... amino acids follows figure 1, the presence of a zwitterion is made possible due to the basic properties of the NH2 group and the acidic properties of the COOH group. The amine group (NH2) is Lewis base because it has a lone electron pair which makes it susceptible to a coordinate covalent bond with a hydrogen ion. Also, the carboxylic group is a Lewis acidic because it is able to donate a hydrogen ion (Kotz et al., 1996). Other forms of amino acids also exist. Amino acids may exists as acidic or basic salts. For example, if the glycine reacted with HCl, the resulting amino acid would be glycine hydrochloride ( ...

... can hear using operant conditioning. Once I have determined the latter, I would like to see how well a bullfrog is able to distinguish a specific frequency from other frequencies. For both experiments, I would need to obtain a number of bullfrogs from a natural habitat and place them in the lab made habitat, which would be similar to the one that they were removed from. Hopefully, the frogs will adapted to the new habitat and carry on as they did in their old habitat. Tampered bullfrogs such as those raised in labs or pets would not be used because the results would be inaccurate. The inaccuracy would be ...

... are covered with grass and trees. The savanna regions occupy the largest physical region in all of Africa. The region along the equator is made up of thick and humid forest growth. This type of physical region is located in the Congo Basin along the equator. It is important to understand the geology of Africa, because many of the diseases, which were born, had a lot to do with the climate and land region they were growing in. Africa has struggled with many different types of disease within their society due to their type of land, climate and weather. "Among all the diverse natural environments of the earth, tro ...

... to initiate our scientific and artistic endeavors. All western thought can find its roots in the philosophy and science of the Greeks, even the way we see the world is influenced by the ideologies of Ancient Greece. The Greeks were the first to seek a greater understanding of the world, to know "why" we are not just "what" we are. The Greeks invented science and explored it in its truest form, philosophy. Through the years we have developed tools that we hope can prove or disprove various hypothesizes, to further our understanding of any number of things. We divide science into categories and then sub-divide it ...

... stand. Among the list of evidence provided is that the sexual orientation of a male is influenced by heredity due to the fact that “it directly examines the genetic information, DNA.� Furthermore, if there is a gene that influences an individual's sexual orientation, there is a great possibility of that trait being passed down from generation to generation. Experiments conducted led to the possible conclusion that the region Xq28 carries a gene influencing male sexual orientation. However, there are a few flaws to their interpretation of the results. Among them are stated in the article. A replication of t ...

... by General Electric for NASA. It was considered as a definite possibility for an alternative power source for space program, but the cost and size of the fuel cell stacks were tremendous. By 1983, Geoff Ballard and a small team of physicists were able to develop the Proton Exchange Membrane (PEM) to produce nearly ten times as much energy, while being only a fraction of the size. How the PEM Fuel Cell Works: A fuel cell is an electrochemical device that produces electricity silently, without combustion. Hydrogen fuel, which is one of the most abundant chemicals in the universe, and oxygen from the air are electroch ...

... like this. A clone is a genetic copy or a replica of an living organism. But, when you gear cloning doesn't a Si-Fi movie come to mind. Like when they take a nucleus, place it in a egg, put the egg in a incubator, and when it hatches it's an exact replica of the original being (Lawren). Though this has been done with frogs it has not yet been accomplished with mammals (Lawren). Another way to make a clone, as they do in the cattle buisness, is to split the cells of a early multi-celled embryo which will form two new embryos (Lawren). For it to get started into practice it took more than fifty years of questio ...

... is generally formed, how it functions, and the effects it has on the universe. In order to understand what exactly a black hole is, we must first take a look at the basis for the cause of a black hole. All black holes are formed from the gravitational collapse of a star, usually having a great, massive, core. A star is created when huge, gigantic, gas clouds bind together due to attractive forces and form a hot core, combined from all the energy of the two gas clouds. This energy produced is so great when it first collides, that a nuclear reaction occurs and the gases within the star start to burn continuo ...

... Melting point 650ºC Boiling point 1103ºC Crystal structure close-packed hexagonal Heat of combustion 25020 kJ.kg -1 Flame temperature ~2800ºC Heat of fusion 368 kJ.kg-1 Heat of vaporisation 5272 kJ.kg-1 Specific heat 1025 J.K -1.kg at 20ºC Vapour pressure 20 Pa at 527ºC(s) 360 Pa at 650ºC (1) 1400 Pa at 727ºC Valence states Mg2+ Viscosity 1.25 cp at 650ºC (1) The magnesium element has the atomic number of 12 and atomic weight of 24.3050. It's symb ...

... ground level. The effect is comparable to the way in which a greenhouse traps heat, hence the term. Environmental scientists are concerned that changes in the variable contents of the atmosphere--particularly changes caused by human activities--could cause the Earth's surface to warm up to a dangerous degree. Since 1850 there has been a mean rise in global temperature of approximately 1° C (approximately 1.8° F). Even a limited rise in average surface temperature might lead to at least partial melting of the polar icecaps and hence a major rise in sea level, along with other severe environmental disturbances. ...