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 ◽  
...  

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.

Author(s):  
D. A. Shaimerdenova ◽  
J. M. Chakanova ◽  
D. M. Iskakova ◽  
G. T. Sarbasova ◽  
A. A. Esmambetov ◽  
...  

Grain-based foods play an essential role in human nutrition. Cereal-based products contain soluble and insoluble dietary fiber, which, by reducing cholesterol levels, reduce the risk of cardiovascular diseases, as well as stabilize digestive functions, preventing diseases of the gastrointestinal tract. Grain products supply the human body not only with energy, but also with protein – by 30-40%, b vitamins by 50-60%, and vitamin E by 80 %. In preliminary studies, 4 types of extruded grain bases were identified from buckwheat, millet, lentils and chickpeas, defined as the basis for fermented dairy products. 20 experiments were carried out in each of the variants using extruded grain bases from buckwheat, millet, lentils and chickpeas with two variants of the milk base – milk with a fat content of 2.5 and 3.2 %. mathematical models of the response function dependences on the selected factors were Obtained, which allowed determining the optimal ratio of ingredients for each of the considered variants. Developed formulation of two dairy products with grain-based extruded from millet based on milk with 2.5% fat and extruded grain-based chickpea based on dairy products with fat content of 3.2%. According to physical and chemical parameters, all samples of fermented milk products met the requirements regulatory documents.


Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3282
Author(s):  
Zofia Sokołowicz ◽  
Anna Augustyńska-Prejsnar ◽  
Józefa Krawczyk ◽  
Miroslava Kačániová ◽  
Maciej Kluz ◽  
...  

The aim of the study was to determine the effect of marinating with fermented milk products (buttermilk and sour milk) on the physical characteristics, microbiological quality, and sensory acceptability of Rhode Island Red (RIR) hen meat after the first year of laying use. The hen breast meat was marinated with fermented dairy products, buttermilk and sour milk, by the immersion method for 12 h at 4 °C. The assessed features included the quality of raw and roasted marinated and non-marinated meat in terms of physical characteristics (marinade absorption, water absorption, pH, L*, a*, b* colour, shear strength, texture profile analysis (TPA) test), microbiological parameters, and sensory characteristics. Bacteria were identified by the mass spectrometry method (MALDI-TOF MS Biotyper). Marinating meat with fermented dairy products lightened the colour, decreased the value of shear force, reduced hardness and chewiness, and limited the growth of aerobic bacteria and Pseudomonas spp. Additionally, after heat treatment, the number of identified aerobic bacteria families in the marinated in buttermilk and marinated in sour milk groups was smaller than in the non-marinated muscle group. The sensory evaluation showed a beneficial effect of marinating with buttermilk and sour milk on the tenderness, juiciness, and colour of roasted meat.


2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Xue Han ◽  
Zhe Yang ◽  
Xueping Jing ◽  
Peng Yu ◽  
Yingchun Zhang ◽  
...  

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.


Author(s):  
LA Rumyantseva ◽  
OV Vetrova ◽  
AV Istomin

Introduction. The article presents data on the role of milk and dairy products, including fermented milk products, in the human diet and reflects their important role in providing the body with proteins having a high essential amino acid content. In addition to all health benefits of milk, fermented dairy products have dietary and medicinal properties while their digestibility is higher than that of milk. Objective. To demonstrate the role of fermented milk products in human nutrition and benefits of fermented milk products enriched with probiotic microorganisms for preventive nutrition in the microbiocenosis of the gastrointestinal tract. Materials and methods. The article presents an analytical review of literary sources on the role of milk and dairy products, including fermented milk products, in human nutrition and provides information on the per capita production and consumption of milk and dairy products in the Russian Federation. It also addresses the problem of dysbiosis since fermented dairy technology can pose a serious microbiological risk related to favorable conditions for the growth of extraneous microorganisms coming from raw materials, starter cultures, and equipment during the production process. The absence of stringent quality standards for fermented milk products contributes to manufacturing of various counterfeit foods. Results. The article outlines the main provisions of the expert hygienic assessment of specialized food products for preventive nutrition for the purpose of their state registration on the example of fermented milk bioproducts, defines criteria for assessing the quality and safety of specialized products for dietary nutrition and requirements for technical documentation on these products, and provides the list of necessary documents for expert examination of hygiene and safety of specialized products for therapeutic and preventive nutrition. Conclusion. The permission to use novel fermented milk products as preventive nutrition foods shall be based on results of предassessing their compliance with the requirements of technical regulations of the Customs Union and the Eurasian Economic Union on the quality and safety of products and their raw materials, packaging and labeling.


