查询词典 donor impurity

Secondly, the silver based catalysts modified by phosphorus, zirconium, zinc, potassium and so on using molecular sieve as carrier, which were produced by ion-exchange method, had also good catalytic performance for 1,2-propane glycol oxidation to methylglyoxal. The conversion of 1,2-propane glycol and the selectivity of methylglyoxal were both high, and the impurity such as formaldehyde and acetaldehyde in the product is little. At the condition of the temperature 300 ℃, the molar ratio of oxygen to 1,2-propane glycol 1.7:1, the space velocity 6000h~(-1), and the concentration of 1,2-propane glycol 70wt%, the conversion of 1,2-propane glycol is 90% and the selectivity of methylglyoxal is 45% on the Ag-P catalyst.

其次对采用离子交换法制备的负载在分子筛上的银系催化剂进行了研究，发现此催化剂在助催化剂磷、锆、锌、钾等的作用下对丙二醇的低温氧化脱氢具有很高的活性，可以得到较好的丙酮醛的收率，并且产物中的甲醛、乙醛副产物的量比较低；经过对Ag-P催化剂上反应条件的考察，发现当温度为300℃、氧醇比1.7：1、空速6000h~(-1)、丙二醇浓度为70wt%时，丙二醇的转化率为90%，丙酮醛的选择性为45%。

Shrinkage and floating in the formation of monlchamus prbroin nonanatomical divericolor, are like those little depression, often to a drop or a small piece of impurity-centric, form a circle around the linggong.

缩孔与浮色发花的不不差别是：不朱膜上酿成不法规的、有如球状的、小的凹下，必然以一滴或一小块杂质为洋心，边际酿成一个环形的凌。

The whole processing flow line, from detecting the size of corn, flexible cutting, screening and washing by flowing water, removing impurity by laser to vacuum loading, is manipulated by computer, which guarantees the product's unique quality. Palenque has long been ready sale in Japan, Germany, and French etc.

日本全电脑控制操作的加工流水线，从检测玉米的大小，柔性切割，流水筛洗，激光除杂质，真空罐装与德国高温高压杀菌设备，都保证了产品独一无二的品质，长期以来帕伦克即食玉米畅销于日本，德国，法国等发达国家。

Purity or impurity measurements on finished preparations present a challenge to Pharmacopeial standard setting.

成品制剂的纯度或杂质的测量对药典的标准品设置提出了挑战。

If they occur, the Pharmacopeial and NDA impurity limits and rationale should be reviewed; the limits should be revised when indicated to ensure similar or improved quality of the drug substance.

如果发生变化，应检查药典和NDA杂质限定和原理；为确保原料药的相似或改善质量时，应修改限度。

If impurity or degradation product standards are unavailable, specificity may be demonstrated by comparing the test results of samples containing impurities or degradation products to a second well-characterized procedure e.g.: pharmacopoeial method or other validated analytical procedure.

如果杂质或降解产物的标准品不能够得到，专属性可以通过比较含有杂质或降解物的样品的检测结果和另外的完好的分析方法，如，药典方法或其它验证的分析方法的结果来证实。

The test showed that the recovery yield of marked compound in desulfurized solution was 103.3%, it was indicated that impurity in the mixed system had smaller influence on determination, the method is more accurate in determination of picric acid in desulfurized solution.

经过对脱硫液进行加标回收试验表明，加标回收率为103.3%，说明混合体系中杂质对测定干扰小，该方法对测定脱硫液中苦味酸的浓度比较准确。

The process of three-step countercurrentleaching is presented, in the first leaching step Fe as leading impurity inthe matte is leached priorly, Co and Ni are enriched in the residue of thefirst step and then are leached in the second leaching step with a lowconcentration acid, the residue from the second step containing hardleaching Fe, Co and Ni are leached with a high concentration sulfuricacid in the third step, and Cu stays in the final resude, the leachate of thethird leaching step is diluted and divided into two parts as the leachantsto the first and second leaching step.

在此基础上，提出了三段逆流选择性浸出技术：即第一段用低酸优先浸出钴冰铜中杂质铁，将钴镍富集到第一段的浸出渣中，第二段再用低酸浸出渣中部分钴镍，第三段用高酸浸出第二段渣中难浸的钴镍铁，将铜留在最终的浸出渣中，第三段浸出液经稀释，分流，分别返回至第一段，第二段作低酸浸出介质。

After riddling and removing the impurities,we adoptpatent technology and scientfic method to dainty flesh,the fungus has no counterfeit,no impurity,no additive,and no preservative.With its small volume,it is easy to be used,transported and stored.

纯真、无假、无杂质、体积小、朵大、肉质细腻、柔嫩鲜美无任何添加剂和防腐剂，长期保存不霉变，泡发后恢复原状，无压痕，便于使用、携带、储存、运输，是馈赠亲朋、宾客的上乘礼品和高档绿色食品。

The components of impurity in sebacic acid from traditional process were analyzed by GC-MS.

采用气相色谱-质谱联用分析确定了传统工艺生产的癸二酸中的主要杂质。

This immediately brings us to the next part of this article: creating an output "replace function".

下面进入文章的第二部分：建立一个"缓存处理函数"。

He was elected as an International Ornithological Committee member in 2002 during the 24th IOC held in Beijing.

现为中国鸟类学会理事和WPA 专家组成员。2002年被推选为国际鸟类委员会委员。