查询词典 phosphorus

According to variation of slag oxidizability and basicity with time, the routes of slag formation during smelting medium and low phosphorus liquid iron were discussed in detail.

为此从炉渣碱度和炉渣氧化性两个方面讨论了复吹转炉冶炼低磷铁水和磷含量较高的铁水的成渣路线。

There are a lot of phosphorus/uranium deposits in marginal basins along Yangtze platform , hosted in Early Cambrian strata and controlled by some specified paleogeographic and paleostructural positions.

大量磷铀矿床产于扬子地台边缘海盆，含矿岩系为下寒武统，矿床产出在适宜的岩相古地理与古构造部位，分东西两个成矿带。

A greenhouse study was conducted to learn the effect of introduced or indigenous mycorrhizae species on the growth and phosphorus uptake of Pennisetum flaccidum ,which was a sand fixation plant on the grassland of the Tibetan plateau.

采用盆栽方法，就外源菌种、土著菌种对固沙植物白草( Pennisetum.flaccidum )生长和吸磷效率的影响进行了研究。

Azobis-4-cyanopentanoyl chloride was prepared by reaction of 4,4'-azobis-4-cyanopentanoic acid and phosphorus pentachloride.

采用4，4'-偶氮二（4-氰基戊酸）与五氯化磷反应制备了4，4'-偶氮二（4-氰基戊酰氯）。

During the process of imidacloprid preparation, using phosphorus pentachloride dehydration and greatly excess 2-nitroiminoimidazolidine, the yield may reach 90%, and the purity is over 95%, so this a fairly good synthesis method.

吡虫啉合成中用五氧化二磷脱水法和过量2-硝基亚氨基咪唑烷法收率接近90%，纯度达95%以上，是较佳的合成方法。

F Some raw materials may not be acceptance tested by the firm because of the hazards involved; e.g., phosphorus pentachloride, sodium azide, etc.

一些原料并不可以接受检测，由于涉及污染；如五氯化磷，叠氮化钠，等。

Cycloserine was produced using L-serine methyl ester hydrochloride as raw material. L-serine methyl ester hydrochloride was chloridized with phosphorus pentachloride to afford 2-amino-3-chloride propanic acid methyl ester hydrochloride, which was cyclized with hydroxylamine in the presence of alkali to give cycloserine.

以L-丝氨酸甲酯盐酸盐为原料制备了环丝氨酸。L-丝氨酸甲酯盐酸盐和五氯化磷在氯仿溶剂中进行氯代反应生成2-氨基-3-氯丙氨酸甲酯盐酸盐，后者和羟胺在碱性溶液中发生环合反应得到环丝氨酸。

In order to check the corresponding compound at 31P NMR –45.4 ppm, stable pentacoordinate spirobicyclic 2-phenoxy-1,3-phenylene-dioxo-1,3,2-iminoacetoxyphosphoranes were synthesized through a new and efficient method whereby phosphorus pentachloride was displaced stepwise by catechol, N,O-bisamino acid and phenol, or catechol, phenol and N,O-bisamino acid, their 31P NMR chemical shifts are at about 31P NMR –45.0 ppm, the results showed that the compound 4 at 31P NMR –45.4 ppm was pentacoordinate phosphorane containing amino acid residue.

采用磷谱跟踪来研究上述成肽反应机理。例如在氮气保护下，0.1mmol O，O-亚苯基磷酰氯（1）和0.15mmol N，O-二苯丙氨酸（2）苯溶液加入0.6ml核磁管中，混合均匀，反应过程用磷谱检测。反应1分钟后，起始原料1(δp=19ppm)很快转变成N-磷酰苯丙氨酸的三甲基硅基酯（3）(δp=19.8ppm)，在8分钟内，3完全转变成苯丙氨酸磷烷4(δp =-45.4ppm)，同时出现环磷三酯（6）(δp=3.5ppm)。随着反应的进行，对应于化合物4的峰逐渐变小，而6逐渐变大。

In addition, the coordination number of coordination complex formed by phosphorus pentafluoride and aether was calculated and the number decreases from 2.04 to 0.8436 when temperature rises from 0℃ to 30℃; the equation of dissolving rate was also acquired: Y = Bi+2 BiX.

此外还计算了五氟化磷与乙醚形成缔合物的配位数，当T从0℃～30℃时，其值为2.04～0.8436；从试验中得出了不同温度下的溶解速率方程：Y′=B_1+2 B_2X。

In this review the structure characteristic,bonding and spectral properties,synthetic methods and chemical reactivity of tricoordinated pentavalent phosphorus Compound with the structure are described.

对具有R－P结构的三配位五价磷化合物的结构特点、成键及光谱性质、合成方法及化学反应性能作了一描述。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。