NOPR Collection:

Extracellular biosynthesis of Selenium nanoparticles using some species of Lactobacillus

2015-05-01T00:00:00Z

Title: Extracellular biosynthesis of Selenium nanoparticles using some species of Lactobacillus Authors: Rajasree, Radhika S.R.; Gayathri., S Abstract: Selenium (Se), a non-metallic chemical element exhibits many properties like relatively high thermoconductivity, superconductivity, catalytic activities. In addition, Se is one of the key elements for maintaining the health of mammalian animals because of its anti-oxidative and pro-oxidative effects. In the present study, we describe the biosynthesis of highly stable selenium nanoparticles using three species of non-pathogenic, ecofriendly and easily available Lactic acid bacteria (LAB): Lactobacillus acidophilus, Lactobacillus plantarum and Lactobacillus rhamnosus was reported. Lactic acid bacteria can reduce selenium ions to elemental selenium nanoparticles (SeNPs) and deposit them in intracellular spaces. Reduction of Se⁺ ions in metal nanoparticles was investigated virtually by tracing the solution color which changed red after 48 hrs. Biosynthesized selenium nanoparticles were spherical (by TEM) in shape with size range of 20nm to 150 nm (UV spectrum). Moreover, as inferred from the FTIR spectrum, the presences of highly stable carbonyl group from the aminoacids have the strong ability to bind with the metal. Nanoparticles were further analysed for antimicrobial activity against pathogenic fungi, and they exhibited significant microbial activity. Page(s): 766-775

New distributional records of free-living marine nematodes from Indian waters I. Chromadorids

2015-05-01T00:00:00Z

Title: New distributional records of free-living marine nematodes from Indian waters I. Chromadorids Authors: Ansari, K.G.M.T.; Lyla, P.S.; Khan, S. Ajmal Abstract: Totally 192 species of free-living marine nematodes were identified in the southeast continental shelf of India during Cruise no. 260 of “FORV Sagar Samada”. Among these free-living marine nematodes following nine of these Chromadorids species: Comesa cuanensis, Chromaspirina inglisi, Chromaspirina parapontica, Desmadora (Desmadora) schulzi, Metachromadora (Bradylaimus) suecica, Pseudonchus northumbriensis, Epsilonema pustulatum, Draconema claparedii and Tricoma longirostris which happen to be first record from Indian waters are described. Page(s): 756-765

Antimicrobial activity of an epibiotic Exiguobacterium strain SGAA-2 from Gorgonian coral, Subergorgia suberosa (Pallas, 1766)

2015-05-01T00:00:00Z

Title: Antimicrobial activity of an epibiotic Exiguobacterium strain SGAA-2 from Gorgonian coral, Subergorgia suberosa (Pallas, 1766) Authors: Chellaram, C; Praveen, Mark M; John, A. Alex Abstract: Antagonistic activity was performed by agar overlay method and phylogenetic characterization of the potential strain was carried out by comparative sequencing of 16s rRNA technique. Ethanol precipitation of the strain has been analysis by Mass Spectrophotometry (MALDI-TOF). An epibiotic bacterial strain SGAA-2 was isolated from the gorgonian coral, Subergorgia suberosa. The Exiguobacterium strain SGAA-2 was found to exhibit highest zones of 6mm and 5mm were noted against two test strains Staphylococcus aureus and Klebsiella pneumoniae. Mass analysis has shown that the mass of the molecules ranged from 1225Da to 1451Da. Page(s): 750-755

Histochemistry of the Alimentary Canal of the Rudd (Scardinius erythrophtholmus (L., 1758)) in Lake Uluabat-Turkey

2015-05-01T00:00:00Z

Title: Histochemistry of the Alimentary Canal of the Rudd (Scardinius erythrophtholmus (L., 1758)) in Lake Uluabat-Turkey Authors: Şenol, Nurgül Abstract: This study involves the determination of mucous histochemistry at various regions of the alimentary canal of the Scardinius erythrophtholmus using light microscopy. Histochemical analysis showed that the gastrointestinal mucous content included sulphate-esters and/or carboxylic [Alcian blue (AB) pH 2.5 +], glycogene and/or oxidable dioles [periodic acid/Schiff+ (PAS+)], neutral or acid-rich (PAS/AB pH 2.5+) and strong acid sulphated [(AF+) (AF/AB pH 2.5+)] glycoproteins (GPs). But, in stomach and anterior intestine epithelium sulphated glycoproteins were not observed. As a result of the content of the glycoprotein was found to be more neutral property. Page(s): 744-749