Science
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4,610 Essays on Science. Documents 3,271 - 3,300
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Rabies
Though rabies has been documented since before the birth of Christ, the recent deaths from rabies of four people in the United States, who had received transplanted organs from a man infected but not actively suffering from the disease, show that the rabies continues to be a virulent and silent killer of people. Scientists speculate that rabies first appeared in Africa or Asia as five other viruses related to rabies are isolated there. As early
Rating:Essay Length: 756 Words / 4 PagesSubmitted: December 24, 2009 -
Rabies
Rabies, it kills 30-70 thousand people each year around the world (CDC). 40,000 people are treated for it each year in the United States alone (CDC). Carried by rabid animals, this viral infection poses a threat to animal lovers alike. The primary problem of rabies is prevention, the effects are severe, and the causes are many. The virus is spread by animals. Warm blooded animals are required to transmit the virus and the disease is
Rating:Essay Length: 738 Words / 3 PagesSubmitted: March 17, 2010 -
Rabies
Rabies is caused by the rabies virus which is an infectious disease that destroys the nerve cells of the brain and cause death. It is a viral zoonotic neuroinvasive disease that causes acute encephalitis or inflammation of the brain in mammals. Humans and most mammals develop this disease (HE-DC) Rabies is a Latin word, meaning rage or fury. It probably receive this name because infected animals often become excited and attack any object or animal
Rating:Essay Length: 1,003 Words / 5 PagesSubmitted: May 26, 2010 -
Raccoon Report
Raccoon Report Dylan Haines GENERAL OVERVIEW Raccoons (Procyon lotor) belong to the Procyonidae (those who came before the dogs’ family). This highly intelligent mammal has a rounded head with a short nose, small ears, and a sturdy body with minimum-length, thick, grayish brown fur. Raccoons are easily identified by a distinctive pattern of alternating black and yellowish white rings around a large bushy tail. They are also identified by a unique narrow black face
Rating:Essay Length: 951 Words / 4 PagesSubmitted: December 24, 2009 -
Radiation
Radiation as used in physics, is energy in the form of waves or moving subatomic particles. Radiation can be classified as ionizing or non-ionizing radiation, depending on its effect on atomic matter. The most common use of the word "radiation" refers to ionizing radiation. Ionizing radiation has enough energy to ionize atoms or molecules while non-ionizing radiation does not. Radioactive material is a physical material that emits ionizing radiation. This shows three different types of
Rating:Essay Length: 586 Words / 3 PagesSubmitted: January 26, 2010 -
Radicchio Salad with Easy Raspberry Vinaigrette
Radicchio Salad with Easy Raspberry Vinaigrette 16 ounces no sugar added Italian dressing (recommended: Paul Newman's) 1 cup fresh raspberries 1/4 cup sugar substitute (recommended: Splenda) 1 head radicchio lettuce, washed 1 bag fancy lettuce mix with herbs 2 Roma tomatoes, each cut into 4 wedges, optional 8 ounces hearts of palm, whole sticks 1 tablespoon minced red bell pepper 1 tablespoon minced green bell pepper To a blender, add the Italian dressing, 1/2 of
Rating:Essay Length: 397 Words / 2 PagesSubmitted: January 28, 2010 -
Radio Frequency Identification
Abstract RFID is the inventory management of the future. With the help of this technology companies will have total supply-chain visibility, improved product in-stock rates, and protection against counterfeiting. Introduction Radio Frequency Identification (RFID) is a technology that’s been touted as a replacement for Bar Code. RFID tags resemble the size of a postage stamp that has contained with in a minute microprocessor with storage capability, as well as an antenna which communicates with the
Rating:Essay Length: 835 Words / 4 PagesSubmitted: June 9, 2010 -
Radio-Imaging Effectiveness
Radiation can be used in both diagnosis and therapeutic manners. The radiation emitted from radioisotopes can destroy tissue and in the therapeutic use: the destruction of cancerous and other dangerous tissues. And with diagnosis the gamma particle pass through the body tissues with minimal damage to a gamma camera. To evaluate the effectiveness of PET, SPECT, MRI and X-rays, we first need some basic knowledge on how each of them work. PET stands for positron
Rating:Essay Length: 1,223 Words / 5 PagesSubmitted: December 27, 2009 -
Radioactive Decay
