MAGEE. T. V., and D. F. ZINKEL. 1986. A rapid method for diterpene resin acid analysis of pine needle oleoresin. Can. J. For. Res. 16: 1107-1109. A method for diterpene resin acid analysis has been developed for pine oleoresin samples at the submilligram level. The method utilizes the removal of acidic components by a micro-DEAE-Sephadex ion-exchange column and analysis of the recovered resin a...

Background: In this study we have prepared the IgA solution from normal human plasma using plasma fractionation and ion exchange chromatography. Materials and Methods: Using fractionation of plasma with cold ethanol (starting with 8% ethanol), fraction III was prepared as a suitable source for IgA preparation. Then it was treated with caprylic acid for separation of impurities. For enrichm...

The insecticidal ingredient in a biogas solution being fully utilized by cation exchange resin to produce slow-release insecticide is of great social value. In this work, the feasibility ammonia nitrogen slurry loaded on as was evaluated studying effect adsorption and slow release resin. effects concentration, dosage, time pH value were studied. results showed that ion had good nitrogen. With i...

A polymeric ion-exchange resin, incorporating methyl-amino-phosphonic (TP260) functionalities, and a solvent impregnated resin (SIR) tri-methylpentylphosphinic acid (TP272), were evaluated for the selective separation of Rare Earth Elements (REE) from Transition (TE), post -Transition (PTE), Alkaline (AE) in acidic mine waters (AMW). The influence functional groups nature acidity dependence stu...

statement of problem: bioglasses are a series of biocompatible dental materials, which are considered as light conducting inserts in resin composite restorations. consequently, their chemical stability is more essential when they are used in conjunction with resin composite. objectives: the aim of this study was to evaluate and compare the chemical stability of bioglass with dental porcelain an...

BACKGROUND There have been numerous attempts to demonstrate the phenomenon of ion exchange between auto cure glass ionomer cements (GICs) and dentine. The purpose of this study was to employ an electron probe microanalysis (EPMA) technique to examine the interchange of elements between non-demineralized dentine and two types of restorative material, auto cure GICs and a resin composite. METHO...

STATEMENT OF PROBLEM Bioglasses are a series of biocompatible dental materials, which are considered as light conducting inserts in resin composite restorations. Consequently, their chemical stability is more essential when they are used in conjunction with resin composite. OBJECTIVES The aim of this study was to evaluate and compare the chemical stability of Bioglass with dental porcelain an...

m-Iodosylbenzoic acid performs iodinations of arenes in the presence of iodine at room temperature in acetonitrile. Separation of pure products is conveniently achieved by scavenging any aryl iodide by ion exchange with IRA-900 (hydroxide form). The reduced form of the reagent, m-iodobenzoic acid, can be easily recovered from the ion exchange resin or from the basic aqueous solution by simple a...