检索结果-南通市图书馆

Ectomycorrhizal fungal communities associated with Masson pine(Pinus massoniana lamb.) and oak {Quercus fabric Hance.) growing in a Mn mine site

在线全文

学校读者我要写书评

暂无评论

Ectomycorrhizal fungal communities associated with Masson pi...

Photoluminescence and Optical Transition Dynamics of Er^(3.) Ions in Porous Si

2.12.中国菌物学会学术年会

作者： Jian Huang~(1,3.),Kazuhide Nara~2.Chunlan Lian~3.(1 College of forest,Northwest A&F {2.,Shaanxi Province,Yangling,712.00,China 2.Graduate School of frontier Sciences,The university of tokyo,5-1-5 Kashiwanoha,Kashiwa 2.7-8563.{3. 3.Asian Natural Environmental Science Center,The university of tokyo,1-1-8 Midoricho, Nishitokyo,tokyo 188-0002.{3.)

The ectomycorrhizal fungal(EMF) communities associated with Masson pine(Pinus massoniana lamb.) and oak(Quercus fabric Hance.) were investigated in Xiangtan Mn mining area in Hunan Province,*** sampled trees were divided into three groups based on soil color:pine trees growing in yellow soil(normal soil type in the site,40 trees),pine trees in black soil(polluted with Mn mine wastes,40 trees) and oak trees in gray-black soil(3. trees).There were wide variations in N,P and metal concentrations in each type of *** Mn concentrations in the black rhizosphere soil was from 169.6 to 2.,598.4 mg kg(mean value:4,03..5),66.6 to 17,000.0 mg kg(4,2.6.8) in oak rhizosphere soils,and 163.0 to 8,898.4 mg kg(2.019.8 mg kg) in yellow rhizosphere soils of pine,*** rates of Masson pine growing in black soils(3..1±3..4%) and oak trees(3..9±15.2.),being not significantly different from each other,were lower than that of pine in the yellow soil(54.6±18.7%).In total,53.EMF OTUs were identified at 97%similarity threshold,of which 48 were found in pine trees and 2. in oak *** to pine trees in the yellow soil,EMF richness of pine in the black soil and oak was lower than that of pine in the yellow soil,but no significant differences in diversity *** was abundant in pine root systems(3..0%relative abundance),but rare in oak ectomycorrhizal tips(3.6%relative abundance).Russulaceae,which was dominant on pine root systems in the yellow soil,became rare on pine in the black soil(2.8%) and absent in oak *** further determine the effect of Mn concentrations on the EMF composition,richness,and diversity,80 pine root samples were classified into 8 subgroups according to Mn concentrations in the rhizosphere *** analysis showed a significantly negative effect of soil Mn on EMF richness(Mn ***:R =-0.795,P = 0.018).Atheliaceae was abundant(>2.%relative abundance) in seven subgroups with higher soil Mn concentrati

关键词： Ectomycorrhizal fungal community Manganese Mine wastelands Pinus massoniana Lamb. Quercus fabric Hance.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 1999年第4期15卷 357-362页

作者： Xinwei ZHAO Hideo Isshiki Yoshinobu Aoyagi and Takuo Sugano(frontier Research Program, The Institute of Physical and Chemical Research (RIKEN), 2.1 Hirosawa, Wako, Saitama 3.1-0198,{2.)Shuji Komuro(Faculty of Engineering. Toyo university, Kawagoe, Sa frontier Research Program Institute of Physical and Chemical Research (RIKEN) 2-1 Hirosawa Wako Saitama 351-0198 Japan Faculty of Engineering Toyo University Kawagoe Saitama 350-8585 Japan

Er was doped into porous Si by immersing the porous Si sample in a saturated ErCl3.ethanol solution. Sharp and intense 1.54 μm photoluminescence caused by intra-4f-shefl transitions in Er3. ions was observed up to room temperature. It is shown that the immersing process is valid to dope Er in high concentration in porous Si. Time resolved study of the Er-doped porous Si revealed that the doped Er3. ions are excited by energy transfer from photo-generated electron-hole pairs in the host. The energy back transfer process from the excited 4f electrons in the Er3.ion to the host is not a dominant factor to quench the Er-related emission in porous Si. Ourresults are well explained by a proposed model in which an intermediate state was introduced.

