Hydroxysteroid dehydrogenase/carbonyl reductase ( 3α-HSD/CR,EC 1.1.1.50 ) from Comamonas testosteroni is an inducible enzyme which catalyzes the oxidation of androsterone with NAD+ to form androstanedione and NADH. 3α-HSD/CR was a member of the SDRs family, whose crystal structure had been solved by X-ray diffraction in 2000. The structure of 3α-HSD/CR is a homodimer which shows a typical pattern of Rossmann-fold structure consisting of βαβ units, and reaveals similarity with other members upon the SDRs family.

中文摘要 3α-Hydroxysteroid dehydrogenase/carbonyl reductase ( 3α-HSD/CR日本A级黄色网站，EC 1.1.1.50 )是從Comamonas testosteroni菌體中分離而來的誘發(fā)性酵素国产精品人人爽人人做，利用NAD+為輔因子，將受質(zhì)androsterone氧化成androstanedione并伴隨NADH的生成而完成催化反應(yīng)国产精品一区久久久久久。3α-HSD/CR是屬於SDRs家族成員之一一级不卡黄片，其立體結(jié)構(gòu)已經(jīng)在2000年利用X-ray晶體繞射所解出。3α-HSD/CR在結(jié)構(gòu)上為一同源雙聚體www网站啪啪啪性交黄，并和其它家族成員一樣具有βαβ二級(jí)結(jié)構(gòu)所疊合組成的Rossmann-fold特徵av全国最大的黄色网站。

The influence of solvent on the homogeneous hydrogenation of maleic anhydride is obvious.

溶劑對(duì)順酐加氫催化活性有著很大的影響。

In this article, Fe3-Al3 was first used to catalyze copolymerization of maleic anhydride and isoprene.

研究了雙金屬體系Fe3-Al3催化馬來酸酐與異戊二烯的共聚反應(yīng)www.韩日欧黄色片网站.com。

Anise oil is a natural spice in Guangxi. Isolation of trans-anethole degrading bacterial strains and trans-anethole biotransformation process were performed using anise oil as the only carbon source. The target strains were expected to produce high value-added nature spice and medicine intermediate by biotransformation of trans-anethole—the main constituent of anise oil. Bacteria were isolated from soil under aniseed trees by enrichment culture.

以廣西特色香料資源茴油為碳源国产亚洲AⅤ人片在线观看，開展了反式茴腦生物降解菌株的篩選工作，并對(duì)反式茴腦生物轉(zhuǎn)化過程進(jìn)行了初步研究国产精品熟女30p，以期獲得的菌株能催化茴油中的主要成分反式茴腦国产特黄AAA级在线播放，合成高附加值的天然香料或醫(yī)藥中間體。

Synthesis of p-Anisidine was studied by reducing p-Nitro Anisole with hydrazine hydrate in the presence of Pd/C catalyst.

研究以Pd/C催化劑催化水合肼還原對(duì)硝基苯甲醚合成對(duì)氨基苯甲醚的工藝免费看美女的隐私。

To study the performance of inorganic composite catalyst for the SPC oxidation of p-methyl anisole, Cu2-Co2-KBr is used as catalyst of sodium percarbonate oxidation for p-methyl anisole synthesized by paracresol methylating. Effect of reaction conditions, such as the factors of catalyst composition, catalyst quantity, solvent, reaction temperature and time on oxidation of p-methyl anisole, is investigated.

研究了無機(jī)復(fù)合催化劑催化SPC氧化對(duì)甲基苯甲醚的反應(yīng)性能：以Cu2-Co2-KBr為催化劑精品精品国产自在久久高清，利用過碳酸鈉氧化對(duì)甲酚甲基化產(chǎn)物對(duì)甲基苯甲醚，系統(tǒng)研究了催化劑組成比例高清影音先锋在线亚洲AV、催化劑用量国产乱子伦免费视、溶劑、反應(yīng)溫度日本高清aⅴ永久免费、反應(yīng)時(shí)間等因素對(duì)反應(yīng)的影響人人骚人人操人人看。

The activity of the co-catalysts consisting of H form zeolites ( HY, H-β and HZSM-5) and SnO in the reaction of anisole with acetyl chloride mainly depended upon the SiO2/Al2O3 molar ratio of the zeolite used.

由H型沸石(HY和H-ZSM-5沸石)和SnO組成的復(fù)合催化劑在苯甲醚與乙酰氯的酰化反應(yīng)中的催化活性主要取決于所用沸石的硅鋁比九九久久精品免费视频。

A one-pot synthesis of indoles by a palladium-catalyzed annulation of ortho haloanilines and aldehydes is reported by the group of Zhu J.

一個(gè)鍋合成吲哚的鈀催化圓環(huán)鄰haloanilines報(bào)道又又硬又粗又爽又黄又大的免费视频，由77醛朱 J查看。

The strategy toward the synthesis of spirotryprostatin B is focused on MgI2-catalyzed intramolecular annulation reaction of cyclopropanyl spiroox--indole and imine.

以天然產(chǎn)物的全合成為目標(biāo)国产在线乱网站，設(shè)計(jì)了MgI_2催化的螺氧吲哚化合物與亞胺分子內(nèi)環(huán)合反應(yīng)国产人人综合，構(gòu)建目標(biāo)分子骨架的策略。

L-prolinamide/PPTS system was developed to catalyze Robinson annulation of 1,3-cyclohexanedione derivatives. Using this system, the functionalized carbon chain of Wieland-Wiescher ketone could be synthesized in high enantioselectivity, which was a useful synthon for structural diversity of total synthesis of natural product.

二免费黄色网址。、發(fā)現(xiàn)了L-prolinamide／PPTS體系可以催化Ronbinson環(huán)化1青青免费在线视频，3-環(huán)己二酮衍生物免费一区二区三区毛片完整版，實(shí)現(xiàn)含季碳且具有多官能團(tuán)側(cè)鏈的Wieland-Wiescher酮高對(duì)映選擇性的合成，為天然產(chǎn)物結(jié)構(gòu)多樣性的合成奠定了基礎(chǔ)免费一看一级毛片久久。