内电解法处理依诺沙星制药废水

研究内电解法对依诺沙星制药废水的处理，并以COD去除率及紫外去除率为指标考察其处理效果。实验中通过改变碳的种类、铁碳比、停留时间、废水的pH值等参数，寻求处理该废水的最佳条件，结果表明：当进水COD在4000～5000mg／L，铁碳比(v／v)为1：1、停留时间30分钟时，铁碳内电解COD的去除率可达60％，紫外去除率可达90％。     

Rhizobium fredii USDA257对中国栽培大豆结瘤阻断作用的敏感性

本实验通过根瘤菌２６６,１３８和２５７按不同比例混合,侵染大豆使之结瘤,并测定结瘤数量与平均瘤重,来推断哪种比例最适合结瘤．通过比较实验结果发现,ＲｈｉｚｏｂｉｕｍｆｒｅｄｉＵＳＤＡ２５７对快生型大豆根瘤菌２６６和慢生型大豆根瘤菌ＵＳＤＡ１３８在我国栽培大豆上结瘤阻断作用不明显,同时发现,以２６６：２５７＝１：１混合时,结瘤效果最好．     

On the origin of printing in the light of new archaeological discoveries

30 years have pas. since a printeddhārani sūtra scroll was discovered in 1966 in Kyongju. Korea. However. there have been different views about the date and place of its printing and publication in Korea and abroad. Some Korean scholars think that it was translated into Chinese from Sanskrit in 704 in China and printed during 706–751 in the Silla period in Korea. After a further research it is now proved that this sutra was translated into Chinese in 701 and printed in the following year, 702, in Luoyang, during the reign of Empress Wu. This shows that the sutra could not have been printed in the Silla period. The discoveries of theSnddharma pundarik sūtra printed during 690–699 and the Sanskritdharani charm printed around 650–670 in China also show that thedhārani sutra found in Korea is not the earliest one. Both literary records and archaeological findings prove that printing originated in China.