关键词： OO Photoluminescence and Optical Transition Dynamics of Er Ions in Porous Si Figure OK

An intracellular cystatin from the tick Haemaphysalis longicornis and its RNA interference effects on tick blood feeding

在线全文

学校读者我要写书评

暂无评论

An intracellular cystatin from the tick Haemaphysalis longic...

用MOVPE和RF-MBE方法极性控制生长GaN(英文)

中国畜牧兽医学会兽医公共卫生学分会成立大会暨第一次学术研讨会

作者： Jinlin Zhou~(1,2. Min Liao~1 Mami Ueda~1 Haiyan Gong~3.Xuenan Xuan~3.Kozo Fujisaki~(1*,3. (1 Department of frontier Veterinary Medicine,Kagoshima university,Korimoto 1-2.-2.,Kagoshima 890-0065,japan 2.Shanghai Veterinary Research Institute,Chinese Academy of Agricultural Sciences,Key Laboratory of Animal Parasitology of Ministry of Agriculture,Shanghai 2.02.0},China 3.National Research Center for Protozoan Diseases,Obihiro university of Agriculture and Veterinary Medicine,Inada-cho,Obihiro,Hokkaido 080-8555,japan)

Cystatins are tight-binding inhibitors of papain-like cysteine proteases and have been proposed to be the regulators of protein turnover and defense against pathogens.A gene encoding family 1 cystatin from tick Haemaphysalis longicornis (H1cyst-1)has been *** full-length cDNA is 43. bp,including an intact ORF encoding an expected protein with 98 amino *** analysis demonstrated that it has significant homology with the known family 1 *** recombinant protein was expressed in a GST-fused soluble form in Escherichia coli,and its inhibitory activity against papain, cathepsin L,and cathepsin B was identified by fluorogenic substrate ***-time PCR revealed the Hlcyst-1 is more highly expressed in the early developmental stages of the tick(embryo and larvae)and is distributed in different tissues. Moreover,the Hlcyst-1 gene can be effectively silenced by dsRNA injection,the tick feeding time was significantly prolonged,and the engorged body weight was significantly decreased by RNA *** results prove the Hlcyst-1 is a key molecule involved in the tick blood feeding *** hypothesis was also confirmed by the up-regulation of the Hlcyst-1 gene during tick feeding.

关键词： Haemaphysalis longicornis cystatin RNA interference blood feeding

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

发光学报 2001年第4期22卷 324-328页

作者： Yoshikawa A, Xu K, Jia A W,Takahashi K (Center for frontier Electronics and Photonics, Chiba, university VBL) ( Department of Electronics and Mechanical Engineering, Chiba university 1-3., Yayoi-cho, Inage-ku, Chiba,{3.) (Department of Media Science, T Center for frontier Electronics and Photonics Department of Media Science

本文报道了用低压ＭＯＶＰＥ和ＲＦ－分子束外延法在蓝宝石衬底上作极性控制的ＧａＮ生长。以“双Ａｌ单层”模型讨论了用ＭＯＶＰＥ和ＭＢＥ法在蓝宝石衬底上生长ＧａＮ的极性选择的机理，并对ＡｌＮ在极性转换过程中的作用给出了适当... 详细信息

本文报道了用低压ＭＯＶＰＥ和ＲＦ－分子束外延法在蓝宝石衬底上作极性控制的ＧａＮ生长。以“双Ａｌ单层”模型讨论了用ＭＯＶＰＥ和ＭＢＥ法在蓝宝石衬底上生长ＧａＮ的极性选择的机理，并对ＡｌＮ在极性转换过程中的作用给出了适当的解释。通过极性控制的生长，使ＭＢＥ法生长的ＧａＮ的表面形貌和电学特性都得到了改善；并对ＬＰ－ＭＯＶＰＥ生长开发出了一种“三步生长法”，这样就可以用更多的外延方式在蓝宝石衬底上生长出高质量的ＧａＮ膜。

