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 2,071 - 2,100
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Hiv/aids and Homeostasis
AIDS (acquired immunodeficiency syndrome) is caused by HIV (human immunodeficiency virus). HIV is transmitted usually through unprotected sex with someone who is already infected, but it can also be transmitted through infected blood. The immune system is greatly affected by the disease. Once it enters the body, the virus recognizes a protein on helper T-cells, called CD4 (Cluster of Differentiation Antigen No. 4), and it attaches onto that receptor to take over the CD4 cell.
Rating:Essay Length: 402 Words / 2 PagesSubmitted: December 11, 2009 -
Holden’s Sexual Exploits
Holden’s Sexual Exploits The Catcher In the Rye is voted as one of the most controversial book for many reasons; however, Holden’s sexual exploits serves as an idea that is unappreciative. Although this topic is questionable in a book taught to teenagers, we must understand that this is developed as a manifestation of Holden’s illness. His isolation and loneliness exposes him to certain events and feelings as he attempts to live life morally, and evidence
Rating:Essay Length: 609 Words / 3 PagesSubmitted: November 20, 2009 -
Holograms
Holograms Toss a pebble in a pond -see the ripples? Now drop two pebbles close together. Look at what happens when the two sets of waves combine -you get a new wave! When a crest and a trough meet, they cancel out and the water goes flat. When two crests meet, they produce one, bigger crest. When two troughs collide, they make a single, deeper trough. Believe it or not, you've just found a key
Rating:Essay Length: 1,004 Words / 5 PagesSubmitted: December 6, 2008 -
Homeopathic Theraphy
Homeopathic Survey of Alternative Medicine October 8, 2003 Homoeopathy is an alternative method of treatment, based on the nature's Law of Cure, or the saying 'Like Cures Like'. Discovered by a German scientist Dr. Samuel Hahnemann in 1796, and has been verified experimentally and clinically for 200 years. Homoeopathy is the revolutionary, natural medical science. Homoeopathy is gentle and effective system of medicine. The remedies are prepared from natural substances to precise standards and work
Rating:Essay Length: 564 Words / 3 PagesSubmitted: December 9, 2009 -
Homeopathic Treatments
Catholicism in Ireland was under attack. The English were trying to rid Ireland of Catholics altogether. William of Orange, a protestant, was invited to ascend the English throne, and the wars began. By the year 1843, we Catholics had been made slaves. We were not allowed to vote or even attend civic events. Irish-Catholic children were not permitted to go to school. My father was a potato farmer, and was able to feed us
Rating:Essay Length: 976 Words / 4 PagesSubmitted: April 23, 2010 -
Homeosatsis in Fish
TITLE: Homeostasis in Fish INTRODUCTION: Homeostasis is the ability of an organism to maintain an inner equilibrium or balance. Fish, as well as other higher level organisms, possess this ability. When the environment around a fish changes the organism does a variety of thing to maintain balance. One such occurrence is when a fish opens its mouth more or less with a change in temperature. OBJECTIVE: The purpose of this lab was to observe the
Rating:Essay Length: 350 Words / 2 PagesSubmitted: February 15, 2010 -
Homeostasis
Science Homeostasis The conditions inside the body must be controlled within narrow limits. This is called homeostasis. These conditions include water content, ion content, body temperature and blood glucose concentration. The thermoregulatory centre is the part of the brain that monitors and controls body temperature. The pancreas meanwhile monitors and controls blood glucose concentration. It produces a hormone called insulin that reduces blood glucose levels. Diabetes is a disease which can be caused by insufficient
Rating:Essay Length: 975 Words / 4 PagesSubmitted: May 16, 2010 -
Homeostatic Imbalances of the Spinal Cord: Spinal Stenosis
Stenosis means “closing in” or “choking”. Spinal stenosis describes a condition in which the nerves in the spinal canal are closed in, or compressed. The spinal canal is the hollow vertical hole formed by the bones of the spinal column. Anything that causes this bony hole to shrink can squeeze the nerves inside. This narrowing can irritate the nerve roots that branch out from the spinal cord, or it can squeeze and irritate the
Rating:Essay Length: 2,312 Words / 10 PagesSubmitted: December 14, 2009 -
Homepathic Practitioners
Before this project I had no idea what a homeopathic practitioner was or what a bonding agent actually did. A bonding agent, was it something to do with stocks and bonds, or did this ‘agent’ actually ‘bond’ something together; a homeopathic practitioner, a doctor maybe? I had no idea how many occupations I had never heard of before. When I first heard the word ‘homeopathic practitioner’ I automatically thought of a doctor, yet as I
Rating:Essay Length: 869 Words / 4 PagesSubmitted: November 26, 2009 -
Homo Erectus Vs. Homo Sapien
Homo erectus existed between 2 million and 400,000 years ago, but they are considered interestingly similar to us humans today. There are researchers working hard to add pieces to this Homo erectus and human puzzle as it remains a controversial topic between some. The concept of wether the time line between Homo erectus and Homo sapien should be sunk into one or not is a main focus. With similarities in behavior and appearance it
