小儿血清锌的检测

1988～990年测定了肇庆市9个县10岁以下健康儿童血清微量元素锌的含量，并探讨了缺锌与健康的关系，5930例中，其正常范围在11．6～15．4μmol/L；低于正常值低限者2365例，占39．73%，缺锌与男女性别无关，缺锌与生长发育、贫血都有非常密切关系。     

Recent advancement and development of chitin and chitosan-based nanocomposite for drug delivery: Critical approach to clinical research

This review depicts the exposure of chitin and chitosan base multifunctional nanomaterial composites for promising applications in field of biomedical science structure, synthesis as well as potential application from a colossal angle. We elaborated critically each of the chitin and chitosan base nanomaterial with its potential application toward biomedical science. For different biomedical applications it use in form of hydrogels, microsphere, nanoparticles, aerogels, microsphere and in form of scaffold. Due to this it had been blended with different polymer such as starch, cellulose, alginate, lipid, hyaluronic acid, polyvinyl alcohol and caboxymethyl cellulose. In this review article, a comprehensive overview of combination of chitin and chitosan base nanomaterial with natural as well as synthetic polymers and their biomedical applications in biomedical field involving drug delivery system all the technical scientific issues have been addressed; highlighting the recent advancements.     

Pseudopotential calculations using the FSGO Method: Application to first-row hydrides

Various pseudopotential schemes are examined in floating spherical Gaussian orbital (FSGO) calculations on the first row hydrides to help determine which pseudopotential scheme, if any, would be most useful in the FSGO method.     

Growth of multicrystalline Si with controlled grain boundary configuration by the floating zone technique

The floating zone technique was employed to grow multicrystalline Si with controlled grain boundary configuration. Purposely designed bi-crystals were utilized as seed crystals to investigate the effect of the tilt angle from the perfect twin boundary on the growth behavior. When the growth was initiated from a bi-crystal with a Σ3 twin boundary, no particular change took place on the grain boundary configuration during growth. On the other hand, the decrease of the tilt angle during growth was observed when the growth was initiated from a bi-crystal with a tilted boundary from Σ3. This was accompanied by the appearance of new crystal grains. The reduction of the total interface energy would be a possible driving mechanism for this phenomenon.     

Vertical optical floating zone furnace: Principles of irradiation profile formation

The light distribution within the vertical double-ellipsoid mirror furnace applied for floating zone crystal growth with optical heating is studied. During the last few years, this setup was intensively applied for crystal growth of intermetallic and oxide materials due to its advantages for radiation focussing, which is superior in some key features compared to other commercial horizontal and vertical optical floating zone facilities. A point source model was used as a light source to reveal basic principles of the irradiation profile formation, which can strongly affect the melt flows, as well as the curvature and stability of crystallization front. Effects of the lamp displacement along the vertical optical axis with respect to the focal point of the lower elliptical mirror and the effect of mirror apertures were studied as the prime factors, which determine the light profile on the crystal. The efficiency of the light focusing in the presented optical configuration is discussed.     

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;     

铅对作业工人健康及其子代智商的影响

为了研究铅的作用,对１１６名铅作用工人做了健康检查,测定了其３１名４￣６岁子女的智商,并测定了６８名父母为非铅作业工人的儿童智商,以作对照。神经衰弱是工人最常见的症状,其次是消化系统症状。车间空气铅浓度与尿铅、尿δ－ＡＬＡ、神经衰弱有相关关系。铅作业者子女的平均智没为８４．８２,显著低于对照组的９８．３０。铅作业女子中有３２．３％的人智商≤８５,而对照组仅１１．８％,;铅作业子女中有６．５％的人智     

Sr-doping enhanced electrical transport and thermionic emission of single crystal 12CaO·7Al2O3 electride

Sr-doped single crystals (C_1-xS_x)12A7:e⁻ (x = 0, 0.01, 0.02, 0.03) were successfully fabricated by floating zone method. It is found that Sr-doping decreases the reduction time from 30 h to 20 h. The maximum emission current of (C_1-xS_x)12A7:e⁻ is greatly improved by 50% than that of the un-doped. The DFT calculations show Sr-doping in C12A7 contributed to the free O²⁻ in the cages spread out, leading to a short reduction time; increase the “window” between two adjacent cages that is conducive to the electrons in cages to escape. And the work function of the (C_1-xS_x)12A7:e⁻ is lower than that of C12A7:e⁻.     

推广使用无铅汽油对儿童血铅水平影响的研究

于１９９７年７月－９月在上海市５个区县３０所幼托机构对１９７２名１－６岁儿童进行了血铅水平抽样调查,然后于上海地区推广使用无铅汽油半年后的１９９８年４－６月相应人群进行血铅水平复查。     

高明市2389名0—6岁儿童锌,铁,铜,钙缺乏状况调查

调查了高明市２３８９名０￣６岁儿童锌、铁、铜、钙缺乏状况。结果表明，本市儿童缺锌、铜、铁和钙各为４５．９２％，６０．２０％，１３．４４％和４．６０％。讨论了缺锌、铜、铁的原因。