Costa Marion P, Frasao Beatriz S, Rodrigues Bruna L, Silva Adriana Co, Conte-Junior Carlos A
Faculdade de Veterinária, Department of Food Technology,Universidade Federal Fluminense,Niterói, RJ,Brazil.
J Dairy Res. 2016 Nov;83(4):493-496. doi: 10.1017/S0022029916000674.
The aim of this Research Communication was to investigate the changes in physicochemical, colour, apparent viscosity and texture properties in low-fat goat milk yogurts prepared with cupuassu pulp by the addition of inulin (SI), maltodextrin (SM), whey protein (SW) and skim milk powder (SP). Three batches of each cupuassu goat milk yogurt were prepared and analysed on the 1st day of storage by pH, proximate composition, colour, apparent viscosity, and texture. In comparison to yogurts from whole (W) or skimmed milk (S), all of the fat replacers improved the physicochemical properties (P < 0·05). The addition of the carbohydrates (inulin and maltodextrin) and proteins (whey protein and skim milk powder) also influenced the colour of the low-fat cupuassu goat milk yogurt (P < 0·05). All fat replacer treatments (SI, SM, SW and SP) presented a higher (P < 0·05) apparent viscosity than W and S yogurts. However, only the addition of skim milk powder increased the texture parameters (firmness and consistency) (P < 0·05). These results suggest that skim milk powder can be used to improve the texture properties of low-fat cupuassu goat milk. Furthermore, inulin, maltodextrin, and whey protein can potentially be applied in the goat dairy industry to increase the viscosity of yogurts.
本研究通讯的目的是调查添加菊粉(SI)、麦芽糊精(SM)、乳清蛋白(SW)和脱脂奶粉(SP)的用瓜拉纳果肉制备的低脂山羊奶酸奶的物理化学、颜色、表观粘度和质地特性的变化。制备了三批每种瓜拉纳山羊奶酸奶,并在储存第1天通过pH值、近似成分、颜色、表观粘度和质地进行分析。与全脂(W)或脱脂牛奶(S)制成的酸奶相比,所有脂肪替代品均改善了物理化学性质(P<0.05)。碳水化合物(菊粉和麦芽糊精)和蛋白质(乳清蛋白和脱脂奶粉)的添加也影响了低脂瓜拉纳山羊奶酸奶的颜色(P<0.05)。所有脂肪替代品处理(SI、SM、SW和SP)的表观粘度均高于W和S酸奶(P<0.05)。然而,只有添加脱脂奶粉增加了质地参数(硬度和稠度)(P<0.05)。这些结果表明,脱脂奶粉可用于改善低脂瓜拉纳山羊奶的质地特性。此外,菊粉、麦芽糊精和乳清蛋白可潜在地应用于山羊乳制品行业以增加酸奶的粘度。