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| 1 | Regional assessment of cadmium pollution in agricultural lands and the potential health risk related to intensive mining activities: A case study in Chenzhou City, China显示文摘The purpose of this study was to assess the extent of cadmium (Cd) contamination in agricultural soil and its potential risk for people. Soils, rice, and vegetables from Chenzhou City, Southern China were sampled and analyzed. In the surface soils, the 95% confidence interval for the mean concentration of Cd varied between 2.72 and 4.83 mg/kg (P < 0.05) in the survey, with a geometric mean concentration of 1.45 mg/kg. Based on the GIS map, two hot spot areas of Cd in agricultural soils with high Cd concentrations were identified to be located around the Shizhuyuan, Jinshiling, and Yaogangxian mines, and the Baoshan and Huangshaping mines, in the center of the city. About 60% of the total investigated area, where the agricultural soil Cd concentration is above 1 mg/kg, is distributed in a central belt across the region. The critical distances, at which the soil Cd concentration were increased by the mining activities, from the mines of the soils were 23 km for the Baoshan mine, 46 km for the Huangshaping mine, and 63 km for the Shizhuyuan mine, respectively. These are distances calculated from models. The Cd concentrations in rice samples ranged from 0.01 to 4.43 mg/kg and the mean dietary Cd intake from rice for an adult was 191 μg/d. Results of risk indexes showed that soil Cd concentrations possessed risks to local residents whose intake of Cd from rice and vegetables grown in soils in the vicinity of the mine was 596 μg/d. | ZHAI Limei LIAO Xiaoyong CHEN Tongbin YAN Xiulan XIE Hua WU Bin WANG Lixia | 2008 | Journal of Environmental Sciences2008，20，6： | 35 |
| 2 | Subcellular distribution and compartmentalization of arsenic in Pteris vittata L.显示文摘The subcellular distribution of arsenic (As) in Pteris vittata L., an As-hyperaccumulator, was studied to de- termine As compartmentalization and to explore the mecha- nisms that confer As tolerance. When the plant was grown in a nutrient solution without additional As, most of the accu- mulated As was isolated to the cell wall. However, in plants growing in a nutrient solution containing 0.1 or 0.2 mmol/L As, approximately 78% of the total As accumulated within the pinna. The proportions of As accumulation in the cyto- plasmic supernatant fraction were 78% of that in the pinna and 61% of that in the plant. In either treatment group (0.1 or 0.2 mmol/L As), the fraction containing the lowest level of As was the organelle fraction. These results suggest that As accumulates in the pinna where it is primarily distributed in the cytoplasmic supernatant fraction. The role of As com- partmentalization may be intricately linked with As detoxi- fication in P. vittata L. | CHEN Tongbin YAN Xiulan LIAO Xiaoyong XIAO Xiyuan HUANG Zechun XIE Hua ZHAI Limei | 2005 | Chinese Science Bulletin2005，50，24： | 17 |
| 3 | n-Octadecanethiol Self-Assembled Monolayer Coating with Microscopic Roughness for Dropwise Condensation of Steam显示文摘Here we presented a novel technology to achieve a Super-hydrophobic coating with microscopic roughness oncopper surface. First, make a layer of verdigris grow on the fresh pure copper surface. Gain it by exposing thecopper to air and the mist of acetic acid solution. The green coating is a mixture of basic copper(Ⅱ) carbonate andcopper(Ⅱ) acetate. Second heat the coating and make it decompose to CuO. Lastly, form an n-octadecanethiolself-assembled monolayers coating on the outermost surface. Contact angle test, scanning electron microscopeanalysis and electrochemical testing were carried out to characterize the surface, and a heat transfer experimentfor dropwise condensation of steam was performed also. Results show that the modified surface bears a few Super-hydrophobicfeatures, the static contact angle is higher than that in literatures, reaching 153.1±1.7°. The microscopicroughness can be seen in SEM images, differing much from H2O2 etched surface and bare copper surface.The condensation of steam on the surface is a typical form of dropwise condensation, in the measured rangeof temperature difference, under 0.1 MPa, the average convection heat transfer coefficients of the vertical surfaceare 1.7~2.1 times for those of film condensation. At the same time, the inhibition efficiency of surface is improvedto some extent comparing with the same kind of SAMs, which suggests that the lifetime of maintenancedropwise condensation would have the possibility to surpass the existing record. | Liang CHEN Shiqiang LIANG Runsheng YAN Yanjun CHENG Xiulan HUA Shuling CHEN | 2009 | Journal of Thermal Science2009，18，2： | 2 |
| 4 | Vasculogenic mimicry is associated with high tumor grade, invasion andmetastasis, and short survival in patients with hepatocellular carcinoma显示文摘 | Baocun Sun Shiwu Zhang Danfang Zhang Jing Du Hua Guo Xiulan Zhao Wei Zhang Xishan Hao | 2006 | Oncology Reports2006，，4： | 1 |
| 5 | Plant drought tolerance trait is the key parameter in improving the modeling of terrestrial transpiration in arid and semi-arid regions显示文摘陆面过程蒸腾作用的模拟制约着天气,气候降水预测的精确度.近几十年来,为了更好地描述植被蒸腾的水力约束,陆面过程模式发展了基于植物性状的植物水力胁迫方案.然而,我们对于植物性状在蒸腾模拟中的地位仍然缺乏了解,植物性状对蒸腾的重要性仍需进一步量化.本研究利用Morris方法评估植物性状参数在通用陆面模式植物水力胁迫方案(CoLM-P_(50)HS)中的重要性,针对17种植物性状,筛选出最为重要的:耐旱性状(P_(50)),气孔性状,和光合作用性状.在12个FLUXNET站点中,参数的重要性由归一化敏感度来衡量.P_(50)的重要性随着降水的减少而增加,而气孔性状和光合作用性状的重要性则随着降水的减少而减少.在干旱或半干旱地区,P_(50)比气孔性状和光合作用性状更重要,这意味着当植物经常经历干旱时,水力安全策略比植物生长策略更关键.而耐旱性状的巨大变异性进一步暗示了多种植物水力安全策略的共存.忽视P_(50)的变异性可能会对陆面过程模式蒸腾作用的模拟造成严重误差.因此,为了更好地表示植物水力功能的变异性,需要增加对耐旱性状的观测并耦合到陆面模式中. | Xintao Liu Xingjie Lu Shulei Zhang Zhongwang Wei Nan Wei Shupeng Zhang Hua Yuan Wei Shangguan Shaofeng Liu Jianfeng Huang Lu Li Xiulan Ye Jinxuan Zhou Wenke Hu Yongjiu Dai | 2022 | Atmospheric and Oceanic Science Letters2022，15，1： | 1 |
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