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碱性化

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The results showed that the solubility of lotus starch was low, the turgidity was closed to sweet potato starch, accordingly was a restrictive swelling starch. A lower transparency (10.4%) was researched in the lotus-seed starch pastes, condensation speed was faster, but it decreased at acidic or alkaline condition. Stronger freeze-thaw stability and lower gel strength was researched in it. It can be from the Brabender viscosity that the lotus-seed starch has a higher gelatinization temperature (77.1℃), better thermostability, stronger retrogradation, weaker cold viscosity stability.

试验结果表明:莲子淀粉的溶解度较低,膨润力接近甘薯淀粉,属限制型膨胀淀粉;莲子淀粉糊的透明度较低(10.4%),凝沉速度较快,在酸性或碱性条件下凝沉速度减缓;其凝胶具有较强的冻融稳定性和较低的凝胶强度;布拉班德粘度曲线显示,莲子淀粉的糊化温度较高达77.1℃,热稳定性好,凝沉性强,冷粘度稳定性差。

The distributions of aminoacylase and alkaline phosphatase had been studied in the common seaweeds in Dalian area, and the Ulva pertusa Kjellm had been chosen as the target for isolation and purification. These two enzymes had been purified for a single band in the SDS-PAGE and their basic characteristics had been studied, too.

研究了氨基酰化酶和碱性磷酸酶在大连地区常见海藻中的分布状况,从中筛选出孔石莼作为纯化研究对象,并从孔石莼中分离纯化出了这两种酶,纯度达到了聚丙烯酰胺凝胶电泳一条带。

Adenosine was used as the raw material, dissolved in triethyl phosphate and then esterified with thiophosphoryl chloride under 0~5℃ for 8h without water and oxgen, in alkaline condition provided by 2,6-dimethylpyridine, introducing thiophosphoryl ester to adenosine.Then superfluous triethylamine was added and reacted under 5℃ for 1h to synthesize rough 5'-AMPS.The unpurified product was appled to a DEAE Sephadex A-25 column and eluted with triethylammonium bicarbonate.

用腺苷为起始原料,溶解于磷酸三乙脂中后,在无水无氧环境中及2,6-二甲基吡啶提供的碱性条件下与三氯硫磷以0~5℃下发生酯化反应8h,将硫代磷酸酯引入腺苷,然后再与过量三乙胺在5℃下反应1h,合成粗产品,再用碳酸氢三乙胺作洗脱液,过DEAE Sephadex A-25凝胶柱纯化。

Macroporous tributyl amine aminating strongly basic anion exchange resin-a phase transfer catalyst with high catalytic activity for nucleophilic substitution,which was screened out via combinatorial chemistry method –was used to catalyze the nucleophilic substitution reactions for synthesis of benzyl acetate,benzyl propionate,benzyl butyrate and benzyl valerate.

用组合化学方法筛选出的对无外加碱条件下的亲核取代催化活性最高的聚合物季铵盐–三丁胺胺化强碱性阴离子交换树脂为相转移催化剂,催化合成了乙酸苄酯、丙酸苄酯、丁酸苄酯、戊酸苄酯等羧酸苄酯。

For the pressure of gas, liquid or of acidity, alkalinity, aldehydic, chonice and chloride medium with high viscosity and corrosivity.

测量气体、液体、粘度较大的酸性、碱性、醛化、氯气或氯化物及含有固态浮游物等腐蚀性较强的介质压力。

For the pressure of gas, liquid or ofacidity, alkalinity, aldehydic, chonice and chloride medium withhigh viscosity and corrosivity.

测量气体、液体、粘度较大的酸性、碱性、醛化、氯气或氯化物及含有固态浮游物等腐蚀性较强的介质压力。

Results The tissue of 3 cases of ACC in the esophagus was mainly composed of square shape gland epithelial cell and variant myoepithelial cell, mesh shape cavity crack and the tubular, the entity shape arrangement, the cavity crack content basophilia and acidophilia the secretion. There was transmigration of superficial epidermis in 1 case of ACC; All 3 cases were positive of CK, H-CK, P63, S-100 (endochylema /nucleus), EMA, and Bcl-2. Case 3 was positive of CerbB-2 and P53. Case 2 was CD117, AAT, SMA, PAS/AB.

结果 3例食管腺样囊性癌的癌组织主要由立方形腺上皮细胞和变异的肌上皮细胞组成,呈筛孔状腔隙、管状、实体状排列,腔隙内含嗜碱性和嗜伊红分泌物;3例食管腺样囊性癌中例1表面上皮有移行;免疫组化:3例CK、H-CK、P63、S-100、EMA、Bcl-2均,例3 CerBb-2,P53,例2 CD117,AAT、SMA,PAS/AB。

The initial interaction modes of pyreno[2,1-b]pyrrole and its dimeric derivative with F in MeCN can be understood as hydrogen-bonded complexes. Excess F ions promotes deprotonation of N-protons and results in the bathochromic changes in both absorption and fluorescence spectra.

实验过程中发现,在初始模式中,芘骈吡咯及双芘骈吡咯与氟离子形成氢键附合物;之后加入的氟离子,因其带有极强的碱性,将促使吡咯官能基中氮上氢进行去质子化,而造成吸收及萤光光谱的红位移现象。

Five polychlorobiphenyl monomers were synthesized by addition-elimination reaction between chloric aniline and benzene in the presence of alkaline.

在碱性的条件下,以氯代苯胺为重氮化试剂,与苯、氯苯等发生加成反应,合成了5种多氯联苯单体,其结构经1H NMR和IR表征。

After derivatization with 9-fluolenylmeghyl chloroformate at 40℃ in alkalescent environment (pH=8.0), taurine in samples was separated and quantified by HPLC.

在硼酸盐缓冲溶液存在的弱碱性(pH=8.0)环境中样品中的牛磺酸与9-氯甲酸芴甲酯在40℃水浴中反应生成衍生化产物,用反相高效液相色谱法检测定量。

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