湛江地区健康儿童发中微量元素正常参考值的探讨

测定了湛江地区２５６２例１－７岁健康儿童头发中锌,铜,铁、钙含量。根据十年积累的资料,分成四个年龄组,分别进行了统计学处理。结果显示：不同年龄组发锌和发钙随着性别、地域的变化,存在着显著性差异;     

Modeling of sulfide oxidation in tailings dumps of the Kavalerovsky district and their impact on the hydrosphere (Primorsky Krai,Russia)

The results obtained in modeling of drainage waters in tailings dumps of deposits in the Kavalerovsky district in the temperature range from 0 to +45°C are reported. The Eh-pH parameters of the technogenic mineral formation systems at various rock sulfide ratios in the tailings (95: 5, 90: 10, 80: 20, and 60: 40) were determined. The crystallization of supergene minerals from micropore solutions was studied. The qualitative and quantitative ion composition of the minerals and their effect on the surface and ground waters in the district were determined.     

顺德市大良城区与顺峰山工业区800例儿童发铅分析

对大良城区及顺峰山工业区８００例０－６岁托幼儿童进行了健康检查及发铅测定。并分组对照比较。结果表明，生活在城区儿童的发铅异常占抽样的３３．５％，而生活在工业区儿童的发铅异常者则占抽样人数的４３．８％，对两组不同年龄组儿童的发铅比较发现，低年龄组儿童发铅异常显著高于高年龄组儿童。     

Rare earth elements in mine,slime, and river waters in the Kavalerovsky and Dalnegorsky districts of the Russian Far East

The concentrations of rare earth elements (REEs) in anthropogenic (mine and slime) and river waters of Kavalerovsky and Dalnegorsky districts of the Far East have been estimated. The highest concentrations of REs have been found in mine water of the Dubrovskoe deposit (Kavalerovsky district), especially in the slime waters of the old tailing dump of the Krasnorechenskaya ore-dressing plant (KODP, Dalnegorsky district). Contamination of the Rudnaya river water has been detected in the vicinity of the KODP old and new tailings dumps. Taking into account that REEs are concomitant with sulfide minerals, the former can be extracted by repeated processing of wastes from the KODP old and new tailings dumps.     

广州市芳村区240例正常婴幼儿头发中微量元素水平分析

测定了广州市芳村区２４０例正常婴幼儿头发中锌、铁、铜、钙、锰、铅、碘等７种元素的含量,并与广州婴幼儿头发元素的含量正常值进行了对照分析。结果表明,不同性别的芳村区婴幼儿头发中微量元素的含量与广州市正常值之间存在显著差异,Ｐ〈０．０１,说明芳村区婴幼儿体内微量元素的含量尚需从各种途径加以提高或控制,以促进儿童体格、智力等方面的发育。     

Investigations on the location and construction of a low background gamma-spectrometer

The underground radiation conditions in the mining district of Freiberg and in a rock salt environment of the Werra district were investigated. In a salt mine a very low natural activity level can be found. For selection of proper shielding materials a low-level -spectrometer and an optimum sample geometry must be used. The photopeak differences between sample and blank are small in most cases. Considerable differences can be found in the continuous background below 0.7 MeV.     

湖南省四市老年人头发微量元素正常值研究

对长沙等四市445例健康中、老年人的八种头发微量元素进行了测定．制定了老年期和老年前期正常值，并对地区、职业、头发染色分布进行了探讨，测定结果可作为今后老年医学研究和临床参考．     

Behavior of Sulfide Ore Elements in the Oxidation of Concentration Tailings under Cryogenic Conditions (Dalnegorsk District,Far East)

Russian Journal of General Chemistry - Oxidation processes in the sulfide component of the concentration located in the Dalnegorsk district were modeled in the range from–25 to 0°C. The...     

Disequilibrium studies using 210Po/210Pb ratio in top soil in the mineralized region of East Singhbhum,Jharkhand, India

Journal of Radioanalytical and Nuclear Chemistry - Present study evaluates distribution of 210Pb and 210Po in soil around uranium mineralized region of East Singhbhum district, Jharkhand, India....     

Marstomentosides O-T polyoxypregnane glycosides from Marsdenia tomentosa

Thirteen pregnane glycosides were isolated from fresh leaves of Marsdenia tomentosa collected in the Fukuyama district. Of these, six were glycosides previously obtained from the same plant collected in the Fukuoka district and one from another Asclepiadaceous plant. The structures of the six new glycosides were determined by spectrometric method.     

