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Sea Hyun Kim,Young Seok Jang,Jin Gyu Han,Hee Won Seo,In Hyeop Park,Kye Joong Cho 한국육종학회 2007 한국육종학회지 Vol.39 No.2
This study was conducted to clarify the relation of the species of genus Sorbus in Korea based on multivariate analysis for the morphological characteristics and DNA polymorphism. Twenty-eight quantitative characters were assessed and analyzed by the principal component analysis and UPGMA cluster analysis. From the principal component analysis of 28 quantitative characters, three principal components (PC’s) explained the variation of inter-specific relations among the genus Sorbus. The first PC’s explained 58.95% of the variation with the Eigenvalue of 16.5, and the second and third PC’s showed the Eigenvalue of 8.3 and 3.1 and explained 88.74% and 100.0% of the variation, respectively. Especially, the first PC’s was related in order of the fruit width (FW) and length of terminal leaflet (LTL), petal length (PL), width of terminal leaflet (WTL), and diameter of winter bud (DWB). The second and third PC’s were involved in order of the No. of leaflet (NL), No. of fruit per fruiting lateral (NFL), length of upper rachis (LUR), and diameter of rachis (DR), No. of pistil (NP), respectively. Cluster analysis using them UPGMA method based on the principal components of four species of the genus Sorbus divided into two groups. Group Ⅰ comprises Sorbus commixta and S. sambucifolia var. pseudogracilis, and Group Ⅱ consists of S. amurensis and S. aucuparia. The pattern of DNA polymorphism of the 56 inter-simple sequence repeat (ISSR) markers revealed that different taxa shared different sets of bands, and DNA analysis is useful for taxonomic study on the genus Sorbus.
A New High Yield Hovenia dulcis var. koreana Nakai Cultivar, "Poong-Sung 1"
Sea Hyun Kim,Hun Gwan Chung,Jin Gyu Han 한국육종학회 2007 한국육종학회지 Vol.39 No.3
Hovenia dulcis var. koreana Nakai is recently known to be a useful tree because of their medicinal function. In 1996, candidate trees were selected from 10 regions in Korea, and a clone bank was established in 1998 by grafted 70 candidate clones of candidate trees in order to breed high-yield superior trees. From 2003 to 2005, five clones were selected and screened by analyzing flowering and fruiting characteristics of 47 clones in the clone bank. “Poong-Sung 1”, a new high-yield superior H. dulcis var. koreana Nakai cultivar was finally selected from the 5 clones. The final selection focused on fruiting characteristics such as the number of fructify lateral (NFL), the number of average bunch per one fructify lateral (NABFL), the number of average bunch per fruiting lateral (NABPFL), the weight of fruit petiole per individual (WFPI) and the yield of individual (YI). Fruit petiole of “Poong-Sung 1” has dark brown skin color and fruit flesh color. Fruiting characteristics of “Poong-Sung 1” showed large better results and selection effects with an average of 19.3Ea (NFL), 4.75Ea (NABFL), 91.68Ea (NABPFL), 4.7 kg (WFPI) and 11.26 kg (YI) which are 158.8%, 147.1%, 233.9%, 401.7% and 412.5% superior compared to the mean of 47 clones, respectively.
Mouthguard use in Korean Taekwondo athletes - awareness and attitude
Sea-Joong Kim,Gyu-Tae Kim,Deok-Won Lee,Chong-Kwan Heo,Jung-Woo Lee 대한치과보철학회 2013 The Journal of Advanced Prosthodontics Vol.5 No.2
PURPOSE A survey was performed to identify the level of mouthguard use, awareness, wearability issues and attitude toward mouthguard among elite Korean Taewondo athletes. MATERIALS AND METHODS Survey questionnaires were given to 152 athletes participating in the Korea National Taekwondo team selection event for the 2010 Guangzhou Asian Games. Questionnaires consisted of three sections, mouthguard awareness, reasons for not wearing mouthguard and the last section to test the level of acceptance on current mouthguard and when the identified problems were resolved. For analyzing difference among response, χ2 test was used and significant level (α) was set up as 0.05. RESULTS Responses in each of items showed significant difference (P<.001). Majority of response regarding each question: Majority of respondents believed that mouthguard were effective in preventing injuries (36.4%) but the result suggested that the provision of information on mouthguard to athletes was inadequate (44.0%) and the result showed that respondents were not greatly interested or concerned in relation to the mandatory mouthguard rule (31.6%). Although the responses on the level of comfort and wearability of mouthguard were negative (34.8%), athletes were positively willing to wear mouthguard if the problems rectified (51.2%). CONCLUSION Considering the high level of willingness to wear mouthguard if the problems rectified, it is thought that together with efforts in providing more mouthguard information, the work of sports dentistry to research and improve mouthguard will be invaluable in promoting mouthguard to more athletes.
