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鄭宇珪,孫玲杰,成敏雄,金鼎錫 慶尙大學校 기초과학연구소 1992 基礎科學硏究所報 Vol.8 No.-
In this study the relationship among Juniperus chinensis and its seven varieties-J. chinensis var. procumbens, J. chinensis var. horizontalis, J. chinensis var sargentii, J. chinensis var, kaizuka, J. chinensis var. aureo-variegata, J. chinensis var. globosa, J. chinensis var. aureo-globosa-and J. rigida was studied by using the karyological methods. The results obtained from this study were as follows : In the karyotype analysis, J. chinensis, J. chinensis var. horizontalis, J. chinensis var. sargentii, J. chinensis var. globosa, J. chinensis var. aureo-globosa, and J. rigida were diploid with 2n=22, although J. chinensis var. procumbens, J. chinensis var. kaizuka and J. chinensis var. aureo-variegata were tetraploid with 2n=44. According to descending order of the total length of the chromosomes and the length of short and long arms, from the arrangement order of chromosomes and the position of centromeres, J. chinensis var. procumbens and J. chinensis var. horizontalis were categorized into the first group J. chinensis var. kaizuka and J. chinensis var. aureo-variegata were into the second group, and J. chinensis var, globosa and J. chinensis var. aureo-globosa were into the third group, respectively. Aneuploid(2n=26) in the C-band staining of J. chinensis var. aureo-variegata was identified, although it normally showed 2n=44 as karyotype. Because light was emitted from all chromatids of the samples by fluorescent light staining with DAPI, A-T rich regions would be located all over the chromatids.
수확 후 산채류의 미생물 제어를 위한 이산화염소수와 유기산 및 Blanching 병합 처리
강지훈(Ji Hoon Kang),박신민(Shin Min Park),김현규(Hyun Gyu Kim),손현정(Hyun Jung Son),이가연(Ka Yeon Lee),강길남(Kil-Nam Kang),박종태(Jong Tae Park),송경빈(Kyung Bin Song) 한국식품영양과학회 2016 한국식품영양과학회지 Vol.45 No.2
수확 후 산채류의 미생물학적 안전성을 확보하기 위해 선정된 산채류인 취나물과 곤드레에 이산화염소수와 유기산 용액 병합 처리 및 이산화염소수, 유기산 용액, blanching 병합처리 후 미생물 제어 효과를 비교 분석하였다. 50 ppm 이산화염소수와 0.5% citric acid 용액의 병합 처리는 취나물과 곤드레의 총 호기성 세균 수를 2.80~3.64 log CFU/g, 효모 및 곰팡이 수는 2.02~2.67 log CFU/g 감소시켰다. 50 ppm이산화염소수와 0.5% fumaric acid 용액의 병합 처리 후 총 호기성 세균 수는 대조구와 비교하여 3.62~3.82 log CFU/g 감소하였으며, 효모 및 곰팡이의 경우에는 2.47~3.02 log CFU/g 만큼 감소하여 이산화염소수와 citric acid 용액의 병합 처리보다 fumaric acid 용액과의 병합 처리가 더 효과적인 병합 처리 조건이라고 생각된다. 이산화염소수와 fumaric acid 병합 처리 후 blanching 처리된 취나물의 총 호기성 세균 수는 대조구보다 5.12 log CFU/g 더 낮게 검출되었으며, 효모 및 곰팡이는 검출되지 않았다. 곤드레의 경우에도 효모 및 곰팡이는 검출되지 않았으며, 총 호기성 세균 수는 대조구와 비교하여 4.59 log CFU/ g 감소하였다. 따라서 본 연구 결과 이산화염소수와 유기산 용액 전처리 후 blanching 병합 처리가 산채류의 미생물학적 안전성을 확보하는 가장 효과적인 방법이라고 판단된다. To improve the microbiological safety of wild vegetables after harvest, Aster scaber and Cirsium setidens Nakai were treated with combinations of 50 ppm aqueous chlorine dioxide (ClO₂)/0.5% citric acid or fumaric acid, and 50 ppm ClO₂/0.5% fumaric acid/blanching at 90°C for 2 min. Combined treatment of 50 ppm ClO₂ and 0.5% citric acid reduced populations of total aerobic bacteria, yeast, and molds in Aster scaber and Cirsium setidens Nakai by 2.80∼3.64 and 2.02∼2.67 log CFU/g, respectively, compared to those of the control. Combined treatment of 50 ppm ClO₂ and 0.5% fumaric acid reduced total aerobic bacteria, yeast and molds populations by 3.62∼3.82 and 2.47∼3.02 log CFU/g, respectively. Based on the results, combined treatment of ClO₂ and fumaric acid was more effective in controlling microorganisms in the wild vegetables than either ClO₂ or citric acid. In addition, combined treatment of ClO₂/fumaric acid/blanching reduced the populations of total aerobic bacteria by 4.59∼5.12 log CFU/g, and populations of yeast and molds were not detected by treatment. These results suggest that combined treatment of ClO₂/fumaric acid/blanching is the most effective method for improving microbiological safety of wild vegetables after harvest.