Rating:Essay Length: 641 Words / 3 PagesSubmitted: November 28, 2009 -
Homo Georgicus
Approximately 2.0 million years ago several findings regarding early human ancestors were made in East Africa. Some of these discoveries were made along lakeshores and beaches. Here paleoanthropologists discovered large male structures. And ever since, new discoveries of these hominids, as they are called, have been made every year all over the world. Paleoanthropologists have come to the agreement that these hominids that were found in Africa are all members of the genus Homo, and
Rating:Essay Length: 873 Words / 4 PagesSubmitted: December 4, 2009 -
Homosexuality and Religion
Invertebrates: Planaria I. Abstract: The purpose of this experiment is to study the movements and regeneration abilities of the planarian flatworms. Planaria reproduce by means of regeneration, which can be considered a form of asexual reproduction. A severed part of an organism grows into a new individual and the parent organism regenerates the missing part. Using a small pipette, we obtained a planaria from a culture sample and placed it on a clean slide. Using
Rating:Essay Length: 1,407 Words / 6 PagesSubmitted: December 1, 2009 -
Hong Kong Teenagers and Televisions
Hong Kong Teenagers and Televisions The goal of this essay is to demonstrate how television has had an impact on the lives of people in Hong Kong. A conventional analog television is a device which decodes analog signals into sound and visual effects. Starting from the first black-and-white television in 1929 to the present color television or even HDTV, televisions are becoming part of our lives (Genova 2001). This essay focuses on discussing how televisions
Rating:Essay Length: 1,050 Words / 5 PagesSubmitted: March 9, 2010 -
Hope
Is there hope in this lifetime, Is this hell eternal or prime, I often sit and wonder is there ever an end, When I take a few steps forward and then I fall back again. I feel chained down, locked up tormented day by day, i see no escape no way out this is where i stay, i cannot cry, angel is filling my soul with grife and hate, what happen to hope, what
Rating:Essay Length: 296 Words / 2 PagesSubmitted: December 3, 2009 -
Hormone Levels During the Menstrual Cycle
Lab Exercise 8.5.1 Hormone Levels During The Menstrual Cycle a) WX represents the hormones, which stimulate the follicle, FSH, and YZ represents the thickening of the corpus luteum, done by LH, which produces progesterone (Y). b) The ovarian hormones released by WX is estrogen and progesterone is released by YZ. c) Estrogen and progesterone exert negative feedback effects. d) See attached graph. e) See attached graph. f) Before ovulation the temperature slowly decreases and reaches
Rating:Essay Length: 512 Words / 3 PagesSubmitted: January 19, 2010 -
Horoscope
Astrology is the divination of the supposed influences of the stars and planets on human affairs and terrestrial events by their positions and aspects. Many people look to astrology as a means of predicting what will happen in their future. Such predicting is made through a person’s horoscope. This is a person’s zodiac sign determined by the month that the person is born in. For the month of December Susan Miller makes her predictions
Rating:Essay Length: 531 Words / 3 PagesSubmitted: March 5, 2010 -
Hospital Information System
Abstract The aim of this paper is to showcase the early steps of managing and developing a Hospital Information System for ‘Hospital Serdang International’ by System Solutions Sdn Bhd. This paper covers the company profile, module selection, advertisement, interview session for the new recruitments, and cost estimation of this project 1.0 Introduction System Solutions Sdn. Bhd. have been selected and trusted to build a hospital information system for the new ‘Hospital Serdang International’ This estimated
Rating:Essay Length: 288 Words / 2 PagesSubmitted: December 27, 2009 -
Hotmail_hacking
HOW TO HACK AOL®, YAHOO® AND HOTMAIL® We get numerous calls from people who want to recover AOL®, Yahoo® or Hotmail® or other online and email passwords. We do not do this type of work. Many of these people claim that they have lost their passwords because they have been hacked and now need to get their password back. As we have reviewed information on the web, we found very little real information about the
Rating:Essay Length: 561 Words / 3 PagesSubmitted: May 13, 2010 -
Hotzone
Section II: Summary “ We don’t really know what Ebola has done in the past, and we don’t know what it might do in the future.” (p.49) According to Eugene Johnson, a civilian virus hunter, specializing in Ebola, the essence of the virus itself is one whose existence is still unintelligible to humans. The knowledge of the nature of this virus, as well as Marburg the “gentle sister” of the three filovirus sisters (Ebola Zaire,
Rating:Essay Length: 1,010 Words / 5 PagesSubmitted: December 3, 2009 -
Housing Starts: An Empirical Study
Senior Seminar Housing Starts: an empirical study Introduction The housing sector is of importance in virtually any economy. The housing market is not a market in a classical sense but a series of overlapping submarkets differentiated by location, age of dwelling, type of tenure, age and quality. It is a basic necessity all over the world. First, housing is an essential consumption element that takes up a large share of the typical household’s budget.
