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ion exchange resin

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https://www.readbyqxmd.com/read/29213186/cyclic-fractionation-process-for-saccharina-latissima-using-aqueous-chelator-and-ion-exchange-resin
#1
Martin Sterner, Mauricio Sodré Ribeiro, Fredrik Gröndahl, Ulrica Edlund
A new approach to process Saccharina latissima algal biomass was developed using sodium citrate and a polyvalent cation-specific resin to sequentially extract the alginate into several usable fractions. The fractionation was performed in a cyclic manner, utilizing a stepwise removal of the native polyvalent ions present in the algae to isolate fractions of alginate with different solubility in the presence of these ions. Sodium citrate was used in different concentrations in the extraction solution to remove polyvalent cations to adjust the alginate liberation while AMBERLITE IRC718 resin was added to further remove these ions and regenerate the extraction solution...
2017: Journal of Applied Phycology
https://www.readbyqxmd.com/read/29213069/preparation-of-permanent-magnetic-resin-crosslinking-by-diallyl-itaconate-and-its-adsorptive-and-anti-fouling-behaviors-for-humic-acid-removal
#2
Qimeng Li, Ji Wu, Ming Hua, Guang Zhang, Wentao Li, Chendong Shuang, Aimin Li
In this research, a series of permanent magnetic anion exchange resins (MAERs) were prepared by polymerizing glycidyl methacrylate monomer and crosslinking diallyl itaconate (DAI) and divinylbenzene. The properties and performances of these novel MAERs were systematically characterized and evaluated for humic acid (HA) adsorption by batch experiments. With the increase of DAI content from 0 to 15%, the moisture of MAERs was elevated from 50.23% to 68.53%, along with the adsorption capacity increasing from 2...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29200711/biological-activities-and-cytotoxicity-of-eperua-oleifera-ducke-oil-resin
#3
Fernanda Torlania Alves Gomes, Ana Paula de Araújo Boleti, Lidiam M Leandro, Diego Squinello, Ellen S P Aranha, Marne C Vasconcelos, Paul Cos, Valdir F Veiga-Junior, Emerson Silva Lima
Background: The oil-resin of Eperua oleifera Ducke has been used in popular medicine similarly to the copaiba oil (Copaifera spp.). Objective: This study aimed to investigate the effects of the acid fraction of E. oleifera oil-resin (AFEOR) on cell proliferation, collagen production in human fibroblasts, inhibition of metalloproteinases, and cytotoxicity against tumor cell lines. Materials and Methods: Acid fraction of E. oleifera was fractionated in the ion exchange column chromatography...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29195216/photo-induced-toxicity-of-tungsten-oxide-photochromic-nanoparticles
#4
A L Popov, N M Zholobak, O I Balko, O B Balko, A B Shcherbakov, N R Popova, O S Ivanova, A E Baranchikov, V K Ivanov
We synthesised a new type of photochromic tungsten oxide nanoparticles, analysed their photocatalytic activity and carried out a thorough analysis of their effect on prokaryotic and eukaryotic organisms. Ultrasmall hydrated tungsten oxide nanoparticles were prepared by means of hydrothermal treatment of tungstic acid in the presence of polyvinylpyrrolidone as a template, stabiliser and growth regulator. Tungstic acid was synthesised through an ion-exchange method using sodium tungstate solution and a strongly acidic cation exchange resin...
November 20, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29185698/suppressing-shuttle-effect-using-janus-cation-exchange-membrane-for-high-performance-lithium-sulfur-battery-separator
#5
Zhen Li, Yu Han, Junhua Wei, Wenqiang Wang, Tiantian Cao, Shengming Xu, Zhenghe Xu
Suppressing the shuttle effect of polysulfide ions to obtain high durability and good electrochemical performance is of great concern in the field of lithium sulfur battery. To address this issue, Janus membrane consisting of an ultrathin dense layer and a robust microporous layer is fabricated using cation exchange resin. Different from the composite membranes made from polyolefin membranes, the multiple layers of Janus membrane in this study are synchronously generated by one step, getting rid of the additional complex coating processes...
