PubAg

Main content area

Search

14  Search Results

1 - 14 of 14
Number of results to display per page

Search Results

1. Adsorption effects of the doping relevant peptides Insulin Lispro, Synachten, TB-500 and GHRP 5

Author:
Judák, Péter; Van Eenoo, Peter; Deventer, Koen
Source:
Analytical biochemistry 2017 v.537 pp. 69-71
ISSN:
0003-2697
Subject:
adsorption; insulin; models; peptides; quantitative analysis
Abstract:
... The tendency of peptides to adsorb to surfaces can raise a concern in variety of analytical fields where the qualitative/quantitative measurement of low concentration analytes (ng/mL-pg/mL) is required. To demonstrate the importance of using the optimal glassware/plasticware, four doping relevant model peptides (GHRP 5, TB-500, Insulin Lispro, Synachten) were chosen and their recovery from various ...
DOI:
10.1016/j.ab.2017.09.003

2. A novel method of multiple nucleic acid detection: Real-time RT-PCR coupled with probe-melting curve analysis

Author:
Han, Yang; Hou, Shao-Yang; Ji, Shang-Zhi; Cheng, Juan; Zhang, Meng-Yue; He, Li-Juan; Ye, Xiang-Zhong; Li, Yi-Min; Zhang, Yi-Xuan
Source:
Analytical biochemistry 2017 v.537 pp. 50-55
ISSN:
0003-2697
Subject:
Hepatitis C virus; Human immunodeficiency virus; fluorescence; melting; models; nucleic acids; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction
Abstract:
... A novel method, real-time reverse transcription PCR (real-time RT-PCR) coupled with probe-melting curve analysis, has been established to detect two kinds of samples within one fluorescence channel. Besides a conventional TaqMan probe, this method employs another specially designed melting-probe with a 5′ terminus modification which meets the same label with the same fluorescent group. By using an ...
DOI:
10.1016/j.ab.2017.08.026

3. Continuous liquid feeding: New method to study pesticides toxicity in Drosophila melanogaster

Author:
Soares, Jefferson J.; Gonçalves, Mayara B.; Gayer, Mateus C.; Bianchini, Matheus C.; Caurio, Aline C.; Soares, Susana J.; Puntel, Robson L.; Roehrs, Rafael; Denardin, Elton L.G.
Source:
Analytical biochemistry 2017 v.537 pp. 60-62
ISSN:
0003-2697
Subject:
Drosophila melanogaster; bioavailability; methodology; models; pesticides; toxicity; uncertainty
Abstract:
... Fly fruit Drosophila melanogaster (DM) has been extensively employed as an in vivo model system to study pesticides toxicity. Pesticide administration to the fly traditionally involves feeding in an agar-gelled feed fly's medium (AM). However, AM method has several limitations such as uncertainty regarding the bioavailability and amount of pesticides ingested. And also high manipulation of the tre ...
DOI:
10.1016/j.ab.2017.08.016

4. Accounting for frame of reference and thermodynamic non-idealities when calculating salt diffusion coefficients in ion exchange membranes

Author:
Kamcev, Jovan; Paul, Donald R.; Manning, Gerald S.; Freeman, Benny D.
Source:
Journal of membrane science 2017 v.537 pp. 396-406
ISSN:
0376-7388
Subject:
convection; diffusivity; ion-exchange membranes; ions; models; permeability; sodium chloride; sorption; thermodynamics
Abstract:
... Accurate evaluation of salt diffusion coefficients from transport rate data in ion exchange membranes requires accounting for frame of reference and non-ideal thermodynamic effects. Due to a lack of models and experimental data quantifying membrane ion activity coefficients, it has been impossible to evaluate the impact of non-ideal thermodynamic effects on observed salt diffusion coefficients. He ...
DOI:
10.1016/j.memsci.2017.05.034

5. Comparison of solid, liquid and powder forms of 3D printing techniques in membrane spacer fabrication

Author:
Tan, Wen See; Suwarno, Stanislaus Raditya; An, Jia; Chua, Chee Kai; Fane, Anthony G.; Chong, Tzyy Haur
Source:
Journal of membrane science 2017 v.537 pp. 283-296
ISSN:
0376-7388
Subject:
artificial membranes; energy use and consumption; fouling; geometry; hydrodynamics; manufacturing; mass transfer; models
Abstract:
... Feed channel spacers in a spiral wound membrane module are net-like structures that influence the hydrodynamics of the feed channel to improve the mass transfer, thus reducing the effect of concentration polarization. Common issues associated with feed channel spacers include the trade-off between mass transfer and pressure loss as well as their impact on membrane fouling. Prior studies mainly foc ...
DOI:
10.1016/j.memsci.2017.05.037

