Phenyl or m -tolyl selenoamides reacted with functionalized α-haloacetic acid in 1∶1 or 1∶2 molar ratio with no catalyst in various alcohols to undergo a selenium transfer reaction. This reaction in dif-ferent molar ratios furnished the same C—Se—Se—C coupling products with a special structure bis diselenide. A new and facile method for synthesis of such bis(alkoxycarbonyl-methyl) diselenides with the advantages of mild reaction conditions, high yields, easy availability of starting materials and good chemical selectivity was provided.

芳基硒代酰胺與氯乙酸在各種醇中無催化劑下以1∶1和1∶2的比例投入国内精品一级无码免费播放费，發(fā)生硒轉(zhuǎn)移反應超碰动态图，不同原料投入比下的反應生成了同一種C—Se—Se—C偶聯(lián)產(chǎn)物——具有多功能團的二烷氧羰基甲基二硒醚成年人黄色视频在线免费，提供了一種新的合成二烷氧羰基甲基二硒醚的簡便方法中文字幕第9页亚洲，且反應具有條件溫和人人操人人肉人人、產(chǎn)率高中国黄色网站大全免费看、原料易得和選擇性好等優(yōu)點。

In order to explore the extraction method of proteome and technique of 2-DE, we compared the extraction method between the TCA-ac-tone and the Tris-HCl, and improved the key steps of 2-DE. The Tris-HCl extraction was the most appropriate for Antiaris toxicaria seed proteome analysis because of the highest resolution and more informative 2-DE map. Those were the solid basis for the later research of studying on the discrepancy expression proteomics of Antiaris toxicaria Seed.

在探索適合箭毒木種子蛋白質(zhì)組學研究雙向電泳方法中国产AV无码专区久久桃色，比較了三氯乙酸－丙酮沉淀法999精品无码一级A片、和Tris-HCl法，以及對雙向電泳過程中的關(guān)鍵步驟的改良成人黄色视频在线播放1，認為Tris-HCl法為最適方法三上悠亚精品区在线看AV网站，所得圖譜背景清晰，蛋白質(zhì)信息量最大在线精品自拍第一页，為箭毒木屬植物的差異蛋白質(zhì)組學的后續(xù)研究打下了堅實的基礎极品萝在线永久视频欧美。

We extract the lipid with hexane and then compare the removing effect of 20% trichoroacetic acid and 2.0mol/L chlorhydric acid after having condensed the extract.

將提取液濃縮后，利用正己烷萃取提取液中的脂溶性物質(zhì)啪啪啪不卡视频，然后分別測定在濃縮物中加入不同體積的20％的三氯乙酸及2mol／L的鹽酸的除蛋白效果精品一级片手机在线免费观看，結(jié)果顯示鹽酸為較佳的除蛋白試劑。

In this paper,we compared the photodegradation efficiency of nano-titania films by using dichloroacetic acid,rhodamine B and methyl orange as the photocatalytic referents and the ultraviolet lamp as the source light to generate the photocatalytic reaction.

針對納米氧化鈦光催化性能研究中缺乏統(tǒng)一有效表征標準的現(xiàn)狀国产毛片A片视频一区，比較了二氯乙酸粗大挺进尤物人妻中文字幕、羅丹明B和甲基橙三種光催化活性評價物的熱穩(wěn)定性和對紫外光的穩(wěn)定性，并以氧化鈦納米薄膜為光催化劑高清一区二区色视频，研究了三種評價物的光催化降解效率表征日本三级网站www中文字幕，以及酸堿度、通氧條件等因素對評價物在光催化活性表征中的影響及其機理美女被插出白浆，歸納了三種評價物對于納米氧化鈦光催化活性表征的優(yōu)缺點AV网站AV爱爱爱。

Glyoxylic acid was prepared by reaction of sodium hydroxide surplus with methyl dichloroacetate in methanol solution via neutralization of filtrate with 50 percentage sulfuric acid to pH 2～3 and hydrolyzation after separation of salts.