Chromia coating with nanofluid deposition and sputtering for accident tolerance, CHF enhancement
Son, Gyu Min,Kim, Kyung Mo,Bang, In Cheol Elsevier 2018 INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER - Vol.118 No.-
<P><B>Abstract</B></P> <P>In Fukushima accident, zirconium cladding was rapidly oxidized with high temperature steam, which ultimately led to hydrogen explosion. To overcome materialistic limitation, accident tolerant fuel (ATF) was suggested to improve safety response of nuclear power plants during accidents by modifying cladding surface with various coating materials. When chrome was coated on cladding surface, it showed fewer weight gain by high temperature oxidation compared to bare zirconium cladding. Chrome forms chrome oxide or chromia (Cr<SUB>2</SUB>O<SUB>3</SUB>) when oxidized, and this layer prevents further oxidation thus protecting inner material from oxidizing. However, previous studies indicated that implementation of chrome containing alloys have major drawbacks such as excessive coating thickness or degraded critical heat flux (CHF). Instead, direct coating of chromia was suggested in this study with the expectation of CHF enhancement compared to other chrome alloy coatings. Chromia nanoparticles were coated on nichrome wire surface with boiling deposition of chromia nanofluid. Another method was applying RF sputtering with chromia target. Chrome coating with DC sputtering were also tested for comparison. Verification of chromia coating was conducted by three steps: CHF measurement with wire pool boiling, high temperature oxidation in furnace to compare the oxidation resistance of specimens, and surface investigation. Surface characteristics investigation were conducted with measurement of contact angle by sessile drop method, capillary wicking height, and scanning electron microscope image. Experimental results show that chromia coating significantly increased CHF. Weight gain by oxidation indicate chromia nanofluid coating had improved oxidation resistance property.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Concept of chromia coating on nuclear fuel cladding. </LI> <LI> Chromia coating aims for accident tolerance and CHF enhancement. </LI> <LI> Feasibility of chromia coating is studied by pool boiling, sputtering, and oxidation. </LI> <LI> Chromia coating enhances both CHF and oxidation resistance. </LI> </UL> </P>
A genetic linkage map of rice using F1 DH plants with SSR markers
Gyu Ho Lee,Hyun Suk Lee,Min Gyu Kim,Seul Gi Park,Ye Jin Son,Jin Hee Kim,Jae Keun Sohn,Gihwan Yi,Kyung-Min Kim 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
Quantitative trait locus (QTL) mapping is a highly effective approach for studying genetically complex forms of plant shattering. With QTLs mapping, the shattering loci can be described. SSR marker is based on the imformation of Simple Sequence Repeat and easy to analyze using PCR and has high reproducibility. For analyzing QTLs associated with shattering, we selected 219 SSR markers from 254 SSR markers and used them for implementing Mapmaker(Ver. 3.0) and Mapchart(Ver. 2.2). Mapmaker help to calculate distances between each markers and Mapchart is a program for drawing Genetic map. This Genetic map of rice (Oryza sativa L.) covering 2082.4 cM with 9.5 cM between makers in the Kosambi function has been constructed using 120 F1 DH plants from a single cross between the indica variety Chungchung and the japonica variety Nagdong.
