نتایج جستجو برای: polymeric solutions

تعداد نتایج: 362040  

Journal: :Metals 2022

The industrialization and urbanization expansion have increased the demand for precious rare earth elements (REEs). In addition, environmental concerns regarding toxic effects of heavy metals on living organisms imposed an urgent need efficient methods their removal from wastewaters aqueous solutions. most technique metal ions is adsorption due to its reversibility high efficiency. Numerous ads...

Journal: :Journal de Mathématiques Pures et Appliquées 2011

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم ریاضی و مهندسی کامپیوتر 1392

heuristics are often used to provide solutions for flow shop scheduling problems.the performance of a heuristic is usually judged by comparing solutions and run times on test cases.this investigation proposes an analytical alternative ,called asymptotic convergence ,which tests the convergence of the heuristic to a lower bound as problem size grows. the test is a stronger variation of worst cas...

Kouhiyan Afzal, Mohammad Taghi , Farrokhian Firouzi, Ahmad , Taghavi Zahedkolaei , Mehdi ,

Background and objectives: Zerovalent iron nanoparticles (ZVIN) had high potential for nitrate removal from aqueous solutions due to high surface area and reactivity of them. The aim of this study was nitrate removal from aqueous solutions using environmentally friendly stabilized ZVIN. Methods: ZVIN were synthesized via chemical reduction by sodium borohydride. In order to preventing of ZVIN f...

2012
Cong Lv Zhen Wang Peng Wang Xinjing Tang

Photodegradable polyesters were synthesized with a photolabile monomer 2-nitrophenylethylene glycol and dioyl chlorides with different lengths. These polymers can be assembled to form polymeric particles with encapsulation of target substances. Light activation can degrade these particles and release payloads in both aqueous solutions and RAW 264.7 cells.

2017
Helmut Brand Harald Pleiner

We show that the origin of the enhanced electrical fluctuations under flow, observed over the last is years in polymer solutions, can be traced back to a dissipative cross coupling between the strain tensor (characterizing transient polymeric networks) and electric fields. Additional experiments to further test our picture are suggested.

Journal: :Chemical communications 2013
Hendrik W H van Roekel Patrick J M Stals Martijn A J Gillissen Peter A J Hilbers Albert J Markvoort Tom F A de Greef

Evaporative self-assembly of dilute solutions containing single-chain polymeric nanoparticles results in characteristic morphologies imaged using atomic force microscopy. Quantitative comparison of experimental data to morphologies obtained by lattice-gas simulations shows that the nonequilibrium patterns emerge from a complex interplay between dewetting, solvent evaporation and nanoparticle di...

2009
John W. Barrett Endre Süli JOHN W. BARRETT

This survey paper reviews recent developments concerning the existence of global weak solutions to Fokker–Planck equations with unbounded drift terms, and coupled Navier–Stokes–Fokker–Planck systems of partial differential equations, that arise in finitely extensible nonlinear elastic (FENE) type kinetic models of incompressible dilute polymeric fluids in the case of general noncorotational flow.

2015
Paula Vasquez

Wormlike micellar solutions are composed of long flexible structures that result from self-assembly processes of surfactant molecules. At high enough concentration, these wormlike micelles can entangle and give viscoelastic properties to the solution just like typical polymers. Micellar solutions, in contrast to polymeric solutions, have two different relaxation mechanisms. One is the reptation...

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