Sea Kwan Oh,Pil Seong Hwang,Choon-Ki Lee,Yeon-Gyu Kim,Woo Duck Seo,Kye Man Cho,Myoung-Gun Choung,Jin Hwan Lee 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.5
The aim of this study investigated the fluctuations of 3 characters from 3 ecotypes [early ripening (ER), middle ripening (MR), and late ripening (LR)] of 20 Korean brown rice cultivars in different storage systems [time: 12 and 24 weeks, temperature: low (10℃) and room (25℃)]. With increase of storage time and temperature, lipoxygenase activity, and fat acidity increased, whereas germination rate was reduced. ER cultivars exhibited the highest lipoxygenase activity of 35.49±2.46 unit/㎎ protein during 24 weeks storage at 25℃, followed by LR (32.73±1.33) and MR (32.66±1.62) cultivars. The amounts of fat acidity also were observed by the same order (ER: 20.40±2.12>LR: 19.68±1.86>MR: 19.64±1.35 ㎎ KOH/100 g). Germination rate slightly decreased with increase of time and temperature (MR>LR>ER), but MR and LR cultivars showed the most significant changes (ER: 60.90±23.47%, MR: 32.66±13.95%, and LR: 32.53±5.87%). On the basis of above results, MR cultivars were evaluated the highest quality, because high lipoxygenase activity, high fat acidity, and low germination rate have deteriorated in quality and generated off-odor. Thus, MR cultivars might be very important sources in food processing and stored dietary supplement aspects.
( Sea Byul Kang ),( Kyu Sung Choi ),( Hyun Hee Lee ),( Gyu-seong Han ) 한국목재공학회 2018 목재공학 Vol.46 No.5
산림청은 보조금 지원사업을 통해 2011년부터 2015년까지 76대의 산업용 목재펠릿보일러를 보급하였다. 보일러의 연소 시 발생하는 일산화탄소(CO) 및 질소산화물(NO<sub>x</sub>)는 각각 급성 중독 시 사망에까지 이르게 하는 물질이기 때문에 배출량을 줄이는 것이 매우 중요하다. 따라서 이들 보일러 중 열풍기와 초기에 보급된 일부 보일러를 제외한 63대의 보일러에서 배출된 CO 및 NO<sub>x</sub> 계측값을 분석하였다. 또한 측정된 배출가스 농도(배기가스 O<sub>2</sub> 농도 12% 기준)로부터 배출계수를 산출하였다. 산업용 목재펠릿보일러에서 배출된 CO의 평균값은 49 ppm이었으며, 해를 거듭함에 따라 CO의 농도가 줄어들고 있음이 확인되었다. 이때 CO의 배출계수는 0.73 g/kg였다. 산업용 목재펠릿보일러에서 배출된 NO<sub>x</sub>의 평균값은 67 ppm였으며, NO<sub>x</sub>의 배출계수는 1.63 g/kg이었다. CO와는 달리 설치년도에 따라 감소하는 경향은 나타나지 않았다. CO 및 NO<sub>x</sub> 계측값은 모두 환경부의 허용기준을 만족하였다. 이러한 NO<sub>x</sub> 배출계수를 저NO<sub>x</sub> 인증된 연소기에서 생성되는 NO<sub>x</sub> 배출계수와 비교하였다. 산업용 목재펠릿보일러의 NO<sub>x</sub> 배출계수는 저NO<sub>x</sub> 인증된 LNG 연소기의 NO<sub>x</sub> 배출계수에 비해 약 1.9배, 석탄 연소에 비해 약 0.92배였다. Korea Forest Service has supplied 76 industrial wood pellet boilers from 2011 to 2015 through subsidy programs. Since carbon monoxide (CO) and nitrogen oxides (NO<sub>x</sub>) generated during boiler combustion are substances that lead to death in the case of acute poisoning, it is very important to reduce emissions. Therefore, the CO and NO<sub>x</sub> emission values of 63 boilers excluding the hot air blower and some boilers initially supplied were analyzed. The emission factor was also calculated from the measured exhaust gas concentration (based on exhaust gas O<sub>2</sub> concentration of 12%). The average value of CO emitted from industrial wood pellet boilers was 49 ppm and it was confirmed that the CO concentration was decreasing as the years passed. The emission factor of CO was 0.73 g/kg. The average value of NO<sub>x</sub> emitted from industrial wood pellet boilers was 67 ppm and the emission factor of NO<sub>x</sub> was 1.63 g/kg. Unlike CO, there was no tendency to decrease according to the installation year. Both CO and NO<sub>x</sub> measurements met the limits of the Ministry of Environment. These NO<sub>x</sub> emission factors were compared with the NO<sub>x</sub> emission factors produced by certified low NO<sub>x</sub> burners. The NO<sub>x</sub> emission factor of industrial wood pellet boilers was about 1.9 times that of certified low NO<sub>x</sub> LNG combustors and about 0.92 times that of coal combustion.