6. Developing blood leukocytes depletion membranes from the design of bio-inert PEGylated hydrogel interfaces with surface charge control

Author:
Chen, Yan-Wen; Venault, Antoine; Jhong, Jheng-Fong; Ho, Hsin-Tsung; Liu, Chuan-Chuan; Lee, Rong-Ho; Hsiue, Ging-Ho; Chang, Yung
Source:
Journal of membrane science 2017 v.537 pp. 209-219
ISSN:
0376-7388
Subject:
X-ray photoelectron spectroscopy; adhesion; artificial membranes; blood platelets; chemical composition; chlorides; erythrocytes; ethylene glycol; fibrinogen; filtration; hydrogels; hydrophilicity; leukocytes; models; pH; polyethylene glycol; polypropylenes
Abstract:
... This study investigates the development of membranes for leukocytes depletion from model hydrogel interfaces. We first designed hydrogels from 2-(dimethylamino)ethyl methacrylate (DMAEMA) and poly(ethylene glycol) methyl ether methacrylate (PEGMA) to form poly(DMAEMA-co-PEGMA), and [2-(methacryloyloxy)ethyl]trimethylammonium chloride (TMA) and PEGMA to form poly(TMA-co-PEGMA). After characterizing ...
DOI:
10.1016/j.memsci.2017.05.031

7. Dual pH- and ammonia-vapor-responsive electrospun nanofibrous membranes for oil-water separations

Author:
Ma, Wenjing; Samal, Sangram Keshari; Liu, Zhongche; Xiong, Ranhua; De Smedt, Stefaan C.; Bhushan, Bharat; Zhang, Qilu; Huang, Chaobo
Source:
Journal of membrane science 2017 v.537 pp. 128-139
ISSN:
0376-7388
Subject:
abrasion resistance; accidents; air; ammonia; artificial membranes; decanoic acid; hydrophilicity; hydrophobicity; models; nanofibers; nanoparticles; oil spills; pH; silica; thermal stability; vapors; wastewater; wettability
Abstract:
... In the last few years, the amount of industrial oily wastewater discharge and number of oil spill accidents have increased exponentially, spurring the development of highly efficient, cost-effective oil-water separation technologies. In this study, a dual pH- and ammonia-vapor-responsive polyimide (PI)-based nanofibrous membrane with high permeate flux and stability was developed for oil-water separa ...
DOI:
10.1016/j.memsci.2017.04.063

8. Global parametric sensitivity analysis of a model for dead-end microfiltration of bacterial suspensions

Author:
Cogan, N.G.; Chellam, Shankararaman
Source:
Journal of membrane science 2017 v.537 pp. 119-127
ISSN:
0376-7388
Subject:
artificial membranes; biofilm; cleaning; fouling; microfiltration; models; prediction; uncertainty; wastewater treatment; water quality
Abstract:
... One of the central problems in membrane implementation is that foulants deposit on surfaces of microfilters employed for water and wastewater treatment and reuse, reducing their productivity. In an effort to remove as much of the deposited materials as possible and maintain the flux, the direction of flow across these membranes is regularly and frequently reversed. However, backwashing only remove ...
DOI:
10.1016/j.memsci.2017.05.042

9. Hybrid membranes of sulfonated poly ether ether ketone, ionic liquid and organically modified montmorillonite for proton exchange membranes with enhanced ionic conductivity and ionic liquid lixiviation protection

Author:
Arias, Jose Jonathan Rubio; Carlos Dutra, José; Gomes, Ailton de Souza
Source:
Journal of membrane science 2017 v.537 pp. 353-361
ISSN:
0376-7388
Subject:
X-ray diffraction; artificial membranes; cations; clay; electrochemistry; impedance; ionic liquids; models; montmorillonite; nuclear magnetic resonance spectroscopy; transmission electron microscopy
Abstract:
... Through the fabrication of hybrid membranes, composed by the protic ionic liquid diethylmethylammonium trifluomethane sulfonate (demaTfO), sulfonated poly (ether ether kethone) with degree of sulfonation 73% (sPEEK73) and montmorillonite modified with dema⁺ cation (Mmtdema), this work evaluates the effect exerted by the compatibilization between clay and ionic liquid on the morphology and performa ...
DOI:
10.1016/j.memsci.2017.05.044

