Inhibition of Microcystis aeruginosa by the Extracellular Substances from an Aeromonas sp

( Yu Mei Liu ),( Ming Jun Chen ),( Meng Hui Wang1 ),( Rui Bao Jia ),( Li Li ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.9

Growth of Microcystis aeruginosa could be inhibited significantly within 24 h by the extracellular substances prepared from Aeromonas sp. strain FM. During the treatment, the concentration of extracellular soluble carbohydrates increased significantly in algal culture. Morphological and ultrastructural changes in M. aeruginosa cells, including breakage of the cell surface, secretion of mucilage, and intracellular disorganization of thylakoids, were observed. HPLC-MS analysis showed that the extracellular substances of Aeromonas sp. strain FM were a mixture of free amino acids, tripeptides, and clavulanate. Among these, the algaelysis effects of lysine and clavulanate were confirmed.

흡착 우라늄 이온의 전기 탈착거동

정종헌,원휘준,최왕규,김계남,이성호,오원진 한국공업화학회 2003 응용화학 Vol.7 No.1

Liquid wastes containing uranium ions in high concentration of chemical salts havebeen treated by electrosorption on a activated carbon fibers(ACFs) electrode. Effectiveuranium (VI) removal is accomplished when the potential is -0.5V(vs. Ag/AgCl) ormore negative. For a feed concentration of 100mg/1, the concentration of U(VI) in thecell effluent is reduced to less than 1mg/1, and electrosorption capacity over 500mg/uranium/gACF is reached. The adsorbed uranium can be desorbed up to 99%for 20h by passing a 1.9N NaCl solution at pH 3 through the cell and applying a potential of +1.2V. The amount of desorbed uranium increased as the solution pHwas lowered and the applied potential increased.

고양이의 만성 췌장염 치료 증례

김현아,윤기영,박정호,이왕희,송근호,박성준 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2011 動物醫科學硏究誌 Vol.18 No.1

A 5-year-old Russian blue cat was referred to the Veterinary Medical Teaching Hospital of Chungnam National University with the history of anorexia, lethargy, weight loss(6.5 to 4.8 kg) 2 weeks ago. Abdominal ultrasonography showed the following : increase of echogenicity of liver, irregular shape of gall bladder, hyperechoic region around duodenum. Pancreatitis, cholangitis, hepatic lipidosis was diagnosed by the ultrasonography. Anti- inflammatory therapy, antibiotic therapy was administered. Abdominal ultrasonography is a efficient available diagnostic tool but serum fPL test reveals the highest sensitivity and specifity result for feline pancreatitis. SNAP fPL test is newly released that can check pancreatitis within 10 minutes by same princple of Spec fPL test used in Gastrointestinal Laboratory of Texas A & M Univerrsity.

개 아토피성 피부염 장기치료 1례

박은정,윤기영,박정호,이왕희,박성준 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2011 動物醫科學硏究誌 Vol.18 No.1

A 7-year-old male castrated Shih-tzu dog was referred to the Veterinary Medical Teaching Hospital of Chungnam National University for severe pruritus. On physical examination were confirmed systemic erythema and alopecia, crust on the neck and flank region. Tape strip test identified numerous degenerative neutrophils and severe Malassezia infection. Treatment for severe pruritus was applied with systemic antihistamine therapy and topical therapy with antimicrobial shampoos. For the finding of appropriate treatment of atopic dermatitis, it was chosen six immune-related treatments. And clinical sign scores were evaluated by investigator with CADESI-03 after each application of six treatments. Application of human immunoglobulin G and leflunomide showed the remarkable regression of lesions.

개에서 발생한 이버멕틴 중독증 1례

여동원,윤기영,박정호,이왕희,송근호,박성준 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2011 動物醫科學硏究誌 Vol.18 No.1

A 1-year old, intact male Jin-do dog with ataxia, hypersalivation and anorexia was referred to the Veterinary Medical Teaching Hospital of Chungnam National University. Ivermectin toxicosis was diagnosed by the history taking, clinical signs, physical examination and neurological examination. After therapy with intravenous fluid and lipid emulsion administration, the clinical signs were found to have significantly improved.

Rich Se Nanoparticles Modified Mo-W18O49 as Enhanced Electrocatalyst for Hydrogen Evolution Reaction

Jun-hui Wang,Jia-Yao Tang,Jia-Yi Fan,Zeda Meng,Lei Zhu,오원춘 한국재료학회 2022 한국재료학회지 Vol.32 No.2

Herein a rich, Se-nanoparticle modified Mo-W18O49 nanocomposite as efficient hydrogen evolution reaction catalyst is reported via hydrothermal synthesized process. In this work, Na2SeSO3 solution and selenium powder are used as Se precursor material. The structure and composition of the nanocomposites are characterized by X-ray diffraction (XRD), high-resolution field emission scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), EDX spectrum analysis and the corresponding element mapping. The improved electrochemical properties are studied by current density, and EIS analysis. The as-prepared Se modified Mo-W18O49 synthesized via Na2SeSO3 is investigated by FE-SEM analysis and found to exhibit spherical particles combined with nanosheets. This special morphology effectively improves the charge separation and transfer efficiency, resulting in enhanced photoelectric behavior compared with that of pure Mo-W18O49. The nanomaterial obtained via Na2SeSO3 solution demonstrates a high HER activity and low overpotential of -0.34 V, allowing it to deliver a current density of 10 mA cm2.

