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Li X.-L.,Shanghai JiaoTong University | Li X.-L.,Third Institute of Oceanography SOA | Xu M.-J.,Shanghai JiaoTong University | Zhao Y.-L.,Shanghai JiaoTong University | Xu J.,Shanghai JiaoTong University
Molecules | Year: 2010

Mangrove Streptomyces represent a rich source of novel bioactive compounds in medicinal research. A novel alkaloid, named 1-N-methyl-3-methylamino-[N- butanoic acid-3'-(9'-methyl-8'-propen-7'-one)-amide]-benzo[f][1,7]naphthyridine- 2-one (1) was isolated from Streptomyces albogriseolus originating from mangrove sediments. The structure of compound 1 was elucidated by extensive spectroscopic data analyses and verified by the 13C-NMR calculation at the B3LYP/6-311+G(2d,p) level of theory. © 2010 by the authors; licensee MDPI, Basel, Switzerland.

Yan J.,Third Institute of Oceanography SOA | Chen L.,Third Institute of Oceanography SOA | Yang L.,Nanjing Southeast University
Chemical Engineering Journal | Year: 2016

A novel preconditioning process using the combined effect of acoustic agglomeration and vapor condensation for fine particles removal with high efficiency was presented. The effect of operation parameters on the enlargement and removal of fine particles were investigated experimentally. Particle size distribution and number concentration with and without external fields were measured by Electrical Low Pressure Impactor (ELPI). The results showed that the stage removal efficiency of fine particles was about 10-23% by acoustic agglomeration only with sound pressure level (SPL) of 150 dB. However, it was significantly improved by the combined effect of acoustic agglomeration and vapor condensation, reaching up to 53-80% with a SPL of 150 dB and supersaturation degree (S) of 1.2. Fine particle entrainment factor in acoustic field increased with the supersaturation degree, as well as the removal efficiency. While the supersaturation degree was lower than 1.0, the removal efficiency was extremely low, and increased slightly with the supersaturation degree. However, removal efficiency increased with the supersaturation degree rapidly when the supersaturation degree was higher than 1, which was improved by about 50% as the supersaturation degree increased from 1.0 to 1.4. The coupling external fields cannot be formed when the supersaturation degree was lower than the critical one, resulting in low removal efficiency. Removal efficiency was increased substantially to 63% in the supersaturation degree of 1.2, even in a low SPL of 130 dB. It indicates that high removal efficiency can be obtained in the combined effect of acoustic agglomeration and vapor condensational growth even in low intensity acoustic field. © 2016 Elsevier B.V.

Xiao J.,Third Institute of Oceanography SOA | Xiao J.,University of Tsukuba | Luo Y.,Third Institute of Oceanography SOA | Xie S.,Third Institute of Oceanography SOA | And 2 more authors.
International Journal of Systematic and Evolutionary Microbiology | Year: 2011

A Gram-reaction-positive bacterial strain of the genus Serinicoccus, designated MCCC 1A05965T, was isolated from a deep-sea (5368 m) sediment of the Indian Ocean. Comparison of 16S rRNA gene sequences revealed that the isolate shared 97.6% sequence similarity with Serinicoccus marinus JC1078T, the type strain of the only described species of the genus Serinicoccus. The DNA-DNA relatedness between these two strains was 46.2% (standard deviation 1.86%). The cell wall contained alanine, glycine, serine, L-ornithine and glutamic acid, which corresponds to the description of the genus Serinicoccus. The acyl type of the glycan chain of the peptidoglycan was glycolyl. Other characteristics of strain MCCC 1A05965T were consistent with those of the genus Serinicoccus. Cells were coccoid, moderately halophilic, oxidase-negative, catalase-positive and non-spore-forming. The major menaquinone was MK-8(H4). The predominant cellular fatty acids were iso-C15 : 0 (34.7%) and iso-C16 : 0 (17.0%). The polar lipids were phosphatidylglycerol, diphosphatidylglycerol, phosphatidylcholine, phosphatidylinositol and an unknown glycolipid. The DNA G+C content was 72 mol%. Strain MCCC 1A05965T (=0714S6-1T =DSM 21363T =CGMCC 4.5582T) is assigned as the type strain of a novel species, for which the name Serinicoccus profundi sp. nov. is proposed. © 2011 IUMS.

