Physicochemical, microbiological, and sensory characteristics of probiotic Bulgarian yoghurts obtained by ultrafiltration of goat’s milk

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mariya Dushkova ◽  
Siyka Kodinova ◽  
Zapryana Denkova ◽  
Velichka Yanakieva ◽  
Nikolay Dimitrov Menkov
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Lactobacillus Acidophilus ◽  
Dry Matter ◽  
Titratable Acidity ◽  
Bifidobacterium Bifidum ◽  
Sensory Characteristics ◽  
Viable Cells ◽  
Goat’S Milk ◽  
Goat's Milk

Abstract The purpose of this study was to investigate the microbiological (number of viable lactic acid bacteria and bifidobacteria), physicochemical (dry matter, protein and fat contents, titratable acidity, and pH), and sensory characteristics (appearance of coagulum, taste and aroma, structure at cutting, color, and consistency at shattering) of probiotic Bulgarian yoghurts obtained by ultrafiltration of goat’s milk. These yoghurts were obtained using volume reduction ratios of 2 and 3 with the probiotic starters MZ2f, MZ2f + Bifidobacterium bifidum BB – 87, and MZ2f + Lactobacillus acidophilus LAB – 8. The increase in the level of the concentration by ultrafiltration led to an increase in the dry matter, protein and fat contents of the yoghurts, in the number of lactic acid bacteria and titratable acidity, and to a decrease in the pH. The twofold concentration by ultrafiltration resulted in a higher number of lactic acid bacteria in comparison with yoghurts made without ultrafiltration, and with better sensory characteristics compared to yoghurts without and with threefold ultrafiltration. The higher number of viable cells and better sensory characteristics were obtained for yoghurts with MZ2f + Bifidobacterium bifidum BB – 87 and MZ2f + Lactobacillus acidophilus LAB – 8 in comparison with MZ2f alone.

scholarly journals Quality characteristics of yogurt from goat's milk, supplemented with fruit juice

2011 ◽  
Vol 29 (No. 1) ◽  
pp. 24-30 ◽  
Author(s):  
S. Boycheva ◽  
T. Dimitrov ◽  
N. Naydenova ◽  
G. Mihaylova
Keyword(s):  
Fatty Acids ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Fruit Juice ◽  
Unsaturated Fatty Acids ◽  
Quality Characteristics ◽  
Blueberry Juice ◽  
Goat’S Milk ◽  
Goat's Milk ◽  
Control Samples

Yogurt was prepared from goat's milk, supplemented with aronia juice and blueberry juice. The dynamics of acidification, number of lactic acid bacteria, and fatty acids composition were investigated. Yogurt from goat's milk, supplemented with aronia juice and blueberry juice, coagulated at a lower acidity and faster than natural yogurt. The numbers of lactic acid bacteria in supplemented yogurts were higher compared to control samples. The addition of aronia and blueberry juices increased the amount of unsaturated fatty acids in yogurt by 6.9% and 8.5%, respectively. Polyunsaturated fatty acids increased by 11.2% in yogurt with aronia juice in comparison with natural yogurt.

scholarly journals Quality Analysis of Yoghurt from Goat's Milk Using Starter Lactic Acid Bacteria

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Azwar Azwar ◽  
Hisbullah Hisbullah ◽  
Ahmad Irgi ◽  
Wari Julyadi ◽  
Adisalamun Adisalamun ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Fermentation Process ◽  
Ph Value ◽  
Health Sector ◽  
Lactobacillus Bulgaricus ◽  
Quality Analysis ◽  
Fermentation Time ◽  
Goat’S Milk ◽  
Goat's Milk

Yoghurt is a pro-biotic beverage produced from the fermentation process of milk, namely from vegetable milk (soy milk) or animal milk (goat's milk and cow's milk). During the fermentation process, the chemical reactions that occur will turn milk into yogurt with the help of lactic acid bacteria. In the health sector, yogurt plays a role in increasing the body's immunity, digestive tract health and can prevent osteoporosis. In general, yogurt circulating in the community still has low nutritional content, so a more in-depth study needs to be done. The goal of this research is to examine the quality of yogurt by manipulating certain variables and adding other components to increase the yogurt's quality. Streptococcus thermophilus and Lactobacillus bulgaricus were used as starter as much as 12.5 mL each (10% of 500 mL of cream milk). The fixed variables in this study were the volume of goat's milk 500 ml, cream concentration 6%, pasteurization temperature 85°C, pasteurization time 15 minutes and fermentation temperature 45°C, while the independent variables were varying the length of the fermentation process for 3, 4, 5, 6, 7, 8 and 9 hours. From this study, it was concluded that yogurt with optimum results was obtained at a fermentation time of 6 hours, the pH value was 3.8, lactic acid content was 1.305%, protein content was 5.54%, fat content was 4.98%, and moisture content was 84.10%.

