COD

After determination, the COD cr detersive efficiency of effluent reaches 85% and the BOD 5 is 445mg/L.

利用无机粘土系聚沉剂处理造纸废水 ,并结合曝气等做进一步的深化处理 ,收到较好的处理效果 ,经测定出水的化学耗氧量 ( CODcr)去除率可达到 85%以上 ,五日生物需氧量( BOD5)为 445mg/L,该法处理造纸废水 ,操作简单 ,费用低 ,且处理效果

Investigation on the Variety of Biology in Luyun Ecological Garden of Dongguan;

东莞市“绿韵”生态园区生物物种变化情况调查

Enhancement of quality-based education of students in specialized English teaching of biology;

论生物专业英语教学中加强学生的素质教育

The Physical-chemical Properties of Magnetized Water and Its Application on Biology;

磁处理水的理化特性及其在生物方面的应用

Suppose of Anagenesis s Avenue of Dioecism Creature;

雌雄异体生物进化途径猜想

The article introduces the fitness and evolution of creatures and the harm from pollution background.

主要就污染物对动物、植物及人体健康的危害,以及在污染条件下生物的适应与进化作一综述。

This paper described the concept,variety and mechanism of environmental hormone,summarized the effects and harms on human and other creatures,and put forward the measures and methods of prevention.

文中叙述了环境激素的概念、种类和作用机理,归纳了环境激素对人类及其它生物的影响和危害及其预防对策。