies in isolated preparations like brain slices.This approach has been very successful in defining the basis of dendritic excitability and identifying subunits in neurons. These in vitro recordings have not only shown the diversity of voltage-gated ion channels in dendrites, but have also mapped their distributions and revealed how their densities change during development.However, the baseline conditions in brain slices are often very
Rating:Essay Length: 528 Words / 3 PagesSubmitted: January 30, 2010 -
High School Vs. College
High School vs. College Upon attending college for almost a year, I have found that I enjoy being a college student more than being a high school student. In this short amount of time, I have seen that more freedom is allowed to students in college than in high school as far as most of the important decision-making is concerned. Such choices as schedule, attendance, or class selection are a few examples of how college
Rating:Essay Length: 850 Words / 4 PagesSubmitted: May 8, 2010 -
Hilbert’s Problems
Hilbert's Problems In an address to the International Council of Mathematicians in 1900, David Hilbert (1863-1942), a professor of mathematics at the University of Goettingen, outlined 23 significant problems in mathematics for the community to research in the new century. The problems cross many areas of mathematics, including set theory, arithmetic, geometry, group theory, variable calculus, algebra, and others. Some problems were relatively straightforward and were thus quickly solved, but others were expansive and may
Rating:Essay Length: 415 Words / 2 PagesSubmitted: February 10, 2010 -
Hipaa Compliance
HIPAA Compliance If you are in the healthcare industry, you have probably heard some rumblings about the Health Insurance Portability and Accountability Act of 1996, coolly referred to as HIPAA. The word is your medical practice will have to be HIPAA compliant by April 2003, but you're not exactly sure what this act mandates or how to accomplish it. In very basic terms, HIPAA has two primary components to which hospitals, health plans, healthcare "clearinghouses,"
Rating:Essay Length: 718 Words / 3 PagesSubmitted: February 19, 2010 -
Hippos
Time to Weigh the Hippos Martha, a caregiver at a wild animal park, is picking up four hippos. She must weigh each of them before she can take them. The only scale large enough to weigh them is a truck scale. The minimum weight that a truck scale can weigh is 300 kg. However, each individual hippo weighs less than 300 kg. She weighs the hippos in every possible pair so that she can figure
Rating:Essay Length: 451 Words / 2 PagesSubmitted: December 29, 2009 -
Histology of Compact and Cancellous Bone
Histology of Compact and Cancellous Bone Rylee Ann Ertle Advanced Biology, The Human Body October 28th, 2016 Introduction: Bone tissue, according to The Free Dictionary: Medical Dictionary, is defined as “a hard form of connective tissue composed of osteocytes and a calcified collagenous intercellular substance arranged in thin plates.” This definition could be simplified into something like this. Bone tissue is the layers of hard connective tissue that the bone is made of. But this
Rating:Essay Length: 779 Words / 4 PagesSubmitted: November 10, 2016 -
Historical Development of the Atom
The notion of the atom all stared about 450 BC when a Greek scholar starting think when can something break on more, when are the pieces at their smallest, this mans name was Leucippus. Leucippus also had pupil who also thought the same way as Leucippus, his name was Democritus. They developed there ideas and when Democritus died his theory summed up briefly was that everything in the world was made of tiny pieced that
Rating:Essay Length: 574 Words / 3 PagesSubmitted: May 4, 2010 -
History of Astronomy and Neptune
Science is and has become a necessity to know just to keep up with the tremendous advancements of today and tomorrow. Basic things, such as how the universe was suspected to be started or who Ptolemy and Galileo were and what they did are just things that need to be known to fully understand what is happening in the world around you. These things are what you need to know, if you’re a scientists,
Rating:Essay Length: 2,597 Words / 11 PagesSubmitted: December 12, 2009 -
History of Calculus
