藏医水银炮制法渊源初探   总被引：1，自引：0，他引：1  

杨伟雄  张晟 《青海师范大学学报(自然科学版)》2003,(2):59-61

将现代与古代藏医对水银的炮制加工方法与内地道家水银炮制法进行比较研究，以寻求藏医水银炮制法渊源．  相似文献   

Mercury pollution in Rana Chensinensis in Weisha River reach, in the upstream region of Songhua River     

WANG Ning ZHU Yanming MENG Dan 《科学通报(英文版)》2005,50(19):2166-2170

Twice a year continuous samples of Rana Chensinensis and sediments have been collected near gold mine in the upstream region of Songhua River from 2000 to 2002, for analyzing the total mercury （THg）, methylmercury （MeHg） concentration and correlation in sediments, muscles, livers of the frog. The study indicates that THg and MeHg concentrations in polluted samples near the gold mine are higher than those in unpolluted ones. THg and MeHg con- centrations are higher in autumn, in female, and in livers than those in spring, in male, in muscles respectively. The order of concentration degree in the frog organizations is as follows： liver〉muscle〉ovum〉Fallopian tube. MeHg is the main form of mercury （Hg） existing in autumn, while inorganic Hg is in spring. There is no distinct difference of CMeHg/CTHg between male and female, livers and muscles. The correlation between MeHg concentrations in the river sediments and in the frog＇s livers and muscles are significant, which is related to disorderly discharge of Hg.  相似文献   

贵州省汞污染防治与生态恢复   总被引：8，自引：1，他引：7  

瞿丽雅 《贵州师范大学学报(自然科学版)》2002,20(3):56-59

主要介绍贵州省汞污染地区的污染现状，并对生态恢复和防治进行了探讨。  相似文献   

大厂长坡锡-多金属矿床热释汞特征及分布规律   总被引：4，自引：0，他引：4  

王桂琴  罗先熔  余阳先  韦可利 《广西科学》2003,10(2):122-125

选择长坡锡矿区地表出露岩石剖面一条、近矿围岩井下已知剖面6条，采集岩石及矿体(矿石)样品共102个，加工为200目颗粒，用RG—1D型测汞仪，在700℃下测试分析。结果表明：大厂长坡锡一多金属矿床的热释汞，在空间上随矿体赋存明显呈由下到上的“三层楼”式分布，即下部似层状矿体含汞量＜中部纫脉型矿体汞量＜上部裂隙脉型矿体汞量，汞随矿体沿构造滑脱面及裂隙带上升运移；在平面上似层网脉状矿体中部含汞量高，边部低，细脉状矿体边部高中间低，裂隙脉矿群底部低，顶部高，清晰地体现了汞运移扩散的路径。根据汞的运移和赋存形式推判汞异常形成过程为汞伴随深大断裂和多次的岩浆入侵上升，并在成矿过程中赋存于富含硫化物的矿床中，良好的容矿构造和矿石围岩岩性保障了汞的运移和赋存。  相似文献   

原子荧光光度法测定生物体内汞含量     

马文  杨越 《安徽大学学报(自然科学版)》1997,21(2):85-87

用硫酸—尿素—硝酸消化法和原子荧光光度法测定生物内汞含量，方法的准确度和精密度都较理想，操作亦简便、快速  相似文献   

化学振荡反应延迟时间与微量元素Ag，Hg定量关系的研究   总被引：3，自引：0，他引：3  

赵祥大  许志强 《安徽大学学报(自然科学版)》1994,18(2):54-60

化学振荡反应在化学、生化、生命科学领域具有重要意义。本文通过向Ｂ—Ｚ振荡体系内加入外界干扰离子Ａｇ＋，Ｈｇ２＋，研究该体系起振延迟时间ｔ廷与外加离子Ａｇ＋，Ｈｇ２＋浓度之间的定量关系，发现两者之间在一定条件、一定范围内具有良好线性关系，并对该振荡反应机理作了初步探讨。  相似文献   

四氮杂大环-N-二乙酸与Zn(Ⅱ)、Cd(Ⅱ)、Hg(Ⅱ)配合物的合成及表征     

陈礼勤  倪诗圣  徐济德  汪国建 《安徽大学学报(自然科学版)》1990,(4)

