Xem 1-20 trên 257 kết quả Heavy metals
  • Characterizing the nature of heavy metal release reactions, sorption mechanisms, and movement in the soil is the main topic of this book. Because soils are heterogeneous, heavy metals in soils can be involved in a series of complex chemical and biological interactions including oxidation-reduction, precipitation and dissolution, volatilization, and surface and solution phase complexation. The heterogeneous nature of the different soil constituents adds to the complexity of interactions of heavy metal species with the soil environment....

    pdf0p 951628473 07-05-2012 61 22   Download

  • Cadmium is a heavy metal and a pollutant that can be found in large quantities in the environment from industrial waste. Its toxicity for living organisms could arise from its ability to alter thiol-containing cellular com-ponents. Glutathione is an abundant tripeptide (c-Glu-Cys-Gly) that is described as the first line of defence against cadmium in many cell types.

    pdf11p mobifone23 08-01-2013 17 2   Download

  • Selective fractionation was applied to partition of heavy metals in river sediment of the rivers Nhue and Tolich Hanoi’s outskirts. The observed results showed a considerable difference of the proportion of various fractions of studied heavy metals. The residual fraction of Cu, Pb, Zn, Cd, Cr, and Ni stayed the highest portions. The portions/percentages of Cu, Pb, Zn, Cd as carbonate fractions were comparatively higher than those as Fe-Mn oxide fractions and organic fractions.

    pdf6p uocvong04 24-09-2015 4 2   Download

  • Our global environment now consists of numerous natural and artificial metals. Metals have played a critical role in industrial development and technological advances. Most metals are not destroyed; indeed, they are accumulating at an accelerated pace, due to the ever-growing demands of modern society. A fine balance must be maintained between metals in the environment and human health. It is with this view in mind that this book has been written to address diverse issues surrounding heavy metals in the environment.

    pdf682p crazy_sms 10-05-2012 87 51   Download

  • Nu metal (nu-metal, còn gọi là aggro metal, hay nü metal theo truyền thống dùng dấu umlaut cho các tên heavy metal) là một thể loại âm nhạc khởi nguyên từ giữa thập niên 1990. Nó chịu ảnh hưởng chung từ grunge và alternative metal của đầu thập niên 1990 với hip hop, nhạc điện tử và một vài thể loại nhạc metal khác, nhiều nhất là thrash metal và groove metal . Dòng nhạc này phổ biến nhất vào cuối thập niên 1990, đầu những năm 2000....

    doc3p truongthinh 09-10-2009 282 48   Download

  • This volume aims at providing a coherent presentation of recent developments and understanding of heavy metal reactivity in soils. Such an understanding is necessary in addressing heavy metals concerns in the environment. The implicit framework of multiple reactivity acknowledges the widely known role played by the various colloidal surface functional groups in concomitant reactions. This overarching frame of reference allows unification between molecular structure-reactivity relationships at one scale and transport processes at the other....

    pdf0p crazy_sms 10-05-2012 38 17   Download

  • Heavy Metal Độ hòa tan và Giao thông vận tải trong đất bị ô nhiễm do khai thác mỏ và Smelting Khai thác mỏ kim loại, luyện kim, chế biến trên toàn thế giới đã bị ô nhiễm đất với các kim loại nặng trong vượt quá nồng độ nền đất tự nhiên. Các quá trình này giới thiệu các chất ô nhiễm kim loại vào môi trường thông qua phát thải khí và hạt, chất lỏng thải và chất thải rắn (Dudka và Adriano, năm 1997).

    pdf19p bengoan741 23-12-2011 41 11   Download

  • Toxic heavy metals, i.e. copper (II), lead (II) and cadmium (II), can be removed from water by metallurgical solid wastes, i.e. bauxite waste red muds and coal fly ashes acting as sorbents. These heavy-metal-loaded solid wastes may then be solidified by adding cement to a durable concrete mass assuring their safe disposal. Thus, toxic metals in water have been removed by sorption on to inexpensive solid waste materials as a preliminary operation of ultimate fixation. Metal uptake (sorption) and release (desorption) have been investigated by thermostatic batch experiments.

