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- Racemization is found with optically active substrate substrates. 發(fā)現旋光基質(zhì)有外消旋作用。
- Conversion of an optically active substance to a racemic form. 外消旋轉化將光學(xué)活性物質(zhì)轉化為外消旋形式
- Secondly,the government should also be an active initiator and the faithful vindicator of the concept.For faithfully undertake the... 而政府要承擔起這種角色,則需更新觀(guān)念,改進(jìn)工作方式,進(jìn)而有力地推動(dòng)社會(huì )主義榮辱觀(guān)在全社會(huì )的落實(shí)。
- We optimize the signal gain of the optically active crystal and apply the results to a BSO and BTO crystal. 對旋光材料優(yōu)化增益;并把處理結果應用于BSO和BTO晶體.
- JING Yuan-shan is not only a famous entrepreneur and philanthropist in China modem history, but also is an active initiator and practice man for modem eduction. 摘要經(jīng)元善是中國近代著(zhù)名企業(yè)家、慈善活動(dòng)家，也是近代新式教育的積極倡導者和實(shí)踐者。
- Optically active cyanohydrins are important intermediates lor the synthesis of agricultural chemicals. 光學(xué)活性氰醇是合成大量醫藥、農藥產(chǎn)品的重要中間體。
- Showing no optical activity in polarized light. 無(wú)旋光的極化光下無(wú)光學(xué)反應的
- Recent progresses of the synthesis of optically active tert-leucine are reviewed in this paper. 本文綜述了近年來(lái)光學(xué)活性的叔亮氨酸的合成研究及最新進(jìn)展。
- POLARIMETER - 10 units-Fully automatic polarimeter for measuring the rotation of optically active samples. 沈陽(yáng)凱西貿易公司采購旋光儀;具體標準如下: .
- Chiral synthesis can be achieved by taking advantage of natural or synthetic optically active compounds. 在手性合成中利用了天然或合成的光學(xué)活性化合物。
- The formation of enantiopure optically active biomolecules is an important chapter in the history of evolution. 光學(xué)活性生物分子的形成是世界進(jìn)化歷史中一個(gè)重要過(guò)程。
- The optically active polymers obtained were soluble in DMF and DMSO under appropriate reaction condition. 產(chǎn)物可溶于DMF與DMSO中,具有旋光性。
- Adding a trace amount of active initiator into the inert initiator SF-Na, the rate of ring-opening polymerization of ethylene oxide was promoted. The promoting mechanism was discussed. 研究了利用微量更活潑的陰離子引發(fā)劑促進(jìn)具引發(fā)惰性的磺胺嘧啶鈉引發(fā)環(huán)氧乙烷開(kāi)環(huán)聚合的反應速度,作了系列比較,并討論了其影響速率的機制。
- Optically active 3,4-diazaphospholane ligands and their application in asymmetric hydroformylation and allylic alkylation reactions. 旋光活性3,4-二甲基磷酸配體及其在不對稱(chēng)羥基化和烯丙基烴化反應中的應用。
- Asymmetric transformation becomes a more and more important branch in the preparation of optically active chemical compounds. 不對稱(chēng)轉換是光學(xué)活性化合物制備中越來(lái)越重要的一個(gè)分支。
- A series of optically active sulfenimines carryins new caniphor based mer-capto chiral auxiliaries have been synthesized. 合成了四種含樟腦巰基手性助劑的光學(xué)活性的硫亞胺化合物。
- A mixture of equal parts of an optically active isomer and its enantiomer is termed racemic and has a net rotation of plane-polarized light of zero. 對映異構體，又稱(chēng)對掌異構物、光學(xué)異構物或鏡像異構物，不能與完全與彼此立體異構體鏡像完全重疊。
- Optically active ethyl(S)-3-hydroxybutyrate,a useful chiral synthon,was prepared by stereoselective reduction of ethyl acetoacetate of the bread yeast in organic solvent. 利用面包酵母在非水相中不對稱(chēng)還原乙酰乙酸乙酯,制備了光學(xué)活性的手性化合物S()-3-羥基丁酸乙酯。
- Kunta JR,Khan MA,Reddy IK.Effect of menthol on permeability of an optically active and racemic propranolol across guinea pig skin[J].J Pharm Sci,1997,86(12):1369. 許英愛(ài);王雅君;李砥暉;等.;滲透促進(jìn)劑增加復方骨質(zhì)增生貼劑透皮滲透的研究[J]
- Stereoselective oxidoreductions catalyzed by enzymes or whole cells have been widely used for preparation of optically active alcohols and other chiral compounds. 摘要以立體選擇性氧化還原酶或其全細胞催化的不對稱(chēng)氧化還原反應已經(jīng)成為轉化光學(xué)活性手性醇及其他手性化合物的有效手段。
