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.
4,609 Essays on Science. Documents 3,001 - 3,030
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Patient Education Project
Patient Education Project The digestive system is a very complex but efficient system that allows the intake and disposal of material that allows the body to perform routine daily activities. The digestive system allows the intake of food and water to be broken down to be used for energy. The digestive system is made up of the mouth, esophagus, stomach, small and large intestines, colon and the rectum. A Potential life-threatening disease of the digestive
Rating:Essay Length: 744 Words / 3 PagesSubmitted: April 24, 2010 -
Pavllovian Response (humor)
Have you ever wanted to make a dog salivate on command? No? Me either, but if you ever want to you can give your thanks to a man name Ivan Pavlov. Who is this deity of digestion? Ivan Pavlov has lived a very distinguished life and has even won a Nobel Prize for his work. Pavlov was born in a small village in Russia. Pavlov's dog was born a poor black child in eastern Moscow.
Rating:Essay Length: 700 Words / 3 PagesSubmitted: January 23, 2010 -
Peace like a River 000
Leif Enger's remarkable novel Peace Like a River quietly slipped into bookstores in September. Like the smart kid who sits at the back of the class and seldom speaks, it was very nearly overlooked during the brawling Franzen-Oprah hoopla. However, Peace Like a River is a book worthy of the loudest trumpet fanfare and showers of confetti available. Put this one right to the head of the class. Enger takes the best of writers --
Rating:Essay Length: 1,148 Words / 5 PagesSubmitted: December 30, 2009 -
Peat Bogs
Peat Formation Peat is a partially decayed organic matter laid down in anaerobic, or lacking oxygen, conditions in wetlands. Peat forms when plant material, usually in marshy areas, is inhibited from decaying fully by acidic conditions. It is composed mainly of peat moss or sphagnum, but also includes trees, grasses, and other marshland vegetation. It also includes many other types of organic remains such as fungi, insects, pollen, and on occasion dead animals. Peat
Rating:Essay Length: 948 Words / 4 PagesSubmitted: November 21, 2009 -
Peat Land Communities
The Peatland Communities Peatlands are wetland communities that form through the accumulation of partially decayed plant material, peat. Peat is the partially decomposed remains of dead plants and to some extent animals. The most common forms of peat are sphagnum mosses and sedges. Peatland communities develop where the amount of organic material exceeds the rate of decomposition. Topography, local climate and hydrology are important factors in the development of a peatland community. Peatlands can take
Rating:Essay Length: 257 Words / 2 PagesSubmitted: March 16, 2010 -
Peer Pressure in Adolescent’s Eyes
Peer Pressure in Adolescent’s Eyes What is peer pressure? Peer pressure can be described as a positive or negative reaction that occurs when one is influenced by certain people (http://dictionary.com). Peer pressure is constantly surrounding individuals all the time. I believe friends, family members, and religious institutions have the strongest influence of peer pressure on society. When adolescents are faced with difficult decisions, they turn to those they can trust to help them make the
Rating:Essay Length: 559 Words / 3 PagesSubmitted: February 13, 2010 -
Pemphigus
Pemphigus “Blistering skin”  Pemphigus involves blistering of the outer layer of the skin (epidermal) and mucous membrane. It’s an autoimmune disorder where the immune system produces antibodies against specific protein in the skin and mucous membrane (I.e. the body’s immune system mistakes the cells in the skin as foreign and attack them with antibodies). These antibodies produce a reaction that leads to a separation of epidermal cells. Pemphigus is a very rare disease an
Rating:Essay Length: 344 Words / 2 PagesSubmitted: January 15, 2010 -
Pendulum Investigation
Physics PENDULUM INVESTIGATION Aim of the investigation The aim of the pendulum investigation is to see what will happen if I change a variable whilst I swing a pendulum and see the effect which it has on the pendulums time to complete one whole swing (from where it starts, to the opposite end, and back again). This will give me an insight into what will effect the time of the swinging of the pendulum, be
Rating:Essay Length: 331 Words / 2 PagesSubmitted: December 5, 2009 -
Pendulum Lab
Pendulum Lab A pendulum is something hanging from a fixed point which, when force is applied, swings back, forth, up, and down due to gravity and inertia (Beynon 1). Pendulums can range in shape, size, and weight. An example of a pendulum can range from a swinging chandelier to a washer tied to some string and hung from the ceiling. Galileo was a famous scientist who studied pendulums. He discovered that the period, or time
Rating:Essay Length: 275 Words / 2 PagesSubmitted: February 26, 2010 -
Penguin
of several different aminoacylation identities may be used within any subfamily. These two familial sublocation preferences imply two modes by which new integration site usage evolves. The tmRNA gene has been adopted as an integration site in both modes, and its distinctive structure imposes some constraints on proposed evolutionary mechanisms. Genetic elements capable of horizontal transfer and integration into host chromosomes are key agents in the evolution of cellular genomes; bacterial pathogenicity in particular is
Rating:Essay Length: 250 Words / 1 PagesSubmitted: May 28, 2010 -
Penguins
