Gayathri Devaraja

Gayathri Devaraja
Davangere University · Department of Microbiology

M Sc Ph D

About

67
Publications
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537
Citations
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January 2006 - present
Davangere University
Position
  • Professor

Publications

Publications (67)
Article
Full-text available
The fundamental goal of our investigation is to employ a sustainable synthesis method for zinc oxide nanoparticles (ZnO NPs), utilizing lactic acid bacteria isolated from curd as the key biological agent. Bacteria function as agents for both reduction and capping processes, which aids the synthesis of ZnO NPs. Various characterization techniques in...
Article
The goal of this research is to learn more about the field of nanotechnology, specifically with regard to the production, features, and antibacterial capabilities of zinc oxide nanoparticles (ZnO NPs) made from the medicinal plant Tinospora cordifolia. The benefits of chemical and green synthesized zinc sulfide nanoparticles (ZnS NPs) were compared...
Article
Full-text available
Lactic acid bacteria (LAB) are cosmopolitan in distribution with multiple ecological niches. LAB shows diverse applications in improvement of health by biochemical interference or imuno modulation to overcome several clinical circumstances. Lactose intolerance (LI) is one such situation, where individual show lactose maldigestion after the consumpt...
Chapter
Because of anthropogenic activities and urbanization, planet earth is becoming polluted in both developing and developed countries, thus becoming a global concern. The pollutants and contaminants released from industries, agricultural practices, and other source have become most hazardous to humans and are putting humans at high health risks. Nanot...
Article
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Introduction and Aim: The enzyme beta-galactosidase is extremely important in the food and pharmaceutical industries. The goal of this work was to improve the lactose hydrolysis process employing beta-galactosidase to convert glucose and galactose for alleviating lactose intolerance. Methods: Intracellular beta-galactosidase was extracted from Lact...
Article
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Probiotics have attained significant interest in recent years as a result of their gut microbiome modulation and gastrointestinal health benefits. Numerous fermented foods contain lactic acid bacteria (LAB) which are considered as GRAS and probiotic bacteria. The present study aimed to investigate indigenous LAB from homemade fermented milk samples...
Article
The aim of this study is to analyze the photocatalytic dye degradation efficiency of FeNiS2 with EDTA and Leishman stain thin films prepared using a sol-gel technique. The results of surface morphology and elemental composition, optical characterization of these films obtained using various characterization techniques such as SEM, EDX, UV-VIS spect...
Chapter
Full-text available
Lactic acid bacteria are a group of gram-positive microorganisms, which ferment carbohydrates to produce lactic acid and other metabolites, consumption of these group bacteria confers health benefit to the consumer and they are termed as Probiotics, current study aims, to isolate the Indigenous lactic acid bacteria from raw milk and homemade curd,...
Article
In past decades, the semiconducting chalcogenide nanocrystals has attracted much attention because of their uniqueness in terms of shape and size-dependent optical, physical, chemical and thermal properties resulting from quantum confinement effect. Among these semiconductors nanoparticles silver sulfide (Ag2S) is a narrow-band gap semiconductor an...
Chapter
The gut of human beings is inhabited by a diverse group of microorganisms, around trillions, which makes it a new essential endocrine organ and shows a symbiotic connection with a host, and they metabolize the food ingested and produce diverse bioactive and dietary compounds. This may include organic acids, bacteriocins, and short-chain fatty acids...
Chapter
Microbial colonization commences during birth, and establishment of stable gut microbiota takes place in the first 3–5 years of life. A diverse group of microbiome including virome, facultative anaerobic bacteria (Proteobacteria), microaerophilic bacteria (Lactobacillus) and anaerobic bacteria (Bifidobacterium and Bacteroides) colonize the intestin...
Article
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Introduction and Aim: Flacourtia indica (Burm.f.) Merr. is a member of the family Flacourtiaceae. This herb was used to treat a range of ailments and served as the foundation for ethnomedicine. Despite its enormous medical importance, the plant has received very little research with only a few antibacterial and pharmacological studies. The plant's...
Article
Lichens are complex symbiotic association of mycobionts, photobionts, and bacteriobionts, including chemolithotropic bacteria. In the present study, 46 lichenized bacteria were isolated by conventional and enrichment culture methods on nitrogen-free bromothymol blue (NFb) medium. Only 11 of the 46 isolates fixed nitrogen on NFb and had reduced acet...
Article
Full-text available