Radioactive Decay Alpha decay (пЃЎ) is the emission of an alpha particle from an atom’s nucleus; it contains two protons and two neutrons – which is equivalent to a helium-4 nucleus. When an atom emits anпЂ пЃЎ particle, the atom's atomic mass will decrease by four (because two protons and two neutrons are lost) and the atomic number will decrease by two. An example of alpha decay takes place when uranium decays into thorium by emitting
Rating:Essay Length: 1,149 Words / 5 PagesSubmitted: March 21, 2010 -
Radon
There is a phantom killer lurking in our homes, office buildings, and schools. We cannot see it, taste it, or smell it. In fact, according to the Environmental Protection Agency (EPA), it is estimated to cause between 15,000 and 22,000 lung cancer deaths per year making it the second leading cause of lung cancer deaths following cigarette smoking (EPA). This phantom is the radioactive gas called Radon. Interestingly radon is a form of radiation that
Rating:Essay Length: 1,345 Words / 6 PagesSubmitted: January 31, 2010 -
Radon Gas: Mechanisms, Effects, & Solutions
Abstract This paper discusses radon gas, which is produced as a byproduct of the natural decomposition of uranium in rocks, soil, and water. Gas build-up in enclosed dwellings such as houses, apartment and office buildings, factories, and schools is a major concern in many parts of the country. Human exposure to high concentrations of this gas for extended periods of time can be extremely damaging to health. Lung cancer has the highest mortality rate of
Rating:Essay Length: 3,980 Words / 16 PagesSubmitted: December 20, 2009 -
Random Clinical Vs. Sensitivity Tests
Random clinical trials VS. sensitivity tests According to Feinstein (1983), "although highly successful in investigating remedial therapy, randomized clinical trials have sometimes created rather than clarified controversy when the treatments were given for the complex problems involved in studying either the primary prevention of disease or the secondary prevention of adverse progression for an established disease. Another source of difficulty has been the inevitable conflicts created by two legitimate and justifiable but opposing policies regarding
Rating:Essay Length: 444 Words / 2 PagesSubmitted: July 26, 2011 -
Random Orgo Study Guide from Different Sources online
Conjugated Dienes: Introduction & Nomenclature Compounds containing more than one double bond are said to be conjugated if they possess a series of adjacent sp2 centers. In a compound such as this, the adjacent p-orbitals overlap to form a continuous p-system, as seen in the graphic below. Polyenes are named as are simple alkenes, using the multipliers di-, tri-, etc. to indicate the number of double bonds and numbers to show their positions. As with
Rating:Essay Length: 3,106 Words / 13 PagesSubmitted: March 17, 2010 -
Randomized Block Design
RANDOMIZED BLOCK DESIGN (ANOVA DUA ARAH) Desain penelitian Anova yang kedua adalah “rancangan acak” atau biasa dikenal dengan istilah randomized block design. Anova satu arah dan Anova dua arah nyaris mirip, hanya saja Anova dua arah memiliki vaiabel kedua, yaitu blocking variable. Blocking variable di sini dapat digunakan untuk mengontrol variabel pengganggu atau bersamaan (confounding or concomitant variables ). Variabel pengganggu atau variabel bersamaan adalah variabel yang tidak dikontrol oleh peneliti dalam percobaan tetapi dapat
Rating:Essay Length: 1,621 Words / 7 PagesSubmitted: December 12, 2016 -
Randy Kraft - Actions of the Serial Killer
Randy Kraft Sotey Thomas Dr. K. Dowler California State University Stanislaus This research paper is based on the actions of the serial killer named Randy Kraft. This paper will contain three separate theories that will be used to describe and possibly answer reasons why he did what he did. The three theories that will be included are rational choice and routine activities from the Choice Theory, the social strain theory from the Social Structure
Rating:Essay Length: 2,593 Words / 11 PagesSubmitted: May 5, 2010 -
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 haplotyping SNPs separated by kilobase distances were laborious and not applicable to high-throughput screening. In the case of thiopurine S-methyltransferase (TPMT), differentiating among TPMT*3A, *3B,
Rating:Essay Length: 479 Words / 2 PagesSubmitted: January 13, 2010 -
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 to Ethiopian Orthodox faith, which is more Christian-based in its theology. 2 3. Date of Birth: 1892 4. Birth Place: Harer, Ethiopia 5. Year Founded:
