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Choi, Bo-Ram,Pham, Vinh Hoa,Park, Soo-Je,Kim, So-Jeong,Roh, Dong-Hyun,Rhee, Sung-Keun The Korean Society for Applied Biological Chemistr 2009 Applied Biological Chemistry (Appl Biol Chem) Vol.52 No.4
Marine sediment was collected from the Yellow Sea, Korea, and enriched using 1 mM thiosulfate under aerobic conditions. After 2 weeks, a facultative sulfur-oxidizing strain, BR13, was isolated. Phylogenetic analysis based on the 16S rRNA gene sequence showed that this strain belonged to the genus Marinobacter in the gamma-proteobacteria and was most closely related to Marinobacter pelagius $H225^T$ (99.5% 16S rRNA gene sequence similarity) and Marinobacter koreensis DD-$M3^T$(97.7% 16S rRNA gene sequence similarity). The isolate was a sulfur-oxidizer, Gram-negative, aerobic, and slightly halophilic bacterium and grew in 0.5-9% NaCl at 7-$37^{\circ}C$. Strain BR13 shared some physiological and biochemical properties with Marinobacter pelagius $H225^T$ and Marinobacter koreensis DD-$M3^T$. The G+C content of the genomic DNA of strain BR13 was 58.4 mol%. Strain BR13 possessed $C_{16:0}$, summed feature 4 ($C_{16:1}$ ${\omega}7c$ and/or $C_{15:1}$iso 2OH), $C_{16:0}N$ alcohol, and $C_{18:1}$ ${\omega}9c$ as the major cellular fatty acids. Our results showed that strain BR13 (=KCTC 22253 =JCM 15135) is a novel facultative sulfur-oxidizing strain in the genus of Marinobacter.
박수제,Byoung-Joon Park,Vinh Hoa Pham,Dae-No Yoon,김시관,이성근 한국미생물학회 2008 The journal of microbiology Vol.46 No.3
Molecular techniques, based on clone library of 18S rRNA gene, were employed to ascertain the diversity of microeukaryotic organisms in sediments from the East Sea. A total of 261 clones were recovered from surface sediments. Most of the clone sequences (90%) were affiliated with protists, dominated by Ciliates (18%) and Dinoflagellates (19%) of Alveolates, phototrophic Stramenopiles (11%), and Cercozoa (20%). Many of the clones were related to uncultivated eukaryotes clones retrieved from anoxic environments with several highly divergent 18S rRNA gene sequences. However, no clones were related to cultivated obligate anaerobic protists. Protistan communities between subsurface layers of 1 and 9 cm shared 23% of total phylotypes which comprised 64% of total clones retrieved. Analysis of diversity indices and rarefaction curve showed that the protistan community within the 1 cm layer exhibited higher diversity than the 9 cm layer. Our results imply that diverse protists remain to be uncovered within marine benthic environments.
( Bo Ram Choi ),( Vinh Hoa Pham ),( Soo Je Park ),( So Jeong Kim ),( Dong Hyun Roh ),( Sung Keun Rhee ) 한국응용생명화학회 2009 Applied Biological Chemistry (Appl Biol Chem) Vol.52 No.4
Marine sediment was collected from the Yellow Sea, Korea, and enriched using 1 mM thiosulfate under aerobic conditions. After 2 weeks, a facultative sulfur-oxidizing strain, BR13, was isolated. Phylogenetic analysis based on the l6S rRNA gene sequence showed that this strain belonged to the genus Marinobacter in the gamma-proteobacteria and was most closely related to Marinobacter pelagius H225(T) (99.5% 16S rRNA gene sequence similarity) and Marinobacter koreensis DD-M3(T) (97.7% 16S rRNA gene sequence similarity). The isolate was a sulfur-oxidizer, Gram-negative, aerobic, and slightly halophilic bacterium and grew in 0.5-9% NaC1 at 7-37℃. Strain BR13 shared some physiological and biochemical properties with Marinobacter pelagius H225(T) and Marinobacter koreensis DD-M3(T). The G+C content of the genomic DNA of strain BR13 was 58.4 mol%. Strain BR13 possessed C16:09, summed feature 4 (C16:1 ω7c and/or C15:1iso 2OH), C16:0N alcohol, and C18:1 ω9c as the major cellular fatty acids. Our results showed that strain BR13 (=KCTC 22253 =JCM 15135) is a novel facultative sulfur-oxidizing strain in the genus of Marinobacter.
( Dien Minh Vu ),( Binh Hoa Pham ),( Duc Pham Xuan ),( Dung Nguyen Dinh ),( Vinh Nguyen Duy ) 한국공업화학회 2023 공업화학 Vol.34 No.3
Fuel cells are one of the renewable energy sources that have sparked a lot of scientific attention for solving problems related to the energy crisis and environmental pollution. One of the most crucial subjects concerning the utilization of fuel cells is modeling. Therefore, an analytical steady-state and dynamic fuel cell model was described in this study. The parameter for the identification process was investigated, and the MATLAB/Simulink implementation was demonstrated. A 15-W proton exchange membrane fuel cell was used to apply the suggested modeling methodology. Comparing experimental and simulation findings indicated that the model error was constrained to 3%. This study showed that temperature and humidity affect fuel cell performance.
Deformation of a compound droplet in a wavy constricted channel
Hung V. Vu,Truong V. Vu,Binh D. Pham,Hoe D. Nguyen,Vinh T. Nguyen,Hoa T. Phan,Cuong T. Nguyen 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.1
Controlling and adjusting the size and shape of compound droplets is of increasing interest in manufacturing applications using microfluidic channels of complicated geometry. Using numerical simulation in the evolution of computer science with the ability to expand the scope of research and optimize costs is a current research trend. We here provide a numerical simulation analysis of the dynamics of a compound droplet travelling in a circular and sinusoidal-wave tube. The simulations were performed with variations of the Reynolds number, capillary number, droplet size, and channel geometry. It follows that the capillary number strongly impacts the dynamics of the droplet, and the alternation of breakup and finite deformation modes. The deformation increases and the droplet is stretched along the centerline of the channel as the Reynolds number increases. Increasing the length of the wavy region makes the droplet more deformed and enhance its breakup. Regime diagrams based on some of these parameters are also plotted.