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- Density Functional Theory, Cytosine, Tautomerism. 密度泛函理論;胞嘧啶;
- Keywords IR spectroscopy;keto enol tautomerism;reaction mechanism; 紅外光譜;互變異構;反應歷程;
- This complex reaction is characterized by a keto-enol tautomerism eqilibrium and ester exchange reaction. 此螯合反應是由酮一烯醇互變異構平衡過(guò)程和酯交換反應組成。
- Metal salts and Carboxy, keto, aldehyde, acetoacetoxy, complexes phosphonic acid, imine, amino and thio. 金屬鹽類(lèi)和羧基，酮，醛，乙酰乙酸，配合膦酸，亞胺，氨基酸和硫代。
- Cyclic carbonate, Amine aldehyde, keto, activated olefinic bond, N-alkoyl, acid, anydride, acid chloride, acetoacetoxy. 環(huán)碳酸酯，胺醛，酮，活性烯鍵的N alkoyl，酸，anydride，酰氯，乙酰乙酸。
- Keto-enol tautomerism is the most common tautomery phenomenon.Keto -enol themselves are the real chemical substance. 酮及烯醇互變是互變作用最普通的現象,它們都是真實(shí)的化學(xué)實(shí)體。
- "The keto form predominates in many aldehydes and ketones, the enol form in ph enol s. 在許多醛和酮中酮基都是最主要的組分。
- "Constitutional isomers that can be readily converted from one to another are called tautomers (see tautomerism). 彼此間很容易相互轉換的組成異構體稱(chēng)為互變異構體現象。
- Studies of the UV-VIS spectra of them in several acid solutions indicate the quinone-ammoni-um tautomerism. 在一定的酸性介質(zhì)中，這類(lèi)冠醚存在著(zhù)銨琨互變異構，測定了它們在不同介質(zhì)中的紫外-可見(jiàn)光譜，并對最大吸收峰進(jìn)行歸屬。
- The paper introduces implication of grignard reagent and application in organic synthesis ,such as,synthesis of alcohol,aldehyde,keto,acid and alkane,etc. 本文介紹了格利雅試劑的含意,格利雅試劑在合成中的主要應用(如:合成醇、醛、酮、酸、烴等)。
- Immunoradioassay was used for the examination of brain cAMP, cGMP, TXB 2 and 6 keto PGF1a(metabolites of TXA 2 and PGI 2) contents. 各組到預定時(shí)間后 ,取腦組織勻漿 ,用放免進(jìn)行環(huán)磷酸腺苷 (cAMP)、環(huán)磷酸鳥(niǎo)苷(cGMP)與TXB2 及 6 酮 (TXA2 、PGI2 穩定代謝產(chǎn)物 )含量測定 ,并對腦組織勻漿進(jìn)行蛋白定量。
- Semiempirical MNDO ealculations were performed in order to study theformhydroxamic acid-formhydroximic acid tautomerism. 應用半經(jīng)驗MNDO方法研究了甲異羥肟酸與甲羥肟酸的互變異構平衡。
- The efectofaddition ofsom e m etalions and keto acids on L-m alic acid ferm entation by im m obilized Aspergillus flavus wasstudied. 研究了某些金屬離子和酮酸對固定化黃曲霉發(fā)酵L-蘋(píng)果酸的影響。
- The crosslinking reaction between keto group and hydrazine group was proved by FTIR and TEM (transimission electron microscope) technology. 用傅里葉紅外光譜和透射電鏡證實(shí)了酮羰基與肼基之間發(fā)生了交聯(lián)反應。
- Abstract The crosslinking reaction between the keto group and the hydrazine group was used to prepare the crosslinkable polyurethane/acrylic emulsion. 摘要 文中利用肼基與酮羰基之間的脫水縮和反應制備了丙烯酸樹(shù)脂交聯(lián)改性水性聚氨酯乳液。
- When the tautomer DTP(1,3,7) reacts with the electrophilic carcinogen BPDE,the atomic S10 of DTP(1,3,7) superiorly attacks the BPDE. 二硫酮DTP(1;3;7)在水相中與致癌物BPDE進(jìn)行親核取代反應時(shí);二硫酮DTP(1;3;7)中的S10原子優(yōu)先進(jìn)攻親電試劑BPDE.
- Instead, ESIPT takes place, forming a proton transfer tautomer, in which the central nitrogen atom acts as the secondary alkyl amine. 非光緩解途經(jīng)可分為物理性質(zhì)的由光能轉為熱能散失在系統中，或是化學(xué)性質(zhì)的由光能轉為化學(xué)能進(jìn)行化學(xué)反應；
- While the pressure of PEEP increased from 0 to 30 cmH 2O, TXB 2 increased by 41 0%, 6 Keto PGF 12 increased by 21 1% and the ratio of TXA 2/PGI 2 decreased. PEEP壓力從0增至30cmH2O，TXB2增加41.;0%25，6－keto－PGF12增加21
- Tautomerism: Existence of two or more chemical compounds that have the same chemical composition But different structures (isomers) and that convert easily from one to another. 互變異構體現象:兩種或多種化合物(同分異構體),具有相同的化學(xué)組成,但結構不同,很容易從一種轉換到另一種。
- Satal Keto and his cousin Aleema would go on to forge the Krath, a secret society of social elites in the Empress Teta system, who dabbled with the dark side and Sith magic. 薩朵．凱多和表親阿力瑪藉由黑暗面和西斯巫術(shù)，在黛塔女皇星系成立了秘密的卡瑞斯教派階級。
