掺铝氧化锌厚膜制备及其对三甲胺和海产品鲜度的敏感性

用烧结法制备掺铝氧化锌厚膜，把氧化锌粉末分别同０％，１％，３％，５％的Ａｌ２Ｏ３粉末机械研磨混合均匀，在１１００℃下烧３ｈ，再同粘合剂，有机溶剂混合制成浆料，用刮刀法在氧化铝基片上浆料制成膜，在１００℃下烘干后再经１１００℃烧结２ｈ。膜的灵敏度的测量方法是将膜放在玻璃管内加热到测量温度，测量膜暴露在一定浓度ＴＭＡ气体或由牡蛎放出的气体时电阻值的变化。测量温度为２００，２５０，３００℃和４００℃，Ｔ     

Marine diatom Thalassirosira weissflogii nutrient drawdown and its physiological status variation challenged to zinc and cadmium exposure

The uptake of zinc and cadmium by a species of marine diatom Thalassirosira weissflogii and the nutrient variation (phosphorus and silicon) in the culture medium were estimated when exposed to zinc and cadmium stress under controlled laboratory conditions.It was found that low cadmium addition could stimulate the culture to grow with a relatively high rate and exert its toxicity at the elevated concentration.The cellular uptake of zinc and cadmium by the diatom varied in the ranges of 1.21~3.75 and 0.060~0.629 fmol per cell respectively in the whole cultivation period.The mean cellular phosphorus and silicon drawdowns were constant with 0.26~0.42 and 0.30~0.46 pmol per cell respectively in those healthy cultures.It is illustrated that the algal cells can adjust some physiological mechanisms to decrease metal accumulation and keep metal homeostasis in the organism.The correlation analysis results further indicate that the cellular cadmium uptake might be closely related with the cellular phosphorus, silicon drawdown and the growth rate of diatom (P<0.05, 0.001, 0.01); and the cultures grow better in good conditions, the lower amount of phosphorus, silicon materials are consumed by a single cell to keep a high efficiency of utilization.     

含羟基西佛碱型大环冠醚铜(Ⅱ)、锌(Ⅱ)配合物的合成与表征

利用模板法合成 1种新的含醇羟基西佛碱型大环冠醚 L (7,11-二氮杂 - 3,15 -二氧杂 - 4 ,5 ;8,10 ;13,14-三苯并环十六 - 6 ,11-二烯 - 1-醇 )的铜、锌配合物。经元素分析 ,IR、MS分析确定配合物的组成 M(L2 ) (NO3 ) 2 及其配位情况 ,由模板反应得到 [1+ 1]型西佛碱大环化合物。 DMF溶液中的电导数据证实它们均属非电离型 ,并运用 TG- DTA分析比较铜、锌配合物的热稳定性。     

Geodynamically indicated targeting strategy for shale‐hosted massive sulfide Pb–Zn–Ag mineralisation in the Western Fold Belt,Mt Isa terrane

There is ongoing debate with respect to the genetic models for shale‐hosted massive sulfide Pb–Zn–Ag deposits contained in the Palaeoproterozoic to Mesoproterozoic intracontinental Isa Superbasin in the Western Fold Belt, Mt Isa terrane. Favourable sites of mineralisation can be predicted based on understanding the tectonic setting of the Isa Superbasin, the structural controls of mineralisation and the chemically favourable environments for ore deposition. Shale‐hosted massive sulfide Pb–Zn–Ag deposits are hosted in successions deposited during the dominant sag‐phase of the Isa Superbasin. These deposits are localised at the intersections of major basin‐scale extensional faults and are hosted in both shallow‐marine and deeper water carbonaceous shales that are characteristically anoxic and located near or at maximum flooding surfaces. All major shale‐hosted massive sulfide Pb–Zn–Ag deposits are located to the west of the Mt Isa Rift (ca 1710–1670 Ma). This spatial association is explained by an asymmetrical lithosphere extension model for the evolution of the Isa Superbasin. Elevated geothermal gradients at the location of maximum subcrustal lithospheric thinning to the west of the Mt Isa Rift may have driven the migration of basinal brines. Increased subsidence at this location produced favourable anoxic sedimentary horizons for metal precipitation during orebody formation.     

