铜铁锌对CdS性质及Cu_2S/CdS太阳电池性能的影响

本文报道了Cu、Fe、Zn对CdS晶体半导体参数和Cu_2S/CdS太阳电池性能的影响。随着Cu、Fe、Zn浓度的增加,电阻率也增加,掺Zn使禁带宽度E_g增大,迁移率μ降低,这些参数的变化,直接使电池的I_(sc)、效率和填充因子(F)降低。在本条件下,以上三种杂质都是受主杂质。掺氧能间接增加施主杂质,对受主杂质起补偿作用。

探讨孕妇钙铁锌铜摄入量对婴儿发育质量的影响

目的探讨孕妇钙铁锌铜摄入量对婴儿发育质量的影响。方法选取2016年1~7月收治的孕晚期妇女且后期纯母乳喂养160例作为调查对象,对孕妇膳食情况进行调查,对孕妇血清及婴儿静脉血钙铁锌铜含量进行测定,以分析孕妇血清钙铁锌铜含量与婴儿静脉血钙铁锌铜含量的相关性,并对静脉血清钙、铁、锌、铜浓度与婴儿出生体重之间的关系进行探讨。结果 160例孕晚期妇女摄入的主要营养素及能量中能够达到中国营养学会推荐摄入量的只有维生素E;而蛋白质、能量、钙、铁、锌、铜的摄入量均未达标。与孕妇血清相比,婴儿静脉血清钙、铁、锌含量明显提高,而铜含量明显降低,差异均具有统计学意义(P<0.05);经对婴儿静脉血清钙铁锌含量与孕妇血清钙铁锌含量进行相关性分析,显示呈正相关,但在铜含量方面,两者无相关性。与2.5~4.0kg婴儿相比,出生体重高于4.0kg的婴儿静脉血清钙含量明显提高,而出生体重<2.5kg的婴儿静脉血清铜含量明显降低,差异均有统计学意义(P<0.05)。结论孕妇的血清钙、铁、锌、铜的含量可对婴儿的发育质量产生一定影响,为促进孕妇自身的健康及婴儿的成长,孕妇在妊娠期间应加强对营养素及能量的摄入保障。

新疆羊布拉克地区铜铁锌多金属矿成矿地质条件浅析

在新疆拜城县塔格拉克—关其特一带开展1:5万铜多金属矿远景调查,发现羊布拉克铜铁锌多金属矿(化)点一处,并对其开展了地表槽探进行揭露,初步判断成因类型属岩浆热液型多金属矿,其形成受地层、构造、岩浆岩等的控制。

用ICP-OES法测定循环冷却水中钙镁铁锌铜的含量的研究

为彰显用ICP-OES法测定循环冷却水中钙镁铁锌铜的含量探究价值,本文以实验探究的方法,着重对循环冷却水中钙镁铁锌铜的含量检测要点进行综合解析,以达到充分把握ICP-OES法测定技术优势,提升社会水资源技术开发手段的目的。

微波消解-原子吸收法测定全血中铁锌钙镁铜铅镉

目的：探索出一种快速检测全血中铁、锌、钙、镁、铜、铅和镉微量元素的方法。方法：微波消解血样，用火焰原子吸收法测定铁、锌、钙、镁和铜，石墨炉原子吸收法测定铅和镉。结果：方法的最低检测浓度分别为5．00、0．10、3．50、0．30、0．05μg／ml，5．00和0．50ng／ml。加标回收率分别为93．5％～96．0％，100．0％-105．0％，94．0％～99．0％，98．0％～99．0％，100．5％～103．0％，96．0％～102．0％和100．0％～110．0％。RSD分别为4．30％～5．24％，0．86％～1．35％。5．58％～7．14％，2．59％～3．09％，0．86％～1．04％，4．33％～7．52％和2．56％～4．77％。结论：测定方法结果满意。

锂电三元前驱体工艺设计要点控制研究

锂电池材料分为正极材料、负极材料、隔膜、电解液等,正极材料是锂电池材料的关键性材料之一,三元前驱体是生产三元正极材料的重要上游材料。在三元前驱体工艺设计中,关注重点工艺控制条件、废水处理工艺设计、铜铁锌等异物引入的防护措施、工艺智能化设计,优化设计提升产品的竞争力,推动锂电池行业的发展。

Cu-Fe-Zr 三元系统基的非铁合金

提出了微合金化铜基合金在真空条件下优选工艺和通过减少ＣｕＦｅ２Ｐ合金中Ｐ含量及用Ｚｒ、Ａｌ、Ｍｇ、Ｚｎ等对ＣｕＦｅ２Ｐ进行微合金化改善其性能．实验发现，对微合金化ＣｕＦｅ２Ｚｒ合金，高的铁锆比（Ｆｅ／Ｚｒ）与性能有良好的对应关系，而对微合金化ＣｕＦｅＺｒ合金，低的和较宽范围的Ｆｅ／Ｚｒ与性能有良好的对应关系．

