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Jeong Jiseon,Lee Yunjeong,Yoon Seokmin,Kim Jong-Hwa,Kim Wonyong 한국미생물학회 2021 The journal of microbiology Vol.59 No.12
As the functions of probiotics within the same species may not be shared, it is important to analyze the genetic characteristics of strains to determine their safety and usefulness before industrial applications. Hence the present study was undertaken to determine functional genes, and beneficial activities of strain LRCC5314, a bacterial strain isolated from kimchi through comparative genomic analysis. Phylogenetic analysis based on the 16S rRNA gene sequence showed that strain LRCC5314 was a member of the species L. plantarum. Whole genome size of strain LRCC5314 was sequence was 3.25 Mb long, with a G + C content of 44.5 mol% and 3,031 predicted genes. Strain LRCC5314 could metabolize hexoses through homofermentation, which produces only lactic acid from hexoses. According to gene annotation, strain LRCC- 5314 contained genes of EPS production and CRISPR. Moreover, the strain contained genes that could encode a complete biosynthetic pathway for the production of tryptophan, which can be used as a precursor of serotonin. Notably, the tryptophan and serotonin activities strain LRCC5314 were higher than those of reference strains, L. plantarum ATCC 14917T, DSM 20246, DSM 2601, and ATCC 8014, which reach tryptophan amount of 0.784 ± 0.045 μM/ml in MRS broth and serotonin concentration of 19.075 ± 0.295 ng/ml in HT-22 cells. These findings indicated that L. plantarum LRCC5314 could provide a source for serotonin production and could be used as a functional probiotic for stress regulation.
Jeong, Jiseon,Lee, Hyewon,Choi, Jaecheol,Ryou, Myung-Hyun,Lee, Yong Min Elsevier 2015 ELECTROCHIMICA ACTA Vol.154 No.-
<P><B>Abstract</B></P> <P>In order to investigate the effects of electrode density and thickness on the room temperature electrochemical performance of lithium metal polymer batteries (LMPBs), four LiFePO<SUB>4</SUB> cathodes with different electrode density/thickness (1.6gcm<SUP>−3</SUP>/20μm, 1.6gcm<SUP>−3</SUP>/40μm, 2.0gcm<SUP>−3</SUP>/20μm, and 2.0gcm<SUP>−3</SUP>/40μm) are prepared. Several types of unit cells employing each cathode are prepared using in situ thermally cross-linked polymer electrolytes controlled under the same manufacturing condition. The unit cells employing the thinnest cathode with highest density achieve the most improved rate capability and cycle life, which seems to be attributed to the higher electrical conductivity of the cathode and shorter diffusion length of Li<SUP>+</SUP> ions within the cathode pores. In addition, the LMPB with an optimized LiFePO<SUB>4</SUB> cathode (2.0gcm<SUP>−3</SUP>, 20μm) and polymer electrolyte (5vol% of the crosslinking agent with non-volatile liquid electrolytes) delivers a high and stable charge/discharge capacity under very fast charging and discharging conditions (at a 2C rate) at room temperature.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Electrode density and thickness affect redox property of lithium metal polymer cells. </LI> <LI> Higher density and lower thickness in LiFePO<SUB>4</SUB> cathodes lead to better performances. </LI> <LI> An optimized LiFePO<SUB>4</SUB> and polymer electrolyte delivers a good cycle life at a 2C rate. </LI> </UL> </P>
신지선(Jiseon Shin),정다해(Dahae Jeong),정우태(Wootae Jeong) 제어로봇시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.9
Tunnel Dust Cleaning Vehicle is recently being developed to remove the ultra fine dust particles exisiting in railway tunnel. The collection efficiency of this vehicle can be influenced by the design of the electric precipitator and the dust suction structure. Therefore, it is necessary to design an effective dust suction system for effective control of dust particle collection efficiency. In this paper, we have applied a dual cyclone filter as a prefilter in front of the electric precipitator, and verified the efficiency of the dust particle collection by controlling the design parameters through the Computational Fluid Dynamics (CFD) analysis of ANSYS FLUENT. As a result, it was confirmed that cyclone prefilter was able to collect most of fine particles less than PM100 after passing through the cyclone within 1.0 second. Therefore, when the particle flow is controlled using a dual cyclone filter, it is verified that various size of ultra fine particles can be selectively collected in the newly designed dust cleaning vehicle. The particle collecting system in the designed dual type cyclone prefilter can also reduce the maintenance cost of the electronic precipitator and improve the life of the fine dust collecting system module in the dust cleaning vehicle.
