THE MECHANISM OF THE VIRUCIDAL ACTION OF ASCORBIC ACID

The theoretical yield of H(2)O(2) formed during the oxidation of a virucidal solution of ascorbic acid approximates the virucidal action of an equivalent amount of H(2)O(2). Both the action of ascorbic acid and H(2)O(2) are completely neutralized by catalase. The action of ascorbic acid against influence A virus may therefore be explained as being due to the H(2)O(2) formed during the Cu catalyzed oxidation of ascorbic acid. The observed in vitro virucidal activity of ascorbic acid obviously can not be utilized therapeutically because of the presence of catalase in body tissues.     

提高功率因数,增加电能效益

本文论述了提高功率因数的重要作用。通过提高用电设备的自然功率因数和人工补偿法，使功率因数明显增加，进而提高电能质量，降低远距离输电能量损耗、提高输电效率和发电设备容量的利用率。     

硒、硫对大豆生长和养分吸收的影响

报道了硒、硫浓度对大豆植株干物重,硒、硫、氮、磷含量影响的水培试验结果。研究结果表明,当营养中硫的浓度为60mgL~(-1)时,0.025mg SeL~(-1)的加入使大豆植株干物重达到最高;60mg SL~(-1)的加入对植株吸收硒有一定的促进作用;当营养液中硫的浓度为30 mgL~(-1)时,随着硒浓度的增加,植株中硫的含量显著降低,但对磷无影响,而当营养液中硫的浓度增加到60mgL~(-1)时,在低硒(0.025mgL~(-1))浓度下,显著地提高了植株中硫和磷的含量,硫与磷的吸收呈极显著的正相关,r=0.61~(**)。本试验的硒、硫浓度对植株吸收氮的影响不显著。