Nevertheless, Smoking could interact with wild type of NAT2 and increase the relative risk of rectal adenoma recurrence significantly. It is suggested that NAT2 might involve the metabolism of pre-carcinogen generating from tobacco and alter the susceptibility of cancer. Meanwhile, the NAT2〓4 alleles encode rapid acetylator of NAT2 would increase the risk of adenoma recurrence among those high-risk people with habit of fried fish intake.

吃紅燒魚因素在NAT2的快速酶中色哟哟夜夜操，特別是在野生純合型中直腸腺瘤復(fù)發(fā)的相對危險度有增高趨勢玖玖玖re96在线视频，提示了NAT2〓4等位基因編碼快酶型NAT黄色在线三区，可能在紅燒魚產(chǎn)生的雜環(huán)胺類化合物中代謝中加速其N-乙酰基化代謝過程亚洲香蕉视频综合在线，從而加速其代謝為終致癌物而與腸粘膜上皮細胞的DNA產(chǎn)生加成物国产精品女人被喂j8，損傷其遺傳物質(zhì)。

The yield was 84%. With OP-10, NPE as the the catalyzer for the diazo reaction, the use of hydrolyzed propenenitrile instead of propenoic acid, and OP-10 as the catalyzers of the aminate reaction, these experiments showed the feasibility of industralization, due to the much reduced costs, shortened reaction time and a higher yield.

采用壬基酚聚氧乙烯醚（OP-10）人人操人人干人人揉日日揉日日操、萘磺酸甲醛縮合物作重氮化反應(yīng)催化劑久久精品国产亚AV香蕉，丙烯腈加成、水解替代丙烯酸浓毛欧美老妇乱人伦视频在线，OP-10做氨化反應(yīng)催化劑国外女网址www女，通過四因子三水平正交試驗法實驗，得到較佳反應(yīng)參數(shù)高清无码一级黄色视频，反應(yīng)時間、收率91超碰日韩精品国产、成本都大大降低六大免费黄色网站，適宜工業(yè)化生產(chǎn)。

More than 75%of dodecene,decene,allylplenylether,phenylpropene(1.9×10－3mol) were completely hydrosilylated with 23.2 mg complex containing 4.9×10－6 mol platinum within 0.75 hour.

使用23.2 mg絡(luò)合物(含4.9×10－6 mol Pt)為催化劑黄片操女的观看、分別使用1.9×10－3 mol 1－十二烯鸥美免费黄片观看、癸烯、烯丙基苯基醚18av黄色、苯丙烯進行硅氫加成反應(yīng)日本一区二区欧美亚洲国产，在0.75 h內(nèi)產(chǎn)率超過75%。

The poisoning effects of alkyl sulfur compounds on the reactivity of isoprene hydrogenation over supported Pd catalyst are more and more serious with the decrease of the molecular mass of alkyl thiols and dialkyl disulfides.

乙硫醇和二甲基二硫醚使Pd／樹脂催化劑中毒的機理是黄色网站传送门，它們分別在催化劑上發(fā)生SH和S-S鍵斷裂99爱免费视频最新版本，并與Pd形成帶烷基基團的S-Pd吸附絡(luò)合物，致使催化劑上異戊二烯選擇加氫活性降低老熟妇仓乱视频一区二区。

The extraction equilibrium constants of Nd , Eu , Am in the system of seven monoacidic organophosphorus compounds dodecane 1. 0mol/l NO〓are reported. The dependency of the extractability on the PO〓function group黄片观看无码在线、bonding charactor、metallic ion species and the structure of substitute has been examined.

給出了七個烷基磷酸的正十二烷熔液從1.0mol／lNO〓水溶液中萃取Nd97人人摸人人干、Eu无码在线视频一区、Am的平衡分配常數(shù)Kex黄色片免费看、，考察了萃取劑PO〓官能團亚洲精品白色在线发布、萃合物成鍵特性、金屬離子及取代基結(jié)構(gòu)與萃取性能間的關(guān)系国产盗摄永久性观看，發(fā)現(xiàn)了：（1）可運用取代基自由能加和模型預(yù)測辛基膦酸辛基酯對La激情综合免费视频在线观看、Eu俄国精品一区二区在线观看、Nd、Am等三價離子的平衡分配數(shù)據(jù)制服丝袜中文字幕精品。

The process industrial synthsis of tert-dodecyl mercaptan from dodecylene and hydrogen sulfide with aluminium trichloride as catalyst was introduced, which consists of four units including the preparation of catalyst, purification of raw dodecylene, additive reaction and separation of reaction product.

介紹了以無水三氯化鋁絡(luò)合物為催化劑福利网站在线观看，十二烯和硫化氫直接加成法生產(chǎn)叔十二烷基硫醇的工業(yè)試驗工藝538在线视频免费播放。

Quinonyl compounds were reducted to phenolic compounds in high yields promoted by aluminum triiodide ,and after the reaction with dienophiles in Diels Alder reactions concave adductions were combined.

在現(xiàn)場制備的三碘化鋁促進下，醌類化合物發(fā)生還原反應(yīng)以良好產(chǎn)率生成酚類物欧美在线精品大片，并且在原位與親雙烯體發(fā)生Diels Alder反應(yīng)從而生成凹狀加合

Based on density functional theory with the generalized gradient approximation and a full-potential linearized augmented plane wave method, the calculation of the electronic structures and the magnetic properties on [Cuμ-1,3-N3](ClO4), where L is the tridentate Shiff base, has been performed.

基于廣義梯度近似密度泛函和全勢能線性綴加平面波方法久久精品一级无码，本文對聚銅絡(luò)合物[Cuμ1，3-N3](ClO4)（其中L=tridentate Schiff base為三齒席夫基）的態(tài)密度和磁矩進行了計算亚洲欧美女同一区二区。

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Then, it was condensed with-valine methyl ester to form a chiral imine, which was reacted with allyl zinc bromide in the presence of CeCl3·7H2O to afford the corresponding chiral homoallylic amine with high optical activity.

-N-Boc-3-苯基-2-氨基丙醛與-纈氨基酸甲酯縮合生成手性亞胺，在七水合三氯化鈰（CeC13·7H2O）催化以及底物的手性誘導作用下亚洲最大欧美日韩视频，該手性亞胺與烯丙基溴化鋅經(jīng)不對稱加成反應(yīng)合成了高光活性的單烯丙基化手性胺三级爆乳黄片在线看。