Objective: To investigate and analyze the results of the determination of sperm concentration,fructose concentration,α-glucosidase and acid phosphatase(ACP) activities in the seminal plasma from different hospitals in the city of Nanjing,so as to provide a basis for the external quality control(EQC) of semen analysis within Jiangsu Province or even the whole country.

This article studied the influences on the stability of the phycocyanin in Spirulina platensis from the outer factors, such as the alcohol concentration, the temperature and pH.

Under these conditions,the fermentation products contained the highest alcohol concentration and the lowest residual sugar content.

The influence of the velocity of the decomposed hydrogen gas on the abnormal flameout of the hydrogen peroxide-low concentration ethanol gas generator was analyzed by experiment and simulation.

Relation between ion concentration and pH in precipitation in number of Chinese cities;

Effects of ion concentrations of buffer on hybridization efficiency with new style PNA-LSAW gene sensor;

The results indicate that supersaturation degree depending on ion concentration is very important for controlling the shape and size of MnCO3.