نتایج جستجو برای: Potentiometrically

تعداد نتایج: 96  

Journal: :Journal of Materials Chemistry C 2021

Designing OECTs to amplify chemical redox reactions reliably requires: (1) separating reaction from the OECT (2) operating potentiometrically (3) utilizing non-polarizable gate electrode (4) maximizing transconductance of channel material.

Journal: :Journal of the Turkish Chemical Society, Section A: Chemistry 2023

N,N'-((dodecane-1,12-diylbis(azanediyl))bis(carbonothioyl))bis(4-nitrobenzamide) 5 and N,N'-((dodecane-1,12-diylbis(azanediyl))bis(carbonothioyl))bis(3-nitrobenzamide) 6 as bis acyl thiourea derivatives were synthesized their molecular structures characterized using 1H NMR, 13C COSY, DEPT, HMQC, FT-IR, HRMS techniques. The acid dissociation constants (pKa) of the bis-acyl 5, determined potentio...

Journal: :Clinical chemistry 1979
F Puttemans F Deconinck M Jonckheer M Vandeputte D L Massart

We compare results for iodine quantitation by x-ray fluorescence of excised thyroid glands with results of the quantitation by means of an original, newly developed chemical method, a Schöniger combustion technique, in which iodie is quantitated potentiometrically. Subsequently, we establish the accuracy and clinical suitability of the former technique in quantifying the intrathyroidal iodine.

2011
Fatih İslamoğlu Haydar Yüksek Mustafa Özdemir

Some 1,2,4-triazole derivatives were titrated potentiometrically with tetrabutylammonium hydroxide in four non-aqueous solvents such as isopropyl alcohol, N,N-dimethylformamide (DMF), tert-butyl alcohol and acetonitrile, and the half-neutralization potential values and the corresponding pKa values were determined for all cases.

Journal: :Chemical communications 2016
T V Shishkanova M Havlík M Dendisová P Matějka V Král

The development of novel diagnostic tools is a primary goal in bioanalytical chemistry. Here we report the synthesis of Tröger's base functionalized with amino- and coumarin-units designed as a monomeric unit for the development of an electrochemical cancer sensor. The synthesized receptor was deposited onto a conducting support using electrochemical polymerization, characterized spectroscopica...

Journal: :Journal of bacteriology 1978
D C Yoch R P Carithers

The high-potential 4Fe-4S* center ofAzotobacter vinelandii ferredoxin I has been titrated potentiometrically by a reductive procedure. The absorbance decrease at 510 nm accompanying the reduction of the high-potential center titrated with an Em of 320 mV (n = 1). The low-potential 4Fe-4S* center was titrated by using the absorbance decrease at 410 nm to monitor its reduction. This center exhibi...

2002
W Czarnowski B Wielgomas J Krechniak

A passive dosimeter designed to measure exposure to hydrogen fluoride was tested under laboratory conditions over the concentration range of 0.56 – 4.47 mg HF/m. The lowest concentration was chosen to be close to the Polish TLV (0.5 mg HF/m). The dosimeter consists of a Whatman No.1 filter paper impregnated with K2HPO4 placed in a polyethylene holder protected by a polyethylene screen. After ex...

2002
Alena Novoselova Vladimir Khokhlov Vladimir Shishkin

The formal standard redox potentials of samarium (III)/(II) (EZmi+/ Smi+) and europium (III)/(II) (•£,£u3+/eu2+ ) *n molten alkali metal chlorides were measured potentiometrically against a reference chlorine electrode. The Gibbs energy changes and equilibrium constants for the reaction LnCl2(D + V2 Cl2(g) LnCl3(I) were calculated for the salt systems studied. The effect of the cationic composi...

Journal: :Caucasian journal of science 2022

In this study, the effects of solvents and molecular structure upon acidity, five 3-alkyl(aryl)-4-phthalimido-4,5-dihydro-1H-1,2,4-triazol-5-ones (3-7) were potentiometrically titrated with tetrabutylammonium hydroxide (TBAH) in four different anhydrous (isopropyl alcohol, acetonitrile, tert-butyl alcohol N,N-dimethylformamide) HNP corresponding pKa values determined by half-neutralization meth...

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