keyword
MENU ▼
Read by QxMD icon Read
search

ion exchange resin

keyword
https://www.readbyqxmd.com/read/28523725/differential-attenuation-of-nmr-signals-by-complementary-ion-exchange-resin-beads-for-de-novo-analysis-of-complex-metabolomics-mixtures
#1
Jiaqi Yuan, Bo Zhang, Rafael Bruschweiler
A primary goal of metabolomics is the characterization of a potentially very large number of metabolites that are part of complex mixtures. Application to biofluids and tissue samples offers insights into biochemical metabolic pathways and their role in health and disease. 1D 1H and 2D 13C-1H HSQC NMR spectra are most commonly used for this purpose. They yield quantitative information about each proton of the mixture, but not which protons belong to the same molecule. Interpretation requires the use of NMR spectral databases naturally limited to known metabolites...
May 18, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28501995/one-step-preservation-and-decalcification-of-bony-tissue-for-molecular-profiling
#2
Claudius Mueller, Michael G Harpole, Virginia Espina
Bone metastasis from primary cancer sites creates diagnostic and therapeutic challenges. Calcified bone is difficult to biopsy due to tissue hardness and patient discomfort, thus limiting the frequency and availability of bone/bone marrow biopsy material for molecular profiling. In addition, bony tissue must be demineralized (decalcified) prior to histomorphologic analysis. Decalcification processes rely on three main principles: (a) solubility of calcium salts in an acid, such as formic or nitric acid; (b) calcium chelation with ethylenediaminetetraacetic acid (EDTA); or (c) ion-exchange resins in a weak acid...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28494246/catalytic-hydrodechlorination-of-triclosan-using-a-new-class-of-anion-exchange-resin-supported-palladium-catalysts
#3
Bing Han, Wen Liu, Jingwen Li, Jin Wang, Dongye Zhao, Rui Xu, Zhang Lin
We prepared a new class of anion-exchange-resin supported Pd catalysts for efficient hydrodechlorination of triclosan in water. The catalysts were prepared through an initial ion-exchange uptake of PdCl4(2-) and subsequent reduction of Pd(II) to Pd(0) nanoparticles at ambient temperature. Two standard strong-base anion exchange resins (IRA-900 and IRA-958) with different matrices (polystyrene and polyacrylic) were chosen as the supports. SEM and TEM images showed that Pd(0) nanoparticles were evenly attached on the resin surface with a mean size of 3-5 nm...
April 26, 2017: Water Research
https://www.readbyqxmd.com/read/28488858/development-of-a-high-throughput-ion-exchange-resin-characterization-workflow
#4
Chun Liu, Daniel Dermody, Keith Harris, Thomas Boomgaard, Jeff Sweeney, Daryl Gisch, Bob Goltz
A novel high-throughout (HTR) ion-exchange (IEX) resin workflow has been developed for characterizing ion exchange equilibrium of commercial and experimental IEX resins against a range of different applications where water environment differs from site to site. Because of its much higher throughput, design of experiment (DOE) methodology can be easily applied for studying the effects of multiple factors on resin performance. Two case studies will be presented to illustrate the efficacy of the combined HTR workflow and DOE method...
May 18, 2017: ACS Combinatorial Science
https://www.readbyqxmd.com/read/28478689/micropellets-coated-with-kollicoat%C3%A2-smartseal-30d-for-taste-masking-in-liquid-oral-dosage-forms
#5
Andriy Dashevskiy, Valentyn Mohylyuk, Abid Riaz Ahmed, Karl Kolter, Felicitas Guth, Roland Bodmeier
The objective of this study was to develop delivery systems for taste masking based on multiparticulates coated with Kollicoat(®) Smartseal 30 D formulated as liquid oral suspensions. Coating of particles containing bitter drugs with Kollicoat(®) Smartseal reduced drug leaching into aqueous medium, especially when increasing pH, therefore can be used for the formulation of liquid dosage forms. Application of an intermediate layer of ion exchange resins between drug layer and coating can further decrease drug leaching into aqueous vehicle that is beneficial in terms of taste masking...
May 8, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28467072/photoinitiated-polymerization-of-4-vinylpyridine-on-polyhipe-foam-surface-toward-improved-pu-separations
#6
Julia Pribyl, Brock Fletcher, Warren Steckle, Kathryn Taylor-Pashow, Thomas Shehee, Brian Benicewicz
The separation of hazardous metals from contaminated sources is commonly achieved with ion-exchange resins. The resins have a high surface area decorated with many ion-exchange sites and thus a high sorption capacity for the analyte of interest. However, these sites are primarily accessed by diffusion which limits the throughput and quality of the separation. Reported herein is a study of monolithic polyHIPE foam columns surface-grafted with a brush of polymer containing ion-exchange functionality for the separation of Pu...