二氯乙酸甲酯和過量的氫氧化鈉在甲醇溶液中反應，濾出氯化鈉后人人色人人操人人射，直接加入適量的 5 0 %的硫酸調(diào) pH值為 2～ 3久久久久99精品免费，濾出硫酸鈉，蒸餾回收甲醇国产肏屄小视频，水解黄色操逼片、濃縮，得到不含乙二醛的 4 0 %乙醛酸溶液在线观看黄片毛片不卡。

Then, the multidentate amine immobilized on silica gel was used as ligand for CuCl in ATRA of CCl_4 with MMA and methyl trichloroacetate with St repeatly. The conversion and purity of the product were determined through the gas chromatography and ~1H NMR respectively. Finally, the multidentate amine immobilized on silica gel was used as ligand for CuCl in ATRP of St initiated by TCPP and MMA initiated by MMTCB. The number average molecular weights of the polymers were determined through GPC.

此多齒胺改性硅膠配體被分別多次重復用于四氯化碳與甲基丙烯酸甲酯欧美成人aⅴ在线播放，三氯乙酸甲酯與苯乙烯的ATRA反應中色呦呦一站二站，通過氣相色譜測定了原料的轉(zhuǎn)化率隨時間的變化，且通過核磁~1H NMR測定了產(chǎn)物的純度色中色污网站，我們還進一步將此種多齒胺改性硅膠配體用于TCPP引發(fā)St的ATRP和MMTCB引發(fā)MMA的ATRP反應中欧美性爱干，通過GPC測定所得聚合物的分子量。

Goodcatalytic activities of the phosphine palladium complexes were observed incarbonylation of benzyl chloride with atmospheric CO. In some reactions the yieldof phenylacetic acid was 91% and the catalyst could be reused repeatedly in severaltimes.

這些鈀配合物催化芐基氯的常壓羰基化反應有較好的催化活性不卡毛片日了日操了操，有些反應中苯乙酸的產(chǎn)率可達91％超碰在线综合网，可重復使用，是一類環(huán)境友好的新型綠色催化劑青春人人摸人人操人人干。

The influence of various parameters on clean-up of neomycin in milk, including the concentration of trichloroacetic acid, centrifugation speed, the flow rate and the concentration of eluent, were investigated.

考察了三氯乙酸濃度99国产精品久久久久、離心力的大小、樣品過固相萃取柱的速度以及洗脫劑濃度等因素對牛奶中新霉素測定結(jié)果的影響美女高潮黄又色高清视频。

The results showed that under the optimum conditions, the optimum conditions were determined that the microwave power for the two protases was 500W, and the microwave temperature was 46℃for Alcalase and 50℃ for Flavourzyme; the enzyme dosage was 9000U/g for Alcalase and 37.5LAPU/g for Flavourzyme, and the hydrolysis time was just 3min for Alcalase and 13min for Flavourzyme.

結(jié)果表明五十路漂亮无码，在最適微波條件下（堿性蛋白酶的微波溫度46℃，風味蛋白酶50℃欧洲性生活视频，微波功率均為500W）被cao的美女，堿性蛋白酶加酶量9000U/g，酶解3min五月丁香花综合网，風味蛋白酶加酶量37.5LAPU/g最新3D动漫H福利在线观看，酶解13min，得到的酶解產(chǎn)物的水解度為50.94%国内视频日韩精品视频在线播放，氮收率為96%久99久精品免费视频12，多肽得率34.45%，氮溶指數(shù)84.22%久久国产免费一区二区，三氯乙酸氮溶指數(shù)77.99%黄色网欧美。

Slight stress corrosion cracking phenomenon occurred accompanying with a little dot corrosion. On the other hand, sensitised treatment will decrease the IGSCC resistance of stainless steel.

依據(jù)乙二醇蒸發(fā)器所處的實際工況，模擬了三種不銹鋼材料的焊接接頭在敏化狀態(tài)和焊態(tài)下国产真实盗摄在线观看，在含有微量氯離子的甲酸乙酸介質(zhì)環(huán)境中的腐蝕現(xiàn)象日本va欧美大胆视频，實驗結(jié)果表明：三種不銹鋼材料的晶間腐蝕開裂敏感性很低，僅出現(xiàn)了輕微應力腐蝕開裂跡象www.xxxxx，并且伴隨輕微的點蝕A片一区二区三区视频大全。