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ion exchange resin

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https://www.readbyqxmd.com/read/28100119/distribution-of-saccharides-and-salts-on-amphoteric-ion-exchange-resin
#1
Yuki Sha, Ayako Hasegawa, Utano Aimoto, Shuji Adachi
An amphoteric ion-exchange resin hardly shrank in 550 and 300 g/L glucose and sodium chloride solutions, respectively; however, the bed packed with a cation-exchange resin shrank considerably. From the distribution coefficients of some saccharides, the swelling pressure of the amphoteric ion-exchange resin was estimated to be 2.0 MPa at 25 °C. The distribution coefficients of glucose, galactose, fructose, and mannose were independent of their concentration and were about 0.621. On the other hand, the apparent distribution coefficients of NaF, NaCl, NaBr, NaI, LiCl, KCl, and CsCl largely depended on concentration...
January 19, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28079208/controlled-assembly-of-single-colloidal-crystals-using-electro-osmotic-micro-pumps
#2
Ran Niu, Erdal C Oğuz, Hannah Müller, Alexander Reinmüller, Denis Botin, Hartmut Löwen, Thomas Palberg
We assemble charged colloidal spheres at deliberately chosen locations on a charged unstructured glass substrate utilizing ion exchange based electro-osmotic micro-pumps. Using microscopy, a simple scaling theory and Brownian dynamics computer simulations, we systematically explore the control parameters of crystal assembly and the mechanisms through which they depend on the experimental boundary conditions. We demonstrate that crystal quality depends crucially on the assembly distance of the colloids. This is understood as resulting from the competition between inward transport by the electro-osmotic pump flow and the electro-phoretic outward motion of the colloids...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28063313/desulfurization-critical-step-towards-enhanced-selenium-removal-from-industrial-effluents
#3
Lucian C Staicu, Nadia Morin-Crini, Grégorio Crini
Selenium (Se) removal from synthetic solutions and from real Flue Gas Desulfurization (FGD) wastewater generated by a coal-fired power plant was studied for the first time using a commercial iron oxide impregnated strong base anion exchange resin, Purolite(®) FerrIX A33E. In synthetic solutions, the resin showed high affinity for selenate and selenite, while sulfate exhibited a strong competition for both oxyanions. The FGD wastewater investigated is a complex system that contains Se (∼1200 μg L(-1)), SO4(2-) (∼1...
December 29, 2016: Chemosphere
https://www.readbyqxmd.com/read/28050945/a-novel-poly-ligand-exchanger-cu-ii-loaded-chelating-resin-for-the-removal-of-ammonia-nitrogen-in-aqueous-solutions
#4
Quanzhou Chen, Kanggen Zhou, Yan Chen, Aihe Wang, Fang Liu
In this paper, a poly ligand exchanger, Cu(II)-loaded chelating resin bearing the functional group of weak iminodiacetate acid was prepared to efficiently remove ammonia from solutions. Batch adsorption equilibrium experiments were conducted under a range of conditions to determine the optimum adsorption conditions. The effects of contact time, pH, resin dosage and temperature on the removal of ammonia by a Cu(II)-loaded resin were determined. The maximum removal efficiency was reached at pH 9.5 at room temperature, 25°C, in 300 min...
January 18, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28032692/carbon-nanotubes-a-resin-for-electrochemically-modulated-liquid-chromatography
#5
Markus Brammen, Paula Fraga-García, Sonja Berensmeier
Electrochemically modulated liquid chromatography is a special form of ion exchange chromatography in which the separation process is controlled by applying an electric potential to the stationary phase. This form of chromatography has so far only been applied in research studies. The present study shows that multiwalled carbon nanotubes are an effective resin material for an electrochemically modulated chromatography process. The experiments are carried out in a newly designed column which enables the packing of nanomaterials...
December 29, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27992113/systematic-interpolation-method-predicts-protein-chromatographic-elution-with-salt-gradients-ph-gradients-and-combined-salt-ph-gradients
#6
Arch Creasy, Gregory Barker, Giorgio Carta
A methodology is presented to predict protein elution behavior from an ion exchange column using both individual or combined pH and salt gradients based on high-throughput batch isotherm data. The buffer compositions were first optimized to generate linear pH gradients from pH 5.5 to 7 with defined concentrations of sodium chloride. Next, high-throughput batch isotherm data were collected for a monoclonal antibody on the cation exchange resin POROS XS over a range of protein concentrations, salt concentrations, and solution pH...
