|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Spatiotemporal characteristics, patterns, and causes of land-use changes in China since the late 1980s显示文摘Land-use/land-cover 变化(LUCC ) 有连接到人和自然相互作用。瓷器 Land-Use/cover 数据集(CLUD ) 从 1980 年代末在 5 年的间隔定期被更新到 2010,与基于 Landsat TMETM+ 图象的标准过程。陆地使用动态区域化方法被建议分析主要陆地使用变换。在国家规模的陆地使用变化的空间与时间的特征,差别,和原因然后被检验。主要调查结果如下被总结。越过中国的陆地使用变化(LUC ) 在最后 20 年(19902010 ) 里在空间、时间的特征显示了一个重要变化。农田变化的区域在南方减少了并且在北方,而是仍然是的全部的区域增加了几乎未改变。回收农田从东北被转移到西北。布满建筑物陆地很快膨胀了,主要在东方被散布,并且逐渐地展开到中央、西方的中国。树林首先减少了,然后增加但是荒芜的区域是反面。草地继续减少。在中国的 LUC 的不同空间模式被发现在之间迟了第 20 世纪并且早第 21 世纪。原版 13 个 LUC 地区在一些地区被边界的变化由 15 个单位代替。包括的这些变化(1 ) 的主要空间特征加速的扩大布满建筑物在 Huang-Huai-Hai 区域,东南的沿海的区域,长江的中流区域,和四川盆登陆;(2 ) 从东北中国和东方内部蒙古在北方转移了陆地开垦到绿洲在西北中国的农业区域;(3 ) 从在到稻的东北中国的喂雨的农田的连续转变回答;并且(4 ) 为在内部蒙古,黄土高原,和西南的多山的区域的南部的农业牧剧的交错群落的格林工程的谷物的有效性。在最后二十年,尽管在北方的气候变化在农田影响了变化,政策规定和经济驱动力仍然是越过中国的 LUC 的主要原因。在第 21 世纪的第一十年期间,在陆地使用模式驾驶了变化的人为的因素从单程的陆地开发转移了强调到开发和保存。动态区域化方法被用来在单位的 zoning 边界,地区的内部特征,和生长和减少的空间模式分析变化。结果揭示了变化过程的模式,也就是 LUC 的过程和在在不同阶段的特征的地区性的差别。地区的生长和减少在这动态 LUC zoning,在统一边界的变化,和在前者和后者十年之间的变化紧张的特征期间被检验。在为在不同类型和陆地使用的不同区域的变化的陆地使用和原因的模式和过程之间的其他的转变的模式被探索。 | LIU Jiyuan KUANG Wenhui ZHANG Zengxiang XU Xinliang QIN Yuanwei NING Jia ZHOU Wancun ZHANG Shuwen LI Rendong YAN Changzhe WU Shixin SHI Xuezheng JIANG Nan YU Dongsheng PAN Xianzhang CHI Wenfeng | 2014 | Journal of Geographical Sciences2014，24，2： | 245 |
| 2 | On the combined effect of soil fertility and topography on tree growth in subtropical forest ecosystems—a study from SE China显示文摘Aims The aim of our research was to understand small-scale effects of topography and soil fertility on tree growth in a forest biodiversity and ecosystem functioning(BEF)experiment in subtropical SE China.Methods Geomorphometric terrain analyses were carried out at a spatial resolution of 5×5 m.Soil samples of different depth increments and data on tree height were collected from a total of 566 plots(667 m2 each).The soils were analyzed for carbon(soil organic carbon[SOC]),nitrogen,acidity,cation exchange capacity(CEC),exchangeable cations and base saturation as soil fertility attributes.All plots were classified into geomorphological units.Analyses of variance and linear regressions were applied to all terrain,soil fertility and tree growth attributes.Important Findings In general,young and shallow soils and relatively small differences in stable soil properties suggest that soil erosion has truncated the soils to a large extent over the whole area of the experiment.This explains the concurrently increasing CEC and SOC stocks downslope,in hollows and in valleys.However,colluvial,carbon-rich sediments are missing widely due to the convexity of the footslopes caused by uplift and removal of eroded sediments by adjacent waterways.The results showed that soil fertility is mainly influenced by topography.Monte-Carlo flow accumulation(MCCA),curvature,slope and aspect significantly affected soil fertility.Furthermore,soil fertility was affected by the different geomorphological positions on the experimental sites with ridge and spur positions showing lower exchangeable base cation contents,especially potassium(K),due to leaching.This geomorphological effect of soil fertility is most pronounced in the topsoil and decreases when considering the subsoil down to 50 cm depth.Few soil fertility attributes affect tree height after 1-2 years of growth,among which C stocks proved to be most important while pH_(KCl)and CEC only played minor roles.Nevertheless,soil acidity and a high proportion of Al on the exchange complex affected tree height even after only 1-2 years growth.Hence,our study showed that forest nutrition is coupled to a recycling of litter nutrients,and does not