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Showing 1 to 20 of 265 for “"Cation Exchange"”.
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An investigation of cation-exchange in aqueous pyridine
… presents a comparative investigation of the ion-exchange behaviour of a typical carboxylic acid resin, Amberlite IRC 50, and a typical sulphonic acid resin Zeo-Karb 225, in aqueous and aqueous pyridine solutions of the alkaline earth metal cations. The ion-exchange phenomena investigated …
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The reactivity and cation exchange of MOF-5
… MOF-5 can be derivatized with redox-active cations for subsequent use in coordination chemistry and small-molecule activation. Rather than reproduce known metal species, this work harnesses the intrinsic properties of the MOF-5 lattice to isolate species that are difficult or impossible to …
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Engineering Nanocrystal Devices Through Cation Exchange And Surface Modifications
… of materials and device design and fabrication process, and efforts are needed to replace the toxic elements found in the most studied NC compositions for many device applications. In this thesis, we develop solution-processable, all NC field-effect transistors (FETs) with metallic (Ag, …
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Selective cation-exchange adsorption of the two major whey proteins
… nutritional, biological and food ingredient applications. A tremendous amount of whey, normally treated as a waste product, is produced worldwide each year. This work describes the cation-exchange adsorption of the two major whey proteins, alpha-lactalbumin (ALA) and beta-lactoglobulin (BLG) with …
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Hydrolysis of aluminum in synthetic cation exchange resins and dioctahedral vermiculite
The hydrolysis of aluminum in synthetic cation exchange resins differing in charge density was evaluated after treating aluminum and potassium saturated resins with solutions of hydrolyzed aluminum. Fixed aluminum and decrease in exchange capacity were used to calculate the OH/Al ratio of the fixed …
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Determination of Atrazine and Selected Respective Metabolites Using Strong Cation Exchange Resins
… for polar analytes. In this study strong cationic exchange (SCX) resins consisting of sulfonated polystyrene are investigated for their extraction capabilities of the selected analytes. By exploiting acid-base and pi-pi interactions the analytes are trapped and therefore extracted from …
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Single nanocrystal microscopy and spectroscopy unveils hidden mechanistic information in cation exchange
… nanocrystal. In my PhD studies, I have used cation exchange as a model reaction to investigate nanoscale reactivity using single-nanoparticle-resolved optical microscopy techniques. Cation exchange is possibly the most revolutionary chemical method for nanocrystal synthesis. This class of …
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Turning InP nanocrystals up to 11: Coinage Metal Cation Exchange in InP Nanocrystals
Cation exchange is a powerful method to expand the versatility and properties of a semiconductor nanocrystal. By tuning the amount of exogenous cation a spectrum of new materials can be accessed, including doped nanoparticles, alloyed nanocrystals, and even fully exchanged nanomaterials that may be …
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LITERATURE REVIEW: The Use of Cation-Exchange Resins in Natural Water Trace Metals Research. ARTICLE: Determination of Free Ion Trace Metal Concentrations in Freshwaters Using Cation-Exchange Resin Equilibrium. A Preliminary Investigation.
… ligands and colloidal surfaces. Use of cation exchange resins, particularly Chelex-100, has been developed over the past few decades and enables preconcentration to yield, upon elution, measurable concentrations of trace metals. These resins can also yield data on the speciation (by …
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AUTOMATION MODEL FOR pH AND CONDUCTIVITY ADJUSTMENT FOR A CATION EXCHANGE COLUMN ELUATE BUFFER
… for a buffer solution added to the eluate of a cation exchange column at Bayer Healthcare has been developed. Bayer Healthcare's Berkeley facility manufacturess Kogenate - a drug for Hemophilia. This project was carried out at one of the intermediate purification steps of Kogenate, where the pH …
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Ethyl isopropyl ether (EIPE) synthesis over cation exchange resins: catalyst evaluation and reaction kinetics
Includes bibliographical references (pages 122-127).
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Dry preservation of heavy metal contaminants using cation exchange resins for improved water quality monitoring
… field work, dry sampling sorbent identification and selection, kinetic parameter testing of the dry sampling sorbent, lab contaminant recovery protocol development and initial dry sampling device design for the dry storage of heavy metal cation contaminants. Heavy metals, such as lead, …
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Investigation of Temperature, Solution Strength, and Applied Stress Effects on Cation Exchange Processes in Geosynthetic Clay Liners
… stress over increasing conditioning durations on cation exchange processes in sodium bentonite (Na-B) geosynthetic clay liners (GCLs). The test program was intended to determine if the variables of temperature, solution strength, and applied stress had beneficial or detrimental effects on the …
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Multiscale Tortuous Diffusion in Anion- and Cation-Exchange Membranes: Exploration of Counterions, Water Content, and Polymer Functionality
… water transport measurements comparing anion-exchange membranes (AEMs) based on ammonium-functionalized poly(phenylene oxide) and cation-exchange membranes (CEMs) based on sulfonated poly(ether sulfone). We investigate the influence of counter ions, alkyl side chain, and degree of …
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Potassium availability in Parsons silt loam as influenced by soil drying and alteration of the cation exchange capacity
Call number: LD2668 .T4 1957 R43
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Potassium availability in Parsons silt loam as influenced by soil drying and alteration of the cation exchange capacity
Call number: LD2668 .T4 1957 R43
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Effects of certain fertilizer and manurial treatments on the cation exchange properties and organic matter content of dunmore silt loam
… of the pH, organic matter content, and cation exchange properties of the soil of the 26-year-old rotation and continuously cropped plots at Blacksburg, Virginia was carried out. Individual soil samples were taken of the eight sub-plots which represent each plot. After the chemical work …
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