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Free research papers and essays on topics related to: microscope
- Microscope Types - 1,381 words
Microscope Types The use of a microscope is to provide a magnified view of objects (that are being analysed) that are otherwise to small to be seen by the naked eye. They can be described according to their illumination and lens arrangement. (i) Microscopes are able to use either light or electrons as their illumination source, which are respectively known as light powered and electron microscopes. (ii) Monocular microscopes have a single eye piece where as binocular microscopes posses two eye pieces, position side by side for simultaneous viewing with both eyes. (iii) A simple microscope consists of one single lens system where as a compound microscope consists of two main lens systems, an ...
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... own as the corpus hemorrhagicum. Cells of the membrane granulosa are transformed into large granulosa lutein cells. Moreover, the cells of the theca interna also increase in size to become theca lutein cells, although they remain smaller than the granulosa lutein cells. Corpus Albicans (D) The corpus albicans is a corpus luteum that is in the process of involution a hyalinization. It becomes fibrotic with few fibroblasts among the intercellular materials. Eventually, the corpus albicans will become scar tissue on the ovarian surface. TESTES Capsule The fibromuscular connective tissue capsule of the testes is known as the tunica albuginea, whose inner vascular layer is the tunica vascul ...
Related: microscope, scar tissue, stem cells, cell structure, plant - A Quantum Computer A Future Technology - 1,415 words
A Quantum Computer... a future technology Mike Damewood By the strange laws of quantum mechanics, Folger, a senior editor at Discover, notes, an electron, proton, or other subatomic particle is "in more than one place at a time," because individual particles behave like waves, these different places are different states that an atom can exist in simultaneously. Ten years ago, Folger writes, David Deutsch, a physicist at Oxford University, argued that it may be possible to build an extremely powerful computer based on this peculiar reality. In 1994, Peter Shor, a mathematician at AT&T Bell Laboratories in New Jersey, proved that, in theory at least, a full-blown quantum computer could factor ...
Related: quantum, quantum computer, quantum mechanics, technology, simple steps - 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 - Alzheimers - 435 words
ALZHEIMER'S Brian Foster Health March 2, 1999 Alzheimer's disease was first described by Alois Alzheimer. Alois Alzheimer was a German psychiatrist and neuropathologist and he first described it in 1906. The disease was first thought to be a rare condition affecting only young people, and was referred to as presenite dementia. About 10 percent of the United States population over the age of 65 is affected by Alzheimer's disease, and up to 45 percent of those over the age of 85 may have the disease. Up to 2 million people suffer from it, or one percent of the population. During the early stages of the disease, a person forgets daily events, but they can still recall things that happened many ...
Related: alois alzheimer, book encyclopedia, united states population, drug administration, familiar - Alzheimers Disease - 1,261 words
Alzheimers Disease Alzheimers Disease We are currently living in the age of technology. Our advancements in the past few decades overshadow everything learned in the last 2000 years. With the elimination of many diseases through effective cures and treatments, humans can expect to live a much longer life then that of their grandparents. The population of the United States continues to rise, and with the baby boom era coming of age, the number of elderly people is rising as well. This increase has brought with it a large increase in diseases associated with old age. Alzheimer's dementia is one of the most common and feared diseases afflicting the elderly community. Alzheimers disease, once th ...
Related: alois alzheimer, alzheimer's disease, alzheimers disease, different types, psychoactive drugs - Animal Behavior - 2,263 words
Animal Behavior Biology lb Abstract Animal behavior is predictable. Their behavioral tendencies are influenced by the relationship of its anatomy to their environment. By observing various forms of life, and associating the mechanism of their abilities to perform a behavioral action, evolutionary influence thereafter, can be analyzed and deduced from that point. Introduction The science and study of animal behavior involve an enormous array of complicated factors. For instance, stereotyped responses are unlearned behavioral reactions to some environmental stimulus predicated upon an organism relationship to its physical environment and anatomy. This obviously begs the question; is the observ ...