only depend on subsequent supply of nutrients from the mineral soil.Besides soil fertility,topography affected tree height.We found that especially MCCA as indicator of water availability affected tree growth at small-scale,as well as aspect.Overall,our synthesis on the interrelation between fertility,topography and tree growth in a subtropical forest ecosystem in SE China showed that topographic heterogeneity lead to ecological gradients across geomorphological positions.In this respect,small-scale soil-plant interactions in a young forest can serve as a driver for the future development of vegetation and biodiversity control on soil fertility.In addition,it shows that terrain attributes should be accounted for in ecological research. | Thomas Scholten Philipp Goebes Peter Kühn Steffen Seitz Thorsten Assmann Jürgen Bauhus Helge Bruelheide Francois Buscot Alexandra Erfmeier Markus Fischer Werner Härdtle Jin-Sheng He Keping Ma Pascal A.Niklaus Michael Scherer-Lorenzen Bernhard Schmid Xuezheng Shi Zhengshan Song Goddert von Oheimb Christian Wirth Tesfaye Wubet Karsten Schmidt | 2017 | Journal of Plant Ecology2017，10，1： | 22 |
| 3 | Upregulation of Nogo receptor expression induces apoptosis of retinal ganglion cells in diabetic rats显示文摘The Nogo receptor is an essential factor for neuronal apoptosis, but the changes in Nogo receptor expression in the retina and the effects of the Nogo receptor on retinal ganglion cell apoptosis in diabetes mellitus remain unclear. We found that Nogo receptor expression was mainly visible in retinal ganglion cells of a rat model of diabetes mellitus induced by streptozotocin. At 12 weeks after onset of diabetes mellitus, Nogo receptor and Rho kinase expression significantly increased in the retina, and retinal ganglion cell apoptosis was apparent. When RNA interference was used to suppress Nogo receptor expression in rat retina, Rho kinase expression was obviously inhibited, and retinal ganglion cell apoptosis was evidently reduced in rats with diabetes mellitus. These results indicate that upregulation of Nogo receptor expression is an important mechanism of retinal ganglion cell apoptosis in rats with diabetes mellitus. | Xuezheng Liu Zhongfu Zuo Wanpeng Liu Zhiyun Wang Yang Hou Yunjie Fu Yuzhi Han | 2014 | Neural Regeneration Research2014，9，8： | 9 |
| 4 | The Suitability of Using Leaf Area Index to Quantify Soil Loss under Vegetation Cover显示文摘Soil erosion by water under forest cover is a serious problem in southern China.A comparative study was carried out on the use of leaf area index(LAI) and vegetation fractional coverage(VFC) in quantifying soil loss under vegetation cover.Five types of vegetation with varied LAI and VFC under field conditions were exposed to two rainfall rates(40 mm h-1 and 54 mm h-1) using a portable rainfall simulator.Runoff rate,sediment concentration and soil loss rate were measured at relatively runoff stable state.Significant negative exponential relationship(p < 0.05,R2 = 0.83) and linear relationship(p < 0.05,R2 = 0.84) were obtained between LAI and sediment concentration,while no significant relationship existed between VFC and sediment concentration.The mechanism by which vegetation canopy prevents soil loss was by reducing rainfall kinetic energy and sediment concentration.LAI could better quantify such a role than VFC.However,neither LAI nor VFC could explain runoff rate or soil loss rate.Caution must be taken when using LAI to quantify the role of certain vegetation in soil and water conservation. | ZHANG Wentai YU Dongsheng SHI Xuezheng WANG Hongjie GU Zhujun ZHANG Xiangyan TAN Manzhi | 2011 | Journal of Mountain Science2011，8，4： | 7 |
