In chapter three, the activating agents of ytterbium have been examined. Barbier-type reaction promoted by ytterbium metal was examined. The experimental results shown that the yield of Barbier reaction of imines with allylic bromide promoted by ytterbium is higher than that of aldehydes and ketones with allylic bromide under the same reaction conditions. In this chapter, the reductive cleavage of Se-Se and S-S bond induced by ytterbium metal was also studied.

首先研究了金屬鐿的活化劑以及活化方法，接著考察了金屬鐿促進的Barbier反應及其在合成高烯丙基胺和高烯丙基醇中的應用亚洲一区二区视频观看，以及影響該反應的主要因素；究了金屬鐿促進的二硫醚和二硒醚的S—S鍵和Se—Se鍵的還原斷裂99久久精神视频，繼而與氯代烴人人操人人在线，胺基甲酰氯反應生成相應的硫醚a毛片免费全部播放完整网站，硒醚日本中文字幕系列网站，胺基甲酸硫代酯和硒代酯国产精品自拍九。

objective:to determine glucosinolates in draba nemorosa var.leiocarpa and provide the basic and science data for further development.methods:sulfate ion precipitation method was used.results:glucosinolate content was 0.95% in draba nemorosa var.leiocarpa.conclusion:there are more glucosinolates in draba nemorosa var.leiocarpa,which has greater value.

目的：測定光果葶藶全草中硫代葡萄糖苷的總含量久久婷婷国产综合日韩欧美，為進一步研究開發(fā)提供基礎科學資料人人插人人做。方法：采用硫酸根離子沉淀法。結果：光果葶藶全草中硫代葡萄糖苷總含量為0.95%。結論：光果葶藶全草中硫代葡萄糖苷含量高一区二区黄色大片，有較大的開發(fā)價值。

The method comprises:(1) weighing lead acetate hexahydrate and thioacetamide, and preparing aqueous solutions respectively, so that the concentration ratio of Pd2+ to S is 1:(1-4);(2) adding acetic acid into thioacetamide solution to adjust the pH value to 2-4;(3) adding poly surfactant into lead acetate solution, ultrasonicating to mix uniformly and obtain a colorless and transparent sol;(4) mixing the sol and thioacetamide solution;(5) placing the mixed solution in a sealed container, irradiating by 2.5 MeV and 40 mA electron accelerator with irradiation dose of 25-40 Mrad;(6) washing the product, centrifuging for separation, and drying to obtain black PdS nanoparticles.

本發(fā)明方法的工藝過程如下：首先稱取一定量的六水合醋酸鉛和硫代乙酰胺国产一级黄色无码，各自配制成水溶液，其濃度比為使其中的鉛離子濃度與硫原子濃度的比例為1∶1～1∶4免费无码网站永久在线播放；在硫代乙酰胺溶液中加入適量醋酸調節(jié)其pH值至2～4；醋酸鉛溶液中加入少量表面活性劑聚乙烯醇好大好深好猛好爽好湿视频，然后超聲振蕩，混合均勻，制成無色透明溶膠；隨后將溶膠與上述的硫代乙酰胺溶液混合一级黄色毛片操逼的视频；將該混合液置于密閉容器中综合网激情四射，并將其放置于2.5MeV黄色A片福利视频、40mA的電子加速器產(chǎn)生的電子束輻照下進行輻照處理一级AAA毛片无码视频，其輻照劑量為25～40Mrad；然后將反應生成物清洗黄色网站在线观看2019，并用高速離心機離心分離，然后干燥女人的逼逼视频，最終得到黑色納米硫化鉛顆粒国产成年综合。

Analysis of the material change, garlic cells bioactive aliphatic thio cysteine sulfoxide and thiosulfate propenyl cysteine sulfoxide sulfur compounds in garlic, such as the role of enzymes, the generation of thiobarbituric acid sub - ester, propylene-based thiosulfinates, allyl thiosulfinates as garlic pigment precursor substances, and further changes occurred in the green garlic.

