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Bidentis were studied by adopting indoor bioassay. The results showed that the volatile matter of F. bidentis had not allelopathy to four receptor plants. The eluviated matter inhibited seedling growth of cotton obviously, the inhibition ratio of root and stem were 6.29% and 10.42% respectively. The aqueous extract of litterfall and root exudates had different inhibition to four receptor plants, The synthesis effectof all treatments was significantly greater than eluviated matter treatment except for B3 of the aqueous extract of root exudates, such as the synthesis effect of all treatments (A1, A2, A3, B1, B2, B3 and eluviation) were 44.74, 29.37, 14.5, 31.54, 16.52, 3.55, 1.48 respectively.

结果显示：黄顶菊自然挥发物对受体植物不表现化感作用；黄顶菊淋溶物对棉花幼苗生长表现出明显的抑制作用，对棉花幼苗高度和根长的抑制率分别为6.29%和10.42%；黄顶菊枯落物浸提液和根系分泌物浸提液对4种受体植物均表现出不同程度的抑制作用，除了黄顶菊根系分泌物浸提液 B3处理外，其它处理的综合效应均显著大于淋溶物处理，如黄顶菊枯落物浸提液（ A1、 A2、 A3）、根系分泌物浸提液（ B1、 B2、 B3）以及淋溶物等各处理对受体植物的综合效应分别为44.74、29.37、14.5、31.54、16.52、3.55、1.48。

The second phase quartz veins contain only twophase aqueous and single phase aqueous fluid inclusions; fluids came from meteoric water which interfused with magmatic water.

中期石英脉中主要发育气液两相包裹体和少量单液相包裹体，流体主要来源于大气降水，并且有少量岩浆热液混入。

In this thesis ,AgBr hydrosol was prepared by NaBr (aqueous solution of certain concentration) titrating AgNO3 (aqueous solution of certain concentration) and AgNO3 titrating NaBr. The effect factors to AgBr hydrosol were discussed and analysed.

本文用一定浓度的AgNO_3滴定NaBr，和用一定浓度的NaBr滴定AgNO_3制备了AgBr水溶胶，并对制备水溶胶的各个因素进行了讨论和分析。

Said metal nitride is prepared through mixing the aqueous soltuion of nitrate or sulfate of A with the aqueous soltuion of Cr, Mo or W acid or one of their ammonium salts, coprecipitation or impregnation to obtain load-type or non-load-type dual-component metal salt or compound oxide, then pass in NH3, sequentially heating and azotizing at 600-750 deg.C.

该金属氮化物是由含A过渡金属元素的硝酸盐或硫酸盐水溶液与Cr、Mo或W酸或者Cr、Mo或W酸铵水溶液混合，通过共沉淀法或浸渍法制成负载型或非负载型双组元金属盐或复合氧化物，再将双组元金属盐或复合氧化物通NH3进行程序升温，至最终氮化温度600～750℃下进行反应而制得。

On this basis, chosing 15w germicidal lamp with radiation centred at 253. 7nm or 15w blacklight fluorescent lamp with radiation centred at 365nm as the light source respectively, the destruction effects of trace impurities in water by photocatalytic oxidation method using TiO〓 as an immobile phase have been investigated, and the effects are contrasted with photolysis. The investigation is mounted into Phenol aqueous solution, Hydroquinone and Humic Acid aqueous solutions、three representative halohydrocarbons coexisting in main water、the comprehensive index removal of varied trace organic pollutants in main water、the removal of residual chlorine and the disinfecting action, etc..

在此基础上，选择主波长253.7nm的紫外线杀茵灯或主波长365nm的蓝黑管紫外线荧光灯作为光源，研究了TiO〓膜固定相光催化氧化法去除水中微污染物的效果，包括苯酚水溶液、对苯二酚水溶液和腐植酸水溶液的光催化氧化以及自来水中共存的三种典型的氯代烃水溶液三氯甲烷、四氯化碳和四氯乙烯的混合光催化氧化、自来水中有机物总体去除效果以及光催化去除自来水中余氯的作用和光催化的消毒作用等，并进行了光解对比实验。

In this paper,recent researches and developments on atom transfer radical polymerization in aqueous media have been introduced from the aspect of homogeneous aqueous system and various hete.

文中从均相水溶液体系以及悬浮、乳液、微乳液等非均相水溶液体系，分别介绍了近年来水介质中ATRP的研究进展，并对其发展方向进行了展望。

Lipases have catalytic active in both aqueous phase and the non-aqueous phase and have a wide range of application in various industrial areas.

脂肪酶在水相和非水相中都具有催化活性，在众多工业领域应用前景十分广阔。

On this basis, preference conformations of tautomers were calculated by the B3LYP/6-311+G(superscript **) method, both in the gas and aqueous phases, with full geometry optimization. The Onsager solution theory model was employed for aqueous solution calculations.

采用B3LYP/6-311+G方法对处于优势构象时的各互变异构体进行了几何全优化，并计算出它们的总能量、焓、熵、吉布斯自由能。

The effect of aqueous infusion of pepper leaf on plant height, stem diameter, leaf number per plant, leaf area and the content of chlorophyll a, chlorophyll b and total chlorophyll, the activity of SOD and POD of pepper seedling all showed promotion with low concn. and inhibition with high concn. The conductivity and MDA content increased with the increment of aqueous infusion concn.

辣椒叶水浸液对辣椒幼苗的株高、茎粗、单株叶片数和叶面积、叶绿素a、叶绿素b和总叶绿素含量S、OD活性及POD活性的影响均表现为&低浓度促进、高浓度抑制&；而相对电导率和MDA含量则随着水浸液浓度的增加而增大。

In this paper,the phase diagram of the aqueous solution system of potassium chloride and ammonium sulphate is calculated,analyzed and compared with that of such aqueous solution system into which certain amount of methanol is added,and the yield of the reaction is caculated.

硫酸钾是一种优质无氯钾肥，由氯化钾与硫酸铵复分解制备硫酸钾是十分重要的生产方法之一，其反应可表示为2KCl+(NH4)2SO4=K2SO4+2NH4Cl该反应氯化钾转化成硫酸钾的转化率受到各组分在体系中的溶解度限制而较低[1，2]。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。