Min, Jae-Seok,Lee, Chang Min,Choi, Sung Il,Seo, Kyung Won,Park, Do Joong,Baik, Yong Hae,Son, Myoung-Won,Choi, Won Hyuk,Kim, Sungsoo,Pak, Kyung Ho,Kim, Min Gyu,Park, Joong-Min,Jeong, Sang Ho,Lee, Moon- The Korean Gastric Cancer Association 2018 Journal of gastric cancer Vol.18 No.3
Purpose: To investigate the current status of adjuvant chemotherapy (AC) regimens in Korea and the difference in efficacy of AC administered by surgical and medical oncologists in patients with stage II or III gastric cancers. Materials and Methods: We performed a retrospective observational study among 1,049 patients who underwent curative resection and received AC for stage II and III gastric cancers between February 2012 and December 2013 at 29 tertiary referral university hospitals in Korea. To minimize the influence of potential confounders on selection bias, propensity score matching (PSM) was used based on binary logistic regression analysis. The 3-year disease-free survival (DFS) rates were compared between patients who received AC administered by medical oncologists or surgical oncologists. Results: Between February 2012 and December 2013 in Korea, the most commonly prescribed AC by medical oncologists was tegafur/gimeracil/oteracil (S-1, 47.72%), followed by capecitabine with oxaliplatin (XELOX, 16.33%). After performing PSM, surgical oncologists (82.74%) completed AC as planned more often than medical oncologists (75.9%), with statistical significance (P=0.036). No difference in the 3-year DFS rates of stage II (P=0.567) or stage III (P=0.545) gastric cancer was found between the medical and surgical oncologist groups. Conclusions: S-1 monotherapy and XELOX are a main stay of AC, regardless of whether the prescribing physician is a medical or surgical oncologist. The better compliance with AC by surgical oncologists is a valid reason to advocate that surgical oncologists perform the treatment of AC for stage II or III gastric cancers.
Dong Gyu Min,Seul-Ki Son,Min Jeong Baek,Sun-Jae Park,Jong-Kook Jung 한국응용곤충학회 2023 한국응용곤충학회 학술대회논문집 Vol.2023 No.10
An outbreak of stick insects, Ramulus mikado, as forest pests in South Korea has become a topic of concern. While other countries have reported these insects being severely affected by the entomopathogenic fungus Metarhizium spp., comprehensive research in South Korea remains limited on this topic. In our two-year investigation, we investigated the infection rate and mortality of R. mikado caused by Metarhizium anisopliae. In 2022, specimens were collected from Cheonggyesan, and in 2023 from Geumamsan. Although no infections were confirmed in the specimens collected in June of both years. Beginning in July, mortality and infection rates were greatly increased. In conclusion, the summer monsoon appears to create hot and humid conditions in the forest, contributing to reduced survival rates for these insects due to infection by M. anisopliae.
나노유체 : 임계열유속 및 사고 저항성 증진을 위한 크로미아 나노유체 활용
손규민 ( Gyu Min Son ),서한 ( Han Seo ),문성보 ( Sung Bo Moon ),서석빈 ( Seok Bin Seo ),방인철 ( In Cheol Bang ) 한국액체미립화학회 2015 한국액체미립화학회 학술강연회 논문집 Vol.2015 No.-
Hydrogen explosion can threaten the safety of nuclear power plants as shown in Fukushima accident. When zircaloy (fuel cladding) is oxidized, it generates hydrogen and oxidation speeds up at high temperature. The concept of accident-tolerant-fuel (ATF) aims for enhanced safety response, mitigating oxidation of fuel claddings during accident and chrome coating on zircaloy surface shows promising results in this regard. By forming Cr2O3 (chromia or chrome oxide) layer on the outermost surface when oxidized, it prevents further oxidation inwards. However chrome coatings show some limitations since it forms hydrophobic surface and damages critical heat flux (CHF). Instead, direct coating of chromia layer is proposed in this study. Chromia coating on nichrome wire was done by boiling deposition of chromia nanofluid. Chrome coating with PVD was also prepared for comparison. Pool boiling experiment results show that chromia coated wire’s CHF is approximately twice of bare and chrome coated wires. For explanation of CHF enhancement, contact angle was compared showing chromia coating has hydrophilic surface. To ensure that direct coating of chromia has oxidation resistance, samples are oxidized in furnace and weight gain was compared.