نتایج جستجو برای: potentiometric method

تعداد نتایج: 1632258  

Journal: :Carbohydrate research 2005
Yongqin Zhang Changhu Xue Yong Xue Ruichang Gao Xiuli Zhang

A new method to determine the degree of deacetylation (DD) of alpha-chitin and chitosan in the range of 17-94% DD using X-ray powder diffraction (XRD) is proposed. The results were calibrated using (1)H NMR spectroscopy for chitosan and FTIR for chitin, in comparison with the potentiometric titration method. The results showed a good linear correlation between the CrI020 from XRD and the calibr...

Journal: :Analytical chemistry 2013
Hong Liu Richard M Crooks

We report a potentiometric method for measuring the hemoglobin A1c (HbA1c, glycated hemoglobin) concentration, hemoglobin (Hb) concentration, and percent HbA1c (%HbA1c) in human blood hemolysate. The %HbA1c is important for diagnosis and management of diabetes mellitus. Alizarin red s (ARS) is used as a redox indicator. Phenylboronic acid (PBA) binds to both ARS and HbA1c via diol-boronic acid ...

Journal: :Molecules 2015
Ulrike Weinert Katrin Pollmann Astrid Barkleit Manja Vogel Tobias Günther Johannes Raff

Chemical functional groups of surface layer (S-layer) proteins were chemically modified in order to evaluate the potential of S-layer proteins for the introduction of functional molecules. S-layer proteins are structure proteins that self-assemble into regular arrays on surfaces. One general feature of S-layer proteins is their high amount of carboxylic and amino groups. These groups are potent...

Journal: :Biosensors & bioelectronics 2008
Yantian Wang Yanxiu Zhou Jonathon Sokolov Basil Rigas Kalle Levon Miriam Rafailovich

Surface molecular imprinting, as compared to molecular imprinted bulk polymers, has the advantages of higher re-occupation percentage of the reception sites, fast response, integration of sensing element and transducer, etc. In this study, a potentiometric protein sensor was developed based on the surface molecular imprinting technique. Using the self-assembled monolayers of alkanethiol with hy...

2015
Oleksandr O Soldatkin Margaryta K Shelyakina Valentyna N Arkhypova Esin Soy Salih Kaan Kirdeciler Berna Ozansoy Kasap Florence Lagarde Nicole Jaffrezic-Renault Burcu Akata Kurç Alexei P Soldatkin Sergei V Dzyadevych

A number of potentiometric biosensors based on coimmobilization of enzymes with different types of zeolite on pH-ion-sensitive field-effect transistor (ISFET) have been developed. Their working characteristics have been determined and compared. It was shown that clinoptilolite and zeolite Beta polymorph A (BEA) are more promising for creating biosensors than zeolite A. Changing the concentratio...

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