Myopic little men in tuxedos, or highly efficient land/water animals? Recent research indicates there's more to penguins than meets the eye. If you've every wondered what it would be like to be able to see as clearly under water as you can on land, just ask the nearest penguin.Most aquatic animals are short-sighted on land. Most terrestrial animals (and that includes us) are far-sighted under water. But researchers have discovered that penguins can apparently
Rating:Essay Length: 361 Words / 2 PagesSubmitted: February 13, 2010 -
Penicilin Production
Microorganism selection The highest antibacterial activity and highest productivity was found in P. chrysogenum. And also P. chrysogenum transforms substrates rich in carbohydrates into penicillin. Because of these reasons P. chrysogenum strain is chosen for penicillin G fermentation. Microorganism can be kept lyophilized or stored as a spore suspension 20% glycerol at -20 0C Process description The classical penicillin production process is an aerobic fermentation in fed batch fermentors made with some Penicillium strains, usually
Rating:Essay Length: 441 Words / 2 PagesSubmitted: February 11, 2010 -
Penicillin Serendipity
Penicillin There were many fascinating serendipitous scientific discoveries in the 20th century. One of them was the discovery of penicillin by Sir Alexander Fleming. The discovery and development of penicillin totally changed the direction of approaches to treating infectious diseases and saved millions of lives ever since (1). It was the first antibiotic to successfully treat bacterial infections. Therefore, Alexander Fleming, Ernst B. Chain, and Sir Howard Florey together were awarded the Nobel Prize in
Rating:Essay Length: 2,459 Words / 10 PagesSubmitted: November 16, 2009 -
Pentachlorophenol
PENTACHLOROPHENOL Pentachlorophenol is a manufactured chemical that does not occur naturally. It has a molecular weight of 266.34 g/mol. In its molecular form, it looks like C6HCl5O. It has a melting point of 174 degrees C. It has a boiling point of 310 degrees C. Its density is 1.978 g/mol. Pure pentachlorophenol exists as colorless crystals. Impure pentachlorophenol (the form usually found at hazardous waste sites) is dark gray to brown . The impure form
Rating:Essay Length: 430 Words / 2 PagesSubmitted: April 2, 2010 -
People & Planets
1.1 Introduction With the passing of each year since the beginning of the twentieth century, scientists have become increasingly aware and concerned with the impacts of human civilization on the natural processes of our planet. The culmination of humanity’s varied and far-reaching impacts have come to a head in one overarching problem: global climate change. It is well known that throughout the history of Earth, many global climatic changes, triggered by a complex combination of
Rating:Essay Length: 1,138 Words / 5 PagesSubmitted: January 15, 2010 -
People Who Complain
These rainy days have brought my mood down a bit. I want it to be warm and dry again so we can all wear skirts and go to the beach at night and play in the sand. However despite the lousy weather I know that clear skies are up ahead, eventually, so there’s no reason to sulk and complain about it. I feel bad for the people who are constantly sulking and complaining about their
Rating:Essay Length: 303 Words / 2 PagesSubmitted: January 13, 2010 -
Perancangan Sumber Manusia & Cadangan Penambahbaikan
1.0 DEFINASI DAN PENDAHULUAN Sumber manusia adalah bidang yang luas yang melibatkan individu pekerja di dalam organisasi. Perancangan Sumber Manusia merupakan proses mengkaji keperluan sumber manusia organisasi dan menentukan langkah- langkah untuk memenuhi kepaerluan itu. Ia juga suatu usaha untuk menjangkakan permintaan perniagaan dan persekitaran masa hadapan terhadap sesebuah organisasi dan menyediakan personel bertujuan memenuhi perniagaan dan permintaan tersebut. Menurut The Dictionary of Human Resources and Personnel Management, sumber manusia membawa maksud tenaga buruh yang
Rating:Essay Length: 2,749 Words / 11 PagesSubmitted: May 7, 2011 -
Perceptual Compression of Space Through Position Integration
Perceptual Compression of Space through Position Integration When moving figures are occluded and revealed piecemeal as they move across a narrow slit, observers may perceive them as integrated but distorted. They may also perceive much more of the figure as simultaneously visible than is actually presented at any moment. We obtained quantitative measures of both the perceived distortion and perceived simultaneity under free viewing conditions and related these phenomena to spontaneous pursuit eye movements, the
Rating:Essay Length: 280 Words / 2 PagesSubmitted: March 2, 2010 -
Perceptual Timing in the Elderley
What differences in timing are found in elderly people? How are these accounted for by modern timing theory. Perception of time is a concept that has interested gerontologists for many years. - Subjective changes- ‘Christmas effect’- Christmas comes round quicker each year. Slowing down of information changes An increase in age is accompanied by a reduction in verbal & visuospatial processing rate. Peak age=20- 97% processing rate for verbal & visuospatial rate. At 50, 40%
Rating:Essay Length: 1,301 Words / 6 PagesSubmitted: February 5, 2010 -
Perfectionism Bowel Pain Link
'Perfectionism' bowel pain link A report in BBC news posed a threat to people who are perfectionists. Perfectionists are people who have high expectations of always doing the right thing. The report reveals that such type of people have high risks to developing irritable bowel syndrome or IBS after a gut infection (BBC News, 2007). Such infection leads to inflammation and ulceration in the bowel which can cause to severe vomiting and rectal bleeding (BBC
