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The three parameters in the culture of 1 000 mL flask were 27%,30%,and 27% lower than that of 250 mL flask,respectively.The concentrates of phosphate,nitrate and ammonium in progressive scale-up flasks decreased similarly.

在逐级放大的摇瓶中,氮、、铵浓度都随着培养时间延长而逐渐降低,尽管在1L的摇瓶中消耗得最慢,但三种摇瓶中在细胞生长对数期基本都被消耗尽了。

In chapter 2,the bi-electrophilicity ofα-CAPAs(Gly-CAPA,Ala-CAPA) was identified by the isotope analysis ~(18O,~(15)N and furtherproved by trappingα-CAPA with nucleophiles such as water,amino acids,phosphateand methanol in alkaline media which yielded phosphorylated products,namely,theNPAAs and N-(mono-substituted)phosphoryl amino acids.

同时,CAPA和亲核试剂如水,氨基酸,酸和甲醇分子反应可以生成各种酰化产物,如NPAAs和N-上单取代的酰化氨基酸。

To study the influences of diets with different calcium and phosphorus levels and with added phytase on the fattening results of egg-type cockerels,600 one day egg-type cockerels were divided into three groups and fed with diet in which higher level of Ca and P were designed according to the National Feed Standard of Broilers,low Ca-P level diet which contained 50%CaHPO4 of the control group and diet which was added with 0.2 g.kg-1 phytase on the basic diet of group Ⅰ respectively.

600只1日龄商品代蛋公雏被均等分为3组,分别给以按国标肉仔鸡饲养标准设计的高钙日粮,将CK组酸氢钙减少50%设计的低钙水平日粮及在试Ⅰ组基础上按每kg日粮添加0.2 g植酸酶,探讨不同钙水平及添加植酸酶对育肥蛋公雏饲养效果的影响。

And at the P concentration of 400 mg P/L and 800 mg P/L, the amount desorbed of garden soil is significantly higher than that of soil in farmland and orchard soil.

梯度在200mgP/L以内时,三种土壤对的解析量差别不大,随着平衡溶液浓度的增大,在400、800mgP/L下,菜园土解析的量要明显大于农田土和果园土。

P adsorbed by ferrihydrate was much more difficult to be desorbed than those by goethite and hematite.The large active surfaces of ferrihydrate contribute little on P desorption.

水铁矿吸附的比针铁矿和赤铁矿所吸附的更难解吸;水铁矿的大量活性表面并没有表现出增加释放的作用。

Objective A multiresidue method based on solid-phase extraction andgas chromatography with electron capture detector was developed for thesimultaneous determination of 15 pesticides (Dichlorvos, Dimethoate,Parathion-methyl, Malathion, Parathion, Fenpropathrin, Lambda-cyhalothrin,Cypermethrin,Esfenvalerate,Deltamethfin,Quintozene,Dieldrin,Heptachlor,α-Endosulfan,β-Endosulfan) in drinking water.

目的:建立同时检测饮用水中15种农药残留的固相萃取-气相色谱分析方法,所检测的农药包括5种有机:敌敌畏,乐果,甲基对硫,马拉硫,对硫;5种有机氯:五氯硝基苯,狄氏剂,环氧七氯,α-硫丹,β-硫丹;5种拟除虫菊酯:甲氰菊酯,三氟氯氰菊酯,氯氰菊酯,氰戊菊酯,溴氰菊酯。

This experiment is field test of the typical gray desert cotton soil in Xinjiang, through using different quantity of humic acids in the foundation of the convention applying fertilizer. The investigation on the transformation of the soil available phosphorus and the inorganic phosphorus content with different cotton growth period in different depths and different distances from the cotton plant, the dynamic transformation of various shapes inorganic phosphorus as well as the influence of humic acids on the cotton yield was conducted.

试验为新疆典型灰漠土棉田田间试验,通过常规施肥基础上施用不同量腐植酸,研究棉花不同生育期距地表不同深度及距棉株不同距离土壤有效及无机含量变化、各形态无机间动态转化以及施用腐植酸对棉花产量的影响。

The results have shown that for fodders containing different protein levels, the excretion of nitrogen and phosphor was the lowest (34.05%) when the crude protein reached 30%,and the excretion increased gradually otherwise;and for fodders containing different protein qualities,the excretion of nitrogen was the highest,fed with fish meal.

因此测定鱼类氮、排泄对研究养殖鱼类对氮、的日粮需要和养殖水域环境污染具有重要意义。许多学者从事了这一研究。草鱼作为我国重要经济养殖鱼类,有着较大的养殖面积。草鱼氮、排泄情况的研究在国内还未见报道,在国外,C.G。

The results have shown that for fodders containing different protein levels, the excretion of nitrogen and phosphor was the lowest (34.05%) when the crude protein reached 30%,and the excretion increased gradually otherwise;and for fodders containing different protein qualities,the excretion of nitrogen was the highest,fed with fis...

当粗蛋白水平为30%时,氮、排泄率最低(34.05%),粗蛋白高于或低于此值时,氮、排泄率呈增加趋势;对不同蛋白质量组:鱼粉组氮排泄率最高,而排泄率在各组无显著差异。

A two-year field experiment was conducted to investigate ammonia volatilization from Gleyed paddy soil in the Taihu Lake region. The experiment was designed to have four N levels 0, 180, 255, 330 kg hm^(-2 and four P205 levels 0, 30, 90, 180 kg hm^(-2, forming six NP combinations (CK-N0P0, LN-N180P90, OPT-N255P90, LP-N255P30, HP-N255P180 and HN-N330P90). Ammonia volatilization was measured with the enclosure method.

在太湖地区乌栅土上,采用田间小区试验连续两年研究了施氮量为0、180、255、330 kg hm^(-2),施(P2O5)量为0、30、90、180 kg hm^(-2)的6个组合(对照N0P0低氮N180P90、优化N255P90、低从N255P90、高N255P90、高氮N330P90)以及三个施肥时期对稻田氨挥发损失的影响,氨挥发采用密闭室间歇通气法测定。

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