... to be important about 20 years ago when scientists in Sweden and Norway first believed that acidic rain may be causing great ecological damage to the planet. The problem was that by the time that the scientist found the problem it was already very large. Detecting an acid lake is often quite difficult. A lake does not become acid over night. It happens over a period of many years, some times decades. The changes are usually to gradual for them to be noticed early. At the beginning of the 20th century most rivers/lakes like the river Tovdal in Norway had not yet begun to die. However by 1926 local inspectors were noticing that many of the lakes were beginnin ...
... (A.D. 129-199) maintained that experimentation led to scientific progress and is said to have been the first to conduct demonstrations with live animals--specifically pigs-a practice later extended to other species and termed "vivisection" (Loew, 1982). However, it was not until the sixteenth century that many experiments on animals began to be recorded. In 1628, William Harvey published his work on the heart and the movement of blood in animals (French, 1975). In the 18OOs, when France became one of the leading centers of experimental biology and medicine-marked by the work of such scientists as Francis Magendie in experimental physiology, Claude Bernard in experi ...
... The Siberian Tiger is a mobile creature and it lives in northern Asia and is found as for north as the Arctic Circle. It's territory is more than four thousand square miles and it will keep that territory indefinitely, as long as the food supply lasts. The Siberian Tiger hunts very much but only about one tenth of the hunts are successful. It requires more than twenty pounds of meat per day. It is heterotrophic and it's diet consists mainly of deer, boar, bear and fish. The Siberian Tiger is a solitary animal. Males and females are only together during mating season. Females will only stay with their litter of two or three cubs for less than tw ...
... for patients waiting for organ transplants. Scientists will be able to clone a fully functional organ, and replace it with the damaged one. The report on the cloning of the human's morphine receptor is advantageous to us because this helps scientists to develop new analgesics. The third section of the paper contains a brief discussion about the advantages and the disadvantages of genetic cloning. It speculates how our future will improve due to the technologies we are developing, and also the biggest drawbacks which might come from it. The last part of the paper, is the explanation of complicated terms used in this paper. The terms which will be explain ...
... of how to conduct themselves in society. They have not had time to learn the social standards of their time. So with this limited knowledge, children will consistently react to situations in a similar way that can only be explained by an instinctive nature. Have young children changed their behavior since the 1700's? I suppose any child from any culture at any time in history would cry when it was upset, physically take whatever it wanted, need a certain amount of love and attention, and also be interested in exploring things outside of it's bounds. I feel that all of these instinctive behaviors seen in young children are emotions that I, as a young adult ...
... bacteria. They elongate for 12 to 24 hours before dividing into two cells. B. burgdorferi is approximately 20 to um long and 0.2 to 0.25 um wide, with 7 to 11 flagella. More than 30 proteins are contained within B. burgdorferi1. This bacteria uses white-footed mice, mosquitoes, and deer as their hosts. This disease does not discriminate between sex and age; male and female, as well as old and young are affected. It is widely distributed around the world in the temperate zones3. A person is infected when a black-legged tick imbeds itself into them while out in the open in wodded and forested areas. This usually occurs between the months of May a ...
... warming. Oceans have a great potential for heat storage, the top two or three meters hold as much heat as the entire atmosphere. This warmth is continuously redistributed by surface and convection currents. Without the ocean there would be no life on land. Most of Earth's living space, is ocean, about 97%. And also 97% of Earth's water is ocean. There is a greater variety of living creatures in the ocean than anywhere on land. Scientists say that (including microscopic creatures) there may be 10 to 100 million unnamed species on the ocean bed alone. And that it could take up to 5000 years to classify them. The sea is a very has a very important contribution to ...
... 20%. All stars are variable to some extent; those which are visibly variable are marked with a "v". What are apparent and absolute magnitudes? Apparent is how bright the appear to us in the sky. The scale is somewhat arbitrary, as explained above, but a magnitude difference of 5 has been set to exactly a factor of 100 in intensity. Absolute magnitudes are how bright a star would appear from some standard distance, arbitrarily set as 10 parsecs or about 32.6 light years. Stars can be as bright as absolute magnitude -8 and as faint as absolute magnitude +16 or fainter. There are thus (a very few) stars more than 100 times brighter than Sirius, while hardly any are k ...
... The capacitance of a capacitor is measured in farads. A farad retains one coulomb of charge with one-volt difference of potential. that use vacuum, air, or other gases are used in applications where values of capacitance required do not have to be large, but the energy loss in the dielectric must be very small. Some applications for these are in radio- frequency circuits and low- frequency measuring circuits where great precision is required. Another type of capacitor uses castor or mineral oil for the dielectric. Oil insulated are used in applications where larger values of the capacitance are required. also use solid dielectrics such as films of synthet ...
... problems in other nations, including the Third World. Development Alcoholism, as opposed to merely excessive or irresponsible drinking, has been variously thought of as a symptom of psychological or social stress or as a learned, maladaptive coping behavior. More recently, and probably more accurately, it has come to be viewed as a complex disease entity in its own right. Alcoholism usually develops over a period of years. Early and subtle symptoms include placing excessive importance on the availability of alcohol. Ensuring this availability strongly influences the person’s choice of associates or activities. Alcohol comes to be used more as a mood-changi ...
