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  • Determination Of Trace Metals In Various Environmental Samples

    Determination Of Trace Metals In Various Environmental Samples

    6609 RUB
    The role of metals in the metabolism, maintenance of biological system, steel preparation and pharmaceutical preparation has been recognized for many decades. Pollution due to toxic metals is considered to be of immense importance due to the non-biodegradable nature and long biological half lives.Exposure to very low concentrations of metals like Pb, Se, Cu, Co, Zn, Ni and Cd may produce adverse effects on health and behavior of population. Although metals such as copper, nickel, selenium, cobalt, chromium, cadmium and zinc are essential for human beings, chronic metabolic disturbances may result from excess or deficiency of these metals.Therefore, the knowledge on the role of metals and their presence in biological systems has been the principal target of many a research study in the past and is still continuing. Hence, the continuous research on the study of metals of biological samples, pharmaceutical preparation and steel preparation is conducted to fulfill the lacunae if any, existing in the earlier studies. Hence the author has taken up research in this field and selected the topic “Determination of trace metals(Se, Cr, Co, Cu, Ni, Cd and Zn) in various environmental samples"
  • Concentrations of some trace metals in water, sediments & 2 cyprinidae

    Concentrations of some trace metals in water, sediments & 2 cyprinidae

    3430 RUB
    The present study was conducted during the period from January 2010 to December 2010 in south sector of Main out full drain, Nassiriya. Three stations were fixed to achieve the study. The concentration of eight trace metals (cadmium, cobalt, copper, iron, manganese, nickel, lead and zinc) were measured in dissolved and particulate phases of water, exchangeable and residual phases of the sediment and tissues (gills, liver, gut, muscle, ovary and kidney) of two important commercial species of fish Cyprinus carpio L. and Barbus luteus L. In addition, the concentrations of these metals in blood samples of some citizens of study area were measured.The TMs concentration in the particles phase are much more than the dissolved phase.The TMs concentration in the residual phase are much more than the exchangeable phase expect Cd, Pb metals can be attributed to anthropogenic sources.Although fish are particularly good indicators of TMs pollution, it is clear that the different species have different affinities for certain metals, also fish tissues have different affinities for certain trace metals even in the same species.
  • Graham: Slow ?sand? Filtration – Recent Developmen Ts  In Water Treatment Technology

    Graham: Slow ?sand? Filtration – Recent Developmen Ts In Water Treatment Technology

    5225 RUB
    Graham: Slow ?sand? Filtration – Recent Developmen Ts In Water Treatment Technology
  • Trace Elements in Urolithiasis

    Trace Elements in Urolithiasis

    5735 RUB
    Trace elements play an important role in the complex metabolic pathways in human system and their deficiency or in excess may cause disease. Many people all over the world including Pakistan are suffering from urolithiasis i.e. a disease related to urinary stones. The aim of this research study was to develop methods for calibrating the laboratory made standard of urinary calculi, blood and urine against which element were estimated and to see their role in urolithiasis. The work was carried out in such a way so as to classify the estimation of elements in patients and healthy persons.A further classification was also be made taking into consideration the age, sex, diet, water etc. These group were formed after acquiring sufficient data obtained from the survey work. A selected area of Karachi population was taken up in this study.The results were interpreted with respect to the correlation among the trace elements and the effect of each element in urolithiasis.This book which is based on a research study conducted in Karachi, Pakistan would be helpful to the researchers, students, pathologist and medical doctors for the treatment of this disease.
  • Investigation of Trace Elements, Ig's & Vit-C Level in drug abuser

    Investigation of Trace Elements, Ig's & Vit-C Level in drug abuser

    4763 RUB
    Present study investigates the serum levels of trace elements, immunoglobulins and vitamin C in drug addict patients before and after clinical intervention. In this study 10 ml of blood was collected from each of the drug abuse patients during admission and after 1 month of treatment and from each of the control subjects. Samples were then analyzed for determining the serum level of trace elements (Cu, Zn, Fe & Mg), immunoglobulins (IgG, IgA & IgM) & Vitamin C using atomic absorption spectroscopy, turbidimetry method and UV-spectroscopic method respectively. A higher serum Cu level (1.099±0.235 mg/L) in drug abusers than the control group (0.914±0.128 mg/L) was found. The decreased serum Fe level (0.980±0.232 mg/L) of drug abuser was increased to 1.029±0.225 mg/L after intervention. The increased serum Mg level (19.922 mg/L) of drug abusers was decreased to 19.237 mg/L after intervention. The serum concentrations of IgA (252.374±62.262 mg/dl) and IgM (149.935±57.617 mg/dl) were found higher in drug abuser patients than the control group. The concentration of vitamin C was decreased after treatment from 0.527±0.208 mg/dl to 0.510±0.318 mg/dl which was not significant.
  • Shifting Lines in the Sand – Kuwait?s Elusive Frontier with Iraq (Cobe)

    Shifting Lines in the Sand – Kuwait?s Elusive Frontier with Iraq (Cobe)

    5683 RUB
    Shifting Lines in the Sand – Kuwait?s Elusive Frontier with Iraq (Cobe)
  • Trace Elements and Isotopic Analysis of Natural Samples

