2 edition of Protein adsorption onto ultrafiltration membranes found in the catalog.
Protein adsorption onto ultrafiltration membranes
Andrew Keith Lockley
Written in English
Thesis(M.Phil.)- Loughborough University of Technology.
|Statement||by Andrew Keith Lockley.|
Nima Shahkaramipour, Amin Jafari, Thien Tran, Christopher M. Stafford, Chong Cheng, Haiqing Lin. Maximizing the grafting of zwitterions onto the surface of ultrafiltration membranes to improve antifouling properties. Multiple parameters influence protein adsorption to a substrate surface including the chemical and physical properties of both the protein and the material surface, as well as the presence of other proteins on the surface. Many methods have been developed in the last several decades to study protein adsorption to biomaterial surfaces.
On the other hand, the difference in total protein adsorption on real membranes at both temperatures is not significant, however, the reduction in the total protein adsorption relative to the blank real membrane is remarkable as shown in Figure 4 B (total protein adsorption for blank real membrane is µgcm −2 and for modified. Brian D. Bowes, Abraham M. Lenhoff, Protein adsorption and transport in dextran-modified ion-exchange media. III. Effects of resin charge density and dextran content on adsorption and intraparticle uptake, Journal of Chromatography A, /, , 40, (), ().
The antifouling properties were investigated by static protein adsorption experiments and ultrafiltration experiments using bovine serum albumin (BSA) as a foulant. the book is divided into. Heated aluminum oxide particles (HAOPs) are a newly synthesized adsorbent with attractive properties for use in hybrid adsorption/membrane filtration systems. This study compared removal of natural organic matter (NOM) from water by adsorption onto HAOPs with that by adsorption onto powdered activated carbon (PAC) or coagulation with alum or ferric chloride (FeCl3); explored the overlap.
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Membrane protein adsorption may be affected by a series of factors, e.g. the surface chemistry of the membrane, adsorbed protein size, charge, shape, pH value, and so on.
As for the blood-contact membrane, interest is focused on its type Cited by: The effects of solution chemistry on the rate and extent of adsorption of a protein (BSA) and humic acid (Suwannee River humic acid) onto a regenerated cellulose ultrafiltration membrane were studied.
Isotherms were performed to determine equilibrium adsorption by: Static protein adsorption of modified membranes. The interaction between charged molecules and membranes was also studied by static protein adsorption measurements using BSA and lysozyme solutions.
In each case, the test membrane was fixed at the bottom of the filtration cell and 20 mL of 1 g/L protein solution was : Mingbo Ji, Xianhui Li, Maryam Omidvarkordshouli, Sigyn Björk Sigurdardóttir, John M.
Woodley, Anders. Ultrafiltration through microporous membranes is a well-established technique for concentrating dilute protein solutions and separating proteins from low molecular weight solutes such as salts or.
The effects of adsorption on the specific pore area and the membrane porosity were then determined using a recent model for solute transport through asymmetric ultrafiltration membranes.
The data indicate that protein adsorption occurs preferentially in the larger membrane pores, causing a greater reduction in solute sieving compared to the Cited by: Additionally, the flux of the skim milk at the constant product concentration, protein adsorption, resistance of the gel layer of the membranes were determined.
It was found that according to the decrease in water contact angle of the membrane selective layers membranes can be arranged in the series as follows: PSF > PSA > PA > PAN > CA > RC. The assumptions of membrane structure and protein behavior during filtration are illustrated in Fig.
is assumed that a protein solution of concentration c 0 is fed to the membrane with a symmetric pore structure at a constant pressure, P TM, and the protein concentration of permeate, c(t), and flux J(t) change with time due to protein adsorption on the pore surface.
Noboru Kubota, Suguru Miura, Kyoichi Saito, Kazuyuki Sugita, Kohei Watanabe, Takanobu Sugo, Comparison of protein adsorption by anion-exchange interaction onto porous hollow-fiber membrane and gel bead-packed bed, Journal of Membrane Science, /(96), (), (). The influence of osmotic pressure and solute adsorption on permeate flux during ultrafiltration of a solute that forms a gel‐like layer on membrane surfaces was investigated.
