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The Capillary Method, 2003.
Examines surface tension measurements of pure water, NaCl solutions, and HOAc solutions using the capillary rise technique.
2,048 words (approx. 8.2 pages), 4 sources, MLA, $ 64.95
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Abstract
This paper is a technical report on a laboratory experiment on surface tension measurements using the capillary rise method. Samples are deionized water and varying concentrations of NaCl and of HOAc. Calculations are included in the appendix.
From the Paper
"Increasing concentrations of HOAc solutions tend to lower surface tension of water, while NaCl solutions increase surface tension of water. The former results to a condition called positive surface concentration, where the solute tend to concentrate slightly in the neighborhood of the surface; the latter is due to negative surface concentration, where the solute molecules become less concentrated in the neighborhood of the surface."
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Oxygen, Radon, and Lead, 2002.
An examination of the elements oxygen, radon, and lead.
2,972 words (approx. 11.9 pages), 6 sources, MLA, $ 87.95
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Abstract
This paper provides a scholarly examination of the elements oxygen, radon, and lead, including who discovered them and when, how they are isolated from the environment, and some of their commercial applications. An analysis of what the impact of the loss of these elements on life and society is also provided.
From the Paper
"Dmitri Mendeleyev's discovery of the Periodic System can be traced to when he first began his scientific work in 1855. At this time, the central axiomatic assumption of chemistry was the notion of a chemical ?element.? Tennebaum says that this notion was associated with the idea that researchers cannot differentiate or divide substance down indefinitely, without encountering some kind of a limit, boundary or, ?singularity? (Tennenbaum, 1994, p. 3). In the specific practice of chemistry up to the time of Mendeleyev, the exploration of this area took the form mainly of what are called chemical separation methods as distillation, precipitation, electrolysis, centrifugation, and so forth (Tennenbaum, 1994, p. 4). It was through this type of exploration that chemists that chemists had discovered about 64 elements at the time of Mendeleyev?s initial research. The French chemist Antoine Lavoisier, on the other hand, adopted the view that these chemical elements are ?singularities? (moments of change, in a search not for ultimate building blocks, but for what he called the ?principles'' of matter."
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Madame Marie Curie: Early Martyr to the Atomic Age, 2004.
A comprehensive analysis of Madame Marie Curie's life and contributions.
1,658 words (approx. 6.6 pages), 4 sources, MLA, $ 53.95
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Abstract
This paper provides a scholarly biography of Marie Curie and an assessment of her unique contributions to humanity, followed by a summary of the research in the conclusion.
From the Paper
"Albert Einstein said she was "the only person to be uncorrupted by fame" (Davis 1986:1). Marie Curie (n?e Maria Sklodowska) was born September 12, 1897, in Paris and died there on March 17, 1956 (Marie Curie 2004). While many people suggest that it takes 35 years to become an overnight success, Marie Curie was successful from the outset and while her personal life was marred by tragedy, her professional career has been widely recognized as being an early example of the contributions women in the scientific community could make given the opportunity. According to Lydia Davis, Curie ?was a proud, passionate, and hard-working woman who played an important role in her time because she had the ambition and the means to do so, and who has played an important role in our own time too, since there is a direct relationship between Marie Curie-Sklodowska and atomic energy. It was also atomic energy that caused her death? (1986:2)."
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Equine Nutritional Secondary Hyperparathyroidism, 2004.
An explanation of the causes and treatments of NSH.
1,406 words (approx. 5.6 pages), 16 sources, MLA, $ 46.95
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Abstract
A research paper on Equine Nutritional Secondary Hyperparathryroidism (NSH). Discusses causes of the disease, clinical symptoms, diagnosis, treatment, and prevention. The paper includes many references from medical and veterinary journals, Internet sites, and research on the topic. The writer also interviewed some experts in the field to gain an understanding on this disease.
