ISSN:1310-2818    

DOI:10.1080/13102818.1995.10818850

出版商:Taylor & Francis    

年代:1995

数据来源: Taylor

摘要:

In one plant Raphanus raphanistrum with mosaic symptoms the Radish mosaic virus (RaMV) was established for the first time in Bulgaria. This virus was identified by biological test, indexes for the stability of the sap “in vitro” serological agar-gel diffusion test and tests for transmission by aphids.

ISSN:1310-2818    

DOI:10.1080/13102818.1995.10818840

出版商:Taylor & Francis    

年代:1995

数据来源: Taylor

摘要:

The crude xylanase preparation (P-1) for biotechnological applications was obtained from the culture supernatant of Aspergillus niger A3by precipitation with ethanol. The pH optimum (5.0) and temperature optimum (40 °C) were estimated. This crude xylanase preparation was stable at pH 5.0 (80 % retained initial activity for 24 h) and temperature between 20 - 45 °C (75 % retained initial activity for over 24 h). At the optimal experimental conditions for enzyme hydrolysis (2.5 % substrate concentration, 0.1 % concentration of the crude xylanase preparation, 50 °C—temperature of hydrolysis, pH 5.0 and 72 h time of hydrolysis) the xylans of two substrates (xylan ex larch sawdust and pretreated com stalks with 1 % NaOH) were hydrolyzed to 55 and 65%, respectively. Six forms of xylanases were detected by molecular-sieve column chromatography of the P-1. The maximal active xylanase peaks (Fr-II and Fr-IV) were purified further by anion-exchange column chromatography. The two xylanase preparations P-2 (Fr-II-III) and P-3 (Fr-IV-II) were obtained. The pH optimums (4.0 for P-2 and 4.5 for P-3) and temperature optimums (60°C for P-2 and 40° C for P-3) were estimated.

ISSN:1310-2818    

DOI:10.1080/13102818.1995.10818841

出版商:Taylor & Francis    

年代:1995

数据来源: Taylor

ISSN:1310-2818    

DOI:10.1080/13102818.1995.10818851

出版商:Taylor & Francis    

年代:1995

数据来源: Taylor

摘要:

The resorts for the protein storage on global scale have been regarded. After analysis of the trophic chain by different organisms and by men, its shortening as a way for solution of the protein problem has been motivated. In this conection a variety of assortiments of plant protein products have been discussed. The world production and the marketing of plant protein products for food mark an increase. Here the role of Society for Green Vegetation Research (SGVR) has been emphasized.

ISSN:1310-2818    

DOI:10.1080/13102818.1995.10818842

出版商:Taylor & Francis    

年代:1995

数据来源: Taylor

ISSN:1310-2818    

DOI:10.1080/13102818.1995.10818852

出版商:Taylor & Francis    

年代:1995

数据来源: Taylor

摘要:

Disadvantages of Michaelis-Menten type kinetics are discussed. On this basis the necessity of a quantitative analysis of the kinetic equations sensitivity is justified as the aim of the present study. The Monte Carlo method is chosen for observation of the sensitivity of two of the most typical Michaelis-Menten type kinetic equations selected as examples. It is shown that more than 40% changes in the kinetic constants determination do not exert any influence in the final calculations obtained from the equations investigated. The results of this work show that the methodology developed can be applied to sensitivity analysis of other concrete forms of the Michaelis-Menten kinetics equations.

ISSN:1310-2818    

DOI:10.1080/13102818.1995.10818843

出版商:Taylor & Francis    

年代:1995

数据来源: Taylor

ISSN:1310-2818    

DOI:10.1080/13102818.1995.10818853

出版商:Taylor & Francis    

年代:1995

数据来源: Taylor

ISSN:1310-2818    

DOI:10.1080/13102818.1995.10818854

出版商:Taylor & Francis    

年代:1995

数据来源: Taylor