本文报道在水溶液中合成的三种四氮杂大环-N-二乙酸(H_2L~1,H_2L~2和 H_2L~3)与Zn(Ⅱ),Cd(Ⅱ),Hg(Ⅱ)的固体配合物,用元素分析、电导测定及红外光谱对其组成进行了确定。H_2L~1、H_2L~2与三种金属离子分别形成组成为 ZnL·2HCl·nH_2O,Cd(H_2L)·2HCl·Cl_2·nH_2O 和 Hg_2(H_2L)·Cl_4·nH_2O 的配合物。H_2L~3与三种金属离子形成组成为 M_2L·Cl_2·nH_2O 的配合物。根据这些结果提出了这些配合物的可能结构。  相似文献   

双模板法同步诱导合成硒化汞微球和纳米颗粒     

贾润萍  吴庆生  丁亚平 《同济大学学报(自然科学版)》2007,35(2):218-221

利用大葱生物膜内外有别的结构特性模拟生物矿化过程，在室温下同步诱导合成出颗粒状和球状两种不同形貌的硒化汞材料，前者尺寸约为200nm的大纳米颗粒，该产物可能是由尺寸约30nm的小纳米粒子组装而成；后者尺寸约为3μm的高度致密的带花边的实心圆球，该产物可能是自发生长或由直径约1μm的小球组装而成．其结构均为立方相，晶格常数为0．608nm．通过紫外可见光谱（UV—Vis）和荧光光谱（Fluorescence，FL）对产物的光学性质进行了研究．初步探讨了硒化汞的合成机理．  相似文献   

流动注射-冷蒸汽发生AAS法测定烟草样品中的痕量汞   总被引：6，自引：0，他引：6       下载免费PDF全文

冯雷  张承聪  扬艳  杨金辉 《云南大学学报(自然科学版)》2002,24(6):454-456

 研究了以KBH₄为还原剂的流动注射-冷蒸汽发生原子吸收光谱法,测定烟草中痕量汞.就其分析条件对灵敏度影响进行了优化研究.本方法共存离子干扰小,精密度较高(平行测定10ng/mL的标准样品7次的相对标准偏差为2.80%)、检测限好(0.4ng/mL),线性范围在0.4～60ng/mL之间.利用HNO₃-H₂O₂体系微波消解进行了样品前处理,有较高的样品回收率(98.15%).测定结果令人满意.  相似文献   

Neurobiological disruptions induced in brains of the rats fed with mercury contaminated rice collected from experimental fields in Guizhou Province, China   总被引：3，自引：0，他引：3       下载免费PDF全文

CHENG Jinping YUAN Tao YANG Liu HU Weixuan ZHENG Min WANG Wenhua LIU Xiaojie QU Liya 《科学通报(英文版)》2005,50(21):2441-2447

Guizhou Province, located in the southwestern China, is an important mercury （Hg） production center. High levels of Hg were found in local environmental and biomass samples. The neurobiological disruptions induced in brains of rats fed with Hg polluted rice collected from two experimental plots in Guizhou Province were studied. The plots are close to the Hg mine of Wanshang area and a chemical plant （where Hg is used as a catalyst for the production of acetaldehyde） of Qingzhen area. Rats were fed for 30 d before toxicological end points were tested. The results showed that the accumulations of Hg in rat＇s brain of Qingzhen chemical plant group and Wanshang mine group were significantly higher than those of Shanghai group （control group） （P〈0.01）. The neural transmitters, including acetylcholine （Ach）, acetylcholine enzyme （AchE）, nitric oxide and nitricoxide synthase （NOS）, in rat＇s brain were significantly affected. Oxidative stress was observed in the exposure groups. The expression levels of the immediately early gene （lEG）, c-fos and c-FOS proteins were induced by the Hg polluted rice. It was noted that the lEG （c-fos） participated in the neurotoxic process induced by the Hg polluted rice. lEG response to Hg might be dependent on interactions between neural transmitter and oxidative damage, c.fos could be used as an effective index of detecting and assessing the neurotoxicity of Hg. The results suggested that it should be alert to mental health problem in human beings eating Hg-polluted food. More efforts are necessary to protect the local ecosystem and human health in the Hg polluted areas such as Wangshan and Qingzhen in Guizhou Province of China.  相似文献