Use of Heat-Shocked Mesophilic Lactic Acid Bacteria in Low-Fat Goat's Milk Cheesemaking

1996 ◽  
Vol 44 (9) ◽  
pp. 2919-2923 ◽  
Author(s):  
C. Asensio ◽  
L. Parra ◽  
C. Peláez ◽  
R. Gómez
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Low Fat ◽  
Goat’S Milk ◽  
Goat's Milk

scholarly journals Stability of Lactic Acid Bacteria in Pasteurized Cow’s and Goat’s Milk

2019 ◽  
Vol 1 (4) ◽  
pp. 77-82
Author(s):  
Nurfarhana Syed Malik ◽  
Mohd. Nizam Lani ◽  
Fauziah Tufail Ahmad
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Viable Count ◽  
Plate Count ◽  
Pasteurized Milk ◽  
Milk Samples ◽  
Goat’S Milk ◽  
Different Types ◽  
Goat's Milk ◽  
The Stability

This study was done to determine the effect of pasteurization on the stability of lactic acid bacteria (LAB) and its enzyme in raw and pasteurized cow’s and goat’s milk. The total viable count for plate count of the bacterial growth concentration was higher in both pasteurized cow’s and goat’s milk at 2.48 log CFU/ml. This is followed by raw cow’s milk (1.59 log CFU/ml) and raw goat’s milk (0.65 log CFU/ml). Lactic acid bacteria (LAB) was found to be similar in both raw cow’s and goat’s milk (p>0.05), and pasteurized milk of both animals also contained the same amount of LAB (p>0.05). LAB was still detected in pasteurized milk (p<0.05), indicating the stability of LAB against the pasteurization temperature. Interestingly, based on API ZYM assay kit results, there were nine different enzymes detected in all samples, which were leucinearylamidase, valinearylamidase,cystinearylamidase, trypsin, α-chymotrypsin, naphthol-AS-BI-phosphohydrolase, α-glucosidase, β-glucosidaseand acid phosphatise. The results revealed that different types of lactic acid bacteria were detected in treated and non-treated milk samples produced by different animals, indicating the different stability levels of LAB against pasteurization.

scholarly journals Development of starters for dairy products based on goat's milk

2021 ◽  
Vol 84 (4) ◽  
pp. 113-117
Author(s):  
А.К. Оspanova ◽  
◽  
А.B. Оmarova ◽  
Von Atte ◽  
T.D. Ikombayev ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Dairy Products ◽  
Goat Milk ◽  
Starter Cultures ◽  
Yeast Cultures ◽  
Goat’S Milk ◽  
Goat's Milk ◽  
The Republic ◽  
Probiotic Effect

For milk and dairy products, 70 % of the Kazakh market accounts for the products of foreign companies. Geographically, the problem of the production of domestic products, the ecology of which is characteristic of the population of the country, has not yet been solved. The existing starter cultures are currently mainly intended for cow's milk, and are not adapted to the milk of other animal species. However, the production and processing of camel, mare and goat milk is a dairy farm with a history and traditions in the Republic of Kazakhstan. The fermentation process with the help of lactic acid bacteria is the basis for the preparation of products such as kefir, koumiss and shubat. There are data on the use of lactic acid bacteria in starters, but there is little data in studies on their use as starter cultures for camel, mare and goat milk, there are no scientific experimental results. Despite the economic rates of production of fermented products based on camel, mare and goat milk in the Republic of Kazakhstan, their production is slowed down at the industrial level due to the lack of yeast cultures and dairy technology for these types of milk. In this scientific work, fermenting consortia based on goat's milk was developed from active strains of microorganisms isolated from traditional fermented milk products, taking into account their compatibility, biochemical characteristics and scientific foundations. The technological, nutritional and microbiotic properties of the finished starters were adapted to the probiotic effect of camel, mare and goat milk by changing their composition. As a result of the study, a consortium of starters with a very high probiotic effect, safe for life, prone to survival in the digestive system was proposed.

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