InGaAsP/InP MQW电流控制型双稳/非线性增益开关激光器

一种电流控制型二端及三端MOW(多量子阱)InGaAsP/InP双区共腔双稳/非线性增益开关激光器业已研制成功,文中报道了部分结果.

Roles of sorting and chemical weathering in the geochemistry and magnetic susceptibility of Xiashu loess；East China

IEECAS SKLLQG

Discrimination of Type 2 diabetic patients from healthy controls by using metabonomics method based on their serum fatty acid profiles

Metabonomics, the study of metabolites and their roles in various disease states, is a novel methodology arising from the post-genomics era. This methodology has been applied in many fields, including work in cardiovascular research and drug toxicology. In this study, metabonomics method was employed to the diagnosis of Type 2 diabetes mellitus (DM2) based on serum lipid metabolites. The results suggested that serum fatty acid profiles determined by capillary gas chromatography combined with pattern recognition analysis of the data might provide an effective approach to the discrimination of Type 2 diabetic patients from healthy controls. And the applications of pattern recognition methods have improved the sensitivity and specificity greatly. (C) 2004 Elsevier B.V. All rights reserved.

低山丘陵半干旱区小流域综合治理初报

低山丘陵半干旱区气候干旱、土地贫瘠、水土流失严重 ,加上人类活动的长期负面影响 ,使得该地区生态环境不断恶化。而以小流域为单元的综合治理是改善本地区生态环境、促进农业和农村经济持续发展的有效途径。该文结合低山丘陵半干旱区的自然和社会经济条件 ,论述了进行小流域综合治理的重要性 ,并总结了该地区治理的具体措施和取得的经济、生态和社会效益 ,可以为同类地区生态环境建设提供参考。

鸡粪高效降解微生物菌剂富集培养新法

以新鲜鸡粪为主要培养基,自然腐熟鸡粪(处理1),菌剂腐熟鸡粪和土壤(处理2),菌剂腐熟鸡粪(处理3)为富集样品连续5批堆肥驯化培养,使微生物菌群经历不同的生长环境,达到优胜劣汰的效果。处理1在5批富集培养中较处理2和处理3有较好的堆肥效果,说明其中有降解性能好的优势菌群,将其筛选出扩大培养,再回接到新鲜鸡粪中,将会快速、有效地降解新鲜鸡粪,达到良好的堆肥效果。