Results 81 to 90 of about 955 (144)

The ability of Azolla and lemna minor biomass to adsorpe p-cresol from aqueous solutions: Isotherms and Kinetics [PDF]

open access: yes, 2017
Background and Aims: Cresol is an extremely toxic phenolic compound even at low concentrations which can be found in industrial effluents. The aim of this study was, therefore, to assess the ability of modified Azolla and Lemna minor in p-cresol removal ...
Blark, Davud, Zazulli, Mohammad Ali
core   +1 more source

Feasibility of Improvement of the Filter Performance of Particle Filtering Respirators by Using Composite Media of Polyacrylonitrile Nanofiber (PAN) and Montmorillonite Clay Nanoparticles (MMT) [PDF]

open access: yes, 2023
Introduction: The important parameters for evaluating the performance of particle filtering respirators in international standards are the filtration efficiency and respiratory resistance of the mask filter against airflow passage.
Farideh Golbabaei   +2 more
core  

Potential Use of Pumice Stone Modified by HCl for Treatment of Textile Wastewater [PDF]

open access: yes
Background & Objectives: Textile wastewater is known as environmental pollutant. The main characteristic of textile wastewater is presence of non-used color and various organic or inorganic pollutants.
جعفری, سید جواد   +6 more
core  

تنمية مهارة الطلبة ÙÙŠ الإنشاء بالصور المتسلسلة

open access: yesJurnal Ilmiah Didaktika: Media Ilmiah Pendidikan dan Pengajaran, 2014
The material of composing lesson (insyÄ’) was important for fifth grade students at Al-Manar boarding school to study. However, most students were bored and less motivated to participate in the class. The main cause of this problem is due to the traditional methods used by teachers.
openaire   +1 more source

Preparation of low-cost and porous WO3/CNTs-Graphite-PVC films with high mechanical strength for application as bioanode in microbial fuel cell [PDF]

open access: yes
A microbial fuel cell (MFC) is a device that converts chemical energy into electrical energy through the catalytic processes of microorganisms. In this study, flexible and porous WO3/CNTs-Graphite-PVC film was fabricated through uniform adding of Zn ...
Masoud Faraji, Melika Sharitmadarian
core   +1 more source

مدل‎سازی اثر منحرف‌کننده‌ها در اسیدکاری مخازن ناهمگن کربناته در سیستم شعاعی [PDF]

open access: yes, 2018
یکی از مؤثرترین راه‌ها برای اسیدکاری مخزن‌ ناهمگن، استفاده از افزایه‌های منحرف‌کننده است. این افزایه‌ها ناحیه‌ پرتراوا را به‌صورت موقتی با افزایش ویسکوزیته، بسته نگه می‎دارند و اسید را به نواحی کم‌تراوا هدایت می‎کنند.
بهزاد حسین زاده   +3 more
core   +1 more source

Investigation of the Effect of Temperature on the Microstructural and Mechanical Properties of the Ultra-High Temperature Ceramic Composite ZrB2-SiC-TiC Using the Multi-Step Spark Plasma Sintering Method [PDF]

open access: yes
The sintering of ZrB2 presents significant challenges due to its covalent bonding and the high temperatures required for the process. Prior research has demonstrated that incorporating up to 20% by volume of SiC as an additive can enhance both the ...
M. Ahmadian, S. Pourbahraini
core   +1 more source

تنمية مهارة الطلبة ÙÙŠ الإنشاء بالصور المتسلسلة: دراسة تجريبية بمعهد المنار العصري

open access: yesJurnal Ilmiah Didaktika: Media Ilmiah Pendidikan dan Pengajaran, 2015
Arabic writing is an important subject that must be studied by fifth grade students at Al-Manar boarding school. However, many students were bored and less motivated to participate in the teaching learning process of the lesson. The main cause of this problem is due to the use of traditional methods in teaching.
openaire   +1 more source

مروری بر ساختار و عملکرد غشاهای الکترولیتی پلیمری و کاربردهای آن‌‌ها [PDF]

open access: yes
در سال ­های اخیر، پژوهش و توسعه درباره الکترولیت­ های پلیمری با سرعت زیادی در حال پیشرفت است، زیرا این مواد می­ توانند به­ عنوان جایگزین مناسبی برای الکترولیت ­های مایع در کاربردهای مختلف درنظرگرفته شوند. استفاده از الکترولیت­ های پلیمری مشکلات نشت حلال،
سحر عنایتی   +3 more
core   +1 more source

بررسی مکانیزم شکست دیسک‌های شبه سنگی حفره‌دار در آزمون برزیلی [PDF]

open access: yesMuhandisī-i manābi̒-i ma̒danī, 2018
بررسی  و شناخت رفتار تغییر شکل نمونه‌های سنگ ترد در طول بارگذاری و تاثیر آن در مکانیزم آسیب و توسعه آن حایز اهمیت است. روش‌های مختلفی برای رفتارنگاری آسیب و شکست مصالح ارایه و بسط داده شده است.
حسن سرفراز, عباس مجدی
doaj  

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