实验法

The research progresses in degradation technologies of benzene or some of its derivatives in water are reviewed.The macroscopical reaction mechanism of HNO2(NO2-)and C6H5Br in aqueous solution has been studied.Different influence factors have been discussed,including different pH condition,initial concentration,irradiation time,different anions and the optimization of experimental conditions.By using liquid chromatography,the degradation rate of bromobenzene has been qualitatively analyzed.The concentration variations of Br~and NO2- have been analyzed by using ion chromatography.

本文介绍了苯及其衍生物对水环境所造成的污染和危害，研究了365nm光照下HNO2(NO2-)与C6H5Br混合溶液的宏观反应过程，初步考察了混合体系中溴苯的降解及衰减行为，较为系统地探讨了影响溴苯降解过程的各种影响因素，包括溶液的pH值、初始浓度、光照时间、不同离子的影响以及实验条件的优化，并利用液相色谱法进行定量研究溴苯的降解率，利用离子色谱法分析检测实验过程中溴离子和亚硝酸根离子的变化。

The method makes model of small rat gastric ulcer, go alone with the home stomach of fill of colza leach fluid gives drug, observation test group and contrast the cankerous index of mucous membrane of group of small rat stomach, discuss its to advance a law to observe the home goes alone with charcoal end to protective action; of the stomach the influence that colza water steep moves to small intestine passes experiment leaving put oneself in another's position to observe its the action; of flowing to small rat small intestine flesh observes with heating up board law the home goes alone colza water.

方法制作小鼠胃溃疡模型，以家独行菜子水浸液灌胃给药，观察实验组和对照组小鼠胃黏膜的溃疡指数，探索其对胃的保护功能；以炭末推进法观察家独行菜子水浸液对小肠运动的影响并通过离体实验观察其对小鼠小肠平滑肌的功能；以热板法观察家独行菜子水浸液对实验动物的镇痛功能。

The antifungal activities of these materials were investigated and build foundation to develop low poison plant antifungal products. In experiment, polyphenols were extracted by reflux ectraction method which applyed petroleum ether to degrease and methyl alcohol solvent. Phenolic hydroxyl were examined and inspected by colour-developing reaction and the content of total polyphenols was determined by UV-spectrophotometry. Screening test were performed to the antifungal activities of polyphenol extraction by the tube dilution method to the selected ten pathogenic fungus such as Dothiorella gregaria, Rhizoctonia solani, Phyllosticta pirina, and the minimal inhibitory concentration were measured. The column chromatography and thin layer chromatography were applyed to separate and analyse cortex extracts of Dracaena cochinchinensi Lour.

实验部分采用以石油醚脱脂，甲醇为溶剂的回流提取法来提取植物多酚，用显色反应检识酚羟基；采用紫外分光光度法对多酚粗体物进行总多酚含量的测定；选取了聚生小穴壳菌、立枯丝核菌、梨叶点霉等10株常见农林业致病真菌，采用试管液基稀释法对多酚粗提取物进行了抗真菌活性筛选试验，并测定其最低抑菌浓度；采用柱层析法和薄层层析法对其中抑菌效果较好的龙血竭进行分离分析，根据其中3种化合物的光谱数据UV、IR、~(13C-NMR、1H-NMR和MS鉴定其结构。

In order to meet the analysis requirement, this article has introduced the main technological method and concrete application of the independently developed isotope X fluorogenic analysis instrument. The practical application effect indicated this analyzer when carries on the on-line survey to industry coating and automobile coating thickness its measuring accuracy may reach 2%~4%.

众所周知，产品和金属元件表面镀层或防腐层厚度是与产品质量与性能相关的重要指标，为满足分析要求，采用自行研制的同位素X射线荧光分析仪，对工艺铁基镀锌、铁基镀镉和汽车涂层3类样品以美国NBS系列标准为参照，采用发射法和吸收法进行了应用实验，并对在线镀锌板生产线进行了实验。

This experiment take one-day-old chickens as the object of study, we apply cell raise technologyand MTT method, the indirect enzyme-lined immunosorbent assay, the immunity enzymehistochemistry methods andα-naphthyl acetate esterase etc..