從物質變化分析国产欧美在线一区,二区三区，大蒜細胞中的生物活性物質硫代脂肪族半胱氨酸亞砜和硫代丙烯基半胱氨酸亞砜等含硫化合物在蒜酶的作用下，生成硫代亞磺酸酯www.自拍偷拍.com、丙烯基硫代亞磺酸酯亚洲无码操B视频、烯丙基硫代亞磺酸酯免费毛片入口，作為大蒜色素物質的前體一级黄色网一级黄色网站，進一步發(fā)生大蒜綠變A级毛片,黄,免费观看m。

Besides, the derivatives were synthesized successfully by the similar acid binding agent system, such as tris(4-nitrophenyl) thiophosphate, tris(4-toluene)thiophosphate. The derivative of maleic anhydride was synthesized by the simple method, and its yield was above 90%.

采用類似的縛酸劑體系成功地合成了硫代磷酸三(4-硝基苯)酯、硫代磷酸三(4-甲基苯)酯，并用簡單的方法合成了硫代磷酸三(4-氨基苯)酯的馬來酸酐衍生物——硫代磷酸三(4-馬來酸氨基苯)酯亚洲天堂在线视频观看，產(chǎn)率達90％以上97超碰资源人妻。

Five of their single crystals were obtained and their structures were determined by X-ray diffraction. By comparison, it was found that dithiocabamate complexes often formed an exactly planar MS4 unit, such as [Mo(R2dtc)2]; and also formed a special MS 5 unit, such as [Cu2(R2dtc)4], the copper atom lies in a distorted square-pyramidal environment.Four kinds of heteropoly acids were prepared and characterized; a series of solid superacid catalyst of supported heteropoly acid were prepared and characterized; regioselectivites of chlorobenzene mononitration with nitric acid with different heteropoly acid on different supports and reaction conditions have been investigated.

培養(yǎng)并解析了5個該類配合物的單晶結構一级A爱A片免费观看，通過比較国产jlzzjlzz视频免费，發(fā)現(xiàn)二硫代氨基甲酸鹽與過渡金屬容易形成四配位結構，金屬原子與4個硫原子共平面国产精品免费看久久久无码蜜柚，比如二乙基二硫代氨基甲酸鉬；也能形成比較特殊的五配位結構，比如二乙基二硫代氨基甲酸雙核銅，Cu原子與5個S原子相連AⅤ资源网影音先锋，處于一個變形的四方錐結構的配位環(huán)境国产精品国产精品国产精品。

Glucosinolates and myrosinase are present in the vacuoles and in the de finite protosome in intact cell and tissues respectively. but when tissues and c ells are damaged, myrosinase will release and hydrolyze glucosinolates to genera te degraded products, such as isothiocyanates and so on.

在完整的植物中国模大尺度A片在线观看，硫代葡萄糖苷存在于細胞的液泡中国产精品猎奇国产精品无码，葡萄糖硫苷酶存在于特定的蛋白體中，兩者相互分離欧美乱人伦中文在线观看暴力，但當組織和細胞受到損傷時在线观看性爱视频，葡萄糖硫苷酶就會被釋放出來，葡萄糖硫苷酶將硫代葡萄糖苷水解美女被操网站视频，產(chǎn)生異硫代氰酸鹽等降解產(chǎn)物一本一道波多野结衣av无码。

Thiobarbituric acid was synthesized by sulfourea and diethyl malonate in sodium alcohol and 5-Arylidene thiobarbituric acid was prepared by the Knoevenagel condensation reaction from benzaldehyde and thiobarbituric acid.

