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Chan Yeong Yu,Ezekiel Edward Nettey-Oppong,Elijah Effah,Su Min Han,김성완,최승호 한국잠사학회 2022 International Journal of Industrial Entomology Vol.45 No.2
Silk is a unique natural biopolymer with outstanding biocompatibility, high mechanical strength, and superior optical transparency. Due to its excellent properties, silk has been widely reported as an ideal biomaterial for several biomedical applications. Recently, fluorescent silk protein, a variant of native silk, has been reported as a biophotonic material with the potential for bioimaging and biosensing. Despite the realization of fluorescent silk, the traditional degumming process of fluorescence silk is crude and often results in fluorescence loss. The loss of fluorescent properties is attributed to the sensitivity of silk fibroin to temperature and solvent concentration during degumming. However, there is no comprehensive information on the influence of these processing parameters on fluorescence evolution and decay during fluorescent silk processing. Therefore, we conducted a spectroscopic study on fluorescence decay as a function of temperature, concentration, and duration for fluorescent silk cocoon degumming. Sodium carbonate solution was tested for degumming the fluorescent silk cocoons with different concentrations and temperatures; also, sodium carbonate solution is combined with Alcalase enzyme and triton x-100 to find optimal degumming conditions. Additionally, we conducted a molecular dynamics study to investigate the fundamental effect of temperature on the stability of the fluorescent protein. We observed degumming temperature as the prime source of fluorescent intensity reduction. From the MD study, fluorescence degradation originated from the thermal agitation of fluorescent protein Cα atoms and fluctuations of amino acid residues located in the chromophore region. Overall, degumming fluorescent silk with sodium carbonate and Alcalase enzyme solution at 25 °C preserved fluorescence.
구기자에서 큰이십팔점박이무당벌레(Henosepilachna vigintioctomaculata)의 온도조건에 따른 발육특성과 친환경제재에 의한 방제효과
강찬영(Chan-Yeong Kang),류태희(Tae-Hee Ryu),정유빈(Yu-Bin Jung),고나연(Na-Yeon Ko),권혜리(Hye-Ri Kwon),서미자(Mi-Ja Seo),유용만(Yong-Man Yu),윤영남(Young-Nam Youn),김영국(Yeong-Guk Kim) 충남대학교 농업과학연구소 2014 Korean Journal of Agricultural Science Vol.41 No.4
Host plants of the Henosepilachna vigintioctomaculata are known as Solanaceae plants such as potato, tomato, eggplant and Lycium chinense. Henosepilachna vigintioctomaculata (Motschulsky) cause continuous damage from early June to mid-August in leaves of L. chinense under environmental-friendly management in Cheongyang, Chungnam. The developmental period of egg and larva of H. vigintioctomaculata were investigated. H. vigintioctomaculata were reared on L. chinense at several temperatures, for example, 15, 20, 25 and 30°C in the laboratory. In addition, the control effect of 5 eco-friendly agricultural materials were examined. As results, hatching rate is the highest to 91% at 25°C. Egg periods were 10.8, 7.7, 5.1 and 3.7 days at each tested temperature, respectively. And the total developmental periods from egg to adult were 42.7, 26.3, 18.4 and 19.4 days at each tested temperature, respectively. Otherwise, their eclosion rates from pupa to adult were showed 58%, 77%, 85%, 65% at each tested temperature, respectively. As a result of the control effect, both adults and larvae of H. vigintioctomaculata were shown a high mortality to mixture with extract of Sophora flavescens, Chenopodium ambrosioides and Melia azedarach. Additional, larvae is shown high mortality to extract of Azadirachta indica and Cymbopogon nardus. Thus H. vigintioctomaculata might be controled by using plant extract of eco-friendly agricultural materials in due season.
구기자에서 큰이십팔점박이무당벌레(Henosepilachna vigintioctomaculata)의 온도조건에 따른 발육특성과 친환경제재에 의한 방제효과
강찬영(Chan-Yeong Kang),류태희(Tae-Hee Ryu),정유빈(Yu-Bin Jung),고나연(Na-Yeon Ko),권혜리(Hye-Ri Kwon),서미자(Mi-Ja Seo),유용만(Yong-Man Yu),윤영남(Young-Nam Youn),김영국(Yeong-Guk Kim) 충남대학교 농업과학연구소 2014 농업과학연구 Vol.41 No.4
Host plants of the Henosepilachna vigintioctomaculata are known as Solanaceae plants such as potato, tomato, eggplant and Lycium chinense. Henosepilachna vigintioctomaculata (Motschulsky) cause continuous damage from early June to mid-August in leaves of L. chinense under environmental-friendly management in Cheongyang, Chungnam. The developmental period of egg and larva of H. vigintioctomaculata were investigated. H. vigintioctomaculata were reared on L. chinense at several temperatures, for example, 15, 20, 25 and 30°C in the laboratory. In addition, the control effect of 5 eco-friendly agricultural materials were examined. As results, hatching rate is the highest to 91% at 25°C. Egg periods were 10.8, 7.7, 5.1 and 3.7 days at each tested temperature, respectively. And the total developmental periods from egg to adult were 42.7, 26.3, 18.4 and 19.4 days at each tested temperature, respectively. Otherwise, their eclosion rates from pupa to adult were showed 58%, 77%, 85%, 65% at each tested temperature, respectively. As a result of the control effect, both adults and larvae of H. vigintioctomaculata were shown a high mortality to mixture with extract of Sophora flavescens, Chenopodium ambrosioides and Melia azedarach. Additional, larvae is shown high mortality to extract of Azadirachta indica and Cymbopogon nardus. Thus H. vigintioctomaculata might be controled by using plant extract of eco-friendly agricultural materials in due season.
