生物化学

PAA/PVA IPN hydrogels were prepared by a sequential method by which acrylic acid firstly. polymerizes and cross-links in PVA/water solution with UV irradiation,then PVA physical cross-linked hydrogels are formed in cross-linked PAA networksby freezing-thawing. The orthogonal test design method was used to optimize theexperimental conditions based on the mechanical and swelling properties of thehydrogels. The effect of the PAA and crosslinking agent contents on the microscopicmorphology of the PAA/PVA IPN xerogel was investigated by transmission electronmicroscopy, and on the mechanical properties of the hydogels was studied bymeasurements of mechanical properties.

针对水凝胶强度、生物相容性和刺激响应性的需要，选择了以PVA和PAA为复合水凝胶的基本分子结构；采用顺序IPN方法制备PAA／PVA IPN水凝胶，即将单体丙烯酸与PVA溶液共混，AA经紫外光辐射聚合交联在PVA溶液中形成PAA化学交联网络，再经冰冻—解冻循环过程在PAA网络内形成PVA物理交联网络。

It was postulated, and now is widely accepted that...

对它们的化学、生物活性方面的研究一直是个非常活跃的领域。

Objective To establish a HPLC method for the determination of aceclofenac in human plasma.Methods Acidified samples of plasma (500μL) were extracted with 4 mL of ethyl acetate. The organic phase was evaporated to dryness by nitrogen at 40℃ water bath. The residue was redissolved in mobile phase and then was determined.

醋氯芬酸是一种具有镇痛作用的非甾体类抗炎药物[1]，化学名为[邻-(2，6-二氯苯基)氨基]苯乙酰乙酸，l992年首先于西班牙上市，具有明显广泛的抗炎作用和强力的解热镇痛作用，其生物半衰期较双氯芬酸长，胃肠耐受性较双氯芬酸好，抗炎活性优于萘普生和保泰松[2]。

Mathematical remixing, physical remixing, chemical remixing and biological remixing are the forms of expression in economic genomics.

经济和资产的数学重组、物理重组、化学重组和生物重组是经济基因学的表现形式。

It is an effective way to use the appropriate narrow bandgap nanosize semiconductors that is stable in chemical and biochemical conditions and not pollute the surroundings in reaction, which sensitizes nanocrysalline titanium dioxide carriers synchronously to prompt the utilization of the solar spectra and the efficiency of photocatalysis.

利用染料分子作表面敏化半导体材料和利用杂质掺杂来实现宽禁带半导体吸收光谱的扩展有一定的局限性，采用化学和生物惰性且对环境不产生二次污染的窄禁带半导体敏化同时考虑团簇颗粒粒径对载体性能的影响，是提高纳米二氧化钛光催化剂对阳光的吸收利用率和量子效率的有效方法。

Keywords : carboxylic acid amide; fungicides;chemical structure; biological activity; modes of action; fungicide resistance

中文关键词：羧酸酰胺类；杀菌剂；化学结构；生物活性；作用机制；抗药性

However, the ratio of the unsaturated and saturated fatty acid amide is relatively stable in downcore indicating that there is no selectivity between those two types of fatty acid amides during diagenesis processes, including biological, chemical and physical degradation. For this reason, we suggested that the depositional environment in Qarhan paleolake was relatively aerobic during the organic component deposition.

另一方面，不饱和脂肪酸酰胺与饱和脂肪酸酰胺的相对量的比值在剖面上并没有呈现明显下降的趋势，说明各种生物、物理及化学作用对饱和与不饱和脂肪酸酰胺的降解过程不存在明显的选择性，指示了有机质在沉积过程中处于一个偏氧化的环境。

The calcium ion was assumed the representative ion in hydration products and the chemical dynamics model was established which describes the chemical reaction between hydration products in solidification sludge and acid.

2将水化产物中的钙离子作为代表性离子，建立了固化污泥中水化产物和酸反应的化学动力学模型；采用生物反应器强化微生物活性建立了固化污泥中机物降解的动力学模型。

Compared with the control, the percentages of living microorganisms on the biomembrane were 27.6, 14.1 and 0.01, respectively, after extracted by hydroxylamine hydrochloride （0.01mol·L^-1 NH2OH·HCl ＋ 0.01mol·L^-1 HNO3 ）, sodium dithionite （ 0.4mol·L^-1 Na2S2O4, pH 6.0 ）, and acidified ammonium oxalate.

经0.01mol·L^-1 NH2OH·HCl＋0.01mol·L^-1 HNO3、0.4mol·L^-1 Na2S2O4（pH6.0）和0.2mol·L^-1草酸氨（pH4.0）萃取后存活的微生物总量分别下降到原膜的27.6％、14.1％和0.01％；经15％HNO3萃取后，膜上只有极少数的细菌存活；而经H2O2／HNO3萃取后则无细菌存活、原生动物和藻类存活，说明选择性化学萃取剂的使用影响生物膜的活性。

Reviews the removal methods of formaldehyde, including physical adsorption method , chemical method and biological method.

介绍了物理吸附法、化学法和生物法等去除甲醛的方法的研究概况，指出了今后的研究方向。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。