| 5 | Zonal Differences in Correlation Patterns Between Soil Organic Carbon and Climate Factors at Multi-extent显示文摘Studying the relationship between climate factors and soil organic carbon(SOC) is vitally important. However, how SOC responses to climate(temperature and precipitation) at cohesive extents is poorly studied. Two transects of approximately the same length(transect P and transect T) were selected to examine the variation of SOC content in relation to mean annual temperature(MAT) and mean annual precipitation(MAP). The coefficients of partial correlation between SOC density and MAT(Rt) and MAP(Rp) were determined to quantify the relationships between SOC density and the two climate factors. The results indicated that for transect T, Rt was statistically significant once the extent level was greater than or equal to two fundamental extent units, while for transect P, Rp showed statistical significance only at extent levels which were greater than two fundamental extent units. At the same extent levels but in different transects, Rts exhibited no zonal difference, but Rps did once the extent level was greater than two fundamental extent units. Therefore, to study the relationship between SOC density and different climate factors, different minimum extent levels should be examined. The results of this paper could deepen the understanding of the impacts that SOC pool has on terrestrial ecosystem and global carbon cycling. | QIN Falyu SHI Xuezheng XU Shengxiang YU Dongsheng WANG Dandan | 2016 | Chinese Geographical Science2016，26，5： | 5 |
| 6 | Screening and Characterization of the Alkaline Protease Isolated from PLI-1, a Strain of Brevibacillus sp. Collected from Indonesia's Hot Springs显示文摘A total of 69 strains of thermophilic bacteria were isolated from water, soil and sediment samples from three Indonesia's hot spring areas (Pantai cermin, Kalianda and Banyu wedang) by using Minimal Synthetic Medium (MSM). The extreme thermophile Brevibacillus sp. PLI-1 was found to produce extracellular thermophilic alkaline protease with optimal activity at 70℃ and pH 8.0-9.0. The molecular weight of the protease was estimated to be around 56 kD by SDS-PAGE. The maximum activity of the protease was 26.54 U mL-1. The protease activity did not decrease after 30 min and still retained more than 70% of relative activity after 60 min at 70℃ and pH 8.0. The ion Mg2+ was found to promote protease activity at both low and high concentrations, whereas Cu2+ and Zn2+ could almost completely inhibit the activity. Divalent cation chelator EDTA inhibited the enzyme activity by 55.06% ± 0.27%, while the inhibition caused by PMSF, Leupeptin, Pepstain A and Benzamidine were 66.78% ± 3.25%, 52.37% ± 0.25%, 62.47% ± 2.96% and 50.99% ± 0.24%, respectively. Based on these observations, the enzyme activity was conspicuously sensitive to the serine and cysteine protease inhibitors. All these results indicated that the protease isolated from the strain PLI-1 was a thermophilic protease and had a high-temperature stability and a pH stability. | WANG Shuai LIN Xuezheng HUANG Xiaohang ZHENG Li Dewi Seswita Zilda | 2012 | Journal of Ocean University of China2012，11，2： | 3 |
| 7 | Investigation of integrons/cassettes in antimicrobial-resistant Escherichia coli isolated from food animals in China显示文摘In this study,326 Escherichia coli isolates from food animals collected during the last four decades in China were characterized using antimicrobial susceptibility testing and screening for integrons/cassettes.Minimum inhibitory concentration(MIC) testing indicated that the antimicrobial resistance of E.coli has increased since the 1970s.The findings of this study present a warning to veterinary practitioners about the excessive use of antimicrobials,and suggest the necessity for surveillance and control of antimicrobial resistance in veterinary clinical medicine in China. | SONG Li1,NING YiBao1,SHEN JianZhong2,FAN XueZheng,ZHANG ChunPing1,YANG ChengHuai1 & HAN JianFeng3 1 China Institute of Veterinary Drug Control,Beijing 100081,China 2 China Agricultural University,Beijing 100094,China 3 China Center for Disease Control and Prevention,Beijing 100050,China | 2010 | Science China(Life Sciences)2010，53，5： | 3 |