From the Paper
"Calcium and phosphorus, two very important minerals, make up approximately 70% of the total mineral content in the equine body. Most people, including young children, have seen the milk commercials on television that inform their viewer of the important role that calcium plays in creating strong, healthy bones. Calcium plays this role in many species and is especially important in large breed animals such as the horse, who is often asked to perform hard work and athletically challenging tasks. In addition to creating strong bones in the equine body, calcium is also important for several metabolic functions such as nerve conductions and muscle contractions. Without a sufficient amount of calcium, the horse?s bones would grow weak and he would be at greater risk for injury. Due to the importance of these vital functions of calcium, the equine?s body closely regulates the levels of calcium in the bloodstream. Vitamin D and hormones such as the parathyroid hormone (PTH) play an important part in maintaining adequate calcium levels in the blood stream. When there is not enough calcium in the horse?s diet the PTH begins to break down calcium from the bones, which store 99% of the body?s calcium, and moves it into the bloodstream. When there is a long-term deficiency of calcium in the equine?s diet, significant re-absorption of bone can occur, which can lead to decreased bone strength and density, or abnormal bone formation. Many racetrack injuries, laminitis, and tendonitis have been attributed to inadequate calcium in the diet of young racehorses. Even if there is adequate calcium, a large concentration of other minerals such as phosphorus will decrease the absorption of calcium. Thus, there must be a balanced ratio of these minerals. If improper Ca:P levels in the diet continue for an extended period of time, serious problems such as nutritional secondary hyperparathyroidism will develop.
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Firefighting and Carbon Monoxide, 2004.
This paper discusses the problem of carbon monoxide when fighting fires and devices that prevent the inhalation of carbon monoxide by firefighters.
1,305 words (approx. 5.2 pages), 4 sources, APA, $ 44.95
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Abstract
This paper explains that, while many poisonous vapors may be present during a fire, carbon monoxide has characteristics that make it particularly dangerous because it causes oxygen deprivation. This author suggests that the solution for firefighters is a piece of equipment called a SCBA (self-contained breathing apparatus), which includes a face mask, bottled air supply, a regulator to control pressure, and a harness to carry the apparatus on the firefighter?s back. The paper stresses that fire departments must replace all their breathing apparatus at once so they are standardized, and every firefighter has the same level of protection.
From the Paper
"When SCBA devices were first developed, they were sold as units. Today, however, most departments buy each piece of apparatus separately. This means that each firefighter has his or her own face mask, which reduces the chance of contagious illnesses being spread because multiple users used the same mask while one of them was coming down with something. In addition, departments need to buy extra masks in case masks get damaged. They also need extra bottles, because one bottle per firefighter may not be enough air, making a bottle exchange necessary. This makes it even more important that components be compatible with one another."
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Water Pollution Treatments, 2004.
An explanation of the various methods of water pollution treatment.
2,678 words (approx. 10.7 pages), 2 sources, MLA, $ 80.95
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Abstract
This paper explains that there are are two major types of water pollution treatment: physical and chemical. The paper goes on to explain the various methods of physical treatment, including filtration and air- or steam-stripping. Chemical treatments are for killing microbes in the case of bacterial pollution, but they may be used for altering the chemical makeup of the water to render it less harmful in the case of chemical pollution.
Contents
Three Major Problems
Sediments
From the Paper
"Chemical treatments, generally, are for killing microbes in the case of bacterial pollution, but they may be used for altering the chemical makeup of the water to render it less harmful in the case of chemical pollution. Often, this sort of treatment is used to remove metal compounds from the water. Various materials such as dissolved iron or aluminum salts may be added to help the material to be removed either float or settle, again, depending on how it is to be ultimately removed.
Often, organic chemicals in water can be chemically destroyed by adding ozone or hydrogen peroxide. The ozone may also kill harmful bacterial, or chlorine may be added to do this. But of course, excess chlorine itself is harmful to aquatic life, so sulfur dioxide may then need to be added to make the ?pure? water safe for discharge. Finally, chemicals may be added to water in a treatment system to help create thicker ?sludge? so that the remaining water may be more easily removed."
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The Biochemistry of Lead Poisoning, 2003.
A look at the chemical mechanisms and biological effects of lead poisoning.
1,395 words (approx. 5.6 pages), 9 sources, MLA, $ 46.95
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Abstract
This paper describes lead poisoning, focusing on the chemical processes that take place as lead (II) displaces zinc (II) from ALAD and inhibits hemoglobin synthesis. The technical details of the inorganic and biochemical processes at play are explored and discussed, as well as the mechanisms of various lead poisoning therapeutic strategies. This paper also contains several referenced illustrations and figures.