Lichens comprise highly diverse and complex microbial communities, the majority consisting of mycobiont, photobiont, Basidiomycetes yeast and bacteriobiont (internal bacterial communities). In this study, bacterial diversity of foliose lichen was reported. Next generation sequence (NGS) such as Illumina Sequencing (150*2) of 16S rRNA (V3 and V6 reg...
Article
Full-text available
In this study, calcium magnesium aluminate (Ca3MgAl10O17) nanomaterials (CMA NMs) have been synthesized via a simple and cost-effective chemical combustion method using urea as a fuel for the first time. The orthorhombic crystal structure of CMA NMs was confirmed during X-ray diffraction analysis. The lattice grain size of CMA was found in the rang...
Article
Full-text available
The reported research envisages for preparation of BaMgAl10O17 nanoparticles (BMA NPs) through solution combustion method using eco-friendly Aloe Vera gel extract. This obtained nanoparticle was well characterized by P-XRD, SEM-EDAX, FT-IR, TEM and UV-Visible spectroscopy. Powder X-ray diffraction analysis confirms the spinel phase formation of pre...
Article
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Contamination of soil and water bodies with heavy metals like arsenic (As) is of major concern, since arsenic is non-biodegradable, toxic and causes ill effects to gastrointestinal system, skin, liver, kidney or neurological functions. In addition, animals affected by arsenic pollution through fodder intern enter to food chain. Hence, there is an u...
Article
The potential Aflatoxin B1 (AFB1) binding Lactobacillus fermentum (LC5/a) was used for in vivo AFB1 binding and detoxification in presence of chlorophyll (CL) in male Swiss albino mice. Mice were randomly divided into seven groups. The control groups (CL, AFB1 and LC5/a) received chlorophyll (250 μg/kg b.w), AFB1 (100 μg/kg b.w) and LC5/a (1 × 108...
Article
Fungal spoilage and toxic biogenic amine production is a major risk in fermented products. Therefore, the selection of nontoxic biogenic amines producing probiotic bacteria plays a vital role in the fermentation process. In the present study, a total of 18 bacterial isolates were isolated from eight different homemade pickle samples and 15 lactic a...
Article
Full-text available
Background: Celiac disease is an intestinal chronic disorder with multifactorial etiology resulting in small intestinal mucosal injuries and malabsorption. In genetically predisposed individuals with HLA DQ2/DQ8 molecules, the gluten domains rich in glutamine and proline present gluten domains to gluten reactive CD4+ T cells causing injury to the...
Article
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Thirty-four isolates of Lactobacillus spp. (LAB) from 34 curd samples were evaluated for their aflatoxin B1 (AFB1) binding and probiotic properties. Upon characterization, four LAB isolates (LC3/a, LC4/c, LC/5a, and LM13/b) were found to be effective in removing AFB1 from culture media with a capacity of above 75%. Staining reaction, biochemical te...
Article
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Lichens are self-sustaining symbiotic organism with algae, fungi and bacteria, survives even in adverse environmental conditions. However, how these symbionts solitarily survive while subject to irradiation has not been studied yet. Here, we focused on the lichen associated bacteria possessing plant growth promoting (PGP) traits to withstand the lo...
Article
Full-text available
In the present paper the studies on iron zinc sulphide thin films that have been deposited at room temperature on to the glass slides by chemical bath deposition technique using a solution mixture of ferrous sulphate, zinc sulphate, sodium sulphide, EDTA and Leishman stain is reported. Both EDTA and Leishman stain act as complexing agents and are e...
Article
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The draft genome sequence of Bacillus subtilis GS 188, a novel spore-forming probiotic bacterium with gluten-hydrolyzing potential, was isolated from wheat sourdough and provides deep insights into the beneficial features of this strain for its use in the preparation of gluten-reduced wheat foods for humans with celiac disease.
Article
Aim: To isolate and characterize indigenous gluten hydrolyzing bacteria from wheat sourdough and curd samples and further evaluation of their probiotic potentiality. Methods and results: Indigenous gluten hydrolyzing isolates GS 33, GS 143, GS 181 and GS 188 were identified as Bacillus spp. by molecular-typing methods and studied extensively for...
Article
Probiotics are in the spotlight of enteric neuroscience research that influences brain biochemistry, neural development and other behavioral phenomenon. Depression due to mood disorder, pathogenic infections/metabolic disorders, psychiatric illness, stressful life style, alters the function of neurochemicals. Out of various strategies, recent resea...
Article
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Objective: The aim of the present study was to evaluate the digestive enzyme activity of the four Bacillus spp. and to optimize the physical parameters.Methods: The enzymes were produced by submerged fermentation supplementing enzyme specific substrates. The fermentation broths were centrifuged and the supernatants were used as source of crude enzy...
