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Carina A. E. Costa, Filipa M. Casimiro, Carlos Vega-Aguilar and Alírio E. Rodrigues
Lignin is a raw material that can potentially be converted into valuable compounds through depolymerization reactions in addition to its use as a polymer or material. However, the chemical recalcitrance and the heterogeneous composition and structure of ...
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Candice van Wyk, Francien Susanna Botha, Robert Vleggaar, Jacobus N Eloff
Pág. 66 - 70
In a random screening of the anti-Candida activity of more than 500 tree species, the acetone leaf extract of Ptaeroxylon obliquum (Thunb.) Radlk. (Sneezewood) had very good antifungal activity against Candida albicans. We isolated the compound...
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David Villanueva-Bermejo, Erika Vázquez, Marisol Villalva, Susana Santoyo, Tiziana Fornari, Guillermo Reglero and Mónica Rodriguez García-Risco
Heather (Calluna vulgaris L.) and marigold (Calendula officinalis L.) are two rich sources of bioactive pentacyclic triterpenes. The supercritical carbon dioxide (SCCO2) extraction of these two plants was explored at a pressure range of 25?50 MPa, 50 °C,...
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Márton Korösi, Attila Sedon, Kinga Komka, Tamás Sohajda, Edit Székely
Pág. 130 - 137
Micronization processes involving supercritical carbon dioxide are rapid methods to produce fine particles. They also might offer the possibility of using less organic solvent than conventional crystallization methods leading to an environmentally friend...
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Amit Zodge, Márton Korösi, János Madarász, Imre Miklós Szilágyi, Erzsébet Varga, Edit Székely
Pág. 303 - 311
A new, rapid optical resolution method of 4-chloromandelic acid is presented using (R)-1-phenylethanamine as the resolving agent. Gas antisolvent fractionation was investigated as the separation method, studying the effect of pressure, temperature and ca...
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Máté Mihalovits, Attila Horváth, László Lorincz, Edit Székely, Sándor Kemény
Pág. 294 - 302
Solubility parameters are widely used in the polymer industry and are often applied in the high pressure field as well as they give the possibility of combining the effects of all operational parameters on solubility in a single term. We demonstrate a st...
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