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8篇 您的检索式:作者名="WAN Defang"
    题名 作者 年代 出处 被引量
1Discovery of Mass Independent Oxygen Isotopic Compositions in Superscale Nitrate Mineral Deposits from Turpan-Hami Basin,Xinjiang,China and Its Significance显示文摘在东方 Xinjiang 的 Turpan-Hami 盆是在地球上的最干燥的区域和首要的环境之一形成并且保存硝酸盐。在这盆的大硝酸盐矿石域最近被发现。它在那里被估计是硝酸盐的大约 25 亿个大量资源,并且数量像在智利的 Atacama 荒芜的超级规模的硝酸盐沉积物一样。硝酸盐是有团无关的分别(MIF ) 的一些矿物质之一,并且氧同位素 MIF 是一个有效方法决定硝酸盐的来源。17O,硝酸盐的 18O 被氟化作用和热分解方法测量。日期显示这是氧同位素 MIF 位于内陆硝酸盐矿物质的第一次。结果由二个方法获得了是类似的, 17O=17O0.52 映杯吗?LI Yanhe QIN Yan LIU Feng HOU Kejun WAN Defang 2010Acta Geologica Sinica(English Edition)2010,84,6:5
2N and O isotopes and the ore-forming mechanism of nitrate deposits in the Turpan-Hami Basin,Xinjiang,China显示文摘The recently discovered nitrate ore field in the Turpan-Hami Basin of western China represents an estimated resource of 2.5 billion tons, and is comparable in scale to the Atacama Desert super-scale nitrate deposit in Chile. The research on this area is rarely carried out, and the origin of the deposits remains uncertain. In this study, new methods were used to systematically analyze N and O isotopes in nitrate minerals collected from the Kumutage, Xiaocaohu, Wuzongbulak, Dawadi, Tuyugou, and Shaer ore deposits in the Turpan-Hami Basin. The data showed that the δ15NAir value ranges from 0.7‰ to 27.6‰, but mostly between 2‰ and 6‰, which was similar to atmospheric NO3-. The 18O was highly enriched with δ18OV-SMOW varying from 30.2‰ to 46.7‰. This differs from levels in deposits derived from microbial nitrogen fixation, but is similar to those in atmospheric nitrates. N and O isotopes data indicated that nitrate deposits in Turpan-Hami Basin must be the result of deposition of atmospheric nitrate particles. Although atmospheric nitrate particles are common, the nitrate deposits could form only under the condition of long-term extreme drought climate and very limited biological activity. This paper summarized the ore-forming mechanism of different types nitrate deposits based on their geological setting.QIN Yan LI YanHe LIU Feng HOU KeJun WAN DeFang ZHANG Cheng 2012Science China Earth Sciences2012,55,2:5
3Effect of methotrexate combined with Sanhuang Yilong decoction on serum and synovial fluid aquaporin levels in rheumatoid arthritis dampness-heat blockage syndrome显示文摘OBJECTIVE:To study the effect of methotrexate(MTX) combined with Sanhuang Yilong decoction(SYD) on aquaporin(AQP) expression,and to explore the role of AQPs in the pathogenesis of rheumatoid arthritis(RA).METHODS:A total of 118 dampness-heat blockage type RA patients who were hospitalized in the General Chengdu Military Hospital between January2014 and December 2016 were selected as subjects in this study(30 patient of these patients with knee joint effusion were assigned to the RA synovial fluid group).For the pre-treatment controlgroups,30 healthy volunteers were recruited as the healthy control group and 30 osteoarthritis(OA) patients with knee joint effusion were included as OA synovial fluid control group.The RA dampnessheat blockage syndrome treatment groups were divided into 45 cases in the combined group and 45 cases in the MTX group.The combined group received MTX combined with SYD treatment while the MTX group received MTX alone.AQP1,AQP2 and AQP3 expressions were detected in the serum and synovial fluid.RESULTS:AQP1 had the highest expression,followed by AQP3,and AQP2.The serum levels of AQP1,AQP2 and AQP3 were all significantly lower than those in the healthy volunteers(P < 0.05),while the synovial fluid AQP1,AQP2 and AQP3 expression in the RA group were comparable to these in the OA groups(P > 0.05).After treatment for2 weeks,serum AQP1,AQP2,AQP3 were significantly increased and erythrocyte sedimentation rate,C-reactive protein,disease activity score of 28 joints were decreased in the combined group(P < 0.05).CONCLUSION:Abnormal expression of AQPs inhibits water metabolism in RA dampness-heat blockage syndrome,so liquid is accumulated at the joint,which may play an important role in the pathogenesis of RA.MTX combined with SYD for the treatment of RA can effectively increase AQP expression.Liu Defang Yan Jiao Guo Mingyang Luo Yong Yang Mei Yang Min Zou Longfu Li Wan Zhong Xiaolong Liu Tao Hu Yonghe 2018Journal of Traditional Chinese Medicine2018,38,4:4
