نتایج جستجو برای: particle cu

تعداد نتایج: 234829  

Journal: :The journal of physical chemistry. B 2006
Natalie N Hoover Bethany J Auten Bert D Chandler

The effects of particle composition on heterogeneous catalysis were studied using dendrimer-encapsulated nanoparticles (DENs) as precursors to supported Pt-Cu catalysts. Bimetallic Pt-Cu DENs with varying Pt/Cu ratios were prepared in an anaerobic aqueous solution and deposited onto a high-purity commercial alumina support. The dendrimer template was then thermally removed to yield supported na...

2015
Chiara Civardi Mark Schubert Angelika Fey Peter Wick Francis W. M. R. Schwarze Sabrina Sarrocco

Recently introduced micronized copper (MC) formulations, consisting of a nanosized fraction of basic copper (Cu) carbonate (CuCO3·Cu(OH)2) nanoparticles (NPs), were introduced to the market for wood protection. Cu NPs may presumably be more effective against wood-destroying fungi than bulk or ionic Cu compounds. In particular, Cu- tolerant wood-destroying fungi may not recognize NPs, which may ...

ژورنال: :علوم و مهندسی سطح ایران 0
غلامرضا نبیونی گروه فیزیک، دانشکده علوم، دانشگاه اراک، ایران طاوس حسین آباد گروه فیزیک، دانشکده علوم، دانشگاه اراک، ایران کامبیز هدایتی گروه فیزیک، دانشکده علوم، دانشگاه صنعتی اراک، ایران

در این پژوهش بس لایه های co-cu/cu و fe-co-cu/cu بر روی زیر لایه شیشه /طلا به روش الکتروانباشت لایه نشانی گردید. ناهمواری های سطحی این لایه ها به وسیله میکروسکوپ نیروی اتمی بررسی شده و سپس با رسم نمودار ناهمواری سطحی بر حسب طول اسکن در مقیاس لگاریتمی نوع و اندازه ناهمواری های سطحی مورد محاسبه قرار گرفت. ساختار بس لایه ها توسط پراش اشعه ایکس مورد مطالعه قرار گرفت و پیک های مشخصه و ساختار بلوری لا...

Journal: :caspian journal of enviromental sciences 0

copper (cu) is an essential element required by all living organisms, since at least 30 enzymes are known to use cu as a cofactor. cu is also toxic in excess and liver and gills are known to be target organs for it. in the present study, 240 siberian sturgeon juvenile (with initial weight 29.2 ± 3.1 g and initial length 21.8 ± 1.4 cm) were randomly distributed in 12 fiberglass tanks at 4 differ...

2011
Amirhosein Berendjchi Ramin Khajavi Mohammad Esmaeil Yazdanshenas

The study discussed the synthesis of silica sol using the sol-gel method, doped with two different amounts of Cu nanoparticles. Cotton fabric samples were impregnated by the prepared sols and then dried and cured. To block hydroxyl groups, some samples were also treated with hexadecyltrimethoxysilane. The average particle size of colloidal silica nanoparticles were measured by the particle size...

2016
Anitha Kumari Sharma Luca Vezzaro Heidi Birch Karsten Arnbjerg-Nielsen Peter Steen Mikkelsen

This study investigated the potential effect of climate changes on stormwater pollution runoff characteristics and the treatment efficiency of a stormwater retention pond in a 95 ha catchment in Denmark. An integrated dynamic stormwater runoff quality and treatment model was used to simulate two scenarios: one representing the current climate and another representing a future climate scenario w...

2018
Sulena Pradhan Jonas Hedberg Jörgen Rosenqvist Caroline M Jonsson Susanna Wold Eva Blomberg Inger Odnevall Wallinder

This work focuses on kinetic aspects of stability, mobility, and dissolution of bare Cu, Al and Mn, and SiO2 NPs in synthetic freshwater (FW) with and without the presence of natural organic matter (NOM). This includes elucidation of particle and surface interactions, metal dissolution kinetics, and speciation predictions of released metals in solution. Dihydroxy benzoic acid (DHBA) and humic a...

2014
C. E. Lin P. K. A. Hong H. Y. Chiu R. Y. Surampalli C. T. Lin C. M. Kao

Remediation of heavy-metal-contaminated sediment is often hampered by the availability of heavy metals to the added chemical agents because the heavy metals are often shielded by the sediment matrix. Effective heavy-metal extraction technique becomes an important factor in enhancing the treatment efficiency. A novel extraction/washing technique utilizing chelating agent and elevated pressure in...

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