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- The application of ultrasonic radiation and polar aprotic solvent in the synthesis of dialkyl thiourea with NH_2C(=S)NH_2 and RBr was studied in this paper for the first time. 本文首次報道了超聲波輻射和極性非質(zhì)子溶劑在硫脲與溴代烷反應合成二烴基硫脲中的應用。
- In aprotic solvents magnesium effects pinacol reductive coupling of aldehydes and ketones. 在非質(zhì)子性溶劑，鎂對頻納醇與醛和酮的還原耦合反應也有一定效果。
- Keywords Cefuroxime Axetil;dipolar aprotic solvent;esterification reaction; 頭孢呋新酯;偶極非質(zhì)子性溶劑;酯化反應;
- The two systems of government are polar opposites. 這兩種政體正好相反。
- Keywords N-methylaniline;Diphenylamine;Aprotic solvent;IR spectrum;Crossassociation; 芳胺;極性非質(zhì)子溶劑;紅外光譜;交叉締合;
- Keywords Cefetamet Pivoxil;dipolartic aprotic solvent;esterification traction;Cefetamet; 頭孢他美酯;偶極非質(zhì)子性溶劑;酯化反應;頭孢他美;
- Most insect do not live in polar region. 大多數的昆蟲(chóng)不在極地地區生存。
- Keywords Aprotic solvent effect;Ketocoumarin dye;Spectrum;Fluorescence quantum yield; 非質(zhì)子傳遞溶劑效應;香豆素酮染料;光譜;熒光量子產(chǎn)率;
- Are there any animals in the polar circles? 南極圈和北極圈內有動(dòng)物存在嗎？
- Keywords 2;2';4'-trichloroacetophenone;1-（2;4-dichlorophenyl）-2-chloroethanol;sodium borohydride;reduction;metal chloride;aprotic solvent;cation amberlite; 三氯苯乙酮;1-（2;4-二氯苯基）-2-氯-乙醇;硼氫化鈉;還原;金屬氯化物;非質(zhì)子溶劑;陽(yáng)離子交換樹(shù)脂;
- They need the money to stay solvent. 他們需要這筆錢(qián)來(lái)保持償付能力。
- Located or found in one of the Polar Regions. 環(huán)極的，圍繞極地的位于或發(fā)現于一個(gè)極地區域中的
- In spite of vigilance a polar bear escape from the zoo. 盡管警戒很?chē)?，北極熊還是逃出了動(dòng)物園。
- aprotic solvent 疏質(zhì)子溶劑,非質(zhì)子溶劑
- The polar region is the habitat of the polar bear. 北極地帶為北極熊的棲息地。
- dipolar aprotic solvent 偶極非質(zhì)子溶劑
- Although they can swim, the polar bears are terrestrial animals. 北極熊雖然會(huì )游泳，但也是陸棲動(dòng)物。
- In spite of vigilance a polar bear escaped from the zoo. 盡管警戒很?chē)?，北極熊還是逃出了動(dòng)物園。
- The hypothetical universal solvent once sought by alchemists. 萬(wàn)能溶劑煉金術(shù)士曾一度尋求的假想的萬(wàn)能溶劑
- The polar bear's habitat is the icy waters of the Arctic. 北極熊的棲息地是冰冷的北極海域。
