黑色报春花学名订正

报春花属(Primula)中花黑色之种类极少,弥足珍贵,为中国特有,近年由旅游者传人英国,深受国外园艺学界重视,并已开发成商品.对黑花报春进行了深入的分类学研究,证实其正确学名为Primula melanantha (Franch.)C.M.Hu,纠正了当前西方园艺学界应用名称的纷乱和错误.     

The Preservation Of Artificial Cultures Of Moulds

Summary

The subtidal marine algal flora of Sullom Voe was reassessed in 1983 after an interval of ten years. Only a few changes in communities were detected; these, not surprisingly, were at sites of major coastal engineering works.     

Characterization Of The S' Subsite Specificity Of Trypsin

The S' subsite specificity of bovine trypsin has been studied by partitioning of o-nitrophenylsulfenyl-L-arginyl-trypsin (formed using o-nitrophenylsulfenyl-L-arginine alkyl esters as acyl donors) between various amino acid-derived nucleophiles and water. The data obtained from spectrophotometric measurements confirmed a preference of trypsin for arginine residues in the P'₁-position, which is less marked but quite similar to that of chymotrypsin. The amides of leucine, phenylalanine, methionine, threonine, lysine and valine are better for synthesis than the corresponding methyl esters, and show a moderate nucleophile efficiency, decreasing in that order. Amides of acidic amino acids and D-leucine were ineffective in forming the peptide bond, whereas norvaline amide and dipeptide amides lead to increased aminolysis.     

The Specificity Of Processes Of Motivational Conditioning In The Human Mind

The methodological principle of the objectification of needs, which in activity theory explains the ontological development of motivation (Leont'ev, 1975), is in need of concrete psychological development to ascertain what influences and mental processes give rise to such objectification. In terms of biological motivation, this question is made easier by the existence of a detailed system of data, accumulated in conditioning studies, concerning the acquisition of the capacity to activate a person by neutral stimuli. A psychological interpretation of these data purports to explain the fact that the conditioned response phenomenon indicates not only a redirecting of unconditioned responses toward new stimuli but also the genesis, in response to this stimulus, of subjective relations orienting the person toward influences relevant to his needs. Such an interpretation therefore helps to concretize the concept of the objectification of biological needs (Vilyunas, 1986. Pp. 154-74).