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The functional roles of short chain fatty acids as postbiotics in human gut: future perspectives
Mangala Lakshmi Ragavan,S. Hemalatha 한국식품과학회 2024 Food Science and Biotechnology Vol.33 No.2
The significance of gut microbiome and their metabolites (postbiotics) on human health could be a promising approach to treat various diseases that includes inflammatory bowel diseases, colon cancer, and many neurological disorders. Probiotics with potential mental health benefits (psychobiotics) can alter the gut-brain axis via immunological, humoral, neuronal, and metabolic pathways. Recently, probiotic bacteria like Lactobacillus and Bifidobacterium have been demonstrated for SCFAs production, which play a crucial role in a variety of diseases. These acids could enhance the production of mucins, antimicrobial proteins (bacteriocins and peptides), cytokines (Interleukin 10 and 18) and neurotransmitters (serotonin) in the intestine to main the gut microbiota, intestinal barrier system and other immune functions. In this review, we discuss about two mechanisms such as (i) SCFAs mediated intestinal barrier system, and (ii) SCFAs mediated gut-brain axis to elucidate the therapeutic options for the treatment/prevention of various diseases.
SUFFICIENT CONDITIONS FOR UNIVALENCE OF A GENERAL INTEGRAL OPERATOR
Selvaraj, Chellian,Karthikeyan, Kadhavoor Ragavan Korean Mathematical Society 2009 대한수학회보 Vol.46 No.2
In this paper, univalence of a certain integral operator and some interesting properties involving the integral operators on the classes of complex order are obtained. Relevant connections of the results, which are presented in this paper, with various other known results are also pointed out.
Sufficient conditions for univalence of a general integral operator
Chellian Selvaraj,Kadhavoor Ragavan Karthikeyan 대한수학회 2009 대한수학회보 Vol.46 No.2
In this paper, univalence of a certain integral operator and some interesting properties involving the integral operators on the classes of complex order are obtained. Relevant connections of the results, which are presented in this paper, with various other known results are also pointed out. In this paper, univalence of a certain integral operator and some interesting properties involving the integral operators on the classes of complex order are obtained. Relevant connections of the results, which are presented in this paper, with various other known results are also pointed out.
Suvarna, Surajvanshikumar,Dsouza, Janice,Ragavan, Mangala Lakshmi,Das, Nilanjana 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.3
The present study is focused on probiotic characterization of four yeasts viz. Pichia barkeri VIT-SJSN01, Yarrowia lipolytica VIT-ASN04, Wickerhamomyces anomalus VIT-ASN01 and Saccharomyces cerevisiae VIT-ASN03 isolated from food samples based on their auto-aggregation, co-aggregation ability and haemolytic activity. All the yeast strains showed good self-adhering and co-adhering potentiality with a value index of greater than 85%. None of the strains exhibited haemolysis which confirmed their non-pathogenic nature. Yeast strains were encapsulated in sodium alginate, sodium alginate coated with chitosan and sodium alginate-gelatinized with starch. Size and morphology of the beads and capsules were determined using SEM analysis. Encapsulation output and viability under storage condition was investigated. It was found that probiotic yeasts encapsulated in sodium alginate beads, chitosan coated beads and microcapsules showed better survival to simulated gastrointestinal conditions compared to free cells.
Surajvanshikumar Suvarna,Janice Dsouza,Mangala Lakshmi Ragavan,Nilanjana Das 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.3
The present study is focused on probiotic characterization of four yeasts viz. Pichia barkeri VIT-SJSN01, Yarrowia lipolytica VIT-ASN04, Wickerhamomyces anomalus VIT-ASN01 and Saccharomyces cerevisiae VITASN03 isolated from food samples based on their autoaggregation, co-aggregation ability and haemolytic activity. All the yeast strains showed good self-adhering and coadhering potentiality with a value index of greater than 85%. None of the strains exhibited haemolysis which confirmed their non-pathogenic nature. Yeast strains were encapsulated in sodium alginate, sodium alginate coated with chitosan and sodium alginate-gelatinized with starch. Size and morphology of the beads and capsules were determined using SEM analysis. Encapsulation output and viability under storage condition was investigated. It was found that probiotic yeasts encapsulated in sodium alginate beads, chitosan coated beads and microcapsules showed better survival to simulated gastrointestinal conditions compared to free cells.