The invention relates to a method for the extraction of keratin from dead animal skins, characterised in the treatment of dead animal skins with a substance of general formula, or at least one corresponding alkali metal, earth alkali metal, ammonium, or phosphonium salt, the variables having the following definitions: R, R = together or independently, H, C6-C14 aryl, C1-C12 alkyl, unsubstituted or substituted with one or several SH or OH groups, R, R = together or independently, H, C6-C14 aryl, C1-C12 alkyl, unsubstituted or substituted with one or several SH or OH groups, whereby at least one of R or R is not H, or R and R are not H and two vicinal groups of R to R together may be C3-C10 alkylene, R = H, C1-C12 alkyl, H-C=O or C1-C4-Alkyl-C=O, X, X, X and X = OH, SH or NHR, whereby where Rto R contains at least one sulphur atom, at least one of X to X = SH and where R to R contains no sulphur atom, at least two of X to X= SH.

本發(fā)明涉及一種從死亡動(dòng)物原皮中除去角質(zhì)的方法，其特征在于用通式I的物質(zhì)或至少一種對(duì)應(yīng)的堿金屬鹽欧美激情黄色a片网、堿土金屬鹽国内偷拍人妻、銨鹽或∴鹽處理死亡動(dòng)物原皮一级伦奷视频97人人模，式I中各變量定義如下：R 1 和R 4 相同或不同且選自氫A级毛片无码免费真人久久久、C 6 -C 14 芳基和C 1 -C 12 烷基视频在线看一区二区，其未被取代或被一個(gè)或多個(gè)SH或OH基團(tuán)取代；R 2 和R 3 相同或不同且選自氫亚洲日韩另类一区欧美、C 6 -C 14 芳基和C 1 -C 12 烷基，其未被取代或被一個(gè)或多個(gè)SH或OH基團(tuán)取代人人操人人莫人人vA，其中至少一個(gè)基團(tuán)R 2 或R 3 不為氫91黄在线，或R 1 和R 4 不為氫欧美快一级，且兩個(gè)相鄰基團(tuán)R 1 -R 4 可以一起為C 3 -C 10 亞烷基；R 5 選自氫九操在线亚洲、C 1 -C 12 烷基中文字幕黄色福利视频、H-C＝O或C 1 -C 4 烷基-C＝O；X 1 自慰一区二区、X 2 国产图片大全综合视频、X 3 和X 4 選自O(shè)H、SH和NHR 5 欧美熟妇性爱A片在线A片视频，其中若R 1 -R 4 含有至少一個(gè)硫原子308AV.COM，則至少一個(gè)基團(tuán)X 1 -X 4 為SH，以及若R 1 -R 4 不含硫原子91三级片视频第一页，則至少兩個(gè)基團(tuán)X 1 -X 4 為SH成人黄色在线播放。

Have had the intense function fromthis the explanation preparation and DNA, matched the body the planearyl residue groups and bases to insert the DNA double spiral plane,caused the plane aryl residue groups and bases the electronic clouddensity to have the change.

由此說(shuō)明配合物和DNA發(fā)生了強(qiáng)烈作用，配體的平面芳基基團(tuán)插入了DNA的雙螺旋平面欧美一级片一区免费，導(dǎo)致平面芳基基團(tuán)的電子云密度發(fā)生改變九九视频这里都是精品免费线看线看。

In addition, ioding was found to be an efficient catalyst for the imino Diels-Alder reaction of N-arylimine and enol ethers and the reaction provided tertrahydroqinolines in good yields. One pot synthesis of tetrahydroqinolines from aldehyde, aniline and enol ethers was also achieved using iodine as the catalyst. The chemical yield of the"one pot"reaction was comparable with that obtained using preformed N-arylimine.

此外我們也發(fā)現(xiàn)碘能夠有效地催化N-芳基亞胺與烯醇醚的Diels-Alder反應(yīng)，以很高的化學(xué)收率得到了四氫喹啉衍生物爽在线网站色网站啊啊啊，并且發(fā)現(xiàn)碘也能夠直接催化芳香醛一级做a爰片性色刺激、苯胺、烯醇醚的三組分"一鍋"反應(yīng)中国黄色片网站，獲得的化學(xué)產(chǎn)率與使用預(yù)制的N-芳基亞胺相當(dāng)色色色.com。

In comparison with literature method, the microwave approach shows the salient features of rapid reaction rates and significant energy saving, clean reaction conditions, enhancement in chemical yield, and nonuse of perchloric acid(70%), which will result in cost saving and minimize safety concerns in the organic laboratory.

考察了微波輻射功率和輻射時(shí)間對(duì)目標(biāo)產(chǎn)物收率的影響，291pao精品永远免费网站，4黄视频中文字幕，6-三芳基吡喃鹽與鹽酸羥胺反應(yīng)生成3，5-二芳基異噁唑衍生物的最佳微波輻射功率為600 W日韩无码超碰官网，輻射時(shí)間為8 min日本一区二区免费黄色视频，最大收率為83%。

For the α-arylation of ethyl acetoacetate, the product was α-aryl ethyl acetoacetates, rather than ethyl a-arylacetates which are the major products in other catalytic systems.

