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Free research essays on topics related to: substances

243 results found, view free essays on page:

  • Drug Addiction Negative Reinforcement
    4,209 words
    ... ve drugs. The Addiction Research Center Inventory, an empirically derived test designed to measure the subjective effects of addictive drugs, detects the mood-elevating effects of psychomotor stimulants and opiates on the same scale (see Haertzen and Hickey 1987). On the other hand, the subjective-effects of these two drug classes can be easily distinguished. This is not surprising considering that ex-addicts report a preference for heroin over morphine (Martin and Fraser 1961), even though ...
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  • U S Government Drug Trafficking
    1,606 words
    Approaching and addressing international drug issues in 1999 is not a simple task due to numerous contradictions that involve the inherent nature of economics, politics, culture, and individual ideologies. The normal attributes of drugs, as well as the changing characteristics of these mind-altering substances, makes them the center of complex studies that end up producing contradictory and inconclusive reports. Furthermore, confusion results from the study of available literature due to moral p...
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  • Evaporating Dish Aluminum Foil
    1,928 words
    Purpose: To conduct experiments and to determine whether they are physical or chemical changes Before we conduct these experiments there are some topics that we must discuss. As I stated in the purpose, in this lab we are going to be looking at some experiments, and we have to determine whether they are a cause of chemical or physical changes. The purpose for all the labs that we will be doing will be the same. During a chemical change a new substance is formed, it is irreversible, and it is usu...
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  • Earths Surface Organic Matter
    3,264 words
    Adhesion: Holding surface together with an adhesive Advance: The work of excavating as mining forward in an entry and in driving rooms; to extract all or part of an ore Agglomeration: A concentration process based on the adhesion of pulp particles to water in ore benefaction Alloy: A substance having metallic properties and being composed of two or more chemical elements of which at least one is an element of metal Amalgamation: The production of an amalgam or alloy of mercury Anemometer: An ins...
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  • Plant Cells E G
    840 words
    Water has importance inside cells and externally. This may be because it has interesting chemical and physical properties; it can be found naturally in all three of its states. However its molecules are bonded together by hydrogen bonds, this raises its melting and boiling points, i. e. its boiling point would be - 120 C rather than 100 C. Also because it contains slightly negatively charged oxygen atoms and slightly positively charged hydrogen atoms making it polar. Water has been called a univ...
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  • Determining Ph Of Identical Strong And Weak Solutions
    844 words
    Experiment: Determining pH of identical strong and weak solutions Date: 31 / 10 / 03 Aim: Plan and perform a first-hand investigation to measure the pH of identical concentrations of strong and weak acids. Equipment: Deionised water (H 2 O) Tartaric Acid (C 4 H 6 O 6) Citric Acid (C 6 H 8 O 7) Sulfuric Acid (H 2 SO 4) Acetic Acid (CH 3 COOH) Hydrochloric Acid (HCl) Ammonium Chloride (NH 4 Cl) Tap Water (H 2 O) Nitric Acid (HNO 3) Probe Ferric chloride (Fe Cl 3) Wash bottle Sodium Chloride in tap...
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  • Thin Layer Chromatography Drop Of The Mixture Plate
    442 words
    Chromatography is the method of separating chemical substances that makes uses of the relative rates at which they are adsorbed from a moving stream of gas or liquid on a stationary substance, which is usually a finely divided solid, a sheet of filter material, or a thin film of a liquid on the surface of a solid. It is a versatile method that can separate very complex mixtures even in the absence of detailed previous knowledge of the number, nature, or relative amounts of the individual substan...
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  • Ne F T Feel
    1,533 words
    Fr centuries, men and when have actively such after intimacy and sensuality t share with ne anther. Through the desire t please nestle and nes partner, people continue t seek after drugs and techniques that may enhance their sex lives. Bth natural and man-made substances have been fund t serve as aphrdisiac's. Aphrdisiac's, which are named after the Greek goddess f love and beauty, it seems, have been such after since beginning f time t enhance r stimulate sexual desire. In this quest fr sexual ...
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  • Evaporating Dish Aluminum Foil
    2,222 words
    Purpose: To conduct experiments and to determine whether they are physical or chemical changes Pre-Lab Notes: Before we conduct these experiments there are some topics that we must discuss. As I stated in the purpose, in this lab we are going to be looking at some experiments, and we have to determine whether they are a cause of chemical or physical changes. The purpose for all the labs that we will be doing will be the same. During a chemical change a new substance is formed, it is irreversible...
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  • Formal Reality Objective Reality
    1,646 words
    At the Descartes Essay 1 At the beginning of Meditation three, Descartes has made substantial progress towards defeating skepticism. Using his methods of Doubt and Analysis he has systematically examined all his beliefs and set aside those which he could call into doubt until he reached three beliefs which he could not possibly doubt. First, that the evil genius seeking to deceive him could not deceive him into thinking that he did not exist when in fact he did exist. Second, that his essence is...