December 19, 2016: Biotechnology Journal
https://www.readbyqxmd.com/read/27990533/a-new-way-to-do-an-old-reaction-highly-efficient-reduction-of-organic-azides-by-sodium-iodide-in-the-presence-of-acidic-ion-exchange-resin
#7
Kajitha Suthagar, Antony J Fairbanks
Organic azides are readily reduced to the corresponding amines by treatment with sodium iodide in the presence of acidic ion exchange resin. The process, optimal when performed at 40 °C and 200 mbar pressure on a rotatory evaporator, is extremely efficient, clean, and tolerant of a variety of functional groups.
December 19, 2016: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/27987837/pilot-production-of-ulvans-from-ulva-sp-and-their-effects-on-hyaluronan-and-collagen-production-in-cultured-dermal-fibroblasts
#8
Amandine Adrien, Antoine Bonnet, Delphine Dufour, Stanislas Baudouin, Thierry Maugard, Nicolas Bridiau
Ulvans from Ulva sp. were tested for their potential cosmetic properties on human dermal fibroblasts. The crude ulvans (ULVAN-01, 57kDa), extracted using a patented acid- and solvent-free process, were subjected to depolymerization using ion exchange resin to obtain a low molecular weight ulvan (ULVAN-DEP, 4kDa). The biochemical characterization and UHPLC-HRMS analyses of these extracted ulvans showed that they were of high purity and predominantly composed of a repeated ulvanobiouronic acid disaccharide. Fibroblast proliferation, as well as hyaluronan and collagen release were assessed, demonstrating that ULVAN-01 reduced fibroblast proliferation rate while ULVAN-DEP had no significant effect...
February 10, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27960600/boron-removal-by-a-composite-sorbent-polyethylenimine-tannic-acid-derivative-immobilized-in-alginate-hydrogel-beads
#9
Caroline Bertagnolli, Andrey Grishin, Thierry Vincent, Eric Guibal
A novel composite material was prepared by the grafting of tannic acid on polyethylenimine (PEI), which allows an efficient sorption of boron (sorption capacity close to 0.89 mmol B g(-1)). The encapsulation of this chelating sorbent (finely crushed) facilitates its use (readily solid/liquid separation, use in fixed-bed columns) at the expense of a loss in sorption capacity (proportionally decreased by the introduction of alginate having poor efficiency for boron uptake). Sorption isotherms are modeled using the Langmuir equation, while the kinetic profiles are presented a good fit by pseudo-second order rate equation...
December 14, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27937066/purification-of-common-light-chain-igg-like-bispecific-antibodies-using-highly-linear-ph-gradients
#10
Beth Sharkey, Sarat Pudi, Ian Wallace Moyer, Lihui Zhong, Bianka Prinz, Hemanta Baruah, Heather Lynaugh, Sampath Kumar, K Dane Wittrup, Juergen H Nett
Monovalent bispecific antibodies (BsAbs) are projected to have broad clinical applications due to their ability to bind two different targets simultaneously. Although they can be produced using recombinant technologies, the correct pairing of heavy and light chains is a significant manufacturing problem. Various approaches exploit mutations or linkers to favor the formation of the desired BsAb, but a format using a single common light chain has the advantage that no other modification to the antibody is required...
December 12, 2016: MAbs
https://www.readbyqxmd.com/read/27921260/development-of-oral-flexible-tablet-oft-formulation-for-pediatric-and-geriatric-patients-a-novel-age-appropriate-formulation-platform
#11
Prabagaran Chandrasekaran, Ruckmani Kandasamy
Development of palatable formulations for pediatric and geriatric patients involves various challenges. However, an innovative development with beneficial characteristics of marketed formulations in a single formulation platform was attempted. The goal of this research was to develop solid oral flexible tablets (OFTs) as a platform for pediatrics and geriatrics as oral delivery is the most convenient and widely used mode of drug administration. For this purpose, a flexible tablet formulation using cetirizine hydrochloride as model stability labile class 1 and 3 drug as per the Biopharmaceutical Classification System was developed...
