Articles - Analytical and Bioanalytical Chemistry

Open Access Research Article Article ID: OJABC-3-112

Analysis are of the hidden properties of the macromolecular system as an example of the reaction centers of bacteria Rhodobacter sphaeroides

10.17352/ojabc.000012

Published On: September 17, 2019 | Pages: 057 - 064

Author(s): YM Barabash*, TV Serdenko, PP Knox and OYu Bondarenko

Relevant: Is the study of the response of biological macromolecules to external stimuli. Often the reaction of macromolecules has an effect of structural self-regulation. In this case, their reaction is not only external infl uence, but also the spatial-temporal motions of the macromolecule. In this situation deserves the attention of electronic-conformational interac ... CrossMark Publons Harvard Library HOLLIS Search IT Semantic Scholar Get Citation Base Search Scilit OAI-PMH ResearchGate GrowKudos

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Open Access Research Article Article ID: OJABC-3-111

Potentiometric sensing platform for selective determination of Pregabalin in pharmaceutical formulations

10.17352/ojabc.000011

Published On: September 05, 2019 | Pages: 049 - 056

Author(s): Eman H El-Naby*

Pregabalin is a structural analogue of, but functionally unrelated to, the naturally occurring neurotransmitter -aminobutyric acid (GABA) with potent analgesic, anticonvulsant and anxiolytic activity. The abuse potential of pregabalin is a well-documented with high risk of addiction that may be fatal with overdoses particularly, among opiate addicts and polydrug use ... CrossMark Publons Harvard Library HOLLIS Search IT Semantic Scholar Get Citation Base Search Scilit OAI-PMH ResearchGate GrowKudos

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Open Access Research Article Article ID: OJABC-3-109

HPLC-DAD method for simultaneous determination of natural polyphenols

10.17352/ojabc.000009

Published On: August 08, 2019 | Pages: 039 - 043

Author(s): Vanya Dimcheva*, Nikolay Kaloyanov, Maria Karsheva, Milena Funeva-Peycheva and Nadezhda Stoilova

A simple and reliable high-performance liquid chromatography with diode-array detection (HPLC-DAD) method was developed for simultaneous determination of 9 natural substances common in plants: three major catechins ((-) - epicatechin gallate, (-) - catechin, (-) - epigallocatechin), four major flavonoids (rutin, quercetin, myricetin, kaempferol), gallic and vanillic a ... CrossMark Publons Harvard Library HOLLIS Search IT Semantic Scholar Get Citation Base Search Scilit OAI-PMH ResearchGate GrowKudos

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Open Access Research Article Article ID: OJABC-3-108

The polyphenol composition of Cistus incanus L., Trachystemon orientalis L. and Melissa officinalis L. infusions by HPLC-DAD method

10.17352/ojabc.000008

Published On: August 07, 2019 | Pages: 031 - 038

Author(s): Vanya Dimcheva*, Nikolay Kaloyanov and Maria Karsheva

Because of plants, health benefi ts consumption of herbal infusions as a dietary additive has increased in the last years. ... CrossMark Publons Harvard Library HOLLIS Search IT Semantic Scholar Get Citation Base Search Scilit OAI-PMH ResearchGate GrowKudos

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Open Access Research Article Article ID: OJABC-3-107

Further remarks on the new criterion differentiating between Non-Redox and Redox Electrolytic Systems

Published On: July 16, 2019 | Pages: 018 - 030

Author(s): Anna M Michałowska-Kaczmarczyk, Tadeusz Michałowski*

The new general criterion, distinguishing between non-redox and redox electrolytic systems, is based on the properties of the linear combination f12 = 2∙f(O) – f(H) of elemental balances: f1 = f(H) for Y1 = H, and f2 = f(O) for Y2 = O. The f12 is the primary form of the Generalized Electron Balance (f12 = prGEB), completing the set of balances needed to formulate a re ... CrossMark Publons Harvard Library HOLLIS Search IT Semantic Scholar Get Citation Base Search Scilit OAI-PMH ResearchGate GrowKudos

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Open Access Research Article Article ID: OJABC-3-106

General properties of the balance 2.f(O) – f(H) in electrolytic systems some detailed remarks on elemental versus core balances

Published On: July 16, 2019 | Pages: 006 - 017

Author(s): Anna M Michałowska-Kaczmarczyk1, Tadeusz Michałowski2*

Any electrolytic system in aqueous media is described with use of charge balance, f0 = ChB, and K elemental or core balances, fk = f(Yk) (k = 1,…,K). The balances: f1 = f(H) and f2 = f(O) are the basis to formulate the linear combination f12 = 2.f2 – f1 = 2.f(O) – f(H). For a redox system with K – K* electronactive elements (players), f12 is linearly independent on ... CrossMark Publons Harvard Library HOLLIS Search IT Semantic Scholar Get Citation Base Search Scilit OAI-PMH ResearchGate GrowKudos

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Open Access Research Article Article ID: OJABC-3-105

Determination of pyridoxine by means of an indicator diazo-test strip

10.17352/ojabc.000005

Published On: June 28, 2019 | Pages: 001 - 005

Author(s): Vera M Ostrovskaya, Alexander V Ivanov* and Dmitry Yu Marchenko

Pyridoxine (vitamin B6) plays an important role in the body’s metabolism. Reaction of azocoupling with diazoaryl compound underlies in a basis a known photometric method of its chemical analysis. This method is not selective. In the present work the test method of determination of the pyridoxine containing in a molecule hydroxyarylgroup, was proposed by them azocoupli ... CrossMark Publons Harvard Library HOLLIS Search IT Semantic Scholar Get Citation Base Search Scilit OAI-PMH ResearchGate GrowKudos

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