Temperature Change Analysis of Internal Channel and Outside Sensor for PCR Chips
Yeong-Hyeon Park,Chan-Young Park,Yu-Seop Kim,Hye-Jeong Song,Jong-Dae Kim 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.7
This paper presents the analysis of the steady state error and the time delay of the temperature of the chip sensor in a micro PCR chip and that of the reagent. The chambers with the various heights and sizes are compared in order to examine the differences in temperature and speed. A NTC-thermistor was employed as the chip sensor and the thermocouples were used to examine the temperature of the reagent in the chamber. From the result, we confirmed that the steady state error was negligible for all of constructions and the delay times showed no difference in the range of 60–72°C, while in the other ranges, the speed was higher for the lower height construction.
A Case of Acquired Hemochromatosis Due to Oral Iron Supplementation
( Chan Ran You ),( Yeong Ji Yu ),( Sang Wook Choi ) 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1
Aims: Hereditary hemochromatosis, a very rare genetic disorder in Korea, is characterized by increased iron accumulation in tissues and organs, resulting from a mutation in the HFE gene. Iron overload may also occur due to chronic transfusion or parenteral iron supplementation. We present a case of acquired hemochromatosis that developed hepatic iron overload after chronic oral iron supplementation. Results: A 53 years old woman was referred to our clinic due to elevated liver enzyme. Four years ago, she visited hematologic center for evaluation of cause of anemia. According to anemia study and bone marrow biopsy, the cause of anemia was determined to chronic inflammatory disease. She had been treated with nontuberculous mycobacteria infection in lung for a long time. Her pulmonology physician has supplied her oral iron during 3 years because her anemia did not recover. At the time of visit to our clinic, she had elevated liver enzyme (AST 110 IU/L, ALT 157 IU/L). Abdominal CT showed diffusely increased attenuation of liver on precontrast scan. Laboratory data revealed hemoglobin of 10.7 g/dL, serum iron of 242 μg/dL (40-162), serum TIBC of 249 μg/dL (246-396) and serum ferritin of > 1500 ng/mL (11-306.8). Transferrin saturation was 97.2%. Liver biopsy documented increased iron content in hepatocytes and Kupffer cells. She did not carry the mutation of HFE gene. The iron supplements were discontinued. We are going to treat her with iron chelator deferasirox. Conclusions: To avoid secondary hemochromatosis caused by iatrogenic measures, we have to monitor serum ferritin level and transferrin saturation during iron therapy.
A New Wrinkled Leaf Shape and Purple Leaf Color Vegetable Perilla Cultivar, "Neulbora"
Chan Sik Jung,Ki Won Oh,Myoung Hee Lee,Chung Berm Park,Suk Bok Pae,Kang Bo Sim,Yu Young Lee,Young Sup Ahn,Seung Ho Han,Hyoung Shick Kang,Byung Jun Jeong,Duck Yong Suh,Ho Yeong Kim 한국육종학회 2007 한국육종학회지 Vol.39 No.1
“Neulbora” is a new leaf vegetable perilla (Perilla frutescens (L.) Britton) variety developed from a cross between Ipdeulkkae1/YCPL173 and YCPL199 at the Yeongnam Agricultural Research Institute, NICS, RDA, in 2005. Wrinkled leaf shape and purple color o
Validation Study of an Operational Tolerance Signature in Korean Kidney Transplant Recipients
Yu Ho Lee,Jung-Woo Seo,Yang Gyun Kim,Ju-Young Moon,Jin Sug Kim,Kyung-Hwan Jeong,Bo-mi Kim,Kyoung Woon Kim,Chul Woo Yang,Chan-Duck Kim,Jae Berm Park,Yeong Hoon Kim,Byung Ha Chung,Sang-Ho Lee 대한면역학회 2018 Immune Network Vol.18 No.5