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Microbial antagonism in an Arctic soil habitat was demonstrated by assessing the inhibitory interactions between bacterial isolates from the same location. Of 139 isolates obtained from five soil samples, 20 antagonists belonging to the genera, Arthrobacter, Pseudomonas and Flavobacterium were identified. Inter-genus, inter-species and inter-strain(More)
The diversity and abundance of culturable bacteria in Kongsfjorden water (15 stations) and sediments (12 stations) were studied. Viable numbers ranged between 105–106 CFU l−1 in water and 102–104 CFU g−1 in the sediments. A total of 291 and 43 bacterial isolates were retrieved from the water (KJF) and sediments (FS), respectively. Based on 16S rRNA gene(More)
A novel Gram-negative, rod-coccus shaped, non-motile, strain, RS-3(T), was isolated from a sediment sample collected from the marine transect of Kongsfjorden, Ny-Ålesund, Svalbard, Arctic. Colonies and broth cultures were yellowish in colour due to the presence of carotenoids. Strain RS-3(T) was positive for oxidase, aesculinase, caseinase, gelatinase and(More)
Culturable bacterial abundance at 11 different depths of a 50.26 m ice core from the Tallaksenvarden Nunatak, Antarctica, varied from 0.02 to 5.8 × 10(3) CFU ml(-1) of the melt water. A total of 138 bacterial strains were recovered from the 11 different depths of the ice core. Based on 16S rRNA gene sequence analyses, the 138 isolates could be categorized(More)
A novel gram-negative, rod-shaped, non-motile, psychrophilic bacterium, designated strain E4-9a(T), was isolated from a marine sediment sample collected at a depth of 276 m from Kongsfjorden, Svalbard, in the Arctic Ocean. The colony colour was golden yellow. Strain E4-9a(T) was positive for amylase activity at 5 °C. The predominant fatty acids were(More)
A novel Gram-stain-negative, horseshoe-shaped, non-motile bacterium, designated strain M12-11B(T), was isolated from a marine sediment sample collected at a depth of 200 m from Kongsfjorden, Svalbard. The colony colour was orangish red due to the presence of carotenoids. Fatty acids were dominated by branched and unsaturated fatty acids (90.8 %), with a(More)
The abundance and diversity of chemotactic heterotrophic bacteria associated with Arctic cyanobacteria was determined. The viable numbers ranged between 104 and 106 cell g−1 cyanobacterial biomass. A total of 112 morphotypes, representing 22 phylotypes based on their 16S rRNA sequence similarity were isolated from the samples. All the phylotypes were(More)
A novel Gram-staining-negative, coccoid, non-motile bacterium, designated strain V1-41(T), was isolated from a sample of marine sediment collected, at a depth of 200 m, from Kongsfjorden (an inlet on the west coast of Spitsbergen, an island that forms part of the Svalbard archipelago in the Arctic Ocean). The strain formed cream-brown colonies on marine(More)
1. Department of pharmaceutics, Vignan Pharmacy College, Vadlamudi, Andhra Pradesh * Corresponding author: Email: msreddympharm@gmail.com ABSTRACT Diabetes is the major disease in the world. Metformin is used to treat the type II diabetes. Sustained tablets of metformin were prepared by using of different proportion of polymers, xanthan gum, and guar gum by(More)
Two novel violet-pigmented, Gram-negative, rod-shaped, non-motile bacteria, designated strains M4-16(T) and M4-9, were isolated from sediment from an Arctic glacier. The predominant fatty acids of both strains were C16 : 1ω7c and/or C16 : 1ω6c (summed feature 3), C16 : 0, C14 : 0 and C18 : 1ω7c and/or C18 : 1ω6c (summed feature 8) and both strains contained(More)