Ovalbumin solutions were ultrafiltrated using three different kinds of membranes, polyolefine, polysullfone, and polyacrylonitrile.
cells or microorganisms. Protein adsorption can, therefore, have an impact on the performance of many processes; its effects may be ben- eficial or detrimental.
In the fouling of heat exchangers, ultrafiltration membranes and other process equipment, for example, protein adsorption needs to be mini- mized 2. The development of protein adsorbents with high adsorption performance has attracted great attention due to the important role of these adsorbents in protein separation and purification.
Herein, cellulose-based composite membranes were prepared through a combination of cellulose fiber (CF) and 2,2,6,6-tetramethylpiperidineoxyl oxidized cellulose nanofiber (CNF) in alkaline/urea aqueous.
Membrane properties affect the solute-membrane interaction and, consequently, the extent of adsorption and fouling.
For filtration of proteins, since proteins adsorb more strongly to hydrophobic surfaces than hydrophilic ones, the use of hydrophilic membranes (cellulose esters, aliphatic polyamides) can help reducing membrane fouling.
The adhesion of proteins to the surface and pores of ultrafiltration membrane is one of the most important causes of membrane fouling, consequently lead to deterioration of membrane performance. In the present study, a polyacrylonitrile (PAN)-based zwitterionic ultrafiltration membrane was developed to improve its anti-protein-fouling capacity.
3-Dimethylaminopropylamine was first grafted onto. Membrane morphology is compared to protein depostion under passive adsorption and ultrafiltration conditions.
Solute resistance of protein deposits for membranes of varying roughness, structure, and permeability can vary dramatically with operating conditions. Properties of protein adsorption onto pore surface during microfiltration. The fouling of two different ultrafiltration membranes by solutions of three globular proteins with different molecular weights and isoelectric points was investigated at low concentrations relevant to secondary effluents (10 mgL –1).The results reveal the increased fouling potential of macromolecules being small enough to enter the membrane pores due to the resulting blockage and (or.
Zwitterions show great superiority in the field of polymer membrane surface functionalization, as the synthesis process is simple, the adaptability of functional groups is strong, and zwitterions with strong hydration capacity in aqueous solutions can inhibit protein adsorption.
In this study, a polyacrylonitrile ultrafiltration membrane was modified to improve anti-protein-fouling capacity by. Furthermore, the adsorption resistance, deposition resistance, and concentration polarization on the surface of the fiber membranes also decreased the membrane flux.
25,26 Surprisingly, the permeation flux of the PS/EVA nanofiber membrane was approximately 4–5 times that of the PES ultrafiltration membrane (50 kD); in other words, the.
Membrane fouling is a serious limitation of membrane processes. In order to reduce membrane fouling insight into adsorption phenomena has to be obtained.
For dairy liquids the most abundant foulant is protein. Protein adsorption onto membranes has been studied revealing the necessity of the knowledge of the specific surface area of membranes.
Microfiltration and Ultrafiltration book. Principles and Applications. The effects of protein adsorption on membrane transport depend on the relative size of the protein and membrane pores. The chapter discusses adsorption to microfiltration membranes with pores that are much larger than the size of the proteins, adsorption to semipermeable.
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Protein adsorption and cellular uptake of cerium oxide nanoparticles as a function of zeta potential. particle size, and synthesis procedure affects protein adsorption onto ceria nanoparticles.
Adsorption of bovine serum albumin on polyether sulfone ultrafiltration membranes: determination of interfacial interaction energy and effective.the membrane resistance that couples characteristic membrane parameters.
Deviations from Eq. (1) can be caused by protein deposi-tion onto the membrane surface due to CP, adsorption, and gel layer formation. These factors induce additional resistances on the feed side to the transport across the membrane.
Moreover.Ultrafiltration membranes can be used to either purify the filtrate (solution passed through the filter) or collect the retentate (material retained by the filter). Ultrafiltration is typically used to: Separate proteins from buffer components for buffer exchange, desalting, or concentration; Remove or exchange sugars.