916 results on '"Chang-Jin, Kim"'
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2. NR-Router: Non-Regular Electrode Routing with Optimal Pin Selection for Electrowetting-on-Dielectric Chips.
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Hsin-Chuan Huang, Chi-Chun Liang, Qining Wang, Xing Huang 0001, Tsung-Yi Ho, and Chang-Jin Kim 0001
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- 2022
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3. New discovery on the nematode activity of aureothin and alloaureothin isolated from endophytic bacteria Streptomyces sp. AE170020
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Min-Kyoung Kang, Jong-Hoon Kim, Min-Jiao Liu, Chun-Zhi Jin, Dong-Jin Park, Junheon Kim, Bong-Hyun Sung, Chang-Jin Kim, and Kwang-Hee Son
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Medicine ,Science - Abstract
Abstract Endophytic bacteria, a rich source of bioactive secondary metabolites, are ideal candidates for environmentally benign agents. In this study, an endophytic strain, Streptomyces sp. AE170020, was isolated and selected for the purification of nematicidal substances based on its high nematicidal activity. Two highly active components, aureothin and alloaureothin, were identified, and their chemical structures were determined using spectroscopic analysis. Both compounds suppressed the growth, reproduction, and behavior of Bursaphelenchus xylophilus. In in vivo experiments, the extracts of strain Streptomyces sp. AE170020 effectively suppressed the development of pine wilt disease in 4-year-old plants of Pinus densiflora. The potency of secondary metabolites isolated from endophytic strains suggests applications in controlling Bursaphelenchus xylophilus and opens an avenue for further research on exploring bioactive substances against the pine wood nematode.
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- 2022
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4. Open-Source Incubation Ecosystem for Digital Microfluidics - Status and Roadmap: Invited Paper.
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Xing Huang 0001, Chi-Chun Liang, Jia Li, Tsung-Yi Ho, and Chang-Jin Kim 0001
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- 2019
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5. Capicua suppresses colorectal cancer progression via repression of ETV4 expression
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Jeon-Soo Lee, Eunjeong Kim, Jongeun Lee, Donghyo Kim, Hyeongjoo Kim, Chang-Jin Kim, Sanguk Kim, Dongjun Jeong, and Yoontae Lee
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Colorectal cancer ,Capicua (CIC) ,Polyoma enhancer activator 3 (PEA3) ,ETS translocation variant 4 (ETV4) ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 ,Cytology ,QH573-671 - Abstract
Abstract Background Although major driver gene mutations have been identified, the complex molecular heterogeneity of colorectal cancer (CRC) remains unclear. Capicua (CIC) functions as a tumor suppressor in various types of cancers; however, its role in CRC progression has not been examined. Methods Databases for gene expression profile in CRC patient samples were used to evaluate the association of the levels of CIC and Polyoma enhancer activator 3 (PEA3) group genes (ETS translocation variant 1 (ETV1), ETV4, and ETV5), the best-characterized CIC targets in terms of CIC functions, with clinicopathological features of CRC. CIC and ETV4 protein levels were also examined in CRC patient tissue samples. Gain- and loss-of function experiments in cell lines and mouse xenograft models were performed to investigate regulatory functions of CIC and ETV4 in CRC cell growth and invasion. qRT-PCR and western blot analyses were performed to verify the CIC regulation of ETV4 expression in CRC cells. Rescue experiments were conducted using siRNA against ETV4 and CIC-deficient CRC cell lines. Results CIC expression was decreased in the tissue samples of CRC patients. Cell invasion, migration, and proliferation were enhanced in CIC-deficient CRC cells and suppressed in CIC-overexpressing cells. Among PEA3 group genes, ETV4 levels were most dramatically upregulated and inversely correlated with the CIC levels in CRC patient samples. Furthermore, derepression of ETV4 was more prominent in CIC-deficient CRC cells, when compared with that observed for ETV1 and ETV5. The enhanced cell proliferative and invasive capabilities in CIC-deficient CRC cells were completely recovered by knockdown of ETV4. Conclusion Collectively, the CIC-ETV4 axis is not only a key module that controls CRC progression but also a novel therapeutic and/or diagnostic target for CRC.
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- 2020
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6. Genomic Insight into Shimazuella Soli Sp. Nov. Isolated from Soil and Its Putative Novel Class II Lasso Peptide
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Chun-Zhi Jin, Jong Min Lee, Chang-Jin Kim, Hyung-Gwan Lee, and Kee-Sun Shin
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Shimazuella soli sp. nov. ,polyphasic taxonomy ,lasso peptide ,genome mining ,Technology ,Biology (General) ,QH301-705.5 - Abstract
The strain designated as AN120528T was isolated from farmland soil in South Korea. This strain grows well on R2A medium at 28 °C. The cells are an off-white colour and have no hyphae. The phylogenetic analysis indicated that the strain is a member of the genus Shimazuella with a 98.11% similarity to Shimazuella alba KC615T and a 97.05% similarity to S. kribbensis KCTC 9933T, respectively. The strain AN120528T shares common chemotaxonomic features with the other two type strains in the genus. It has MK-9 (H4) and MK-10 (H4) as its predominant menaquinones. The major fatty acids are iso-C14:0, iso-C15:0, anteiso-C15:0 and iso-C16:0. Diphosphatidylglycerol (DPG), phosphatidylethanolamine (PE), phosphatidylglycerol (PG), lipids (L), and aminolipids (AL) were identified as the major cellular polar lipids. Analysis of the peptidoglycan showed the presence of meso-diaminopimelic acid. Whole-genome sequencing revealed that the genome of the strain is approximately 3.3 Mbp in size. The strain showed a 77.5% average nucleotide identity (ANI) with S. alba KC615T. The genomic DNA (gDNA) G + C content is 39.0%. Based on polyphasic taxonomy analysis, it is proposed that this strain, AN120528T, represents a novel species in the genus Shimazuella, designated as Shimazuella soli sp. nov. The type stain is AN120528T (=KCTC 39810T = DSM 103571T). Furthermore, shimazuellin I, a new 15-amino-acid peptide, was discovered in the AN120528T through genome mining; it has the features of a lasso peptide, containing eight amino acids (-G-Q-G-G-S-N-N-D-) that form a macrolactam ring and seven amino acids (-D-G-W-Y-H-S-K-) that form a tail.
