Results 61 to 70 of about 78 (71)

ارزیابی عملکرد پوشش های پلیمری برای مقره های الکتریکی در محیط های با هوای بسیار آلوده [PDF]

open access: yesBaspārish
مقره‏های الکتریکی به‌عنوان یکی از انواع عایق ‏های الکتریکی، وظیفة نگهداری کابل­ های انتقال جریان و عایق­بندی رسانا­ها را دارند. اقتصادی‌ترین نوع، مقره­‌های سرامیکی و شیشه‌ای هستند که به‌دلیل تخلیة الکتریکی در مناطق مرطوب و آلوده کارایی کمی دارند.
سحر عبدالهی باغبان
doaj   +1 more source

Qualitative and quantitative evaluation of surface water using statistical analysis in Azna River, Lorestan [PDF]

open access: yes, 2016
Water pollution in recent decades is as serious threat to the human and natural ecosystem so that assessing changes water quality are one of the most important topics for desirable use .
Artimes Ghassemi Dehnavi   +4 more
core  

Geochemical and environmental monitoring of the major and minor elements in coastal sediments of Hormoz Island coasts and drawing its distribution maps [PDF]

open access: yes, 2016
Assessing pollution of coastal sediments is environmentally and ecologically important. Therefore, the aim of this study was to determine environmental pollution and to prepare the geochemical distribution map of elements in the coastal sediments of ...
Mahdi Gholamdokht Bandari   +3 more
core  

Geological, alteration, mineralogy and geochemical studies of the Copper deposit in the Kalatehno prospect area, northwest of Gonabad (Khorasan Razavi province) [PDF]

open access: yes
The Kalatehno prospecting area is located at 23 Km northwest of Gonabad, Khorasan Razavi province, and north of the Lut Block. The geology of the area includes subvolcanic units with monzonite, monzodiorite and diorite porphyry, volcanic units ...
Roohollah Miri Bydokhti   +1 more
core   +1 more source

تشکیل و تحول خاک‌های متشکله بر روی رسوبات کواترنر در بخشی از دشت ارومیه [PDF]

open access: yesمدیریت خاک و تولید پایدار, 2015
رسوبات کواترنر بخش عمده‌ عرصه‌های کشاورزی و منابع طبیعی منطقه ارومیه را به خود اختصاص داده‌اند. به منظور بهره‌برداری بهینه و پایدار از این اراضی، چگونگی تشکیل، شناخت خصوصیات فیزیکوشیمیایی و کانی‌شناسی این خاک‌ها ضروری است.
پریسا فرزام نیا   +2 more
doaj  

روش های پژوهش در ژئومورفولوژی [PDF]

open access: yes, 2014
با توسعه دانش جدید، دو روش بسیار متفاوت جهت نیل به تبیین علمی دنبال شده است. تمایز روشنی بین این دو روش (استقراء و قیاس) وجود دارد. در روش استقرایی، تعمیم از طریق تجربه و مشاهده به دست می‌آید.
رضا منصوری   +1 more
core  

Direklo-Mehdikhan Alkaline Basalt District, an Indication of a Quaternary Continental Within Plate Extensional Mechanism [PDF]

open access: yes
IntroductionThe Direklo-Mehdikhan volcanic district is the largest volcanic region within the Qorveh-Bijar Quaternary volcanic belt, located near Qorveh in Kurdistan province, Iran.
Fatemeh Narimani   +2 more
core   +1 more source

Petrogenetic evidences in geodynamics and placement of Nordoz intrusive masses in Alborz-Azerbaijan structural zone [PDF]

open access: yes
The Oligocene Nordoz intrusive complex is located in the eastern region of Siehroud, within the East Azerbaijan province, and within the Alborz-Azerbaijan structural zone.
Amir Ali Tabakh Shabani   +4 more
core   +1 more source

Evaluation of the effect of rainbow trout (Oncorhynchus mykiss) fish farms on the water quality of Zarin Gol river using a physicochemical index (WQI) [PDF]

open access: yes
The excessive growth of the aquaculture industry, in addition to using more natural resources, causes a disturbance to the biological and non-biological balance through effluent releases, and water quality indicators provide the possibility of better ...
Naddafi, Rahmat
core  

Ecological risk assessment of pollution in sediment on benthic fauna in coast of Bandar Abbas [PDF]

open access: yes, 2014
Ecological risk assessment is determination of the probability of an adverse effect occurring to an ecological system. This investigation was carried out to assess the ecological risk of sediment in coast of Bandar Abbass in 9 stations including Shilat ...
Ejlali, Keyvan
core  

Home - About - Disclaimer - Privacy