Science Essays
4,476 Science Free Papers: 3,211 - 3,240
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Rapid, Long-Range Molecular Haplotyping of Thiopurine S-Methyltransferase
Rapid, Long-Range Molecular Haplotyping of Thiopurine S-methyltransferase (TPMT) *3A, *3B, and *3C Nicolas von Ahsen,* Victor W. Armstrong, and Michael Oellerich Background: Haplotyping is an important technique in molecular diagnostics because haplotypes are often more predictive for individual phenotypes than are the underlying single-nucleotide polymorphisms (SNPs). Until recently, methods for
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Rastafarians
1. Name: Rastafarians, Rastas, or Ras Tafarians 1 2. Founder: Tafari Makonnen, pre-coronation title of His Imperial Majesty Emperor Haile Selassie I of Ethiopia. However, Selassie was more the embodiment of the Rasta faith than the actual founder of the religion. In actuality, he was known to have been devoted
Rating:Essay Length: 360 Words / 2 Pages -
Rate of Germination at Depths with Phosphorus and Without Phosphorus
Introduction and Objectives: The experiment was performed to examine rate of germination at depths with phosphorus and without phosphorus. With this experiment I hope to learn what grasses grow in certain situations. For example, what grasses grow in an environment to need quick establishment need quick establishment like a football
Rating:Essay Length: 441 Words / 2 Pages -
Rate of Photosynthesis
The rate of photosynthesis can be affected by sunlight, temperature, CO2 and O2, and any factor that influences the production of chlorophyll, enzymes, or energy carriers. The rate of photosynthesis will always correspond to that factor which is in least supply. Its rate will only increase when its supply is
Rating:Essay Length: 650 Words / 3 Pages -
Rate of Photosynthesis
The rate of photosynthesis can be affected by sunlight, temperature, CO2 and O2, and any factor that influences the production of chlorophyll, enzymes, or energy carriers. The rate of photosynthesis will always correspond to that factor which is in least supply. Its rate will only increase when its supply is
Rating:Essay Length: 650 Words / 3 Pages -
Rate of Reaction
We are trying to find out if temperature affects the rate of reaction between Hydrochloric acid and Magnesium. I think that the higher the temperature of the acid rises, the rate of reaction will increase. For example: If I double or triple the reaction, the rate of reaction will also
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Rate of Reaction
Rate of Reaction Aim My aim for this experiment is to find the rate of reaction of the following chemicals shown below in the equation furthermore I will use different concentrations of Hydrochloric acid. I will time the rates and record them, plotting them onto a graph showing the line
Rating:Essay Length: 594 Words / 3 Pages -
Rate of Reaction
Preliminary results I will gather some preliminary results to produce better final results; this will create a better accuracy in my final results as I will take my preliminary results and create a range of results where I will omit results that do not fit. Time (minutes) Gas Produced (ml)
Rating:Essay Length: 374 Words / 2 Pages -
Rate of Rusting Iron
Does the temperature affect the rate of rusting of iron? As we all know rust is composed of iron oxide. The term is applied to red oxides, formed by the reaction of iron and oxygen in the presence of water or air moisture. Given sufficient time, oxygen, and water, any
Rating:Essay Length: 500 Words / 2 Pages -
Rates of Reaction
Experiment: Investigation into the factors that effect the rate of reaction I am going to investigate how different factors affect the rate of a reaction. Introduction What is a reaction? A reaction is when two particles (reactants) join to form a new product or products. What is rate? Rate is
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Rates of Reaction
Rates of Reaction Coursework Aim The aim of this investigation is to find out and observe how temperature affects the rate of reaction. I am going to investigate the changes caused to the solution of hydrochloric acid and sodium thiosulphate when the temperature is changed. Hypothesis I know that temperature
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Rates of Reaction
Coursework - Rates of Reaction Research The rate of reaction tells us how quickly a chemical reaction takes place. It is important for people in industry to know how fast a reaction goes. They have to know exactly how much of their product they can make each hour, day or
Rating:Essay Length: 544 Words / 3 Pages -
Rates of Reaction
Sam Austin Aim: An experiment to determine if changing the concentration of a reactant alters the rate of reaction. Plan and Method In the experiment we are going to undertake, we have to add to concentrates into a chronicle flask that have been very carefully measured to 10ml. These
Rating:Essay Length: 523 Words / 3 Pages -
Rates of Reaction
Rates of Reaction Coursework Aim: To find out how different concentrations of sodium thiosulphate (Na S2 O3) affects the speed of its reaction with Hydrochloric acid (HCL). Introduction When Sodium Thiosulphate and Hydrochloric acid react they produce a cloudy precipitate. Both of the chemicals are clear solutions and they react
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Re-Licensing of Nuclear Facilities in Canada
Abstract Relatively few social scientists have studied citizen protest groups concerned with civilian nuclear power, and the relationship between political conflict over risk and regulation of the nuclear industry. Drawing from social movement research, the paper argues that anti-nuclear protests can be viewed as collective risk movements which reject
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Reac 714 Studying Sn1 and Sn2 Reactions: Nucleophilic Substitution at Saturated Carbon
REAC 714 Studying SN1 and SN2 Reactions: Nucleophilic Substitution at Saturated Carbon Date of Experiment: February 6, 2008 Objective: The objective of this laboratory experiment is to study both SN1 and SN2 reactions. The first part of the lab focuses on synthesizing 1-bromobutane from 1-butanol by using an SN2 mechanism.
