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The pigment in colored cotton fibers was extracted by methanol at room temperature. The results of color reactions HCl-Mg reaction, NaBH4 reaction, NaOH reaction, FeCl3 reaction and Pb(Ac2 reaction of the pigment extractive showed that the pigment extracted by methanol was flavone or flavonol with two adjacent hydroxide groups (Table 2, Fig. 1). The results of UV spectral analysis further proved that the pigment extracted by methanol from brown fiber belonged to flavone with two adjacent hydroxide groups in B ring, and that from the green fiber contained not only flavone but also flavonols with two adjacent hydroxide groups both in A ring and B ring and indican replaced a hydroxide group at 3-site of A ring Fig.

通过盐酸-镁粉反应、四氢硼钠还原反应、碱反应、醋酸铅反应、氯化铁反应和紫外光谱吸收的分析表明,甲醇室温提取的棕色棉纤维色素可能是黄酮类化合物,B环上带有邻二酚羟基;甲醇室温提取的绿色棉纤维色素除黄酮类化合物外,还含有3-位羟基被糖甙化的黄酮醇类化合物,A、B环上都带有邻二酚羟基。

In treatment of lead poisoning with Na-DMS or Ca-Na2-EDTA, the time of alleviation of lead colic and the increase of urinary lead were similar in both chelating agents.

二疏基丁二酸钠是我国年来的临床应用,对两药的某些疗效与副作创制和创用的治疗铅中毒的有效药物。

Some research and analysis on the reaction of 2,4-difluoronitrobenzene and nucleophilic reagent alcohol sodium (methyl alcohol ,ethyl alcohol, propyl alcohol, n-butyl alcohol, t-butyl alcohol, et hl) and the reaction choice of opposite -F in different solvent and conditions have done in this paper.

论文以2,4-二氟硝基苯为主要原料,研究了其与亲核试剂醇钠(甲醇、乙醇、丙醇、正丁醇、叔丁醇等)在不同溶剂中的反应情况,讨论了在几种代表性的溶剂——醇、四氢呋喃、苯、N,N-二甲基甲酰胺中亲核取代反应的情况,研究了温度、反应时间、亲核试剂、溶剂等条件对亲核取代反应的影响。

The first and second insert organophilic montmorillonite are prepared from sodium dodecylsulfonate and cetyltrimethylammonium bromide.

采用十二烷基磺酸钠及十六烷基三甲基溴化铵对蒙脱土进行了一次、二次插层改性,红外光谱和X射线衍射表明,两种有机插层剂均已进入蒙脱土的层间,有机蒙脱土的层间距由1.22 nm增加到3.64 nm;沉降实验结果表明这种改性蒙脱土在有机介质中表现出很好的分散性。

And then the deposition of CaCO3 took place on the multilayers by dipping them into a supersaturated CaCO3 solution.

将聚苯乙烯磺酸钠与聚二烯二甲基氯化铵用逐层浸渍的方法使其组装成多层膜,用于诱导过饱和溶液中CaCO3的结晶,详细研究了膜紫外吸收随组装层数增加的线性变化。

To investigate the relationships between the tolerance difference to high temperature stress and superoxide dismutases in different cultivars of Celosia cristata, ten-leaf stage seedlings of the heat-tolerant cultivar, Century Green and the heat-sensitive cultivar, Century copper were pulsed for 48 h with diethyldithiocarbamate pretreatment and subjected to high temperature stress under controlled conditions of relative humidity of 75%~90%, 12 h/24 h photoperiod with 1 500 lx and 45 ℃, to research the changes of external morphology and interior physiology.

李永红;魏玉香深圳职业技术学院应用化学与生物技术学院,深圳 518055摘要为研究鸡冠花品种间耐热差异与超氧化物歧化酶之间的关联,选用鸡冠花耐热品种世纪绿叶和热敏品种世纪铜叶的10叶期幼苗为试材,用二乙基二硫代氨基甲酸钠进行48 h预处理之后,在45 ℃、相对湿度75%~90%,、光照1 500 1x (12 h/d)条件下进行热胁迫处理,研究其形态和生理生化的变化。

The hNaDCS (human Na+/dicarboxylate cotransporter 3) mediates the transport of Krebs cycle intermediates, such as succinate, citrate and a-ketoglutarate, across the plasma membrane of many epithelial cells.

摘要人钠/二羧酸协同转运蛋白3(human Na~+/dicarboxylate cotransporter3,hNaDC3)基因的编码产物是位于多种上皮细胞膜表面的一类介导琥珀酸、枸橼酸及α-酮戊二酸等三羧酸循环中间产物转运的蛋白。

The properties of surface chemistry and micellar aggregation number of a special anionic surfactant with two hydrophilic head groups linked by a rigid structure- disodium hexadecyl diphenyl ether disulfonate (C16-MADS) was determined respectively.

测定了由刚性基团联接的特殊双亲水基型阴离子表面活性剂——十六烷基二苯醚二磺酸钠(C16- MADS)的表面化学性能及胶束聚集数,并考察了表面活性剂浓度和体系温度对Nm的影响。

This paper confirmed that the microcapsule from sodium alginate and which is used in carbonless copy paper by single cogulation process owns higher embedding ratio and better nonpermeability stableness and strength.

本文对以海藻酸钠为壁材、以结晶紫内酯的邻苯二甲酸二丁酯溶液为芯材通过单凝聚法制备无碳复写纸用微囊的工艺条件进行了研究,制定了工艺路线和流程,确定了最佳的乳化条件、絮凝条件、固化条件以及壁材浓度、芯壁比,并对成品微囊进行了应用性的对比分析。

The micelle shape transformation of tert-octylpheny phenol polyethylene glycol ether (TX-100), sodium dodecyl benzene sulfonate and tetradecyl trimethyl ammonium bromide in heavy water solutions was studied by 1H nuclear magnetic resonance spectroscopy, including an NMR self-diffusion experiment. These experiments showed that the surfactants formed several shapes of micelles (spherical, ellipsoidal, and rodlike) at the respective concentrations which were far above their critical micelle concentration.

运用核磁共振一维氢谱和自扩散实验方法研究了聚乙烯乙二醇异辛酚醚(TX-100)、十二烷基苯磺酸钠和十四烷基三甲基溴化铵三种不同类型的表面活性剂在重水溶液中的胶束形状转变,发现它们在临界胶束浓度以上的各自相应浓度都有胶束形状的变化(由球状转变为椭球状或棒状)。

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