This article introduces a simple method, which is acetylation method, to determinate the hydroxy content in petroleum oxidation products.

文章介紹了一種測(cè)定石油氧化物中羥值的簡(jiǎn)便方法——乙踝耘耐蹬?8；ā?/p>

It is found that when the molar ratio of sulphoxide,pyridine and acetyl bromide is 1∶0.6∶0.4,the catalytic effect on the ring-enlargment is the best,and the yield and purity of the final product can reach 76% and 97% respectively at a pH of 1.8 in toluene under refluxing for about 3.5h.

通過(guò)正交實(shí)驗(yàn)可得出以下結(jié)論：當(dāng)N国产黄色视频天天，N′-雙脲-亞砜為2.5∶1人人摸人人操人人人爱，乙酰溴-亞砜為0.4∶1，吡啶-乙酰溴為1.5∶1色哟哟网站进入方法，回流時(shí)間為3.5h偷拍偷窥高清网，酸化pH值為1.8時(shí)，擴(kuò)環(huán)反應(yīng)結(jié)果最好在线视频免费91，總收率可達(dá)76%91麻豆国产福利精品，純度97%以上。

Then we compared cleavage rate and blastocyst rate among different groups. After that we evaluated the quality of blastocysts by using ICM/TE (Inner cell mass/Trophectoderm cells) ratio via staining with propidium iodide and Hoechest333258, and analyzed the level of genome methylation and histone acetylation by immunofluorescence.

比較各組受精卵的卵裂率和囊胚發(fā)育率大学生国产在线；并應(yīng)用碘化丙啶和Hoechest333258對(duì)囊胚進(jìn)行染色日本一区二区三区喷水高潮，利用ICM/TE值評(píng)價(jià)各組胚胎體外發(fā)育的質(zhì)量；同時(shí)將囊胚進(jìn)行免疫熒光染色人操人人摸人人干，觀察其基因組甲基化和組蛋白乙跞毡疽患毒悠担化的水平。

acetyl chloride, a novel fluorescence derivatization reagent, has been developed for the determination of sterols and stanol .

采用熒光衍生化試劑2-(9-咔唑)乙酰氯级特大黄片视频影院国，對(duì)天然產(chǎn)物谷甾醇亚洲成a人片在线观看无码专区、豆甾醇、菜油甾醇及谷甾烷醇的柱前衍生化條件人人操午夜免费官网，包括催化劑的種類国产91福利啪、反應(yīng)溫度、衍生化時(shí)間等進(jìn)行了考察美女黄色大片免费观看，結(jié)果表明：催化劑選用三乙胺内地50岁熟妇网站，反應(yīng)溫度80℃，時(shí)間20min亚洲少妇无码视频，衍生產(chǎn)物具有恒定的最大檢測(cè)響應(yīng)值黄色福利视频网站。

Three methods for the preparation of 1,2,4-trizolone~5 are provided. 22 compounds are prepared. 3, 4-disubstituted 1,2,4-trizolone-5 is prepared by reacting amide with ethyl hydrazine-fornate at 110癈 for 3h in the presence of phosphorus oxychloride, following neutralization and cyclization reaction, giving to 74.5 % yields,which is 30% more than the literature value.

以三氯氧磷為縮合劑，使酰胺和肼基甲酸乙酯在110℃反應(yīng)3h日本亚洲视频，經(jīng)堿中和国产真人无码AV一级一级、環(huán)化反應(yīng)，合成3，4-二取代-1A片网站视频在线观看，2另类黑人欧美啪啪亚洲图片，4-三唑酮-5，兩步反應(yīng)總產(chǎn)率達(dá)74.5％无遮挡aa一级毛片孕妇，與文獻(xiàn)報(bào)道值相比激情图片小说视频，高出了30％以上，在三唑酮類衍生物的合成方法中具有很大的突破性性小说视频。

Then dendrimer-like polyamidoamine s based on the silica gel surface were prepared using Micheal addition of the amino and methyl acrylate,and ester-exchange of ethylene diamine and the ester group.

用硅烷偶聯(lián)劑對(duì)硅膠表面進(jìn)行氨基功能化在线看黄免费不卡，利用氨基與丙烯酸甲酯發(fā)生的Michael加成反應(yīng)和乙二胺與酯進(jìn)行的交換反應(yīng)在硅膠表面合成了聚酰胺-胺樹(shù)狀大分子；利用紅外光譜對(duì)PAMAM-SG的結(jié)構(gòu)進(jìn)行了表征日韩a级毛片AV一区免费在线观看，研究了溶液pH值人人摸人人操人人爰、ρ(Ni2+)和溫度對(duì)PAMAM-SG吸附Ni2+能力的影響。

acetyl value：乙酰價(jià),乙酰值

2,3-戊二酮 acetyl propionyl,2,3-pentanedione | 乙酰價(jià),乙酰值 acetyl value | 乙酰化已二酸雙淀粉 acetylated distarch adipate

acetylation value：乙跆焯焯硖焯旄桑化值

acetylating agent | 乙跖访酪患禔片欧美大片在线视频；瘎?| acetylation value | 乙酰(化)值 | acetylation | 乙酰化作用

acetyl ricinoleate：乙酰蓖麻(醇)酸酯

acetyl content 乙酰含量 | acetyl ricinoleate 乙酰蓖麻(醇)酸酯 | acetyl saponification value 乙酰皂化值

acetyl number; acetyl value：乙酰值;乙酰價(jià)

乙酰輔酶A acetyl coenzyme A; acetyl Co A | 乙酰值;乙酰價(jià) acetyl number; acetyl value | 乙蹙辆涟夥咽悠稻饭劭?9；?acetylation

acetyl oxide：乙豕纷耘耐担化氧,乙(酸)酐

acetyl number || 乙酰值 | acetyl oxide || 乙酰化氧, 乙(酸)酐 | acetyl phosphate || 乙酰磷酸

acetyl saponification value：乙酰皂化值

acetyl ricinoleate 乙酰蓖麻(醇)酸酯 | acetyl saponification value 乙酰皂化值 | acetyl value 乙酰值

acetyl salicylic acid：阿司匹林

acetyl phosphate ==> 乙酰磷酸 | acetyl salicylic acid ==> 阿司匹林 | acetyl saponification number ==> 乙酰皂化值