| 8 | Acetalization of carbonyl compounds with 2,2,4-trimethyl-1,3-pentanedio catalyzed by novel carbon based solid acid catalyst显示文摘2 的合成,通过有 2 的 isobutyraldehyde 的 acetalization 的 4-diisopropyl-5,5-dimethyl-1,3-dioxane, 2,新奇的碳催化的 4-trimethyl-1,3-pentanediol (TMPD ) 基于酸首先被执行。高变换(≥98%) 和特定的选择用新奇的碳被获得基于酸,在它以后的保留的高活动它被再使用 5 次。而且,催化剂能被用来与优异产量催化不同的醛和酉同类的 acetalization 和 ketalization。几个产品的收益是超过 90% 。新奇异构的催化剂有高活动,在过程上面的惊人地简单的工作,非污染,和可重用性的明显的优点,它将极大地贡献绿过程的成功。 | Ling Liu Yuechang Zhao Shan Gan Xuezheng Liang Jianguo Yang Mingyuan He | 2008 | Journal of Natural Gas Chemistry2008，17，2： | 3 |
| 9 | High efficient acetalization of carbonyl compounds with diols catalyzed by novel carbon-based solid strong acid catalyst显示文摘The novel carbon-based acid catalyst has been applied to catalyzing the acetalization and ketalization. The results showed that the catalyst was very efficient with the average yield over 93%. The novel het- erogeneous catalyst has the advantages of high activity, wide applicability even to 7-membered ring acetals, strikingly simple workup procedure, non-pollution, and reusability, which will contribute to the green process greatly. | GAO Shan LIANG XueZheng WANG WenJuan CHENG WenPing YANG JianGuo | 2007 | Chinese Science Bulletin2007，52，21： | 3 |
| 10 | Production and characterization of an extracellular polysaccharide of antarctic marine bacteria Pseudoalteromonas sp. S-15-13显示文摘生产细胞外的多糖(EPS ) 的 27 个南极细菌被染色技术从 57 紧张选择。主要环境因素在生长和 Pseudoalteromonas sp 的 EPS 生产的效果。S-15-13 为描述分析被调查,并且 EPS 被分开并且净化。结果证明为 EPS 生产的最佳的条件是文化时期, 56 h;生长温度, 8 ℃;碳来源, 1.0%glucose;NaCl 集中, 3.0% ;氢指数 6.0 ~ 7.0。EPS 被冷乙醇降水,蛋白质移动,离子交换色层法和胶化层析技术净化。EPS 的 Themolecular 质量 - Ⅱ是由高效胶化浸透层析决定了的 62 kDa。它的糖作文是气体分析的甘露糖的人聚合物用色层法分离光谱学。在面对 EPS 细菌生物资源结冰重复并且融化以后,细菌的生长比在当随结冰融化周期的增加扩充的 EPS 和差别不在时结冰以后观察了高得多。它被假设 Pseudoalteromonas sp 的改编。S-15-13 到南极水兵条件,由低温度,高 NaCl 集中和重复结冰融化周期描绘了,可能与 EPSproduction 能力有关。 | LI Jiang CHEN Kaoshan LIN Xuezheng HE Peiqing LI Guangyou | 2006 | Acta Oceanologica Sinica2006，25，6： | 2 |
| 11 | Microstructure and heat treatment for Ni3Al-based single crystal alloy with different crystal orientations显示文摘Ni3Al-based single crystal alloy IC6SX with different crystal orientations were prepared by seed crystal method.The microstructure and heat treatment of the alloy were investigated.The results showed that the microstructure of the alloy was in dendrite structure,and the crystal orientation had significant effect on the dendrite morphology of this alloy.The precipitated phases of(MoNi)6C and NiMo appeared in the microstructure of the three alloys with different crystal orientations during solidification process.Compared with other two alloys,the volume fractions of precipitated phases of both(MoNi)6C and NiMo was the most in the alloy with[111]orientation and the least in the alloy with[001]orientation.The solidus and liquidus temperatures of the alloy IC6SX tested by differential scanning calorimetry(DSC)were 1356℃and 1387℃,respectively.Meanwhile,the effect of different solution temperatures on the microstructure of the alloy with different orientations was studied.The results showed that the precipitated phases of(MoNi)6C and NiMo were eliminated with the solid solution treatment under the condition of 1300℃/10h.However,the incipient melting of the alloys occurred due to the dissolution of low melting point phases.As the temperature dropped to 1280℃,the area of incipient melting in the alloy with different orientations decreased gradually.However,there was no incipient melting appearing in the three alloys with different orientations when the solution treatment temperature dropped to 1260℃. | Liwu Jiang Xuezheng Dou Meiling Wu Min Cai | 2020 | Progress in Natural Science:Materials International2020，30，4： | 2 |