Related: animal behavior, more important, field trip, guinea pig, incredible - Animal Testing - 1,425 words
Animal Testing Considering the furor raised about using animals for testing, are there alternatives to using such testing? What are the main tests that use animals and alternatives that would achieve similar results? There is a lot of controversy about using animals to test cosmetics. Animal rights organizations feel that it is unnecessary and uncalled for. The Food and Drug Administration have no law that cosmetics have to be tested on animals. The main reason cosmetic companies continue to use animals to test their products instead of the alternatives is because they are afraid of getting laws suites. The alternatives to animal testing have not yet been validated, therefore if they were ta ...
Related: animal liberation, animal rights, animal testing, testing, research methods - Anthopleura - 1,224 words
Anthopleura Elegantissima The sea anemones that were collected for the "Clone Specific Segregation in the Sea Anemone Anthopleura elegantissima" experiment were collected by Lisbeth Francis in Pacific Grove, California (Biological Bulletin 1973, 144; 64-72). The topic of Franciss report is the particularity of the constant anemone-free areas dividing contiguous accumulations of these anemones and the connection of these areas to the dispersion and manner of these anemones. In her report Francis describes how she did her experiment and the result of each step. Francis also includes a discussion section where she discusses advantages versus disadvantages of segregated aggregations and organism ...
Related: sea anemones, aggressive behavior, ocean life, aggressive, segregated - Approaches To Environmental Ethics And Kants Principle - 979 words
Approaches To Environmental Ethics And KantS Principle 1. All of the three approaches to environmental ethics use Kant's principle to various extents. The differences between them lie in their individual definitions of moral categories. It's like looking at the same slide under three different powers on a microscope. Each approach relies on Kant's principle to protect the interest of that which they deem worthy. Baxter's anthropocentric approach clearly states that our obligations regarding the environment are to be determined solely on the basis of human interests. Our welfare depends on breathable air, drinkable water and edible food. Thus, polluting the environment to the extent that it d ...
Related: approaches, environmental, environmental ethics, ethics, intrinsic value - Aristotle - 847 words
Aristotle Aristotle, Galileo, and Pasteur can be said to have contributed significantly, each in his own way, to the development of "The Scientific Method." Discuss. What is the scientific method? In general, this method has three parts, which we might call (1) gathering evidence, (2) making a hypothesis, and (3) testing the hypothesis. As scientific methodology is practiced, all three parts are used together at all stages, and therefore no theory, however rigorously tested, is ever final, but remains at all times tentative, subject to new observation and continued testing by such observation. Hellenic science was built upon the foundations laid by Thales and Pythagoras. It reached its zenit ...
Related: aristotle, common sense, charles darwin, louis pasteur, history - Biodiversity - 1,177 words
Biodiversity Diversity Essay American biologist R. H. Whittaker in 1959 described a classification system of five primary kingdoms: plants, animals, fungi, protists, and monera. Kingdom animalia cover all taxonomic kingdom all living or extinct animals, an example of an animal is a human. Humans thrive off of one thing or another in each of the five kingdoms. The monera kingdom is the lowest division of rhizopods. Bacteria belong to this kingdom. There are many useful and harmful bacteria in the human body including those that are similar to amoebas. They dont have a nucleus. Plantae consist of all living or extinct plants (Plantae, kingdom Plantae, plant kingdom) the taxonomic kingdom that ...
Related: biodiversity, humans evolved, animal kingdom, north america, specialized - 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 - Brain Cancer - 635 words
Brain Cancer The body normally forms new cells only when they are needed to replace old or damaged ones. If something happens to disturb this controlled process, abnormal or excessive cells are produced. When this occurs a tumor is developed. This is known as cancer. When a tumor is developed on the brain, it is called a brain tumor or brain cancer. Brain tumors can be benign or malignant (benign being not cancerous and malignant being cancerous). Both types can be deadly when dealing with the brain. Benign brain tumors consist of very slow growing cells. They have distinct borders and rarely spread to other locations. When viewed under a microscope, the cells of a benign tumor have an almos ...
