测定法

Nitrogenase activity of nitrogen-fixing bacteria was measured by acetylene reduction assay combined with gas chromatography.

运用乙炔还原法测定了固氮细菌的固氮酶活性，通过测定菌落周围产生的透明圈和混浊圈大小对磷细菌的溶磷活性进行比较，采用火焰分光光度计测定了钾细菌的解钾活性。

The main results were as following:The content of the total alkaloids in Sophora alopecuroides L is analyzed by the acid dye colorimetry method and the result is 8.21%.

用酸性染料比色法测定对苦豆子样品中总生物碱的含量进行了测定，测定结果为苦豆子样品中总生物碱含量为8.21%。

These methods include a photocatalytic degradation of methyl orange solution-spectrophotometric method to measure the degradation rate of organic matter by self-cleaning glass, a UV-Vis spectrophotometric scanning procedure to measure the transmittance and a hydrophility measuring method by using a contact angle meter.

详细研究了用以表征自洁净玻璃主要性能的各种测定方法：采用紫外光辐照降解甲基橙－分光光度法测定自洁净玻璃对有机物的降解效率即光催化活性；利用紫外可见光分光光度计扫描测量其透过率光谱曲线；用接触角测定仪测量其样品表面的亲水性。

Solubility of barium chloride and barium oxide in hydrochloric acid, ethanol,acetone,ether and hydrochloric acid- ethanol,hydrochloric acid- acetone,hydrochlo- ric acid- ether has beeen studied and the separation of Ba O from Ba Cl\- 2 with hydrochloric acidethanol as the solvent has been proposed.

研究了氯化钡和氧化钡在盐酸、乙醇、丙酮、乙醚及盐酸-乙醇、盐酸-丙酮、盐酸-乙醚中的溶解性，提出以盐酸-乙醇为溶剂进行两者的分离。以 DBC- CPA为显色剂分光光度法测定氧化钡的含量，加料回收率为 98%～ 10 2 %，氧化钡含量为 0 。32 %时，平行测定 7次，相对标准偏差为 1。 58%。该法适于快速测定热处理盐浴中氧化钡的含量，对监控盐浴品质有指导意义

The compositions of complexes were determined as, by chemical and elemental analyses, Mn2CI2, Mn2Cl2, Cu2Cl2-2H2O, Cu(NO3)2-H2O, Cu(CH3COO)2, Zn2Cl2, Zn2(NO3)2-4H2O,ZnSO4 and Zn4(NO3)2, respectively. These complexes were characterized by IR,'H NMR and XPS. The crystal structures of these complexes were determined by single crystal X-ray diffraction techniques. The thermstability of the complexes was investigated by TG-DTG and the processes of their thermal decomposition were speculated. The constant-volume combustion energies of complexes, cU, were determined by a precision rotating bomb calorimeter at 298.15 K. Their standard enthalpies of formation, Hm, were calculated respectively. Finally, their biological activity was researched after the bactericidal activity was determined by selection of 1-2 bacteria.

通过化学分析、元素分析确定化合物分子组成分别为Mn_2Cl_2，Mn_2Cl_2，Cu_2Cl_2·2H_2O，Cu(NO_3)_2·H_2O，Cu(CH_3COO)_2，Zn_2Cl_2，Zn_2(NO_3)_2·4H_2O，ZnSO_4和Zn_4(NO_3)_2；借助IR、~1H NMR和XPS对化合物的键型特征进行了表征，运用X-射线单晶衍射分析法测定了个别化合物的晶体结构；以TG-DTG技术研究了化合物的热稳定性，阐明了它们的热分解机理；用精密转动弹热量计测定了化合物在298.15 K的恒容燃烧能，并计算了它们的标准燃烧焓和标准生成焓；选取1～2种病菌，初步测定了化合物的杀菌活性，进而研究了它们的生物活性。

In this experiment,X-ray diffraction apparatus was used forthe first time to examine and research on microdensity,crystallinity and microfibril angle.Through research on the radial variation of bamboo microdensity,this paper points out the conceptions of bamboo hull density and bamboo pulpdensity,and this provides basis for the multiple layer utilization of bamboo.Using computer image-processing technology to carry on precise examinationvolume fraction of bundle sheath,that is key factor to reveal the relationshipbetween bamboo structure and properties.For the first time using resonantvibration means to test the dynamic elastic module,the result shows very ideal.And for the first time researched on the variability of electric conductivityproperty of bamboo.

在本次实验中，首次使用X射线衍射仪对竹材的微密度、结晶度、微纤丝角进行测定和研究，深入研究了竹材微密度的径向变异规律，首次提出竹青密度和竹肉密度的概念，为竹材的径向分层利用提供依据；首次使用微机图象处理技术对竹材的组织比量，主要是纤维束比量进行了精确测定，从而为揭示竹材结构与材性关系打下基础；首次使用共振法对竹材的动态弹性模量进行测定和研究，测量结果是比较理想的；首次研究了竹材导电性的变异。

The amount of Na(superscript +), NH4(superscript +), K(superscript +), Mg(superscript 2+), Ca(superscript 2+), Zn(superscript 2+) in fruits and juice (sports water, green tea , pear juice, carrot juice and carrot and orange juice) were respectively separated and detected by non-suppressed ion chromatography. And pyridine-2, 6-dicarbexylic was used as mobile phase to separated monovalent cations and pyridine-2, 6-dicarbexylic-ethylenedi-amine-oxalic acid was used as mobile phase to separated divalent cations.

采用非抑制型离子色谱法测定了水果以及饮料（运动型饮料、绿茶、水蜜桃汁、胡萝卜汁和胡萝卜橙汁）中Na、NH4、K、Mg(上标 2+)、Ca(上标 2+)、Zn(上标 2+)的含量，其中一价阳离子以吡啶－2，6-二羧酸为淋洗液测定，二价阳离子以吡啶－2，6-二羧酸+乙二胺+草酸为淋洗液测定。

The amount of Na+, NH4+, K+, Mg2+, Ca2+, Zn2+ in fruits and juice (sports water, green tea , pear juice, carrot juice and carrot and orange juice) were respectively separated and detected by non-suppressed ion chromatography.

采用非抑制型离子色谱法测定了水果以及饮料(运动型饮料、绿茶、水蜜桃汁、胡萝卜汁和胡萝卜橙汁)中Na+、NH4+、K+、Mg2+、Ca2+、Zn2+的含量，其中一价阳离子以吡啶-2，6-二羧酸为淋洗液测定，二价阳离子以吡啶-2，6-二羧酸+乙二胺+草酸为淋洗液测定。

Results show that:(1) X-ray fluorescence spectrometer is the best method to detect total concentration of heavy metals in eco-cement.(2) Solid waste-extraction procedure for toxicity of solid waste is not suitable for cement system.(3) Long-term leaching test can be used to predict the long term leaching characteristic under certain situation.

试验结果表明：(1)荧光光谱法是最优的总量测定方法；(2)目前我国常用的浸出毒性测定方法不适用于水泥体系；(3)长期浸泡方法可用于测定特定条件下重金属的长期浸出性。

Methods MSCs were obtained from tibias by density gradient centrifugation and were tested the rate of adhesion. The configuration was observed under phase-contrast microscope consecutively and the cell growth was measured by MTT method.

测定其接种贴壁率，在倒置显微镜下连续观察细胞的形态变化，利用甲基噻唑基四唑（methyl thiazdyl tetrazolium， MTT）法测定 MSCs 生长曲线，并应用流式细胞术测定细胞表面标记物。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。