نتایج جستجو برای: vi
تعداد نتایج: 43080 فیلتر نتایج به سال:
In the present study, a new chemically modified carbon paste electrode (CPE) is constructed for rapid, accurate, simple, highly sensitive, and selective determination of Mo (VI) using differential pulse voltammetry. The electrode was prepared using magnetic nickel zinc ferrite nanocomposite (Ni0.5Zn0.5Fe2O4), as the modifier in CPE (Ni0.5Zn0.5Fe2O4/CPE). Mo (VI) was determined after preconcentr...
The present research describes the performance of NiO NPs/Ag-clinoptilolite composite adsorbent for the removal of uranium (U(VI)) ions from drinking water of Dezful city-Iran. Prior to the experiment reactions, Na-clinoptilolite was chemically treated with NaCl, Silver ions (Ag+) and subsequently Nickel (NiO) NPs to prepare NiO NPs/Ag-clinoptilolite. The samples were characterized by SEM, AAS,...
In this study, a strain of lactic acid bacteria Streptococcus salivarius was studied for its capacity to remove hexavalent chromium (Cr (VI)) from a liquid medium and to form biofilm. Both properties are useful for using the strain in bioremediation of metal-contaminated effluents. For biofilm formation capacity, three methods were used: the tube method (TM), the Congo red agar method (CRA) and...
بهمنظور بررسی تأثیر کاربرد کودهای فسفره و ترکیبات آلی بر برخی ویژگیهای رشدی گیاه تربچه (Rhaphanus sativus L) آبیاری شده با آب آلوده به کروم VI با غلظت 25/0 میلیگرم بر لیتر، آزمایشی در قالب بلوکهای کامل تصادفی با سه تکرار در شرایط گلخانه در دانشکده کشاورزی دانشگاه صنعتی شاهرود انجام شد. تیمارهای آزمایشی شامل: شاهد، کود دیآمونیومفسفات (41 میلیگرم فسفر بر کیلوگرم)، کود سوپر فسفات تریپل (4...
کروم (VI) یکی از فلزات سنگین است که وجود آن در آب و پساب مشکلات فراوانی برای محیطزیست، موجودات زنده و بهویژه سلامتی انسان ایجاد میکند. در سالهای اخیر استفاده از جاذبهای معدنی بهدلیل ارزانبودن، دسترسی و فراوانی آنها مورد توجه قرارگرفته است. هدف از انجام این تحقیق، بررسی حذف کروم(VI) از محیط آبی و پارامترهای مؤثر بر آن، با استفاده از برخی جاذبهای معدنی با استفاده از روش طرا...
The capsular polysaccharide of Salmonella typhi, Vi, is an essential virulence factor and a protective vaccine for people older than 5 years. The safety and immunogenicity of two investigational Vi conjugate vaccines were evaluated in adults, 5- to 14-year-old children, and 2- to 4-year-old children in Vietnam. The conjugates were prepared with Pseudomonas aeruginosa recombinant exoprotein A (r...
The title compound, bis-[2,2'-dimethyl-3,3'-(butane-1,4-di-yl)diimidazol-1-ium] β-octa-molybdate(VI), (C(12)H(20)N(4))(2)[Mo(8)O(26)], was produced by hydro-thermal reaction of an acidified aqueous solution of Na(2)MoO(4) and 1,4-bis-(2-methyl-1H-imidazol-1-yl)butane (hereafter L). The structure of the title compound consists of the β-octa-molybdate anions having a center of symmetry, and proto...
the problem of removing pollutants from water is an important process and is becoming moreimportant with the increasing of industrial activities. one of the most important environmental problems iswater resources pollution by heavy metals. bioabsorbtion is affordable adsorbents for the removal of heavymetals from aqueous solutions. this study explores the adsorption potential of cr (vi), cd (ii...
gooseberry seed (phyllanthus acidus) was used as an adsorbent to determine its feasibility for the removal of cr(vi). various parameters such as ph, temperature, contact time, initial metal concentration and adsorbent dosage were investigated to determine the biosorption performance. equilibrium was attained within 60 minutes and maximum removal of 96% was achieved under the optimum conditions ...
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