|
Enter your query below to search our database containing over 50,000+ essays and term papers
Search results 4181 - 4190 of 14240 matching essays
- 4181: Malthus' Principle of Population: Today and the Future
- ... on the starchy foods of grain products. In general, it appears that an affluent society lives on about 17pounds per week per person while people at the poverty level subsist on about a pound a day, or seven pounds per week per person. Italy dines on a reasonable balance between meat and grain and has one of the worlds highest life expectancies. Our Future Diet World food production has been keeping ... if the forecasted effects of global warming materialize. b) The ability to control environmental degradation is becoming increasingly difficult. c) The impact of problems with allocating scarce water are just now beginning to be appreciated. d) The depletion of non-renewable resources such as fossil fuels (gas, oil, etc.) needed for farming and distribution will contribute to the increasing costs of dwindling food supplies. Grain Harvest Projections World farmland planted in ...
- 4182: Quantum Theory?
- Quantum Theory? An important aspect of understanding of one's position is to appreciate where one came from, explains Prince Louis de Broglie Ph.D., who wrote a thesis on quantum mechanics (Thomas 2). This is also true of modern science. Though admittedly more complex, it is possible to follow a path through the last four centuries up to the ... our universe and others. This scientific discovery could change life in the same way the transistor changed the course of modern electronics. Teleportation is another issue that is blazing its way through development this very day. The world was shocked in 1998 when they heard the news: Quantum teleportation was demonstrated in three laboratories around the worldin Innsbruck, in Rome, and at Cal Tech. Physicist Jeff Kimble, the leader of ...
- 4183: Could Air Pollution Have A Negative Impact On Water Quality?
- ... any release to the environment in excess of 1 pound should be reported. For short-term exposures, EPA concludes that drinking water levels should not exceed 0.5 mg/L (0.5 ppm) for one day or 0.04 mg/L (0.04 ppm) for 10 days7. Toxaphene has been measured in the following food sources: oils and fats, root vegetables (such as carrots), meats, grains, and fish. The average daily intake of toxaphene from contaminated food has been estimated to be 1.6 g/day for an adult. The estimated average intake of toxaphene through inhalation of outdoor air is 0.4-0.33 g/day. Acceptable levels in fish are set in the U.S. by an FDA limit of 5 parts per million10. Fish consumption is a major exposure route because toxic substances such as mirex and toxaphene ...
- 4184: Venomous Creatures of the West Pacific
- ... to climb vertical surfaces. Some forms have the ability to burrow into crevices in rocks, while others cover themselves with shell, sand, and bits of debris. Some urchins are nocturnal, hiding under rocks during the day and coming out to feed at night. Echinoids tend to be omnivorous in their feeding habits, ingesting algae, mollusk, foraminifera, and various other types of benthic organisms. Sea urchins are dioecious, hermaphroditism occurring only as ... forms, which stay on the bottom reach maturity. The adults may then be found swimming at the surface. Light-sensitive cubomedusae, however, descend to deeper water during the bright sun of the middle of the day and come to the surface during early morning, late afternoon, and evening. Millions of cubomedusae have been observed hovering about 30cm above the sandy bottom of some of the bays between Adelaide and Cape Jervis, Australia. Most of the specimens within the half-meter thick layer are found lying at an oblique angle, which is the customary position for the cubomedusae during such periods of inactivity. During the day the jellyfish ascend and gradually disperse in a zone ranging from the surface to a depth of 6m or more. Stings from Chironex and Chiropsalmus can be dangerous. Usually the effects consist of extremely ...
- 4185: Cladocerans
- ... in the sediment at the bottom of the lake or pond until spring at which time the eggs hatch. 1. Daphnia magna. Take a small culture dish to the instructor to receive a few living D. magna. This is a very large species, as cladocerans go, and one that is easily cultured in the laboratory. Return to your bench and observe the animals using the dissecting microscope. Note the characteristic jerky ... them and note that they are movable. If you look closely, you should be able to see the small muscles that are responsible for this motion. They extend posteriorly from the eye. Many cladocerans, including D. magna and D. pulex, have a single, tiny, median, naupliar eye or ocellus posterior and ventral to the much larger compound eye. It is embedded in the edge of the brain which may be visible with careful ...