Article
Lichens are complex symbiotic association of mycobionts, photobionts, and bacteriobionts, including chemolithotropic bacteria. In the present study, 46 lichenized bacteria were isolated by conventional and enrichment culture methods on nitrogen-free bromothymol blue (NFb) medium. Only 11 of the 46 isolates fixed nitrogen on NFb and had reduced acet...
Article
Full-text available
Hippocrates once said: let food be thy medicine and medicine be thy food. Recent research in clinical nutrition agrees with Hippocrates opinion about food and health and as general saying Tell me your food I will tell you who you are. It is obvious that food directly influence physical as well as mental health and thereby influence the physiology a...
Article
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Wheat is one of the major cereal crops consumed worldwide, because of its nutrient richness and fitting its consistency to prepare varieties of attractive dishes and desserts. The wheat bran is rich with fibres, anti-oxidants, iron, zinc, copper, magnesium, B group Vitamins and phytonutrients. Wheat germ, the fertilized embryo contains B group vita...
Article
Bioegradation of 2,4'-dichlorobiphenyl (2,4 CB), by two isolates of Pseudomonas (GSa and GSb) was compared using GC-MS. Transformer oil polluted soil was used for the isolation of 2,4 CB degrading bacteria. GC-MS analysis of the solvent extracts obtained from Pseudomonas sp. GSa spent culture indicated the presence of Phenol 2,6-bis (1,1-dimethyl)-...
Article
Two bacterial isolates (Pseudomonas sp. GSa and Pseudomonas sp. GSb) were in close association able to assimilate 2,4 dichlorobiphenyl (2,4 CB), a PCB congener. GC–MS analysis of spent culture medium of the consortium with 2,4 CB as substrate showed 90 % degradation (according to Electron capture detection values) with catechol as one of the import...
Article
Two bacterial isolates (Pseudomonas sp. GSa and Pseudomonas sp. GSb) were in close association able to assimilate 2,4 dichlorobiphenyl (2,4 CB), a PCB congener. GC-MS analysis of spent culture medium of the consortium with 2,4 CB as substrate showed 90 % degradation (according to Electron capture detection values) with catechol as one of the import...
Article
Full-text available
Celiac disease (CD) is an intestinal chronic disorder with multifactorial etiology resulting in small intestinal mucosal injuries and malabsorption. Trigger from gluten and related cereal proteins, HLA-DQ2/DQ8 molecules and autoantibodies to tissue transglutaminase, are essential to precipitate the disease. Genetic, dietary and immunological factor...
Article
Full-text available
Lichens are symbiotically associated of algae and fungi, actively involved in conversion of atmospheric nitrogen into organic form. Lichens are also involved in phosphate solubilization and biological nitrogen fixation. Lichens possess cyanobacteria as its primary phycobiont commonly referred as cyanolichens, but in some lichens cyanobacteria are l...
Article
Lipase from Lactobacillus sp G5 isolate was partially purified and characterized. Out of 22 isolates, only seven (G1-G7) were phenotypically and biochemically characterized as Lactobacillus. However, only G5 isolate showed highest enzyme activity of 31.27 U/ml and chosen for partial purification and characterization. After ammonium sulphate precipi...
Article
The catabolic potential of transformer oil contaminated soil bacteria in aerobic degradation of polychlorinated biphenyls (PCB) were assessed. Transformer oil contaminated soil sample was subjected to microcosm enrichment experiments (PAS medium/biphenyl as sole carbon source). PCB-degrading activity of the enrichment cultures in PAS medium with th...
Article
Full-text available
In the present study, Lactobacillus (160) isolates were isolated from curd sample. The isolates were aimed to analyze the antibacterial potential against Escherichia coli, Vibrio cholerae sub sp., ogawa, V. cholerae sub sp., inaba, Klebsiella sp., Proteus sp. and Shigella dysenteriae. All the isolates were inhibiting the tested Enteropathogenic bac...
Article
Lactobacillus sp. is the most dominant probiotic strain of bacteria. Evidence indicates that the consumption of Lactobacillus sp. reduces the risk of colorectal cancer in animal models. The present study was carried out to determine whether administration of Lactobacillus fermentum/ Lactobacillus plantarum alone or in combination with vincristine h...
Article
Full-text available
Honey finds an application in ayurvedic medicine since Vedic period. Chemical composition of honey keeps changing with respect to sugars, enzymes, acids, etc. This variation depends upon the honey bees and the surrounding vegetation from which the honey bees collect nectar to prepare honey, which plays an important role in nutritive value, color, t...
Article
Probiotics are live microorganisms when administered in adequate amount confer health benefit to the host. Extensive usage of probiotics in dairy as a starter in preparation of cheese and other dairy products has become popular in the recent past. The representatives of probiotics mainly include Lactic Acid bacteria such as Lactobacillus acidophilu...

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