关键词： GaN 外延生长 MOVPE RF-MBE 极性控制薄膜半导体材料蓝宝石氮化镓分子束外延

在线全文

学校读者我要写书评

暂无评论

田野调查与历史研究——以中国史研究为中心

上海师范大学学报（哲学社会科学版） 2003年第3期32卷 82-88页

作者：森正夫爱知县立大学

文章以中国史研究为中心,分析了当前日本中国明清史研究的前沿与方法,探讨了田野调查与历史研究的关系,强调历史研究要加强田野调查方法的使用。

关键词：中国史研究历史研究田野调查明清史研究日本近现代史

在线全文

学校读者我要写书评

暂无评论

新世纪初中国周边关系审视

唐都学刊 2002年第3期18卷 26-28页

作者：马云彤西安联合大学学报编辑部陕西西安710065

中国拥有漫长的陆地边界和海岸线 ,周边与包括俄罗斯、日本、印度 3.国在内的 2.1个国家相邻 ,安全环境十分复杂 ,地缘地位也十分重要。 2.1世纪初 ,中国应努力处理好与美国、俄罗斯、日本、印度之间尤其是与美国合作中有对抗的关系 ,... 详细信息

中国拥有漫长的陆地边界和海岸线 ,周边与包括俄罗斯、日本、印度 3.国在内的 2.1个国家相邻 ,安全环境十分复杂 ,地缘地位也十分重要。 2.1世纪初 ,中国应努力处理好与美国、俄罗斯、日本、印度之间尤其是与美国合作中有对抗的关系 ,同时加强与东盟、中亚诸国和南北朝鲜等的关系 ,积极营造和平安定的周边环境 ,创造有利于自身发展的外部条件 ,努力以和平方式达成国家的完全统一。

关键词：中国周边关系外交策略 2.世纪初

在线全文

学校读者我要写书评

暂无评论

辽宁地区发展对朝边境贸易SWOT分析

沈阳农业大学学报（社会科学版） 2011年第4期13卷 418-421页

作者：肖杨刘秀玲朱瑞雪大连民族学院国际商学院辽宁大连116605

辽宁发展对朝边境贸易有着特有的地理优势、人文优势和市场优势,但也存在商品结构不尽合理、经营主体实力不强、缺乏边境贸易出口生产基地、市场秩序混乱等劣势;随着朝鲜国内经济改革的推进,朝韩、朝日贸易减少和辽宁沿海经济带开发开... 详细信息

辽宁发展对朝边境贸易有着特有的地理优势、人文优势和市场优势,但也存在商品结构不尽合理、经营主体实力不强、缺乏边境贸易出口生产基地、市场秩序混乱等劣势;随着朝鲜国内经济改革的推进,朝韩、朝日贸易减少和辽宁沿海经济带开发开放及沈阳经济区两大发展战略的实施,辽宁对朝边境贸易迎来了新的发展机遇,同时,来自国内外的多种不利因素也给辽宁对朝边境贸易发展带来了挑战,辽宁应有效利用自身的优势和良好的发展机遇,克服存在的劣势,应对挑战,推进对朝边境贸易的进一步发展。

关键词：辽宁朝鲜边境贸易 SWOT分析经济改革沈阳经济区

EFFECTS OF SLEEP DEPRIVATION ON WHOLE NIGHT POLYSOMNOGRAPHY IN HEALTHY YOUNG MEN

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Second Medical university(Foreign Language Edition) 2009年第2期21卷 77-80页

作者：肖泽萍陈兴时王继军张明岛王红星胡珍玉路英智张载福甘景梨楼翡璎陈冲张天宏范青 Department of Electrophysiology Shanghai Mental Health Center Shanghai Jiaotong University

Objective To assess the effects of sleep deprivation (SD) on the whole night polysomnography (PSG) in healthy young men. Methods The whole night PSG was recorded by using Neurofax-1518K (Nihon Kohden, japan) system before and after 3. h of SD among 15 healthy male subjects. Results Compared with PSG before SD, post-SD PSG showed significantly shortened sleep latency (before SD: 19.7±9.3. after SD: 5.6±7.3. P2.1.9)%, after SD: (4.0±1.4)%, P3.3.7)%, after SD: (2..2.4.3.%, P<0.01]. Conclusion During post-SD sleep, the proportion of S4 NREM sleep was increased as compensation in healthy male. In addition, SD was proved to affect electrophysiological brain activities in normal people.

关键词： sleep deprivation polysomnography