November 29, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29137750/intensification-of-ion-exchange-desorption-of-thiamine-diphosphate-by-low-powered-ultrasound
#6
Natalia A Pinchukova, Alexander Y Voloshko, Maria A Merko, Yana A Bondarenko, Valentin A Chebanov
The process of ultrasound-assisted ion-exchange desorption of cocarboxylase (thiamine diphosphate (TDP)) from a strong acidic cation resin was studied. Kinetics studies revealed that ultrasound accelerates TDP desorption by 3 times. The optimal desorption parameters, viz. US power input, sonication time, eluent/resin ratio and the eluent (ammonium acetate buffer) concentration were established which were 15mW/cm(3), 20min, 1:1 and 1M, respectively. The resin stability studies showed that the optimal ultrasonic power was less by the order than the resin degradation threshold which ensures durable and efficient resin exploitation during production...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29128590/synthesis-and-characterization-of-a-new-soluble-soybean-polysaccharide-iron-iii-complex-using-ion-exchange-column
#7
Wenhong Gao, Yangping Huang, Ruixue He, Xin-An Zeng
A new ion exchange column method was investigated to synthesize the soluble soybean polysaccharide-iron(III) complex (SSPS-FeIII(1)) using soluble soybean polysaccharides (SSPS). The feasibility of ion exchange column reaction was explored firstly. Results indicated the D730 anion macroporous adsorption resin could effectively absorb SSPS and the static adsorption saturation time was 20h. The iron content of the complex reached up to 15.07% when trisodium citrate concentration was 2mg/mL. The structure of SSPS-FeIII complex synthesized by this method (SSPS-FeIII1(2)) was compared with that prepared by trisodium citrate - ferric chloride method (SSPS-FeIII2(3))...
November 8, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29100131/recent-developments-in-nanostructured-inorganic-materials-for-sorption-of-cesium-and-strontium-synthesis-and-shaping-sorption-capacity-mechanisms-and-selectivity-a-review
#8
REVIEW
Delhia Alby, Clarence Charnay, Marc Heran, Bénédicte Prelot, Jerzy Zajac
Liquid wastes containing non-ferrous heavy metal ions and some radionuclides, (137)Cs and (90)Sr in particular, represent one of the most dangerous sources of environmental contamination. The remediation of wastewater containing such pollutants continue to be among the biggest challenges of Sustainable Development and Environmental Safety. Sorption-based technologies have proven their efficiency also in reducing the radionuclide content in aqueous streams to low-level residual activity, with the concomitant decrease in the amount of ultimate solid waste generated...
October 24, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29100119/simultaneous-uptake-of-nom-and-microcystin-lr-by-anion-exchange-resins-effect-of-inorganic-ions-and-resin-regeneration
#9
Fuhar Dixit, Benoit Barbeau, Madjid Mohseni
This study investigated the efficiency of a strongly basic macroporous anion exchange resin for the co-removal of Microcystin-LR (MCLR) and natural organic matter (NOM) in waters affected by toxic algal blooms. Environmental factors influencing the uptake behavior included MCLR and resin concentrations, NOM and anionic species, specifically nitrate, sulphate and bicarbonate. A860 resin exhibited an excellent adsorption capacity of 3800 μg/g; more than 60% of the MCLR removal was achieved within 10 min with a resin dosage of 200 mg/L (∼1 mL/L)...
October 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/29080819/isolation-purification-and-antioxidant-activity-of-polysaccharides-from-the-leaves-of-maca-lepidium-meyenii
#10
Kang Caicai, Hao Limin, Zhang Liming, Zheng Zhiqiang, Yang Yongwu
Two fractions of polysaccharides (MLP-1 and MLP-2) were extracted from the leaves of maca (Lepidium Meyenii Walp.) by water, and purified using DEAE-52 ion exchange resin and sephadex G-200 clumns chromatography. An investigation was carried out for their structural characterization and antioxidant activity in vitro. The results indicated that MLP-1 was mainly composed of ribose, rhamnose, arabinose, xylose, mannose, glucose and galactose, with the molar ratio of 0.12:0.32:1.50:0.32:1.03:1.00:0.93; the MLP-2 was a homopolysaccharide composed of glucose...
