Yogurt gels are a type of soft solid, and these networks are relatively dynamic systems that are prone to structural rearrangements. The physical properties of yogurt gels can be qualitatively explained using a model for casein interactions that emphasizes a balance between attractive (e.g., hydrophobic attractions, casein cross-links contributed by calcium phosphate nanoclusters and covalent d...

Desirability and good background of yogurt have led the manufacturers to use this product mostly for producing milk-based probiotic products. The aim of this study was to evalutate the effect of a mixture of prebiotics including oligofructose, lactulose, and inulin on physicochemical properties (pH value, acidity, and syneresis) of synbiotic yogurt containing lactobacillus casei. Pasteurized mi...

To date, there is significant controversy as to the survival of yogurt bacteria (namely, Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus) after passage through the human gastrointestinal tract. Survival of both bacterial species in human feces was investigated by culture on selective media. Out of 39 samples recovered from 13 healthy subjects over a 12-day period of f...

Genetically modified bacteria have a long history of use as gene delivery vectors primarily by intravenous administration, some progressing to clinical trials. Several molecules have been bioengineered into lactobacilli including cyanovirin, interleukin-10, betacarotene, cytosine deaminase and the extracellular domain of TRAIL (tumor necrosis factor related apoptosis inducing ligand). The disco...

Background: Yogurt is one of the most popular food diets with refreshing taste, nutritional, and health benefits. The objective of this study was to investigate the effect of three herbal Essential Oils (EOs) including peppermint, basil, and zataria on viability of the probiotic bacteria in yogurt samples and to evaluate the antimicrobial activities of the produced probiotic yogurts against Esc...

Background & Aim: Natural compounds can prolong the shelf life of food by inhibiting the growth of pathogenic and spoilage microorganisms. The purpose of this study was to investigate the effect of Sheng and Ziziphora alcoholic extracts (at concentrations of 500, 1000 and 1500 ppm) on physico chemical properties and microbial quality of yogurt. Experimental: </str...

Introduction: Aflatoxin M1 is an important mycotoxin frequently found in milk and dairy products. The main objective of this work was to study the stability of AFM1 during production and refrigerated storage of probiotic yogurt. Materials and methods: Two kinds of probiotic yogurt were made by cow&rsquo;s milk artificially contaminated with aflatoxin M1 at a level of 100 ng/l, and fermented...

background: the prangos ferulacea (pf)–yogurt is a traditional food in iran. this study investigated the effects of pf on the microbial, physicochemical and sensory properties of probiotic yoghurt. methods: pasteurized low fat milk was heated up to 85°c, cooled to 40°c, and then mixed with conventional and lactobacillus casei starter cultures incubated at 37°c until ph decreased to 4.6. then, t...

OBJECTIVES Genetic diversity and resistance of Lactobacillus bulgaricus sbsp. delbrueckii collection with 100 isolates from different home-made yogurt in rural Bulgarian areas were determined. METHODS The strain K98 was the most resistant to bile salts and low pH. Survival and effects on short chain fatty acids production were tested in 20 healthy volunteers. High genetic diversity was observ...