Utjecaj obogaćivanja stočne hrane lanenim uljem i ekstrudatom sjemena lana na profil masnih kiselina u kozjem jogurtu

Feed composition is one of the most influential factors affecting fatty acid profile of milk products. The aim of this study was to investigate the influence of linseed oil and linseed extrudate supplementation on fatty acid composition of goat prebiotic and probiotic yogurt drinks. Thirty six White Shorthaired dairy goats at the beginning of their third lactation period were divided into two experimental and one control group, each comprising twelve animals. Goats in the experimental groups were given either 55 mL/day of linseed oil or 120 g/day of linseed extrudate over a three week period. The results suggest that feed supplementation with linseed oil and linseed extrudate caused considerable changes in fatty acid profile of goat yoghurt drinks. The most important nutritional change which was observed was increased n-3 fatty acid content (P<0.001) and decreased saturated fatty acid content (P<0.001). α-linolenic acid was significantly elevated (P<0.001) in both groups (in particular in goats which feed was supplemented with linseed oil).Sastav krme jedan je od najznačajnijih čimbenika koji utječu na profil masnih kiselina mliječnih proizvoda. Cilj ovog istraživanja bio je istražiti utjecaj dodatka ulja lanenog sjemena ili ekstrudata lanenog sjemena na sastav masnih kiselina prebiotičkog i probiotičkog jogurta od kozjeg mlijeka. Trideset i šest mliječnih koza pasmine White Shorthaired na početku trećeg razdoblja laktacije podijeljene su u dvije eksperimentalne i jednu kontrolnu skupinu, od kojih svaka uključuje dvanaest životinja. Kozama u eksperimentalnim skupinama davano je 55 mL/dan ulja lanenog sjemena ili 120 g/dan ekstrudata lanenog sjemena tijekom tri tjedna. Dodatak ulja lanenog sjemena i ekstrudata lanenog sjemena izazvao je znatne promjene u profilu masnih kiselina kozjeg jogurta. Najznačajnija promjena u hranjivim svojstvima bila je povećana količina masnih kiselina n-3 (P<0,001) i smanjen udjel zasićenih masnih kiselina (P<0,001). Udjel α-linolenske kiseline bio je značajno povišen (P<0,001) u obje skupine (posebno kod koza koje su hranjene dodatkom lanenog ulja)

Isolation and prebiotic activity of inulin-type fructan extracted from Pfaffia glomerata (Spreng) Pedersen roots

AbstractPfaffia glomerata (Amaranthaceae) is popularly known as “Brazilian ginseng.” Previous studies have shown that fructose is the major carbohydrate component present in its roots. Inulin-type fructans, polymers of fructose, are the most widespread and researched prebiotics. Here, we isolated and chemically characterized inulin extracted from P. glomerata roots and investigated its potential prebiotic effect. Fructans were isolated and their structures were determined using colorimetric, chromatography, polarimetry, and spectroscopic analysis. The degree of polymerization (DP) was determined, and an in vitro prebiotic test was performed. The structure of inulin was confirmed by chromatography and spectroscopic analysis and through comparison with existing data. Representatives from the genera Lactobacillus and Bifidobacterium utilized inulin from P. glomerata, because growth was significantly stimulated, while this ability is strain specific. The results indicated that inulin extracted from P. glomerata roots represents a promising new source of inulin-type prebiotics