October 25, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29080542/effect-of-pore-structure-on-the-removal-of-clofibric-acid-by-magnetic-anion-exchange-resin
#11
Liang Tan, Chendong Shuang, Yunshu Wang, Jun Wang, Yihong Su, Aimin Li
The effect of pore structure of resin on clofibric acid (CA) adsorption behavior was investigated by using magnetic anion exchange resins (ND-1, ND-2, ND-3) with increasing pore diameter by 11.68, 15.37, 24.94 nm. Resin with larger pores showed faster adsorption rates and a higher adsorption capacity because the more opened tunnels provided by larger pores benefit the CA diffusion into the resin matrix. The ion exchange by the electrostatic interactions between Cl-type resin and CA resulted in chloride releasing to the solution, and the ratio of released chloride to CA adsorption amount decreased from 0...
October 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/29078008/high-precision-determination-of-lithium-and-magnesium-isotopes-utilising-single-column-separation-and-mc-icpms
#12
Madeleine S Bohlin, Sambuddha Misra, Nicholas Lloyd, Henry Elderfield, Mike J Bickle
RATIONALE: Li and Mg isotopes are increasingly used as a combined tool within the geosciences. However, established methods require separate sample purification protocols utilising several column separation procedures. This study presents a single-step cation exchange method for quantitative separation of trace levels of Li and Mg from multiple sample matrices. METHODS: The column method utilises the macro-porous AGMP-50 resin and a high aspect ratio column, allowing quantitative separation of Li and Mg from natural waters, sediments, rocks and carbonate matrices following the same elution protocol...
October 27, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29077235/strontium-carbonate-precipitation-as-a-sample-preparation-technique-for-isotope-ratio-analysis-of-sr-in-mineral-water-and-wine-by-quadrupole-based-icp-ms
#13
M Dronov, T Koza, A Schwiers, T C Schmidt, J Schram
RATIONALE: The defined origin of food products is nowadays often seen as a marker of quality. Sr isotope ratio determination can be used to verify the origin of such food products and it has thus become an important technique. Wine samples in particular are often investigated using this technique. Sr isotopic ratio measurements are often disturbed by isobaric Rb interference, making a separation procedure necessary. In this investigation a very simple and effective procedure for the separation of Rb(+) and Sr(2+) ions for Sr isotope ratio determination in mineral water and wine samples was developed...
October 27, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29066970/hupresin-retains-binding-capacity-for-butyrylcholinesterase-and-acetylcholinesterase-after-sanitation-with-sodium-hydroxide
#14
Seda Onder, Emilie David, Ozden Tacal, Lawrence M Schopfer, Oksana Lockridge
Hupresin is a new affinity resin that binds butyrylcholinesterase (BChE) in human plasma and acetylcholinesterase (AChE) solubilized from red blood cells (RBC). Hupresin is available from the CHEMFORASE company. BChE in human plasma binds to Hupresin and is released with 0.1 M trimethylammonium bromide (TMA) with full activity and 10-15% purity. BChE immunopurified from plasma by binding to immobilized monoclonal beads has fewer contaminating proteins than the one-step Hupresin-purified BChE. However, when affinity chromatography on Hupresin follows ion exchange chromatography at pH 4...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29055527/multi-state-steric-mass-action-model-and-case-study-on-complex-high-loading-behavior-of-mab-on-ion-exchange-tentacle-resin
#15
Juliane Diedrich, William Heymann, Samuel Leweke, Stephen Hunt, Robert Todd, Christian Kunert, Will Johnson, Eric von Lieres
Tentacle resins for IEX are increasingly applied in preparative chromatography for their higher selectivity and higher capacities in comparison to IEX resins without tentacles. However, tentacle resins are often observed to cause unusual elution behavior of monoclonal antibodies under high loading conditions. Understanding this elution behavior is important for a quality by design approach, as it is now mandated by regulatory agencies. A model-based analysis of load, wash and gradient elution is performed for a monoclonal antibody (mAb) on Fractogel SO3(-)...