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  • Central Nervous System Anabolic Steroids
    1,483 words
    Drug Drug Abuse Drug Abuse Drug abuse is the nonmedical use of a drug that interferes with a healthy and productive life. Drug abuse occurs from the rich to the poor and among young people as well as adults. Any drug may be abused, including alcohol and medications prescribed by a doctor. After continued use of certain drugs, some people develop drug dependence. Drug dependence can be psychological, physical, or both. A person with a psychological dependence craves a drug for the feeling of well...
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  • Patients With Severe Illegally To Produce Drugs
    526 words
    Drugs are Drugs 3 Drugs Drugs are chemical substances that alter mood, behavior, perception, or mental functioning. Throughout history, many cultures have found ways to alter consciousness through the ingestion of substances. In current professional practice, psychoactive substances known as psychotropic drugs have been developed to treat patients with severe mental illness. Psychoactive substances exert their effects by modifying biochemical or physiological processes in the brain. The message ...
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  • 19 Th Century Chemical Substances
    1,440 words
    HISTORY OF DRUG USE IN SPORT The Greeks had made sport an important part of their lifestyles by 800 BC. It was both a cultural and religious observation of the time. Not only was there emphasis on the athletics but on artistic merit also. Participants were required as a rule to write poetry, as well as perform physical feats. There were rich prizes for winner. Writing from Plato reveal that the victory in the Ancient Olympics were equivalent of nearly half a million dollars. Along with this, the...
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  • Central Nervous System Act Of 1996
    2,088 words
    Methamphetamine's are powerfully addictive stimulants that dramatically affect the central nervous system. The drugs are made easily in clandestine, or illegal laboratories with cheap over the counter ingredients. These factors combine to make methamphetamine's drugs extremely dangerous, and vulnerable to widespread use. Methamphetamine's are also commonly known as speed, meth, or chalk. In its? smoked form they are often referred to as ice, crystal, crank, or glass. They are a white, odorless, ...
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  • Cause And Effect Argument
    1,589 words
    Essay 2 First we will consider the assigned baseball scenario under Leibniz? s system of metaphysics. In the baseball scenario, the aggregate of the player, bat, pitch, swing and all the other substances in the universe are one and all contingent. There are other possible things, to be sure; but there are also other possible universes that could have existed but did not. The totality of contingent things, the bat, the player, etc. , themselves do not explain themselves. Here Leibniz involves the...
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  • Controlled Substances Act Schedule Ii Drug
    4,391 words
    Marijuana (also spelled marihuana) is a psychoactive drug made from the dried leaves and flowering parts of the hemp plant. It is one of the most strictly classified illegal drugs in the United States. Under the 1970 Controlled Substances Act, marijuana is listed as a Schedule I substance, which defines it as having a high potential for abuse and no currently accepted medical use. Marijuana is therefore classified more severely than cocaine and morphine, which as Schedule II drugs are also banne...
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  • Legalizing Marijuana Smoking Marijuana
    4,090 words
    Legalizing Marijuana for Medical Use Should we have the right to control what substances we put into our bodies? We have been denied the right to use certain substances, despite their possible medical values. The media has bombarded us with images that portray the use of marijuana as strictly a means for teenagers to get high. The truth is, behind these preconceived views, there are substantial medical values. Marijuana is a very versatile drug, and is capable of relieving a wide range of sympto...
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  • Controlled Substances Act Schedule Ii Drug
    4,569 words
    Marijuana (also spelled marihuana) is a psychoactive drug made from the dried leaves and flowering parts of the hemp plant. It is one of the most strictly classified illegal drugs in the United States. Under the 1970 Controlled Substances Act, marijuana is listed as a Schedule I substance, which defines it as having a high potential for abuse and no currently accepted medical use. Marijuana is therefore classified more severely than cocaine and morphine, which as Schedule II drugs are also banne...
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  • World Trade Center Chemical And Biological
    3,864 words
    Introduction It was another calm early morning on the subway train. Many of the passengers were napping on their way to work. The train slowed to a stop to allow more passengers on, then sped along to its destination, the central government dist right in Tokyo. Many of the passengers found it strange that a man who got on at the last stop was wearing sunglasses, but soon dismissed it remembering how safe the subways and their homeland have always been. Well, they were mistaken. The man with the ...
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  • Hydrogen Bonding Hydrogen Bonds
    414 words
    What properties of water make it a unique material and an essential component of living matter? Water is so common that it is easy to overlook the fact that it is an exceptional substance with many amazing qualities. With its properties, we can trace water s unique behavior to the structure and interactions of its molecules. Water is constructed of two hydrogen (H) and one oxygen (O). The hydrogen become + charged and the oxygen maintains a charge when they combine to form water. This is a singl...
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