    pdf11p tudoia 06-04-2011 39 6   Download

  • Pot and field trials were carried out using sediment dredged from the port of Bremen (Germany) and deposited in a settling basin near Bremen; the sediment is polluted with Cd and Zn. Five iron-bearing materials were added to the soil (1% pure Fe in soil dry matter) to immobilize the heavy metals: ‘Red mud from the aluminium industry, sludge from drinking-water treatment, bog iron ore, unused steel shot and steel shot waste.

    pdf8p tudoia 06-04-2011 36 6   Download

  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: A survey of forest pollution with heavy metals in the Natural Forest Region (NFR) Moravskoslezské Beskydy with particular attention to Jablunkov Pass...

    pdf9p toshiba4 13-09-2011 28 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài:The role of interleukin-12 in the heavy metal-elicited immunomodulation: relevance of various evaluation methods

    pdf14p panasonic09 13-01-2012 30 3   Download

  • Tuyển tập các báo cáo nghiên cứu khoa học ngành y học tạp chí Medical Sciences dành cho các bạn sinh viên ngành y tham khảo đề tài: Trace Elements, Heavy Metals and Vitamin Levels in Patients with Coronary Artery Disease....

    pdf5p thulanh9 07-10-2011 11 2   Download

  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Serum heavy metals and hemoglobin related compounds in Saudi Arabia firefighters

    pdf6p panasonic10 13-01-2012 14 2   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Synthesis and Electrochemical Sensing Toward Heavy Metals of Bunch-like Bismuth Nanostructures

    pdf5p dauphong17 21-02-2012 14 2   Download

  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Heavy metal exposure reverses genetic resistance to Chlamydia-induced arthritis...

    pdf10p thulanh11 11-10-2011 15 1   Download

  • The mechanism of ATP hydrolysis of a shortened variant of the heavy metal-translocating P-type ATPase CopB ofSulfolobus solfataricus was studied. The catalytic fragment, named CopB-B, comprises the nucleotide binding and phosphorylation domains. We demonstrated stoichiometric high-affinity binding of one nucleotide to the protein (Kdiss 1–20lm). Mg is not necessary for nucleotide association but is essential for the phospha-tase activity.

    pdf15p viettel02 20-02-2013 10 1   Download

  • Monitoring the environment for metals has become a topic of considerable importance, not only to those industries emitting heavy metals but also to surveillance agencies and other organizations assessing the impact of metals on the environment. Our goal is to provide a comprehensive and easyto- read text for anyone working in the environmental analytical chemistry arena and to provide essential information to consultants and regulators about analytical and quality control procedures helpful in their evaluation and decision-making procedures.

    pdf360p 951628473 07-05-2012 67 43   Download

  • Plant response to reduced water availability and other abiotic stress (e.g. metals) have been analysed through changes in water absorption and transport mechanisms and also by molecular and genetic approach. A relatively new aspects of fruit nutrition are presented in order to provide the basis for the improvement of some fruit quality traits. The involvement of hormones, nutritional and proteomic plant profiles together with some structure/function of sexual components have also been addressed.

    pdf398p conquynho32 14-09-2012 60 24   Download

  • Written by a multidisciplinary group of scientists from around the globe Environmental Restoration of Metals-Contaminated Soils provides a summary of the current environmental remediation technology.

    pdf291p 951628473 04-05-2012 59 22   Download

  • Permanganate may be applied to sites as either potassium permanganate (KMnO4) or sodium permanganate (NaMnO4). Where cost dominates over engineering factors at a site, potassium permanganate is the preferred chemical form because it is more widely available, less costly, and is available in solid form, which facilitates transport and handling. Where other factors are more important, the liquid form of sodium permangante is preferable.

    pdf52p cao_can 29-12-2012 48 20   Download

Đồng bộ tài khoản