Uso de diferentes fibras de micro-extração em fase sólida para identificação de compostos voláteis em abacaxi cultivar smooth cayenne.

Materiais e métodos; Resultados.bitstream/CTAA-2009-09/8944/1/ct77-2005.pd

Evaluation of spent coffee obtained from the most common coffeemakers as a source of hydrophilic bioactive compounds

The main hydrophilic antioxidant compounds (3-, 4-, and 5-monocaffeoylquinic and 3,4-, 3,5-, and 4,5-dicaffeoylquinic acids, caffeine, and browned compounds, including melanoidins) and the antioxidant capacity (Folin-Ciocalteu, ABTS, DPPH, Fremy's salt, and TEMPO) were evaluated in Arabica and Robusta spent coffee obtained from the preparation of coffee brews with the most common coffeemakers (filter, espresso, plunger, and mocha). All spent coffee grounds, with the exception of those from the mocha coffeemaker, had relevant amounts of total caffeoylquinic acids (6.22-13.24 mg/g of spent coffee), mainly dicaffeoylquinic acids (3.31-5.79 mg/g of spent coffee), which were 4-7-fold higher than in their respective coffee brews. Caffeine ranged from 3.59 to 8.09 mg/g of spent coffee. The antioxidant capacities of the aqueous spent coffee extracts were 46.0-102.3% (filter), 59.2-85.6% (espresso), and <42% (plunger) in comparison to their respective coffee brews. This study obtained spent coffee extracts with antioxidant properties that can be used as a good source of hydrophilic bioactive compounds

Nutritional quality of lupine (Lupinus albus cv. Multolupa) as affected by lactic acid fermentation

The effects of selected NRRL strains of Lactobacillus acidophilus, L. buchneri, L. cellobiosus and L. fermentum upon oligosaccharide, phytate and alkaloid contents, as well as on the nutritive value of lupine, were investigated. Lupine was processed to a 12% total solids suspension, inoculated with 1% (v/v) cultures and fermented until a final desired pH of 4.5. L. acidophilus B-2092 and L. buchneri B-1837 growth was related to a significant sucrose breakdown and decreases of phytates, whereas L. acidophilus B-1910 and L. fermentum B-585 reduced the content of flatulence oligosaccharides. The activity of L. acidophilus B-1910 was particularly associated with lowering of alkaloids and increase of riboflavin. Lactic acid fermentation produced slight changes in lysine and methionine contents. No significant differences in net protein ratio values and protein digestibility were found between fermented and unfermented lupine (P &lt; 0.05). A 1 : 1 ratio mixture of B-1910 and B-2092 strains o

Influence of malting on selected components of soya bean, black bean, chickpea and barley

The influence of malting for 24 and 48 h on selected components was studied in soya bean, black bean, chick pea and barley. Proximate composition, calcium, iron zinc, α-galactosides including ciceritol, sucrose, phytic acid, myo-inositols phosphate and lectins were determined. The malting conditions were adequate to maintain the overall proximate composition and minerals. Galactosides decreased rapidly in all samples. Two days malting promoted a decrease of 91 and 84% in black bean and barley, respectively, while 44% was observed in the soya bean and only 34% in chickpea with a loss of 43% of ciceritol. The highest total levels of inositol phosphates were found in soya bean and black bean (478 and 450 mg%, respectively). IP6 and IP5 were not intensively affected by malting with the higher decrease of 25% observed in black bean. Lectin was detected in significant amounts only in soya bean and black bean and malting promoted 76% loss after 48 h in the black bean samples. The results indicated that short time malting may be useful to improve nutritional characteristics of the samples and that within the legume seeds studied black bean showed better results. Copyright (C) 1999 Published by Elsevier Science Ltd

Dietary fish oil replacement with lard and soybean oil affects triacylglycerol and phospholipid muscle and liver docosahexaenoic acid content but not in the brain and eyes of surubim juveniles Pseudoplatystoma sp

Triplicate groups of juvenile suribim were fed for 183 days one of four different isonitrogenous (47.6% crude protein) and isolipidic (18.7% lipid) diets formulated using three different lipid sources: 100% fish oil (FO, diet 1); 100% pig lard (L, diet 2); 100% soybean oil (SO, diet 3), and FO/L/SO (1:1:1, w/w/w; diet 4). The tissue levels of fatty acids 18:2n - 6 and 18:3n - 3 decreased relative to corresponding dietary fatty acid values. The 20:5n - 3 and 22:6n - 3 composition of muscle and liver neutral lipids were linearly correlated with corresponding dietary fatty acid composition. In contrast, the 22:6n - 3 composition of the brain and eye were similar among treatments. The 22:6n - 3 level was enriched in all tissues, particularly in the neural tissues. Similar results were observed for tissue polar lipids: fatty acids content reflected dietary composition, with the exception of the 22:6n - 3 level, which showed enrichment and no differences between groups. Given these results, the importance of the biochemical functions (transport and/or metabolism) of 22:6n - 3 in the development of the neural system of surubim warrants further investigation. © Springer Science+Business Media B.V. 2008