From the Paper
"The protein ALAD, also know as porphobilinogen, is crucial in heme biosynthesis (2). ALAD, a ZnII metalloenzyme, consists of A and B subunits each of which contain a zinc atom when functional. The functionality of the A and B sites has been determined experimentally by displacement of zinc. When magnesium displaces zinc at the A site ALAD is marginally active. Furthermore, when magnesium replaces the zinc in the B site no change in the activity of the enzyme is observed (3). Thus the A site is key to the activity of the enzyme. However, when PbII displaces the active ZnII ion present in the A- site, the enzyme is rendered useless."
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Ionic Liquids, 2004.
Provides information about ionic liquids and their unique properties.
4,075 words (approx. 16.3 pages), 20 sources, MLA, $ 109.95
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Abstract
This work provides information on the properties of ionic liquids and explores how these unique properties can be used to conduct experiments that would not be possible without ionic liquids. The paper also examines the future potential of ionic liquids.
From the Paper
"One of the principal driving forces for research in this area is the need to find replacements typical solvents because they are environmentally damaging. This is because they are used in large amounts and they are volatile. Ionic liquids are different from conventional liquids. They are not composed of molecules, polar like water or acetone, or even non-polar like benzene. These liquids are composed of ions. This class of compounds came into being since the 1980s. Since these are liquids, they have the potential to behave as solvents. Which means that potentially there are a million possible solvents that can be created. By combining different anions and cations, it is possible to create a huge library of different ionic liquids each with specific properties. There are at best, 300 organic solvents that are in use in chemical and pharmaceutical industry, today."
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Magnesium Chloride, 2004.
A discussion of the pros and cons of the use of magnesium chloride as a de-icing agent.
1,228 words (approx. 4.9 pages), 6 sources, MLA, $ 41.95
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Abstract
This paper discusses how magnesium chloride has become the de-icer of choice in snowy regions such as Colorado and how supporters of the product claim that magnesium chloride is an environmentally safer option for de-icing than some of its predecessors, namely, sodium chloride. It examines how the use of magnesium chloride in liquid and modified cold-pressed form has been shown to be highly effective as a tool for de-icing in Colorado. It also looks at how supporters of the use of magnesium chloride in Colorado have stated that the de-icer has proven beneficial to the environment, while others claim the use of magnesium chloride has been shown to possibly increase electrical outages and pole fires, as well as corrosion.
From the Paper
"Another environmental issue facing Coloradoans resulting from the use of magnesium chloride is corrosion. The use of sodium chloride or rock salt in the past presented a much greater problem in this respect. Magnesium chloride however, is also by nature corrosive; however proponents of its use point out those chemical agents are added to it to minimize the corrosive effects (Pavek, 2002). Highway departments in the state of Colorado have noticed that the use of magnesium chloride as a de-icer has reduced much of the major corrosion on trucks and equipment, as well as steel enforced bridges compared to sodium chloride (Pavek, 2002). However, some reports are also indicating that aluminum components and electrical components in their vehicles are actually showing increased evidence of corrosion at a more rapid rate (Pavek, 2002)."
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Napalm, 2004.
An analysis of the impact of napalm on the 20th century.
1,158 words (approx. 4.6 pages), 2 sources, MLA, $ 39.95
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Abstract
This paper discusses how napalm, a chemical made by thickening gasoline with the aluminium salt of naphthenic and palmitic acid, was first developed in the United States during World War II and was used in the Korean War and then the Vietnam War. In particular, it examines how its use in the Vietnam War has had the most impact on the 20th century. It looks at how the widespread use of napalm contributed to ideas on the strategies of war and how the impact of napalm in the Vietnam War changed how the public viewed the war, which led to changes in the way the public was viewed in a war situation.
From the Paper
"The first impact of Napalm is the effect it has had on the strategies of war. One text titled The American Way of War: A History of United States Military Strategy and Policy, describes America?s approach to war as always being an attempt to reach total war (Weigley). This means not just fighting the forces of the opposing country, but fighting the country itself to cause their surrender. In more modern times, the recent war on Iraq can be given as an example, where American forces do not only fight against the soldiers of Iraq but bomb heavily to limit their ability to fight. With this approach, the goal is to maximize damage to the opposing country so they surrender quickly and the damage to American forces is minimized. If this approach is what America was attempting, Napalm became a way of achieving it in the Vietnam War."
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Gilbert Newton Lewis, 2003.
Discusses the scientist's contributions to the field of chemistry.
