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核桃乳饮料是水包油型乳液，通常由油相和水相组成。油相为核桃油，水相包括水、核桃蛋白和一些乳化剂。近年来，世界各国核桃乳饮料市场不断壮大，但由于核桃仁含油量较高，而核桃蛋白在油水界面上的乳化性能较差，是一个热力学不稳定体系，因此在储存过程中，通常伴随着一系列的物理化学变化，包括乳脂化、絮凝、聚结和奥斯特瓦尔德熟化，使核桃乳饮料趋于不稳定。
pH梯度结合逆相蒸发法制备黑米麸皮花青素脂质体的研究
花青素 脂质体制备 包封率 响应面
2016/6/28
以大豆卵磷脂和胆固醇混合物为壁材,采用p H梯度结合逆相蒸发法制备黑米麸皮花青素脂质体,利用单因素实验,得到影响花青素脂质体包封率的三个显著性因素:大豆卵磷脂与胆固醇摩尔比(nSPC/nCH)、有机相与水相体积比(VOP/VAP)和磷酸缓冲液浓度(mmol/L)。根据中心组合(Box-Behnken)实验设计原理,采用响应面分析法对花青素脂质体的制备工艺进行了优化,结果得到花青素脂质体最佳制备工艺...
乳化剂类型、浓度及水相pH对水包核桃油乳状液物理稳定性的影响
乳化剂 核桃油 水包油乳状液 物理稳定性
2016/6/30
为了了解在水包核桃油乳状液中乳化剂类型、浓度及水相p H对其物理稳定性的影响,考察四种乳化剂即乳清分离蛋白(WPI)、十二烷基磺酸钠(SDS)、十二烷基三甲基溴化铵(DTAB)以及失水山梨醇聚氧乙烯酯(Tween20)在p H3.0和p H7.0条件下形成稳定的水包核桃油乳状液所需要的最低浓度。结果表明,p H对阳离子表面活性剂DTAB、非离子表面活性剂Tween20乳化效果影响较大,在p H3....
Glucose, l-Malic Acid and pH Effect on Fermentation Products in Biological Deacidification
wine yeast Saccharomyces cerevisiae Schizosaccharomyces pombe
2014/3/10
Industrial wine yeasts Saccharomyces cerevisiae Syrena, an interspecies hybrid (S. cerevisiae × S. bayanus) HW2-3 and Schizosaccharomyces pombe met 3–15 h+>/sup> were examined to determine changes in ...
Effect of Different Levels of Emulsion pH Adjusted with Lactic Acid and Glucono-Delta-Lactone on the Quality of Pork Sausages
Glucono-Delta-Lactone Pork Sausages
2008/11/26
The study was aimed at optimizing the pH hurdle during the process of development of shelf stable pork sausages using hurdle technology. The acidulants used were 0.5 N Lactic Acid (LA) and Glucono-Del...
Effect of pH and Water Activity in Generation of Selected Meaty Aroma Compounds in a Meat Model System
Selected Meaty Aroma Compounds Meat Model System
2008/11/26
Longissimus dorsi post rigor minced beef meat was washed repeatedly with 0.02 M phosphate buffer (pH 6.8) to obtain pigment-free muscle fibers. The resultant muscle fiber was freeze dried and used as...
Effect of pH and Water Activity in Generation of Selected Meaty Aroma Compounds in a Meat Model System
Effect of pH and Water Activity Selected Meaty
2016/5/31
Longissimus dorsi post rigor minced beef meat was washed repeatedly with 0.02 M phosphate buffer (pH 6.8) to obtain pigment-free muscle fibers. The resultant muscle fiber was freeze dried and used as ...
Site-Directed Mutagenesis of Tryptophan 622 of Thermoactinomyces vulgaris R-47 Glucoamylase:pH Optima and Activities of Five Mutants
glucoamylase optimal pH catalytic base
2008/4/20
In Aspergillus awamori glucoamylase, the optimal pH has been reported to increase to maintain activity by a mutation of Ser411 which forms a hydrogen-bond with a catalytic base (Fang and Ford, Protein...
The Two-Stage Coagulation of Milk Proteins in the Minimum of the Heat Coagulation Time-pH Profile of Milk: Effect of Casein Micelle Size
milk heat stability casein micelle size
2008/4/1
Milks with casein micelles larger or smaller than control milk were prepared by differential centrifugation. The heat stability of these modified milks increased markedly throughout the pH range 6.4 t...
Influence of pH on Protein Interactions and Microstructure of Process Cheese
process cheese microstructure scanning electron microscopy ionic interaction
2008/3/27
During the manufacture of process cheese, biochemical characteristics (casein solubilization, peptization coefficient, and water-holding capacity) were investigated using a combination of microscopic ...
Effects of Limited Proteolysis on the Microstructure of Heat-Induced Whey Protein Gels at Varying pH
whey protein proteolysis gel microstructure
2008/3/26
Whey protein solutions, reconstituted 12% commercial whey protein isolate, were hydrolyzed at pH 7.0 by one of three proteases: trypsin, Neutrase® (from Bacillus subtilis), and a Bacillus lichenif...
A Comparative Study of pH and Temperature Effects on the Acidic Coagulation of Milks from Cows, Goats, and Sheep
acidic coagulation cow milk goat milk sheep milk
2008/3/23
The acidic coagulation of milk from cows, goats, and sheep was studied at various temperatures by a turbidimetric method based on light reflection and capillary viscosimetry. Milk was acidified by hyd...
Mozzarella Cheese: Impact of Whey pH at Draining on Chemical Composition, Proteolysis, and Functional Properties
Mozzarella cheese draining pH composition functional properties
2008/3/22
Cultured low moisture, part skim Mozzarella cheeses were produced using the same milk (185 kg per vat), starter, and coagulant, but with two different whey pH at draining (6.40 and 6.15). Cheese was m...
Effects of pH and Sodium Chloride on the Interactions Between Geotrichum candidum and Brevibacterium linens
Geotrichum candidum Brevibacterium linens interaction pH
2008/3/22
The interactions between 14 isolates of Geotrichum candidum and 14 isolates of Brevibacterium linens were analyzed to understand their behavior in cheese making. Mixed cultures were grown in a peptone...
Mozzarella Cheese: Impact of Milling pH on Functional Properties
Mozzarella cheese milling Ph functional properties apparent viscosity
2008/3/19
The objective of this study was to determine the impact of milling pH and refrigerated storage time on functional properties of unmelted and melted Mozzarella cheese. A "no-brine" Mozzarella cheese-ma...