Consumer acceptance of new strawberry vinegars by preference mapping

Consumers’ acceptance of new strawberry vinegars was evaluated, and trained panellists described their sensory profiles. Four strawberry vinegars, three produced from puree and one from cooked must, were evaluated jointly. Due to obtaining the highest percentage of consumer acceptance, cooked strawberry must vinegar was considered to be the best. This vinegar stood out in general impression, raisin, and liqueur attributes. Internal preference maps confirmed a higher acceptance level for the strawberry vinegars over commercial vinegar. External preference mapping, obtained by PLS2 analysis, revealed that the main sensory attributes driving consumers’ preferences are raisin, toasted caramel, spicy, and liqueur aroma.     

Effect of the inoculation level of Lactobacillus acidophilus in probiotic cheese on the physicochemical features and sensory performance compared with commercial cheeses

The complex metabolism of probiotic bacteria requires several technological options to guarantee the functionally of probiotic dairy foods during the shelf life. This research aimed to evaluate the effect of the supplementation of increasing amounts of Lactobacillus acidophilus (0, 0.4, or 0.8 g/L of milk) on the physicochemical parameters and sensory acceptance of Minas fresh cheese. In addition, the sensory acceptance of probiotic cheeses was assessed using a consumer test and compared with commercial cheeses (conventional and probiotic). High counts (9.11 to 9.42 log cfu/g) of L. acidophilus were observed throughout the shelf life, which contributed to the maintenance of its probiotic status and resulted in lower pH values and greater production of organic acids. The probiotic cheeses presented lower scores for appearance, aroma, and texture compared with conventional cheeses. Internal preference mapping explained almost 60% of the total variation of the data and showed a large number of consumers concentrated near the conventional cheeses, demonstrating greater preference for these samples. The findings indicated that some negative sensory effects could occur when high level of supplementation with L. acidophilus is used in probiotic cheese processing.     

树莓山楂酒的酿制

本试验以树莓为主要原料,以山楂为辅料,经榨汁去杂质后,利用高活性干酵母接种,密闭发酵,澄清处理后,酿造出风味独特的树莓山楂酒。成品酒度≥18％(v/v),总糖(g/100ml)≥2.5。总酸(g/100ml)0.4～0.6,符合国家果酒标准。     

Sensory Characterization and Consumer Preference Mapping of Fresh Sausages Manufactured with Goat and Sheep Meat

The main objective of this study was the sensory characterization, by a taste and a consumers’ panel, of fresh sausages from 140 culled goats and 140 culled ewes. Species and type of preparation effects were studied. All data were previously analyzed by analysis of variance. Taste panel data were analyzed by a Generalized Procrustes Analysis (GPA). Consumers’ panel data were analyzed by Preference Mapping. The 1st 2 factors explained 88.22% of total variation in GPA. Different sausages samples were perfectly differentiated by assessors. Goat sausages have been considered harder, more fibrous, and less juicy than sheep sausages. The panelists observed that sheep sausages without paprika had greater intensity of flavor, tasted spicy, and had an off‐odor, while goat sausages with paprika were considered sweeter. Consumers’ panel did not show any preference for the different types of sausages. This means that all types of sausages can have market opportunity.     

基于惩罚分析与偏好图技术的辣条消费接受性分析

随着国内休闲食品市场的不断扩大,了解影响消费者喜好的关键因素,并指导产品改进显得至关重要。以不同品牌辣条为研究对象,开展针对感官评价小组和消费者的关键感官属性评价。采用惩罚(Penalty)分析初探各产品需改进的感官属性及改进方向,通过方差分析、相关性分析关联研究各口味特征,利用偏好图技术深度处理与表征定量描述分析(QDA)和消费者喜好的映射结果,并验证惩罚分析结果的可靠性。结果表明,6个品牌的辣条样品感官属性与喜好均差异明显,惩罚分析提出影响消费者喜好的关键感官属性,初步确定辣条样品感官属性的改进策略。通过偏好图分析技术发现消费者对于样品DLB、DDR、ZCL和WLQ的偏好率为50%~80%,推测这些样品中的甜味、筋道、油汁感为潜在影响消费者喜好的感官属性。消费者对于样品GSW与HMH的偏好率为20%~30%,推测这2种辣条的咸味、辣味、麻味和香精香料味为潜在影响消费者喜好的感官属性。通过比较QDA、惩罚分析和偏好图,结果发现整体结论一致。综合三者结论确定最终的优化改进策略。本研究建立的辣条感官属性改进模型为辣条的口味特征改进及新产品的研发提供了参考依据。     

酶法提取树莓汁的研究

以澳洲红、早红、美国22三个品种树莓为原料,通过不同的酶处理方法来制取原果汁,优选适于制汁的品种和酶处理方法.     

二氧化碳浸渍对红树莓果酒品质的影响

以野生红树莓为原料,采用CO2浸渍发酵法酿造新型红树莓果酒。探究CO2浸渍工艺对红树莓果酒品质的影响。对CO2浸渍时间和浸渍温度2个因素进行了研究,同时与传统发酵法进行了对比。结果表明,CO2浸渍法最佳的浸渍时间为5 d,浸渍温度为26℃。浸渍法酿造的果酒酒精度为12.8%vol,酸度为9.86 g/L,明显低于传统发酵果酒酸度;果酒色泽为酒红色,酒香浓郁,口感柔和圆润。     

树莓果酒酿造工艺研究

以树莓为主要原料,葡萄酒活性干酵母为发酵菌种,采用液态深层发酵技术酿造树莓果酒。采用正交优化试验优选出树莓果酒最佳发酵工艺参数:果胶酶用量120mg/L,亚硫酸氢钠添加量为150 mg/L,调糖至170g/L,酵母接种量为7%,置于28℃的恒温培养箱中发酵6d左右,所得的树莓果酒酒精度为12.8%vol,色泽红色,澄清透亮,酒质醇和浓郁,果香酒香清新怡人。     

覆盆子的营养功效及产品开发

覆盆子营养丰富，具有抗衰老、减肥、治疗泌尿道感染、抗癌防癌、天然“阿斯匹林”、抗氧化、保护心脏、防止心血管疾病等功效；并且可以加工成果酱、果汁、果粉等产品，具有良好的发展空间。