矿物组分对混合酯水解及生烃的催化作用

选择十六烷酸甲酯和十八烷酸甲酯组成的混合酯为模型反应物,考察低压下矿物低温催化混合酯水解及生烃的影响因素,并进行活性评价.先考察6种天然矿物和7种未熟烃源岩低温催化酯水解及生烃的作用,然后对天然矿物组分与未熟烃源岩就低温催化混合酯水解及生烃的作用进行关联,再考察不同比例复配的黏土和碳酸盐矿物的低温催化酯水解及生烃的作用.实验结果表明:未熟烃源岩低温催化混合酯水解及生烃率的趋势与6种天然矿物含量加权处理关系较好;不同比例复配的黏土矿物和碳酸盐矿物体现了不同的催化作用,在确定的实验条件下黏土矿物与碳酸盐矿物质量比为1:1时生烃效率最高.     

Relations between the underground biomass and soil organic carbon and nitrogen of the alpine meadow at the Eastern Margin of the Qinghai-Tibet Plateau

This article, by combining field investigation with laboratorial analysis, studies diverse alpine meadow at the Eastern Margin of the Qinghai-Tibet Plateau for the underground biomass dynamics, vertical distribution of the content of soil carbon and nitrogen, the connection between the biomass and the content of carbon and nitrogen. The studies show that underground biomass in the herb layer of upland meadow is more than that in the terrace meadow, while underground biomass in the upland shrubland is the most. The vertical distribution of underground biomass of each type is obvious as in shape of＂T＂. As to the distribution of the content of soil organic carbon in the three sample grounds, it showed that the deeper the soil the less the content of soil organic carbon. In May, unlike at terrace meadow, the underground biomass and the content of soil organic carbon in positive proportion, such revelation at upland meadow and upland shrubland is not apparent. In July, at upland meadow and terrace meadow the underground biomass and the content of soil total nitrogen in positive proportion, such revelation at upland shrubland is not apparent either.     

Distribution characteristics of soil organic matter and total nitrogen on the Yajiageng vertical belt,Gongga Mountain around the Dadu River banks

Distribution characteristics of soil organic matter（SOM） and total nitrogen（TN） were studied in different plant communities of the Yajiageng vertical belt in Gongga Mountain around the Dadu River banks. The results show： （1） the contents of SOM and TN of the plant communities gradually decreased with the following order： subalpine coniferous forest （3 027 m）, subalpine meadow （3 873 m）, coniferous broadleaved mixed forest（2 737 m）, subalpine shrub（3 565 m） and treeline（3 564 m）. （2） With soil profile depth increasing, the contents of SOM and TN gradually decreased. For different vegetation types, the contents of SOM and TN in sub-alpine coniferous forest were higher than that of other vegetational types. （3）The ratio of the content of carbon to the content of total nitrogen （Cc/CTN）WaS 13.5-27.6, which was relatively lower than the appropriate Cc/CTN of 25-30, and indicated that the soil in favor of the organic matter decomposed and nutrients released. Cc/CTN in the soil had no correlation with sea level altitude. However, its distribution in the soil x, aried with different vegetation types. （4） Nitrogen in SOM existed mainly in the form of organic nitrogen, and Cc/CTN in the soil was not obvious correlated with SOM and TN.     

贵州有机农业发展探讨——以花溪区为例

花溪区地处贵阳市南郊,是贵州典型的城郊农业区．本文以花溪区为例,通过分析有机农业在花溪发展的必要性和可行性,指出了贵州实行有机农业存在的问题,提出了相应的解决对策．结论表明：发展有机农业是贵州脱贫致富的必然选择．     

有机混合液体声速混合定则的研究

根据Jacobson理论及液体声速与分子自由程的关系 ,推导出有机混合液体声速与各组分声速之间满足的混合定则 ,并通过实验进行了验证。结果表明 ,实验测量结果与理论计算结果符合较好 ,最大误差为 3.4 % ,可以用来进行多元体系的声速计算。     

二维各向异性谐振子的能级简并及其对原子核形变分析

各向异性谐振子有其独特的能级简并和对称性,且在一定的近似条件下可过渡到各向同性振子。在原子核结构理论中用各向异性谐振子讨论核形变较为方便。     

试论新形势下历史教学中的爱国主义教育

千百年来,爱国主义始终是动员和鼓舞中国人民团结奋进的一面最鲜艳的大旗,是伟大中华民族共同的精神支柱。世纪之交,世界政治风云变幻,国际竞争日趋激烈。世界范围的经济竞争、综合国力竞争,实质上是科学技术的竞争和民族素质的竞争,说到底是掌握了高新科学技术的高素质人才的竞争。谁掌握了面向二十一世纪的教育,谁培养了高素质的垮世纪人才,谁就能在二十一世纪的国际竞争中处于战略主动地位,立于不败之地。人才培养德为首,学校进一步加强和改进教学中的爱国主义教育,为国家培养大批高素质的人才,显得尤为迫切和重要。本文仅结合笔者自己在历史教学实践中的体会和感想,论述一下新形势下历史教学中的爱国主义教育这一常议常新的课题。     

十二烷基苯磺酸锌色谱固定相的合成及研究

本文介绍了十二烷基苯磺酸锌色谱固定相的制备过程 ,并且对它们的柱性能进行了研究。实验表明 ,这种色谱固定相对于烷烃、芳香烃、酮、酯类及同分异构体等表现出较好的分离能力 ,该研究为有机盐固定相的实际应用作了有益的探索。     

丙氨酸-N-荒氨酸镍稀土配合物的合成及活性

报道了稀土与丙氨酸 N 荒氨酸镍 [H2 NiL2 ]多核配合物的合成和表征。通过元素分析确定了配合物的组成为RE2 (NiL2 ) 3·XH2 O(RE =La ,Nd ,Sm ,Eu ,Gd ,Tb ,Dy ,Ho ,Ey ,Yb ;X =1,4,8) ,研究了配合物的溶解性 ,红外光谱和核磁共振氢谱。进一步确证了配合物的组成 ,用所得配合物进行了活性试验 ,其体外抗癌活性及抗菌活性实验表明丙氨酸 N 荒氨酸镍和它的稀土多核配合物具有较好的活性。     

DCJTB掺杂Alq体系的发光特性研究

研究了以ＤＣＪＴＢ掺杂Ａｌｑ作为发光层的红色电致发光器件的发光特性,通过分析Ａｌｑ与Ａｌｑ：ＤＣＪＴＢ的激发光谱与发光光谱,得出了存在着从Ａｌｑ到ＤＣＪＴＢ的能量传递。同时给出并分析了不同ＤＣＪＴＢ掺杂浓度对器件发光特性的影响。