نتایج جستجو برای: spiral wound membranes

تعداد نتایج: 194776  

Journal: :Separations 2023

In recent years, high permeability membranes (HPMs) have attracted wide attention in seawater reverse osmosis (SWRO) desalination. However, the limitation of hydrodynamics and mass transfer characteristics for conventional spiral wound modules defeats advantage HPMs. Feed spacer design is one effective ways to improve module performance by enhancing permeation flux mitigating membrane fouling. ...

2015
Kai Wang Liwei Li Huaixian Yin Tiezhu Zhang Wubo Wan Xiaosong Hu

A three-dimensional modelling approach is used to study the effects of operating and ambient conditions on the thermal behaviour of the spiral wound supercapacitor. The transient temperature distribution during cycling is obtained by using the finite element method with an implicit predictor-multicorrector algorithm. At the constant current of 2A, the results show that the maximum temperature a...

2006
Molly S. Peeples Paul Martini

We present a comparison of barstrength Qb and circumnuclear dust morphology for 75 galaxies in order to investigate how bars affect the centers of galaxies. We trace the circumnuclear dust morphology and amount of dust structure with structure maps generated from visible-wavelength HST data, finding that tightly wound nuclear dust spirals are primarily found in weakly barred galaxies. While str...

2012
Michael L. Johns Einar O. Fridjonsson Hans S. Vrouwenvelder M. L. Johns H. S. Vrouwenvelder

Magnetic Resonance Imaging (MRI) has been applied to non-invasively elucidate several aspects of bio-fouling of nano-filtration and reverse osmosis membranes (ROMs) modules as a function of fouling time. These include the spatial distribution of biomass accumulation and its effect on system hydrodynamics, the effect on these parameters of ROM cleaning protocols and the detailed validation of 3D...

Journal: :Monthly Notices of the Royal Astronomical Society 2004

2010
Yeon I Woo Bong Joo Park Hye-Lee Kim Mi Hee Lee Jungsung Kim Young-Il Yang Jung Koo Kim Kazufumi Tsubaki Dong-Wook Han Jong-Chul Park

In this study, we investigated the possible roles of (1,3)-(1,6)-β-D-glucan (β-glucan) and porous electrospun poly-lactide-co-glycolide (PLGA) membranes containing β-glucan for skin wound healing, especially their effect on adult human dermal fibroblast (aHDF) and adipose tissue-derived stem cell (ADSC) activation, proliferation, migration, collagen gel contraction and biological safety tests o...

Journal: :International wound journal 2014
Rita Singh Durgeshwer Singh

Silver nanoparticles are gaining importance as an antimicrobial agent in wound dressings. Chitin is a biopolymer envisioned to promote rapid dermal regeneration and accelerate wound healing. This study was focused on the evaluation of chitin membranes containing silver nanoparticles for use as an antimicrobial wound dressing. Silver nanoparticles were synthesised by gamma irradiation at doses o...

2017
Shengbing Yang Xiuguo Han Yuhang Jia Hongbo Zhang Tingting Tang

A novel poly(lactic-co-glycolic acid) (PLGA)-hydroxypropyltrimethyl ammonium chloride chitosan (HACC) composite nanofiber wound dressing was prepared through electrospinning and the entrapment-graft technique as an antibacterial dressing for cutaneous wound healing. HACC with 30% degrees of substitution (DS) was immobilized onto the surface of PLGA membranes via the reaction between carboxyl gr...

2014
Alfredo Cassano Carmela Conidi René Ruby-Figueroa

Orange press liquor is a by-product generated by the citrus processing industry containing huge amounts of natural phenolic compounds with recognized antioxidant activity. In this work, an integrated membrane process for the recovery of flavonoids from orange press liquors was investigated on a laboratory scale. The liquor was previously clarified by ultrafiltration (UF) in selected operating c...

2015
Alfredo Cassano Carmela Conidi René Ruby Figueroa Roberto Castro Muñoz

Commercial nanofiltration (NF) membranes in spiral-wound configuration (NP030 from Microdyn Nadir and Desal DK from GE Water & Process Technologies) were used in a sequential design in order to produce a separated fraction of phenolic and sugar compounds from an aqueous artichoke extract. For both membranes, the effect of transmembrane pressure (TMP) on the permeation flux was evaluated. In...

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