MD膜驱剂对油藏矿物ζ电位的影响

用微电泳法考察了3种季铵盐(MD膜驱剂、四乙基溴化铵((Et)4NB)、十六烷基三甲基溴化铵(CTAB))和无机盐对石英砂和大庆油砂界面电性的影响.结果表明,3种季铵盐对石英砂ζ电位影响的顺序为:CTAB>MD膜驱剂>(Et)4NB.无机盐使石英砂在MD膜驱剂溶液中的ζ电位升高,无机盐中的Al3+离子影响比Ca2+和Na+离子明显.大庆油砂在MD膜驱剂和(Et)4NB溶液中的ζ电位较沥青质-大庆油砂的低,而大庆油砂在吸附沥青质前后在CTAB溶液中的ζ电位变化很小.理论计算表明,沥青质-大庆油砂饱和吸附季铵盐的ζ电位大于大庆油砂,季铵盐在沥青质-大庆油砂表面的相对覆盖率小于大庆油砂.     

Electrolytic reduction of mixed solid oxides in molten salts for energy efficient production of the TiNi alloy

Fast and energy efficient technologies for material production are essential for the sustainable develop- ment of human society. The TiNi alloy is an important intelligent material[1], having high abrasive resistance, superior elasticity and good shape me…     

薄层扫描法测定酯型儿茶素的含量

目的研究不同种类盐类盐析和不同温度水平对茶多酚粗品中酯型儿茶素含量的影响。方法采用盐析的方法对茶多酚粗品液进行处理，薄层色谱扫描仪进行酯型儿茶素含量的测定。结果在较低的盐浓度下，适当增加盐的浓度（≤5％，质量分数）有利于酯型儿茶素含量的提高，降低茶多酚粗品溶液的温度（40℃）也有利于酯型儿茶素含量的提高。结论采用薄层色谱扫描的方法测定酯型儿茶素的含量具有较高的测量精度。     

293K时稀土氯化盐LaCl_3水溶液热力学性质的研究

在293K时测定了稀土氯化盐LaCl3在水溶剂中的电导率,利用公式计算了LaCl3的摩尔电导率,应用Kohlraush经验规则,外推得到293K时LaCl3水溶液的无限稀释摩尔电导率,应用电导法测定和计算了293K时LaCl3水溶液的平均活度系数,讨论了在指定温度时浓度对LaCl3水溶液的电导率、摩尔电导率和活度系数的影响.     

融盐包裹法合成球形正极材料LiNi0．7Co0．2Al0．1O2

以球形Ni（OH）2为核心原料，Al（NO3）3·9HzO、Co（NO3）2·6H2O和LiNO3为包裹原料，采用融盐包裹法在空气中煅烧合成了单相固溶体LiNi0.7Co0.2Al0.1O2。用XRD研究了合成产物的物相和结构，用SEM研究了合成产物的形貌，用电池性能测试仪研究了合成产物的电化学性能。实验结果表明，合成产物具有α-NaFeO2型层状有序结构、球状形貌和良好的电化学性能。     

观察电极反应的优化实验

用简便经济的电极材料和盐桥,认真筛选半电池,找到现象鲜明、易于观测半反应发生及盐桥上离子迁移的原电池.     

Over-expression of an Arabi-dopsisd δ-OAT gene enhances salt and drought tolerance in transgenic rice

δ-OAT, ornithine-δ-aminotransferase, is the key enzyme involved in proline biosynthesis. In this study the Arabidopsis δ-OAT gene was transferred into rice (Oryza sativa L. ssp japonica cv. Zhongzuo 321), whose successful integration was demonstrated by PCR and Southern blot analysis. The over-expression of the gene in transgenic rice was also confirmed. Biochemical analysis showed that, under salt or drought stress conditions, proline contents in the leaves and roots in transgenic rice plants were 5- to 15-fold of those in non-transgenic controls. Under stress conditions, germinating rate of transgenic lines is higher than that of controls. Although the growth of rice plants tested were more and more retarded with the increasing of NaCI concentration, the transgenic plants grow faster compared to the controls under the same stress condition. Meanwhile, the resistance to KCl and MgSO4 stresses was also found enhanced in transgenie rice. Furthermore, the over-expression of δ-OAT also improved the yield of transgenic plants under stress conditions. The average yield per plant of transgenic lines increases about 12%--41% more than that of control line sunder 0.1 mol/L NaCI stress. These data indicated that the over-expression of δ-OAT, with the accumulation of proline, resulted in the enhancement of salt and drought tolerance and an increase of rice yield, which is of significance in agriculture.     

光引发阳离子聚合反应的研究——Ⅰ.鎓盐光引发剂的合成引发活性及活性中心浓度

合成了7种具有不同阳离子结构和不同配阴离子的芳基碘、硫(钅翁)盐,并测定了它们的光谱特征。其中以双[4-(二苯锍基)苯基]硫(钅翁)盐(BDS)在甲基丙烯酸缩水甘油酯光聚合中的引发活性最高。用苯酚钠终止氧化环已烯光聚合中的活性中心,从而测得活性中心浓度,发现至少在低转化率(10％)以内,活性中心浓度随聚合时间而线性增加;在相同转化率时,溶液聚合的活性中心浓度高于本体聚合者,表明溶剂可能参与引发作用。     

小麦幼苗对盐渍胁迫的生理反应研究

本文选取了两个小麦品种(商丘碱麦和济源728)在人工气候室液体培养条件下,对盐渍胁迫下的几个不同生理反应进行了研究。两品种地上部器官生长量均随盐(NaCl:Na_2SO_4,7:3,w/w)浓度增加而降低。商丘碱麦的地上部生长量受盐渍胁迫影响较小,它的抗盐性较强:济源728品种地上部生长量受盐渍胁迫影响较大,它的抗盐性较弱。经盐溶液处理后,两个品种的水势和吸水率均显著降低。品种之间表现出一定差异,商丘碱麦水势低于济源728,吸水力大于济源728。叶细胞膜透性随盐浓度和处理时间而加大。抗盐性较弱的济源728透性大于商丘碱麦,细胞膜破坏程度较大。