History of Calculus The history of calculus falls into several distinct time periods, most notably the ancient, medieval, and modern periods. The ancient period introduced some of the ideas of integral calculus, but does not seem to have developed these ideas in a rigorous or systematic way. Calculating volumes and areas, the basic function of integral calculus, can be traced back to the Egyptian Moscow papyrus (c. 1800 BC), in which an Egyptian successfully calculated
Rating:Essay Length: 1,147 Words / 5 PagesSubmitted: November 19, 2009 -
History of Evolution
Abstract Evolution is a change in the characteristics of a population from generation to generation. Evolution occurs via natural selection which creates competition between organisms to survive. Although, people have been thinking about evolution for years, Charles Darwin is often referred to as the father of evolution. The theory of evolution is also a topic of great debate because some parts of the theory contradict people’s religious beliefs. Introduction Since Charles Darwin published The
Rating:Essay Length: 898 Words / 4 PagesSubmitted: April 22, 2010 -
History of Judaism
Cloning is based on nuclear transfer, the same technique scientists have used for some years to copy animals from embryonic cells. Nuclear transfer involves the use of two cells. The recipient cell is normally an unfertilized egg taken from an animal soon after ovulation. Such eggs are poised to begin developing once they are appropriately stimulated. The donor cell is the one to be copied. A researcher working under a high-power microscope holds the recipient
Rating:Essay Length: 654 Words / 3 PagesSubmitted: March 16, 2010 -
History of Scuba
SCUBA Ever since the caveman humans have had a fascination with the water for many reason. It was a source of food, mystery and many helpful tools. The first ever trace of scuba was thousands of years ago when primitive man decided to use a hollow read to breathe through. Though the reed was light and worked well it limited the dive to the very surface of the water. The initials scuba stand for self
Rating:Essay Length: 479 Words / 2 PagesSubmitted: April 1, 2010 -
History of the Double Helix
The History of the Double Helix In our study of the sociology of science, reading James Watson’s account of the discovery of the structure of DNA in The Double Helix gives us an insight into how science works as a “collective activity.” To illustrate how the norms of science work through this description of events I chose specifically to look at the system of hierarchy among the scientists, how the scientists share information between labs,
Rating:Essay Length: 1,600 Words / 7 PagesSubmitted: January 31, 2010 -
History of the Mol Space Station
“The United States has been in space from the very beginning; its intentions are not sinister or evil. The United States is there to help preserve its security and to defend itself and it will use the tools and techniques that make strategic, tactical, and economic sense to achieve defense and security. If that proves to include military man in space, then it will acquire the systems to do that.” On May 1, 1960 the
Rating:Essay Length: 1,540 Words / 7 PagesSubmitted: November 29, 2009 -
History of the Periodic Tbale
Things are very different from each other, and can be broken down into small groups inside itself, which was then noticed early by people, and Greek thinkers, about 400BC. Which just happened to use words like "element', and 'atom' to describe the many different parts and even the smallest parts of matter. These ideas were around for over 2000 years while ideas such as 'Elements' of Earth, Fire, Air, and Water to explain 'world stuff'
Rating:Essay Length: 673 Words / 3 PagesSubmitted: April 22, 2010 -
History of the Philippine Superstitions
RONN BRIANE E. ATUD Second Semester, 2015-2016 Communication II-8 Katherine T. Valencia HISTORY OF THE PHILIPPINE SUPERSTITIONS (Concept Paper) Saenko (2011) claims that the new generation has developed their own lifestyles that are very different from the previous generations. Many cultures died out, got forgotten, and became unexercised. This is happening because of the rapidly growing technology, commercialization, industrialization, and globalization. An aspect of culture which has been totally affected by these is the superstitions.
