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氟元素与人体健康 总被引:5,自引:0,他引:5
罗媛 《广东微量元素科学》2002,9(11):21-23
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。 相似文献
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铝元素与人体健康关系的研究新进展 总被引:11,自引:1,他引:11
铝元素对人体健康的影响是多方面的。本文根据近年的国内外文献报道,概述了铝元素与人体健康关系的研究进展,包括体外实验、动物实验及临床观察。 相似文献
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根据元素平衡理论指出,影响人体健康的主要因素是微量元素平衡失调。正确认识微量元素在人体内的作用,知道人体的各种疾病都与人体内的元素平衡失调有关,通过检测血液和头发相关微量元素的含量,可知道体内元素是否平衡,实现治病效果,做好防病治病的工作,提高人类健康水平。 相似文献
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研究了红壤不同利利用方式对铝的活性和形态的影响。结果表明:四种活性铝的提取剂对土壤中铝的提取力顺序一般为0.5mol/LNaOH>1mol/LHCl>1mol/LNH4Ac>1mol/LKCl。土壤中水溶性铝含量对土壤酸度十分敏感。 相似文献
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铝在阿尔茨海默氏病和帕金森氏病及透析病发病中的毒性及减轻铝负荷的药物研究进展 总被引:6,自引:0,他引:6
本文综述了近年来铝在阿尔茨海默氏病和帕金森氏病及透析脑、骨及血病发病中的毒性及减轻人体铝负荷的药物研究的进展。介绍了该类病的病理学及病源学的研究成果。减轻铝负荷的药物主要涉及了去铁胺、羟基吡啶酮、儿茶酚类、肌醇或其衍生物等铝的螫合剂。讨论了血中铁转移蛋白在铝的存储及传输中的作用。 相似文献
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本文综述了近年来铝在阿尔茨海默氏病和帕金森氏病及透析脑、骨及血病发病中的毒性及减轻人体铝负荷的药物研究的进展。介绍了该类病的病理学及病源学的研究成果。减轻铝负荷的药物主要涉及了去铁胺、羟基吡啶酮、儿茶酚类、肌醇或其衍生物等铝的螫合剂。讨论了血中铁转移蛋白在铝的存储及传输中的作用。 相似文献
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通过对测定条件的优化,采用高钒系列标准样品建立分析程序,完成类型标准化,校验后再进行测定,建立了火花直读光谱法对铝及铝合金中的钒含量进行测定的方法。选用E2235高钒标准样品进行标准化,所得测定值与标准值基本一致,相对标准偏差为2.9%(n=8)。结果表明,当测定元素含量不超过0.020%时,方法准确、可靠,适合于铝及铝合金中微量钒含量的测定。 相似文献
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H. Moselhy J. Madarász G. Pokol S. Gál E. Pungor 《Journal of Thermal Analysis and Calorimetry》1994,41(1):25-35
Three different calculation methods of deriving kinetic parameters (activation energy and preexponential factor) from dynamic TG data have been applied for the sulphate decomposition stage of the aluminum sulphate octadecahydrate. The constant rate experiments were carried out by Derivatograph and DuPont thermobalances. The three parameters estimation methods included a simple differential method, the classical Coats-Redfern and a new direct integral method. The fits of the curves obtained by these procedures were compared both graphically and numerically. It was found that the direct integral method gave the most satisfactory results. With the order type reaction models this method in each case produced the smallest residual deviation values and the best fitting curves compared to those obtained by the other two methods. The activation parameters calculated by the differential method were not acceptable at all, for the estimated curves were very far from the measured ones. 相似文献
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Christopher Exley James Beardmore Gordon Rugg 《International journal of quantum chemistry》2007,107(2):275-278
Aluminum has no known function in biota and, when biologically available, is inimical to life. A key to understanding its potential toxicity in humans is its transport in blood. A consensus of opinion has identified the binding of aluminum by the iron‐transport protein transferrin as the preeminent factor in the transport of aluminum in blood, although this idea has emanated from in vitro analysis of isolated blood and has never been tested in vivo. We have highlighted what we believe to be inadequacies of our present understanding of aluminum transport in blood, and we have proposed the application of computational methods to test rigorously what we have coined “the blood‐aluminum problem.” © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2007 相似文献
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通过数字实验对Al2(SO4)3溶液与NaOH反应过程中pH的变化进行探究,得出pH与NaOH溶液的体积(V)之间的变化曲线,从而建立铝盐与NaOH溶液反应时,Al(OH)3沉淀的生成与溶解和NaOH量的变化关系。此研究可以改变人们在Al(OH)3两性认识上存在的误区,对中学化学教学起到积极的作用。 相似文献
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Aluminum titanate was in-situ synthesized by using industrial waste-residue in the aluminum factory and TiO2 as the main raw materials and the influence of different reaction temperatures on the purity and microstructures of synthesized products were mainly discussed. The obtained Al2TiO5 was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and relevant analytical software. The results show that elevating the sintering temperature can increase the content of aluminum titanate; and at 1420 ℃, it reaches the highest in the synthesized ceramic. When the sintering temperature continues to increase, the produced aluminum titanate will decompose resulting in the drop of its content. Therefore, the optimum sintering temperature of in-situ synthesis of aluminum titanate is determined as 1420 ℃, at which the grains of aluminum titanate grow completely, the purity of aluminum titanate is 89.3wt%., the highest density is 2.75 g/cm^3, and the porosity is 9%. 相似文献