keyword
MENU ▼
Read by QxMD icon Read
search

Modified ultrafiltration

keyword
https://www.readbyqxmd.com/read/28929994/effect-of-chelators-on-functionality-of-milk-protein-concentrates-obtained-by-ultrafiltration-at-a-constant-ph-and-temperature
#1
Lata Ramchandran, XiaoXia Luo, Todor Vasiljevic
Modulating conditions during ultrafiltration of skim milk appears to be a feasible strategy to obtain milk protein concentrates (MPC) with tailored functionalities. Adjustment of pH and process temperature attenuated properties of casein micelle resulting in enhanced emulsification capacity. Additional pre-treatment options such as addition of calcium chelators can further impact on the functionality of MPC by modifying the calcium distribution and casein micelle integrity. The objective of the project was to establish effects of pre-treating skim milk with calcium chelators (EDTA or citrate) in concentrations between 10 to 30 mm prior to UF on the physical properties of the feed, corresponding retentates and dried MPC, including particle size, zeta potential and calcium distribution in skim milk and the corresponding retentates, as well as the physical functionalities such as solubility, heat stability and emulsifying properties...
September 20, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28898819/characterization-of-uf-foulants-and-fouling-mechanisms-when-applying-low-in-line-coagulant-pre-treatment
#2
Nicolas M Peleato, Raymond L Legge, Robert C Andrews
Fluorescence spectroscopy was used as a characterization method to examine organic fouling of single ultrafiltration (UF) fibres at bench-scale. Low doses of coagulant were applied to modify organic properties, without significant formation of precipitates. This approach compliments previous studies investigating coagulation as a pre-treatment method for UF fouling control, which have principally focused on reduction of foulant concentrations. Using a continuous system, short time-scale fluorescence results demonstrated significant adsorption of humic components to virgin membrane fibres...
August 30, 2017: Water Research
https://www.readbyqxmd.com/read/28828457/selective-cleavage-of-the-polyphosphoester-in-crosslinked-copper-based-nanogels-enhanced-antibacterial-performance-through-controlled-release-of-copper
#3
Nagarajan Padmavathy, Paresh Kumar Samantaray, Lopamudra Das Ghosh, Giridhar Madras, Suryasarathi Bose
Polymeric architectures with controlled and well-defined structural features are required to render a sustainable antibacterial surface - a key requirement in the design of polymeric membranes for water purification. Herein, surface selective crosslinking of copper oxide-polyphosphoester (CuO-PPE) hybrid nanogels on to polyvinylidene fluoride-styrene maleic anhydride (PVDF/SMA) ultrafiltration membranes was developed. The hybrid nanogels, composed of PPE and CuO, with inherent antifouling and antibacterial properties, were crosslinked using a macroinitiator (polyethylene glycol, PEG) and subsequently grafted on to PVDF/SMA by alkyne-anhydride reaction...
August 31, 2017: Nanoscale
https://www.readbyqxmd.com/read/28821058/exploration-of-permeability-and-antifouling-performance-on-modified-cellulose-acetate-ultrafiltration-membrane-with-cellulose-nanocrystals
#4
Jinling Lv, Guoquan Zhang, Hanmin Zhang, Fenglin Yang
Cellulose nanocrystals (CNCs) were introduced into cellulose diacetate (CDA) matrix via immerged phase-inversion process, aiming to improve the filtration and antifouling performance of CNCs/CDA blending membrane. The effects of CNCs on membrane morphologies, hydrophilicity, permeability and antifouling property were investigated. Results showed that the incorporation of CNCs into CDA membrane could effectively enhance the permeability and antifouling property of CNCs/CDA blending membrane by optimizing membrane microstructure and improving membrane hydrophilicity...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28796491/excellent-biofouling-alleviation-of-thermoexfoliated-vermiculite-blended-poly-ether-sulfone-ultrafiltration-membrane
#5
Yasin Orooji, Feng Liang, Amir Razmjou, Sha Li, Mohammad Reza Mofid, Quan Liu, Kecheng Guan, Zhengkun Liu, Wanqin Jin
Flux and antifouling properties of mixed matrix membranes (MMMs) are yet to attain satisfactory status. The objective of this study is to find a method for mitigating the biofouling of poly(ether sulfone) (PES) ultrafiltration membranes via blending of thermoexfoliated vermiculite (VMT). Flow cytometry analysis shows that the behaviors of Bacillus subtilis 168 as a Gram-positive bacterium and Escherichia coli DH5 alpha as a Gram-negative bacterium were different. Hence, cell property is a suspected contributory factor in biofilm formation...
