浓度测定

The transmission spectrum and the absorption spectrum of alcohol shows that the characteristic absorption peak shifts with alcoholicity due to the molecular configuration. A multiple regression model was established based on the position, the intensity and the shape of the characteristic absorption peak, and used to detect alcoholicity. The predictive results show a linear relationship between predicted values and real values in sonic range, and can be used as a means to detect the alcoholicity.

通过对酒精透射光谱和吸收光谱的研究发现，其特征吸收峰随浓度不同发生漂移，从分子结构能级角度对其做了定性解释；根据部分稳定的特征吸收峰处不同波长点的吸光度，利用最小二乘法建立了多元线性回归模型，运用此模型实现了根据特征吸收峰波长的位置、强度、形状来预测酒精浓度，测定数据与样品浓度之间在一定范围呈良好的线性关系。

Results: The imprecision of six diluent concentrations in duplicate was 2.68%, the best fit model was the cubic equation. The deviaton from linearity of the first concentration was 42.3%, exceeding the 5% clinical allowable error. DLs of the other concentratons were within limit.

结果：六个稀释浓度样本重复测定的不精密度为2.68%，三次多项式为最适拟合模型，第一个稀释浓度的非线性程度达到42.3%，超过5%的允许范围，为临床不可接受，其它五个稀释浓度的线性偏离均在允许范围内。

A method for AAS determination of Palladium in Aluminum oxide matrixs by microwave digestion was reported in this paper.

报道了微波消解- AAS 法测定氧化铝为载体的钯催化剂中钯的新方法，试验了微波消解溶样条件(溶解试剂、压力、时间和功率等)，研究了测定介质的影响，通过在样品测定液中加入铝基体至铝浓度为4 mg/mL，消除了铝对钯测定的干扰。

Measuring the coefficient of dynamic viscosity of 0-60g/l salt water under 10-30℃ by capillary tube viscosimeter, and performing the mathematical regression of coefficient of dynamic viscosity about temperature and concentration in order to realize the influence of temperature and concentration on dynamic viscosity of salt water.

2为了解温度和浓度对咸水粘滞系数的影响，使用品氏毛细管粘度计测定10—30℃下，浓度在0—60g/l之间的咸水的粘滞系数，并对咸水粘滞系数进行了浓度和温度的数学回归

ADPODS posses stable Surface chemical properties when dissolved in 10% sulfuric acid, 10% sodium hydroxide or 10% sodium chloride aqueous solutions. ADPODS s emulsifiability and detergency at 650mg/L water hardness are very good.4 The micellar aggregation number of C16-MADS was determined by molecule fluorescence probe method.

采用分子荧光探针法测定了C_(12)-MADS与C_(16)-MADS的胶团聚集数，在一定的表面活性剂溶液浓度1.25×10~(-2～1.10×10~(-1)mol·L~(-1)范围内，N_m随浓度的增大而线性增大；体系温度和NaCl浓度对N_m的影响极小；胶团内核的微极性明显大于传统阴离子表面活性剂。

The radical scavenging activity of Laminaria japonica pigments was studied by the DPPH2,2-Diphenyl~(-1-picrylhydrazylassay. The total pigments showed a strong DPPH radical scavenging activity of 65.819% with the concentration of 0.52mg.ml~(-1). The DPPH radical scavenging activity of fucoxanthin was 19.85% with the concentration of 0.27mg.ml~(-1). The antimicrobial activity of pigment in Laminaria japonica was studied by the method of round paper. The results showed that the pigment extracts have activity against Escherichia coli, Pseudomonas aeruginosa, Saricina flava and Saccharomyes cerevisia. The antibacterial activity of total pigments for Saccharomyes cerevisia was the strongest with an inhibition diameter of 18.9 mm; and the antibacterial activity of fucoxanthin for Saricina flava was also much significant with an inhibition diameter of 10.2 mm.

测定了它们对自由基的清除率和对四种细菌的抑菌效果，研究结果表明，总色素和褐藻黄素的浓度与自由基清除率成正比，当总色素浓度为0.52mg.ml~(-1)时，清除率达到65.819%，高于陆生植物黑米色素和紫甘薯色素；当褐藻黄素浓度为0.27mg.ml~(-1)时，自由基清除率达到19.85%，低于紫苏色素、紫甘蓝色素、黑米色素、紫甘薯色素；对大肠杆菌、绿脓杆菌、八叠球菌、金黄葡萄球菌的抑菌实验结果显示，海带总色素对金黄葡萄球菌的抑菌活性最强，抑菌圈直径为18.9mm；褐藻黄素对八叠球菌的抑菌活性相对较强，抑菌圈直径为10.2mm。

The effect of high-concentration bromide ion in industrial wastewater on COD determination was studied.

研究了工业废水中高浓度溴离子对COD测定的干扰，考察了有机物浓度、溴离子浓度与表观COD值之间的关系，并初步探索了隐蔽溴离子的方法。

Methods SH-SY5Y cells, a human neuroblastoma cell line, were incubated with different concentrations of fluoride for 48 hr and somle of them were treated with vitamin E precedently. The functional situation of cells was measured by MTT method; lipid peroxidation was detected by High-Performance Liquid Chromatography; phospholipid was separated by a Silica SepPak cartridge and neutral lipids by HPLC.

体外培养SH-SY5Y人脑神经母细胞瘤细胞，在培养液中加入不同浓度的氟化物或加入抗氧化剂，培养48h后用测定细胞MTT的方法来了解细胞的损伤程度，用高效液相色谱法分离和测定培养液中脂质过氧化物水平，用过柱和比色法测定细胞生物膜磷脂含量，用高效液相色谱法测定细胞生物膜辅酶Q和胆固醇含量。

The optimal boron concentration for growth of pea (Pisum sativum L.) andcucumber (Cucumis Sativus L.) plants was screened by designing a series of boronconcentration in nutrient solution and the influeuce of boron deficiency or toxicityon integrity of cell membrane in different organs of the two plants was studied bymeasuring pH of the nutrient solution,〓 concentration and conductance in rootexudate solution and extracting solution of different organs from the two plants.

用不同浓度硼的营养液培养豌豆、黄瓜植株，筛选和确定在温室条件下生长所需的最适硼浓度和硼毒害浓度；进而通过对缺硼、对照和硼毒害处理后营养液pH变化，根分泌物和不同组织浸提液中K+浓度和电导率的测定，研究了缺硼和硼毒害对两种植物不同组织细胞膜完整性的影响。

Biles from an animal model of incomplete stenosis of common bile duct in guinea pigs and from patients with and without gallstone were examined for the total protein concentration, protein fractionations by SDS-PAGE electrophoresis, endogenous and exogenous .beta.-glucuronidase activity, bilirubin fractionations by HPLC, ionized calcium activity, pH, cholesterol and bile salts concentrations.

我们利用天竺鼠总胆管不完全结扎的动物模式之胆汁与患有胆结石病人之胆汁，进行下列测定：总蛋白质浓度、SDS-PAGE蛋白质电泳分析、内源性与外源性葡萄糖醛酸酵素活性、胆红素高效能液态层析仪分型浓度、游离钙活性、pH值、胆固醇浓度与胆汁酸浓度。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。