浓度测定

The method for determination of sorbicacid ,sourcess of uncertainty of measurement such as concentration of standard solution,parameters of standard curve,and soy sample dilution were analysed.

按照GB/T5009.29-2003中山梨酸含量测定方法，对测量结果的不确定度来源如标准溶液浓度、校准曲线参数、样品稀释等进行了分析，对各不确定度分量进行了评定和量化。

Using different concentrations of PEG solution simulated drought stress, measured PB86, PR107, RRIM600 and GT1 rubber tree seedling leaves relative water content, the relative conductivity, malondialdehyde, soluble sugar content, superoxide dismutase, 8 physiological indicators, and their changes in the law, and using principal component analysis, membership function analysis, correlation analysis grey mathematical statistical methods, such as the evaluation of four strains of rubber tree seedlings and with the drought resistance the relevance of indicators; at the same time analysing the use of hypertonic solution screening rubber tree seeds and the drought resistance of different rootstocks on 7-33-97 budding seedlings of the impact of drought that rubber tree planting material and rootstocks drought assessment, and provide a theoretical basis choice.

利用不同浓度的PEG溶液模拟干旱胁迫，测定了PB86、PR107、RRIM600和GT1橡胶树实生苗叶片相对含水量、相对电导率、丙二醛、可溶性糖含量、超氧化物歧化酶等8项生理指标，研究了它们的变化规律，并利用主成分分析、隶属函数分析、灰色关联分析等数理统计方法评价了4个品系橡胶树实生苗的抗旱性及其与各指标的相关性；同时分析了利用高渗溶液筛选的橡胶树种子的抗旱性以及不同砧木对热研7－33－97芽接苗抗旱性的影响，以为橡胶树抗旱砧木和种植材料的评价、选择提供理论依据。

Objective: To establish the determination of copper ions by using spectrophotometric method.

目的：建立污染水中铜离子浓度分光光度法测定方法。

Surface tensions and interfacial tensions were measured by the method of stationary rings, and the critical micelle concentrations were measured by the methods of conductance and surface tension.

运用红外光谱和核磁共振等手段对所得表面活性剂的结构进行了表征，并对其表面张力、界面张力及其临界胶束浓度等性能进行了定量测定；结果表明，所得阳离子型含氟表面活性剂具有极低的表面张力：17.8、22.9、23.8、21.5、25。

Serum levels of ADMA and its stereoisomer, symmetrical dimethylarginine, were determined using high-performance liquid chromatography.

使用高效液相色谱法测定ADMA及其立体异构体对称二甲基精氨酸的血清浓度。

After spraying 3 kinds of growth regulators PBO,PP333 and GA_3 after full bloom,the concentration of which was 50 mg/L,the content of soluble sugar,titratable acid,soluble solid substance,vitamin C,and flesh hardness,fruit shape index,stone cell content were analyzed,and the content of IAA,GA_3,ZR and ABA in young fruit was determined by means of ELISA method to probe the dynamic change of the endogenous hormones during the fruit development.

在此基础上，于盛花期喷施浓度均为50 mg/L的生长调节剂PBO、PP333、GA_3，对各处理果实可溶性糖、可滴定酸、可溶性固形物含量及果肉硬度、果形指数和果实石细胞含量进行分析；采用酶联免疫吸附法测定了幼果生长发育过程中IAA、GA_3、ZR和ABA含量的动态变化。

This method can be used to quantitatively analyze monosaccharides in the dilute acid hydrolysate of corn stover fast and accurately, which provides an effective way for the research of hydrolysis technology.

该方法可快速、准确测定秸秆稀酸水解液中单糖的浓度，为水解工艺的研究提供一种有效的分析方法。

Methods］ MTT assay was employed to test the lethal concentration 50 (IC50) of sensitive germline (SK-OV-3) and ovarian cancer cell subline induced by ADR (SK-OV-3/adr) treated by 4 drugs, resistance index and reverse multiple were calculated. The changes of drug content were observed by fluorescence microscope, the intracellular accumulation of ADR was evaluated by fluorospectrophotometry, the changes of mdr 1/P-gp resistance were observed respectively by RT-PCR and Western blot.

方法］MTT法检测药物对敏感细胞株（SK-OV-3）和诱导的耐药细胞株（SK-OV-3/adr）的半数致死浓度（IC50），计算耐药指数和加逆转剂后的逆转倍数，荧光显微镜观察不同时间细胞内的药物含量变化，荧光分光光度法测定细胞内ADR的含量，RT-PCR和Western blot法检测细胞耐药前后mdr1/P-gp的变化。

Body mass index, percent normal body weight, triceps skin-fold thickness, subscapular skin-fold thickness, mid-upper arm circumference, serum albumin and total lymphocytes count were determined in 31 patients with COPD and in 11 healthy controls.

测定31例COPD患者（分为营养不良组12例，非营养不良组19例）及11名正常人的血清瘦素、TNF-α浓度、体重指数、理想体重百分比、三头肌皮皱厚度、肩胛下皮皱厚度、上臂中部臂围，血清白蛋白、总淋巴细胞计数等指标。

To estimate the practicability and substitution of using MD method tosupervise dermal drug concentration comparing with the traditional method of tissuepaste.

以往的研究受研究方法和分析设备所限，很难准确测定局部用药后的皮内药物浓度。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！