vi

نتایج جستجو برای: vi

تعداد نتایج: 43080 فیلتر نتایج به سال:

A sensitive method for electrochemical determination of molybdenum (VI) in plant foodstuff samples using Ni0.5Zn0.5Fe2O4 nanocomposite modified carbon paste electrode

Journal: Nanochemistry Research 2016

Abbas Afkhami, Atousa Bahiraei, Mahdi Moradi, Tayyebeh Madrakian,

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...

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Removal of uranium (U(VI)) ions using NiO NPs/Ag-clinoptilolite zeolite composite adsorbent from drinking water: equilibrium, kinetic and thermodynamic studies

Journal: International Journal of Bio-Inorganic Hybrid Nanomaterials 2016

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,...

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Biofilm Formation by the Hexavalent Chromium Removing Strain Streptococcus salivarius: in Vitro Approach on Abiotic Surfaces

Journal: Pollution 2020

A. Ait-Meddour, H. Ouled-Haddar, K. Bendjeddou, M. Sifour, N. Abbas, T. Idoui,

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...

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تأثیر کاربرد کودهای آلی و فسفر بر تجمع کروم VI در گیاه تربچه آبیاری شده با آب آلوده

ژورنال: دانش آب و خاک 2017

حسن قربانی قوژدی, حمیدرضا اصغری, علی عباسپور, قاسم صیدالی,

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...

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بررسی حذف کروم (VI) از محلول‏‏‏ها‏ی آبی به‌وسیلۀجاذب‏‏‏ ها‏ی معدنی بر پایۀ روش تاگوچی

ژورنال: محیط زیست طبیعی 2017

سوسن صادقی, علی زراعتکار مقدم, محمدرضا رضایی, مطهره حقی,

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...

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Safety and immunogenicity of Vi conjugate vaccines for typhoid fever in adults, teenagers, and 2- to 4-year-old children in Vietnam.

Journal: :Infection and immunity 1999

Z Kossaczka F Y Lin V A Ho N T Thuy P Van Bay T C Thanh H B Khiem D D Trach A Karpas S Hunt D A Bryla R Schneerson J B Robbins S C Szu

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...

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Mithridates VI Eupator of Pontus: An ancient Iranian Immunologist King

2017

Elham Behzadi Payam Behzadi

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A new β-octamolybdate(VI) salt based on 1,4-bis(2-methyl-1H-imidazol-1-yl)butane

2008

Shun-Li Li Ke Tan

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...

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removal of heavy metals cr (vi), cd (ii) and ni (ii) from aqueous solution by bioabsorbtion of elaeagnus angustifolia

Journal: :international journal of environmental research 2014

m.j. amiri e. fadaei a. baghvand z. ezadkhasty

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...

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equilibrium and kinetic study on chromium (vi) removal from simulated waste water using gooseberry seeds as a novel biosorbent

Journal: :global journal of environmental science and management 2015

j. aravind g. sudha; p. kanmani a.j. devisri s. dhivyalakshmi

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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