10. Mass transport of various membrane configurations in pressure retarded osmosis (PRO)

Author:
Cheng, Zhen Lei; Chung, Tai-Shung
Source:
Journal of membrane science 2017 v.537 pp. 160-176
ISSN:
0376-7388
Subject:
artificial membranes; commercialization; fouling; mass transfer; models; osmosis
Abstract:
... Recent development of high performance membranes and advanced modeling have moved the pressure retarded osmosis (PRO) technology closer to commercialization. Nevertheless, a PRO model, that combines the aforementioned two aspects for mathematical quantification and comprehensive assessment of the multi-configured membranes, is still lacking. For the first time, we build a universal platform to ana ...
DOI:
10.1016/j.memsci.2017.05.008

11. Modeling gas permeability and diffusivity in HAB-6FDA polyimide and its thermally rearranged analogs

Author:
Galizia, Michele; Stevens, Kevin A.; Paul, Donald R.; Freeman, Benny D.
Source:
Journal of membrane science 2017 v.537 pp. 83-92
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; diffusivity; gases; hydrogen; methane; models; nitrogen; permeability; polymers; sorption; temperature; thermodynamics
Abstract:
... Gas permeability in HAB-6FDA polyimide and its thermally rearranged analogs was described using a thermodynamic model based on the non-equilibrium lattice fluid (NELF) theory. This study is part of an ongoing effort to describe gas sorption and transport behavior of TR polymers theoretically. Hydrogen, nitrogen and methane permeability over a broad range of pressures (up to 32atm) and temperatures ...
DOI:
10.1016/j.memsci.2017.05.015

12. Novel insights into the interplay between support and active layer in the thin film composite polyamide membranes

Author:
Zhang, Qifeng; Zhang, Zhiguang; Dai, Lei; Wang, Han; Li, Shenghai; Zhang, Suobo
Source:
Journal of membrane science 2017 v.537 pp. 372-383
ISSN:
0376-7388
Subject:
adhesion; delamination; models; paper; polyamides; polymerization; reverse osmosis; thin film composite membranes
Abstract:
... Fundamental problems in thin film composite (TFC) reverse osmosis (RO) membranes in terms of the interfacial adhesion between the support and the active layer, the impact of support surface pore characteristics on the active layer formation process and the accordingly obtained active layer properties were investigated. Paper studies mainly includes following aspects: Five types of polysulfone (PSf ...
DOI:
10.1016/j.memsci.2017.05.033

13. Synthesis of novel guanidinium-based anion-exchange membranes with controlled microblock structures

Author:
Xue, Boxin; Dong, Xue; Li, Yanchun; Zheng, Jifu; Li, Shenghai; Zhang, Suobo
Source:
Journal of membrane science 2017 v.537 pp. 151-159
ISSN:
0376-7388
Subject:
cations; composite polymers; guanidinium; hydrophilicity; hydrophobicity; ion exchange; ion-exchange membranes; methylation; models; nickel; raw materials; salts; transmission electron microscopy
Abstract:
... Four guanidinuium-functionalized model compounds containing different substituent groups were prepared, and the substituent effects on the overall alkaline stability of the guanidinium cations were investigated. Based on the good alkaline stability of the model compounds, novel guanidinium-based anion exchange membranes (AEMs), GPP-co-PAEK x, with controlled microblock structures were subsequently ...
DOI:
10.1016/j.memsci.2017.05.030

14. Weak polyelectrolyte multilayers as tunable separation layers for micro-pollutant removal by hollow fiber nanofiltration membranes

Author:
Ilyas, Shazia; Abtahi, S. Mehran; Akkilic, Namik; Roesink, H.D.W.; de Vos, Wiebe M.
Source:
Journal of membrane science 2017 v.537 pp. 220-228
ISSN:
0376-7388
Subject:
acrylic acid; artificial membranes; calcium chloride; coatings; drinking water; electrolytes; hydrophilicity; models; nanofiltration; pH; permeability; pollutants; polyacrylic acid; reflectometry; sodium chloride; sodium sulfate; ultrafiltration; wastewater
Abstract:
... The presence of micro-pollutants in wastewater and in drinking water and its sources, is posing both environmental and health concerns. This work describes the development of weak polyelectrolyte multilayer (PEM) based hollow fiber nanofiltration (NF) membranes to remove micro-pollutants from aqueous sources. The charge density of weak polyelectrolytes (PEs) can be controlled by the pH of the coat ...
DOI:
10.1016/j.memsci.2017.05.027