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최시경(Choi Si Kyong),손홍규(Sohn Hong Kyu),유수홍(You Su Hong),정재훈(Jung Jae Hoon) 대한공간정보학회 2009 한국지형공간정보학회 학술대회 Vol.2009 No.4
대부분이 지형이 산악 지형으로 되어있는 강원도지역은 여름철의 집중호우와 산사태 피해가 심각한 상황이다. 최근 주목받고 있는 인공위성을 이용한 원격탐측은 기존의 직접측량 방식보다 효율적으로 산사태를 감지할 수 있다. 특히 고해상도 영상레이다(SAR: Synthetic Aperture Radar)는 빛의 유ㆍ무나 기상상태에 제한 없이 탐측이 가능하다. 본 연구에서는 L-Band JERS-1 위성 영상을 이용한 DInSAR 방법을 적용하여 1998년 2월부터 8월까지의 강원도 지역의 시계열 지형변위를 관측하였다. 관측 결과 강우가 집중되는 5월에서 8월 사이의 지표변위가 컸고, 강원도 양양군 지역에서 지속적인 미세지형변위가 있어 산사태 발생의 위험이 큰 것으로 추정되었다.
Microalgae, Tetraselmis tetrathele has Alopecia Prevention and Scalp Improvement
( Si-hyang Park ),( Kyong-dong Lee ),( Ginnae Ahn ),( Hye-jin Park ),( Kap Seong Choi ),( Jiyeon Chun ),( Sun-yup Shim ) 한국미생물 · 생명공학회 2021 한국미생물·생명공학회지 Vol.49 No.4
The microalga, Tetrathelmis tetrathele, is used in the development of products for the aquaculture, food, and nutraceutical industries. In the present study, we investigated whether the T. tetrathele ethanolic extract (TTE), which has anti-inflammatory properties, can confer protection against alopecia and improve scalp health, influence the proliferation of human keratinocytes, HaCaT cells, and human hair follicle dermal papilla cells (HFDPC), or inhibit 5α-reductase activity. We found that TTE inhibited the production of the inflammatory mediator, nitric oxide (NO), and prostaglandin E<sub>2</sub> (PGE<sub>2</sub>) without cytotoxicity in LPS-stimulated RAW 264.7 cells. In addition, TTE encouraged the proliferation of HaCaT cells and HFDPC. Our results showed that TTE had anti-inflammatory activities, proliferated HaCaT cells and HFDPC, and inhibited 5α-reductase activity. Therefore, we suggest that T. tetrathele could be a potent therapeutic agent for alopecia prevention and scalp improvement.
박시홍(Si Hong Park),이경화(Kyong Hwa Lee),최인열(In Yol Choi),윤병철(Byong Chul Yoon),김중근(Jung Keun Kim) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.11
Fetal teratomas rarely complicate pregnancy,having an incidance of only 20,000:1 to 40,000:1 of live births. Overthere, cervical teratomas are rare and accounts for only 5.5% of all neonatal teratomas. We have experienced a large cervical immature teratoma and present this case with a brief review of literatures.