August 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28767226/mussel-inspired-architecture-of-high-flux-loose-nanofiltration-membrane-functionalized-with-antibacterial-reduced-graphene-oxide-copper-nanocomposites
#6
Junyong Zhu, Jing Wang, Adam Andrew Uliana, Miaomiao Tian, Yiming Zhang, Yatao Zhang, Alexander Volodin, Kenneth Simoens, Shushan Yuan, Jian Li, Jiuyang Lin, Kristel Bernaerts, Bart Van der Bruggen
Graphene-based nanocomposites have a vast potential for wide-ranging antibacterial applications due to the inherently strong biocidal activity and versatile compatibility of such nanocomposites. Therefore, graphene-based functional nanomaterials can introduce enhanced antibiofouling and antimicrobial properties to polymeric membrane surfaces. In this study, reduced graphene oxide-copper (rGOC) nanocomposites were synthesized as newly robust biocides via in situ reduction. Inspired by the emerging method of bridging ultrafiltration membrane surface cavities, loose nanofiltration (NF) membranes were designed using a rapid (2 h) bioinspired strategy in which rGOC nanocomposites were firmly codeposited with polydopamine (PDA) onto an ultrafiltration support...
August 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28759452/influence-of-nanoparticles-on-filterability-of-fruit-juice-industry-wastewater-using-submerged-membrane-bioreactor
#7
Guler Turkoglu Demirkol, Nadir Dizge, Turkan Ormanci Acar, Oyku Mutlu Salmanli, Nese Tufekci
In this study, polyethersulfone (PES) ultrafiltration membrane surface was modified with nano-sized zinc oxide (nZnO) and silver (nAg) to improve the membrane filterability of the mixed liquor and used to treat fruit-juice industry wastewater in a submerged membrane bioreactor (MBR). The nAg was synthesized using three different methods. In the first method, named as nAg-M1, PES membrane was placed on the membrane module and nAg solution was passed through the membrane for 24 h at 25 ± 1 °C. In the second method, named as nAg-M2, PES membrane was placed in a glass container and it was shaken for 24 h at 150 rpm at 25 ± 1 °C...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28711270/evaluation-of-the-yield-molar-mass-of-exopolysaccharides-and-rheological-properties-of-gels-formed-during-fermentation-of-milk-by-streptococcus-thermophilus-strains-st-143-and-st-10255y
#8
Som N Khanal, John A Lucey
The yield and chemical structures of exopolysaccharides (EPS) produced by many strains of Streptococcus thermophilus have been characterized. However, the kinetics (or production profile) for EPS during milk fermentation is not clear. In this study, we investigated whether any differences existed in the yield and molar mass of EPS when milk was fermented at the same acidification rate by 2 strains of S. thermophilus (St-143 and ST-10255y). The type of EPS produced by these 2 strains is different. Milk samples were analyzed for EPS concentration every 30 min during a fermentation period of 270 min (final pH 4...
September 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28651204/iron-tannin-framework-complex-modified-pes-ultrafiltration-membranes-with-enhanced-filtration-performance-and-fouling-resistance
#9
Xiaofeng Fang, Jiansheng Li, Xin Li, Shunlong Pan, Xiuyun Sun, Jinyou Shen, Weiqing Han, Lianjun Wang, Bart Van der Bruggen
In this work, an iron-tannin-framework (ITF) complex was introduced to a poly (ether sulfone) (PES) casting solution as a hydrophilic additive to fabricate ITF/PES ultrafiltration (UF) membranes via non-solvent-induced phase separation (NIPS). The structure and performance of the PES membranes with ITF concentrations ranging from 0 to 0.9wt.% were systematically investigated by scanning electron microscopy, water contact angle, permeability, protein rejection and fouling resistance measurements. The results indicate that the pore structure and surface properties of PES UF membranes can be regulated by incorporating the ITF complex...