Niu F.,Xiamen University | Niu F.,Third Institute of Oceanography SOA | Xu X.,Xiamen University | Yang Y.,Third Institute of Oceanography SOA | And 3 more authors.
Shengxue Xuebao/Acta Acustica | Year: 2012

Two captive bottlenose dolphins housed in a oat cage in a Bay were subjected to a continuous 20 kHz tonal signal. The behavioral responses of dolphins were judged by comparing the surface distances relative to the sound source, number of surfacings, and number of the echolocation clicks production of the dolphins, during test periods and baseline periods. The avoidance threshold sound pressure level (SPL) for a continuous 20 kHz tonal signal for the bottlenose dolphins was estimated to be 154±2 dB (re 1 μPa, rms). In addation, the comparison between the avoidance threshold SPL for harbor porpoises to a 50 kHz continuous signal and bottlenose dolphins to a 20 kHz continuous signal was also studied. The results showed that the dolphins moved away from the sound source and came to the surface more frequently during the test periods than the baseline periods, but they produced clicks significantly fewer. Therefore, a continuous 20 kHz tonal signal seems to deter bottlenose dolphins from an area.

Zeng X.,Third Institute of Oceanography SOA | Zeng X.,Key Laboratory of Marine Genetic Resources of Fujian Province | Zhang Z.,Third Institute of Oceanography SOA | Zhang Z.,Key Laboratory of Marine Genetic Resources of Fujian Province | And 6 more authors.
International Journal of Systematic and Evolutionary Microbiology | Year: 2015

A thermophilic, anaerobic, iron-reducing bacterium (strain DY22619T) was isolated from a sulfide sample collected from an East Pacific Ocean hydrothermal field at a depth of 2901 m. Cells were Gram-stain-negative, motile rods (2-10 mm in length, 0.5 mm in width) with multiple peritrichous flagella. The strain grew at 40-70 ºC inclusive (optimum 60 ºC), at pH 4.5-8.5 inclusive (optimum pH 7.0) and with sea salts concentrations of 1-10% (w/v) (optimum 3% sea salts) and NaCl concentrations of 1.5-5.0% (w/v) (optimum 2.5% NaCl). Under optimal growth conditions, the generation time was around 55 min. The isolate was an obligate chemoorganoheterotroph, utilizing complex organic compounds, amino acids, carbohydrates and organic acids including peptone, tryptone, beef extract, yeast extract, alanine, glutamate, methionine, threonine, fructose, mannose, galactose, glucose, palatinose, rhamnose, turanose, gentiobiose, xylose, sorbose, pyruvate, tartaric acid, a-ketobutyric acid, a-ketovaleric acid, galacturonic acid and glucosaminic acid. Strain DY22619T was strictly anaerobic and facultatively dependent on various forms of Fe(III) as an electron acceptor: insoluble forms and soluble forms. It did not reduce sulfite, sulfate, thiosulfate or nitrate. The genomic DNA G+C content was 29.0 mol%. Phylogenetic 16S rRNA gene sequence analyses revealed that the closest relative of strain DY22619T was Caloranaerobacter azorensis MV1087T, sharing 97.41% 16S rRNA gene sequence similarity. On the basis of physiological distinctness and phylogenetic distance, the isolate is considered to represent a novel species of the genus Caloranaerobacter, for which the name Caloranaerobacter http://dx.doi.org/10.1601/nm.4081ferrireducens sp. nov. is proposed. The type strain is DY22619T (=JCM 19467T=DSM 27799T=MCCC1A06455T). © 2015, IUMS.

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