과열증기처리가 압출 쌀스낵의 이화학적 특성에 미치는 영향
이시연 ( Si Yeon Lee ),고범수 ( Bum Soo Ko ),박준규 ( Jun Kyu Park ),최은희 ( Eun Hee Choi ),이미연 ( Mi Yeon Lee ),유영미 ( Young Mi Yoo ),조은경 ( Eun Kyong Jo ),이재권 ( Jae Kwon Lee ) 한국산업식품공학회 2015 산업 식품공학 Vol.19 No.3
과열증기처리한 백미로 제조한 압출스낵의 물리화학적 특성과 미세구조를 조사하여 과열증기처리 및 과열증기온도(200, 250, 350oC)가 압출스낵의 품질특성에 미치는 영향을 검토하였다. 압출스낵의 이화학적 특성 측정결과, 팽화도는 과열증기처리에 따라 증가하였으나 과열증기온도의 영향은 미미하였다. 압출스낵의 경도는 과열증기처리에 따라, 과열증기온도가 높을수록 감소하였다. 손상전분함량은 과열증기처리에 따라 78.1%에서 80-81%로 다소 증가하였으나 과열증기온도에 따른 손상전분함량의 유의 차는 없었으며, 이로써 과열증기처리가 전분호화에 미치는 영향은 크지 않은 것을 확인하였다. 과열증기처리에 따라 수분흡수지수(WAI)는 유사한 측정치를 나타낸 반면 수분용해지수(WSI)는 비교적 크게 증가하여 과열증기처리가 압출공정에서 전분분자의 저분자화를 증가시키는 것으로 판단되었다. 압출스낵의 수분흡수율은 과열증기처리에 따라 증가하였으며 과열증기온도가 높을수록 수분흡수율은 증가하였다. 압출스낵의 미세구조 관측결과, 압출스낵 내부의 기공크기와 기공 막 두께는 과열증기처리에 따라 감소하며, 이와 같은 내부구조 변화로 인하여 과열증기처리 압출스낵의 팽화도, 경도 및 수분흡수율 측정결과는 대조구와 상이하였다. 한편 과열증기처리에 따른 압출스낵의 미세구조 변화는 과열증기처리가 쌀의 배유조직 내에 미세한 균열(stress crack)을 발생하고, 미세 균열 내의 공기가 압출과정에 유입되어 보다 많은 핵심이 생성되며, 이로 인하여 다 공성이 높아지는 것으로 추정된다. This study was carried out to examine the effect of superheated steam (SHS) treatment combined with extrusion process on the physicochemical properties of extruded rice snack. Milled rice grains were heated for 2 min using the SHS at 200℃, 250℃, and 350℃, then processed into extruded rice snacks using a single screw extruder. Bulk density, hardness, water solubility index (WSI), and water uptake capacity of extruded rice snack were significantly influenced by the SHS treatment and temperature of SHS. Increasing SHS temperature resulted in extruded rice snack with a higher expansion, WSI, and water uptake capacity than those of the control snack. Meanwhile, hardness decreased greatly with increasing SHS temperature. The microstructure of extruded rice snack revealed that the sizes and thickness of air cells and air cell walls decreased after SHS treatment with increasing SHS temperature, resulting in better expansion and softer texture. Presumably, the influence of SHS treatment on structural changes was attributed to the increased number of micro-bubbles nucleated in the starch melt during the extrusion process.
국내육성 팝콘옥수수 팝핑부피 향상을 위한 적정 수확시기
최재근 ( Jae-keun Choi ),류시환 ( Si-hwan Ryu ),김희연 ( Hee Yeon Kim ),김문종 ( Moon-jong Kim ),한정헌 ( Jeong-heon Han ),왕승현 ( Seung Hyun Wang ),김기선 ( Ki Sun Kim ),사규진 ( Kyu Jin Sa ),이주경 ( Ju Kyong Lee ) 강원대학교 농업생명과학연구원 2022 강원 농업생명환경연구 Vol.34 No.0
국내육성 팝콘옥수수 팝핑율 향상을 위하여 ‘오륜팝콘’, ‘오륜2호’, ‘지팝콘’, ‘기찬팝콘’에 대해 출사 후 수확시기별 팝핑율을 비교하였다. 국내육성 팝콘옥수수의 생육특성은 출사일수는 78-81일 사이로 나타났으며, 착수고율은 53.4-64%로 다소 높게 나타났다. 출사 후 등숙 기간에 따른 이삭특성은 등숙 기간이 길수록 이삭장은 짧아지고 백립중은 증가하였다. 팝핑부피는 ‘오륜팝콘’과 ‘오륜2호’ 품종에서는 출사 후 40일 후 측정에서는 각각 29.8 ± 0.2 cm<sup>3</sup>/g, 30.4 ± 0.1 cm<sup>3</sup>/g로 낮게 나타났으나 70일 후 수확에서는 34.8 cm<sup>3</sup>/g, 35.8 ± 0.1 cm<sup>3</sup>/g로 높게 나타나 두 품종의 수확 적기는 출사 후 70일로 나타났다. ‘지팝콘’과 ‘기찬팝콘’은 출사 후 40일 28.6 cm<sup>3</sup>/g, 34.3 ± 0.1 cm<sup>3</sup>/g로 나타났으나 60일 후 팝콘부피가 35.2 ± 0.1 cm<sup>3</sup>/g, 35.9 ± 0.1 cm<sup>3</sup>/g 증가하여 최적 수확기는 출사 후 60일로 나타났다. 수확기에 따른 일반성분 분석에서는 등숙 기간이 길수록 수분함량이 감소하였으며, 탄수화물, 단백질 함량은 증가하였다. 조지방 함량은 3.0 g/100 g대로 나타났다. 