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Quality characteristics and antioxidant activity of goat milk yogurt with fruits

机译:山羊牛奶酸奶与水果的质量特征及抗氧化活性

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Introduction. The aim of the research was to evaluate the physico-chemical, microbiological sensory characteristics and antioxidant potential of goat milk yogurt with fruits. Materials and methods. The yogurt was prepared from goat's milk with the addition of scald fruits (10%) of aronia (Chokeberry L., Nero variety), peaches (Prunus persica, variety Moldova), raspberries (Rubus idaeus, Cusma de Gugu?? variety), strawberries (Fragaria xanassa, Selva variety), apples (Malus domestica variety, Golden). Quality indices and antioxidant potential was determined according to standard methods. Results and discussions. The added fruits type had a strong impact on the values of titrable acidity and pH. The peache yogurt had a pH of 4.68±0.019. Higher acidity was obtained for raspberry yogurt, 103±0.076 oT. The amount of dry matter indicates 20.40±0.45% in strawberry yogurt. The dry matter content is inversely proportional to the value of the water activity, and maximum values were detected of 0.904±0.038 for apples, peaches, raspberries yogurt. The minimum viscosity values were obtained for aronia yogurt, 5450±4.85 Pa·s, and maximum for strawberry yogurt 8960±4.45 Pa·s. The results obtained for determining the total number of germs in the yogurt are satisfactory, the highest result was for peaches yogurt, 1.8 log cfu/ml. The maximum amount of lactic acid is in apple yoghurt 7.16±0.40 log10 cfu/ml. No yeasts and molds were detected. Aronia yogurt has the highest total content of polyphenols (187.15 mg GAE 100g-1 ), anthocyanins (56.45/100g) and antioxidant activity (3.9%), the maximum carotenoid content 0.452 mg/100 g was obtained for peaches yogurt and ascorbic acid 25.77 mg/100 g for strawberry yogurt. Yogurt samples sensory properties show that strawberry yogurt has the best characteristics, obtaining 19.25 points of 20. Conclusions. The addition of aronia fruits, strawberries and raspberries and peach positively influences the biological value and the quality indexes of goat milk yogurt with fruits.
机译:介绍。该研究的目的是评估山羊牛奶酸奶与水果的物理化学,微生物感官特征和抗氧化潜力。材料和方法。酸奶由山羊牛奶加入加入烫伤的牛奶(10%)ronia(Chokeberry L.,Nero Fligary),桃树(普鲁肯斯蒂卡,品种摩尔多瓦),覆盆子(Rubus Idaeus,Cusma de Guguers),草莓(Fragaria Xanassa,Selva品种),苹果(Malus Domestica品种,金色)。根据标准方法确定质量指数和抗氧化潜力。结果和讨论。添加的水果型对可滴定酸度和pH值的影响很大。桃果酸奶的pH为4.68±0.019。为覆盆子酸奶,103±0.076 OT获得较高的酸度。干物质的量表示草莓酸奶中的20.40±0.45%。干物质含量与水活性的值成反比,检测最大值0.904±0.038,用于苹果,桃子,覆盆子酸奶。为Aronia酸奶,5450±4.85Pa·s获得最小粘度值,以及草莓酸奶的最大值8960±4.45 pa·s。确定酸奶中细菌总数的结果令人满意,最高结果是桃子酸奶,1.8 log cfu / ml。最大量的乳酸是苹果酸奶7.16±0.40 log10 cfu / ml。没有检测到酵母和模具。 Aronia酸奶的总含量最高(187.15mg100g-1),花青素(56.45 / 100g)和抗氧化活性(3.9%),为桃酸奶和抗坏血酸得到0.452mg / 100g的最大类胡萝卜素含量为0.452mg / 100g .777 Mg / 100 g用于草莓酸奶。酸奶样品感官属性表明,草莓酸奶具有最佳特点,获得19.25点20分。结论。加入Aronia水果,草莓和覆盆子和桃子积极影响山羊奶酸奶与水果的生物价值和质量指标。

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