.... world. Marijuana is a plant, with the botanical name of . Marijuana is a weed that grows wild and is cultivated in many parts of the world. Containing 419 chemicals, this plant has the ability to intoxicate its users, primarily because of the psychoactive mind altering ingredients called Delta - 9 - Tetrahydrocannabinol, or THC. It is the THC content found at various concentration in different parts of the plant, which determines the potency. The THC content is controlled by plant strain, climate, soil conditions, and harvesting, in 1975, the average confiscated sample of marijuana contained 0.4 percent of THC, in 1979 the content was .....

.... proved water to be an oxide. The Element of Perfection Asimov talks about astronomers in the mid 1800's, and how they made the spectroscope. Only then does he start to mention a element a french chemist belived to be new or maybe just a heavier from of nitrogen. Inert gases and there liquefaction points are then listed along when they when fisrt liquefied by a chemist. Welcome, Stranger! This talks about the rarest of stable enert gases, xenon. It also tells why that in 1962 so many expirements were done involving this gas. Fisrt it defines the word gas, and talks about different types in about four pages. Thens he talks about how it .....

.... depressed may find it difficult and become overwhelmed by simple daily tasks, which is why sometimes they withdraw from daily activities altogether. They may even withdraw from families and friends. Rod Steiger an Academy Award-winning actor who had starring roles in over 72 films is clinically depressed. During a time when Rod was down he wrote a letter to his wife and son: I want to die; I don’t want to move. I have no feeling for movement. To be left alone, to disappear. Not to be bothered with washing, shaving, talking, walking, going to the bathroom. If only to get out of this tunnel and heavy darkness, cold and oily, constantly p .....

.... discovery of penicillin the 1940s proved to be the dawn of the antibiotic era. In less than two decades, major advancements had been made in the development of antibiotics. There were so many different antibiotics developed that doctors and scientists focused their attention on other problems plaguing the nation. Doctors prescribed antibiotics frequently, often when they were not even needed. According to a 1998 report by the Institute of Medicine, up to fifty percent of antibiotics are prescribed unnecessarily. This blatant overuse of antibiotics had a profound effect on the efficiency of the drugs in the future. The wonder drugs that .....

.... due to its similarity in structure to Nicatamide, a chemical found in the human brain, which directly affects the experiences of a Schizophrenic (DEA,1). On April 16, 1943, while Dr. Hofmann was measuring a fresh quantity of LSD, he accidentally dosed himself and was overcome with confusion. He was then obligated to leave work due to “a sensation of mild dizziness” and “extreme activity of imagination.”(Discovery, 2) On April 19, 1943, at exactly 4:20 pm, Dr. Albert Hofmann ingested 0.25 mg. of liquid LSD and journeyed on the first intentional “acid trip.” In 1947, Dr. Hofmann’s employers, .....

.... an almond. These glands are located behind the upper lid at the outer corner of the . After passing over the , the liquid from the gland is drained into the nose through the tear duct at the inner corner of the . Heavy laughter or crying causes muscles in the upper lid to squeeze the lachrymal gland. This produces tears that flow too fast to be drained away. The lashes catch many flying particles that otherwise would enter the . As further protection, the lids automatically close when an object suddenly moves close to the . The eye is made of 3 coats, or tunics. The outermost coat consists of the cornea and the sclera. The middle coat c .....

.... heat it derives from its metabolism is negligible. In contrast, endotherms derive most or all of its body heat from its own metabolism (Campbells,p899). Because ectotherms do not produce their own heat, they cannot actively ensure their ideal temperature for an ideal metabolic rate (aquacult.htp). In the following experiment, we will attempt to examine the relationship between metabolic rate and environmental temperature in both an ectoderm and an endotherm. I predict that for the ectotherm, the metabolic rate will increase as the outside environment temperature will increase. I also predict that the metabolic rate in the endotherm will r .....

.... capillary balls called Glomeruli. The Glomeruli pick up certain substances that travel through the Glomeruli capillary wall and enter the proximal kidney tubules, creating an ultra filtration systems, which eventually becomes urine. Substances that do not filter through the Glomeruli wall continue through the Kidneys blood supply, allowing it to reenter the renal vein and inferior vena cava. On a normal basis only small molecular weights (such as sugars, fatty acids, water, etc.) Are filtered at the renal Glomeruli. Larger waste such as proteins and hormones do not normally filter through the glomular barrier. If the Glomeruli are dam .....

.... which means a significant number of the worlds people are eating considerably less than the average of 10 pounds per week. A world population of 10 to 11 billion by mid century will have an individual allocation of 6 to 7 pounds per week, equivalent to the diet of todays members of society living in poverty. Food projections are extremely uncertain since natural disasters are unpredictable and may increase if the forecasted effects of global warming materialize. Also, environmental degradation is increasing while water allocations are decreasing. Society will not be suddenly surprised by a “crisis point� at which food supplies are n .....

.... protecting mankind has recently suffered the effects of industrialized society. This " ozone shield is dissipating " and the cause is laid primarily to man - made chemicals ( Bowermaster et al, 1990, p.27 ). If enough of these man - made chemicals are released, "the ozone layer would be weakened to such an extent that it does not filter out the sun's invisible and dangerous ultraviolet rays " ( Jones, 1992, p.36 ). Such a scenario would drastically alter society and the environment. Ozone depletion has been described as "potential catastrophe " and " a planetary time - bomb " ( Way, 1988, p.9 ). The four main areas affected by a depleted .....