南瓜与人体健康

南瓜是葫芦科南瓜属的一年生蔓性草本植物,它营养成分全面而独特。阐述了南瓜的营养成分及其对人体健康所起的作用。     

钙在人体中的平衡与健康

钙是人体必不可少的化学元素,它在人体内的平衡若被破坏,则会影响骨骼、牙齿的发育和结构,并会导致相关的四十多种疾病。     

镁与人体健康

论述了镁在人体中的作用和缺乏症状，研究了人体补充镁的途径，以及医用镁化合物在人体健康中的应用。     

叶酸与人体健康

叶酸(folicacid)是水溶性维生素的一种,在生物体内有着非常重要的生理作用。本文简介了叶酸的物理及化学性质,在食物和人体中的分布,以及与人体健康的关系。     

钼与健康

(1)营养性钼缺乏:钼缺乏并不发生于正常生活的人群中。长期接受完全性胃肠外营养者可致钼缺乏。患者出现心动过速、头疼、精神障碍和昏迷等症状。检测可见血清和尿中尿酸水平低下,尿中无机硫酸盐降低。(2)钼具有抑制肿瘤作用:动物实验显示,钼酸钠和钼酸铵可抑制食管癌和前胃鳞癌。钼酸钠还能抑制乳腺     

铬与人体健康

介绍了铬的生理功能,指出三价铬是人体必需的微量元素,六价铬则是严重危害人体健康的有害元素,必须适量补铬和严防六价铬的中毒,才能维持人体健康。     

地质环境与人体健康

地质环境与人体健康朱琰（浙江省地质环境监测总站，杭州３１００１２）自古以来人们在生产和生活中就意识到地球化学环境与人类健康和疾病间的重要关系。远在两千年前我国的《黄帝内经》一书就提出了“天人相应”的道理。古希腊医学家希波克拉底也在自己的著作《论空气、...     

人体健康与营养平衡

介绍了人体健康与营养平衡的关系和如何做到营养平衡。指出只有保持营养平衡，才能保证健康长寿。     

微量元素硒与人体健康

微量元素硒与人体健康楼小红，吴巧凤（浙江中医学院，杭州３１０００９）自１９５７年Ｓｃｈｗａｒ发现Ｓｅ可以防止肝坏死，并能促进人和动物体生长，把Ｓｅ列为人体必需微量元素后，近三十多年来，随着物理、化学分析测试手段的进步，使生物样品中微量无机成分的测试成...     

微量元素硒与人体健康

综述了硒与人体健康的关系,包括：硒与心血管疾病、硒与肿瘤、硒与抗衰老、硒与免疫、硒与肝炎等的关系。     

必需微量元素与人体健康

人的躯体与各内脏都是由多种化学元素组成的，人体现已检出81种元素，其中有14种是人体必需微量元素。微量元素与人体健康密切相关。本文阐述了必需微量元素在人体内的生理功能，同时简述了必需微量元素的来源、微量元素间的相互作用以及必需微量元素缺乏或过量对人体产生的影响。     

氟元素与人体健康

氟元素是人体必需微量元素，在人体内主要分布于骨骼和牙齿中。氟通过各种途径对人体发生作用。人体内少量的氟对于生长发育，骨骼代谢等有一定的影响，而含氟量过量或过少会引起某些疾病，并且氟的特性对于人体健康也有影响。     

碘、氟、硅与人体健康的关系

碘、氟、硅是人体必需微量元素,它们的摄入量对人体健康起着重要作用。对碘、氟、硅的缺乏与疾病之间的关系进行了讨论,并对其治疗和防治方法作了介绍。     

饮用水与人体健康

随着人类社会的进步，经济的发展，生活水平的提高，喝什么样的水有益健康逐步成为人们越来越关心的问题。将我国《生活饮用水卫生标准》与世界卫生组织的《饮用水水质准则》比较，卫生学指标的要求大体相同。有毒有害物质的指标要求大体相同。矿泉水和城市自来水是首选的健康饮水。     

Determination of Molybdenum in Human Urine by Spectrophotometric Method using Thiazolylazo Compounds as Chromogenic Reagents

ABSTRACT

Four azo compounds based on diazotization of 2-aminobenzothiazole have been synthesized and characterized by elemental analysis as well as different spectroscopic techniques. The potentiality of the prepared compounds as new chromogenic reagents for the spectrophotometric determination of Mo⁶⁺ was studied by extensive investigation of optimum conditions favouring the formation of the coloured complexes. Beers law is obeyed in the concentration range 0.2-8.5 μg ml^?1 whereas Ringbom optimum concentration range was 0.8-7.5 μg ml^?1. The detection limit was 0.05 μg ml^?1. The molar absorptivity and Sandell sensitivity of the formed complexes are calculated. The effect of interfering ions on the determination of Mo⁶⁺ was investigated. The relative standard deviations for six replicate determinations of 5.0 μg ml^?1 of Mo⁶⁺ are 1.23, 1.47, 1.05 and 1.38 % using reagents I, II, III and IV, respectively. The proposed method has been applied to investigate the amount of Mo⁶⁺ in human urine samples. The molybdenum levels found between 0.5-2.1 μg/100 ml.     

大豆异黄酮与人体健康

大豆异黄酮是一种近年来引起营养与医学界广泛关注的物质,它对于人体健康有着重要的作用,可以有效地防治癌症、心血管疾病,抵抗骨质疏松症、妇女更年期综合症等疾病,因而越来越受到人们的重视。本文介绍了大豆异黄酮的结构、对人体健康的影响以及它的利用前景。     

A Cheminformatics Study Regarding the Human Health Risks Assessment of the Stereoisomers of Difenoconazole

Difenoconazole is a chemical entity containing two chiral centers and having four stereoisomers: (2R,4R)-, (2R,4S)-, (2S,4R)- and (2S,4S)-difenoconazole, the marketed product containing a mixture of these isomers. Residues of difenoconazole have been identified in many agricultural products and drinking water. A computational approach has been used to evaluate the toxicological effects of the difenoconazole stereoisomers on humans. It integrates predictions of absorption, distribution, metabolism, excretion and toxicity (ADMET) profiles, prediction of metabolism sites, and assessment of the interactions of the difenoconazole stereoisomers with human cytochromes, nuclear receptors and plasma proteins by molecular docking. Several toxicological effects have been identified for all the difenoconazole stereoisomers: high plasma protein binding, inhibition of cytochromes, possible hepatotoxicity, neurotoxicity, mutagenicity, skin sensitization potential, moderate potential to produce endocrine disrupting effects. There were small differences in the predicted probabilities of producing various biological effects between the distinct stereoisomers of difenoconazole. Furthermore, there were significant differences between the interacting energies of the difenoconazole stereoisomers with plasma proteins and human cytochromes, the spectra of the hydrogen bonds and aromatic donor–acceptor interactions being quite distinct. Some distinguishing results have been obtained for the (2S,4S)-difenoconazole: it registered the highest value for clearance, exposed reasonable probabilities to produce cardiotoxicity and carcinogenicity and negatively affected numerous nuclear receptors.