Planets and stars often are occulted by other celestial bodies.行星和恒星经常被其他天体掩蔽.He's occulted with an aureole.他被人为地神化了.The noise occultation was significant, and the undertone was the easiest one to be occulted.噪音对信号的...
介绍了一种新的测定亚硝酸根的荧光探针分子 ——— 3- ( 4-氨基苯基 ) 中氮茚-1-羧酸甲酯 ( API ).A novel fluorescence probe, 3 - ( 4 - aminophenyl ) indolizine - 1 - carboxymethyle ( API ) has been developed for the determination of trace nitrite.介绍了一种新的测定亚硝酸...
Methyl 2, 6 - dichlorophenoxyacetate is prepared with 2, 6 - dichlorophenol , sodium methoxide and methyl chloroacetate as raw materials.以2, 6- 二氯苯酚 、 甲醇钠甲醇溶液和氯乙酸甲酯为原料,合成了2, 6-二氯苯氧乙酸甲酯.Dimethyl carbonate is synthesized d...