scholarly journals Effect of the addition of egg white on the microbiological, physicochemical and sensory quality of steamed yogurt during fermentation and cold storage

2021 ◽  
Vol 26 (51) ◽  
pp. 3-10
Author(s):  
Djilali Bouhadi ◽  
Ahmed Hariri ◽  
Zouaoui Benattouche ◽  
Ouissi El ◽  
Kada Ibri ◽  
...  
Keyword(s):  
Streptococcus Thermophilus ◽  
Egg White ◽  
International Standards ◽  
Lactobacillus Bulgaricus ◽  
Density Values ◽  
Fermented Dairy Products ◽  
Sensory Analyses ◽  
Fermented Dairy ◽  
Microbiological Properties

Yogurt or yoghurt is one of the most popular fermented dairy products worldwide and has gained widespread consumer acceptance as a healthy food. In this study, steamed yogurt, which contained lactic ferments (Lactobacillus bulgaricus and Streptococcus thermophilus), was produced with egg white addition at various levels (1%, 2%, 3%, 4% and 5%). The physicochemical, microbial and sensory analyses were determined to ascertain the quality attributes of the products. The dry matter, protein, viscosity and density values increased during storage. However, the microbiological properties of the five tested yogurt samples were within the international standards, and confirmed the safety and acceptability of the products. Steamed yogurts enriched with egg white were more preferred by panelists than the control yogurt in terms of sensory evaluation (flavor, color, taste and texture).The results indicated that the concentrations (2 and 3%) of egg white could be used to produce an egg white yogurt without significant adverse effects on the physicochemical, microbial, and sensory properties.

scholarly journals Improvement of the Texture of Yogurt by Use of Exopolysaccharide Producing Lactic Acid Bacteria

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Xue Han ◽  
Zhe Yang ◽  
Xueping Jing ◽  
Peng Yu ◽  
Yingchun Zhang ◽  
...  
Keyword(s):  
Dairy Products ◽  
Starter Culture ◽  
Streptococcus Thermophilus ◽  
Fermented Milk ◽  
Starter Cultures ◽  
Lactobacillus Delbrueckii ◽  
Exopolysaccharide Production ◽  
Fermented Dairy Products ◽  
Fermented Dairy

19Streptococcus thermophiluswith high exopolysaccharide production were isolated from traditional Chinese fermented dairy products. The exopolysaccharide and viscosity of milk fermented by these 19 isolates were assayed. The strains ofStreptococcus thermophiluszlw TM11 were selected because its fermented milk had the highest exopolysaccharide content (380 mg/L) and viscosity (7716 mpa/s). ThenStreptococcus thermophiluszlw TM11 was combined withLactobacillus delbrueckiisubsp.bulgaricus3 4.5 and the combination was named SH-1. The quality of the yogurt fermented by SH-1 and two commercial starter cultures (YO-MIX 465, YF-L711) were compared. It was shown that the exopolysaccharide content of yogurt fermented by SH-1 was similar to that of yogurt fermented by YF-L711 and significantly higher than YO-MIX 465 (p<0.05). In addition, the yogurt fermented by SH-1 had the lowest syneresis (8.5%) and better texture and sensory than the samples fermented by YO-MIX 465 and YF-L711. It manifested that the selected higher exopolysaccharide production starter SH-1 could be used as yogurt starter and reduce the amount of adding stabilizer, which can compare with the imported commercial starter culture.

scholarly journals Optimizing Dehydration Conditions of Cow's and Goat Milk Yogurt Powder

2020 ◽  
Vol 9 (3S) ◽  
pp. 68-71
Keyword(s):  
Goat Milk ◽  
National Standard ◽  
Drying Method ◽  
Drying Time ◽  
Excellent Method ◽  
Fermented Dairy Products ◽  
Fermented Dairy ◽  
Freeze Dryer ◽  
Microbiological Properties

Yogurt is one the importance the most common fermented dairy products widely consumed worldwide, mmostly studies are about in how to longer the yogurt shelf life, this study purposed to drying cow and goat milk yogurt by freeze dryer to provide alternative method don't have effect on yogurt compounds and lactic acid bacteria cell, and to identification the influence of stirring and time on yogurt powder compounds, the International Official Analytical Chemistry Association (AOAC) and the Indonesian National Standard (SNI) methods were used to analyze the chemical composition of yogurt powder, Cow’s and goat milks were mixed in rate 25:75 (v/v), inoculum with culture 15% (v/v) S. therophillus, L. acidophilus, L. burgaricus (1:1:1), and incubated at 46oC for 8h.Yogurt was dryed by freeze dryer at -73oC for 16, 19, and 22hours on 4, 5, and 3 batches with stirring respectively, The results obtained from this study that the best drying method of cow and goat yogurt treated by freeze dryer was19h., drying by freeze at batches with stirring have no significant effect on amount of bacteria cells, moreover, it is an excellent method to preserve the desirable microbiological properties in yogurt, and decreased the drying time and improving quality of final product.