4Archean Mass-independent Fractionation of Sulfur Isotope:New Evidence of Bedded Sulfide Deposits in the Yanlingguan-Shihezhuang area of Xintai,Shandong Province显示文摘摘要:太古代的 bedded 硫化物存款的多重硫同位素比率(34S/33S/32S ) 在 Xintai 在泰山组的 Yanlingguan 形成被测量,山东省,中国的东方;33S =?0.7% ~ 3.8% , 34S =0.1%-8.8% , 33S =?2.3% 到 ?0.7% 。硫同位素作文显示出明显的团无关的分别(MIF ) 签名。在太古代的硫化物的硫同位素的 MIF 的存在显示硫从太阳的紫外放射导致的暴烈的 SO2 的光化学的反应的产品,暗示臭氧盾没在在那时间的空气被形成,并且氧水平是不到 10 ? 5 PAL (现在的空气水平)。SO2 的光分解作用与否定 33S 生产的硫酸盐在暴烈的活动中心附近猛抛;并且有积极 33S 的元素 S 的产品远猛抛离开暴烈的活动中心。硫化物的更低的 33S 价值(-2.30% 到 ?0.25%) Shihezhuang 在暴烈的中心附近,并且硫主要从硫酸盐的表演由光分解作用生产了。更高的 33S 价值(-0.5% 到 ?2%) 显示 Yanlingguan 是远的离开暴烈的中心并且一些硫从硫酸盐,从元素 S 的另外一个由光分解作用生产了。从 Yanlingguan 的硫同位素的数据点在 34S-33S 的阴谋上在到 MFL (集体依赖分别线) 的线平行,证明暴烈的硫种类通过了进海洋的大气的周期,然后集体依赖分别发生在硫化物的免职期间。从 Shihezhuang 的硫同位素的数据点代表不同的硫来源的混合。LI Yanhe HOU Kejun WAN Defang YUE Guoliang 2008Acta Geologica Sinica(English Edition)2008,82,2:2
5Process information parameterization of camshaft part for virtual high-speed grinding显示文摘CAO Defang DENG Zhaohui WAN Linlin 2011Advanced Materials Research2011,188,65:1
6Process Information Parameterization of Camshaft Part for Virtual High -- speed Grinding 显示文摘Cao Defang Deng Zhaohui Wan Linlin 2011Ad- vanced Materials Research2011,188,:1
7An Experimental Calibration on the Sphalerite-Galena Sulfur Isotope Geothermometer显示文摘A new experimental calibration was undertaken in this study to get a more reliable sphalerite-galenasulfur isotope geothermometer. The experimental conditions selected in study were very similar to those of naturalhydrothermal solution. The high-precision SF6 method was used in sulfur isotope analyses. The obtained calibrationcurve for sulfur isotope fractionation between sphalerite and galena can be expressed with the equation 1000lnαSp-Gn=0.74×106T-2+0.08.DING Tiping, ZHANG Chengxin, WAN Defang, LIU Zhijian and ZHANG Guilan Institute of Mineral Resources, Chinese Academy of Geological Sciences, 26 Baiwanzhuang Rd.,Beijing 100037 2003Acta Geologica Sinica(English Edition)2003,77,4:0
8Quartz-Ferberite Oxygen Isotope Geothermometer and Its Geological Applications显示文摘Experiments for oxygen isotope exchange between ferberite and water were carried out and the followingequation on oxygen isotope fractionation between ferberite and water against temperature was obtained:Combining this equation with the equation of Clayton et al. (1972) on oxygen isotope fractionation be-tween quartz and water, an equation on oxygen isotope fractionation between quartz and ferberite was ob-tained:The Bigeleison-Mayer function method was used to calculate the oxygen isotope fractionation betweenquartz and ferberite. The theoretical curve obtained agrees with the experimental calibration results quite wellin the temperature range of study.The above calibrated equation has been used in 5 world famous tungsten deposits to determine their tem-peratures of formation. The results show that the temperature range for an idividual deposit determined by thisgeothermometer agrees with those obtained from fluid inclusion determination and other isotopegeothermometers.Ding Tiping Liu Yushan Wan Defang Liu Zhijian Li Jincheng Zhang Guilan Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing 1992Acta Geologica Sinica(English Edition)1992,66,3:0
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