675 words (approx. 2.7 pages), 2 sources, $ 23.95
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Abstract
Discusses Lewis's original work in thermodynamics and valence theory, his academic background and career as a faculty member at MIT and UC Berkeley, his scientific research and theories of electrons bonding in pairs.
From the Paper
"Scientist Gilbert Newton Lewis' reputation lies in his extensive contributions to the field of chemistry. Lewis was born in Weymouth, Massachusetts on October 23, 1875. He was schooled at home by his parents in his early years, and at age 14, entered the..."
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Lead Halides, 1998.
A paper analyzing the physical and chemical properties of the lead (II) and lead (IV) halide compounds. Comparisons between compounds and applications are also discussed.
5,644 words (approx. 22.6 pages), 28 sources, APA, $ 136.95
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Abstract
After a brief historical introduction to lead compounds, it explains what +2 and +4 cations are and examines their uses. The physical and chemical properties of the lead (II) halides are also discussed, with mention of "mixed" halides (e.g., PbFCl).
Outline
An Introduction to Lead
General Lead Dihalide Trends
Mixed Lead Halides
Lead Chloride
Lead Bromide
Lead Iodide
Lead Fluoride
Lead Tetrahalides
Lead Tetrafluoride
Lead Tetrachloride
Possible Lead Halide Application
From the Paper
"Lead, located at the bottom of group IVA on the periodic table is well known for being a massive (atomic mass is 207.2 amu) and dense element. The density characteristics associated with lead arise from its rather compact structure despite its large size. This occurs in accordance to the periodic trend that atom size decreases as one moves left to right across a period. This trend, in conjunction with the massive properties found among the period six elements, accounts for the elements ranging from osmium to lead in that row being the densest (osmium does have the largest density) known to exist."
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Current and Future Trends and Applications in Nanotechnology, 2003.
A comprehensive review of the relevant literature to develop a better understanding of the emerging technology of nanotechnology.
2,287 words (approx. 9.1 pages), 13 sources, MLA, $ 70.95
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Abstract
This paper provides an insight into nanotechnology, an anticipated manufacturing technology that is intended to provide thorough, inexpensive control of the structure of matter through the manipulation of individual atoms. Topics discussed include the definition of nanotechnology, the ultimate goals, and potential hazards of the technology, as well as the companies, both privately and publicly owned, that are involved in the field. It looks at some of the products of nanotechnology and describes how nanotechnology can be used in our daily lives. It also discusses the role the government currently plays in funding research into nanotechnology applications. A summary of the research is provided in the conclusion.
From the Paper
"The term, ?nanotechnology,? was proposed by K. Eric Drexler. The Institute of Nanotechnology advises that nanotechnology can best be considered as a ?catch-all? phrase used to describe activities at the level of atoms and molecules that have applications in real world settings. A nanometer is a billionth of a meter (about 1/80,000 of the diameter of a human hair, or 10 times the diameter of a hydrogen atom) (Nanotechnology ? What Is It?, 2002). Nanomaterials are defined as particles having a size in the range of 1-100 nanometers that exhibit unique physical and electrochemical properties, thereby enabling the manufacture of stronger, harder, more wear-resistant materials."
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Dark Energy, 2003.
An overview of dark energy, the equation of state, and theories of universe expansion.
1,153 words (approx. 4.6 pages), 7 sources, MLA, $ 39.95
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Abstract
This paper describes dark energy, or anti-gravity, and debates theories of universe expansion, touching on Einstein's theory of relativity and cosmological constant. It also talks about the equation of state of the universe and its impact on universe expansion or contraction. It looks at how there are many theories about dark energy from the quintessence theory and the topological defect theory to the cosmological constant theory. It explains that, by analyzing the equation of state of this energy and evaluating current theories, scientists can construe a plausible theory for the fate of the universe.
From the Paper
"Physicists started negotiating and theorizing about the possibility of a dark energy around the turn of the century. One generally un-disproved theory from that time is that which relates the equation of state to the ?cosmological constant?. The cosmological constant (often called lambda) was proposed by Einstein in 1917 to make the universe unchanging in his equations (5). He was generally unsure of this idea, and rejected this theory shortly after it was determined that the universe is perpetually growing. However, his idea of a cosmological constant is currently applied to the universe in a slightly different way, setting the equation of state constant (5)(4). The current theories of dark energy date back to 1998 when supernovae were discovered to be dimmer than expected."
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Fragile X Syndrome, 2003.