December 5, 2016: AAPS PharmSciTech
https://www.readbyqxmd.com/read/27916127/in-situ-determination-of-v-v-by-diffusive-gradients-in-thin-films-and-inductively-coupled-plasma-mass-spectrometry-techniques-using-amberlite-ira-410-resin-as-a-binding-layer
#12
Karen Silva Luko, Amauri Antonio Menegário, Carlos Alfredo Suárez, Makenly Tafurt-Cardona, Jorge Henrique Pedrobom, Ana Marta Cavinato Marchini Rolisola, Everton Tiago Sulato, Chang Hung Kiang
Amberlite IRA-410 anionic exchange resin was evaluated as the binding layer for sampling V(V) by using Diffusive Gradients in Thin Films (DGT). V(V) was determined by inductively coupled plasma mass spectrometry (ICP-MS). Mass vs. time DGT deployments (ionic strength = 0.03 mol L(-1) NaNO3, pH = 5.6 and T = 23.5 ± 0.5 °C) was characterized by excellent linear relationship (R(2) = 0.9993) and a significant retention of V(V) by the binding layer. An exchange capacity of at least 40 μg V g(-1) resin was achieved for the proposed binding layer...
January 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27889182/development-of-polyethyleneimine-loaded-core-shell-chitosan-hollow-beads-and-their-application-for-platinum-recovery-in-sequential-metal-scavenging-fill-and-draw-process
#13
Myung-Hee Song, Sok Kim, D Harikishore Kumar Reddy, Wei Wei, John Kwame Bediako, Sangwon Park, Yeoung-Sang Yun
Polyethyleneimine (PEI)-loaded chitosan hollow beads (CHBs) were fabricated through the ionotropic gelation process using sodium tripolyphosphate (TPP) as a counter polyanion. The CHBs were loaded with hydrophilic PEI in pre- and/or post-loading methods. Hence, the sorbent could possess a large number of amine groups which were able to function as the binding sites to recover platinum metal ions. The enhancement of the amine groups was confirmed by Fourier transform infrared spectroscopy (FTIR). Isotherm and kinetic studies were carried out to evaluate the sorption performance of the sorbents...
February 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27886760/practical-limitations-of-single-particle-icp-ms-in-the-determination-of-nanoparticle-size-distributions-and-dissolution-case-of-rare-earth-oxides
#14
Laurie Fréchette-Viens, Madjid Hadioui, Kevin J Wilkinson
The applicability of single particle ICP-MS (SP-ICP-MS) for the analysis of nanoparticle size distributions and the determination of particle numbers was evaluated using the rare earth oxide, La2O3, as a model particle. The composition of the storage containers, as well as the ICP-MS sample introduction system were found to significantly impact SP-ICP-MS analysis. While La2O3 nanoparticles (La2O3 NP) did not appear to interact strongly with sample containers, adsorptive losses of La(3+)(over 24h) were substantial (>72%) for fluorinated ethylene propylene bottles as opposed to polypropylene (<10%)...
January 15, 2017: Talanta
https://www.readbyqxmd.com/read/27832302/rapid-ion-exchange-matrix-removal-for-a-decrease-of-detection-limits-in-the-analysis-of-salt-rich-reservoir-waters-for-fluorobenzoic-acids-by-liquid-chromatography-coupled-with-tandem-mass-spectrometry
#15
Paweł Kubica, Véronique Vacchina, Tomasz Wasilewski, Stéphanie Reynaud, Joanna Szpunar, Ryszard Lobinski
A matrix removal procedure with ion-exchange resin prior to analysis for 18 fluorinated benzoic acids (FBAs) tracers in saline (>25% salt) reservoir water was optimized. The elimination of >98% of salt and the simultaneous matrix sample cleanup allowed the direct analysis using the supernatant by liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS). This resulted in a gain in detection limits for most of the tracers in comparison with the reference method (direct analysis after minimum required dilution)...