采用丙二酸二乙酯和硫脲在乙醇鈉存在下合成了硫代巴比妥酸，再分別采用固相反應和水相反應能免费看av的网站，由硫代巴比妥酸和苯甲醛經(jīng)Knoevenagel縮合反應，制備了5-亞芐基硫代巴比妥酸。

TrithiocarbonatesS,S\'-bis (α,α′-dimethyl-α-acetic acid) trithiocarbonate (TTC1),3-(2-carboxyethylsulfanylthiocarbonylsulfanyl) propionic acid (TTC3),2-(2-carboxyethylsulfanylthiocarbonylsulfanyl) propionic acid (TTC4) and2-(2-carboxyethylsulfanylthiocarbonylsulfanyl)-2-methylpropionic acid (TTC5) weresynthesized by phase transfer method.

用相轉移法合成了Swww.欧洲视频在线观看，S′-二(α9299yy看片婬黄大片在线，α′-甲基-α&-乙酸)三硫代碳酸酯(TTC1)、S，S′-二丙酸三硫代碳酸酯(TTC3)、S-丙酸-S′-三硫代碳酸酯(TTC4)和S-丙酸-S′-(α，α′-甲基-α&-乙酸)三硫代碳酸酯(TTC5)激情国产在线观看美女图片大全。

The degradation properties of sulfide flotation collectors such as Xanthogenate, Dithiocarbamate, Dithiophophate, N,N-dialkyl-dithiocarbamatecyanoethylene and Thionocarbamate are studied in this paper.

論文研究了黃原酸鹽内射合集在线视频、氨基二硫代甲酸鹽、二硫代磷酸鹽精品中文性爱、氨基二硫代丙烯腈酯、氨基硫逐甲酸酯等硫化礦捕收劑的降解性能。

ammonium thiocyanate：硫代氰酸銨,硫氰酸銨

ammonium tartrate 酒石酸銨,酒石酸銨 | ammonium thiocyanate 硫代氰酸銨,硫氰酸銨 | ammonium thiosulfate 硫代硫酸銨

dithiobenzoic acid：二硫代苯甲酸

dithio-salicylic acid 二硫代水楊酸 | dithiobenzoic acid 二硫代苯甲酸 | dithiocarbamic acid 二硫代氨基甲酸

thioacetic acid：硫代醋酸,硫代乙酸

thio-alcohol 硫醇 | thioacetic acid 硫代醋酸,硫代乙酸 | thioalcohol type 硫醇型

thioarsenic acid：四硫代砷酸

四硫代銻酸 thioantimonic acid | 四硫代砷酸 thioarsenic acid | 三硫代亞砷酸 thioarsenious acid; thioarsenous acid

thioarsenious acid; thioarsenous acid：三硫代亞砷酸

四硫代砷酸 thioarsenic acid | 三硫代亞砷酸 thioarsenious acid; thioarsenous acid | 硫羰基;硫甲酰基 thiocarbonyl

ammonium thiocarbonate：三硫代碳酸銨

四硫代銻酸銨 ammonium thioantimonate | 三硫代碳酸銨 ammonium thiocarbonate | 硫氰酸銨;硫氰化銨 ammonium thiocyanate; ammonium thiocyanide

thiolactic acid：巰丙酸;硫代乳酸

硫乙酸;硫醋酸 thiolacetic acid; thioacetic acid | α-巰丙酸;硫代乳酸 thiolactic acid | 巰甲酸;一硫代碳酸 thiolcarbonic acid

thioresorcinol：硫代間苯二酚

thioresorcin 硫代間苯二酚 | thioresorcinol 硫代間苯二酚 | thioridazine 硫利達嗪 硫醚嗪 甲硫噠嗪

thiostannic acid：三硫代錫(IV)酸

三硫代硅酸 thiosilicic acid | 三硫代錫(IV)酸 thiostannic acid | 二硫代錫(II)酸 thiostannous acid

thiostannous acid：二硫代錫(II)酸

三硫代錫(IV)酸 thiostannic acid | 二硫代錫(II)酸 thiostannous acid | 硫代硫酸 thiosulfuric acid