따라서, 국내육성 팝콘옥수수의 수확시기는 출사 후 60-70일이 적정하며 팝콘의 팝핑부피 품질을 높일 수 있는 최적 수확시기라고 판단된다. In this study, we investigated the effects of harvest time on the popping volumes of “Oryun popcorn,” “Oryun #2,” “G popcorn,” and “Kichan Popcorn” to improve the popping quality of domestic maize. The silking days of the four popcorn maize varieties ranged from 78-81 d and their plant-ear height ratio was 53.4-64%, which is rather high. The ear lengths were shorter and the grain weights were greater at 70 days after silking (DAS) than at 40 DAS. For the “Oryun Popcorn” and “Oryun #2” varieties, the popping volumes measured at 40 DAS were 29.8 ± 0.2 cm<sup>3</sup>/g and 30.4 ± 0.1 cm<sup>3</sup>/g, respectively, and at 70 DAS were 34.8 ± 0.0 cm3/g and 35.8 ± 0.1 cm<sup>3</sup>/g, respectively. The ideal harvest time for both varieties was 70 DAS. The popping volumes of “G Popcorn” and “Kichan popcorn” varieties evaluated at 40 DAS was 28.6 cm<sup>3</sup>/g and 34.3 ± 0.1 cm<sup>3</sup>/g, respectively. The optimal harvest time for these varieties was 60 DAS, when their popping volumes were 35.2 ± 01 cm3/g and 35.9 ± 0.1 cm<sup>3</sup>/g, respectively. Analysis of the general composition of the harvest showed that the longer the ripening period, the lower the moisture content and the higher the carbohydrate and protein content. The crude fat content was less than 3.0 g/100 g. Therefore, the optimal harvest time for domestically grown popcorn maize that maximizes the popping volume for improved popcorn quality was 60-70 DAS.
임신초기 약물노출 후 임신결과; 10년간의 경험 -생식 발생 독성 정보 활용화 방안 연구-
최준식 ( June Seek Choi ),한정열 ( Jung Yeol Han ),안현경 ( Hyun Kyong Ahn ),이시원 ( Si Won Lee ),김민형 ( Min Hyoung Kim ),정진훈 ( Jin Hoon Chung ),류현미 ( Hyun Mee Ryu ),김문영 ( Moon Young Kim ),양재혁 ( Jae Hyug Yang ),최 대한주산의학회 2010 Perinatology Vol.21 No.1
Purpose: In Korea, pregnancy termination is frequently reported among women who took medications for an acute or chronic disease during pregnancy, for fear of teratogenic risk. We have previously shown that a service providing evidence-based information is helpful for women who week counseling to make a rational decision regarding their pregnancies. This study aimed to evaluate whether termination of pregnancy based on such perceptions, is justified using the `DRug Exposure and risk Assessment in Moms` (DREAM) registry. Methods: The study included 5,032 consenting pregnant women from the clinic and call center at the Korean Motherisk Program, from November 1999 to October 2008. The DREAM registry recorded the pregnancy outcomes (preterm birth, low birth weight, intrauterine fetal death, and congenital anomaly) of 3,328 women. Results: Among women exposed to medications, time of exposure ranged from 3.5-4.6 weeks of gestation. There were 1,308 different drugs prescribed to these women. The drug most frequently prescribed was acetaminophen followed by chlorpheniramine maleate, and pseudoephedrine. There were 4.7% (n=156/3,328) women who underwent a voluntary abortion for fear of birth defects. We compared frequency of birth defects between exposed women and unexposed pregnant women in our institution during gestation. The frequency of major congenital malformations was 2.5% (n=74/2,977) in exposed group and 2.9% (n=75/2,573) in unexposed group (P=0.32). There was no statistically significant difference between exposed and control group in the rate of preterm births, intrauterine fetal death and low-birth weight babies. Conclusion: We did not observe increased risk of congenital malformations and adverse pregnancy outcomes in a population of pregnant women exposed to a variety of medications. Therefore these medications are not considered teratogen.