Related: brain, brain cancer, brain tumor, cancer, cancer research - Chemical Reactions - 1,932 words
Chemical Reactions Chemical reactions are the heart of chemistry. People have always known that they exist. The Ancient Greeks were the firsts to speculate on the composition of matter. They thought that it was possible that individual particles made up matter. Later, in the Seventeenth Century, a German chemist named Georg Ernst Stahl was the first to postulate on chemical reaction, specifically, combustion. He said that a substance called phlogiston escaped into the air from all substances during combustion. He explained that a burning candle would go out if a candle snuffer was put over it because the air inside the snuffer became saturated with phlogiston. According to his ideas, wood is ...
Related: nineteenth century, seventeenth century, eighteenth century, urge, combustion - Christianity Questioned - 773 words
Christianity Questioned In "Christianity and the Machine Age," Eric Gill attempts to prove that Christianity is true. To answer this question, Gill turns not to philosophers, theologians or archaeologists, but to his own consciousness. "If there be God, if there be Christ,... it is to man, to the individual man that he calls." (Gill, 219) Gill bases his argument on the presumption that the truth is the correspondence of thought with thing. "In Christianity thought and thing correspond. It is in that sense that we say Christianity is true, is the truth." (Gill, 219) Gill says that what he knows of Christ corresponds with what he knows and desires and loves as a human. Gill also asserts that h ...
Related: christianity, world religions, religious leaders, christian world, humane - Companies And Other Organizations Use Internetweb Sites For Different Purposes In General, A Web Site Provides An Interface W - 1,078 words
... of Nikes business recollections, transactions, and business dealings, past and present. Nikebiz includes information such as history of the company, important chronological dates in Nike Corp. history, corporate responsibility news and bylaws, global community news, environment news, financial reports, and job listings and overviews for every region that contains Nike factories. The second interesting feature to the web site is that of the ask nike section. In this area of the web site, someone online in the nike web site can ask any question and ask nike will do its best to research and answer the question regarding the any aspect of the company as a whole that someone may wish to know ...
Related: interface, organizations, site analysis, customer satisfaction, global community - Decubitis Ulcers - 1,134 words
Decubitis Ulcers Decubitis Ulcers J. Caldwell P.N.S. 1. Decubitis Ulcers are also known as bed sores.(Marsh 1) They are mostly seen in Geriatrics patients. They occur in people who are put on bed rest, or long periods of wheelchair use. A traumatic decubitis ulcer is precipitated by continuous pressure on the skin and deep tissue with ischemic necrosis (Plewig 369). These particular ulcers are mainly found on bony parts of the body. They develop when the cells die because there is a tremendous amount of pressure put on the skin and it is trapped between a mattress or chair and tiny blood vessels collapse. The parts of the body that are affected by these ulcers are the back of the head, ear, ...
Related: ulcers, skin deep, vital signs, protein synthesis, urine - Devepopment Of Modern Science In Europe - 1,219 words
... nt funds scientists, like the ones at Gresham College, could make great strives in improving the lives of the population and making the nation powerful and rich. Gresham College in London, England was an institution funded by Sir Thomas Gresham, which had close ties with the Royal Navy. Many instruments were developed there which aided in accurate time keeping and observation of the stars, which was so critical in ocean navigation. Instruments such as a newer telescope, the thermometer, the microscope, the pendulum clock, the barometer and the air pump. These instruments not only helped England become a great sea power, by enabling ships to travel farther and return safely, but gave the ...
Related: modern science, physical science, science, preventive medicine, happy life - Diamonds - 993 words
... rmed under intense heat and pressure, and traces of other elements may have been incorporated into their atomic structure accounting for the variances in their color. (Schumann) Diamonds generally range from a shade of yellow or brown to colorless. There are diamonds of other colors such as pink, red, green, blue, orange, and black. These exceptions are rare and sometimes induced by treatments. Diamonds are graded by their color, the AGS and the Gemological Institute of America (GIA) developed color-grading scales. The scales and some sample stones are pictured in figure four. Colorless and fancy yellow diamonds are considered the most valuable. The differences in color grade are subtle, ...
Related: environmental issues, development center, reputation, unit
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