Microwave Assisted Synthesis of SnS Decorated Graphene Nanocomposite with Efficient Visible-Light-Driven Photocatalytic Applications

Wang, Jun-Hui,Zeng, Yi-Kai,Gu, Hao,Zhu, Lei,Oh, Won-Chun Materials Research Society of Korea 2020 한국재료학회지 Vol.30 No.12

A facile microwave assisted solvothermal process is designed for fabricating SnS nanoparticles decorated on graphene nanosheet, which used as visible light driven photocatalyst. Some typical characterization techniques such as XRD, FT-IR, SEM with EDX analysis, and TEM and BET analysis are used to analyse the physical characteristics of as-prepared samples. Spherical SnS nanoparticles are uniformly dispersed on the surface of graphene nanosheet due to ammonia, which can prevent the aggregation of graphene oxide. Meanwhile, microwave radiation provides fast energy that promotes the formation of spherical SnS nanoparticles within a short time. The visible light photocatalytic activity of as-prepared SnS-GR nanocomposites is analysed through photodegradation efficiency of methylene blue with high concentration. According to the higher photocatalytic property, the as-prepared SnS-GR nanocomposites can be expected to be an efficient visible light driven photocatalyst. After five cycles for decolorization, the rate decreases from 87 % to 78 % (about 9 %). It is obvious that the photocatalytic activity of SnS-GR nanocomposite has good repeatability.

Mesoporous Carbon as a Metal-Free Catalyst for the Reduction of Nitroaromatics with Hydrazine Hydrate

Wang, Hui-Chun,Li, Bao-Lin,Zheng, Yan-Jun,Wang, Wen-Ying Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.9

Mesoporous carbons with tailored pore size were prepared by using sucrose as the carbon source and silicas as the templates. The silica templates were obtained from a hydroxypropyl-${\beta}$-cyclodextrin-silica hybrids using ammonium perchlorate oxidation at different temperatures to remove the organic matter. The structures and surface chemistry properties of these carbon materials were characterized by $N_2$ adsorption, TEM, SEM and FTIR measurements. The catalytic performances of these carbon materials were investigated through the reduction of nitroaromatic using hydrazine hydrate as the reducing agent. Compared with other carbon materials, such as active carbon, and carbon materials from the silica templates obtained by using calcination to remove the organic matter, these carbon materials exhibited much higher catalytic activity, no obvious deactivation was observed after recycling the catalyst four times. Higher surface area and pore volume, and the presence of abundant surface oxygen-containing functional groups, which originate from the special preparation process of carbon material, are likely responsible for the high catalytic property of these mesoporous carbon materials.

Mesoporous Carbon as a Metal-Free Catalyst for the Reduction of Nitroaromatics with Hydrazine Hydrate

Hui-Chun Wang,Bao-Lin Li,Yan-Jun Zheng,Wen-Ying Wang 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.9

Mesoporous carbons with tailored pore size were prepared by using sucrose as the carbon source and silicas as the templates. The silica templates were obtained from a hydroxypropyl-β-cyclodextrin-silica hybrids using ammonium perchlorate oxidation at different temperatures to remove the organic matter. The structures and surface chemistry properties of these carbon materials were characterized by N2 adsorption, TEM, SEM and FTIR measurements. The catalytic performances of these carbon materials were investigated through the reduction of nitroaromatic using hydrazine hydrate as the reducing agent. Compared with other carbon materials, such as active carbon, and carbon materials from the silica templates obtained by using calcination to remove the organic matter, these carbon materials exhibited much higher catalytic activity, no obvious deactivation was observed after recycling the catalyst four times. Higher surface area and pore volume, and the presence of abundant surface oxygen-containing functional groups, which originate from the special preparation process of carbon material, are likely responsible for the high catalytic property of these mesoporous carbon materials.

Molecular characterization of avian rotavirus isolated in Korea

Wang, Jun-Hui,Koo, Bon-Sang,Mo, In-Pil,Kang, Shien-Young The Korean Society of Veterinary Service 2013 韓國家畜衛生學會誌 Vol.36 No.1

An avian rotavirus (AvRV-2) was isolated from feces of broilers suffering from acute gastroenteritis in 2011. It was the first avian rotavirus isolated in Korea. To investigate the molecular characteristics of AvRV-2, the VP4, VP6, VP7 and NSP4 gene nucleotide sequences were determined and compared with those of rotavirus strains available in the GenBank database. The phylogenetic tree of VP7 gene showed that AvRV-2 had a high degree of nucleotide sequence homology (93.4% to 94.7%) with those of rotaviruses belonging to genotype G19 cluster. The phylogenetic tree of the VP4 gene revealed a high degree of nucleotide sequence homology (95.8% to 95.9%) with genotype P[30] rotaviruses isolated from chickens. The VP6 and NSP4 gene nucleotide sequences showed the highest identities with those of avian strains with 95.3% to 96.4% and 90.3% to 92.2%, respectively. Genetic characterization of the VP4, VP6, VP7 and NSP4 showed that AvRV-2 strain was most closely related to chicken rotavirus strains from Germany and Japan. Comparative nucleotide sequences and phylogenetic analysis indicated that avian rotavirus isolated from broilers belonged to genotype G19P[30] and it was the first report on avian rotavirus infection in Korea.