scholarly journals Production of Low Fat Yoghurt Enriched With Different Functional Ingredients

2012 ◽  
Vol 5 (1-2) ◽  
Author(s):  
Milka Stijepić ◽  
Dragica Đurđević-Milošević ◽  
Jovana Glušac
Keyword(s):  
Whey Protein ◽  
Chemical Properties ◽  
Streptococcus Thermophilus ◽  
Lactobacillus Delbrueckii ◽  
Whey Protein Concentrate ◽  
Low Fat ◽  
Functional Ingredients ◽  
Manufacturing Procedure ◽  
Fermented Dairy

Due to a growing demand for functional fermented dairy foods with improved nutritional qualities, the food processing industry has prompted to cut down on ingredients such as fat, sugar and additives, thereby necessitating some important changes in sensory qualities that influence consumer acceptance of fermented dairy products. Addition of functional ingredients such as whey protein concentrate (WPC) and honey may improve overall quality of yoghurt. It is well known ability of WPC to support formation of whey protein aggregates which highly improve physical properties of yoghurt. Honey may be an ideal sweetener for yoghurt due to its sugar concentration, low pH and a variety of beneficial nutritional properties.The aim of the present study was to examine the effect of WPC (1%), as well as combination of WPC and honey (H: 2% and 4%) on the physical and chemical properties of low fat set-style yoghurt during 21 days of storage at 5°C. Yogurt was prepared from milk (1.5% fat), treated on 95ºC for 10 min and yoghurt culture VIVOLAC DriSet Yogurt 442: 10% Lactobacillus delbrueckii subsp. bulgaricus and 90% Streptococcus thermophilus (Vivolac Culture Corporation, Indiana, USA), applying standard manufacturing procedure. It was concluded that the addition of honey in combination with WPC improved quality of produced yoghurt. On the other side, as honey presents a higher nutrition value ingredient, the addition of different percent of honey in combination with WPC could present a novel formulation for functional fermented dairy food.

Antimicrobial effects of the phenolic compounds of Mentha piperita L on Streptococcus thermophilus and Lactobacillus bulgaricus and impacts on the quality of an alicament steamed yoghurt

2022 ◽  
Vol 11 (6) ◽  
pp. 646-666
Author(s):  
Ouiza Ait Chabane ◽  
Djamal Ait Saada ◽  
Sara Bensoula ◽  
Mouna Moulay ◽  
Ismahene Ghomri ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Streptococcus Thermophilus ◽  
Fermented Milk ◽  
Inhibitory Effect ◽  
Lactobacillus Bulgaricus ◽  
Mentha Piperita ◽  
Total Phenolic ◽  
Bacterial Strains ◽  
Hydroethanolic Extract

This study contributes to the evaluation of the antibacterial effect of hy-droethanolic extract of peppermint (Mentha piperita L.) rich in phenolic compounds on the growth of reference bacterial strains Streptococcus ther-mophilus (ATCC19258) and Lactobacillus bulgaricus (ATCC11842) as well as the consequences of its addition at a dose of 6% on the quality of a steamed yoghurt. The phenolic compounds of peppermint collected in Algeria were extracted from the ground leaves of the plant in a hydroethanolic solution. The antimicrobial activity of peppermint extract and the quality of yoghurt were assessed by the following measures: bacterial growth test, disc diffu-sion test, minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), pH, acidity, viscosity and the organoleptic tests (taste, odor, color and freshness). The results revealed that hydroethanolic extract of M. piperita L. had 25 mg GAE/ml of extract of total phenolic compound and a content of 8.28 mg QE/ml of extract of flavonoids. This extract had a bactericidal against S. thermophilus and a bacteriostatic inhibitory effect against L. bulgaricus. The addition of phenolic compounds of M. piperita L. at 154.02 mg GAE/100ml significantly reduced (p<0.05) acidity, viscosity, and the germ increase of S. thermophilus and L. bulgaricus in steamed yogurt prepared with 6% of hydroethanolic extract of the studied plant compared to the control. However, the fermented milk treated with the 6% of pepper-mint extract was very well appreciated by the tasting jury, just like the yo-ghurt control.