2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Linda Valkovska ◽  
Artjoms Mališevs ◽  
Kaspars Kovaļenko ◽  
Aivars Bērziņš ◽  
Lelde Grantiņa-Ieviņa

Abstract Introduction Q fever in dairy cattle has been investigated in Latvia since 2012. In 2015, 10.7% of farms tested positive for the DNA of C. burnetii, its aetiological agent, in bulk tank milk. The presence of C. burnetii DNA and infectious bacteria in dairy products has been assessed in several countries, and because Latvian milk may contain them, parallel assessment in this country is recommended. Accordingly, the present study tested shop and farm retail dairy products from Latvia and included foreign products for comparison. Material and Methods Investigation was carried out of 187 samples of a diverse range of dairy products from 41 Latvian milk producers. Twenty-six comparable samples pooled from Estonia, France, Germany, Greece, Italy, Lithuania, the Netherlands, Poland and Spain were also included. The all-countries total number of fermented milk products was 160. Special attention was paid to products that could be more attractive to children because of their added chocolate, cacao, berry and fruit content. DNA was extracted and amplification of C. burnetii IS1111 was performed using a commercial PCR kit. Results Overall positivity was 60.56%. Domestic products were positive more often (60.96%) than foreign ones (57.69%). Only 26.67% of unpasteurised Latvian cow’s milk samples were positive whereas 76.47% of pasteurised equivalents and 63.13% of fermented milk products were. Sweetened and fruit-containing samples were 71.43% positive. Conclusion The shedding of C. burnetii via milk should be monitored and only milk from healthy animals allowed for sale for direct human consumption without pasteurisation. Raw milk quality and the effectiveness of industrial heat treatment and pasteurisation methods in Latvia and other countries should be carefully assessed to ensure adequate consumer health protection.


Foods ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 114
Author(s):  
Zinaida S. Zobkova ◽  
Ekaterina G. Lazareva ◽  
Vladislav K. Semipyatniy

The development of food products implies ensuring the optimal composition and ratio of the basic components, as well as their technological compatibility. A priori, the quality of raw materials, the optimal formula of the product and the efficiency of the technological process determine the quality of products, including biological value. The use of whole-cell sensors such as infusoria Tetrahymena pyriformis is most productive for screening biological studies. At present, for a comprehensive assessment there are no data on the use of simplest technology of fermented dairy products and the design of their biological value. The purpose of this research is to develop a methodology for creating whole-milk products of optimal biological value using the express method of biotesting. The research object was yogurt with the ratio of the mass fraction of fat and protein in the range of 0.36 ÷ 1.5, sucrose in the range of 5 ÷ 10%. An express method for determining the relative biological value of fermented dairy products using test organisms and an original methodology for creating whole-milk products of optimal biological value have been developed. A software has been developed to calculate formula of the product optimized for the following indicators: the relative biological value of the product, the cost of raw material and basic materials. The methodology is a tool to assist industry organizations in improving production technologies and quality management systems.


REPORTS ◽  
2020 ◽  
Vol 5 (333) ◽  
pp. 73-80
Author(s):  
U. Chomanov ◽  
◽  
T. Tultabayeva ◽  
A.Y. Shoman ◽  
A.K. Shoman ◽  
...  

