浓度测定

The quantity of trace arsenic in grain and soil was determined by hydride nondispersion atomic fluorescence method.

本文采用氢化物无色散原子荧光法测定粮食和土壤中微量砷含量。实验中选择了测试时的最佳条件，包括介质酸度、还原剂KBH_4的浓度和流速、载气流量、原子化温度等。

To determine whether there was difference of plasma ANP and/or BNP levels between physiological pacing and nonphysiological pacing with the same daily physical activity scale.

用放射免疫法测定62例起搏患者的血浆ANP、BNP浓度，其中DDD17例，VV139例，VVIR2例，VDD4例，根据特定活动量问卷调查表(specific activity scalequestionnaire)来判断起搏患者的生理活动量，选择Ⅰ级(1组)、Ⅱ级(2组)及Ⅲ级(3组)入组进行研究。

Light microscope and transmission electron microscopy showed that SMMC-7721 cells induced by SAHA had undergone the restorational alteration in morphology and ultrastructure, which were different from those of nontreated cells but were similar to those of normal cells, and the changes were as follows: the cells turned to be flat and spread; the nucleo-cytoplasmic ratio lessened and nuclear shape became rather regular; the number of nucleolus reduced and its volume lessened; euchromatin increased while heterochromatin decreased in nucleus; in the cytoplasm, mitochondria grew in number with relatively consistent structure and well-developed mitochondria cristae; Golgi complex turned to be well-developed and typical; rough endoplasmic reticulum increased. Immunocytochemistry assay showed that the expression of AFP and PCNA were declined significantly. FCM analysis showed SAHA could arrest SMMC-7721 cells in G0/G1 phase, with an accumulation of the cells in G0/G1 phase while a decrease of cells in S phase. Semi-quantitative RT-PCR detection revealed that the expression of p21WAFl mRNA was upregulated remarkably in the cells treated with SAHA.

结果：倒置显微镜和透射电镜观察显示，经SAHA处理的细胞增殖速度显著减慢，细胞体积增大，细胞核较小，形状较为规则，核仁数量减少、体积变小，核内常染色质增多而异染色质减少，核质比例减小，细胞质内线粒体数量增多、线粒体嵴发达，高尔基体较为典型，粗糙型内质网增多，呈现出与正常上皮细胞相似的形态变化；MTT比色法测定结果显示不同浓度(2.5、5.0、7.5、10.0uM)SAHA对SMMC-7721细胞的增殖均有抑制作用，并有明显的剂量依赖和时间依赖关系；免疫细胞化学检测显示SAHA能显著降低PCNA和AFP在SMMC-7721细胞中的表达；流式细胞仪检测结果显示，SMMC-7721细胞经SAHA处理后，G0/G1期细胞明显增加，S期细胞则明显减少，细胞被阻滞于G0/G1期；RT-PCR检测结果表明，SAHA作用12h后SMMC-7721细胞中p21WAF1 mRNA的表达即有增加，24h后更为明显。

We collected the urinary samples of one adult male, three pregnant females and one oestrus female.

我们收集了一只雄性黑叶猴不同阶段、三只雌性黑叶猴妊娠期和一只雌性黑叶猴发情期的尿液，用放射免疫分析法分别测定了雄猴尿中的睾酮、雌猴尿中的雌二醇和孕酮浓度，分析了不同阶段、不同状态下各种性腺激素水平的变化，并将其与黑叶猴的繁殖行为相联系，探讨笼养状态下黑叶猴性腺激素水平与繁殖行为的关系。

Olfactometry allows to quantify the concentration of a smelling mixtureand to determine the intensity of it.

气象色谱可以用来测量一种气体混合物的浓度，并且还可以测定气味的强度。

Ostrea cucullata was exposed to waterˉsoluble fraction of0 # diesel in laboratory condition,and the DNA damage in the digestive gland and gill was measured by alkaline unwinding assay .

5mg/L、中(2mg/L)和高(5mg/L)3种浓度0#柴油水溶性成分的海水中，利用碱解旋法测定消化腺和鳃DNA损伤的程度。

The plasma, bladder and liver tissue were collected, disposed and analyzed and OXY pharmacokinetic parameters were calculated and evaluated.

收集血样、膀胱和肝脏样本，采用高效液相色谱-质谱法测定奥昔布宁浓度。

Densities of L-glycine, L-alanine and L-serine have been measured withan oscillating-tube densimeter(Anton Paar Model DMA 55)at 298.15 K inwater/DMFand water/ethanol mixtures ranging from pure water to 45% DMFby mass.

同时，本文利用DMA 55振荡管密度计测定了298.15K时甘氨酸、L-丙氨酸和L-丝氨酸在纯水及水／DMF、水／乙醇混合溶剂(浓度范围为5～45％，以10％递增)中的密度。

Caused by Peperomia tetraphylla southern blight. The disease samples showing typical symptom were collected and pathogen was isolated based on Koch's rule. The biological characteristics of the pathogen were conducted, and 5 fungicides were selected and used for controlling the disease.

方法］采集具有典型症状的病害标本，根据柯赫氏法则分离病原物，并分别测定不同的温度、湿度、pH值以及碳氮源和光照对该病菌菌丝生长和菌核萌发的影响，同时，测试5种杀菌剂在3种不同浓度下对病原菌的抑菌作用。

With 5 plants including Lindernia rotundifolia, Cryptocoryne crispatula, Hygrophila stricta, Microrium sp. and Peperomia sandersii as the tested materials and the highest eutrophic lake water from Guishui Lake in Yanqing County in Beijing City as the matrix of plant growth, 3 test groups with high, middle and low input density were set up to study the effect of input density of aquatic plants on the purifying efficiency of the eutrophic lake water.

方法］以小瓜子、缎带椒、中柳、皇冠和西瓜草5种植物为试材，以北京市延庆县妫水湖8月份富营养化程度最高的湖水为植物生长基质，设高、中、低3个投放密度试验组，研究植物投放密度对富营养化湖水的修复效率影响；通过测定水样中总磷酸盐、总氮、氨氮和硝态氮的浓度变化，确定植物修复的最佳效率。

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！