本实验以1日龄雏鸡为研究对象，应用细胞培养技术和MTT法、间接酶联免疫吸附实验、免疫酶组织化学和组织酸性α-醋酸萘酯酶染色法等方法。

In solid phase process, the polyiodides, which include triiodide, pentaiodide, heptaiodide, nonaiodide and undecaiodide tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide and tetramethyl ammonium iodide poly-compounds, were synthesized by the low-heat solid phase reaction between iodine and tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide or tetramethyl ammonium iodide; In complexation process, solution polyiodides were synthesized by complexing action of different agents; In resinifying process, triiodide, pentaiodide, heptaiodide resinic polyiodides were synthesized by ion-exchange when the strong basicity styrene anion exchange resin, potassium iodide and iodine were used as raw materials.

固相法是用正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵分别与碘作用，通过低热固相反应，合成出碘三、碘五、碘七、碘九和碘十一形式的正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵的系列高聚碘化合物；在络合法合成溶液高聚碘的实验中，选用几种络合剂通过络合作用首次合成了溶液高聚碘；树脂法合成高聚碘的实验是采用强碱性苯乙烯系阴离子交换树脂、碘化钾和碘为原料，通过离子交换，合成了碘三、碘五和碘七形式的树脂高聚碘。

It is proved that Newton iteration method is still quadratically convergent under a weak condition, and a new point is added to Newton s method , i.

本文讨论求解非线性方程的牛顿法，证明牛顿法在一个弱条件下仍保持局部二阶收敛性，给出牛顿法的一点改进，即一个不带导数的单参数的二阶收敛的迭代法，而且分别得到这两种迭代法的收敛因子，最后进行数值实验

We explore the relation between structure and activity , structure and toxicity from electronic structure and three—dimensional conformation in order to provide theoretical foundations for predicting the activity and toxicity of these chemical compounds, researching into mechanism of action and choosing safener.

通过比较四种均三氮苯类除草剂的红外光谱特征吸收的实验值和计算值，并运用规范不变原子轨道法GIAO法在RHF/6-31G水平上计算出西玛津的δ~1H-NMR和δ~(13)C-NMR，与实验值的对比统计分析，结果表明：用RHF/6-31G优化的分子构型最佳，AM1法次之，考虑到优化时间和研究的需要，我们在研究均三氮苯类除草剂分子的结构与活性关系时，为了进行深入、精确的理论研究，采用从头算RHF/6-31G进行优化；而对于此类化合物的结构与毒性的关系研究时，更注重分子的量子化学参数的相对值而非绝对值，因而采用AM1的方法。

The methods for acetic acid bacteria preservation,including slant pre servation,liquid wax preservation and liquid preservation,were compared with t he modified slant-suspension preservation experiments on preservation duration and acid yield were also studied in this paper.

对醋酸菌保藏的斜面保藏法、液体石蜡保藏法、液体保藏法和经过改进的斜面液体保藏法进行了比较，并进行了保藏期限和产酸能力的实验，结果表明：斜面液体保藏法保藏的菌种保藏期限可达2年，产酸能力优于其它3种方法。

objective in order to exploit the natural resources of chinese herbs,the inhibitive effects of the compositions of28chinese herbs on the growth of8common bacteria in oral cavity were determined.methods sen-sitive test of these bacteria were carried out by mtt method.at the same time,chessboard dilution method was used for combined sensitive test.results the compositions of28chinese herbs can inhibit the growth of5bacteria in dif-ferent levels,but the effects on other3bacteria are not obvious.quercetin and usnic acid have better effects on5bacteria than other26herbs compositions,with mic0.03125～0.125mg/ml and0.0156～0.0625mg/ml.conclu-sion quercetin and usnic acid can inhibit the5bacteria growth more effectively than other26herbs compositions.

目的 测试28种中药有效成分抑制8种口腔常见致病菌的作用，为抗菌中药有效成分用于口腔感染性疾病的防治做一些探讨。方法选择28种有抗菌作用的中药的有效成分，采用噻唑蓝法对8种口腔常见致病菌作药物敏感实验，同时采用液体棋盘稀释法进行联合药敏实验。结果 28种中药有效成分对3种牙周细菌抑制作用不明显，对另5种口腔常见细菌有一定的抑制作用，其中松萝酸和槲皮素有较强的抑菌作用，mic值分别在0.0156～0.0625mg/ml和0.3125～0.125mg/ml之间。结论所选28种中药成份中，松萝酸和槲皮素具有较强的抑菌作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。