نتایج جستجو برای: precipitation chemical

تعداد نتایج: 433028  

Journal: :Journal American Society of Mining and Reclamation 1992

2012
J. L. Catto C. Jakob G. Berry N. Nicholls

[1] Atmospheric fronts are important for the day-to-day variability of weather in the midlatitudes, particularly during winter when extratropical storm-tracks are at their maximum intensity. Fronts are often associated with heavy rain, and strongly affect the local space-time distribution of rainfall. A recently developed objective front identification method that distinguishes between cold, wa...

2006
Peter F. Strom

This brief literature review examines treatment technologies available for wastewater treatment plants to remove phosphorus. Although it is not meant to be exhaustive or complete, it does include some of the newest available reports on P removal. Treatment technologies presently available for phosphorus removal include: Physical: filtration for particulate phosphorus membrane technologies Chemi...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1391

one of the applications of nanotechnology is use of carbon nanotubes for the targeted delivery of drug molecules. to demonstrate the physical and chemical properties of biomolecules and identify new material of drug properties, the interaction of carbon nanotubes (cnts) with biomolecules is a subject of many investigations. cnts is a synthetic compound with extraordinary mechanical, thermal, el...

Journal: :جنگل و فرآورده های چوب 0
محمد آزادفلاح استادیار گروه علوم و صنایع چوب و کاغذ، دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران کژال مرادیان گیلان کارشناس ارشد صنایع خمیر و کاغذ، دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران حسن موسوی پژوه کارشناس ارشد صنایع خمیر و کاغذ، دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران محمد مهدی هادیلام کارشناس ارشد صنایع خمیر و کاغذ، دانشکدة مهندسی چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران الهه امینی کارشناس ارشد صنایع خمیر و کاغذ، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج، ایران

magnetic lignocellulosic fibers have good potential in applications such as information storage, security papers, electromagnetic shielding and etc. in this study unbleached bagasse fibers were used to fabricate magnetic paper by chemical co-precipitation method. lumen loading and precipitation of magnetic nanoparticles on the surface of fibers were carried out by in situ synthesis. then the fo...

Beena Bhaskaran, Manoj Sadanandan,

Nanoparticles of zirconium(IV) tungstate are prepared by chemical co-precipitation method. Thecharacterizations have been carried out by TG/DTA, DSC, AFM, XRD, FTIR and UV-Vis spectrum. PLspectrum shows two emission bands at 350 nm and at 477 nm. The effects of frequency on the dielectricbehavior and ac electrical conductivity have been studied. The dielectric constant is found to be 119.43 at1...

2009
A. Sansano P. Sobron B. Lafuente J. Medina F. Rull

Introduction: Rio Tinto area is considered a referent as an extremophilic scenery of iron rich and acidic water conditions for life [1]. Physic-chemical equilibriums taking place along of its watercourse during a year produce a repertory of mineral species related with the main chemical species in solution (sulphates and iron). Raman spectroscopy is a powerful technique that allows studying the...

2008
Pierre Julien

TREX is a physically-based, distributed model that simulates flash floods, sediment transport, and chemical transport and fate processes at the watershed scale. Basic processes in TREX include precipitation, interception, infiltration, surface runoff, and channel flow, erosion and deposition of upland soil and channel bed sediment, and chemical transport. TREX is readily coupled with standard G...

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