Influence of starter and sweetener on the syneresis intensity of fermented milk drink

IF 1.3 Q2 AGRICULTURE, MULTIDISCIPLINARY

Acta Technologica Agriculturae Pub Date : 2023-03-01 DOI:10.51558/2232-7568.2022.15.2.15

T. Brčina, M. Vilušić, Melisa Zahirović

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引用次数: 0

Abstract

Syneresis represents the appearance of separation of whey on the surface of the product and is considered an important parameter of the quality of fermented dairy products. For the production of the fermented milk drink, kombucha was used as a non-traditional starter. Two sweeteners were used, honey and sucrose.The aim of the work was to examine the influence of starter and sweetener on changes in the subsequent acidity and intensity of syneresis of the samples during storage. The results were compared with a control sample obtained by inoculation with a conventional starter culture. During storage, there was a drop in pH value and an increase in titratableacidity, as a resultof the constant metabolic activity of the microflora and the production of lactic acid in the produced samples. Honey, as a sweetener, had an effect on the lower pH value of the fermented milk drink samples. The analysis of variance showed a statistically significant difference in the titratable acidity results and the intensity of syneresis of the samples during storage.Samples that were produced with kombucha as a starter showed better structure stability during storage and better quality. During storage, sample kb4 showed the best structural stability and the lowest intensity of syneresis. KEYWORDS:stinging nettle extract;bioactive components;extraction;antioxidant

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发酵剂和甜味剂对发酵乳饮料增效强度的影响

协同作用是乳清在产品表面分离的表现，被认为是发酵乳制品质量的重要参数。在发酵乳饮料的生产中，康普茶被用作非传统的发酵剂。使用了两种甜味剂，蜂蜜和蔗糖。这项工作的目的是研究发酵剂和甜味剂对样品在储存过程中随后的酸度变化和协同作用强度的影响。结果与常规发酵剂接种得到的对照样品进行了比较。在储存期间，由于微生物群的持续代谢活动和生产的样品中乳酸的产生，pH值下降，可滴定酸度增加。蜂蜜作为甜味剂，对发酵乳饮料样品的pH值降低有一定的影响。方差分析表明，样品在贮存期间的可滴定酸度结果和协同作用强度有统计学意义。以康普茶为发酵剂的样品在贮藏过程中表现出较好的结构稳定性和品质。在储存过程中，样品kb4表现出最好的结构稳定性和最低的协同作用强度。关键词:刺荨麻提取物;生物活性成分;提取

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来源期刊

Acta Technologica Agriculturae AGRICULTURE, MULTIDISCIPLINARY-

CiteScore

2.50

自引率

28.60%

发文量

审稿时长

18 weeks

期刊介绍： Acta Technologica Agriculturae is an international scientific double-blind peer reviewed journal focused on agricultural engineering. The journal is multidisciplinary and publishes original research and review papers in engineering, agricultural and biological sciences, and materials science. Aims and Scope Areas of interest include but are not limited to: agricultural and biosystems engineering; machines and mechanization of agricultural production; information and electrical technologies; agro-product and food processing engineering; physical, chemical and biological changes in the soil caused by tillage and field traffic, soil working machinery and terramechanics; renewable energy sources and bioenergy; rural buildings; related issues from applied physics and chemistry, ecology, economy and energy.