Conformational Changes in Aqueous Solutions of Humic Acids

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F11%3APU94238" target="_blank" >RIV/00216305:26310/11:PU94238 - 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 Aqueous Solutions of Humic Acids

Popis výsledku v původním jazyce

Conformational changes of humic acids in two different aqueous solutions (NaCl and NaOH) are studied by means of High Resolution Ultrasound Spectrometry. It is based on the measurement of parameters of ultrasonic waves propagating through the sample. Attenuation describes the decay of the amplitude of the ultrasonic wave with distance traveled. Ultrasonic velocity is the speed of this wave and is related to the wavelength and the frequency of oscillation of the deformation. It is determined by the density and elasticity of the sample, which is strongly influenced by the molecular arrangement. The elastic response is generally dominant. The minimum of ultrasonic velocity was observed for humic content of 1 g.dm-3 in 0,1M NaCl. Compressibility was practically the same up to this concentration and then they decreased. This confirms that the organization of humic particles in diluted and concentrated humic sols is different. The decrease in compressibility showed the forming of more rigid

Název v anglickém jazyce

Conformational Changes in Aqueous Solutions of Humic Acids

Popis výsledku anglicky

Conformational changes of humic acids in two different aqueous solutions (NaCl and NaOH) are studied by means of High Resolution Ultrasound Spectrometry. It is based on the measurement of parameters of ultrasonic waves propagating through the sample. Attenuation describes the decay of the amplitude of the ultrasonic wave with distance traveled. Ultrasonic velocity is the speed of this wave and is related to the wavelength and the frequency of oscillation of the deformation. It is determined by the density and elasticity of the sample, which is strongly influenced by the molecular arrangement. The elastic response is generally dominant. The minimum of ultrasonic velocity was observed for humic content of 1 g.dm-3 in 0,1M NaCl. Compressibility was practically the same up to this concentration and then they decreased. This confirms that the organization of humic particles in diluted and concentrated humic sols is different. The decrease in compressibility showed the forming of more rigid

Druh

O - Ostatní výsledky

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

2011

Kód důvěrnosti údajů

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