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This paper set up a new method of SeC determination by differential pulse voltammetry at the / GC electrode.

依据SeC的还原峰电流与其浓度成线性递增关系，在充分探讨多种影响因素的基础上建立了／GC电极上微分脉沖伏安法测定SeC含量的新方法，其线性范围为5.0×10~(-8)～7.0×10~(-4) mol·L~(-1)，检出限为3×10~(-8) mol·L~(-1)。

It was found that the PCCG of the derivative could be 31.32% when 3 g starch and 3 g maleic acid were initiated by both 0.009 85 mol/L Fe2+ and 4.412 mol/L H2O2 and copolymerized at 60 ℃ for 5 h.

将中性的淀粉转化为含羧基的阴离子型聚电解质，是赋予淀粉功能性而提升其价值的一种有效途径。

MgO-C brick has a good erosion resistance but Al〓O〓-C brick is better. Corrosion mechanism for refractory without carbon is that FeO and oxides of molten slag take place chemical reaction with constituents of refractory and forming low fusing point compounds to be dissolved in molten slag. For those refractory containing graphite carbon is to be decarburized in advance and to form decarburizing layer and metamorphosis layer. The subsequent corrosion is decarburizing and taking chemical reaction to form low fusing point compounds and dissolved in molten slag at the same time.

铁浴中硅和钛的扩散是影响铁浴及熔渣与耐火材料作用的重要因素，耐火材料中添加的TiO〓和SiC受熔渣氧化和侵蚀，将被部分还原形成Si，Ti向铁浴中扩散，Si、Ti在铁浴中的扩散研究结果是： D〓=1.84×10〓exp（－5988.7/T） cm〓/S E〓=49766 J/mol D〓=7.76×10〓exp（－53225.5/T） cm〓/S E〓=442304 J/mol 铁浴式熔融还原熔体对粘土砖，高铝砖，镁砖的侵蚀速度很高，镁碳砖抗侵蚀能力比前几种耐火材料强，但不如铝碳砖；对不含碳耐火材料在熔体中的侵蚀是熔渣中FeO及其它氧化物与耐火材料组分的化学反应形成低熔点物熔蚀进入渣相，产生损毁。

After Alcalase hydrolysis both peptide fractions were desalted by adsorption on a macroporous resin and then eluted with ethanol at different concentrations.

这两种组分经Sephadex G-15分离时，0.01 mol/L的HCl溶液作为洗脱液对降胆固醇肽的分离有较好的效果；1 mol/L的醋酸溶液作为洗脱液对降血压肽的分离有较好的效果。

Decoction was percolated with 9-fold volume of 70% ethanol at the velocity of 3 mL/min and the optimal isolation technology was that the pH of curcumin sample solution was regulated to 7 by 0.01 mol/L HCl and 0.01 mol/L NaOH solution and 80% ethanol was used for elution of the velocity of 4 mL/min.

结果：提取姜黄素用9倍体积的70%乙醇，以3 mL/min的速度渗漉为最佳提取工艺；利用D101大孔树脂纯化姜黄素工序中调节上样料液pH为7，用80%乙醇以4 mL/min的速率洗脱为最佳分离工艺。

The culture was treated with lutein of different concentrations 10^(-8mol/L、10^(-7)mol/L、10^(-6)mol/L, respectively. The culture cells were fixed and were stained for tartate-resistant acidic phosphatase after 7d. The formation of osteoclasts was quantified by counting the number of TRAP(superscript +) multinuclear cells. The percentage of bone resorbed surface, TRAP activity and the expression of receptor activator of NF-KB mRNA were analysed. The appearance of reduced mice osteoclasts was typical.

受试细胞分为对照组、叶黄素低剂量组10^(-8mol/L、叶黄素中剂量组10^(-7mol/L和叶黄素高剂量组10^(-6mol/L，并设立空白对照组。7 d后取细胞玻片进行抗酒石酸酸性磷酸酶染色，观察破骨细胞并计数；取骨片进行甲苯胺蓝染色，光镜下统计骨吸收陷窝面积；测量抗酒石酸酸性磷酸酶活性以及破骨细胞表面NF-κB活化受体mRNA表达量。

Results In slices superfused by intralipid, 3μmol/L propofol, 0.1μmol/L corticosterone LTP was induced by HFS (PS 40min after HFS: 1.436±0.160, 1.332±0.077, 1.385±0.095, P.01 or P.05 vs control).

结果：Intra组实施HFS后PS升高，HFS后40min时的PS为1.436±0.160，显著高于实施高频刺激前(P.01)。

In pacemaker cells of SA node superfused with the oxygenated K—H solution, MDP, APA, V〓, VDD, RPF and APD〓 were—45±5mv, 48±4mv, 2. 4±0.9v/s, 89±8 mv/s, 200±11bpm and 206±15ms, respectively. Anoxia (perfused for 20min with a modified K—H solution gassed with 100% N〓 and deprived of glucose) increased MDP, APA and V〓, and decreased VDD and RPF in a timedependent manner. At anoxia for 20min, the above parameters were—58±5mv, 64±5mv, 11. 7±2. 7v/s, 24±7mv/s, 92±11bpm and 179± 14ms, respectively. ADase (10U/L).

环戊腺苷和苯基异丙基腺苷不仅能增加豚鼠窦房结起搏细胞APA、MDP和〓，且能减小VDD、RPF和〓在环戊腺苷20nmol／L浓度时，MDA、APA和〓分别增值5.4±0.7mv、7.6±0.9mv和2.4±0.5v／s，VDD、RPF和〓分别降低32±4mv／s、68±9bpm和31±12ms（p.05或0.01）。0.1μmol／L 8—苯茶碱和10μmol／L格列苯脲能明显地抑制环戊腺苷的电生理效应。

The mobile phase was 0.1 mol/L ammonium oxalate + N,N-dimethylformamide + 0.2 mol/L diammonium phosphate (75+15+10, by vol) adjusted to pH 8 by aqueous ammonia. Column temperature was 30℃, flow rate was 0.8 ml/min, and detection wavelength was 365 nm.

使用C18反相柱和二极管阵列检测器，以0.1mol/L草酸铵溶液+二甲基甲酰胺+0.2mol/L磷酸氢二铵溶液=75+15+10(用氨水调pH值至8.0左右)为流动相，柱温30℃，流速0.8ml/min，检测波长365nm，外标法对水合霉素的有效成分进行定量分析。

The maize and bean in pot were irrigated by the tap water and the solutions with 0.1 mol/L Pb (NO3)2 and 0.1 mol/L CdSO4 resp.. The contents of Pb and Cd in soil before and after the maize and bean were planted and in different parts of maize and bean were determined.

方法］分别用自来水、0.1mol/L的Pb(NO3)2和0.1mol/L的CdSO4溶液浇灌盆栽玉米和大豆，测定栽培前后土壤中铅、镉的含量，以及玉米和大豆各部位铅、镉的含量。

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。