Probiotics Down-Regulate flaA σ28 Promoter in Campylobacter jejuni

2005 ◽  
Vol 68 (11) ◽  
pp. 2295-2300 ◽  
Author(s):  
WU DING ◽  
HAIFENG WANG ◽  
MANSEL W. GRIFFITHS
Keyword(s):  
Campylobacter Jejuni ◽  
Dairy Products ◽  
Promoter Activity ◽  
Streptococcus Thermophilus ◽  
Scientific Data ◽  
Bacterial Strains ◽  
Positive Effects ◽  
Probiotic Strains ◽  
Fermented Dairy Products ◽  
Fermented Dairy

Lactobacilli and bifidobacteria are important members of the gastrointestinal microflora of humans and animals and are thought to have positive effects on human health. Therefore, there is an increasing interest in using these microorganisms as probiotics to be incorporated into either fermented dairy products or tablets. However, convincing scientific data that support claims of their health benefits are scarce. The effect of cell-free extracts of milk fermented by 10 probiotic bacteria (five Bifidobacterium strains and five Lactobacillus strains) on the expression of the flaA gene of Campylobacter jejuni was assessed using a fusion between the flaA σ28 promoter and a promoterless luxCDABE cassette carried on the plasmid pRYluxCDABE, which resulted in strains with quantifiable luminescence linked to flaA σ28 promoter activity. Cell-free extracts of milk fermented by all of the tested probiotic strains inhibited the growth of the C. jejuni and down-regulated flaA σ28 promoter activity. Two nonprobiotic lactic acid bacterial strains, Lactococcus lactis and Streptococcus thermophilus, were less inhibitory.

scholarly journals Preparation and evaluation of novel functional fermented dairy products containing propolis and cinnamon

2021 ◽  
Author(s):  
Ayşe Gunes-Bayir ◽  
Mehmet Gültekin Bilgin ◽  
Duygu Guclu ◽  
Sultan Pogda ◽  
Agnes Dadak
Keyword(s):  
Lactobacillus Acidophilus ◽  
Viral Infections ◽  
Streptococcus Thermophilus ◽  
Starter Cultures ◽  
Lactobacillus Delbrueckii ◽  
Bifidobacterium Animalis ◽  
Inverse Effect ◽  
Fermented Dairy Products ◽  
Fermented Dairy ◽  
Recommended Level

AbstractNovel functional food products might be an easy accessible and eligible approach to help reduce the risk of severe viral infections including SARS-CoV-2. Hence a product containing probiotics, propolis and cinnamon was developed and interferences of the ingredients were characterized. Yogurts were prepared using starter cultures with propolis (0.03%) and cinnamon in various concentrations (0.3%, 1%, and 2.5%). Bifidobacterium animalis ssp. lactis, Lactobacillus acidophilus, Streptococcus thermophilus, and Lactobacillus delbrueckii subsp. bulgaricus were used as microorganisms for yogurt production. Chemical analysis revealed a decline of fat matter in the presence of propolis and/or cinnamon. Propolis had statistically significant suppressive effects on Bifidobacterium animalis ssp. lactis as well as on Lactobacillus delbrueckii subsp. bulgaricus numbers (p < 0.05). These effects were diminished in the presence of increasing cinnamon concentrations. For Lactobacillus acidophilus a statistically significant reducing effect on the number of colonies was observed in all products investigated. Nevertheless all samples met the standard of recommended level of ≥ 106 viable cells/g of a product. Propolis showed an inverse effect on Streptococcus thermophilus by increasing its colony numbers in yogurts. The probiotic yogurt samples containing propolis (0.03%) and cinnamon (2.5%) gained the highest number of points in the sensory evaluation compared to control.

scholarly journals The effect of non-conventional starter culture on lipid nutritional quality of fermented dairy products

2019 ◽  
pp. 324-331
Author(s):  
Dajana Vukic ◽  
Snezana Kravic ◽  
Spasenija Milanovic ◽  
Mirela Ilicic ◽  
Katarina Kanuric ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Dairy Products ◽  
Starter Culture ◽  
Fermented Milk ◽  
Fatty Acids Composition ◽  
Milk Products ◽  
Fermented Dairy Products ◽  
Fermented Dairy ◽  
Fermented Milk Products