較為惰性的氯代芳烴在Pd2/L1的催化下国产在线精品免费一区，也能夠跟1成人蕾丝电影在线播放网站视频，3-二羰基化合物發(fā)生α-芳基化反應(yīng)。

In the presence of ethanol- HCl solution, arylamine-HCl and w=37% aqueous formaldehyde solution or the condensation product of arylamine and formaldehyde are directly reacted with ethyl 3-oxo-2-phenylmethylenebutyrate to form l-aryl-2-phenyl-3-carbethoxy-4-piperidone.

2－苯亞甲基－3－丁酮酸乙酯與芳香胺和w＝37％甲醛水溶液或芳胺和甲醛的縮合物在氯化氫－無(wú)水乙醇存在下可直接發(fā)生的Mannich反應(yīng)无码免费黄色网，得到1－對(duì)位取代芳基－2－苯基－3－羰乙氧基－哌啶－4－酮人人操,人人摸黄色。

In addition, ioding was found to be an efficient catalyst for the imino Diels-Alder reaction of N-arylimine and enol ethers and the reaction provided tertrahydroqinolines in good yields. One pot synthesis of tetrahydroqinolines from aldehyde, aniline and enol ethers was also achieved using iodine as the catalyst. The chemical yield of the"one pot"reaction was comparable with that obtained using preformed N-arylimine.

此外我們也發(fā)現(xiàn)碘能夠有效地催化N-芳基亞胺與烯醇醚的Diels-Alder反應(yīng)，以很高的化學(xué)收率得到了四氫喹啉衍生物igao激情，并且發(fā)現(xiàn)碘也能夠直接催化芳香醛乱性交小说视频、苯胺、烯醇醚的三組分&一鍋&反應(yīng)日本黄色视频在线观看免费，獲得的化學(xué)產(chǎn)率與使用預(yù)制的N-芳基亞胺相當(dāng)中年夫妇露脸视频。

The present doctoral dissertation was carried out to study the chemical constituents isolated from stems of two medicinal schisandraceous plants.34 compounds were isolated from the ethanol extracts of the stems S.henryi collected in the Jiangxi province by various column chromatographies.27 of them were identified on the basis of spectral analysis.There are 18 lignans,(including 5 dibenzocyclooctadienes,6 aryltetralins,2 tetrahydrofurans,3 diarylbutanes,2 other lignans),3 flavanols,2 glyceroesters,1 naphthoquinone,1 xanthine and 2 steroids,of which 6 compounds were new compounds,and 7 compounds were isolated from this family for the first time.

采用多種色譜技術(shù)進(jìn)行分離純化欧洲一级A片大全，從翼梗五味子藤莖的乙醇提取物中分離到34個(gè)化合物，綜合運(yùn)用現(xiàn)代波譜學(xué)技術(shù)鑒定了27個(gè)化合物国产迷系列视频在线观看应用，包括木脂素類化合物18個(gè)(其中聯(lián)苯環(huán)辛烯類木脂素5個(gè)一级黄片久久99，芳基四氫萘類木脂素6個(gè)，四氫呋喃類木脂素2個(gè)jjzzjjzz，二芳基丁烷類3個(gè)三级免费操逼视频，其他類型木脂素2個(gè))，黃烷醇類化合物3個(gè)92精品视频，甘油酯類化合物2個(gè)日韩人妻无码精品久久中文字幕，萘醌類化合物1個(gè)，黃嘌呤類化合物1個(gè)在线免费观看视频黄片，甾體類化合物2個(gè)131美女作爱视频一区二区，其中，5個(gè)為新化合物欧美一级αA，7個(gè)為本科首次報(bào)道伊人久久久AⅤ老熟妇。

Benzoyl chloride was treated with potassium selenocyanate in dichioromethane by using polyethylene glycal-400 as the solid-liquid phase transfer catalyst to yield the corresponding benzoyl isoselenocyanate. This intermediate did not need to be isolated and directly reacted with arylamines, affording the N-benzoyl-N'-arylselenoureas 2a~2p. These compounds were characterized by IR, 1H NMR spectra and elemental analysis and the single crystal structure of 2k has been confirmed by X-ray crystallographic analysis.

以PEG-400為固液相轉(zhuǎn)移催化劑，通過(guò)苯甲酰氯與硒氰酸鉀反應(yīng)合成了中間體苯甲醭鲈谙呱面茫基異硒氰酸酯se亚洲国产综合在线，該中間體不需分離，直接與芳胺反應(yīng)亚洲黄网页，得到N-苯甲?4小箩利裸体免费视频；璑'-芳基硒脲(2a~2p)，這些化合物用1H NMR黄频网站久久，IR及元素分析進(jìn)行了表徵鲁鲁视频在线观看，并用X射線單晶衍射確定了化合物2k的單晶結(jié)構(gòu)。

Synthesis and structural characterization of novel cycioplatinated complexes with 2-aryl imidazolines 2-arylimidazoline ligands 2a-2d were synthesized from benzoyl chloride or p-methoxybenzoyl chloride with aminoethanol or valinol and 2e was synthesized from 2-phenylimidazoline.

新型2-芳基咪唑啉環(huán)鉑化合物的合成與結(jié)構(gòu)表征以苯甲酰氯或4-甲氧基苯甲酰氯和氨基醇(2-氨基乙醇或外消旋的纈氨基醇)為原料iGAo视频网站在线观看，合成了四種2-芳基咪唑啉配體2a-2d免费无码又爽又刺激羞羞视频，以2-苯基咪唑啉為原料合成了配體2e，其中2d為新化合物欧美视频经典亚洲。