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- 2022
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7. Effect of Paternal DNA Damage on Paternal DNA Degradation and Early Embryonic Development in Mouse Embryo: Supporting Evidence by GammaH2AX Expression
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Chang Jin Kim and Kyung-Bon Lee
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dna degradation ,dna fragmentation ,dna licensing ,dna replication ,gammah2ax ,Biotechnology ,TP248.13-248.65 ,Medicine (General) ,R5-920 ,Internal medicine ,RC31-1245 - Abstract
This study was investigated to test whether the zygote recognized the topoisomerase II beta (TOP2B) mediated DNA fragmentation in epididymal spermatozoa or the nuclease degradation in vas deferens spermatozoa by testing for the presence of gammaH2AX (γH2AX). The γH2AX is phosphorylation of histone protein H2AX on serine 139 occurs at sites flanking DNA double-stranded breaks (DSBs). The presence of γH2AX in the pronuclei of mouse zygotes which were injected with DNA broke epididymal spermatozoa was tested by immunohistochemistry at 5 and 9 h post fertilization, respectively. Paternal pronuclei that arose from epididymal spermatozoa treated with divalent cations did not stain for γH2AX at 5 h. On the other hand, in embryos injected with vas deferences spermatozoa that had been treated with divalent cations, γH2AX was only present in paternal pronuclei, and not the maternal pronuclei at 5 h. Interestingly, both pronuclei stained positively for γH2AX for all treatments and controls at 9 h after sperm injection. In conclusion, the embryos recognize DNA that is damaged by nuclease, but not by TOP2B because H2AX in phosphorylated in paternal pronuclei resulting from spermatozoa treated with fragmented DNA from vas deferens spermatozoa treated with divalent cations, but not from epididymal spermatozoa treated the same way.
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- 2019
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8. Biocatalytic Synthesis of Non-Natural Monoterpene O‑Glycosides Exhibiting Superior Antibacterial and Antinematodal Properties
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Puspalata Bashyal, Ramesh Prasad Pandey, Samir Bahadur Thapa, Min-Kyoung Kang, Chang-Jin Kim, and Jae Kyung Sohng
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Chemistry ,QD1-999 - Published
- 2019
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9. Small droplet, big world
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Luquan Ren, Chang‐Jin Kim, and Zuankai Wang
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Descriptive and experimental mechanics ,QC120-168.85 - Published
- 2022
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10. Sensor Application Using UWB Communication: In-Vehicle Seat Occupancy Detection
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Chang Jin Kim, Byeongkeun Han, Junyoung Lee, SunWoo Jung, and Byung-Jun Jang
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General Medicine - Published
- 2023
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11. Streptomyces sp. AN090126 as a Biocontrol Agent against Bacterial and Fungal Plant Diseases
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Khanh Duy Le, Nan Hee Yu, Ae Ran Park, Dong-Jin Park, Chang-Jin Kim, and Jin-Cheol Kim
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Streptomyces ,antimicrobial activity ,biocontrol agent ,VOCs ,synergistic effect ,Biology (General) ,QH301-705.5 - Abstract
Bacteria and fungi are major phytopathogens which substantially affect global agricultural productivity. In the present study, Streptomyces sp. AN090126, isolated from agricultural suppressive soil in Korea, showed broad-spectrum antagonistic activity against various phytopathogenic bacteria and fungi. In the 96-well plate assay, the fermentation filtrate of Streptomyces sp. AN090126 exhibited antimicrobial activity, with a minimum inhibitory concentration (MIC) of 0.63–10% for bacteria and 0.63–3.3% for fungi. The MIC of the partially purified fraction was 20.82–250 µg/mL for bacteria and 15.6–83.33 µg/mL for fungi. Gas chromatography–mass spectrometry (GC-MS) analysis revealed that AN090126 produced various volatile organic compounds (VOCs), including dimethyl sulfide and trimethyl sulfide, which inhibited the growth of pathogenic bacteria and fungi in in vitro VOC assays. In pot experiments, the fermentation broth of Streptomyces sp. AN090126 reduced tomato bacterial wilt caused by Ralstonia solanacearum, red pepper leaf spot caused by Xanthomonas euvesicatoria, and creeping bentgrass dollar spot caused by Sclerotinia homoeocarpa in a dose-dependent manner. Moreover, the secondary metabolites derived from this strain showed a synergistic effect with streptomycin sulfate against streptomycin-resistant Pectobacterium carotovorum subsp. carotovorum, the causative agent of Kimchi cabbage soft rot, in both in vitro and in vivo experiments. Therefore, Streptomyces sp. AN090126 is a potential biocontrol agent in controlling plant diseases caused by pathogenic bacteria and fungi, specifically by the streptomycin-resistant strains.
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- 2022
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12. Expression of Spermine Oxidase Is Associated with Colorectal Carcinogenesis and Prognosis of Patients
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Sooyoun Kim, Doyeon Kim, Sanghyun Roh, Inpyo Hong, Hyeongjoo Kim, Tae Sung Ahn, Dong Hyun Kang, Moon Soo Lee, Moo-Jun Baek, Hyoung Jong Kwak, Chang-Jin Kim, and Dongjun Jeong
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colorectal cancer (CRC) ,SMOX ,prognostic marker ,therapeutic target ,Biology (General) ,QH301-705.5 - Abstract
Uncovering tumor markers of colorectal cancer is important for the early detection and prognosis of the patients. Spermine oxidase (SMOX) is upregulated in various cancers. The present study aims to explore the biologic function and expression patterns of SMOX in colorectal cancer (CRC), the third most common type of cancer worldwide. We used quantitative real-time PCR, Western blot, and in vitro functional studies in four CRC cell lines knocked down by SMOX siRNA and immunohistochemistry in 350 cases of CRC tissues. The results showed that SMOX was overexpressed in CRC cell lines and clinical samples. SMOX overexpression in tumor tissues was an independent prognostic factor, worsening overall survival (p = 0.001). The knock-down of SMOX inhibited CRC cell proliferation, invasion, and soft agar colony formation, uncovering its carcinogenic functions. This study indicated that SMOX overexpression could be an important oncogene in CRC and might serve as a valuable prognostic marker and potential therapeutic target for CRC.
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- 2022
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13. Microsurgical treatment outcomes of brainstem cavernous malformation: Subgroup comparison depending on application of intraoperative neurophysiologic monitoring
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Joonho Byun, M.D., Jae Sung Ahn, M.D., Ph.D., Wonhyoung Park, M.D., Seok Ho Hong, M.D., Ph.D., Young-Hoon Kim, M.D., Ph.D., Chang Jin Kim, M.D., Ph.D., Jeong Hoon Kim, M.D., Ph.D., and Seungjoo Lee, M.D., Ph.D.
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Surgery ,RD1-811 ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Objectives: Controversies regarding effectiveness of intraoperative neurophysiologic monitoring (IONM) in resection of brainstem cavernous malformations (CMs) have been argued. Immediate postoperative surgical outcomes, long term functional outcomes including cranial nerve deficits prognosis and modified Rankin Scale (mRS) were investigated. Methods: Total 47 patients of brainstem CMs who underwent surgery from January 2000 to November 2016 were identified and analyzed. All patients' clinical, radiological and surgical records were obtained and reviewed. Results: The incidence of aggravation of immediate postoperative pre-existing neurological deficits in surgery without IONM and with IONM group were 41.7% and 20%, respectively (p = 0.04). The incidence of newly developing postoperative neurological deficits in surgery without IONM and with IONM were 50% and 20%, respectively (p = 0.06). The postoperative surgical complications such as intracerebral hemorrhage/intraventricular hemorrhage, subdural hemorrhage, cerebrospinal fluid leakage, hydrocephalus were occurred 16.6% vs 8.7% in surgery without IONM and with IONM group, respectively (p = 0.06). The functional outcomes of each cranial nerve were not statistically significant. There was no statistically significant factor affecting immediate postoperative neurological deterioration in univariate analysis. The mRS after 1-year in surgery with IONM group showed statistically significant improvement compared to preoperative and 1-month postoperative period (from 3.4 to 1.87, p
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- 2018
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14. Non-Markovian Regime-Switching Models.
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Chang-Jin Kim and Jaeho Kim
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- 2023
15. Clinical Implications of the Mitotic Index as a Predictive Factor for Malignant Transformation of Atypical Meningiomas
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Sae Min Kwon, Jeong Hoon Kim, Young-Hoon Kim, Seok Ho Hong, Young Hyun Cho, Chang Jin Kim, and Soo Jeong Nam
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General Neuroscience ,otorhinolaryngologic diseases ,Surgery ,Neurology (clinical) ,neoplasms ,nervous system diseases - Abstract
Objective : Intracranial atypical meningiomas have a poor prognosis and high rates of recurrence. Moreover, up to one-third of the recurrences undergo high-grade transformation into malignant meningiomas. We aimed to investigate the clinical factors that can predict the propensity of malignant transformation from atypical to anaplastic meningiomas.Methods : Between 2001 and 2018, all patients with atypical meningioma, in whom the tumors had undergone malignant transformation to anaplastic meningioma, were included. The patients’ medical records documenting the diagnosis of atypical meningioma prior to malignant transformation were reviewed to identify the predictors of transformation. The control group comprised 56 patients with atypical meningiomas who were first diagnosed between January 2017 and December 2018 and had no malignant transformation.Results : Nine patients in whom the atypical meningiomas underwent malignant transformation were included. The median time interval from diagnosis of atypical meningioma to malignant transformation was 19 months (range, 7–78). The study group showed a significant difference in heterogeneous enhancement (77.8% vs. 33.9%), bone invasion (55.6% vs. 12.5%), mitotic index (MI; 14.8±4.9 vs. 3.5±3.9), and Ki-67 index (20.7±13.9 vs. 9.5±7.1) compared with the control group. In multivariate analysis, increased MI (odds ratio, 1.436; 95% confidence interval, 1.127–1.900; p=0.004) was the only significant factor for predicting malignant transformation.Conclusion : An increased MI within atypical meningiomas might be used as a predictor of malignant transformation. Tumors at high risk for malignant transformation might require more attentive surveillance and management than other atypical meningiomas.
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- 2022
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16. High Expression of Tetraspanin 5 as a Prognostic Marker of Colorectal Cancer
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Sanghyun Roh, Sooyoun Kim, Inpyo Hong, Minho Lee, Han Jo Kim, Tae Sung Ahn, Dong Hyun Kang, Moo-Jun Baek, Hyoung Jong Kwak, Chang-Jin Kim, and Dongjun Jeong
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Inorganic Chemistry ,Organic Chemistry ,General Medicine ,Physical and Theoretical Chemistry ,Molecular Biology ,Spectroscopy ,Catalysis ,colorectal cancer ,prognostic biomarker ,therapeutic target ,biomarker ,TSPAN5 ,Computer Science Applications - Abstract
Cancer is a major disease and the leading cause of death worldwide, with colorectal cancer (CRC) being the third-most common cancer in Korea. The survival rate associated with CRC reduces as the disease stage increases. Therefore, its early detection and treatment can greatly increase patient survival rates. In this study, we identified the tetraspanin 5 (TSPAN5) gene as an important biomarker for predicting the prognosis of patients with CRC. A TMA slide was used for statistical analysis. pN and clinical stage were found to be significant factors according to chi-square analysis, whereas pT, pN, metastasis, clinical stage, and TSPAN5 expression were significant according to Cox regression analysis. In order to prove the usefulness of TSPAN5, which is overexpressed in patients with metastatic CRC, as a biomarker, proliferation, migration, invasion, and tumorigenicity were examined using cell lines inhibited using small interfering RNA. The evaluations confirmed that TSPAN5 suppression, in turn, suppressed proliferation, migration, invasion, and tumorigenesis, which are characteristic of cancer cells. Therefore, the evaluation of TSPAN5 expression may help observe the prognosis of CRC and determine an appropriate treatment method for patients with CRC.
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- 2023
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17. A bipolar >40-V driver in 45-nm SOI CMOS technology.
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Yousr Ismail, Chang-Jin Kim 0001, and Chih-Kong Ken Yang
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- 2013
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18. Performance Evaluation of Blue Light Meters in the Market
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Gu Hwa Seo, Myoung-Hoon Jung, Chang-Jin Kim, and Eun Jung Choi
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- 2021
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19. Characterization of Streptomyces netropsis Showing a Nematicidal Activity against Meloidogyne incognita
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Ja Yeong Jang, Jin-Cheol Kim, Yong Ho Choi, Yoon-Jung Joo, Hun Kim, Kyoung Soo Jang, Gyung Ja Choi, Chang-Jin Kim, Byeongjin Cha, and Hae Woong Park
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Biocontrol ,Bio-nematicide ,Meloidogyne incognita ,Nematicidal activity ,Agriculture (General) ,S1-972 - Abstract
Control of nematode has become difficult owing to the restricted use of effective soil fumigant, methyl bromide, and other non-fumigant nematicides. Therefore, it is urgently necessary to develop microbial nematicide to replace chemical nematicides. In this study, the 50% aqueous methanol extraction solution of fermentation broths of 2,700 actinomycete strains were tested for their nematicidal activity against second stage of juveniles (J2s) of Meloidogyne incognita. As the results, only the 50% aqueous methanol extraction solution of AN110065, at 20% equivalent to 10% fermentation broth, showed strong nematicidal activity with 78.9% of mortality 24 h after treatment and 94.1% of mortality at 72 h. The 16S rRNA gene sequencing showed that the strain sequence was 99.78% identical to Streptomyces netropsis. The extract of S. netropsis AN110065 fermentation broth was successively partitioned with ethyl acetate and butanol and then the ethyl acetate, butanol and water layers were investigated for their nematicidal activity against the M. incognita. At 1,000 mg/ml, ethyl acetate layer showed the strongest activity of 83.5% of juvenile mortality 72 h after treatment. The pot experiment using the fermentation broth of AN110065 on tomato plant against M. incognita displayed that it evidently suppressed gall formation at a 10-fold diluent treatment. The tomato plants treated with the fermentation broth of S. netropsis AN110065 did not show any phytotoxicity. The results suggest that S. netropsis AN110065 has a potential to serve as microbial nematicide in organic agriculture.
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- 2015
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20. An Exploratory Study on Publicness from Xunzi’s Philosophy
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Chang-jin Kim, Hae Won Chung, and Suho Bae
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Exploratory research ,General Earth and Planetary Sciences ,Sociology ,General Environmental Science ,Epistemology - Published
- 2021
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21. Formal Embedded Operating System Model Based on Resource-Based Design Framework.
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Jin Hyun Kim, Jae-Hwan Sim, Chang-Jin Kim 0002, and Jin-Young Choi
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- 2007
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22. Transformation of the Ravenscar Profile Based Ada Real-time Application to the Verification-ready Statecharts: Reverse Engineering and Statemate approach.
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Chang-Jin Kim 0002 and Jin-Young Choi
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- 2006
23. Genomic Insight into
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Chun-Zhi, Jin, Jong Min, Lee, Chang-Jin, Kim, Hyung-Gwan, Lee, and Kee-Sun, Shin
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The strain designated as AN120528
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- 2022
24. Nocardioides antri sp. nov., Isolated from Soil in a Rock Cave
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Dong-Jin Park, Chun-Zhi Jin, So Hee Park, Min-Kyoung Kang, Jong Min Lee, and Chang-Jin Kim
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Whole genome sequencing ,0303 health sciences ,food.ingredient ,Phylogenetic tree ,biology ,Strain (chemistry) ,030306 microbiology ,Nocardioides ,General Medicine ,Diamino acid ,16S ribosomal RNA ,biology.organism_classification ,Applied Microbiology and Biotechnology ,Microbiology ,03 medical and health sciences ,chemistry.chemical_compound ,food ,chemistry ,Peptidoglycan ,Bacteria ,030304 developmental biology - Abstract
A Gram-positive, aerobic, rod-shaped, non-spore-forming bacterium, designated as BN140041T, was isolated from cave soil at Gubyeongsan Mountain, Boeun-gun, Chungbuk province in Republic of Korea. Phylogenetic analysis of the 16S rRNA gene sequence showed that the strain is closely related to Nocardioides silvaticus S-34 T, N. pelophilus THG-T63T, and N. immobilis FLL521T with 97.4%, 97.1%, and 96.8% similarity. The draft genome length was 4.27 Mb containing 424 contigs with a DNA G + C content of 70.5 mol%. The ANI value between strain BN140044T and its closely related species N. silvaticus S-34 T was 82.6%. The genome sequence of BN140041T displayed a key enzyme involved in the bioremediation of organic pollutants. The diagnostic diamino acid of peptidoglycan was LL-2,6-diaminopimelic acid. The major respiratory quinone was MK-8(H4), and the major fatty acids (> 5% of the total fatty acids) were iso-C16:0 (55.3%), C18:1ω9c (7.7%) and iso-C17:0 (5.7%). The polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine, and phosphatidylinositol. The results of genotypical, physiological, and biochemical characterization allow the phenotypic differentiation of strain BN140041T from related the Nocardioides strains. Therefore, strain BN140041T represents a novel species of the genus Nocardioides, for which we propose the name Nocardioides antri sp. nov. The type strain is BN140041T (= KCTC 49080 T = CCTCC AB 2018226 T).
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- 2021
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25. Description of desferrioxamine-producing bacterium Chitinophaga agrisoli sp. nov., isolated from soil
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Dong-Jin Park, Chun-Zhi Jin, Long Jin, Min-Jiao Liu, Dong Hyo Kang, Chang-Jin Kim, and Jong Min Lee
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DNA, Bacterial ,0106 biological sciences ,0301 basic medicine ,Deferoxamine ,010603 evolutionary biology ,01 natural sciences ,Microbiology ,Agar plate ,Soil ,03 medical and health sciences ,RNA, Ribosomal, 16S ,Molecular Biology ,Gene ,Phylogeny ,Soil Microbiology ,Whole genome sequencing ,Phylogenetic tree ,biology ,Strain (chemistry) ,Bacteroidetes ,Chemistry ,Fatty Acids ,Vitamin K 2 ,Sequence Analysis, DNA ,General Medicine ,biology.organism_classification ,16S ribosomal RNA ,Bacterial Typing Techniques ,genomic DNA ,030104 developmental biology ,Bacteria - Abstract
A Gram-stain-negative, non-motile, yellow-pigmented and non-spore forming rod-shaped bacterium, designated strain BN140078T, was isolated from farmland soil, Chungbuk, Republic of Korea. It was able to grow aerobically at 10–40 °C (optimum 28 °C), pH 5.5–7.5 (optimum pH 7.0) and with 0–2.0% (w/v) NaCl concentration (optimum 1.0%) on Reasoner’s 2A (R2A) agar medium. Comparative 16S rRNA gene sequence analysis showed that the strain BN140078T had 96.9%, 96.5% and 96.1% 16S rRNA gene similarities with Chitinophaga ginsengihumi KACC 17604T, Chitinophaga rupis KACC 14521T and Chitinophaga japonensis KACC 12057T, respectively. The predominant respiratory quinone was menaquinone MK-7 and the major fatty acids (≥ 5%) were C16:1 ω5c, iso-C15:0, iso-C17:0 3-OH and Summed Feature 3 (C16:1 ω7c and/or C16:1 ω6c). The polar lipids were composed of phosphatidylethanolamine, four unidentified amino lipids and six unidentified lipids. The genomic DNA G+C content was 49.5 mol%. The genome of strain BN140078T comprises a number of biosynthetic gene clusters for secondary metabolites, in particular those for non-ribosomal peptide products. The polyphasic taxonomic study clearly distinguished this strain from its closest phylogenetic neighbors. Thus, we propose that the BN140078T represents a novel species of the genus Chitinophaga, for which the name Chitinophaga agrisoli sp. nov. was proposed. The type strain is BN140078T (=KCTC 62555T = CCTCC AB 2018162T).
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- 2021
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26. Disaster-safety Vulnerable Class Derivation of Priority Factors for Disaster Resilience
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Chang Jin Kim, Eun Kyung No, and Gi Geun Yang
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Class (computer programming) ,Order (exchange) ,Local government ,Analytic hierarchy process ,Support system ,General Medicine ,Resilience (network) ,Environmental planning - Abstract
This study was conducted to increase the resilience of the disaster-safety vulnerable class. To this end, AHP analysis was conducted focusing on the factors of Disaster resilience of the disaster-safety vulnerable groups. The AHP survey was distributed to disaster experts(public officials, researchers, etc.), and a total of 10 surveys were analyzed. Analysis result, the priority factors for resilience of the disaster-safety vulnerable groups were community factors(0.371) → legal system factors(0.300) → economic factors(0.170) → disaster psychology factors(0.159). The priority within each factor is laws(ordinances), resident participation, local government-community trust, and support systems were derived. In order to enhance the resilience, administrative and policy implications for local government-community trust and resident participation were presented in amendment and supplementation of local government ordinances and implementation of support systems within local communities.
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- 2021
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27. Nematicidal activity of teleocidin <scp>B4</scp> isolated from <scp> Streptomyces sp. </scp> against <scp>pine wood nematode</scp> , <scp> Bursaphelenchus xylophilus </scp>
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Min-Jiao Liu, Chang-Jin Kim, Junheon Kim, Min-Kyoung Kang, Hae-Ryong Park, Jong Min Lee, So Hee Park, Chun Zhi Jin, Min-Hee Kim, Young Ho Kim, and Dong-Jin Park
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biology ,Hatching ,Streptomyces blastmyceticus ,Bursaphelenchus xylophilus ,General Medicine ,biology.organism_classification ,Streptomyces ,Plant disease ,Microbiology ,Nematode ,Insect Science ,Xylophilus ,Agronomy and Crop Science ,Wilt disease - Abstract
Background Pine wilt disease (PWD) is a plant disease that causes serious damage to pine trees. PWD occurs when the host plant is infected with pinewood nematode (PWN), Bursaphelenchus xylophilus. In this study, a compound with nematicidal activity was isolated from actinomycetes and its efficacy was investigated in vitro. Result We screened and selected Streptomyces sp. 680560, which had nematicidal activity against B. xylophilus. Based on 16S rRNA sequence analysis, it showed 99.93% similarity with Streptomyces blastmyceticus NRRB-5480T . Furthermore, the active compound was isolated and was identified as teleocidin B4. Teleocidin B4 at concentrations ranging from 6.25 to 100 μM had low nematicidal activity after 24 and 36 h against adult and stage juveniles (J2) of B. xylophilus, but after 48 h, nematicidal activity exceeded 95%. The rate of inhibition of egg hatching for Teleocidin B4 6.25, 12.5, 25, 50, and 100 μM was confirmed to be dose-dependently inhibited after 48 h of treatment. Teleocidin B4 is not only toxic to hatched B. xylophilus, but also affects egg hatching. Conclusion In conclusion, this study was carried out to isolate actinomycete metabolites from pine tree endophytes from various natural environments for control of pine wilt disease. A compound with nematicidal activity was isolated from a selected strain and its structure was identified as teleocidin B4. The nematicidal effect of the isolated active substance, teleocidin B4, was confirmed. This is the first report of the effect of teleocidin B4 on B. xylophilus, suggesting its possibility as a PWD control agent. This article is protected by copyright. All rights reserved.
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- 2021
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28. Breaking The Resistivity Barrier.
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R. Timothy Edwards and Chang-Jin Kim 0001
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- 2001
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29. The Predictive Relationship Between Teaching Experience and Work Absorption, Work Enjoyment, and Intrinsic Work Motivation
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Chang, Jin Kim and Chang, Jin Kim
- Abstract
The purpose of this bivariate linear research design study was to discover if there was a predictive relationship between the experience of teachers working in General Education Development (GED) programs and the presence of work absorption, work enjoyment, and intrinsic work motivation. A teacher shortage was on the rise and a different perspective using the theoretical frameworks of flow and growth mindset brought about further dialogue in addressing the situation. The preeminent theory used in this dissertation was flow theory, which was comprised of nine components. This dissertation focused on the three components of flow theory emphasized in the Work-Related Flow (WOLF) inventory that embodied work satisfaction and work motivation in: (1) work absorption, (2) work enjoyment, and (3) intrinsic work motivation. The WOLF inventory and participant demographics were administered and collected virtually to a convenience sample of 112 teachers of GED programs in Virginia and North Carolina. This research was a quantitative bivariate linear regression design, and the information was evaluated to see if there was a predictive relationship between years of teaching and the three criterion variables of flow in the WOLF inventory. The predictor variable was the number of years teaching, and the three criterion variables of flow were: work absorption, work enjoyment, and intrinsic work motivation. There were three research questions. The researcher failed to reject null hypotheses one, two, and three indicating there was no significant predictive relationship between the experience of teachers working in GED programs and the presence of absorption, work enjoyment, and intrinsic work motivation. Recommendations for future research included conducting qualitative research among the participants and expanding the research to mainstream schoolteachers.
- Published
- 2022
30. Microscale Liquid-Metal Switches - A Review.
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Prosenjit Sen and Chang-Jin Kim 0001
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- 2009
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31. Microhand With Internal Visual System.
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Wook Choi, Minoo Akbarian, Vladimir Rubtsov, and Chang-Jin Kim 0001
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- 2009
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32. Effect of Multiple Front Surface Aspheric Design Functional Contact Lenses on Accommodative Function and Visual Quality
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Hyun-Il Kim, Ye-Jin Yun, and Chang-Jin Kim
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Physics ,Visual acuity ,genetic structures ,business.industry ,Stray light ,media_common.quotation_subject ,eye diseases ,Contact lens ,Aberrations of the eye ,Spherical aberration ,Quality (physics) ,medicine ,Contrast (vision) ,Optometry ,medicine.symptom ,business ,Accommodation ,media_common - Abstract
Purpose : To compare the differences in visual quality and accommodative functions after wearing single and multiple front surface aspheric functional contact lenses in the twenties having sufficient accommodation. Methods : Thirteen subjects(21.38±0.65 years) were evaluated for visual acuity, contrast sensitivity, stray light, total higher order aberrations, spherical aberration, coma aberration, accommodative response, binocular accommodative facility and near point of accommodation after wearing two types of contact lenses, respectively. Results : There was no significant difference in visual acuity, contrast sensitivity, stray light, total high order aberration, spherical aberration and binocular accommodative facility. Coma aberration increased slightly in wearing multi front aspheric functional contact lenses at 4 and 5 mm pupil size(p=0.037). Accommodative response(p=0.006) and near point of accommodation(p=0.005) were significantly reduced and shorter in wearing multi front aspheric functional contact lens. Conclusion : There was no difference in visual quality in wearing multiple front aspheric functional contact lenses compared to in wearing single front aspheric contact lenses. But it is thought to be useful as a functional contact lens for young adults because it has the effect on reducing the accommodative burden.
- Published
- 2020
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33. An exploratory study of publicness from Han Feizi’s philosophy
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Hae Won Chung, Suho Bae, and Chang-jin Kim
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Semantic network analysis ,Exploratory research ,Sociology ,Epistemology - Published
- 2020
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34. TREND-CYCLE DECOMPOSITIONS OF REAL GDP REVISITED: CLASSICAL AND BAYESIAN PERSPECTIVES ON AN UNSOLVED PUZZLE
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Chang-Jin Kim and Jaeho Kim
- Subjects
Economics and Econometrics ,Stationary process ,Model selection ,05 social sciences ,Bayesian probability ,Trend stationary ,Variance (accounting) ,Bayesian inference ,Real gross domestic product ,0502 economics and business ,Econometrics ,Economics ,050207 economics ,Spurious relationship ,050205 econometrics - Abstract
While Perron and Wada (2009) show that postwar U.S. real GDP follows a trend stationary process (TSP) based on the maximum likelihood approach, our analysis based on the Bayesian approach shows that it is a difference stationary process (DSP) with the stochastic trend component explaining most of the variations in real GDP. One goal of this paper is to provide a comprehensive analysis on the sources of such different results and to suggest that more credibility should be conferred to the Bayesian inference. Another goal naturally is to re-investigate the trend-cycle decompositions within the Bayesian framework. This is done by employing a model that incorporates time variation in both the mean and variance. The Bayesian approach to model selection prefers a DSP model to a TSP model, even though the evidence is less than decisive. Empirical results also show that there exists convincing evidence that the cycle from the DSP model, which is small in magnitude and noisy, has out-of-sample predictive power for future output growth at short horizons. The highly persistent TSP cycle without any predictive power may be related to spurious periodicity discussed in Nelson and Kang (1981).
- Published
- 2020
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35. Impact of Disaster-vulnerable Population on Disaster Resilience
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Gi Geun Yang and Chang Jin Kim
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Geography ,Vulnerable population ,General Medicine ,Resilience (network) ,Environmental planning - Published
- 2020
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36. Role of gamma knife radiosurgery for recurrent or residual World Health Organization grade II and III intracranial meningiomas
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Chang Jin Kim, M. H. Kim, Do Hoon Kwon, Young Hyun Cho, Jeong Hoon Kim, and Sung Woo Roh
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Adult ,Male ,medicine.medical_specialty ,medicine.medical_treatment ,Gamma knife radiosurgery ,Gamma knife ,Radiosurgery ,World Health Organization ,World health ,Meningioma ,03 medical and health sciences ,0302 clinical medicine ,Meningeal Neoplasms ,medicine ,Humans ,Aged ,Retrospective Studies ,business.industry ,Role ,General Medicine ,Middle Aged ,medicine.disease ,Treatment Outcome ,030220 oncology & carcinogenesis ,Female ,Surgery ,Neurology (clinical) ,Radiology ,Neoplasm Recurrence, Local ,business ,030217 neurology & neurosurgery ,Follow-Up Studies - Abstract
Background: To analysis the role of gamma knife radiosurgery (GKRS) in treatment of the recurrent or residual World Health Organization (WHO) grade II and III meningiomas.Methods: Between 1995 and ...
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- 2020
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37. Salinarimonas soli sp. nov., isolated from soil
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Chun-Zhi Jin, Long Jin, Min-Jiao Liu, Min-Kyoung Kang, So Hee Park, Dong-Jin Park, and Chang-Jin Kim
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General Medicine ,Microbiology ,Ecology, Evolution, Behavior and Systematics - Abstract
A light pink coloured bacterium, designated strain BN140002T, was isolated from a soil sample collected in Goesan-gun, Chungcheongbuk-do, Republic of Korea. Cells of strain BN140002T were Gram-stain-negative, aerobic, motile and rod-shaped. Phylogenetic analysis based on 16S rRNA gene sequences showed 94.7, 94.7, 93.9, 93.3, 93.4 and 93.0% similarities to Salinarimonas rosea KCTC 22346T, Salinarimonas ramus DSM 22962T, Saliniramus fredricksonii HL-109T, Microvirga soli R491T, Chelatococcus caeni EBR-4-1T and Chelatococcus composti PC-2T, respectively. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine and phosphatidylethanolamine. The major cellular fatty acids were summed feature 8 (C18 : 1 ω7c and/or C18 : 1 ω6c) and summed feature 1 (C12 : 0 aldehyde and/or unknown 10.98) and the predominant ubiquinone was Q-10. The genomic DNA G+C content of strain BN140002T was 70.1 mol%. The genomic orthoANI values between strain BN140002T and Salinarimonas rosea KCTC 22346T and Salinarimonas ramus DSM 22962T were 75.0 and 74.8 %, respectively. Strain BN140002T had a class I-C type CRISPR-Cas system (CRISPR-associated helicase Cas3, CRISPR-associated protein Cas8c, CRISPR-associated protein Cas7, CRISPR-associated RecB family exonuclease Cas4, CRISPR-associated protein 1, 2). Based on phenotypic, chemotaxonomic and phylogenetic data, strain BN140002T should be assigned as a novel species of the genus Salinarimonas , for which the name Salinarimonas soli sp. nov. is proposed. The type strain is BN140002T (=KCTC 42643T=CCTCC AB 2017173T).
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- 2022
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38. Solihabitans fulvus gen. nov., sp. nov., a member of the family Pseudonocardiaceae isolated from soil
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Chun-Zhi Jin, Long Jin, Min-Jiao Liu, Jong-Min Lee, Dong-Jin Park, and Chang-Jin Kim
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General Medicine ,Microbiology ,Ecology, Evolution, Behavior and Systematics - Abstract
A polyphasic taxonomic study was carried out on an actinobacterial strain (AN110305T) isolated from soil sampled in the Republic of Korea. Cells of the strain were Gram-stain-positive, aerobic, non-motile and rod-shaped. Comparative 16S rRNA gene sequence studies showed a clear affiliation of strain AN110305T with Actinomycetia , with highest pairwise sequence similarities to Goodfellowiella coeruleoviolacea DSM 43935T (97.6%), Umezawaea tangerina MK27-91F2T (97.0%), Kutzneria chonburiensis NBRC 110610T (96.9%), Kutzneria buriramensis A-T 1846T (96.8%), Umezawaea endophytica YIM 2047XT (96.8%), Kutzneria albida NRRL B-24060T (96.7%) and Saccharothrix coeruleofusca NRRL B-16115T (96.6%). Cells of strain AN110305T formed pale-yellow colonies on Reasoner's 2A agar. MK-9 (H4) (68%) and MK-10 (H4) (32%) were the predominant menaquinones. Diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylmethyl ethanolamine, hydroxy-phosphatidylethanolamine, an unidentified aminolipid and an unidentified aminophospholipid were major polar lipids. Iso-C16:0 (24.5%), anteiso-C15:0 (19.3%), anteiso-C17:0 (15.7%) and iso-C15:0 (15.2%) were the major fatty acids and meso-diaminopimelic acid was the pepdidoglycan. The cell-wall sugars were composed of galactose, glucose, mannose and ribose. The genomic DNA G+C content was 70.7 mol%. Based on genotypic and phenotypic data, strain AN110305T could be distinguished from all genera within the family Pseudonocardiaceae and represents a novel genus and species named Solihabitans fulvus gen. nov., sp nov. The type strain is AN110305T (=KCTC 39307T =DSM 103572T).
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- 2022
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39. Nocardioides humilatus sp. nov., isolated from farmland soil in the Republic of Korea
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Jong Min Lee, Chun-Zhi Jin, Min-Kyoung Kang, So Hee Park, Dong-Jin Park, Dong-Gyun Kim, and Chang-Jin Kim
- Subjects
General Medicine ,Microbiology ,Ecology, Evolution, Behavior and Systematics - Abstract
A Gram-stain positive, aerobic, irregularly rod-shaped, non-spore-forming bacterium, designated as BN130099T, was isolated from farmland soil sampled in Goesan-gun, Chungbuk, Republic of Korea. Phylogenetic analysis of its 16S rRNA gene sequence showed that the strain is closely related to Nocardioides pelophilus KACC 19192T with 98.11 % similarity. The DNA G+C content of strain BN130099T was 68.84 mol% (draft genome sequence). The genome sequence of BN130099T displayed key enzymes involved in bioremediation of organic pollutants and biosynthetic clusters of saquayamycin. The strain contained ll-2,6-diaminopimelic acid in the cell-wall peptidoglycan and MK-8(H4) as the major respiratory quinone. The predominant fatty acid was iso-C16 : 0. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine and phosphatidylinositol. The results of physiological and biochemical characterization allowed the phenotypic differentiation of strain BN130099T from N. pelophilus KACC 19192T. The strain represents a novel species of the genus Nocardioides , for which we propose the name Nocardioides humilatus sp. nov. The type strain is BN130099T (=KCTC 49079T=CCTCC AB 2018135T).
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- 2022
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40. Bayesian Counterfactual Analysis of the Sources of the Great Moderation
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Chang-Jin, Kim, Morley, James, and Piger, Jeremy
- Published
- 2008
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41. Expression of Spermine Oxidase Is Associated with Colorectal Carcinogenesis and Prognosis of Patients
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Sooyoun Kim, Doyeon Kim, Sanghyun Roh, Inpyo Hong, Hyeongjoo Kim, Tae Sung Ahn, Dong Hyun Kang, Moon Soo Lee, Moo-Jun Baek, Hyoung Jong Kwak, Chang-Jin Kim, and Dongjun Jeong
- Subjects
Medicine (miscellaneous) ,General Biochemistry, Genetics and Molecular Biology ,digestive system diseases ,colorectal cancer (CRC) ,SMOX ,prognostic marker ,therapeutic target - Abstract
Uncovering tumor markers of colorectal cancer is important for the early detection and prognosis of the patients. Spermine oxidase (SMOX) is upregulated in various cancers. The present study aims to explore the biologic function and expression patterns of SMOX in colorectal cancer (CRC), the third most common type of cancer worldwide. We used quantitative real-time PCR, Western blot, and in vitro functional studies in four CRC cell lines knocked down by SMOX siRNA and immunohistochemistry in 350 cases of CRC tissues. The results showed that SMOX was overexpressed in CRC cell lines and clinical samples. SMOX overexpression in tumor tissues was an independent prognostic factor, worsening overall survival (p = 0.001). The knock-down of SMOX inhibited CRC cell proliferation, invasion, and soft agar colony formation, uncovering its carcinogenic functions. This study indicated that SMOX overexpression could be an important oncogene in CRC and might serve as a valuable prognostic marker and potential therapeutic target for CRC.
- Published
- 2021
42. Superhydrophobic drag reduction in turbulent flows: a critical review
- Author
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Chang-Jin Kim, Hyungmin Park, and Chang-Hwan Choi
- Subjects
Fluid Flow and Transfer Processes ,Turbulence ,Flow (psychology) ,Computational Mechanics ,General Physics and Astronomy ,Laminar flow ,Mechanics ,01 natural sciences ,010305 fluids & plasmas ,Key factors ,Mechanics of Materials ,Drag ,0103 physical sciences ,Surface roughness ,010306 general physics ,Reduction (mathematics) ,Geology ,Field conditions - Abstract
Superhydrophobic (SHPo) surfaces have been investigated vigorously since around 2000 due in large part to their unique potential for hydrodynamic frictional drag reduction without any energy or material input. The mechanisms and key factors affecting SHPo drag reduction have become relatively well understood for laminar flows by around 2010, as has been reviewed before [Lee et al. Exp Fluids 57:176 (2016)], but the progress for turbulent flows has been rather tortuous. While improved flow tests made positive SHPo drag reduction in fully turbulent flows more regular since around 2010, such a success in a natural, open water environment was reported only in 2020 [Xu et al. Phys Rev Appl 13:034056 (2020b)]. In this article, we review studies from the literature about turbulent flows over SHPo surfaces, with a focus on experimental studies. We summarize the key knowledge obtained, including the drag-reduction mechanism in the turbulent regime, the effect of the surface roughness morphology, and the fate and role of the plastron. This review is aimed to help guide the design and application of SHPo surfaces for drag reduction in the large-scale turbulent flows of field conditions. Graphic abstract
- Published
- 2021
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43. Correction to: Description of desferrioxamine-producing bacterium Chitinophaga agrisoli sp. nov., isolated from soil
- Author
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Chun-Zhi Jin, Long Jin, Dong Hyo Kang, Min-Jiao Liu, Jong Min Lee, Dong-Jin Park, and Chang-Jin Kim
- Subjects
General Medicine ,Molecular Biology ,Microbiology - Published
- 2022
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44. Nematicidal activities of aureothin and alloaureothin from endophytic bacteria, Streptomyces sp. AE170020, against the pine wood nematode, Bursaphelenchus xylophilus
- Author
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Min-Jiao Liu, Chang-Jin Kim, Junheon Kim, Kwang-Hee Son, Dong-Jin Park, Chun-Zhi Jin, Jonghoon Kim, and Min Kyoung Kang
- Subjects
Endophytic bacteria ,Nematode ,biology ,Pine wood ,Botany ,Bursaphelenchus xylophilus ,biology.organism_classification ,Alloaureothin ,Streptomyces - Abstract
Endophytic bacteria, a rich source of bioactive secondary metabolites, are ideal candidates for environmentally benign agents. In this study, an endophytic strain, Streptomyces sp. AE170020, was isolated and selected for the purification of nematicidal substances based on its high nematicidal activity. Two highly active components, aureothin and alloaureothin, were identified, and their chemical structures were determined using spectroscopic analysis. Both compounds suppressed the growth, reproduction, and behavior of Bursaphelenchus xylophilus. In in vivo experiments, the extracts of strain Streptomyces sp. AE170020 effectively suppressed the development of pine wilt disease in four-year-old plants of Pinus densiflora. The potency of secondary metabolites isolated from endophytic strains suggests applications in controlling Bursaphelenchus xylophilus and opens an avenue for further research on exploring bioactive substances against the pine wood nematode.
- Published
- 2021
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45. AN N-STATE ENDOGENOUS MARKOV-SWITCHING MODEL WITH APPLICATIONS IN MACROECONOMICS AND FINANCE
- Author
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Chang-Jin Kim, Jeremy M. Piger, and Shih-Tang Hwu
- Subjects
Economics and Econometrics ,Markov chain ,0502 economics and business ,05 social sciences ,Economics ,State (computer science) ,050207 economics ,Mathematical economics ,050205 econometrics - Abstract
We develop an N-regime Markov-switching model in which the latent state variable driving the regime switching is endogenously determined with the model disturbance term. The models structure captures a wide variety of patterns of endogeneity and yields a simple test of the null hypothesis of exogenous switching. We derive an iterative filter that generates objects of interest, including the model likelihood function and estimated regime probabilities. Using simulation experiments, we demonstrate that the maximum likelihood estimator performs well in finite samples and that a likelihood ratio test of exogenous switching has good size and power properties. We provide results from two applications of the endogenous switching model: a three-state model of US business cycle dynamics and a three-state volatility model of US equity returns. In both cases, we find statistically significant evidence in favor of endogenous switching.
- Published
- 2019
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46. Isolation of new streptimidone derivatives, glutarimide antibiotics from Streptomyces sp. W3002 using LC-MS-guided screening
- Author
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Jong Seog Ahn, Dong-Jin Park, Byeongsan Lee, Kyung Taek Heo, Jae Kyoung Lee, Chang-Jin Kim, Bang Yeon Hwang, Jae-Hyuk Jang, Sung-Kyun Ko, Mina Jang, Sangkeun Son, Young-Soo Hong, and Chan Sun Park
- Subjects
0301 basic medicine ,Pharmacology ,chemistry.chemical_classification ,Ketone ,biology ,010405 organic chemistry ,Stereochemistry ,030106 microbiology ,Glutarimide ,Ring (chemistry) ,biology.organism_classification ,01 natural sciences ,Streptomyces ,0104 chemical sciences ,03 medical and health sciences ,chemistry.chemical_compound ,Polyketide ,chemistry ,Amide ,Drug Discovery ,Molecule ,Moiety - Abstract
A LC-MS-guided screening led to the isolation of two new streptimidone derivatives (2 and 3) containing a glutarimide ring and two glutarimide ring-opened compounds (4 and 5) along with a known glutarimide-containing polyketide, streptimidone (1) from Streptomyces sp. W3002 strain. Their structures were elucidated by MS and NMR spectroscopic analyses and by comparison with data from the literature. Compound 2 is a non-hydroxylated analog at the C-5 position of streptimidone. The structure of 3 was determined as a streptimidone derivative possessing the α, β-unsaturated ketone moiety at positions C-5 and C-6. Compound 4 had similar chemical shifts and splitting patterns with 3, but the glutarimide ring is opened. Compound 5 closely resembles that of 4 with the only difference being the existence of an additional methoxy group instead of an amide group. Streptimidone (1) and 3 showed weak cytotoxic activity against three human cancer cell lines, respectively.
- Published
- 2019
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47. Malignant Transformation of a Rosette-Forming Glioneuronal Tumor to Glioblastoma
- Author
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Jeong Hoon Kim, Chang Jin Kim, Young Hoon Kim, Young Hyun Cho, Joonho Byun, Seok Ho Hong, and Sae Min Kwon
- Subjects
Male ,medicine.medical_specialty ,Rosette Formation ,Brain tumor ,Malignant transformation ,03 medical and health sciences ,0302 clinical medicine ,Glioneuronal tumor ,Cerebellar hemisphere ,medicine ,Humans ,Favorable outcome ,Fourth Ventricle ,medicine.diagnostic_test ,Brain Neoplasms ,business.industry ,Magnetic resonance imaging ,Middle Aged ,medicine.disease ,Neoplasms, Neuroepithelial ,Gross Total Resection ,030220 oncology & carcinogenesis ,Surgery ,Neurology (clinical) ,Radiology ,Neoplasm Recurrence, Local ,Glioblastoma ,business ,Cerebral Ventricle Neoplasms ,030217 neurology & neurosurgery - Abstract
Background A rosette-forming glioneuronal tumor (RGNT), a rare brain tumor, presents as a benign feature with a favorable outcome. To date, a few cases with aggressive behaviors, such as recurrence or dissemination, but none with malignant transformation, have been reported. We describe 1 case that recurred as glioblastoma after complete resection of the benign RGNT. Case Description A man aged 58 years presented with headache and dizziness without neurologic symptoms. Magnetic resonance imaging showed a 4 × 2.5 cm, well-demarcated mass in the left cerebellar hemisphere. The patient underwent gross total resection of the tumor and a diagnosis of RGNT was made. There was no evidence of recurrence on serial follow-up. However, a recurrent heterogeneous enhancing mass in the previous surgical cavity was observed on a 7-year postoperative magnetic resonance imaging scan. Reoperation was performed and a histopathological study revealed a glioblastoma. Conclusions To the best of our knowledge, this is the first case of spontaneous malignant transformation of an RGNT. Our case may be helpful in better understanding the biological behavior and clinical outcome of RGNT. We emphasize the malignant potential of this rare tumor and the necessity of future large-scaled research for most appropriate therapeutic strategies.
- Published
- 2019
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48. 지방분권 인식 정도가 정부간 관계 인식에 미치는 영향 - 분쟁조정제도의 매개효과를 중심으로
- Author
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Sung-Woo Hong and Chang-jin Kim
- Subjects
Political science ,Gender studies - Published
- 2019
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- View/download PDF
49. A Study of Characteristics of Vibration and Shock for the Mounting Equipment of the Military Wheel Vehicle
- Author
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Man Dal Kim, Chang Jin Kim, and Dong Hyuk Kim
- Subjects
Vibration ,Materials science ,Shock response spectrum ,Mechanical Engineering ,Acoustics ,Safety, Risk, Reliability and Quality ,Transmissibility (structural dynamics) ,Industrial and Manufacturing Engineering ,Shock (mechanics) - Published
- 2019
- Full Text
- View/download PDF
50. Growth rate and fate of untreated hemangioblastomas: clinical assessment of the experience of a single institution
- Author
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Joonho Byun, Seok Ho Hong, Young Hyun Cho, Young Hoon Kim, Chang Jin Kim, Hee Jun Yoo, and Jeong Hoon Kim
- Subjects
Adult ,Male ,Cancer Research ,medicine.medical_specialty ,von Hippel-Lindau Disease ,Adolescent ,Gastroenterology ,Wait and scan ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Predictive Value of Tests ,Internal medicine ,Hemangioblastoma ,Outcome Assessment, Health Care ,medicine ,Humans ,Tumor growth ,Growth rate ,Single institution ,Cerebellar Neoplasms ,Child ,Aged ,Retrospective Studies ,business.industry ,Mean age ,Odds ratio ,Middle Aged ,medicine.disease ,Tumor Burden ,Survival Rate ,Natural history ,Neurology ,Oncology ,030220 oncology & carcinogenesis ,Female ,Neurology (clinical) ,business ,030217 neurology & neurosurgery ,Follow-Up Studies - Abstract
The growth rate and natural history of untreated hemangioblastomas remain unclear. This study investigated the natural history of untreated intracranial hemangioblastomas and predictors of tumor growth using volumetric assessment. This study retrospectively enrolled 31 patients with untreated hemangioblastomas between 2004 and 2017 who were followed up for at least 12 months. The 31 patients had a total of 52 hemangioblastomas. The 31 patients included 11 (35.5%) men and 20 (64.5%) women, of mean age 42.5 years. Seventeen (54.8%) patients were genetically diagnosed with Von Hippel-Lindau (VHL) disease. Of the 52 lesions, 33 (63.5%) grew during the follow-up period, whereas 19 (36.5%) remained stable. Overall mean actual growth rate (AGR) was 1.94 cm3/year, 2.38 cm3/year in the VHL and 1.79 cm3/year in the non-VHL group (p = 0.31). Overall mean relative growth rate (RGR) was 21%/year, 26%/year in the VHL and 19%/year in the non-VHL group. Time to 50% treatment probability was 34 months. The 1, 3, 5, and 7-year treatment probabilities were 11.5%, 50.1%, 52.7%, and 73%, respectively. The presence of only symptomatic lesions was significantly predictive of the growth of intracranial hemangioblastoma (odds ratio: 5.0, p = 0.02). The overall growth rate of intracranial hemangioblastoma was faster than that of other benign intracranial tumors, with symptomatic lesions being the only meaningful predictor of tumor growth. Because of their rapid growth rate and high probability of treatment, a wait and scan management strategy should be carefully applied to intracranial hemangioblastomas.
- Published
- 2019
- Full Text
- View/download PDF
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