The hydrolysis of proteins

Temperature effects on hydrolysis reaction in protein amino acid

Gas-liquid chromatography of amino acids in biological substances

Developing gas-liquid chromatographic method for quantitative analysis of amino acids in blood plasma and urin

A study of ASRS reports involving general aviation and weather encounters

Consideration is given to the nature and characteristics of problems involving dissemination of weather information, use of this information by pilots, its adequacy for the purpose intended, the ability of the air traffic control system to cope with weather related incidents, and the various aspects of pilot behavior, aircraft equipment, and NAVAIDS affecting flights in which weather figures. It is concluded from the study that skill and training deficiencies of general aviation pilots are not major factors in weather related occurrences, nor is lack of aircraft equipment. Major problem causes are identified with timely and easily interpreted weather information, judgement and attitude factors of pilots, and the functioning of the air traffic control system

The absolute photometry of the zodiacal light

Absolute photometry of zodiacal ligh

The case for negative senescence

Negative senescence is characterized by a decline in mortality with age after reproductive maturity, generally accompanied by an increase in fecundity. Hamilton (1966) ruled out negative senescence: we adumbrate the deficiencies of his model. We review empirical studies of various plants and some kinds of animals that may experience negative senescence and conclude that negative senescence may be widespread, especially in indeterminate-growth species for which size and fertility increase with age. We develop optimization models of life-history strategies that demonstrate that negative senescence is theoretically possible. More generally, our models contribute to understanding of the evolutionary and demographic forces that mold the agetrajectories of mortality, fertility and growth.

Approximate solutions of problems involving normal operators

AbstractThe spectral theory for unbounded normal operators is used to develop a systematic method of approximating functions of operators with other, more easily computable functions, leading to a priori error estimates in the operator norm. In particular, polynomial approximations are obtained for resolvents and semigroups in terms of inverses and resolvents, respectively

Pattern-Based Parsing for Word-Sense Disambiguation

In the study of natural language understanding, the reductionist approach has been commonly used by A, I. researchers. Here we develop a technique for parsing based on this approach. W e use a set of semantic primitives to represent word meanings and utilize patterns of sentences for mapping sentences onto meaning structures. To assist the parsing process,w e develop semantic mappings for primitive sentences, semantic transformations for decomposing complex sentences using function word sand axioms that encode world knowledge. W e then explore the application of our approach to the word polysemy problem