火焰原子吸收分光光度法测定SD大鼠神经组织之钙镁铁锌铜

目的：建立火焰原子吸收分光光度法测定正常SD大鼠神经组织中钙、镁、铁、锌、铜的含量,并提供其正常参考值范围。方法：使用火焰原子吸收标准曲线法测定神经组织中的钙、镁、铁、锌、铜含量,并做加标回收实验。结果：正常SD大鼠神经组织中钙、镁、铁、锌、铜的含量分别为190.31±1.29、679.79±97.67、138.15±31.03、37.15±10.57、3.06±0.13μg/g,加标回收率在90%~110%之间。结论：方法操作简便,测定值稳定,结果令人满意,为相关工作人员初步提供了正常SD大鼠神经组织中钙、镁、铁、锌、铜的参考值范围。

关于锂电池正极材料及前驱体厂房内设备外壳、管道及支架材质选用方案探讨

在新能源迅速发展的形势下,锂电池拥有主导地位,同时锂电池正极材料及前驱体生产厂房也迅速发展,其厂房提出含有铜铁锌的管道、桥架、母线、箱体、设备及其各种支架严禁裸露要求,以免影响电池材料的品质。本文首先对锂电池正极材料及前驱体厂房内严禁含铜铁锌的管道及支架、箱体裸露原因进行分析,提出了厂房设计建造过程中各专业存在的问题及设计遗漏,然后提出了解决方案并分析了各个方案的优劣。

大鼠双侧坐骨神经离断后全血钙镁铁锌铜的含量变化

目的：研究大鼠坐骨神经离断后,不同时间点全血钙镁铁锌铜元素的含量变化情况,为临床周围神经损伤后相关微量元素的变化机制以及支持治疗提供依据。方法：制作大鼠双侧坐骨神经离断模型,同时设立假手术组大鼠作为对照。分别于术后12 h,24 h,48 h,4 d,8 d,采集两组大鼠全血,利用湿热消解-火焰原子吸收光谱法测定全血中钙镁铁锌铜元素的含量,对其进行两组间统计学比较。结果：大鼠坐骨神经离断后12~48 h,全血钙元素略低于对照组,至第4天较对照组显著升高两倍多,第8天又恢复正常。其余镁铁锌铜元素在术后早期12 h会有明显降低,24 h后逐渐升高。结论：大鼠坐骨神经离断伤后早期12 h,全血钙镁铁锌铜元素会有下降,24 h后基本恢复正常。在损伤后第4天全血钙元素有显著性一过性升高,其原因有待进一步研究。

Effects of copper ions on dissolution mechanism of marmatite

The dissolution mechanism of marmatite in the presence of Cu^(2+)was intensively studied by experiments and density functional theory(DFT) calculations. Leaching experiments showed that Cu^(2+)accelerated marmatite dissolution at high temperatures(above 55 ℃), but the trend was reversed at low temperatures(below 45 ℃), which may be because the reaction mechanism between Cu^(2+)and marmatite changed from surface adsorption to bulk substitution with increasing temperature. The substitution reaction caused more zinc atoms in the marmatite crystal lattice to be released and enhanced the electrochemical reactivity, while the adsorption of copper ions at low temperatures would passivate marmatite, thus inhibiting the reaction process. DFT calculations showed that the energy of the substitution reaction was more negative than that of the adsorption reaction at high temperatures, which further verified the proposed mechanism.

Chemical Associations of Heavy Metals in the Sediments near Bailonggang Sewage Discharge Outlet of Shanghai

The five chemical associations of heavy metals have been extracted continuously using the Tessier extracting method. Results show that Cu, Pb, Fe, Zn and Cr in the sediments are mainly distributed in residual fraction, while the major chemical association of Mn is carbonates. Carbonate heavy metals are converted into Fe-Mn oxides in autumn. And in the low tidal flat, after carbonates have changed into ionic heavy metals, some of the elements are transported to the overlying water. Cu, Pb, Fe and Mn have good correlations with each other, and Zn, Cr also show their similarity of chemical behavior in the sediments.