In this study, the effects of kombucha inoculum as non-conventional starter culture on fatty acids composition of fermented milk, compared to a commercial probiotic (ABT-7) and yoghurt (YF-L812) starter cultures, during 21 days of storage was investigated. Fatty acids composition was determined by gas chromatography-mass spectrometry after the previous extraction of lipids and derivatization. The atherogenic (AI) and thrombogenic (TI) indices determined on the basis of fatty acids composition have been used for evaluation of the nutritive lipid quality of the fermented dairy products. The most significant levels of fatty acids in fermented milk products were palmitic, followed by oleic, stearic and myristic fatty acids. Fermented milk products were characterized by low atherogenic (2.14-2.39) and thrombogenic (2.91-3.18) indices, suggesting their consumption could have a favorable effect on human health. The AI and TI were comparable during the storage of fermented milk samples. Starter culture did not affect the health-related fatty acid composition of fermented milk products during storage.

scholarly journals Identifying the Diversity of Dominant LABs from Fermented Dairy Products Dahi and Yoghurt in Eastern Region of Nepal

2019 ◽  
Vol 11 ◽  
pp. 60-64
Author(s):  
Sanjay Mahato ◽  
Aakash Kumar Shahani
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Streptococcus Thermophilus ◽  
Lactobacillus Bulgaricus ◽  
Eastern Region ◽  
Isolation And Identification ◽  
Carbohydrate Utilization ◽  
Variable Nature ◽  
Microbiological Techniques ◽  
Fermented Dairy

The aim of this study was to isolate and identify lactic acid bacteria diversity from dahi/ yoghurt. Curd, also known as commercially prepared yoghurt or homemade Dahi, is formed during the slow lactic fermentation of lactose from milk by thermophilic lactic acid bacteria (LAB). Thirty-five samples of yoghurt and curd were collected from the Biratnagar and isolation and identification of bacteria were done by various microbiological techniques like MRS Agar inoculation, colony characteristics, microscopic and biochemical examination. A total of sixty-six strains of lactobacilli were isolated from curd and identification of strains was done by biochemical and carbohydrate utilization test. Lactobacillus bulgaricus, L. casei, L. fermentum, L. acidophilus, and Streptococcus thermophilus were identified from curd. pH of samples was between 3.0 to 4.0 for homemade dahi; while 4.34 to 4.5 for commercially available yoghurt. The mean colony count of lactic acid bacteria was 1.4x107–4.9x107 cfu/g. 37.9% of samples contained Streptococcus thermophilus, 30.3% had Lactobacillus bulgaricus. Forty-five isolates from 24 industrial yoghurt samples showed 37.5% of the yoghurt contained both Lactobacillus bulgaricus and Streptococcus thermophilus followed by 25% samples having S. thermophilus and L. acidophilus. Other species like L. fermentum and L. casei were less common. From 11 homemade dahi samples, 54.5% of curd possessed both S. thermophilus and L. bulgaricus; 18.2% curd had both S. thermophilus and L. fermentum. The study concludes that L. bulgaricus and Streptococcus thermophilus are prevalent potent lactic acid bacteria. This study provides an account of the diversity of lactic acid bacteria in dahi/ yoghurt which will provide useful information about the variable nature of curd in this region to future researchers.

scholarly journals Incorporation of vegetables in yoghurt as a source of dietary fibre: A review

2021 ◽  
Vol 8 (2) ◽  
pp. 008-013
Author(s):  
Faiza Iqbal ◽  
Muhammad Anees Ur Rehman ◽  
Mah Ahfaq
Keyword(s):  
Dietary Fibre ◽  
Dairy Product ◽  
Health Benefits ◽  
Milk Proteins ◽  
Streptococcus Thermophilus ◽  
Essential Amino Acids ◽  
Lactobacillus Bulgaricus ◽  
High Quality Protein ◽  
Acid Producing Bacteria ◽  
Fermented Dairy

Yoghurt is a fermented dairy product with conspicuous consumption around the world due to its pronounced health benefits. Yoghurt is defined as the food produced by culturing the milk in controlled conditions that contain lactic acid-producing bacteria (Lactobacillus bulgaricus, Streptococcus thermophilus. Consumer acceptability of Yoghurt is high due to its health benefits and sensory attributes. It provides 40% calcium and 30-45% phosphorus of daily requirement. All essential amino acids (proline and glycine) are present in Yoghurt. The biological value of milk proteins present in Yoghurt is high. It is considered a rich source of high-quality protein. Health benefits associated with Yoghurt are to improve the gastrointestinal digestion and immune system of humans. Yoghurt is enriched with proteins, carbohydrates, minerals (calcium and phosphorus), and vitamins (vitamin A, thiamine, riboflavin, niacin, folate and cobalamin). Yoghurt protein and its peptides have many physiological impacts as well as nutritional value. The only deficiency in Yoghurt is a lack of dietary fibre. The review emphasizes the addition of dietary fibre in Yoghurt to boost up its health benefits.

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