An overview of the genetic disease, Fragile X Syndrome.
3,634 words (approx. 14.5 pages), 16 sources, MLA, $ 101.95
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Abstract
This paper examines Fragile X syndrome, also known as Martin-Bell syndrome, one of the most frequently inherited forms/causes of mental retardation. It looks at how the disorder is derived from a genetically inherited, single-gene mutation and how individuals who have Fragile X syndrome have symptoms that are resultant from a mutated gene on the X chromosome. It provides a short introduction, the genetics behind the disease, the mechanisms of the protein production and lack of therapy, diagnosis and symptoms.
From the Paper
"The cause of Fragile X all boils down to a change in a single gene: an alteration in the Fragile X Mental Retardation 1 (FMR1) gene. The mutation inactivates the FMR1 gene, which in turn interferes with the process involved in regulating FMRP protein content. This gene is located on the X chromosome, hence the name Fragile X syndrome. Current research indicates that the FMRP protein assists in cellular communication.3 The sex chromosome alleles for males and females are XY and XX, respectively. This establishes an understanding that Fragile X syndrome, involving the X chromosome, is a sex-linked trait. Since males and females contain either one or two X chromosomes, either can pass on the mutated gene to their offspring."
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The Mitsunobu Reaction, 2003.
An analysis of the chemical reaction known as the mitsunobu reaction.
1,228 words (approx. 4.9 pages), 17 sources, APA, $ 41.95
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Abstract
The mitsunobu reaction, discovered in 1967, involves the stereospecific reaction of an alcohol and a carboxylic acid in the presence of triphenylphosphine and diethyl azodicarboxylate (DEAD) to give an ester. This paper provides an overview of this chemical reaction and presents explanations via numerous diagrams and figures.
From the Paper
"In 1976, it was found that the formation of nitriles is also easily reached when cyanide is used as a nucleophile under Mitsunobu conditions.10 Recently, however, acetone cyanohydrin has been used as a source of hydrogen cyanide for this reaction (see figure 7). With a comparable yield and a less toxic reagent, acetone cyanohydrin is a suitable replacement for HCN.11 In this system, similar to other Mitsunobu systems, sterically hindered secondary alcohols tend to give poor yields."
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Epilepsy, 2002.
An overview of the disorder of epilepsy.
2,732 words (approx. 10.9 pages), 10 sources, MLA, $ 81.95
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Abstract
This paper looks at epilepsy and discusses the different types, symptoms, medication and social impacts as well as its treatment and aftercare. It includes basic understanding of the pathophysiology of the disease process and how drug actions and chemicals in the brain thought to contribute to the disease.
Outline
Disease Classification
Normal? Physiology and the Effects of the Disease
Treatment for the Disease
Patient Care
From the Paper
"The symptoms of Epilepsy, in my opinion and using the aforementioned evidence, definitely reflect the effects of the disease on the ?normal? physiological functioning of the body. The chaotic, unregulated neuronal discharge in the cortex seems to have, from a simplistic point of view, a direct and visible correlation with the chaotic events, muscular spasm and loss of involuntary functions e.g., Breathing, bladder control or swallowing. The complexities of diagnosis and detection of the areas of brain cortex responsible for the discharge are made somewhat easier by the use of EEG, this also simplifies diagnosis of each individual as well as identifying which strain they may have. Although Monton (1985) does state that EEG has its limitations and therefore requires clinical assessment to be used in conjunction with EEG for effective and accurate investigation and diagnosis."
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Lactase Enzyme, 2003.
A short essay outlining the biochemical nature of the lactase enzyme.
983 words (approx. 3.9 pages), 8 sources, MLA, $ 34.95
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Abstract
This essay talks about the biochemical nature of the enzyme lactase. The paper includes a discussion of it's production, the reaction it catalyzes and the physiological effects of this enzyme. In particular the essay includes an explanation of the physiological effects experienced with a deficiency of lactase.
From the Paper
"Lactose is a disaccharide that is the principal carbohydrate found in milk and other dairy products. To digest lactose the enzyme lactase is required to catalyse the hydrolysis reaction to produce the monosaccharides glucose and galactose. This enzyme is usually present at birth but often decreases in activity as the child matures. The condition where an individual has a deficiency of lactase is known as lactose intolerance and produces symptoms such as nausea, cramps, bloating, gas, and diarrhea"
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