In recent years, the spinel ferrite nanoparticles due to various applications in both fundamental and have been a lot of interest. In this work, magnetic (Fe3O4) nanoparticles chloride salts deposited using both two-and trivalent manganese and iron were produced in an alkaline environment. The surface layer of silica nanoparticles with improved chemical stability and improved dispersion in the reaction medium were covered. Where the hydrolysis of Tetraethyl orthosilicate (TEOS) was used, which ...
The objective of this research is removal of Acid Red 151(A.R.151) from aqueous solutionusing palm shell as low-cost adsorbent. The operating parameters such as pH solution, doseof adsorbent, initial dye concentration were investigated. Results showed that pH: 3, dose ofadsorbent: 2g/L and initial dye concentration: 20mg/L were the most suitable. In this study,the best fit of the adsorption isotherm data was obtained using the Langmuir model and showfavorable adsorption of A.R.151 dye with ...
Due to biological and physicochemical properties of poly (-amino acid)s interest in synthesis of their novel derivatives was recently increased. As a new and simple approach, an aromatic poly (-amino acid), poly (AA), was prepared from poly salicylaldehyde (PSA) as a precursor which -amino acid groups formed as pendant groups on the PSA framework. PSA was prepared by a poly condensation reaction, after treatment of salicylaldehyde with chloromethylene group. Transformation of PSA to poly (AA) ...
مطالعه استراتژی برند کارفرما در مشاغل خصوصی از چشم zwnj;انداز مدیریت منابع انسانی چکیده برای به دست آوردن امتیاز در حالت رقابت برای مشاغل خصوصی و مهارت ها باید یک استراتژی قوی جهت جذب و حفظ فرد باهوش خلق کرد که همان استراتژی برند کارفرما است. مقاله پیش رو با قیمت 15-20 هزار ...
PREDICTION OF THE DENSITIES OF WESTERN CANADIAN HEAVY OILSAND THEIR SARA FRACTIONS FROM THE CUBICEQUATIONS OF STATE* این مقاله به زبان انگلیسی بوده و ترجمه آن نیز در سایت قرار گرفته است برای دانشجویانی که به دنبال منبع معتبر مقاله می باشند این امکان را قرار دادیم تا با مراجعه به این مقاله از آن استفاده کنند. ...
دانلود کتاب آموزش جامع نگارش انگلیسی (writing from start to finish) در این پست آموزش کامل نگارش انگلیسی را برای شما عزیزان قرار داده ام. این فایل به زبان انگلیسی است و برای مبتدیان مناسب نمیباشد. بلکه برای دوستانی که از سطح متوسط زبان برخوردارند و میخواهند طرز صحیح نگارش نامه های ...
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