نتایج جستجو برای: concentration polarization

تعداد نتایج: 445199  

2004
S. X. Liu L. M. Vane M. Peng

Volume Four 5-1 THEORETICAL ANALYSIS OF CONCENTRATION POLARIZATION EFFECT ON VOC REMOVAL BY PERVAPORATION 1S.X. Liu, 2L.M. Vane, and 1M. Peng 1Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901-8520; Phone: (732) 932-9611 X240; Fax: (732) 932-6776; Email: [email protected]. 2Clean Process and Product Division, National Risk Management Research Laboratory, U.S. E...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2014
Ramadan Abu-Rjal Vahe Chinaryan Martin Z Bazant Isaak Rubinstein Boris Zaltzman

In this paper, the variation of permselectivity in the course of concentration polarization is systematically analyzed for a three-layer membrane system consisting of a nonperfectly permselective ion exchange membrane, homogeneous or heterogeneous, flanked by two diffusion layers of a binary univalent electrolyte. For a heterogeneous membrane, an ionic transport model is proposed, which is amen...

Journal: :The Analyst 2016
Min Li Robbyn K Anand

In this minireview, we discuss advancements in ion concentration polarization (ICP)-based preconcentration, separation, desalination, and dielectrophoresis that have been made over the past three years. ICP as a means of controlling the distribution of the ions and electric field in a microfluidic device has rapidly expanded its areas of application. Recent advancements have focused on the deve...

M.R. Gholamhosseinzadeh R. Farrahi-Moghaddam

In this paper, the effect of penicillin G benzathine (PGB) drug as a green corrosion inhibitor on mild steel in 1.0 M hydrochloric acid solution has been investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency (IE) was found to increase with increasing inhibitor concentration. Potentiodynamic polarization measure...

ژورنال: پژوهش در پزشکی 2015

background: Classical macrophages (M1) and alternative macrophages (M2) are responsible for various functions in order to maintain homeostasis. BCG vaccine and hydatid cyst fluid can be examples of stimulants which can cause M1and M2 macrophage polarization. Evaluating the expression of markers such as IFNγ and TNFα for M1 phenotype and TGFβ and IL4 for M2 phenotype is one of the confirmatory w...

2009
ric Lyster James Au Robert Rallo Francesc Giralt Yoram Cohen

A 3-D (3-dimensional) numerical modeling approach to analyze the coupling of mineral scale, concentration polarization and permeate flux was developed and demonstrated for a gypsum membrane scaling test in a plate-and-frame RO membrane module geometry. The impact of concentration polarization on mineral gypsum scaling, and in turn the impact of mineral scale on the concentration polarization fi...

H. Eskandari Iman Danaee, M. Ebrahimi S. Nikmanesh

In this study, the effect of molybdate on the electrochemical behavior and semi-conductive properties of duplex stainless steel 2205 passive film at NaCl solutions was investigated. Cyclic potentiodynamic polarization, impedance spectroscopy, mott-schottky plots and scanning electron microscopy (SEM) were used to study the passive behavior. Polarization curves showed that the corrosion current ...

The corrosion behavior of mild steel (Ck 45) in 3.0 M H3PO4 solution in the absence and presence of penicillin G was studied using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The best inhibition effect at 10 mM of drug was a marked characteristic of the inhibitor. It was found that the inhibition efficiency of the inhibitor...

Journal: :Physical review letters 2007
Sung Jae Kim Ying-Chih Wang Jeong Hoon Lee Hongchul Jang Jongyoon Han

A perm-selective nanochannel could initiate concentration polarization near the nanochannel, significantly decreasing (increasing) the ion concentration in the anodic (cathodic) end of the nanochannel. Such strong concentration polarization can be induced even at moderate buffer concentrations because of local ion depletion (therefore thicker local Debye layer) near the nanochannel. In addition...

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