    Trace Elements and Isotopic Analysis of Natural Samples

    6308 RUB
    Laser Ablation attached to inductively coupled plasma mass spectrometry (LA-ICP-MS) is widely accepted as a rapid and sensitive technique for trace element analysis of solid materials. Three different instruments are used: 1- a-The double focusing ICP-MS (JMS-PLASMAX2) is used for the analysis of rare earth elements in minerals as (monazite), and for rocks as (standard samples BCR-2, AGV-2), Also lead and strontium isotope ratios in tourmaline sample solution. b- A quadrupole (ELAN6000, Perkin Elmer) mass spectrometer. It was applied for the analysis of single grains of tourmaline sample for Sr and Pb isotope ratios and fused pellets for trace elements composition for different samples 2- Energy dispersive Scanning Electron microscope used for the analysis of zircon fused pellets and single grains. Rutherford back scattering spectrometer for the analysis of zircon fused pellets to ensure the homogeneity of the fused pellets, and LA-HR-ICP-MS (PLASMAX2) for trace elements in zircon fused pellets. 3- Ion exchange and ion chromatograph GBC for the separation of transition and rare earth elements in geological samples.
  • A Line Drawn in the Sand – Responses to the AIDS Treatment Crisis in Africa

    A Line Drawn in the Sand – Responses to the AIDS Treatment Crisis in Africa

    2735 RUB
    A Line Drawn in the Sand – Responses to the AIDS Treatment Crisis in Africa
  • Heads in the Sand

    Heads in the Sand

    2144 RUB
    Heads in the Sand
  • Geochemical Distribution of Trace Elements in Iraqi Soils

    Geochemical Distribution of Trace Elements in Iraqi Soils

    3021 RUB
    This book provides first hand information on the geochemical distribution of 13 minor and trace elements in soils and recent sediments of Iraq. Geochemical background and baseline values are determined, based upon the analysis of more than 21000 samples, systematically collected from the Desert and Mesopotamia terrains; western and southern parts of the country. Together, they constitute more than 70% of Iraq's area and are among the most arid regions of the world. They are covered by immature soil in the former and saline fluvial deposits in the latter. The main objective of this publication is to provide reliable information on the concentration, spatial and mode of distribution and geochemical affinity of the elements analysed and to discuss factors controlling background and baseline values, including parent rocks, climate, pedogenesis, soil texture and mineralogy. The results provide valuable information on soil geochemistry in arid regions.
  • Radioactivity in sand and associated indoor radon fluxes in houses

    Radioactivity in sand and associated indoor radon fluxes in houses

    2939 RUB
    This book provides a base for readers with no previous knowledge of gamma ray spectrometry. It is aimed at providing strong foundation for readers who contemplate advancing in spectrometry and modeling. It stimulates interest and encourages reader to think about the subject by themselves. The treatment in the book is descriptive, historical and experimental. The language of this book is simplified by minimizing technical terms. Whenever they are used a full explanation is given.
  • Effect of Trace Elements on the Properties of Gray Cast Iron

    Effect of Trace Elements on the Properties of Gray Cast Iron

    3581 RUB
    The present work correlates the effect of trace elements (Boron, Lead, Bismuth and Titanium) on the tensile strength, hardness and microstructure of gray cast iron. These elements have a significant effect on the properties and microstructure of gray cast iron. These elements are deliberately added to study their effect on properties and microstructure. Boron up to 0.02% in gray cast iron showed an improvement in tensile strength and hardness values. While beyond this amount it shows a decreasing trend, due to the formation of type B and D graphitic structure. Lead in gray cast iron shows a decreasing trend in tensile strength and hardness values, even if present in trace amount, due to the formation of spiky or mesh type graphite. Bismuth also shows a decreasing trend in tensile strength and hardness values for all additions. Titanium up to 0.05% has shown a decrease in tensile strength and hardness values, while beyond this amount the properties are slightly improved. The source of trace elements into gray cast iron are mainly due the charge material i.e from pig iron, non-ferrous metal scrap, vitreous enameled scrap, leaded steel scrap, purchased scrap containing lead.
  • 痕量金属的环境行为:区域与城市污染[Behaviors of Trace Metals in Environment the Pollution in Regional and Metropolis Areas]

    痕量金属的环境行为:区域与城市污染[Behaviors of Trace Metals in Environment the Pollution in Regional and Metropolis Areas]

    2132.44 RUB
    痕量金属的环境行为:区域与城市污染[Behaviors of Trace Metals in Environment the Pollution in Regional and Metropolis Areas]
  • Characterization of trace gas fluxes in and above soil

    Characterization of trace gas fluxes in and above soil

    6744 RUB
    Nitrogen is one of the most important compounds on earth. All organisms need nitrogen to live and grow. Even the majority (78.08%) of the atmosphere (and so the air we breathe) is dinitrogen. Over the last century, human activities have dramatically increased emissions and removal of nitrogen to the global atmosphere by as much as three to five fold. Nitrous oxide is the fourth largest single contributor to positive radiative forcing, and serves as the only long-lived atmospheric tracer of human perturbations of the global nitrogen cycle. Nitrogen oxides belong to the so called indirect greenhouse gases. These indirect greenhouse gases control the abundances of direct greenhouse gases through atmospheric chemistry and contribute on this way to the greenhouse effect. For a better understanding of these feedback mechanisms it is necessary to know the source strength of nitric oxide and nitrous oxide. Thus, the knowledge about exchange processes of nitrogen is of interest and importance for scientist and policy makers, likewise.
  • Empires of the Sand – The Struggle for Mastery in the Middle East 1789–1923

    Empires of the Sand – The Struggle for Mastery in the Middle East 1789–1923

    2258 RUB
    Empires of the Sand – The Struggle for Mastery in the Middle East 1789–1923
  • Empires of the Sand – The Struggle for Mastery in the Middle East 1789–1923

    Empires of the Sand – The Struggle for Mastery in the Middle East 1789–1923

    2497 RUB
    Empires of the Sand – The Struggle for Mastery in the Middle East 1789–1923
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