黑龙江省金龙达经贸有限责任公司

公司成立2002年,公司位于哈尔滨市南岗区中山路258号,企业类型为有限责任公司,经营范围：购销冶金矿产品,冶金炉料,焦炭,生铁,铁合金,金属材料,钢材,有色金属不含稀有金属,化工产品不含危险品,剧毒品,建筑材料,机械设备,炭素材料及石墨制品。     

Study on photodegradation of Azo dye by polyoxometalates/polyvinyl alcohol

A series of photocatalysts, K11[Ln(PW11O39)2]/PVA (Ln=La, Ce, Pr, Nd, Sm) were prepared by K11[Ln(PW11O39)2] (Ln=La, Ce, Pr,Nd, Sm) containing five kinds of lanthanides and polyvinyl alcohol as the support. The catalysts obtained were characterized by Fourier trans-form infrared spectra, UV-vis spectra, powder X-ray diffraction, and scanning electron microscopy, indicating that the structure of K11[Ln(PW11O39)2] and polyvinyl alcohol remained intact, respectively. The photocatalysts exhibited efficient catalytic activity to degrade methyl orange, Congo Red, Ponceau 2R. The maximal degradation conversions of the three kinds of dyes were 99.58%, 47.61%, 72.42%, respectively.     

家长义工：香港校园别样的景致

在香港校园里,常常有这么一群特殊的人,她们每天早早地来到学校,为学生测量体温,观摩学校早会,协助管理图书,课余为学生讲故事,中午帮学生盛饭,甚至为学校编辑刊物,放学为低年级学生辅导作业……俨然是学校的正式教师,其实是学生家长,她们为学校,帮老师做了很多事情,都是义务的,没有任何报酬,在香港,通常把她们称之为“家长义工”。     

Mn(Ⅱ)-EDTA电位滴定铜的催化指示电极及其应用研究

提出了在氨三乙酸(NTA,活化剂)存在下,以Mn(Ⅱ)催化NaIO4氧化结晶紫的反应指示滴定终点,以自制的结晶紫选择性电极为指示电极,Mn(Ⅱ)为滴定剂,EDTA为阻抑剂,催化滴定测定微量铜的新方法.该方法对试剂用量,酸度,温度,滴定剂浓度,滴定速度及干扰消除等进行了探讨,选择了适宜的实验条件.用于火药中微量铜的测定,样品平均回收率为98.17%,相对标准偏差为1.02%,结果与原子吸收光谱法测定结果相符.     

铅市分析

11月份以来,LME三个期铅价基本上单边下行,跌至近1150美元,接近10月下旬低点。后市走向,初步分析如下:利空因素:宏观经济陷入收缩或衰退,对铅消费影响最大的汽车行业,同样面临危机。铅消费需求毫无疑问已处于衰减之中。供应来看,一是冶炼厂,中国10月份同比增产21.17%,且从本公司铅精矿进口贸易来看,原料供应充足,因此,近期大量减产的可能性不大。二是近期库存,LME库存持续减少,目前仅4万吨多点,但中国有大量商业库存,且LME库存低的主要原因也是中国出口近零水平所致。     

江西铜业：期待矿铜产出

业绩略低于预期第三季度公司实现营业收入1471394万元,同比上涨30.67%,净利润91950万元,同比下降26.9%,每股收益0.30元,前三季度实现营业收入4154476万元,同比上涨45.46%,净利润369876万元,同比增长13.76%,每股收益1.22元,业绩略低于市场的普遍预期。     

火焰原子吸收光谱法测定高纯金锭中铜、银、铁、铅、铋、锑

提出了用火焰原子吸收光谱法测定金锭中Cu,Ag,Fe,Pb,Bi,Sb的方法。用乙酸乙脂萃取分离金,水相浓缩后测定6种待测元素,方法的检出限:Cu,Ag,Fe为0.021mg/L,Pb,Bi,Sb为0.24mg/L;回收率94%～106%;RSD小于10.6%。该方法快速、简便,样品用量少,测定结果与ICP AES法和国家标准方法一致。     

人物介绍

中国共产党优秀党员,中国工程院资深院士,国家一级教授,中南大学学术顾问,中国粉末冶金学科奠基人,原中南矿冶学院副院长,原湖南省科协主席,国际著名的材料科学及冶金学家、教育家黄培云同志因病医治无效,于2012年2月6日10时10分在长沙     

理事 张松江

张松江,男,1964年11月生,中共党员,大学本科,冶金高级工程师,铝电解高级技师,现任河南中孚实业股份有限公司副总经理。     

荧光光谱仪在型铁分析中的应用

型铁中Ｓｉ,Ｍｎ,Ｐ,Ｓ四大元素的测定是型铁质量评价的主要内容。以往化学法分析Ｓｉ,Ｍｎ,Ｐ,Ｓ四大元素,劳动强度大,工序繁琐,偶然误差因素多,分析周期长,准确度低。近年来,Ｘ射线荧光光谱仪在冶金、地矿、水泥等分析应用方面,得到迅速发展,它具有自动化程度高,操作简单、快速、准确、非破坏性等优点,本文应用３５３０荧光光谱仪,分析型铁中的Ｓｉ,Ｍｎ,Ｐ,Ｓ四大元素,取得了成功,方法简单、准确、快速。１实验部分１.１仪器和试剂３５３０Ｘ射线荧光光谱仪（日本理学）,Ｒｈ靶,端窗Ｘ射线管;ＰＲ—１０气体;…     

Bacteriophage diversity in the North Sea

In recent years interest in bacteriophages in aquatic environments has increased. Electron microscopy studies have revealed high numbers of phage particles (10(4) to 10(7) particles per ml) in the marine environment. However, the ecological role of these bacteriophages is still unknown, and the role of the phages in the control of bacterioplankton by lysis and the potential for gene transfer are disputed. Even the basic questions of the genetic relationships of the phages and the diversity of phage-host systems in aquatic environments have not been answered. We investigated the diversity of 22 phage-host systems after 85 phages were collected at one station near a German island, Helgoland, located in the North Sea. The relationships among the phages were determined by electron microscopy, DNA-DNA hybridization, and host range studies. On the basis of morphology, 11 phages were assigned to the virus family Myoviridae, 7 phages were assigned to the family Siphoviridae, and 4 phages were assigned to the family Podoviridae. DNA-DNA hybridization confirmed that there was no DNA homology between phages belonging to different families. We found that the 22 marine bacteriophages belonged to 13 different species. The host bacteria were differentiated by morphological and physiological tests and by 16S ribosomal DNA sequencing. All of the bacteria were gram negative, facultatively anaerobic, motile, and coccoid. The 16S rRNA sequences of the bacteria exhibited high levels of similarity (98 to 99%) with the sequences of organisms belonging to the genus Pseudoalteromonas, which belongs to the gamma subdivision of the class Proteobacteria.