高温超导体母体相CaCuO_2无限层结构的高压同步辐射结构研究

采用金刚石压砧高压装置(DAC),对高压合成的高温超导体母体相CaCuO2无限层结构的多晶粉末样品,进行了高压能散X射线衍射实验,实验结果首次表明,在0-30 GPa压力范围内,无限层结构的CaCuO2的晶体结构保持稳定,没有发生相变;根据压力和体积压缩率数据,用Birch-Murnaghan状态方程拟合,得到压力导数B0’=4时,零压体弹模量B0=181.4±9.4 GPa.

铜系甲醇催化剂母体物相研究

研制了一种新型甲醇催化剂。它由分解类孔雀石（ＭＬ）相和ＦＣ型化合物组成的母体而制得。实验结果证明制备方法和组分配比对母体结构有重要影响。由ＭＬ和ＦＣ双相结构母体制得的催化剂合成甲醇活性优良。

提高费-托合成熔铁催化剂低碳烯烃选择性的研究

研究了固定床反应器中合成气制低碳烯烃熔铁催化剂的反应性能，考察了不同母体相组成和助催化剂对熔铁催化剂活性、低碳烯烃选择性的影响，通过TG-DTG、CO2-TPD等表征手段分析了母体相组成对熔铁催化剂的还原行为、表面酸碱性的影响。结果表明，当催化剂母体中n（Fe^2＋）／n（Fe^3＋）为1左右时，熔铁催化剂的表面碱性最强，有利于提高低碳烯烃选择性；考察助催化剂发现，稀土氧化物M2O3的加入能显著提高低碳烯烃选择性，在n（Hn）：n（CO）=1．6、2．0MPa、310℃、GHSV=11400h^-1的条件下，CO的转化率达73．8％，低碳烃烯烷摩尔比n（C2^=-C4^n）/n（C2°-C4°）达5．12，即在气态烃中低碳烯烃选择性达83．7％。正交实验分析结果表明，在所考察的5种助催化剂中，V2O5和MoO3的加入会降低低碳烯烃选择性；其它助催化剂没有显著影响。

Preliminary Study on Relationship Between Soil Parent Materials and Tea Quality

Six tea plantations with different soil-forming parent materials, the same tea variety and tea age and similar landforms and management were selected to conduct a systematic study on the relationship between soil properties and tea quality. The results showed that the quality of tea grown on the soils derived from granites, arenaceous shales, argillaceous sandstones, was superior; those on the soils derived from limestones,dolomites, Quaternary red clays, were inferior. Further study showed that sandy soils were beneficial to improving amino acid content of tea, and clayey soils made it decrease; high content of bases might decrease the contents of tea polypenols, caffeine, water extracts, but promote the content of amino acids; available phosphorous was significantly positively correlated with water extracts, but significantly negatively correlated with carbine; slowly available potassium was positively correlated with amino acid content. Soil parent materials should be regarded as an important factor in evaluating the adaptability of tea to soils.