Conformational changes in humic acids in aqueous solutions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F12%3APU99000" target="_blank" >RIV/00216305:26310/12:PU99000 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Conformational changes in humic acids in aqueous solutions

Original language description

Conformational changes in humic acids in two different aqueous solutions (NaCl and NaOH) are studied by means of high resolution ultrasound spectrometry. The method is based on the measurement of parameters of ultrasonic waves propagating through the sample. The attenuation describes the decay of the amplitude of the ultrasonic wave with the distance travelled. The velocity is the speed of this wave and is related to the wavelength and the frequency of oscillation of the deformation. It is determined bythe density and elasticity of the sample, which is strongly influenced by the molecular arrangement. The minimal velocity of ultrasound was observed at 1 g/dm3 for lignitic humic acids and at 0.5 g d/m3 for IHSS Leonardite standard. The values of compressibility as computed are almost constant up to humic acids content corresponding to the minimum velocity of ultrasound and then decrease with the increase in concentration. This shows that the organisation of particles in diluted and con

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

<a href="/en/project/GA104%2F08%2F0990" target="_blank" >GA104/08/0990: Ultrasound spectroscopy in study of complexation of humic substances</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Chemical Papers

ISSN

0366-6352

e-ISSN

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Volume of the periodical

66

Issue of the periodical within the volume

9

Country of publishing house

SK - SLOVAKIA

Number of pages

6

Pages from-to

875-880

UT code for WoS article

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EID of the result in the Scopus database

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