Given the complexity of the baby food market, which is mainly made of cow's milk, as well as the chemical composition and biological properties of Mare's milk (saumal) are prerequisites for using the national food product with known curative properties in the diet of children of all ages. In this regard, the solution of the issues of widespread use of Mare's milk in the nutrition of children, as well as the production of baby food based on Mare's milk is under study and research in Russia, Europe and Kazakhstan. The problem of providing children with high-quality biologically complete food is of great social and economic importance, especially in connection with the deterioration of the environmental situation in many regions of the country, the widespread violation of the food structure. According to the analysis of literature sources, the study of the directed impact on the quality of combined products of children's and dietary nutrition through additives is an actual direction both in the CIS countries and in the far abroad. The quality of fermented milk products and their specific properties depend on the microbiological processes that occur during production. The composition of the microflora of a fermented milk product determines its taste qualities and plays a major role in their formation. The main advantage of fermented milk products is the presence of living microorganisms that contribute to the normalization of intestinal microflora, inhibit the development of putrid microorganisms, form the human immune system, and improve metabolism. In addition, lactic acid drinks, in comparison with ordinary milk, have almost complete digestibility. Therefore, the quality of fermented milk products and their value for human health depend on the presence of living microflora. When choosing sourdough, it is necessary to pay attention to the method of application, the specific composition of the microflora, since the taste and consistency of fermented milk products depends on the composition of sourdough. In this regard, the aim of the work was to conduct research on biotechnological processes in the production of combined dairy products from Mare's milk, enriched with plant additives for children's and dietary nutrition using a consortium of bacterial cultures. The scientific novelty of the work is the development of optimal biotechnological modes of production of dairy products for children and dietary nutrition based on Mare's milk with a biologically active additive from plant raw materials and a consortium of microorganisms. The study determined the influence of type and amount of herbal supplements on the physical and chemical indicators of milk-vegetable mixture to the combined production of fermented milk products for infant and dietetic foods. The selection of starter cultures for the production of products for children's and dietary nutrition based on Mare's milk was carried out, and the optimal dose of adding plant supplements to the milk mixture in the amount of 10% was established.


2015 ◽  
pp. 55-63
Author(s):  
Mirela Ilicic ◽  
Spasenija Milanovic ◽  
Dajana Hrnjez ◽  
Katarina Kanuric ◽  
Vladimir Vukic ◽  
...  

The objective of this study was to investigate the effect of fat content and type of the starter culture (traditional or probiotic) on physico-chemical quality, rheological and textural characteristics of the fermented dairy products during 14 days of storage. Seven different fermented dairy products of two different groups: stirred and set yoghurts were used in this study. The rheological and textural characteristics of the analyzed type of fermented dairy products after the production and during storage are dependent on the chemical composition, particularly fat content.


2013 ◽  
Vol 1 (1) ◽  
pp. 83-91 ◽  
Author(s):  
Subrota Hati ◽  
Surajit Mandal ◽  
J Prajapati

Starter cultures are those microorganisms (bacteria, yeasts, and molds or their combinations) that initiate and carry out the desired fermentation essential in manufacturing cheese and fermented dairy products such as Dahi, Lassi, Yogurt, Sour cream, Kefir, and Koumiss amongst others. Starter culture is defined as “an active microbial preparation, deliberately added to initiate desirable changes during preparation of fermented products”. Starter cultures have a multifunctional role in dairy fermentations. The production of lactic acid by fermenting lactose is the major role of dairy starters. The acid is responsible for development of characteristic body and texture of the fermented milk products, contributes to the overall flavour of the products, and enhances preservation. Beyond the horizons of their conventional role in acid, flavour and texture development, they are being looked up on as burgeoning “cell factories” for production of host of functional biomolecules and food ingredients such as biothickeners, bacteriocins, vitamins, bioactive peptides and amino acids.


Author(s):  
Agata Witczak ◽  
Anna Mituniewicz-Małek

Persistent organic pollutants, including polychlorinated biphenyls, may pose serious health hazard to consumers due to their lipophilic character as well as their high stability and toxicity. They are common in milk and also in dairy products. Therefore, to provide consumers with food of the lowest possible level of pollutants, it is important to estimate the influence of technological processes in milk and dairy products manufacture on changes in the contents of toxic PCB congeners. The PCB congeners content was determined using gas chromatography with mass spectrometry. Our study showed that yoghurt starter cultures turned out to be an effective tool in decreasing the toxicity equivalent of yoghurts. The presence of additional two starter cultures of bacteria Lactobacillus acidophilus and Bifidobacterium sp. In the A.B.T. bioyoghurt starter culture was most likely the reason of the highest efficiency of this culture to reduce the value of toxicity equivalent (TEQPCB) in bioyoghurts (reduction by nearly 50 %). However, none of the four tested starter cultures of yoghurts and bioyoghurts ensured complete biodegradation of any of the tested PCB congeners. These cultures contributed to a distinct reduction in contents of the PCB congeners in the finished products and, simultaneously, to a significant increase in PCB 28 and PCB 77, which may result from the degradation of more chlorinated congeners. In consequence it can improve the quality of fermented dairy products.


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