Rating:Essay Length: 1,126 Words / 5 PagesSubmitted: March 14, 2016 -
History of the Stock Market
The financial markets of the United States, today, are collectively known as “Wall Street.” These words represent the heart of the business and financial world in the United States today. Many of us conjure up well known images of companies being bought and sold, traders screaming out to get the best prices for their clients, fortunes won and lost many times over, and the billions of dollars exchanged in deals. Some may even claim that
Rating:Essay Length: 2,518 Words / 11 PagesSubmitted: February 9, 2010 -
History of Theory of Evolution
HISTORY OF THEORY OF EVOLUTION In 1543, a young Flemish anatomist Andreas Vesalius challenged Galen’s theories of the Human Body. This discovery had an impact on scientists. Vesalius’ discovery of the important differences between species also helped usher in the science of comparative anatomy, in which researchers studied animals to find their similarities and differences. In the process, they gradually began to recognize humans as being one species among many, with a few unique traits
Rating:Essay Length: 1,932 Words / 8 PagesSubmitted: May 11, 2010 -
Hiv
HIV Many eyebrows raised late in 1979, when the then unknown HIV virus raised its ugly head. The first two cases of the rare cancer, Karposis Sarcoma was diagnosed in two homosexual men in N>Y>C. About the same time in Los Angeles, several cases of the rare infection, Pneumocytis cariini pneumonia were being treated. Incidences of these strange diseases and infections were sky-rocketting around the country. The disease was effecting mostly young gay men in
Rating:Essay Length: 1,069 Words / 5 PagesSubmitted: May 11, 2010 -
Hiv and Aids Research
HIV and AIDS Research The origin of AIDS and HIV has puzzled scientists ever since the illness first came to light in the early 1980s. For over twenty years it has been the subject of fierce debate and the cause of countless arguments, with everything from a conspiracy by the government to a contaminated needle theory being blamed. So what is the truth? Just where did AIDS come from? The discovery of HIV, the Human
Rating:Essay Length: 880 Words / 4 PagesSubmitted: November 14, 2009 -
Hiv Testing
Few diagnostic tests or screening procedures have drawn as much deliberation and controversy as the human immunodeficiency virus (HIV) test. Because of the transmittable and highly fatal nature of the virus, it has been recommended that all Americans receive HIV screening. However, according to Branson (2006), “an estimated one quarter of the approximately 1 to 1.2 million of HIV-infected persons in the United States are unaware that they are infected” (para. 3). Despite hospital
Rating:Essay Length: 1,141 Words / 5 PagesSubmitted: December 18, 2009 -
Hiv Vaccine Testing America
Michelle Raess The Human Body Dr. Shirley M. Bartido HIV Vaccine Testing in Africa The United Nations estimates that 5.8 million people per year become infected with the immunodeficiency virus (HIV). Ninety percent of these infections occur in sub- Saharan Africa, where infected persons do not have access to antiviral therapy. Approximately 2.4 million Africans died of AIDS in 2002, and 3.5 million occurred in the region. Where in the United States $12,000-$15,000 is usually
Rating:Essay Length: 1,117 Words / 5 PagesSubmitted: December 12, 2009 -
Hiv/aids
HIV/AIDS Has it Been Conquered? To answer that question truthfully HIV/AIDS has not been conquered. But there is still hope there are researchers working around the clock 24 Hours a day trying to cure this disease. HIV/AIDS is a serious disease and killed over 22 million people and there are over 42 million people in America living with it. The question is “what is HIV/AIDS”? What is HIV? HIV stands for human immunodeficiency virus. It
Rating:Essay Length: 2,324 Words / 10 PagesSubmitted: December 20, 2009 -
Hiv/aids
HIV/AIDS Awave of sickness fell across the nation. People developed flu-like symptoms, which then led to prolonged fever, swollen lymph glands, immense fatigue and night sweats, if the person in question showed any symptoms at all. People began dieing unexpectedly. No one knew what was causing the people to die so rapidly. In 1983 the virus that caused this disease was finally identified as LAV (lymphadenopathy-associated virus) in France. Around the same time, the Americans
Rating:Essay Length: 1,085 Words / 5 PagesSubmitted: March 31, 2010