boron

The boron deficiency plant appears inter-venial chlorosis, thickening, crisping leaves and increased leaf weight ratio (LWR).

缺使叶重比(LWR)提高和叶片脉间失绿、变厚、变脆。

Crystalline polypyrene microsheets were electrosynthesized in the medium of boron trifluoride diethyl etherate for the first time.

在三氟化乙醚介质,电聚芘首次制备出结晶型的聚芘微米片。

Reaction of ferrocenylphenylcarbinol with ethereal solution of boron trifluoride in dichloride methane formed the relevant ferrocenylphenylmethyl carbocation.

二茂铁基苯基甲醇与三氟化-乙醚溶液在二氯甲烷中作用,形成二茂铁苯基甲基碳正离子。

The carbothermic method of preparation for titanium diboride with titanium oxide and boron oxide in an arc furnace is studied.

研究了电弧炉碳热还原氧化钛和氧化制取二化钛的方法，制备出相对纯度大于95％的二化钛。

By fuming with sulfuric-phosphoric acid mixture the residual hydrofluoride was then expelled，and boron was finally determined by curcumin spectrophotometry after distillation.

同时，对所拟溶样条件下所得的分析结果是否问题进行了进一步探讨，结果证实，所拟溶样条件下的测定结果。

An investigation is also made on determining DMDAAC qualitatively by bromophenol blue test and quantitatively by tetraphenyl boron sodium precipitation reac...

用溴酚蓝对DMDAAC进行定性分析，用四苯酸钠及折光率法进行定量分析的方法进行了探讨。

Only small amounts of wurtzite boron nitride and lonsdaleite exist naturally or have been made in the lab so until now no one had realised their superior strength.

天然存在或者实验室制造的纤锌矿型氮化和朗斯代尔石数量很少，直到现在，也没有一个人发现它们令人吃惊的硬度。