November 10, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27819157/improvement-of-side-effects-and-treatment-on-the-experimental-colitis-in-mice-of-a-resin-microcapsule-loading-hydrocortisone-sodium-succinate
#16
Kai Dong, Hefeng Zhang, Yan Yan, Jinyao Sun, Yalin Dong, Ke Wang, Lu Zhang, Xianpeng Shi, Jianfeng Xing
CONTEXT: Extensive or long-time use of corticosteroids often causes many toxic side-effects. The ion exchange resins and the coating material, Eudragit, can be used in combination to form a new oral delivery system to deliver corticosteroids. OBJECTIVES: The resin microcapsule (DRM) composed by Amberlite 717 and Eudragit S100 was used to target hydrocortisone (HC) to the colon in order to improve its treatment effect on ulcerative colitis (UC) and reduce its toxic side-effects...
November 21, 2016: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/27805763/superparamagnetic-composites-based-on-ionic-resin-beads-caco3-magnetite
#17
Ion Bunia, Vlad Socoliuc, Ladislau Vekas, Florica Doroftei, Cristian Varganici, Adina Coroaba, Bogdan C Simionescu, Marcela Mihai
The preparation of superparamagnetic composites obtained by CaCO3 mineralization from supersaturate aqueous solutions is presented. The preparation was conducted in the presence of oleic acid stabilized magnetite nanoparticles as a water-based magnetic fluid and insoluble templates as gel-like cross-linked polymeric beads. The presence of the magnetic particles in the composites provides a facile way for external manipulation using a permanent magnet, thus allowing the separation and extraction of magnetically modified materials...
December 12, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27778226/in-vitro-clearance-of-doxorubicin-with-a-dna-based-filtration-device-designed-for-intravascular-use-with-intra-arterial-chemotherapy
#18
Mariam S Aboian, Jay F Yu, Ayushi Gautam, Chia-Hung Sze, Jeffrey K Yang, Jonathan Chan, Prasheel V Lillaney, Caroline D Jordan, Hee-Jeung Oh, David M Wilson, Anand S Patel, Mark W Wilson, Steven W Hetts
To report a novel method using immobilized DNA within mesh to sequester drugs that have intrinsic DNA binding characteristics directly from flowing blood. DNA binding experiments were carried out in vitro with doxorubicin in saline (PBS solution), porcine serum, and porcine blood. Genomic DNA was used to identify the concentration of DNA that shows optimum binding clearance of doxorubicin from solution. Doxorubicin binding kinetics by DNA enclosed within porous mesh bags was evaluated. Flow model simulating blood flow in the inferior vena cava was used to determine in vitro binding kinetics between doxorubicin and DNA...
December 2016: Biomedical Microdevices
https://www.readbyqxmd.com/read/27774905/estradiol-uptake-in-a-combined-magnetic-ion-exchange-ultrafiltration-miex-uf-process-during-water-treatment
#19
Alessandra Imbrogno, Jennifer Biscarat, Andrea Iris Schäfer
BACKGROUND: Estrogens and their synthetic analogues are widely used as pharmaceuticals. Upon oral administration these drugs are eventually excreted via urine. The persistence of these pharmaceuticals and inefficient removal by water treatment lead to accumulation in surface water and effluents with negative effects for aquatic life and human health. METHODS: In this study, the uptake of estradiol by a combined magnetic ion exchange resin - ultrafiltration process (MIEX-UF) was investigated...
October 21, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27774045/automated-small-scale-protein-purification-and-analysis-for-accelerated-development-of-protein-therapeutics
#20
Xavier LeSaout, Matteo Costioli, Lynn Jordan, Jeremy Lambert, Ross Beighley, Laurel Provencher, Brian Gerwe, Kevin McGuire, Nico Verlinden, Andrew Barry
Small-scale protein purification presents opportunities for accelerated process development of biotherapeutic molecules. Miniaturization of purification conditions reduces time and allows for parallel processing of samples, thus offering increased statistical significance and greater breadth of variables. The ability of the miniaturized platform to be predictive of larger scale purification schemes is of critical importance. The PerkinElmer JANUS BioTx Pro and Pro-Plus workstations were developed as intuitive, flexible, and automated devices capable of performing parallel small-scale analytical protein purification...
March 2016: Engineering in Life Sciences
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