نتایج جستجو برای: ion exchange phase

تعداد نتایج: 955053  

Journal: :iranian journal of pharmaceutical research 0
hongfei liu jiangsu university shuangshuang shi jiangsu university weisan pan shenyang pharmaceutica university changshan sun shenyang pharmaceutical university xiaomian zou shenyang pharmaceutical university min fu jiangsu university

the main objective of this study was to investigate biocompatibility and provide in vivo pharmacological and toxicological evidence for further investigation of the possibility of ph sensitive ion exchange resin microsphere for clinical utilizations. acute toxicity study and general pharmacological studies were conducted on the ph sensitive ion exchange resin microsphere we prepared. the genera...

Journal: :The Journal of the Society of Chemical Industry, Japan 1971

2015
Helen S. Beeston James R. Ault Steven D. Pringle Jeffery M. Brown Alison E. Ashcroft

The study of protein conformation by solution-phase hydrogen/deuterium exchange (HDX) coupled to MS is well documented. This involves monitoring the exchange of backbone amide protons with deuterium and provides details concerning the protein's tertiary structure. However, undesired back-exchange during post-HDX analyses can be difficult to control. Here, gas-phase HDX-MS, during which labile h...

2005
J. Zhang A. Kamenev B. I. Shklovskii

Ion transport through narrow water–filled channels is impeded by a high electrostatic barrier. The latter originates from the large ratio of the dielectric constants of the water and a surrounding media. We show that “doping”, i.e. immobile charges attached to the walls of the channel, substantially reduces the barrier. This explains why most of the biological ion channels are “doped”. We show ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور 1387

چکیده ندارد.

A hydrmetallurgical study based on the extraction of Zn and Pb from a Nigerian sphalerite mineral leached with 4 M hydrochloric acid has been undertaken. Triphenylphosphite (TPP) has proved to be very effective for the extraction of zinc. With 2 M TPP and at ambient temperature of 25±2°C; 35.71% and 66.7% of Pb and Zn were extracted, respectively, into the organic phase within 60 min. The recov...

2016
George H. Beall Monique Comte Matthew J. Dejneka Paulo Marques Philippe Pradeau Charlene Smith

In the past few years, ion-exchange (IOX) in glasses has found a renewed interest with a lot of new development and research in industrial and academic labs and the commercialization of materials with outstanding mechanical properties. These glasses are now widely used in many electronic devices, including hand-held displays and tablets. The exchange is generally conducted in a bath of molten s...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2012
Lee Wah Lim Li Rong Toyohide Takeuchi

The present article reviews the use of polyethylene glycol (PEG) or polyoxyethylene (POE) as the stationary phase for the separation of inorganic anions in ion chromatography and discusses about the retention mechanisms involved in the separation of anions on the novel stationary phases. PEG permanently coated on a hydrophobic stationary phase retained anions in the partition mode and allowed ...

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