نتایج جستجو برای: carbohydrates and heavy metal compounds chromium
تعداد نتایج: 16927622 فیلتر نتایج به سال:
Background and Aim: Breathing exposure to cement dust containing an amount of heavy metal compounds has many different local and systemic effects. The aim of the present study was to survey the extent of cement factory workers' pulmonary exposure to metal ions (Cadmium, Cobalt, Chromium and Nickel). Materials and Methods: In this cross-sectional research, environmental sampling of the fa...
2.1 Metal Toxicity ..................................................................................................................... 14 2.1.1 Selected Heavy Metals ............................................................................................ 14 2.1.1.1 Lead ......................................................................................................... 14 2.1.1.2 Cad...
abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...
aims: heavy metals are the main pollutants in nature. chromium is a heavy metal which is widely used. hexavalent chromium solubility and mobility in aqueous solutions is so high and it is easily reduced. biosorption is a process in which heavy metals are uptake through passive binding by nonliving biomass from aqueous solutions. the present study aimed to determine the capability of powdered sp...
In the present study, the water quality of Silakhor River, located in Rahim Abad hydrometric station, was analyzed based on Boron, Iron, Nickel, Fluorine, Manganese, Chromium, Cadmium, Aluminum, Copper, Zinc and Lead pollution. The samples were collected from Silakhor River in Rahim Abad hydrometric station during a one-year period, from December 2012 to November 2013. In addition, metal index ...
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
Despite the intensive research in the past decade on the microbial bioaccumulation of heavy metals, the significance of redox state for oxidative stress induction is not completely clarified. In the present study, we examined the effect of redox-active (copper and chromium) and redox-inactive (cadmium) metals on the changes in levels of oxidative stress biomarkers and antioxidant enzyme defence...
ABS11tACT: A study to measure the heavy metal pollution level in the sediment of coastal and offshore area indicates that high concentration of heavy metals were found around Manora channel and eastern coast of Karachi. In comparison with coastal areas, relatively low concentration of heavy metals was recorded in the offshore area. The result shows that sewage and industrial wastes are the main...
Metal compounds have been associated with male reproductive toxicity in vivo. The aim of the present study was to investigate the in vitro effects of 20 metal compounds using rabbit ejaculated spermatozoa as a study model for spermiotoxicity. Five of the metals tested (arsenic, cadmium, chromium, mercury and vanadium) reduced sperm motility and curvilinear velocity. Ultrastructural analyses rev...
introduction: recent investigations have detected the presence of significant levels of heavy metals (chromium, lead and cadmium) in toys and other pvc products manufactured for children. in some countries, addition of compounds containing toxic metals to toys are limited or prohibited. methods: to evaluate the safety of some of the plastic toys in the city of isfahan with respect to toxic trac...
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