Renewable hydrogen from ethanol by autothermal reforming

Ethanol and ethanol-water mixtures were converted directly into H2 with approximately 100% selectivity and >95% conversion by catalytic partial oxidation, with a residence time on rhodium-ceria catalysts of <10 milliseconds. Rapid vaporization and mixing with air with an automotive fuel injector were performed at temperatures sufficiently low and times sufficiently fast that homogeneous reactions producing carbon, acetaldehyde, ethylene, and total combustion products can be minimized. This process has great potential for low-cost H2 generation in fuel cells for small portable applications where liquid fuel storage is essential and where systems must be small, simple, and robust.     

N-硝基三氯苯胺类化合物的杀虫活性研究

试验了6个N-硝基三氯苯胺类化合物在500mg.L-1浓度下对菜粉蝶5龄幼虫的杀虫活性。结果表明,筛选出来的化合物N-硝基-N-(N'-对乙酰基苯基)-氨基甲酰-2,4,6-三氯苯胺、N-硝基-N-(N'-间硝基苯基)-氨基甲酰-2,4,6-三氯苯胺和N-硝基-N-(N'-对硝基苯基)-氨基甲酰-2,4,6-三氯苯胺对菜粉蝶5龄幼虫均具有一定的杀虫活性,其LC50分别为447.19mg.L-1、67.63mg.L-1和224.85mg.L-1。     

粗厚山羊草细胞质小麦核代换系育性差异

研究1996至1997年用D2类山羊草的粗厚山羊草4X,6X种细胞质小麦核代换系及其核亲本在我国北纬25°01′至47°08′的5个地点种植。调查了各点各期的自交结实率,结合各点、各期试验材料拔节至抽穗的日长、旬平均气温分析试验材料与日长、温度的关系。结果为(1)粗厚山羊草(6X,4X),随日长的增加,育性下降。其中,粗厚山羊草细胞质某些核代换系在我国适宜光、温条件下可出现完全雄性不育。(2)粗厚山羊草4X种细胞质和6X种细胞质的光温反应存在差异。（3）6X种细胞质的光温敏感性高于4X种细胞质。(4)粗厚山羊草细胞质核代换系的育性在日长相近条件下,温度升高,育性有提高。