Immune Cells Are Differentially Affected by SARS-CoV-2 Viral Loads in K18-hACE2 Mice
Jung Ah Kim,Sung-Hee Kim,Jeong Jin Kim,Hyuna Noh,Su-bin Lee,Haengdueng Jeong,Jiseon Kim,Donghun Jeon,Jung Seon Seo,Dain On,Suhyeon Yoon,Sang Gyu Lee,Youn Woo Lee,Hui Jeong Jang,In Ho Park,Jooyeon Oh,S The Korean Association of Immunobiologists 2024 Immune Network Vol.24 No.2
Viral load and the duration of viral shedding of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are important determinants of the transmission of coronavirus disease 2019. In this study, we examined the effects of viral doses on the lung and spleen of K18-hACE2 transgenic mice by temporal histological and transcriptional analyses. Approximately, 1×10<sup>5</sup> plaque-forming units (PFU) of SARS-CoV-2 induced strong host responses in the lungs from 2 days post inoculation (dpi) which did not recover until the mice died, whereas responses to the virus were obvious at 5 days, recovering to the basal state by 14 dpi at 1×10<sup>2</sup> PFU. Further, flow cytometry showed that number of CD8+ T cells continuously increased in 1×10<sup>2</sup> PFU-virus-infected lungs from 2 dpi, but not in 1×10<sup>5</sup> PFU-virus-infected lungs. In spleens, responses to the virus were prominent from 2 dpi, and number of B cells was significantly decreased at 1×10<sup>5</sup> PFU; however, 1×1<sup>2</sup> PFU of virus induced very weak responses from 2 dpi which recovered by 10 dpi. Although the defense responses returned to normal and the mice survived, lung histology showed evidence of fibrosis, suggesting sequelae of SARS-CoV-2 infection. Our findings indicate that specific effectors of the immune response in the lung and spleen were either increased or depleted in response to doses of SARS-CoV-2. This study demonstrated that the response of local and systemic immune effectors to a viral infection varies with viral dose, which either exacerbates the severity of the infection or accelerates its elimination.
Temporal Transcriptome Analysis of SARS-CoV-2-Infected Lung and Spleen in Human ACE2-Transgenic Mice
Jung Ah Kim,Sung-Hee Kim,Jung Seon Seo,노현아,Haengdueng Jeong,Jiseon Kim,Donghun Jeon,Jeong Jin Kim,Dain On,윤서연,Sang Gyu Lee,이윤우,Hui Jeong Jang,박인호,Jooyeon Oh,Sang-Hyuk Seok,Yu Jin Lee,홍승민,안세희,Joon-Yong 한국분자세포생물학회 2022 Molecules and cells Vol.45 No.12
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a highly transmissible and potentially fatal virus. So far, most comprehensive analyses encompassing clinical and transcriptional manifestation have concentrated on the lungs. Here, we confirmed evident signs of viral infection in the lungs and spleen of SARS-CoV-2-infected K18-hACE2 mice, which replicate the phenotype and infection symptoms in hospitalized humans. Seven days post viral detection in organs, infected mice showed decreased vital signs, leading to death. Bronchopneumonia due to infiltration of leukocytes in the lungs and reduction in the spleen lymphocyte region were observed. Transcriptome profiling implicated the meticulous regulation of distress and recovery from cytokine-mediated immunity by distinct immune cell types in a time-dependent manner. In lungs, the chemokine-driven response to viral invasion was highly elevated at 2 days post infection (dpi). In late infection, diseased lungs, post the innate immune process, showed recovery signs. The spleen established an even more immediate line of defense than the lungs, and the cytokine expression profile dropped at 7 dpi. At 5 dpi, spleen samples diverged into two distinct groups with different transcriptome profile and pathophysiology. Inhibition of consecutive host cell viral entry and massive immunoglobulin production and proteolysis inhibition seemed that one group endeavored to survive, while the other group struggled with developmental regeneration against consistent viral intrusion through the replication cycle. Our results may contribute to improved understanding of the longitudinal response to viral infection and development of potential therapeutics for hospitalized patients affected by SARS-CoV-2.
