<?xml version="1.0"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/"><rdf:Description rdf:about="https://dk.um.si/IzpisGradiva.php?id=26244"><dc:title>Extraction of lutein from Marigold flower petals - Experimental kinetics and modelling</dc:title><dc:creator>Hojnik Niderl,	Maša	(Avtor)
	</dc:creator><dc:creator>Škerget,	Mojca	(Avtor)
	</dc:creator><dc:creator>Knez,	Željko	(Avtor)
	</dc:creator><dc:subject>lutein</dc:subject><dc:subject>marigold</dc:subject><dc:subject>conventional extraction</dc:subject><dc:subject>diffusivity</dc:subject><dc:subject>mass transfer</dc:subject><dc:description>The extraction kinetics behaviour of lutein from Marigold flower petals and simultaneous alkali hydrolysis has been studied. Extraction was carried out by varying following operating conditions: type of organic solvent, temperature, ratio liquid: material, concentration of alkali solution, and particle size of plant material. Experimental extraction curves were analysed with a mathematical model derived from Fick's second law. The extraction of lutein appeared to be governed by slow and fast diffusion processes. Results showed that the intra-particle diffusion was the rate-governing step of the extraction process, and that the chosen model gives very good approximation of experimental data.</dc:description><dc:date>2008</dc:date><dc:date>2012-05-31 12:16:52</dc:date><dc:type>Neznano</dc:type><dc:identifier>26244</dc:identifier><dc:language>sl</dc:language></rdf:Description></rdf:RDF>