Rating:Essay Length: 3,042 Words / 13 PagesSubmitted: November 21, 2009 -
How Acid Rain Affects Organisms in Aquatic Biomes
How Acid Rain Affects Organisms in Aquatic Biomes Through the advancement of technology, the issue of the air surrounding the earth might have been one of the most often matters to be brought up and discussed among scientists and engineers. Acid rain is one of the more serious environmental problems and it is closely related to the air pollution. Nowadays, it has affected large part of US, Europe and Canada. People start to be concerned
Rating:Essay Length: 2,026 Words / 9 PagesSubmitted: December 5, 2009 -
How Can a Lack of Dorsiflexion Lead to Shoulder Pain in a Person Who Plays Volleyball?
How can a lack of dorsiflexion lead to shoulder pain in a person who plays volleyball? I am going to start by imagining a student who would walk into my tennis club for a lesson. This student would tell me about a shoulder discomfort that surfaces especially when performing overhead motions. I would then find out that she has been a volleyball player for quite some time. During my evaluation, which would include walking and
Rating:Essay Length: 1,347 Words / 6 PagesSubmitted: November 21, 2009 -
How Can Arsenic Affect My Health?
How can arsenic affect my health? Breathing high levels of inorganic arsenic can give you a sore throat or irritated lungs. Ingesting very high levels of arsenic can result in death. Exposure to lower levels can cause nausea and vomiting, decreased production of red and white blood cells, abnormal heart rhythm, damage to blood vessels, and a sensation of "pins and needles" in hands and feet. Ingesting or breathing low levels of inorganic arsenic for
Rating:Essay Length: 284 Words / 2 PagesSubmitted: May 9, 2010 -
How Can Pepsi and Coke Confront the Issues of Water Use
How can Pepsi and Coke confront the issues of water use in the manufacture of their products? How can they defuse further boycotts or demonstrations against their products? How effective are activist groups like the one that launched the campaign in California? Should Coke address the group * directly or just let the furor subside? * * Pepsi has no issues with the Govt. * It managed to stay aloof of all the controversies. *
Rating:Essay Length: 394 Words / 2 PagesSubmitted: July 30, 2014 -
How Can the Amount of Copper Extracted by Electrolysis Be Changed?
How can the amount of Copper extracted by electrolysis be changed? Planning We can change the amount of copper extracted by electrolysis by changing the time it is electrolysed. The copper ions from the positive electrode, are attracted to the negative electrode, because copper ions are positively charged, the copper sulphate solution allows copper ions to move to the negative electrode. When the copper leaves the impure copper electrode, it will leave the impurities at
Rating:Essay Length: 1,645 Words / 7 PagesSubmitted: January 25, 2010 -
How Can You Tell Pigment Separation by Using Chromatography?
Problem How can you tell pigment separation by using Chromatography? Objective To prepare a chromatogram, separate pigments in a leaf and interpret the chromatogram. Hypothesis If I am to put a chromatography paper into a solvent, then it would separate the pigments depending on their Rf value. I think the pigments will separate in this order: Chlorophyll A, Chlorophyll B, Carotene, and Xanthophyll. Introduction Chlorophyll is the molecule that absorbs sunlight and uses its energy
Rating:Essay Length: 1,152 Words / 5 PagesSubmitted: November 11, 2009 -
How Chemicals and the Menhaden Affect the Chesapeake Bay
How Chemicals and the Menhaden Affect the Chesapeake Bay By: Justin Dawson Introduction The Atlantic Menhaden is one of the most important and abundant species of fin-fish in estuarine and coastal Atlantic waters. They are the second most important species harvested in the United States in terms of quantity. They are processed for their oil, made into fish meal, protein meal and solubles, and used as bait for commercial and recreational fishing. As fishmeal
Rating:Essay Length: 2,378 Words / 10 PagesSubmitted: February 28, 2010 -
How Dna Works
In the last few years, DNA evidence has started to play a big part in many nations' criminal justice systems. It has been used to prove that suspects were involved in crimes and to free people who were wrongly convicted. In the United States, it has been integral to several high-profile criminal cases, including the trial of Orenthal James (O.J.) Simpson and the investigation of the 1996 murder of JonBenet Ramsey. Most people have a
Rating:Essay Length: 428 Words / 2 PagesSubmitted: March 13, 2010 -
How Do Antioxidants Improve Health?
Lets say you are chopping up vegitables in the kitchen, you’ve been chopping for the last half hour, for one second that you lacked all concentration, you cut yourself. It’s a pretty deep cut and the blood starts to burst out immediately. You quickly grab some paper towel and wrap it around your finger.It’s a few days later now and you see there scab where the cut left on your finger. The scab falls
Rating:Essay Length: 1,011 Words / 5 PagesSubmitted: January 21, 2010 -
How Do Rainbows Form?
How do rainbows form? 2-24-2007 One of the most fascinating things occurring in nature, is the formation of a rainbow. Everyone, at one time or another has seen a rainbow, and without a doubt, has wondered why these beautiful things are not seen all the time? This is exactly what will be explained in this paper. A rainbow, simply put, is the dispersion of white light (from the sun), through a prism (raindrops) into a
Rating:Essay Length: 816 Words / 4 PagesSubmitted: April 26, 2010