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Reaction Kinetics
Reaction Kinetics: Rate of Reaction Of Tertiary-Butyl Bromide Purpose: The purpose of this experiment is to find the order of t-BB graphically, to find the k (rate constant) at 0˚ C and at room temperature, also to find the Ea (activation energy). Principles: Several different chemical kinetic principles were used
Rating:Essay Length: 680 Words / 3 Pages -
Reaction Rates of Barley Alpha Amylase with Starch at Specific Ph's and Temperatures
Reaction Rates of Barley Alpha Amylase with Starch at Specific pH's and Temperatures Page 1 Abstract Enzyme's are used as catalysts in certain reactions. They help lower the activation energy needed for the reaction to go to completion. At optimum temperature and pH the amount of collisions of substrate
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Reactions Set the World on Its Course
What do we know about our world? What do we care to figure out? Do we want to just drift along life accepting our world how it is, or is it our duty to make an attempt to understand our surroundings. I pick the latter; I believe that our view
Rating:Essay Length: 715 Words / 3 Pages -
Reason for Pause
Reason For Pause One night while watching television he first noticed it. His hand was trembling. He didn't think too much about it. He hadn't been ill. Other than the usual slowing down a bit for any man of seventy-four he was generally good health. Gradually; however, over the
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Reasons for the Cold War
The Cold War With the aim of preventing East Germans from seeking asylum in the West, the East German government in 1961 began constructing a system of concrete and barbed-wire barriers between East and West Berlin. This Berlin Wall endured for nearly thirty years, a symbol not only of the
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Recanalization Results After Carotid Stent Placement
Patient Selection Between 1997 and 2000, 52 extracranial carotid stent procedures were performed in 51 patients in whom high-grade carotid artery stenoses had been diagnosed at clinical neurologic examination and Doppler and duplex sonography. Prior to therapeutic decisions, all patients underwent diagnostic angiography and CT or MR imaging of the
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Recent Advances in Science and Technology Have Widened the Gap Between the Haves and the Have Nots - Do You Agree?
"Recent advances in science and technology have widened the gap between the haves and the have nots." Do you agree? When Malthus formulated his Malthusian theory; one that predicted the end of the world in the Year 2000, he failed to take into account the single most influential factor on
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Recent Developments in Research on the Genetics of Human Sexual Orientation
Recent Developments in Research on the Genetics of Human Sexual Orientation Human sexual orientation has been a controversy with a high tendency for debate. Lesbians, gays, supporters, and their friends are in a heated dispute about the origins of sexual orientation. There are many possibilities, spanning from personal lifestyle
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Reclaiming Clean Energy from Wastewater
Reclaiming Clean Energy from Wastewater As the Earth becomes more developed many changes in the environment are becoming apparent. These changes are unexpected and often faced with opposition from skeptics. One of these problems is global warming. Global warming is caused by the release of greenhouse gases into the atmosphere.
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Recombinant Bovine Growth Hormone
Recombinant Bovine Growth hormone Bovine Somatotropin is a naturally produced hormone by cows that aids them in milk production in made in their pituitary glands. This naturally occurring hormone can be chemically reproduced in a lab through the use of Recombinant DNA technology. Monasanto corporation produces this product known as
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Recombinant Dna Technology or Dna Cloning
Introduction The possibility of human cloning, raised when Scottish scientists at Roslin Institute created the much-celebrated sheep "Dolly" (Nature 385, 810-13, 1997), aroused worldwide interest and concern because of its scientific and ethical implications. The feat, cited by Science magazine as the breakthrough of 1997, also generated uncertainty over the
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Recrystallization
Introduction Goal: The goal of this experiment was to purify the solid compounds of acetanilide and benzoic acid by recovering the substances as pure crystals by use of a single or mixed solvent. We heated the solvent to a boil because our compounds would disassociate better in hot rather than
Rating:Essay Length: 276 Words / 2 Pages -
Recycle
Delivered on the steps at the Lincoln Memorial in Washington D.C. on August 28, 1963. Source: Martin Luther King, Jr: The Peaceful Warrior, Pocket Books, NY 1968 Five score years ago, a great American, in whose symbolic shadow we stand signed the Emancipation Proclamation. This momentous decree came as a
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Recycling
Did You Know... Each ton of recycled paper can save 17 trees, 380 gallons of oil, three cubic yards of landfill space, 4,000 kilowatts of energy and 7,000 gallons of water! Americans use more than 67 million tons of paper per year, or about 580 pounds per person. Paper products
Rating:Essay Length: 1,068 Words / 5 Pages