نتایج جستجو برای: chemical characteristics of water

تعداد نتایج: 21260804  

ژورنال: علوم آب و خاک 2014
طباطبایی, سیدحسن , قربانی دشتکی, شجاع , نورمهناد, نگار , نوری امامزاده‌ای, محمدرضا , هوشمند, عبدالرحیم ,

Usually, dry soil readily absorbs water .However, not all soils display such characteristics. Some soils (hydrophobic soils) show resistance to wetting. Because of the importance of this subject and lack of research, we evaluated the effect of heating on water repellency and some of soil physical and chemical characteristics. So soil was combined with compost and heated at deferent temperatures...

Journal: :desert 2013
h. abbasdokht m.r. edalatpisheh

in order to study of the effect of priming and salinity on physiological and chemical characteristics of wheat(triticum aestivum l.), an experiment was carried out at the experimental farm of shiraz university. results showedthat primed plants significantly reduced its gas exchanges by accelerating senescence under a series of salt stress,which became more serious along with the increasing of s...

Journal: :مدیریت اراضی 0

consumption of manure from livestock and human health aspect and their utilization as fuel, animal feed and fertilizer are important. due to the domination of livestock farming system, limited number of animals and lack of chemical fertilizer in the traditional agriculture, consumption of animal manure in the agricultural land of country was in an efficient way. introduction of   chemical ferti...

Ahmadvand, Maryam , Hashemi Garmdareh, Seyyed Ebrahim , Soltani, Jaber , Varavipour, Maryam ,

Background: Nitrogen leaching from agricultural lands is a major threat to groundwater and surface waters. This study investigated the relationship between the characteristics of wheat-straw biochar produced at different temperatures and its impact on the uptake of NO3--N. Methods: Three types of biochar were produced from wheat straw at three different pyrolysis temperatures of 300, 400 and 5...

Journal: :اکو هیدرولوژی 0
حسین یوسفی استادیار دانشکدۀ علوم و فنون نوین، دانشگاه تهران علی محمدی دانشجوی کارشناسی ارشد مهندسی اکوهیدرولوژی، دانشکدۀ علوم و فنون نوین، دانشگاه تهران یونس نوراللهی استادیار دانشکدۀ علوم و فنون نوین، دانشگاه تهران سید جواد ساداتی نژاد دانشیار دانشکدۀ علوم و فنون نوین، دانشگاه تهران

water quality in each area, indicates the impact of geology, climate and anthropogenic pollutants. monitoring of water quality in most cases result in complex data which shows the perfect act of water resources, so they need appropriate method for analyzing. in this study hydro-chemical evaluation of hiv basin which located in west of hashtgerd have been done. to measure the concentration of ma...

Journal: :مجله تحقیقات سلامت 0
m.h. salmani m.h. ehrampoush s. sheikhalishahi m. dehvari

introduction: a major concern of human being is accumulation and toxicity of heavy metals in their body. copper is a heavy metal ion that in concentration of 2 mg/l can cause numerous complications. different treatment methods have been proposed for removing metals from contaminated water by researchers. among these methods, sorption seems a better method with high removal efficiency. in this s...

Journal: :journal of research in health sciences 0
mt samadi ar rahmani m sedehi n sonboli

background: the purpose of study was to evaluate and compare chemical quality of iranian bottled drinking water reported on manufacturer's labeling and standards. methods: this study was a cross-sectional descriptive study and done during july to december 2008. the bottled mineral water collected from shops randomly were analyzed for all parameters address on manufacturer's labeling and the res...

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