东北水稻产区土壤-作物系统锌元素生态地球化学特征

以东北主要水稻产区为研究区,以土壤-作物系统锌元素地球化学为研究对象,进行了系统的野外调查和土壤、水稻样品的采集、测试及统计分析。研究结果表明,东北水稻产区土壤表层锌含量介于11.01~94.95 mg/kg之间,平均值为43.97 mg/kg,锌含量总体处于缺乏状态;籽实锌含量介于14.27~36.92 mg/kg之间,平均值为24.70 mg/kg,样品中97.56%的籽实锌含量满足人体需要从谷物摄取到的量,品质优良;水稻籽实锌生物富集系数从高到低依次为草原风沙土、草甸土、盐渍水稻土、黑土、淹育水稻土、水稻土、暗棕壤、草甸白浆土;水稻籽实中锌元素的富集与土壤表层硼、锗、铋、镉、铅、锂、铍等元素含量呈现不同程度的显著负相关。     

铅锌富集机制实验研究方法综述

元素富集机制的研究是重现成矿过程和查明成矿机制的基础,有助于深化对矿床的认识,为找矿提供理论依据。本文总结了近年来关于铅锌元素的迁移与沉淀机制的研究及其应用,包括3种铅锌迁移沉淀模式,4种含铅锌流体驱动模式,铅锌的迁移形式及其沉淀机制;同时简述了我国高温高压实验的发展历程以及4种高温高压模拟实验方法。重点介绍了4种高温高压实验模拟方法及其研究现状：(1)高压釜实验;(2)热液金刚石压腔—激光拉曼实验;(3)熔融毛细硅管—激光拉曼实验;(4)计算机模拟实验。从封闭—平衡—静止到(半)开放—非平衡—流动、淬火分析到原位观察,应是今后高温高压实验的发展方向。以地质特征为基础,采用高温高压成岩成矿模拟实验结合计算机模拟,精细刻画成矿过程并揭示元素富集机制不仅是解决实际地质问题的有效手段,更是很长一段时间内要为之努力的方向。     

广西输电线路覆冰典型年份的环流特征分析

采用NCEP/NCAR逐月再分析资料、广西北部43个气象台站的温度、湿度、风、降水、导线覆冰等观测资料以及广西输电线路覆冰资料,建立雨凇覆冰厚度计算模型,并得出气象台站的历史覆冰厚度序列。采用数理统计和合成分析等方法研究典型覆冰年份的时空特征、环流背景及气象要素变化特征,结果发现:广西输电线路覆冰主要出现在冬季的桂北,并有逐年减轻的趋势,MannKendall突变检验表明,存在1个明显的突变点,出现在1985年;广西典型覆冰年份,500 hPa欧亚大陆中高纬地区呈明显的"两槽一脊"型,广西高空处于南支槽前,地面受冷高压脊控制;赤道中东太平洋,从夏季到秋季,海温由偏高转为偏低,到冬季SSTA维持为负距平,说明广西输电线路覆冰与LA NINA事件有较密切的关系。当日最低气温在0.2℃以下,风速5 m·s-1,并伴有雨凇和弱降水,低温寡照天气时容易出现覆冰。     

辽东玉隆铅锌矿田控矿构造特征与深部赋矿空间分析

辽东玉隆铅锌矿田处于辽吉古裂谷西端中央地带,是区域上重要的铅锌成矿带。区内含矿母岩-大石桥组三段条带状透闪白云石大理岩发育,铅锌矿床成因类型为沉积-变质热液再造矿床,控矿构造为F1次级褶皱、F2褶皱转折端和褶皱翼部剪切滑动角砾岩带。文章提出区内存在类似检德铅锌矿床"如云硐"二期向斜的大褶皱转折端,论述了玉隆至烟囱砬子至响水沟二期向斜一线距地表600～1500m空间存在铅锌矿工业矿体的地质依据。     

贵州省赫章福来厂铅锌矿矿床地质特征及找矿前景分析

福来厂铅锌矿产于江子山背斜NE翼,主要沿NW向构造产出,该矿为黔西北地区铅锌矿集区主要矿床之一,赋矿地层主要为石炭系黄龙组(C_2h),岩性为白云岩、白云质灰岩。本文通过对福来厂矿床地质特征的总结及与相邻矿区典型矿床的类比分析,认为该区找矿前景好,深部找矿潜力大,应该加大找矿力度。     

内蒙古小西沟铅锌矿床矿石特征及可选性试验研究

小西沟锌铅矿床属于低温热液型矿床,矿石组成复杂,伴生铜和银,研究表明,该矿床矿石中的铅、锌、铜和银主要矿化元素以独立矿物产出,但部分黄铜矿与闪锌矿呈固溶体交生。根据矿石性质确定,该矿床矿石可采用混合浮选铜铅(铜、铅分离)—再浮选锌的工艺流程,通过试验获得符合标准的铜精矿、铅精矿和锌精矿,所用药剂没有环境污染,符合当前技术条件,可以开发利用。