Conformational changes in humic acids in aqueous solutions

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Conformational changes in humic acids in aqueous solutions

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

Conformational changes in humic acids in aqueous solutions

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA104%2F08%2F0990" target="_blank" >GA104/08/0990: Ultrazvuková spektroskopie ve studiu komplexace huminových látek</a><br>

Návaznosti

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

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Chemical Papers

ISSN

0366-6352

e-ISSN

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Svazek periodika

66

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

6

Strana od-do

875-880

Kód UT WoS článku

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EID výsledku v databázi Scopus

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