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The taxonomic characteristics of two bacterial strains, FH5T and SS4, isolated from enrichment cultures obtained from two distinct marine environments, were determined. These bacteria were Gram-stain-negative, facultatively anaerobic rods. Growth occurred at 20-40 °C (optimum, 28-32 °C), pH 5.5-9.0 (optimum, pH 7.0-7.5) and in the presence of 1-7% NaCl… (More)
A novel agarase-producing, non-endospore-forming marine bacterium, WH0801(T), was isolated from a fresh seaweed sample collected from the coast of Weihai, China. Preliminary characterization based on 16S rRNA gene sequence analysis showed that WH0801(T) shared 96.1 % similarity with Agarivorans albus MKT 106(T), the type species of the genus Agarivorans. A… (More)
A taxonomic study was performed on strain QM42(T), which was isolated from coastal seawater from an aquaculture site near Qingdao, China. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain QM42(T) was a member of the class Gammaproteobacteria. Cells of strain QM42(T) were Gram-negative, yellow, aerobic and rod-shaped. The strain… (More)
Strain HQM9, an aerobic, rod-shaped marine bacterium from red algae, can produce agarases and liquefy solid plating media efficiently when agar is used as a coagulant. Here we report the draft genome sequence and the initial findings from a preliminary analysis of strain HQM9, which should be a novel species of Flavobacteriaceae.
A Gram-stain-negative, facultatively anaerobic, gliding, yellow-pigmented bacterium, designated SS12(T), was isolated from shark gill homogenate and characterized using a polyphasic approach. The strain was catalase-positive and oxidase-negative. Optimal growth occurred at 28-30 °C, pH 7.0-7.5 and in the presence of 2-4% (w/v) NaCl. The DNA G+C content was… (More)
A novel Gram-stain-negative, facultatively anaerobic, catalase- and oxidase-positive, non-motile and pink-pigmented bacterium, designated G22(T), was isolated from Gahai, a saltwater lake in Qinghai province, China. Optimal growth occurred at 33-35 °C, pH 7.0-7.5, and in the presence of 2-4% (w/v) NaCl. The DNA G+C content was 40.0 mol%. The major polar… (More)
A novel Gram-stain-negative, facultatively anaerobic, rod-shaped, agar-digesting bacterial strain, designated HQM9T, was isolated from the surface of the marine red alga Gelidium amansii collected from the intertidal zone of Weihai, China. Cells of HQM9T were 3.0-4.0 μm long and 0.2-0.3 μm wide and lacked flagella. The new isolate grew optimally at 28-30… (More)
AgWH50A, a novel β-agarase, was cloned from Agarivorans gilvus WH0801 by degenerate and nested PCR. It consists of 942 amino acids (105 kDa), including a 21-amino acid signal peptide. AgWH50A shares the highest amino acid sequence homology with AgaD02 from Agarivorans sp. QM38 (53%). The recombinant agarase gene was expressed in Escherichia coli and… (More)
Agarivorans gilvus WH0801(T), an agarase-producing bacterium, was isolated from the surface of seaweed. Here, we present the complete genome sequence, which consists of one circular chromosome of 4,416,600 bp with a GC content of 45.9%. This genetic information will provide insight into biotechnological applications of producing agar for food and industry.
In this study, an efficient separation technology using Al2O3 nanoparticles (NPs) was developed for removing Bacillus subtilis from fermentation broth. The dosage of alumina nanoparticles used for separating B. subtilis increased during the culture process and remained stable in the stationary phase of the culture process. The pH of the culture-broth was… (More)