Methods Polysulfated DS was prepared with chlorosulfonic acid and the main disaccharide units were determined with 1H-NMR and 13C-NMR.

方法用氯磺酸磺化制備多硫酸化DS99在线精品免费视频。測(cè)定其1H-NMR和13C-NMR光譜確定主要雙糖單位。

DFA-PEG polyester was synthesized with DFA and PEG 400 at first, and then bysulfating DFA-PEG polyester with NH_2SO_3H or terminating DFA-EG polyester withrosin acid, two derivant, these are sulfated DFA-PEG polyester and terminateDFA-PEG polyester, were synthesized. The reaction conditions of synthesis wereoptimized by orthogonal experiments.The molecular weight of product was analyzed by GPC.

5以二聚脂肪酸和聚乙二醇400為原料黄页网站欧美在线观看免费，首先合成了DFA-PEG聚酯哦美黄色视频，再以DFA-PEG聚酯為衍生體，硫酸化或用松香封端在线午夜视频，合成了兩種DFA-PEG聚酯衍生物——DFA-PEG聚酯硫酸酯鹽和松香酸封端DFA-PEG聚酯久久精品首页，通過(guò)正交試驗(yàn)黄色网站在线观看欧美，對(duì)合成的條件進(jìn)行了優(yōu)化。

Such structural complexity is further enhanced by O-acetylation, esterification, lactonization, as well as other forms of substitutions, reflecting significance of carbohydrates in cell recognition.

細(xì)胞表面上糖綴合物的糖鏈經(jīng)常以多/寡聚體形式存在中国a片黄色录像，并且結(jié)構(gòu)復(fù)雜黄色一级视频黄色一级视网站，常常大量表達(dá)唾液酸、糖醛酸在线视频一区亚洲、硫酸化糖基等酸性糖日e色视频在线观看，并發(fā)生O-乙酰化九九色无码精品网、酯化和內(nèi)酯化等修飾欧美性视。

Myristic monoethanolamide ammonium sulfatewas synthesized from myristic acid and monoethanolamide with sulfamic acid as sulfating agent .

在芳烴類溶劑與羰基化合物催化劑存在下，以肉豆蔻酸和乙醇胺為原料涩涩视频在线观看十八岁以下勿进，氨基磺酸作硫酸化劑欧美曰屁视频，制備了肉豆蔻酸單乙醇酰胺硫酸酯銨鹽。

The main reactions are (1) dehydration,(2) sulphatization of different oxides with acid vapor, and (3) partial decomposition of ferric sulphate.

此時(shí)的反應(yīng)是：(1)脫水日韓美女一級黃片免費；(2)各種氧化物被硫酸蒸汽硫酸化最新精品国偷自产在线97；(3)硫酸高鐵的部分分解。

In the first stage (230—300℃) the sulphatization of oxides on the one hand and the prevention of acid evaporation loss on the other should be both satisfied.

第一階段(250—300℃)應(yīng)滿足使氧化物硫酸化和阻止硫酸蒸汽蒸發(fā)逸散損失的雙重要求www..com黄色A片免费观看。

There is intimate relationship between biological activity and structure of sulfated chitosan.

殼聚糖硫酸酯是殼聚糖硫酸化的產(chǎn)物黄片一级域名，具有抗凝血、抗病毒欧美性爱,亚洲、抗腫瘤等生物活性黄页网站1688www欧洲人妻毛片，在海洋藥物和生物功能材料方面很有應(yīng)用前景。

The orthogonal experimental design was applied to investigate the effects of zirconia source Zr(NO34·5H2O, ZrOCl2·8H2O,precipitants and sulfating agent (sulfuric acid, ammonium sulfate) on the catalytic performance of the catalysts unde the most superior condition .The catalytic activity was tested in esterification of acetic acid with butanol .

在最優(yōu)的條件下用正交設(shè)計(jì)法考察鋯源（Zr(NO3)4·5H2O三级片在线无码，ZrOCl2·8H2O）日韩黄色视频品爱、沉淀劑和硫酸化試劑對(duì)催化劑性能的影響，并通過(guò)乙酸和正丁醇的酯化反應(yīng)的酯化率檢測(cè)所制備的SO4/ZrO2催化劑的催化效果999A片免费看在线播放。

The Residue on Ignition / Sulfated Ash test utilizes a procedure to measure the amount of residual substance not volatilized from a sample when the sample is ignited in the presence of sulfuric acid according to the procedure described below.

熾灼殘?jiān)?硫酸化灰分檢測(cè)是當(dāng)根據(jù)下面所述的步驟使樣品在有硫酸的情況下灼燒后群p网站，測(cè)量未揮發(fā)的殘留物質(zhì)量的方法。

The catalyst under high temperature hydrolysis into fatty acids and glycerol, with the metal oxides can happen saponification reaction, Formation of metal soap and glycerin, but also for halide, sulfate, sulfonation, oxidation, hydrogenation, polymerization and pyrolysis reaction.

可在催化劑作用下高溫水解成脂肪酸和甘油女生按摩破处视频在线观看，與金屬氧化物能發(fā)生皂化反應(yīng)日日骚一区二区，生成金屬皂和甘油，還可進(jìn)行鹵化亚洲一区二区无字幕、硫酸化在线免费黄站、磺化、氧化日韩国产欧美亚洲、氫化午夜理论在线、聚合、熱解等反應(yīng)乱中年熟女伦av一区。