永州潇水河水源地水质现状分析及污染防治

通过对潇水河零陵区饮用水水源地的水质的检测,分析了潇水河水源地水污染现状,及造成潇水河水源地水体污染的原因,并提出了相应的水污染防治措施。     

Long-Lived Radioiodine in Japanese Environment

The amount of long-lived radioiodine, ¹²⁹I (half-life 1.57·10⁷ y) in the Japanese environment has been studied by measuring thyroids of humans and animals. The collected samples were thyroids of (1) humans in Ibaraki Prefecture, in Kanto district, the central part of Japan, (2) cattle in Aomori Prefecture, north part of Japan, and (3) wild deer in Chiba Prefecture, in Kanto district. The measured mean isotopic ratio ¹²⁹I/¹²⁷I for thyroids of cattle in Aomori Prefecture is 3.5±1.8·10^-9. A higher value of 14±5·10^-9 has been obtained for thyroids of wild deer in Kanto district. On the other hand, the measured ratio for human thyroids in Kanto district is 1±0.2·10^-9. This value is significantly lower than that of cattle thyroids in Aomori and also those reported for human thyroids in Europe and USA. The higher mean ratio for cattle thyroid in Kanto district is possibly explained by the influence of nuclear reprocessing plant. Lower mean ratio for human thyroid might be due to higher dietary intake of algae.     

神农架地区五味子科植物成分的研究 II: 五味子酯F的分离与结构研究

从湖北房县中坝采集的南五味子(Kadsura sp. 种名待定)根中, 分得四个新化合物. 本文报道其中之一—五味子酯F(schisantherin F)的分离与结构研究以及在结构研究过程中获得的十一个衍生物的制备方法和理化数据.     

青海湖区沙柳河谷典型植物重金属含量特征

对青海湖地区沙柳河下游地区14种典型植物，采用AAS进行了As、Sb、Pb、Cd、Ni、Co、Cr、Se等8种重金属元素含量的分析。结果表明，元素Cr的平均含量最高，但含量范围变化不大，而Co和As的含量在不同植物中含量相差很大。     

Composition of the essential oil ofLarix sibirica

The composition of the essential oil isolated under production conditions from the woody verdure ofLarix sibirica Lbd. growing in the Krasnoyarsk district has been studied. The bulk of the essential oil is composed of monoterpenes (84.95%). Among the sesquiterpene hydrocarbons α-murolene, β-humulene, and caryophyllene are present in considerable amounts. The sesquiterpene alcohol δ-cadinol has been detected. α-Murolene, γ-murolene, and longifolene have been isolated from the essential oil in the chromatographically pure state by column and preparative thin-layer chromatography.     

A rapid method for the separation of radium from Tuwa spring waters for determining the activity ratio of223Ra/226Ra

A rapid method for the separation of radium in spring waters of Tuwa, Panchamahal district, Gujarat State, India, containing large amounts of calcium (0.5 g/l) has been developed. It consists of concentrating polyvalent cations from 21 samples using 10 g of carboxylate exchanger, Zeokarb 226 (NH ₄ ⁺ ) and then precipitating radium as sulfate in the presence of 400 μg of barium.     

神农架地区五味子科植物成分的研究 III: 五味子酯G,H和I的分离与结构研究

本文继续报道从湖北房县中坝采集的一种南五味子(Kadsura sp.种名待定)根中分得的另外三个木脂素类新化合物: 五味子酯(schisantherin)G, H, I和六个已知物:schizandronic acid, isoschizandrolie acid, kadsurarin, veraguensin, β-谷甾醇和硬脂酸的分离, 鉴定与结构研究. 同时报道在结构研究中获得的八个衍生物的理化数据以及kadsurarin(1a)的绝对构型.     

成都市大气颗粒物的特性研究

以成都市东区为研究区域，研究了该区总悬浮颗粒物（哪）含量及其中重金属的含量随季节变化的特征，通过粉煤灰与哪中重金属含量的关系、富集因子分析来判断颗粒物中重金属的来源。研究表明，TSP及其中重金属的含量随季节变化明显且特征相似；哪的含量严重超标；由监测结果大致推断出了该区域哪及其中重金属的主要来源。     

城市灰尘的元素地球化学特征

根据湖州市吴兴区采样数据,分析了城市灰尘元素中亲铁元素、亲铜元素、亲石元素和常量元素的含量和累积状况,并探讨这些元素与土壤背景的关系.结果表明,湖州市城市灰尘四类元素含量差异较大,但与土壤背景变化趋势基本一致;同种元素在不同功能区的富集等级基本相同,但同类元素间存在明显的累积差异;各功能区灰尘元素与土壤背景的关联度都较...     

广州市芳村区297例正常婴幼儿头发中6种元素的含量及水平分析

报道了广州市芳村区２９７例正常婴幼儿头发中锌、铁、铜、钙、锰、铅的含量水平。