Rating:Essay Length: 372 Words / 2 PagesSubmitted: November 19, 2009 -
Performance Enhancement Research Paper
Performance Enhancement Research Paper Androstenedione – it was a perfectly legal nutritional substance that was easily accessed in a health food store, but is now banned by the World Anti-Doping Agency and classified as an anabolic/androgenic substance. What does it do, and why would someone use it? This supplement was made famous after Mark McGuire of the St. Louis Cardinals’ admitted to using it. It is now illegal to use androstenedione, as well as any
Rating:Essay Length: 1,026 Words / 5 PagesSubmitted: January 28, 2010 -
Performance Enhancing Drugs
I’m pretty sure you all have engaged in some sort of athletic competition that could be classified as a sport. If you can say that you have, most of you could not keep up with some of the more naturally athletically gifted people you were competing with or against.. If you are sitting there remembering that feeling of being inadequate, thinking back when your parents told you all that mattered is that you tried
Rating:Essay Length: 1,309 Words / 6 PagesSubmitted: December 7, 2009 -
Performance Enhancing Drugs
Jason Dvorak Mrs. Donohue Research Methods 10 December 2000 Performance Enhancing Drugs When most people think of performance-enhancing drugs the first thought that comes to their minds is the illegal ones like steroids, but today there are more non-illegal drugs like creatine and androstenedione for people today. Creatine is a chemical produced by the kidney and found in meat product. It helps muscles recover after a workout, which in turn helps athletes bulk up faster
Rating:Essay Length: 1,826 Words / 8 PagesSubmitted: December 23, 2009 -
Performance of Air Cooler and Heat Pump
PERFORMANCE OF AIR COOLER AND HEAT PUMP Objectives: To carry out the experiment with air cooler and heat pump and compare expected air condition with the real air condition measured using wet and dry bulb thermometers. To evaluate the performance of the air cooler and heat pump at different working conditions Introduction The apparatus is an instrumented version of a commercial heat pump and air cooler. It has a heating or cooling capacity ranging from
Rating:Essay Length: 607 Words / 3 PagesSubmitted: March 5, 2015 -
Period 3 Elements
Across the period, the metallic character of the Period 3 elements decreases. This is evident as sodium, magnesium and aluminium, the first three elements in period 3, are all classified as metals. We observed that they display highly metallic characteristics, as they are all solid, malleable and lustrous. On the other hand sulfur, which is further along the period in group 16, is too a solid although it is quite brittle and in powdered form.
Rating:Essay Length: 524 Words / 3 PagesSubmitted: January 23, 2010 -
Periodic Table
The History of the Periodic Table of Elements Dmitri Mendeleev and the early Periodic Table Dmitri Mendeleev was born in Tobolsk, Siberia; on February 7, 1834 .He was the youngest of 14 children born to Maria Dmitrievna Korniliev and Ivan Pavlovitch Mendeleev. His father was director of the local gymnasium. Maria Korniliev's family settled in Tobolsk in the early 1700's and introduced paper- and glass-making to Siberia. Unfortunately, Ivan died when Dmitri was quite young,
Rating:Essay Length: 1,959 Words / 8 PagesSubmitted: December 22, 2009 -
Periodic Table
Since the beginning of time, it has been human nature to orginaize things so that it will be easier for us to use and understand. The periodic table is one of those things. It was orginaized in such a way that it is filled with patterens everywhere you look. This makes understanding the periodic table much easier and much more interesting. The periodic table, like many other things, is orginized so that the many
Rating:Essay Length: 392 Words / 2 PagesSubmitted: January 12, 2010 -
Peropertve Salary Comparisons
Abstract There are reports among members of the nursing profession that indicate that nurses working in hospitals in the Northern states earn higher salaries than their counter parts in hospitals from the Southern states. Taking advantage of these reports, many nursing employment agencies will try to recruit experienced nurses from the southern states, by promising higher salaries. There can be many reasons, or factors, which give such a difference in salary such as living expenses,
Rating:Essay Length: 1,741 Words / 7 PagesSubmitted: February 13, 2010 -
Personal Code of Ethics
Ethics is defined as "moral rules or principles of behavior for deciding what is right and wrong" (Longman Dictionary of American English, p. 303). People have built their code of ethics based on their beliefs of what is right or wrong. People's ethics can be the ethics in their personal lives, academic environment, workplace, or their combination. As a student at University of Phoenix, I believe that my academic achievement will greatly depend on how
Rating:Essay Length: 497 Words / 2 PagesSubmitted: May 22, 2010 -
Personal Environmental Ethics
There are some people who believe that the United States' strictly forced endangered species laws seriously hamper our economy. I on the other hand must disagree. The endangered species laws were created for an important reason: to protect our earth's biological diversity. Whenever humanity interferes with the ecosystem for the purpose of economic growth it tears it apart piece by piece. It is for reasons like these we must have such tough laws, as in
Rating:Essay Length: 442 Words / 2 PagesSubmitted: December 27, 2009