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Does arsenic play an important role in the soil microbial community around a typical arsenic mining area? 期刊论文  OAI收割
ENVIRONMENTAL POLLUTION, 2016, 卷号: 213, 期号: 0, 页码: 949-956
作者:  
Wu, Fan;  Wang, Jun-Tao;  Yang, Jun;  Li, Jing;  Zheng, Yuan-Ming
收藏  |  浏览/下载:37/0  |  提交时间:2017/03/24
Formation of the solidified microstructure in Mg-Sn binary alloy 期刊论文  OAI收割
Journal of Crystal Growth, 2011, 卷号: 322, 期号: 1, 页码: 84-90
J. W. Fu; Y. S. Yang
收藏  |  浏览/下载:36/0  |  提交时间:2012/04/13
Land use dynamics and landscape change pattern in Hetao irrigation district, Inner Mongolia, China 会议论文  OAI收割
6th International Symposium on Digital Earth: Data Processing and Applications, Beijing, China, September 9, 2009 - September 12,2009
Zhang, Yinhui; Luo, Yi; Zhao, Wenwu
收藏  |  浏览/下载:28/0  |  提交时间:2014/12/07
This study analyzed spatial and temporal changes in land use in an irrigation district covering an area of 1.7 million ha in Northern China by GIS analyses and also investigated changes in landscape pattern using the landscape structure analysis program FRAGSTATS over the study period from 1986 to 2000. The decreases in farmland and the increases in grassland area mainly resulted from the policy of grain for green and converting slope farmland into pasture from China government. In spite of the efforts to conserve the fragile ecosystem  the land degradation  including soil salinization and grassland degradation  was spreading rapidly. The area of alkali-saline land increased by 22493 ha and about 50555 ha of dense grassland degraded into mid-density grassland. In terms of landscape fragmentation  both farmland and dense grassland showed the tendency of increased fragmentation. Both adverse natural conditions and human activities are responsible for the land degradation expansion in Hetao irrigation district  but the root causes are increasing population pressure and irrational human activities  such as flooding irrigation method and over-grazing. To prevent land degradation from spreading  population control and improvement of the management are prerequisite approaches. 2010 SPIE.  
Speciation and distribution of arsenic and localization of nutrients in rice grains 期刊论文  OAI收割
NEW PHYTOLOGIST, 2009, 卷号: 184, 期号: 1, 页码: 193-201
作者:  
Meharg, A. A.;  Zhu, Y. G.;  Lombi, E.;  Scheckel, K. G.;  Pallon, J.
  |  收藏  |  浏览/下载:18/0  |  提交时间:2015/08/13
Fabrication of polysilicon thin film on glass with low-temperature UV-assisted crystallization (EI CONFERENCE) 会议论文  OAI收割
ICO20: Display Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Huang J. Y.; Ling Z. H.; Jing H.; Fu G. Z.; Zhao Y. H.
收藏  |  浏览/下载:32/0  |  提交时间:2013/03/25
The amorphous silicon (a-Si) film was crystallized on glass by a simple method employed ultraviolet at temperatures as low as 400C. The employ of ultraviolet enhanced the crystallization of amorphous silicon. This method is able to uniformly crystallized large-area amorphous silicon films. The polysilicon films crystallized by this way are suitable for the fabrication of thin film transistors on ordinary glass. Crystallization process is performed in a furnace. Amorphous silicon sample is placed on a hot plate and irradiated by a bank of ultraviolet lamps through a diffuser plate to improve the uniformity of light that irradiates the sample. Raman microscopy is used for analyzing the qualities of UV-assisted crystallized silicon films. By measuring the Raman spectra the effects of anneal temperature and process time on the crystallizing behavior  crystallinity and grain size of the processed films were obtained. There has a threshold temperature for crystallization of amorphous silicon film in the presence of ultraviolet irradiation with certain intensity  i.e. by ultraviolet irradiation with certain intensity only when the temperature is up to the threshold temperature  the crystallization can be triggered. The threshold temperature is 400C when the intensity of ultraviolet irradiation is 1mW/cm2. Above threshold temperature  the increase of anneal temperature increased the rate of crystallization. Crystallinity and grain size extracted from Raman spectra of samples increase with the extending of process time at certain temperature. Crystallization of amorphous silicon film with thickness of 50nm completed within 6 hours at 400C irradiated by ultraviolet with intensity of 2mW/cm2.  
The influence of element Y on the mechanical properties of the as-extruded Mg-Zn-Y-Zr alloys 期刊论文  OAI收割
Journal of Alloys and Compounds, 2006, 卷号: 426, 期号: 1-2, 页码: 155-161
D. K. Xu; L. Liu; Y. B. Xu; E. H. Han
收藏  |  浏览/下载:27/0  |  提交时间:2012/04/14
Effects of B or C on the macro-and micro-structures of cast near gamma TiAl alloys 期刊论文  OAI收割
ACTA METALLURGICA SINICA, 2002, 卷号: 38, 期号: 6, 页码: 643-646
作者:  
Dong, LM;  Cui, YY;  Yang, R
  |  收藏  |  浏览/下载:7/0  |  提交时间:2021/02/02
Effects of B or C on the macro-and micro-structures of cast near gamma TiAl alloys 期刊论文  OAI收割
ACTA METALLURGICA SINICA, 2002, 卷号: 38, 期号: 6, 页码: 643-646
作者:  
Dong, LM;  Cui, YY;  Yang, R
  |  收藏  |  浏览/下载:4/0  |  提交时间:2021/02/02