نتایج جستجو برای: sulphates

تعداد نتایج: 677  

Journal: :Applied Water Science 2021

Abstract Current studies were performed to evaluate the physico-chemical characteristics and therapeutic potential of Chutrun thermal springs located in North-west Shigar Valley, Gilgit-Baltistan (Pakistan). Thermal with different mineral contents have been used by people for bathing health purposes since old timings. The water these contains elements like sodium, potassium, calcium, magnesium ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده مهندسی شیمی 1386

در این تحقیق تکنیک جداسازی به وسیله افرون های گازی کلوئیدی برای خالص سازی آنزیم گلوکوآمیلاز از محیط کشت جامد استفاده شد. سه روش اختلاطی و یکپارچه و روش استخراج و جداسازی همزمان به عنوان روش های تاثیرگذار در خالص سازی آنزیم گلوکوآمیلاز معرفی شدند. همچنین تاثیر مواد فعال سطحی آنیونی aot و sds و کاتیونی ttab بر روی جداسازی گلوکوآمیلاز توسط افرون ها مورد بررسی قرار گرفت. پارامترهای موثری مانند نسبت...

2009
M Wrobel J Hammerschmidt

and Introduction The peak in Sulphur price late 2008 caused again intensified investigation into the decomposition of sulphates and spend acid. One option is the recycling of sulphur from spend acid, which already started more than 40 years ago in the field of spend acid from organic processes in refineries and acrylic glass manufacturing. Since this acid couldn't be neutralized and discarded d...

Journal: :Middle European Scientific Bulletin 2021

Lake Kara-kir is located in the northwest of Bukhara oasis. The total area lake 26.5-27.2 thousand hectares. physicochemical composition water changes depending on seasons year. fact that amount chlorides contained 3.6 - 3.7 g / l, and sulfates high concentration 5.0 5.2 indicates degree salinity occurs due to chloride -sulphates. readings for dissolved cislarod vary, mainly intensity photosynt...

Journal: :The Journal of Experimental Medicine 2003
F. H. McCrudden H. L. Fales

In three cases of intestinal infantilism, the excretion of nitrogen in the urine per square meter of body surface was low. The heat radiation was normal. In spite of the fact that the absolute quantity of nitrogen was low, the distribution of nitrogen and sulphur among the various nitrogen and sulphur constituents of the urine was in the normal ratio. The ammonia excretion was normal. The ether...

2008
Mónica Sofia Furtado Martins Erika Silva Santos José Jorge Barros

Acid mine drainage (AMD) causes several environmental problems in many countries. The use of biological processes with sulphate-reducing bacteria (SRB) has great potential within environmental biotechnology. The aim of this study was to develop a bioremediation system, using a mixed culture of SRB, for the treatment of AMD from São Domingos mine. Sulphate and heavy metals (Fe, Cu and Zn) concen...

2009
R. Natarajan N. Palaniswamy M. Natesan

Potentiodynamic, impedance measurements were carried out on 304 stainless steel in 0.5N, 1.0, 2.0 and 5.0 N H2SO4 solutions. X-ray photoelectron spectroscopic [XPS] studies carried out on 304 stainless steel in H2SO4 solutions revealed the existence of CrOOH, Cr2O3, -Fe2O3, FeOOH, Mn2O3, Mn3O4, MnS, Ni (OH)2, Ni2O3, NiO, sulphides. The passive film found to contain chromium oxide inner layer an...

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