May 3, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28444369/three-dimensional-intracellular-structure-of-a-whole-rice-mesophyll-cell-observed-with-fib-sem
#7
Takao Oi, Sakiko Enomoto, Tomoyo Nakao, Shigeo Arai, Koji Yamane, Mitsutaka Taniguchi
Background and Aims: Ultrathin sections of rice leaf blades observed two-dimensionally using a transmission electron microscope (TEM) show that the chlorenchyma is composed of lobed mesophyll cells, with intricate cell boundaries, and lined with chloroplasts. The lobed cell shape and chloroplast positioning are believed to enhance the area available for the gas exchange surface for photosynthesis in rice leaves. However, a cell image revealing the three-dimensional (3-D) ultrastructure of rice mesophyll cells has not been visualized...
April 21, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28427006/regeneration-of-pilot-scale-ion-exchange-columns-for-hexavalent-chromium-removal
#8
Julie A Korak, Richard Huggins, Miguel Arias-Paic
Due to stricter regulations, some drinking water utilities must implement additional treatment processes to meet potable water standards for hexavalent chromium (Cr(VI)), such as the California limit of 10 μg/L. Strong base anion exchange is effective for Cr(VI) removal, but efficient resin regeneration and waste minimization are important for operational, economic and environmental considerations. This study compared multiple regeneration methods on pilot-scale columns on the basis of regeneration efficiency, waste production and salt usage...
July 1, 2017: Water Research
https://www.readbyqxmd.com/read/28424955/erratum-to-study-of-plasma-off-gas-treatment-from-spent-ion-exchange-resin-pyrolysis
#9
Hernán Ariel Castro, Vittorio Luca, Hugo Luis Bianchi
No abstract text is available yet for this article.
April 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28412714/reprogramming-towards-totipotency-is-greatly-facilitated-by-synergistic-effects-of-small-molecules
#10
Kei Miyamoto, Yosuke Tajima, Koki Yoshida, Mami Oikawa, Rika Azuma, George E Allen, Tomomi Tsujikawa, Tomomasa Tsukaguchi, Charles R Bradshaw, Jerome Jullien, Kazuo Yamagata, Kazuya Matsumoto, Masayuki Anzai, Hiroshi Imai, John B Gurdon, Masayasu Yamada
Animal cloning has been achieved in many species by transplanting differentiated cell nuclei to unfertilized oocytes. However, the low efficiencies of cloning have remained an unresolved issue. Here we find that the combination of two small molecules, trichostatin A (TSA) and vitamin C (VC), under culture condition with bovine serum albumin deionized by ion-exchange resins, dramatically improves the cloning efficiency in mice and 15% of cloned embryos develop to term by means of somatic cell nuclear transfer (SCNT)...
April 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28408043/a-review-on-solid-phase-extraction-of-actinides-and-lanthanides-with-amide-based-extractants
#11
REVIEW
Seraj A Ansari, Prasanta K Mohapatra
Solid phase extraction is gaining attention from separation scientists due to its high chromatographic utility. Though both grafted and impregnated forms of solid phase extraction resins are popular, the later is easy to make by impregnating a given organic extractant on to an inert solid support. Solid phase extraction on an impregnated support, also known as extraction chromatography, combines the advantages of liquid-liquid extraction and the ion exchange chromatography methods. On the flip side, the impregnated extraction chromatographic resins are less stable against leaching out of the organic extractant from the pores of the support material...
March 19, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28405055/stability-of-a-benzyl-amine-based-co2-capture-adsorbent-in-view-of-regeneration-strategies
#12
Qian Yu, Jorge de la P Delgado, Rens Veneman, Derk W F Brilman
In this work, the chemical and thermal stability of a primary amine-functionalized ion-exchange resin (Lewatit VP OC 1065) is studied in view of the potential options of regenerating this sorbent in a CO2 removal application. The adsorbent was treated continuously in the presence of air, different O2/CO2/N2 mixtures, concentrated CO2, and steam, and then the remaining CO2 adsorption capacity was measured. Elemental analysis, BET/BJH analysis, Fourier transform infrared spectroscopy, and thermogravimetric analysis were applied to characterize adsorbent properties...
March 29, 2017: Industrial & Engineering Chemistry Research
https://www.readbyqxmd.com/read/28402305/the-binding-of-metal-ions-to-molecularly-imprinted-polymers
#13
Rukshan Perera, Syed Ashraf, Anja Mueller
Imprinting polymerization is a flexible method to make resins specific for different compounds. Imprinting polymerization involves the polymerization of the resin in the presence of a template, here cadmium ions or arsenate. The template is then removed by washing, leaving specific binding sites in the resin. In water treatment, the removal of toxic metal ions is difficult due to the limited affinity of these ions to ion exchange resins. Imprinting polymerization of ion-exchange resins is used to develop resins with high capacity and some selectivity for cadmium ions or arsenate for water treatment that still function as general ion-exchange resins...
April 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28398709/continuous-desalting-of-refolded-protein-solution-improves-capturing-in-ion-exchange-chromatography-a-seamless-process
#14
Nicole Walch, Alois Jungbauer
Truly continuous biomanufacturing processes enable an uninterrupted feed stream throughout the whole production without the need for holding tanks. We have utilized microporous anion and cation exchangers into which only salts, but not proteins, can penetrate into the pores for desalting of protein solutions, while diafiltration or dilution is usually employed for feed adjustments. Anion exchange and cation exchange chromatography columns were connected in series to remove both anions and cations. To increase operation performance, a continuous process was developed comprised of four columns...
