... heat was some form of fluid, much like water, that carried the heat away from the reaction. (Rothman, 69) Antoine was on the right track; he merely got on the wrong train. Benjamin Thompson, also an eighteenth century scientist, observed that while drilling through brass with a dull bit he could produce enormous amounts of heat yet not get very deeply into the brass. This led Mr. Thompson to the conclusion that heat was the product of work, not the invisible fluid caloric. Joseph Black, yet another scientist of the seventeen hundreds, discovered that it took different substances varying amounts of heat to rais ...

... and shows that these cells can be stimulated to turn into new neurons, principal author Dr. Steven A. Goldman told Reuters Health. In addition, it may lead to the development of drugs that would stimulate the formation of new brain cells in people with Alzheimer's or other diseases where brain cells degenerate, he commented. Goldman noted that the use of drugs to stimulate proliferation of new brain cells will probably result in a more successful strategy than attempting to grow the cells outside the body and then placing them back into the brains of patients, as some scientists have sug ...

... point source type is garbage. Humans dump tons of trash in the ocean on a daily basis. In 1993, the Center for Marine Conservation sponsored a nation-wide beach clean-up. Volunteers collected over 7 million pieces of trash.1 The worst offenders are commercial ships. The world fleet of commercial boats dump over 5,550,000 plastic, metal, and glass containers into the ocean in a single day.2 The most harmful of these is plastic. Sea mammals such as birds and dolphins often get tangled in the plastic six-pack rings, fishing lines, and net that humans discard into the ocean waters. Once entangled, they are unable to free ...

... advantages, due to the fact that we can harmonize international standards. Therefore environmental concern is one of the key issues that the policy makers and MNCUs should set a high priority on. This is because growth and development is strongly correlated with environmental degradation. Furthermore, it is fair to say that the MNCUs are more likely to have a more harmful environmental impact from growth and development, as opposed to the local corporations. This is because MNCUs may not be as knowledgeable as local corporations in resource utilization and land management. This also refers to the notion of Rthe ...

... between the two solutions were completed. The equivalence point was the point at which the acid was completely reacted with or neutralized by the base. The point was signaled by a changing of color of an indicator that had been added to the acid solution. Indicator was substance that had distinctly different colors in acidic and basic media. Phenolphthalein was a common indicator which was colorless in acidic and neutral solutions, but reddish pink was result in basic solutions. Strong acid (contained H+ ion) and strong base ( contained OH ) were 100% ionized in water and they were all strong electrolytes. Proced ...

... Union address, he included plans for a space station to be in orbit by the mid 1990’s. The idea of having an operable, livable, space station seemed to be inconceivable to everyone who heard that speech. As the ideas for this project began to take off, the main concern was money. How much funding would be necessary to construct a space station? At first, NASA could only work within the agency’s estimated $8.5 billion dollar budget. It was in 1984 when the first construction plan was unveiled, called “Freedom.” A “power tower” concept was designed, which is a long slender u ...

... promiscuous homosexual men but it is also transmitted sexually from men to women and women to men. Transmission is probably prevented by correct use of condoms. Health care workers and patients receiving hemodialysis are also at increased risk of infection. Effective vaccines are available for the prevention of HBV infection. All individuals at risk for infection should be vaccinated. Post-exposure prophylaxis with immune globulin is also effective for non-immune individuals after a known exposure (e. g. needle stick). Consequences of HBV Infection HBV causes acute and chronic hepatitis. The chances of becomi ...

... as washing and bathing. The solar panels generate "low grade" heat, that is, they generate low temperatures for the amount of heat needed in a day. In order to generate "high grade" heat, intense enough to convert water into high-pressure steam which can then be used to turn electric generators there must be another method. The concentrated beams of sunlight are collected in a device called a solar furnace, which acts on the same principles as a large magnifying glass. The solar furnace takes the sunlight from a large area and by the use of lenses and mirrors can focus the light into a very small area. Very ...

... a central nucleus, composed of protons and neutrons. each electron carries one negative charge and each proton one positive charge. Neutrons carry no charge. Every atom has the same number of electrons as there are protons, so, on the whole, it is electrically neutral. The electrons have discrete kinetic energy levels, which increase with the orbital radius. When atoms bond together to form a solid, the electron energy levels merge into bands. In electrical conductors, these bands are continuous but in insulators and semiconductors there is an "energy gap", in which no electron orbits can exist, between the i ...

... rate of extinction (Lampton 14). Species have slowly evolved and disappeared throughout geological time because of climate changes and the inability to adapt to survive competition and predation. Since the 1600's, however, the rate of extinction has accelerated rapidly because of human population growth and resource consumption (17). Today, most of the world's habitats are changing faster than most species can adapt to such changes through evolution, or natural selection. The current global extinction rate is estimated at about 20,000 species per year, exponentially greater than the background extinction ...