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PubMedDate not supplied

Time travel and chemical evolution: a look at the outer solar system.

Many space scientists think that the chemical conditions today on planets and moons of the outer solar system are similar to conditions on Earth soon after it formed. If so, we can learn much about the chemistry that led to life on this planet. We can also speculate about exotic habitats that might have given rise to other types of life. And if we are able to discern the chemical reactions now occurring in the outer solar system, we may be able to extrapolate these rules to other solar systems, and so define the habitable zones around other stars where the potential for life is high.

Chemical Phenomena↗
PubMed1997

Drugs from the sea: harvesting the results of aeons of chemical evolution.

Despite the recent development of combinatorial chemistry for the rapid generation of thousands of new chemicals, the pharmaceutical industry still looks to the natural environment to uncover novel compounds that extend the boundaries of our chemical imagination. The terrestrial environment has been mined for such compounds for many years with great success. Now the world's oceans are beginning to yield hidden treasures. Many of these chemicals are structurally complex, stretching the prowess of modern organic chemists to their limits as they attempt to mimic the synthetic versatility of nature. In the future, these marine compounds are likely to yield entirely new classes of drugs that will be a valuable contribution to our ability to treat human disease.

Animals↗
PubMed1989

Chemical evolution and the origin of life: bibliography supplement 1985.

This bibliography is the seventeenth annual supplement to the comprehensive bibliography on the same subject which was published in Space Life Sci. 2(1970), 225-295; 3(1972), 293-304; 4(1973), 309-329 and in Origins of Life 5(1974), 505-527; 6(1975), 285-300; 7(1976), 75-85; 8(1977), 59-66; 9(1978), 67-74; 10(1980), 69-87; 10(1980), 379-404; 11(1981), 273-288; 12(1982), 93-118; 13(1983), 61-80; 15(1984), 55-69; 17(1987), 171-184; 17(1987), 185-206.

Chemical Phenomena↗
PubMed1980

The radiolysis of aqueous acetonitrile: compounds of interest to chemical evolution studies.

Oxygen-free aqueous solutions of CH3CN (0.1 M, pH 6) were exposed to gamma rays from a 60Co source, the mixture of nonvolatile radiolytic products was fractionated and the fractions were analysed. Succinic, maleic, fumaric, malonic and pyruvic acids were identified. Glycol aldehyde, glucose and probably ribose were observed in the hydrolysate of fractionated material. It has been suggested that an oligomer is formed which has a fragment with the polyhydroxy structure and on hydrolysis releases the carbohydrates. Radiolytic products which release amino acids on hydrolysis were found in several fractions. The amino acid contents of the hydrolysates were up to about 2.8% of the fraction mass. The presence of several protein and nonprotein amino acids suggests that their origin should be in a peptidic structure, which is probably a fragment of an oligomer radiolytically produced. A direct analysis of the irradiated solution shows the presence of acetaldehyde, propionaldehyde, glyoxal and of biacetyl. Experimental findings are discussed and a free-radical mechanism is proposed to account for the chemical changes observed.

Acetonitriles↗