Since actinorhizal endophyte was first successfully isolated in 1978, various strains of Frankia have been isolated from nodules of Comptonia, Alnus, Elaeagnus, Hippophae, Myrica, etc. by using different techniques. B...Since actinorhizal endophyte was first successfully isolated in 1978, various strains of Frankia have been isolated from nodules of Comptonia, Alnus, Elaeagnus, Hippophae, Myrica, etc. by using different techniques. But still many other attempts to isolate Fran-展开更多
Selenium is an element having an important effect on animal, plant and human body in environment. Large numbers of samples containing selenium have often to be analysed in environmental laboratories. Therefore, it is ...Selenium is an element having an important effect on animal, plant and human body in environment. Large numbers of samples containing selenium have often to be analysed in environmental laboratories. Therefore, it is in urgent need to realize automatization of the analytical methods. The hydride generation展开更多
The determination of cyanide in waste water is one of the important items in environmental analysis and monitoring. According to the standard ’analytical method promulgated by the Bureau of Environmental Protection o...The determination of cyanide in waste water is one of the important items in environmental analysis and monitoring. According to the standard ’analytical method promulgated by the Bureau of Environmental Protection of Chinese Ministry of City and Countryside Construction and Environmental Protection in 1983 (the isonicotinic acid-pyrazolone展开更多
According to the theory of nutrition kinetics, the population increment mainly depends on the amount of the nutrients that exist in the system and can be utilized by the population. Through investigation, the author d...According to the theory of nutrition kinetics, the population increment mainly depends on the amount of the nutrients that exist in the system and can be utilized by the population. Through investigation, the author derives a new single population model which can be reduced into two classical ecological models-Malthus and Logistic equations—in two extreme conditions, and it is more reasonable to use it to explain some natural phenomena than展开更多
Extracts with nitrogenase activity have been prepared from 20 different organism,since J. E. Carnahan et al. demonstrated nitrogeuase activity in the crude extract from Clostridium pasteurianum in 1960. The properties...Extracts with nitrogenase activity have been prepared from 20 different organism,since J. E. Carnahan et al. demonstrated nitrogeuase activity in the crude extract from Clostridium pasteurianum in 1960. The properties of nitrogenase from some sources have been examined in detail. However, no researches on extract from Frankia pure cultures have been reported.展开更多
文摘Since actinorhizal endophyte was first successfully isolated in 1978, various strains of Frankia have been isolated from nodules of Comptonia, Alnus, Elaeagnus, Hippophae, Myrica, etc. by using different techniques. But still many other attempts to isolate Fran-
文摘Selenium is an element having an important effect on animal, plant and human body in environment. Large numbers of samples containing selenium have often to be analysed in environmental laboratories. Therefore, it is in urgent need to realize automatization of the analytical methods. The hydride generation
文摘The determination of cyanide in waste water is one of the important items in environmental analysis and monitoring. According to the standard ’analytical method promulgated by the Bureau of Environmental Protection of Chinese Ministry of City and Countryside Construction and Environmental Protection in 1983 (the isonicotinic acid-pyrazolone
文摘According to the theory of nutrition kinetics, the population increment mainly depends on the amount of the nutrients that exist in the system and can be utilized by the population. Through investigation, the author derives a new single population model which can be reduced into two classical ecological models-Malthus and Logistic equations—in two extreme conditions, and it is more reasonable to use it to explain some natural phenomena than
文摘Extracts with nitrogenase activity have been prepared from 20 different organism,since J. E. Carnahan et al. demonstrated nitrogeuase activity in the crude extract from Clostridium pasteurianum in 1960. The properties of nitrogenase from some sources have been examined in detail. However, no researches on extract from Frankia pure cultures have been reported.
