Browsing by Autor "Carlos Solano"

Now showing 1 - 4 of 4

Arabinosylated phenolics obtained from SO<sub>2</sub>‐steam‐pretreated sugarcane bagasse
(Wiley, 2012) Cristhian Carrasco; Carlos Solano; J. Mauricio Peñarrieta; Henrique Macedo Baudel; Mats Galbe; Gunnar Lidén
Abstract A pentose‐rich hydrolysate fraction obtained by extraction of steam‐pretreated sugarcane bagasse was analysed with regard to dissolved phenolics. The liquid obtained after steam pretreatment (2% SO 2 (w/w) at 190 °C for 5 min) was divided into two parts: one containing dissolved compounds originating from hemicellulose (with xylose as the dominating compound), and the other containing predominantly dissolved compounds originating from lignin. Using nuclear magnetic resonance, the main dissolved compounds originating from lignin were identified as the glycosylated aromatics, 5‐ O ‐( trans ‐feruloyl)‐L‐Arabinofuranose and 5‐ O ‐( trans ‐coumaroyl)‐L‐Arabinofuranose, together with p ‐coumaric acid and small amounts of more common free phenolics such as p ‐hydroxybenzaldehyde, p ‐hydroxybenzoic acid and vanillin. The phenolic compounds were analysed and quantified using reversed‐phase high‐performance liquid chromatography. The findings show that SO 2 steam explosion opened up new degradation pathways during lignin degradation. Copyright © 2012 Society of Chemical Industry
Preparation of hydrophilic poly(3-hydroxybutyrate) macroporous scaffolds through enzyme-mediated modifications
(SAGE Publishing, 2011) Daniel Guzmán; Harald Kirsebom; Carlos Solano; Jorge Quillaguamán; Rajni Hatti‐Kaul
Scaffolds made from poly(3-hydroxybutyrate) were prepared by thermally induced phase separation from solutions in dioxane at temperatures above (23°C) or below the freezing point of the solvent. At 23°C, gelation occured with nano-fibrous network formation. The scaffolds prepared at —12°C and —25°C exhibited a highly porous morphology, with pores in the range of 3—25 μm, caused by freezing of dioxane. The macroporous scaffolds, prepared at —12°C, were treated with lipase to generate functional groups to which gelatin and glucosamine, respectively, were chemically coupled. The modified scaffolds had lower molecular weight, higher water content, lower melting temperature, and enthalpy. Cultivation of human embryonic fibroblasts on the macroporous scaffolds confirmed that the cells proliferated and adhered to the materials.
Steam pretreatment and fermentation of the straw material “Paja Brava” using simultaneous saccharification and co-fermentation
(Elsevier BV, 2010) Cristhian Carrasco; Henrique Macedo Baudel; J. Mauricio Peñarrieta; Carlos Solano; Leslie Tejeda; Christian Roslander; Mats Galbe; Gunnar Lidén
Synthesis of poinsettifolin A
(Elsevier BV, 2014) Zilma Escobar; Carlos Solano; Rikard Larsson; Martin Johansson; Efraín Salamanca; Alberto Giménez; Eduardo Muñóz; Olov Sterner