About: Aggregation of Methylene Blue in Frozen Aqueous Solutions Studied by Absorption Spectroscopy

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The paper presents a qualitative as well as quantitative spectroscopic study of methylene blue (MB) aggregation that occurs upon freezing the aqueous solutions over a wide concentration range. The Gaussian curve analysis and the multivariate curve resolution-alternating least squares method were used to determine the number and concentration of chemical species responsible for the overlaying absorption visible spectra measured. The results show the extent of aggregation for the concentrations above 10(-7) mol L(-1), being dependent on the freezing rate and the initial concentration. While the local concentration of MB at the grain boundaries of polycrystalline ice increased by approximately 3 orders of magnitude upon fast freezing at 77 K compared to the liquid phase, the concentration raised at least by 6 orders of magnitude upon slow freezing at 243 K. The paper presents a qualitative as well as quantitative spectroscopic study of methylene blue (MB) aggregation that occurs upon freezing the aqueous solutions over a wide concentration range. The Gaussian curve analysis and the multivariate curve resolution-alternating least squares method were used to determine the number and concentration of chemical species responsible for the overlaying absorption visible spectra measured. The results show the extent of aggregation for the concentrations above 10(-7) mol L(-1), being dependent on the freezing rate and the initial concentration. While the local concentration of MB at the grain boundaries of polycrystalline ice increased by approximately 3 orders of magnitude upon fast freezing at 77 K compared to the liquid phase, the concentration raised at least by 6 orders of magnitude upon slow freezing at 243 K. (en)
Title	Aggregation of Methylene Blue in Frozen Aqueous Solutions Studied by Absorption Spectroscopy Aggregation of Methylene Blue in Frozen Aqueous Solutions Studied by Absorption Spectroscopy (en)
skos:prefLabel	Aggregation of Methylene Blue in Frozen Aqueous Solutions Studied by Absorption Spectroscopy Aggregation of Methylene Blue in Frozen Aqueous Solutions Studied by Absorption Spectroscopy (en)
skos:notation	RIV/00216224:14310/05:00012597!RIV10-MSM-14310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/05/0819), Z(AV0Z40400503), Z(MSM0021622412)
http://linked.open...iv/cisloPeriodika	30
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Klán, Petr Heger, Dominik
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	511538
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/05:00012597
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	photochemistry; aggregation; methylene blue (en)
http://linked.open.../riv/klicoveSlovo	photochemistry aggregation methylene blue
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[29E7D2D1774D]
http://linked.open...i/riv/nazevZdroje	Journal of Physical Chemistry A
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Environmental consequences of photochemical processes in ice and snow
http://linked.open...UplatneniVysledku	2005
http://linked.open...v/svazekPeriodika	109
http://linked.open...iv/tvurceVysledku	Jirkovský, Jaromír Klán, Petr Heger, Dominik
http://linked.open...ain/vavai/riv/wos	000230897000012
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)
issn	1089-5639
number of pages	8 (xsd:int)
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	Aggregation of Methylene Blue in Frozen Aqueous Solutions Studied by Absorption Spectroscopy

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