نتایج جستجو برای: chemical dispersion

تعداد نتایج: 436504  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی شیمی 1387

در این تحقیق اندازه متوسط قطره و توزیع اندازه قطره در گستره وسیعی از درصد فاز پراکنده برای چهار سامانه متفاوت فاز پراکنده غیر ویسکوز در آب مطالعه شده است. فازهای پراکنده ای که در غلظت های 5 تا 50 درصد حجمی استفاده شده اند بوسیله همزن توربینی راشتون با سرعتهای گردشی متغیر بین 300 تا 700 دور بر دقیقه متلاطم گشته اند. از آنجا که رابطه تصحیح شده مرسوم قطر ساتر را بویژه در نسبتهای بالای فاز پراکنده ...

Journal: :The Journal of chemical physics 2004
Vitaly A Rassolov Feng Xu Sophya Garashchuk

We introduce and investigate a chemical model based on perturbative corrections to the product of singlet-type strongly orthogonal geminals wave function. Two specific points are addressed (i) Overall chemical accuracy of such a model with perturbative corrections at a leading order; (ii) Quality of strong orthogonality approximation of geminals in diverse chemical systems. We use the Epstein-N...

2005
V. Samburova

High molecular weight compounds in urban atmospheric particles V. Samburova et al. High molecular weight compounds in urban atmospheric particles V. Samburova et al. Abstract The chemical nature of a large fraction of ambient organic aerosol particles is not known. However, high molecular weight compounds (often named humic-like substances) have recently been detected by several authors and the...

2011
María T. Pay Pedro Jiménez-Guerrero José M. Baldasano

Emissions of resuspensed particles from paved roads (RPR) have received an increasing attention in air quality modeling, since chemistry transport models are generally unable to reproduce particulate levels near road traffic. However, among the models operated in the forecasting mode in Europe, there is a lack of systems including the contribution of RPR on an hourly basis. Therefore, this cont...

1995
ROSEMARY F. G. WYSE

What the future holds for the stellar populations of the Milky Way Galaxy may (optimistically) be predicted by study of their past histories, as written in the chemical abundance distributions, angular momentum distributions, velocity dispersion tensor, ages and spatial structure of their constituent older stars.

2012
Renato Del Rosso Laura Capelli Licinia Dentoni Selena Sironi Jean-Michel Guillot

Experimental Approach for the Validation of Odour Dispersion Modelling Laura Capelli*, Licinia Dentoni, Selena Sironi, Jean-Michel Guillot Politecnico di Milano, Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Piazza Leonardo da Vinci 32, 20133 Milano, Italy Ecole des Mines d’Alès, Laboratoire Génie de l’Environment Industriel, 6 Av. de Clavières, F-30319 Ales Cedex,...

Journal: :Chemical communications 2011
Xiaoquan Lu Hetong Qi Xuefeng Zhang Zhonghua Xue Jun Jin Xibing Zhou Xiuhui Liu

A facile carbon radical reaction procedure and a chemical reduction method were proposed to synthesize Ag nanoparticles on functionalized graphene with uniform, high dispersion and excellent stability. The resultant material showed excellent electrocatalytic activity to nitroaromatic compounds and high sensitivity to the detection of nitroaromatic compounds.

Journal: :Structure 2010
Paul Robustelli Kai Kohlhoff Andrea Cavalli Michele Vendruscolo

We introduce a procedure to determine the structures of proteins by incorporating NMR chemical shifts as structural restraints in molecular dynamics simulations. In this approach, the chemical shifts are expressed as differentiable functions of the atomic coordinates and used to compute forces to generate trajectories that lead to the reduction of the differences between experimental and calcul...

Journal: :Optics letters 2004
Wenge Yang Amitabh Joshi Min Xiao

We show that the unique absorption and dispersion properties of the electromagnetically induced transparency can be used effectively to relax the conditions for observing the cavity ringdown effect (CRE), which can be useful in applications of CRE in ultrasensitive detection of chemical species. A more straightforward and simple method is used to model the interesting CRE.

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