查询词典 phosphorus

The feeding and excretion of three little fishes (Hemiculter. leucisculus, Tilapia. aurea and Cirrhinus. molitorelld) was studied and their effect on water quality of Qiankeng reservoir in Shenzhen City Around the topdown effect of fish was also studied. Based on the analysis of their stomach contents, their diet composition was assayed. The three fishes" feeding rhythm in cage and their rate of digestion indoor were looked into, and their daily ration was estimated through the method of daily average fullness index. Using the spectrophotometer, the content of chlorophyll a in the stomach was measured, and the feasibility of taking the chlorophyll a as an index of measuring the feeding of fish on phytoplankton was studied. Adopting the national standard method, the effect of the three fishes" excretion on total nitrogen, total phosphorus, CODMn, pH, turbidity and conductivity coefficient was surveyed. The effect of feeding and excretion offish on water quality was discussed and the results revealed as follows:H.

围绕鱼类的下行效应，本文以深圳茜坑水库三种小型鱼类Hemiculter leucisculus罗非鱼Tilapia.aurea和鲮鱼Cirrhmus.molitorella为研究对象，以胃含物分析为基础，分析了三种鱼类的食物组成；调查了网箱中自然状态下三种鱼的摄食节律，在室内调查了三种鱼的食物消化速率，运用日平均饱满指数法计算出三种鱼的日粮；采用分光光度法测定了鱼体肠叶绿素含量，探讨了叶绿素作为鱼类对浮游植物摄食量衡量指标的可行性；采用国家标准的水质测量方法，测定了鱼类排泄对总氮、总磷、高锰酸盐指数、pH、浊度和电导率的影响量。

Using soil opsonin can reverse the two courses, to improve the phosphorus validity.

施用土壤调理剂可以逆转这两个过程，从而提高土壤中磷素的有效性(22)(25)。

So rational using soil opsonin such as weathering coal furfural residue in calcareous soil, can improve the phosphorus validity and the utilization ratio in soil.

因此，在石灰性土壤中合理地施用风化煤、糠醛渣等土壤调理剂，可以增加土壤中的磷的有效性和提高磷肥的利用率。

Ackerson R C Osmoregulation in cotton in response to water III effects of phosphorus fertility PLANT PHYSIOLOGY , 1985,null

陈国良%穆兴民%贾恒义%徐学选水肥对沙打旺产草量协同效应的初步研究土壤侵蚀与水土保持学报， 1992，3

Separation and purification of microorganism, advanced wastewater treatment technology, RO technology (especially for various anti-pollution and low-press reverse osmose membrane), as well as other new physical and chemical sewage treatment technology, phosphorus and nitrogen desorbed from living waste technology, new type of electrochemistry sewage treatment technology and special electrode development.

污水生化处理高效微生物分离提纯，污水深度处理技术，膜过滤技术（特别是各种高通量抗污染低压反渗透膜），以及其它新的污染物高去除率污水物理化学处理技术，生活污水磷、氮高效脱除技术，新型电化学污水处理技术与特殊电极研发。

The watershed's worst problem is nutrient pollution, which is caused by the overabundance of the nutrients, nitrogen and phosphorus.

分水岭面临更严重的问题，来自营养物的污染，这些营养物污染源自营养物质、和磷的过量排放。

The anhydride groups and acid chloride groups are preferably derived from carboxylic acid groups or oxyacid groups of sulphur and phosphorus.

该酸酐团体和酰氯团体最好来自羧酸群体或含氧酸硫和磷集团。

The difference of ammonia, amido, amino group and quaternary ammonium salt, some common wrong expressions on them, and the valence state of phosphorus in some of its oxyacid were pointed out.

指出了氨、氨基、胺基及季铵盐的区别及其常见错误表述，以及磷的几种含氧酸中磷的价态，并着重指出没有"次亚磷酸"的叫法。

This method shows high sensitivity, good selectivity and low interference. It is a good method to determine phosphorus oxychloride in air of workplace.

本方法灵敏度高、选择性好、干扰少，是检测工作场所空气中三氯氧磷的好方法。

The most proper condition of synthesizing trihexyl phosphate ester with the method of phosphorus oxychloride has been discussed in this paper.

本文通过大量实验探讨了三氯氧磷法合成磷酸三己酯的最佳条件，使产率达到88.4%，正己醇的回收率达到80.0%。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新