Rating:Essay Length: 360 Words / 2 PagesSubmitted: January 23, 2010 -
Rat О±-And Оі-Motoneurones Soma Size and Succinate Dehydrogenase Activity Are Independent of Neuromuscular Activity Level
ABSTRACT: The chronic level of neuromuscular activity, that is, activation and loading, strongly influences the morphological, metabolic, phenotypic, and physiological properties of skeletal muscles. The effects on the innervating motoneurons, however, are less established. We determined and compared the effects of 30 days of decreased activity (induced by a complete mid-thoracic spinal cord transection, ST) or near inactivity (induced by spinal cord isolation, SI) on the soma size and succinate dehydrogenase (SDH) activity of motoneurons
Rating:Essay Length: 507 Words / 3 PagesSubmitted: January 19, 2010 -
Rate of Osmosis Increases as Temperature Increases
Stephanie Parker Bio 111 Kayla McRobb 05/10/2015 Rate of Osmosis Increases as Temperature Increases Abstract: Osmosis assists the cell to reach equilibrium by the diffusion of water to create an isotonic environment. This experiment was preformed to determine whether temperature influences the rate at which water is diffused though the membranes. We hypothesized that the rate of osmosis would increase with a higher temperature. We used three different osmometers with a 40% sugar solution was
Rating:Essay Length: 1,045 Words / 5 PagesSubmitted: December 8, 2015 -
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 increased. An experiment on the effect of light intensity can be done to measure the rate of photosynthesis. You can expose samples of a plant
Rating:Essay Length: 650 Words / 3 PagesSubmitted: January 13, 2010 -
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 increased. An experiment on the effect of light intensity can be done to measure the rate of photosynthesis. You can expose samples of a plant
Rating:Essay Length: 650 Words / 3 PagesSubmitted: February 27, 2010 -
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) HCl (ml) Water (ml) CaCl2 (grams) 1 25 25 0 1 1 1 20 5 1 1 0 20 5 3 1 8 10 15
Rating:Essay Length: 374 Words / 2 PagesSubmitted: December 11, 2009 -
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 double or triple. As the liquid particles bash into the solid they may knock of a solid particle. This collision would therefore cause a reaction.
Rating:Essay Length: 857 Words / 4 PagesSubmitted: January 18, 2010 -
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 is a major factor in this as increasing or decreasing the temperature changes the movement of particles in a substance therefore changing the rate of
Rating:Essay Length: 1,363 Words / 6 PagesSubmitted: November 30, 2009 -
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 a measure of how fast or how slow something is. Rate is a measurement of the change that happens in a single unit of time,
Rating:Essay Length: 384 Words / 2 PagesSubmitted: December 1, 2009 -
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 together to form a yellow precipitate of sulphur, the equation for this reaction is: Na2 S2 O3 + HCL, H2 O + NaCL + SO2
Rating:Essay Length: 787 Words / 4 PagesSubmitted: January 18, 2010 -
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 two concentrates are hydrochloric acid and Sodium Thiosulphate. When these two concentrates interact the solution slowly turns a white colour and when left long enough
Rating:Essay Length: 523 Words / 3 PagesSubmitted: February 26, 2010 -
Raynaud Syndrome
Treatment for Raynaud’s - 2 - Introduction Raynaud syndrome is an auto-immune disorder in which blood vessels in the digits constrict. It usually strikes females between the ages of eighteen and thirty. “Between three to five percent of people are affected.” (Harvard, 2003) There is no known cause or cure. (Segala et al, 2003) Clinical features primarily deal with (but are not limited to) the digits of the fingers. Other digits that may be affected
Rating:Essay Length: 1,959 Words / 8 PagesSubmitted: December 1, 2009 -
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 conventional forms of political decision-making in favour of more proactive forms that expand civil rights and the resources of the public. Examples from the Canadian
Rating:Essay Length: 676 Words / 3 PagesSubmitted: November 16, 2009 -
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 in this experiment. The reaction rates of this chemical equation were determined experimentally. This then allowed the reaction mechanisms (i.e. orders of each component, rate
Rating:Essay Length: 504 Words / 3 PagesSubmitted: January 26, 2010