Effects of Copper and Manganese on Hemocyte Apoptosis and Antagonism of Iron and Zinc in Oreochromis niloticus

This study aimed to investigate the effects of copper and manganese on hemocyte apoptosis and the antagonism of iron and zinc in Oreochromis niloticus The heavy metal contents in fish blood and feed were determined by atomic absorption spectrophotometry, and the hemocyte apoptosis was determined by flow cytometry. A total of 360 tilapias were selected, and they were divided randomly and evenly into 12 groups. In the challenge groups, the tilapias were fed with con stant-level copper sulfate（0, 200 mg/kg） and manganese sulfate（0, 120 mg/kg）; in the antagonism groups, the tilapias were fed with constant-level zinc sulfate（20320 mg/kg） and iron sulfate（150, 350 mg/kg）. After 20-week aquaculture, the hemocyte apoptosis rates in the copper and manganese groups were significantly increased; with the increased addition levels of iron and zinc, the hemocyte apopto sis rates in the iron and zinc groups were significantly reduced, but they were stil higher than that in the control group. In conclusion, excessive copper and manganese can cause apoptosis in hemocytes of O. niloticus. However, the toxic effects of copper and manganese can be antagonized by iron and zinc.

Effects of short-term application of low-dose growth hormone on trace element metabolism and blood glucose in surgical patients

AIM： To investigate the effects of short-term application of low-dose growth hormone on trace element metabolism and blood glucose in surgical patients METHODS： A total of 48 consecutive patients undergoing abdominal operations were randomized to receive either subcutaneous rhGH （0.15 IU/kg） or placebo （menstruum） injections daily for 7 d after surgery. The two groups had similar nutrition intake. Blood, feces, urine and drain samples were collected to measure zincum, cuprum and ferrum as well as glucose levels. Accumulative intake, excretion and balance of zincum, cuprum and ferrum, apparent absorption （AA） and apparent utilization （AU） of zincum, cuprum and ferrum, blood glucose levels and adverse events were estimated. RESULTS： There were no differences in accumulative intake and drain excretion between the two groups. The feces excretion and accumulative excretion of cuprum were lower in the rhGH group （P 〈 0.05）. The urinary excretion of zincum, cuprum and ferrum was all significantly decreased in the rhGH group （P 〈 0.05） and the accumulative balance of zincum, cuprum and ferrum was improved compared with the placebo group （P 〈 0.05）. AA of cuprum in the rhGH group was almost twice as much as the placebo group （P 〈 0.05）, and AU of zincum, cuprum and ferrum was all improved in the rhGH group （P 〈 0.05）. The mean blood glucose level was significantly higher in the rhGH group than in the placebo group from d 3 to d 6 after operation （P 〈 0.05）.improves the retention of zincum, cuprum and ferrum and decreases the excretion of zincum, cuprum and ferrum, improves the balance of zincum, cuprum and ferrum, and promotes the AA and AU of zincum, cuprum and ferrum, rhGH can be well tolerated without significant adverse effects and the blood glucose level can be well controlled.

Distribution of Soil Zinc，Iron，Copper and Manganese Fractions and Its Relationship with Plant Availability

The distribution of various fractions of Zn, Fe, Cu and Mn in 15 types of sods in China and its rela-tionship with plant availability were studied. Wactions of various elements were found to have some similarcharacteristic distribution regularities in wirious types of soils, but various soil types derered to varyingdegrees in the distribution of each fraction. Soil physico-chemical properties, such as pH, CEC and thecontents of OM, CaCO_3, free Fe, free Mn and P_2O_5, were signdicantly correlated with the distribution ofelemental fractions, and a significazit correlation also existed between the distribution and plant amilabilityof elemental fractions. Varfous fractions of each element were divided into two groups bed on their plantavailability. The correlation between the distribution of combination fractions aiid plaxit availability indi-cated a significantly or an extremely significantly positive correlation for Group I but a significantly or anextremely significantly negative correlation for Group II. Therefore, the fractions in Group I were primarypools of available nutrients, while those in Group II could hardly provide available nutrients for plants. Descreasing the transformation of corresponding elements into fractions of Group 11 and increasing the storagecapacity of various fractions of Group I were an important direction for regulation and controiling of soilnutrients. However, some Particular soils with too high contents of Zn, Fe, Cu and Mn should be regulatedand controlled adversely

Spatial Differentiation of Elements in Soils on Red-Earthy Hill Landscape of Central China

Samples of 21 soil profiles and 165 top soils from an area of approximate 1.5km^2 on red-earthy hill landscape were collected and analysed.The content of Ca,Mg,K,P,Fe,Mn,Zn and Cu in soils relate with the kind of parent material and the position of topography,however,there is great variation due to the local difference of the form of soil utilization.From the difference in spatial distribution of elements content,it is believed that eight kinds of elements are lost by chemical leaching and physical translocation,meanwhile some are added (such as Ca,P,K,Mg) and some mobilized (such as Fe,Mn,Zn,Cu and P) through cultivation,fertilization and irrigation in the soils on the landscape investigated.The sectional differentiation in abundance or deficiency of elements in top soils on the landscape investigated is distinct,which is important for carrying out agricultural management and reasonable fertilization according to local conditions.