boron

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

缺硼使叶(LWR)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.

在化硼乙醚介质,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.

二茂铁基苯基甲醇化硼-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硼制取二硼化钛的方法，制备出相对纯度大于95％的二硼化钛。

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硼的分析结果是否为全硼问题进行了进一步探讨，结果证实，所拟溶样条件下硼的测定结果为全硼。

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，用四苯硼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硼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。