- 4186: Earth's Climate and Seasons: How Do They Relate?
- ... 40%N latitude because the rays sort of fan out from the equator. While the earth is revolving around the sun, it is also rotating on its own axis. One full rotation equals one day or twenty- four hours. At the middle of the day, noon, the sun is as direct as it can be, and this is also the hottest time of the day. But, when Earth makes one half turn, it changes to night when all of the air cools off, because the sun is on the opposite side of the earth. Without night, Earth would become ...
- 4187: Plants in TKM
- ... Azaleas, and the big shady Live Oak, help make life a lot better in the South during the Great Depression by giving Southerners a sense of uplifting. Big bright flowers, growing higher and brighter every day, are very relaxing on a hot summer day. Canna, in the cannabis family, is a big plant with showy flowers (Canna 1). The big bright flowers help keep the spirits of the town dwellers and country people high and healthy. In temperate areas ... the United States; it is used widely as veneers, in mill work, and in paper-making" (Magnolia 1). This tree can, at its highest, reach more than 150 feet. During the hottest part of the day, there is nothing better than taking a nice long nap under a bit of shade. Live Oak is a very huge tree, it can be up to fifty feet tall and branches can be ...
- 4188: The Destruction of Red Tides
- ... the central nervous system of fish so that they are paralyzed and can't breathe. As a result, red tide blooms often result in dead fish washing up on beaches. From biblical times to present day this killer of marine animals and health risk to humans is affecting rivers and coast lines all over the world. Despite how long we have known about red tides there is not much we can ... 19, 1996) Fast growing algae quickly strip away nutrients in the upper layer, leaving nitrogen and phosphorus only below the interface of the layers, called the pycnocline. Many swim at speeds of 10 meters a day, and some go through vertical migration rising to the top of the water to get sun and then swimming down to the pycnocline to take up nutrients at night. Another cause of red tides is ... toxins and HAB species for application in monitoring; ballast water temperatures; and determination and treatment of the effects of chronic exposure on human health." With further research and extensive studies on red tides hopefully one day a definite way of prevention will be known. Bibliography New York Times: "A Spate of Red Tides Is Threatening Coast Line", August 27, 1996 New York Times: "Thousands of Gulf Fish Die; Red Tide ...
- 4189: Alchemy
- ... The first practical alchemist may be said to have been the Arbian Geber, who flourished 720-750. From his "Summa Perfectionis", we may be justified in assuming that alchemical science was already matured in his day, and that he drew his inspirations from a still older unbroken line of adepts. He was followed by Avicenna, Mesna and Rhasis, and in France by Alain of Lisle, Arnold de Villanova and Jean de ... in the forties of the last century he frequented the laboratory of a certain Monsieur L., which was the rendezvous of the alchemists in Paris. When Monsieur L`s pupils left the laboratory for the day, the modern adepts dropped in one by one, and Figuier relates how deeply impressed he was by the appearance and costumes of these strange men. In the daytime, he frequently encountered them in the public ... he could nothing in common with those of his strange companions. He confounded the wisdom of the alchemical adept with the tenets of the modern scientist in the most singular fashion, and meeting him one day at the gate of the Observatory, M. Figuier renewed the subject of their last discussion, deploring that " a man of his gifts could pursue the semblance of a chimera." Without replying, the young adept ...
- 4190: Flooding
- ... solutions, but the various factions, or at least those represented in a November 1997 Conference, have arrived at a point where they can speak civilly to each other about their serious common problems. The one-day Conference, Coastal Hazards, Changing Climate, and the New Jersey Shore, held at Toms River, the capital of Ocean County , and sponsored by the US Environmental Protection Agency, the New Jersey Department of Environmental Protection, the ... and 4) Toyota developing a hydrogen fuel cell vehicle. Meanwhile EPA is working closely with industry to develop greater energy efficiency. He recommended overhaul of World Bank policies and a change in industrial countries R&D investment priorities away from fossil fuels and toward renewables and energy efficiency technology. The best way to steer people into lowering CO2 emissions is by enlisting market forces, said David Bardin of a Washington law ...
Search results 4181 - 4190 of 14240 matching essays
|