November 1, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28647330/effect-of-skim-milk-treated-with-high-hydrostatic-pressure-on-permeate-flux-and-fouling-during-ultrafiltration
#10
Mathilde Leu, Alice Marciniak, Julien Chamberland, Yves Pouliot, Laurent Bazinet, Alain Doyen
Ultrafiltration (UF) is largely used in the dairy industry to generate milk and whey protein concentrate for standardization of milk or production of dairy ingredients. Recently, it was demonstrated that high hydrostatic pressure (HHP) extended the shelf life of milk and improved rennet coagulation and cheese yield. Pressurization also modified casein micelle size distribution and promoted aggregation of whey proteins. These changes are likely to affect UF performance. Consequently, this study determined the effect of skim milk pressurization (300 and 600 MPa, 5 min) on UF performance in terms of permeate flux decline and fouling...
September 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28601743/highly-antifouling-and-antibacterial-performance-of-poly-vinylidene-fluoride-ultrafiltration-membranes-blending-with-copper-oxide-and-graphene-oxide-nanofillers-for-effective-wastewater-treatment
#11
Chuanqi Zhao, Jinling Lv, Xiaochen Xu, Guoquan Zhang, Yuesuo Yang, Fenglin Yang
Innovation and effective wastewater treatment technology is still in great demand given the emerging contaminants frequently spotted from the aqueous environment. By blending with poly (vinylidene fluoride) (PVDF), the strong hydrophilic graphene oxide (GO) and antibacterial copper oxide (CuxO) were used as nanofillers to develop the novel, highly antifouling composite membranes via phase inversion process in our latest work. The existence and dispersion of GO and CuxO posed a significant role on morphologies, structures, surface composition and hydrophilicity of the developed composite membranes, confirmed by SEM, TEM, FTIR and XPS in depth characterization...
November 1, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28594542/development-of-hybrid-ultrafiltration-membranes-with-improved-water-separation-properties-using-modified-superhydrophilic-metal-organic-framework-nanoparticles
#12
Huazhen Sun, Beibei Tang, Peiyi Wu
Metal-organic frameworks (MOFs) are being intensively explored as filler materials for polymeric membranes primarily due to their high polymer affinity, large pore volumes, and alterable pore functionalities, but the development of MOF-based ultrafiltration (UF) membranes for water treatment lags behind. Herein, poly(sulfobetaine methacrylate) (PSBMA)-functionalized MOF UiO-66-PSBMA was developed, and incorporated into polysulfone (PSf) casting solution to fabricate novel hybrid UF membranes via phase-inversion method...
June 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28558291/versatile-polyvinylidene-fluoride-hybrid-ultrafiltration-membranes-with-superior-antifouling-antibacterial-and-self-cleaning-properties-for-water-treatment
#13
Yuan-Wei Huang, Zuo-Ming Wang, Xi Yan, Jun Chen, Ya-Jun Guo, Wan-Zhong Lang
Novel ultrafiltration membranes with both superior antibacterial and self-cleaning properties were fabricated. By using a non-solvent induced phase separation method (NIPS), N-halamine epoxide and siloxane were grafted onto the multi-walled carbon nanotubes (N-Si-MWNTs) to fabricate polyvinylidene fluoride (PVDF) hybrid membranes. The membrane morphology was observed under a field emission scanning electron microscopy. The results demonstrated that the PVDF hybrid membranes had an asymmetrical structure, and their hydraulic permeability was evidently enhanced with the addition of modified MWNTs...
November 1, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28541950/high-performance-cellulose-acetate-polysulfone-blend-ultrafiltration-membranes-for-removal-of-heavy-metals-from-water
#14
Pourya Moradihamedani, Abdul Halim Abdullah
Neat cellulose acetate (CA) and CA/polysulfone (PSf) blend ultrafiltration membranes in the presence of polyvinylpyrrolidone as a pore former were prepared via a phase inversion technique. The prepared membranes were characterized by Fourier transform infrared, scanning electron microscopy, mechanical strength, water content, porosity, permeate flux and heavy metals (Pb(2+), Cd(2+), Zn(2+) and Ni(2+)) rejection to comprehend the impact of polymer blend composition and additive on the properties of the modified membranes...
