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19 results on '"Balcells, Mercé"'

18. Toxicity of allyl esters in insect cell lines and in spodoptera littoralis larvae

Author

Giner Gil, Marta, Avilla Hernández, Jesús, Balcells Fluvià, Mercè, Caccia, Silvia, Smagghe, Guy, Giner, Marta, Avilla, Jesú, Balcells, Mercé, Caccia, Silvia, and Smagghe, Guy

Subjects
Insect cells, Cell viability, Beetle, Animal, Physiology, Cytotoxicity, Moth, Trypan Blue, Spodoptera littoralis, Spodoptera, Insect cell, Biochemistry, Allyl ester, Cell Line, Entomotoxicity, Spodoptera littorali, Allyl esters, Drosophila melanogaster, Species Specificity, Larva, Insect Science, Ester, Thiazole, Tetrazolium Salt, Insecticide
Published
2012

19. Chemoenzymatic solvent-free synthesis of 1-monopalmitin using a microwave reactor.

Author

Torregrosa R, Balcells M, Torres M, and Canela-Garayoa R

Subjects
Chemistry Techniques, Synthetic instrumentation, Microwaves, Molecular Structure, Chemistry Techniques, Synthetic methods, Glycerides chemical synthesis
Abstract

An environmentally friendly method for the synthesis of 1-monopalmitin has been developed. The procedure consists of a two-step, solvent-free chemoenzymatic reaction. In the first step, palmitic acid is esterified with solketal (4-hydroxymethyl-2,2-dimethyl-1,3-dioxolane) using Novozym 435 by both conventional heating and microwave irradiation. The use of a microwave reactor allows the enzymatic synthesis of the intermediate compound with a similar yield as that achieved using conventional heating. In the second step, 1,2-acetonide-3-palmitoyl glycerol is cleaved to yield 1-monopalmitin by means of a cation-exchange resin and water or aliphatic alcohols as hydrolytic reagent in solvent-free conditions. The hydrolysis was accomplished in 15 min at 85 degrees C. The best yield was obtained using 1-pentanol. We conclude that the yield achieved depends on the batch and nature of the cation-exchange resin used as catalyst.

Published
2014

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