April 11, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28391925/removal-of-perfluorinated-surfactants-from-wastewater-by-adsorption-and-ion-exchange-influence-of-material-properties-sorption-mechanism-and-modeling
#15
Falk Schuricht, Ekaterina S Borovinskaya, Wladimir Reschetilowski
Perfluorooctane sulfonate (PFOS) has attracted increasing concern in recent years due to its world-wide distribution, persistence, bioaccumulation and potential toxicity. The influence of sorbent properties on the adsorptive elimination of PFOS from wastewater by activated carbons, polymer adsorbents and anion exchange resins was investigated with regard to their isotherms and kinetics. The batch and column tests were combined with physicochemical characterization methods, e.g., N2 physisorption, mercury porosimetry, infrared spectroscopy, differential scanning calorimetry, titrations, as well as modeling...
April 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28382442/submerged-membrane-adsorption-hybrid-system-using-four-adsorbents-to-remove-nitrate-from-water
#16
Mahatheva Kalaruban, Paripurnanda Loganathan, Jaya Kandasamy, Saravanamuthu Vigneswaran
Nitrate contamination of ground and surface waters causes environmental pollution and human health problems in many parts of the world. This study tests the nitrate removal efficiencies of two ion exchange resins (Dowex 21K XLT and iron-modified Dowex 21K XLT (Dowex-Fe)) and two chemically modified bio-adsorbents (amine-grafted corn cob (AG corn cob) and amine-grafted coconut copra (AG coconut copra)) using a dynamic adsorption treatment system. A submerged membrane (microfiltration) adsorption hybrid system (SMAHS) was used for the continuous removal of nitrate with a minimal amount of adsorbents...
April 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28363158/evaluation-of-the-separation-and-purification-of-227-th-from-its-decay-progeny-by-anion-exchange-and-extraction-chromatography
#17
P I Ivanov, S M Collins, E M van Es, M García-Miranda, S M Jerome, B C Russell
Thorium-227 is currently undergoing evaluation as a potential radionuclide for targeted cancer therapy, and as such a high chemical purity of the material is required. To establish a reliable procedure for radiochemical isolation of (227)Th from the parent (227)Ac and decay progeny, which includes the radiotherapeutic (223)Ra, the performance of three different separation schemes based on ion-exchange and extraction chromatography have been evaluated. The results suggest that both ion exchange and extraction chromatographic techniques can be successfully used for the separation of (227)Th from its decay progeny, however extraction chromatographic resins demonstrate favourable performance in terms of Th recovery and purification from radionuclide impurities...
March 23, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28355586/simultaneous-removal-of-thallium-and-chloride-from-a-highly-saline-industrial-wastewater-using-modified-anion-exchange-resins
#18
Huosheng Li, Yongheng Chen, Jianyou Long, Daqian Jiang, Juan Liu, Sijie Li, Jianying Qi, Ping Zhang, Jin Wang, Jian Gong, Qihang Wu, Diyun Chen
Simultaneous removal of thallium (Tl) and chloride from a highly saline industrial wastewater was investigated using modified anion ion exchange resins. The removal of thallium was mainly driven by the exchange of Tl-chlorocomplex (TlCl4(-)) formed in the oxidation of thallous (Tl (I)) to thallic ion (Tl (III)) by hydrogen peroxide (H2O2) under saline conditions. Over 97% of thallium and chloride removal was achieved using the modified resins, with a wide optimal conditions found to be H2O2 dosage 1.0-25.0mL/L, pH 1...
March 11, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28341379/the-rapid-adsorption-microbial-reduction-of-perchlorate-from-aqueous-solution-by-novel-amine-crosslinked-magnetic-biopolymer-resin
#19
Wen Song, Baoyu Gao, Hailan Wang, Xing Xu, Moxi Xue, Minchao Zha, Bo Gong
The aim of this work was to study the adsorption characters of resin, microbial reduction of perchlorate and combined process of perchlorate removal in aqueous solution. Study demonstrated the adsorption equilibrium was achieved in 120min, which based on ion exchange reaction. Dissolved perchlorate (100mg/L) can be completely removed by acclimated anaerobic sludge in 15h, and the concentrated perchlorate (∼200mg/g) on the surface of resin would be effectively microbial reduced after 3days. Neutral environment (pH=7...
March 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28340775/quantification-of-226-ra-at-environmental-relevant-levels-in-natural-waters-by-icp-ms-optimization-validation-and-limitations-of-an-extraction-and-preconcentration-approach
#20
François Lagacé, Delphine Foucher, Céline Surette, Olivier Clarisse
Radium (Ra) at environmental relevant levels in natural waters was determined by ICP-MS after an off-line pre-concentration procedure. The latter consisted of Ra selective elution from potential interfering elements (i.e. other alkaline earth cations: Ba(2+), Sr(2+), Ca(2+), Mg(2+)) on a series of two different ion exchange resins (AG50W-X8 and Sr-resin). The overall analytical method was optimized according to the instrumental performance, the volume of water sample loaded on resins, and the sample salinity...
May 15, 2017: Talanta
keyword
keyword
42901
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"