Chemical Composition of Aerosol and Fresh Snow and Tourism Influences at Baishui Glacier No.1 from Mt. Yulong,Southeastern Tibetan Plateau     

张宁宁  何元庆  Wilfred H Theakstone  庞洪喜 《中国地质大学学报(英文版)》2010,(2)

Aerosol and snow samples were collected at ablation zone of Baishui(白水) Glacier No.1,Mt.Yulong(玉龙),from May to June,2006.The concentrations of Cl-,NO3-,SO42-,Na+,K+,Mg2+,and Ca2+ were determined by ion chromatograph both in aerosol and snow samples.The average totalaerosol loading is 25.45 neq·scm-1,NO3-and Na+ are the dominant soluble ions in the aerosol,accounting for 39% and 21% of average total aerosol loading,respectively.Monsoon circulation reduces the concentration of most ions,indicating that wet sc...  相似文献   

Petroleum Characteristics and Controlling Factors in Lunnan Low Uplift,Tarim Basin     

王晓梅  张水昌 《中国地质大学学报(英文版)》2010,(2)

The Lunnan(轮南) low uplift is a complex basin that is situated in northwestern China.This area had undergone a range of tectonic events,and there are multi-production zones and reservoir types.Also,heavy oil,common black oil,volatilization oil,condensate oil and natural gas are approximately under the same stratum pressure grads and geothermal grads.The east Lunnan low uplift is mainly composed of condensate oil and natural gas,the middle part has many types of petroleum and the west part mostly has heavy oi...  相似文献   

Paleofire Indicated by Polycyclic Aromatic Hydrocarbons in Soil of Jinluojia Archaeological Site,Hubei,China     

邹胜利  李仁成  谢树成  朱俊英  王新君  黄俊华 《中国地质大学学报(英文版)》2010,(3)

Combustion-derived and land-plant-derived polycyclic aromatic hydrocarbons (PAHs) have been investigated by using the GC-MS analysis in an ancient soil profile from Jinluojia (金罗家) archaeological site at Macheng (麻城),Hubei (湖北) Province,Central China.Retene,cadalene and simonellite were proposed to be derived from contemporary land plants.The pyrolytic PAHs identified include fluoranthene,pyrene,benzofluoranthenes,benzo[e]pyrene and benzo[a]pyrene.The distribution of these pyrolytic PAHs varies with depth,d...  相似文献   

Static Stress Triggering Effects Related with M_s8.0 Wenchuan Earthquake     

朱航  闻学泽 《中国地质大学学报(英文版)》2010,(1)

In this article, firstly, we calculated and analyzed the patterns of Coulomb stress changes induced by a sequence of strong earthquakes that occurred in Songpan (松潘), Sichuan (四川) Province in 1973 and 1976, and discovered that the Ms8.0 Wenchuan (汶川) earthquake of 2008 was epicentered in a relevant Coulomb stress triggering zone. This suggests that the Coulomb stress on the middle and southern segments of the Longmenshan (龙门山) fault zone increased after the Songpan sequence of strong earthquakes, and the st...  相似文献   

试论月球科学与类地行星研究的学科属性     

周新华  林杨挺 《地球化学》2010,39(2):101-109

我国月球探测一期工程获国家批准立项和“嫦娥一号”卫星成功发射及运行这一历史性事件标志着我国已继人造地球卫星、载人航天阶段之后,开始进入人类航天活动的第三领域——深空探测。无疑此时探讨人类这一伟大社会实践活动的自然科学意义,特别是深空探测对象的科学内涵具有重要的现实意义。随着相关技术的开发、创新和成熟,工作重点将逐渐转移到深空探测对象本身的科学研究上来,即认识地球之外的行星体以及更深刻地重新审视地球。本文讨论了现阶段深空探测对象——月球及类地行星的基本物质属性,回顾美国和前苏联两国探月计划实施历史的启示,Apollo计划的演变．科学内容的纳入及宇航员地学素养的要求,Apollo登月计划的实施对月球科学本身的促进,以及对20世纪地球科学发展、人才队伍建设和分析技术进步等的重大影响,总结了前苏联探月计划的成败及其教训,并对我国月球探测工程立项历史等方面进行了分析。在此基础上,论述了月球科学及类地行星研究的地球科学属性,并强调指出地球科学家应将月球及整个类地行星研究纳入到地球系统科学的框架之中。  相似文献   

Screen and effect analysis of immunostimulants for sea cucumber,Apostichopus japonicus     

李继业  孙修勤  郑风荣  郝林华 《中国海洋湖沼学报》2009,27(1)

Immunostimulants may improve disease resistance of aquaculture animals by promoting the nonspecific immunity response of the organisms. Five types of saccharides, including chitosan, yeast polysaccharide, burdock oligosaccharide, seaweed polysaccharide and lentinus edodes polysaccharide, were screened for potential use as immunostimulants by using spectrophotometry. The saccharides were injected into Apostichopus japonicus, a sea cucumber, and the lysozyme and superoxide dismutase (SOD) activities of the coelomic fluid and epidermal slime were monitored in six consecutive days. The results show that the lysozyme activity of the animal's coelomic fluid was significantly stimulated on day 2, day 4 and day 6 after the injection of the saccharides (P<0.05). The effects of chitosan and yeast polysaccharide were the most notable. The lysozyme activity of the epidermal slime was significantly increased by chitosana, yeast polysaccharide, seaweed polysaccharide, and burdock oligosaccharide on day 1 and day 2 after the injection (P<0.05). The SOD activity of the coelomic fluid was significantly promoted by the saccharides on day 2 and day 4 post-injection (P<0.05), while the SOD activity of the epidermal slime increased on day 2. These findings indicate that chitosan and yeast polysaccharide are the most effective immunostimulants and potential healthy anti-disease feedstuff for A. japonicus.  相似文献