May 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28525669/relationship-between-bioimpedance-determined-body-composition-and-peritoneal-transport-in-peritoneal-dialysis
#15
Bernardo M da Costa, Gloria Del Peso, Maria Auxiliadora Bajo, Gilda Carreño, Marta Ferreira, Carina Ferreira, Rafael Selgas
PURPOSE: In peritoneal dialysis (PD) patients, body fluid homeostasis is dependent on peritoneal elimination of water and solutes. Patients with less favorable peritoneal transport parameters should be more overhydrated. Despite this, the association between faster transport and overhydration (OH) is weak, and the factors that influence hydration status are still poorly characterized. Modified peritoneal equilibration tests (PET) offer us new parameters that might correlate better with hydration status, like free water transport (FWT)...
May 18, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28499179/fluorescent-natural-organic-matter-responsible-for-ultrafiltration-membrane-fouling-fate-contributions-and-fouling-mechanisms
#16
Hui Wang, An Ding, Zhendong Gan, Fangshu Qu, Xiaoxiang Cheng, Langming Bai, Shaodong Guo, Guibai Li, Heng Liang
Membrane fouling has been a main obstacle to the success of ultrafiltration (UF) technology. Recently, fluorescent natural organic matter (FNOM), including humic-like substances (HS) and protein-like substances, has been recognized as substances responsible for membrane fouling. In this study, the matrix of FNOM in natural river water was substantially modified by combined coagulation and powdered activated carbon adsorption to enhance the diversity of the FNOM matrix. Fluorescence excitation emission matrix spectroscopy was employed to characterize FNOM components during the UF process...
September 2017: Chemosphere
https://www.readbyqxmd.com/read/28493131/filter-aided-sample-preparation-fasp-for-improved-proteome-analysis-of-recombinant-chinese-hamster-ovary-cells
#17
Orla Coleman, Michael Henry, Martin Clynes, Paula Meleady
Chinese hamster ovary (CHO) cells are the most commonly used mammalian host cell line for biopharmaceutical production because of their ability to correctly fold and posttranslationally modify recombinant proteins that are compatible with human use. Proteomics, along with other 'omic platforms, are being used to understand the biology of CHO cells with the ultimate aim of enhancing CHO cell factories for more efficient production of biopharmaceuticals. In this chapter, we will describe an efficient protocol called Filter Aided Sample Preparation (FASP) for the extraction of proteins from CHO cells for proteomic studies...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28486230/the-rise-of-expanded-hemodialysis
#18
Claudio Ronco
The low water permeability feature of original cellulosic membranes was considered an advantage in the absence of dialysis equipment that are capable of controlling water removal. The advent of ultrafiltration control systems led to the development and use of high-flux (HF) membranes that allowed improved middle molecule removal including β-2 microglobulin. Further advances in technology allowed better control over the structure and permeability of membranes. Different polymers and improved spinning modalities led to significant advances in solute removal and hemocompatibility...
2017: Blood Purification
https://www.readbyqxmd.com/read/28431257/integrated-antimicrobial-and-antifouling-ultrafiltration-membrane-by-surface-grafting-peo-and-n-chloramine-functional-groups
#19
Shuhua Hou, Jialin Xing, Xue Dong, Jifu Zheng, Shenghai Li
Ultrafiltration membranes with integrated antimicrobial and antifouling properties were fabricated using an engineering thermoplastic (carboxylated cardopoly(aryl ether ketone, PEK-COOH). Different molecular weights of PEO (Mw: 120, 350, 550) were grafted to the PEK-COOH membrane surface via EDC/NHS methodology. N-chloramine modified membranes then were prepared by simple exposure to dilute sodium hypochlorite solution. The surface grafting processes were all performed in water (i.e. without organic solvent)...
April 11, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28413417/the-dialysis-sodium-gradient-a-modifiable-risk-factor-for-fluid-overload
#20
Emilie Trinh, Catherine Weber
BACKGROUND: Fluid overload in patients on conventional hemodialysis is a frequent complication, associated with increased cardiovascular morbidity and mortality. The dialysate sodium prescription is a potential modifiable risk factor. Our primary objective was to describe associations between dialysate-to-serum sodium gradient and parameters of fluid status. A secondary objective was to evaluate the 6-month risk of hospitalization and mortality in relation to sodium gradient. METHODS: We performed a cross-sectional study of 110 prevalent conventional hemodialysis patients at a single center...
January 2017: Nephron Extra
keyword
keyword
22227
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"