查询词典 reagent

At the endpoint of the titration a slight excess of the reagent increases the flow of current to between 50 and 150 microamperes for 30 seconds to 30 minutes, depending upon the solution being titrated.

在滴定到终点时，卡尔试剂的稍微过量，在30秒到30分钟内电流将增加至50~150微安培，取决于被滴定的溶液。

We used the culture of mycoplasma and reagent boxes to examine the mycoplasma in 1357 women s vaginas then the sensitivity tests to 6 kinds of antibiotic.

使用支原体培养及药敏试剂盒检测1357例女性生殖道的解脲支原体，并对6种抗生素的药敏试验进行分析。

acetyl chloride, a novel fluorescence derivatization reagent, has been developed for the determination of sterols and stanol .

采用荧光衍生化试剂2-(9-咔唑)乙酰氯，对天然产物谷甾醇、豆甾醇、菜油甾醇及谷甾烷醇的柱前衍生化条件，包括催化剂的种类、反应温度、衍生化时间等进行了考察，结果表明：催化剂选用三乙胺，反应温度80℃，时间20min，衍生产物具有恒定的最大检测响应值。

In this paper, sludge activated carbon was prepared from municipal wastewater treatment plant sludge using chemical activation (the activation reagent was ZnCl2), and the kinetics of adsorption of three dyes (Reactive Brilliant Red K-2BP, Acid Scarlet GR, Direct Violet N) by SAC was studied.

以城市污水处理厂脱水污泥作为原料，采用化学活化法（ZnCl2作为活化剂）制得污泥活性炭，全面研究了污泥活性炭对活性艳红K-2BP、酸性大红GR和直接紫N这3种染料的吸附动力学行为。

Methods Anhydrous acetic acid as solvent, 0.1 mol/L perchloric acid as titrant, crystal violet solution as indicator to establish non-aqueous titrations and ODS column as stationary phase, methanol and a mixture of 0.025 mol/L sodium phosphate monobasic and 0.02 mol/L sodium dedecyl sulfate (80:20) adjusted with phosphoric acid to a pH (4.8±0.1J as mobile phase, 220 nm as detective wavelength to establish HPLC-UV method for determination of piperazinylethylestrone drug substance; FMOC-CL as a derivatization reagent, FD as a detector to establish an HPLC method with derivatization and column switching for determination of piperazinylethylestrone in dog plasma.

分别采用无水冰醋酸为溶剂，0.1mol/L高氯酸为滴定液，结晶紫指示液指示终点的非水滴定法和HPLC-UV法测定哌嗪雌酚酮原料药含量；以FMOC-CL为衍生化试剂，采用柱切换柱前衍生化萤光检测的HPLC法测定狗血浆中哌嗪雌酚酮含量。

Ultrasonic cavitation; coking wastewater; phenol; Fenton reagent; activated-sludge process; catalyst; water quality model

超声空化；焦化废水；苯酚； Fenton试剂；活性污泥法；催化剂；水质模型

A sample (660 mg ) of an oligomeric protein of Mr 132,000 was treated with an excess of l-fluoro-2,4-dinitrobenzene (Sanger's reagent) under slightly alkaline conditions until the chemical reaction was complete.

一分子量为132，000的660mg寡聚蛋白样品，在弱硷性条件下用过量的1-氟-2，4-二硝基苯处理，直到反应完成。

Extent of etherbond cleavage becomes more and more intensive with higher alkaline concentration, higher reaction temperature, longer reaction time, stronger activity of nucleophilic reagent, and these substituted aryl ethers will become more and more unstable.

碱浓度越高，反应温度越高，反应时间越长，亲核试剂的活性越强，醚键断裂的程度越大，这类化合物就越不稳定。

The results showed that the addition of oxides and carbonates of some alkaline-earth metals in sulfur fixation reagent will enhance the decomposition temperature of CaSO4 by more than 50℃, which confirmed the effect of these additives on prohibition of CaSO4 decomposition.

结果表明，氧化物系列和碱土金属碳酸盐系列复合固硫添加剂均比CaO单独使用时使CaSO4推迟50℃多分解，对固硫产物CaSO4晶体在高温下的分解有明显的抑制作用。

The results confirm that NH3 slip increases with both higher ratio of NH3 to NO n(NH3/n and higher concentration of a reducing reagent, while it decreases with the increase of temperature. Initial NO concentration and its residence time can also affect the NH3 slip. A higher initial NO concentration lead to higher NH3 slip, but added residence time has the opposite effect. Among urea, ammonium carbonate and ammonia liquor, the NH3 slip of urea is the highest and that of ammonia liquor is the lowest.

试验结果表明：温度越高，漏失氨含量越低；随氨氮物质的量比的增加，NH3漏失含量不断增加；还原剂质量浓度越低，NH3漏失含量越低； NO初始浓度和停留时间对漏失氨浓度也有影响，NO初始浓度越高NH3漏失浓度越高，停留时间越长漏失氨浓度越低；不同还原剂NH3漏失浓度不同，尿素、碳酸氨、氨水3种还原剂中，尿素的NH3漏失浓度最高，氨水的NH3漏失浓度最低。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。