Conformational Changes in Aqueous Solutions of Humic Acids
The result's identifiers
Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Conformational Changes in Aqueous Solutions of Humic Acids
Original language description
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
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
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)
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů