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An Investigation on Developing the Shelter and Safety Facilities of FOREST KINDERGARTENS
Jeon Mi-ja,Park Ju-sik,Lim Won-hyeon J-INSTITUTE 2020 Protection Convergence Vol.5 No.1
This dissertation aims at investigating the geographical conditions, facilities, programs and status of the shelter and safety facilities of nine selected forest kindergartens in Gyeongsangbuk-do Province in Korea. Based on the surveys of instructors and participating teachers of forest kindergartens, this study provides several suggestions for improving the shelter and safety facilities of forest kindergartens. The surveyed forest kindergartens had an average of 2.5 forest kindergarten instructors, while the number of participating children in the programs were gradually increasing. In 2017, an average of 9,621.5 children participated in the programs. In some forest kindergartens, the number of participants increased more than two times, three times in 2017 compared to 2016. As a result, this study suggests following three improvements for the shelter and safety facilities in forest kindergartens. First, the scope of use of the shelters need to be expanded. Emergency kit should be kept in the shelters and the shelters should be constructed as fire-and-quake proof buildings. The shelters need to have air-conditioning and heating so that children can take a rest or enjoy more activities in the shelters. Second, safety facilities need to be improved to have more secure escape routes, more CCTVs and the safety facilities monitoring should be strengthened. Sign board for the children should also be improved to provide more details of the surrounding risks with pictures. Third, safety management should also be improved. Instructors and participating teachers of forest kindergartens need to have more training opportunities to learn how to utilize the shelter and safety facilities and they need to be more responsible and capable in securing safety in the daily activities in forest kindergartens.
Jeon, Jin-Hyeok,Cho, Won-Ju Institute of Physics 2019 Semiconductor science and technology Vol.34 No.1
<P>In this study, low-thermal-budget <I>in situ</I> microwave annealing of solution-processed indium–gallium–zinc oxide (IGZO) thin films was investigated as a potential alternative to the conventional high-thermal-budget annealing process. The low-temperature baking and high-temperature post-deposition annealing of the solution-processed IGZO film were continuously performed using the same microwave equipment, leading to a reduced heat treatment processing time and temperature. We compared the electrical characteristics of IGZO thin film transistors (TFTs) produced using single- and multi-step <I>in situ</I> microwave annealing methods with those of TFTs manufactured via the conventional annealing method and found that the proposed single-step microwave annealing method yielded TFTs with electrical characteristics better than those of the TFTs fabricated using the multi-step and conventional annealing methods. In addition, the reliability was evaluated by conducting positive and negative gate bias stress tests, in which the IGZO TFTs manufactured using the proposed heat treatment method proved superior to those fabricated via the conventional heat treatment method. We investigated the effects of heat treatment on the composition and energy band structures of the IGZO films by performing x-ray photoelectron spectroscopy analysis and found that the proposed <I>in situ</I> microwave annealing method is more effective than the conventional method in solution processing.</P>
Study on the Antioxidant Activities of Various Bio-materials by Extraction Method
Ju-Hyun Yang,Ye-Lim Jeon,Ji-Hyeon Oh,Seon-Kyung Hwang,Gang-Won Lee,Won-Yeoung Choi,Ji-Soon Im 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
In this study, polyphenol, flavonoid content, and radical scavenging activity were analyzed for 28 kinds of bio-materials to study antioxidant activity. The polyphenol content of the shaking extraction was 6.81∼1607.77mg TE/10g, and the content of sonicator extraction was 7.10∼1683.94mg TE/10g. The polyphenol was generally higher in the extract using shaking than in the extract using sonicator. The flavonoid content of the shaking extraction was 0.52∼443.65 mg RE/10g, and the content of the sonicator extraction was 1.01∼426.36 mg RE/10g. The material with the highest flavonoid was Chimhyang, and the lowest material was Andongma. The DPPH radical scavenging activity of shaking was 24.99∼95.24%, and the activity of sonicator was 26.83∼92.87%. The excellent antioxidant power of close to 90% was achieved in 6 items of Kumeunwha, Sukryu, Garlic, Bombyx, Camu camu, and Mogwha. The ABTS radical scavenging activity of shaking was 23.05-100%, and the activity of sonicator was 22.61-100%. The materials with the highest activity were found to be Yagwanmun, Chimhyang, Camu camu, Mogwha, and Banaba leaf in both shaking and sonicator.
Evaluation of the prognostic significances of γ-secretase genes in pancreatic cancer
Jeon, Yun Ho,Ha, Mihyang,Kim, Sung Won,Kim, Mun Ju,Lee, Chi-Seung,Oh, Chang-Kyu,Han, Myoung-Eun,Oh, Sae-Ock,Kim, Yun Hak D.A. Spandidos 2019 Oncology letters Vol.17 No.5
<P>With the growing requirement for novel prognostic biomarkers for pancreatic cancer, many studies have focused on clinical and/or genomic variables. Although many studies have been performed, carbohydrate antigen 19-9 is the only biomarker in clinical use. Therefore, the present study examined whether γ-secretase genes, including presenilin (<I>PSEN</I>), nicastrin (<I>NCSTN</I>), presenilin enhancer protein 2 (<I>PSENEN</I>), and anterior pharynx-defective 1 (<I>APH1</I>-), could serve as prognostic factors for pancreatic cancer. The cohorts selected included >100 pancreatic cancer patients. Patient data were downloaded from The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GSE21501). The prognostic roles of the γ-secretase genes were analyzed by several survival analysis methods. Among the γ-secretase genes, the prognosis tended to be worse in the 2 cohorts with increasing expression of <I>PSEN1, APH1A</I>, and <I>PSENEN</I>, while the remaining genes were the opposite in the 2 cohorts. Notably, although the patient characteristics were quite different, <I>APH1A</I> was statistically significantly associated with prognosis in the 2 cohorts. The hazard ratio of <I>APH1A</I> for overall survival was 1.598 (TCGA) and 2.724 (GSE21501). These results contribute to the study of γ-secretase in pancreatic cancer. We believe that γ-secretase, particularly <I>APH1A</I>, will be a new prognostic biomarker for pancreatic cancer.</P>
Ju, Sung-Min,Kim, Kun-Jung,Lee, Jong-Gil,Lee, Chai-Ho,Han, Dong-Min,Yun, Young-Gab,Hong, Gi-Yun,An, Won-Gun,Jeon, Byung-Hun The Physiological Society of Korean Medicine and T 2005 동의생리병리학회지 Vol.19 No.3
The tetrahydroisoquinolines included potent cytotoxic agents that showed antitumor activity,antimicrobial activity, and other biological properties. We studied the effect of CDST, 1-Chloromethyl-6,7-dimethoxy-3,4-dihydro-1H-isoquinoline-2-sulfonic acid amide, a newly synthesized anti-cancer agent. The cytotoxic activity of CDST in HL-60 cells was increased in a dose-dependent manner. CDST, tetrahydroisoquinolines derivative, was cytotoxic to HL-60 cells, with IC50 of $80{\mu}g/ml$. Treatment of CDST to HL-60 cells showed the fragmentation of DNA in a dose- and time dependent manner, suggesting that thesecells underwent apoptosis. Treatment of HL-60 cells with CDST was induced in a dose- and time-dependent activation of caspase-3, caspase-8 and proteolytic cleavage of poly(ADP-ribose) polymerase. In caspase activity assay, caspase-3 and -8 was activated after 12 h and 6 h posttreatment, respectively. CDST also caused the release of cytochrome c from mitochondria into the cytosol. CDST-induced cytochrome c release was mediated by caspase-8-dependent cleavage of Bid and Bax translocation. These results suggest that caspase-8 induced Bid cleavage and Bax translocation, caused mitochondrial cytochrome c release, and induce caspase-3 activationduring CDST-induced apoptosis in HL-60 cells.