| 12 | Relationship between soil erosion and distance to roadways in undeveloped areas of China显示文摘 | WANG Ku SHI Xuezheng YU Dongsheng | 2008 | Catena2008，72，2： | 1 |
| 13 | Cloning and Expression of lipP, A Gene Encoding a Cold-Adapted Lipase from Moritella sp.2-5-10-1显示文摘 | Xiuxia Yang Xuezheng Lin Tingjun Fan Ji Bian Xiaohang Huang | 2008 | Current Microbiology2008，，2： | 1 |
| 14 | Source identification and spatial variability of nitrogen, phosphorus, and selected heavy metals in surface water and sediment in the riverine systems of a peri-urban interface显示文摘 | HUANG BIAO ZHAO YANFENG SHI XUEZHENG | 2007 | Journal of Environmental Science And Health Part A-Toxic/ Haza Rdous Substances & Environmental Engineering2007，42，3： | 1 |
| 15 | Environmental assessment of small - scale vegetable fanning systems in peri - urban areas of the Yangtze River Delta Region, China显示文摘 | Biao Huang Xuezheng Shi Dongsheng Yu | 2006 | Agriculture Ecosystems and Environment2006，112，： | 1 |
| 16 | A WebGIS system for relating genetic soil classification of China to soil taxonomy 显示文摘 | Shi Xuezheng Yang Gaoxiang Yu Dongsheng | 2010 | Computers & geosciences2010，36，6： | 1 |
| 17 | Ordering trees with given pendent vertices with respect to Merrifield-Simmons indices and Hosoya indices显示文摘 | Xuezheng LV Yan YAN Aimei YU | | 0，，01： | 1 |
| 18 | The Merrifield-Simmons indices and Hosoya indices of trees with k pendant vertices显示文摘 | Aimei YU Xuezheng LV | | 0，，01： | 1 |
| 19 | Surface water quality of factory-based and vegetable-based peri-urban areas in the Yangtze River Delta region, China显示文摘 | ZHANG QingLi SHI Xuezheng HUANG Biao | 2007 | Catena2007，69，1： | 1 |
| 20 | Bacterial and archaeal community structure of pan-Arctic Ocean sediments revealed by pyrosequencing显示文摘This study was to investigate bacterial and archaeal community structure of pan-Arctic Ocean sediments by pyrosequencing.In total,investigation of three marine sediments revealed 15 002 bacterial and 4 362 archaeal operational taxonomic units(OTUs) at the 97% similarity level.Analysis of community structure indicated that these three samples had high bacterial and archaeal diversity.The most relatively abundant bacterial group in Samples CC1 and R05 was Proteobacteria,while Firmicutes was dominant in Sample BL03.Thaumarchaeota was the most relatively abundant archaeal phylum in Samples CC1 and R05,and the relative abundance of Thaumarchaeota was almost as high as that of Euryarchaeota in Sample BL03.These two phyla accounted for nearly 100% of the archaeal OTUs.δ-Proteobacteria and γ-Proteobacteria were the two most relatively abundant classes at Proteobacterial class level,and their relative abundance was more than 60% in Samples CC1 and R05.There were also differences in the top 10 relatively abundant bacterial and archaeal OTUs among the three samples at the 97% similarity,and only 12 core bacterial OTUs were detected.Overall,this study indicated that there were distinct microbial communities and many unique OTUs in these three samples. | LIN Xuezheng ZHANG Liang LIU Yanguang LI Yang | 2017 | Acta Oceanologica Sinica2017，36，8： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员