September 20, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29049048/urinary-excretion-of-yttrium-90-after-radioembolization-with-yttrium-90-labeled-resin-based-microspheres
#16
Oliver S Grosser, Juri Ruf, Annette Pethe, Dennis Kupitz, Heiko Wissel, Christoph Benckert, Maciej Pech, Jens Ricke, Holger Amthauer
In radioembolic therapy (RET) of hepatic malignancies using yttrium-90 (Y)-labeled resin microspheres, radiation protection is primarily concerned with avoiding contamination by radioactive spheres. However, as Y is bound to the microsphere surface by a potentially reversible ion-exchange process, the aim of this study was to assess the extent of the potential excreted activity in urine. After RET with Y-labeled resin-based microspheres, urinary excretion of free Y was prospectively analyzed in 51 interventions (n = 45 patients) by sampling urine over 48 h (two 24-h intervals) consecutively...
October 18, 2017: Health Physics
https://www.readbyqxmd.com/read/29040854/simultaneously-separation-of-xylo-oligosaccharide-and-lignosulfonate-from-wheat-straw-magnesium-bisulfite-pretreatment-spent-liquor-using-ion-exchange-resin
#17
Lei Liu, Jiwei Ren, Yitong Zhang, Xinlu Liu, Jia Ouyang
For wheat straw, an ideal bio-refinery process is that all three major components of biomass could be efficiently utilized to make high value chemicals, MBSP could directly convert the hemicelluloses and lignin into xylo-oligosaccharides and lignosulfonate. However, these value-added compounds still present in spent liquor and thus should be isolated as an individual product. In present work, a simple and efficient ion exchange process was developed for separating xylo-oligosaccharides and lignosulfonate simultaneously from spent liquor...
October 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28990530/isoform-separation-by-a-mixed-mode-resin-toyopearl-mx-trp-650m
#18
Tsutomu Arakawa
TOYOPEARL particles are cross-linked hydroxylated methacrylic polymers available in different pore and particle sizes. They are conjugated with different ligands to generate ion-exchange, hydrophobic interaction and affinity resins. They have excellent physical and chemical properties. A mixed-mode resin, TOYOPEARL MX-Trp-650M, is made of this particle with tryptophan conjugated via N-terminal amino group and hence has both hydrophobic/aromatic side chain and carboxyl group. In this review, I will summarize the properties of the TOYOPEARL particles and MX-Trp-650M resin and application of this resin for purification of proteins and in some detail the separation of disulfide (SS)-scrambled oligomers of insulin-like growth factor-1 (IGF-1)...
October 9, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28988306/nanoscale-wide-band-semiconductors-for-photocatalytic-remediation-of-aquatic-pollution
#19
Biplab Sarkar, Akshay Vishnu Daware, Priya Gupta, Kishore Kumar Krishnani, Sunandan Baruah, Surajit Bhattacharjee
Water pollution is a serious challenge to the public health. Among different forms of aquatic pollutants, chemical and biological agents create paramount threat to water quality when the safety standards are surpassed. There are many conventional remediatory strategies that are practiced such as resin-based exchanger and activated charcoal/carbon andreverse osmosis. Newer technologies using plants, microorganisms, genetic engineering, and enzyme-based approaches are also proposed for aquatic pollution management...
October 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28971358/preparation-and-evaluation-of-taste-masking-iron-suspension-taking-advantage-of-weak-cationic-exchange-resin
#20
Maryam Kouchak, Zahra Ramezani, Farid Bagheri
The objective of this study is to use weak acid cation exchange resin to mask the taste and eliminate the teeth staining problems of ferrous sulfate liquid preparations for use in pediatrics. Amberlite IPR64 was loaded by Fe(II). Then, different suspensions of the iron-resin complex were prepared using various polymers as the suspending agents, and sorbitol as well as sucrose as sweeteners. Physical stability, rheological assessment, kinetics of Fe(II) release, and taste evaluation of suspensions were studied...
October 2, 2017: AAPS PharmSciTech
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