Temporal Transcriptome Analysis of SARS-CoV-2-Infected Lung and Spleen in Human ACE2-Transgenic Mice
Jung Ah Kim,Sung-Hee Kim,Jung Seon Seo,노현아,Haengdueng Jeong,Jiseon Kim,Donghun Jeon,Jeong Jin Kim,Dain On,윤서연,Sang Gyu Lee,이윤우,Hui Jeong Jang,In Ho Park,Jooyeon Oh,Sang-Hyuk Seok,Yu Jin Lee,홍승민,안세희,Jo 한국분자세포생물학회 2022 Molecules and cells Vol.45 No.12
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a highly transmissible and potentially fatal virus. So far, most comprehensive analyses encompassing clinical and transcriptional manifestation have concentrated on the lungs. Here, we confirmed evident signs of viral infection in the lungs and spleen of SARS-CoV-2-infected K18-hACE2 mice, which replicate the phenotype and infection symptoms in hospitalized humans. Seven days post viral detection in organs, infected mice showed decreased vital signs, leading to death. Bronchopneumonia due to infiltration of leukocytes in the lungs and reduction in the spleen lymphocyte region were observed. Transcriptome profiling implicated the meticulous regulation of distress and recovery from cytokine-mediated immunity by distinct immune cell types in a time-dependent manner. In lungs, the chemokine-driven response to viral invasion was highly elevated at 2 days post infection (dpi). In late infection, diseased lungs, post the innate immune process, showed recovery signs. The spleen established an even more immediate line of defense than the lungs, and the cytokine expression profile dropped at 7 dpi. At 5 dpi, spleen samples diverged into two distinct groups with different transcriptome profile and pathophysiology. Inhibition of consecutive host cell viral entry and massive immunoglobulin production and proteolysis inhibition seemed that one group endeavored to survive, while the other group struggled with developmental regeneration against consistent viral intrusion through the replication cycle. Our results may contribute to improved understanding of the longitudinal response to viral infection and development of potential therapeutics for hospitalized patients affected by SARS-CoV-2.
Germ free mice are susceptible to gastric cancer induced by N-methyl-N-nitrosourea
Jiseon Kim,Chanyang Uhm,Buhyun Lee,Haengdueng Jeong,Kwan H Kim,Sung Hee Kim,Yura Lee,Sumin Hur,Donghun Jeon,Nakyum Lee,Yejin Cho,Yeseul Oh,Kyunghee Nam,Mina Lee,Ki Taek Nam 한국실험동물학회 2022 한국실험동물학회 학술발표대회 논문집 Vol.2022 No.1
Effect of Liposome Encapsulated Salt on Physicochemical and Sensory Evaluation of White Pan Bread
Jiseon Lee,SangYoon Lee,Soojin Kim,Jae-Hee Seo,Junggyu Lee,Dong-Hyun Park,Hee Jeong Choi,Jing Jing Bai,Eun-Young Ko,Mi-Jung Choi 한국산업식품공학회 2016 학술대회 및 심포지엄 Vol.2016 No.10
Excessive salt intake in body induces health risks resulting high blood pressure or heart diseases. Therefore, the low salt concentration and sale tasted food is needed by means of the modification of manufacturing process. The purpose of this study was to study the effect of inhomogeneous salt localization in bread to enhance the saltiness encapsulated salt. The 0, 0.5, 1, 1.5, and 2.0% of liposome encapsulated salt (LS) was added into the baking of white pan bread. The final salt concentration was adjusted at 2% by addition of salt. After baking the bread, the moisture content, loaf volume, fermentation rate, color, texture analysis, salt release rate and sensory test were measured. From this study, moisture content has no significant difference between control and treatments (p>0.05), except for 2.0% LS. Lightness of all treatments was higher than control (p<0.05), whereas, there were no significant difference in hardness (p>0.05). From the sensory test, the bread added 2.0% LS was showed the highest value from the salty taste. Moreover, it is related to the highest release rate of salt was represented at 2.0% LS. In conclusion, the salty intensity of bread can be enhanced by the salt localization using encapsulation of salt.