현행 지구과학 Ⅰ 교과서의 내용분석 : 천문분야를 중심으로

姜用熙,具本佑 경북대학교 과학교육연구소 1985 科學敎育硏究誌 Vol.9 No.-

We have analysed astronomical contents described in 4 kinds of Earth Science-Ⅰ textbooks currently used in high schools of Korea. Astronomical terminologies which have two or more Korean synonyms are investigated. We suggest to improve or correct synonyms used in different kind of Earth Science textbooks to avoid confusion and/or misconception. Appropriate sets of astronomical expriments and inquiry activities are chosen by considering laboratory circumstances in high schools.

단섬유 인장시험을 이용한 상용 탄소섬유의 기계적 물성

조한익 ( Han Ik Joh ),송해경 ( Hae Kyung Song ),김기영 ( Ki Young Kim ),구본철 ( Bon Cheol Ku1 ),강필현 ( Phil Hyun Kang ),이성호 ( Sung Ho Lee ) 대한금속재료학회(구 대한금속학회) 2013 대한금속·재료학회지 Vol.51 No.12

Abstract: In this study, mechanical properties of commercial carbon fibers were evaluated using a single filament tensile test with various fiber gauge lengths. Tensile strength increased significantly with a decreasing length of the test specimens possibly due to small defect sites. The compliance method provided more accurate moduli of the carbon fibers, removing system errors during the single filament tensile test. The Weibull modulus revealed that shorter specimens had an inhomogeneous defect distribution, leading to a higher tensile strength and its standard deviation. X-ray diffractograms of carbon fibers showed a similar crystallinity and orientation in spite of significant differences in the fiber modulus and strength, indicating that crystalline structure of the commercial carbon fibers used in the study was not attributable to the difference in their tensile properties.

The Effects of Transplanting Time and Meteorological Change to Variation of Phyllochron of Rice

Bon-Il Ku,Min-Kyu Choi,Shin-Ku Kang,Kyung-Bo Lee,Hong-Kyu Park,Tae-Seon Park,Jae-Kwon Ko,Byun-woo Lee 韓國作物學會 2010 한국작물학회지 Vol.55 No.3

This study was performed at Rice and Winter Cereal Crops Department of NICS during 2007 and 2008 to investigate the characteristics of rice leaf emergence and to obtain basic data which can be used for rice growth simulation model by which we can forecast rice growth stage and heading date accurately under different cultivars, transplanting date, and climatic conditions. To confirm leaf emergence rate according to rice maturing ecotype, we surveyed the leaf emergence rate and heading date of Unkwangbyeo, Hwayoungbyeo and Nampyeongbyeo which are early maturing, medium maturing and medium-late maturing cultivars, respectively, according to seedling raising duration and transplanting time. When seedling duration was 15 days, the growth duration between transplanting time and completion of flag leaf emergence on main culm were 51.5~78.3 days in Unkwangbyeo, 55.3~87.9 days in Hwayoungbyeo and 58.4~98.4 days in Nampyeongbyeo, respectively. When seedling duration was 30 days, they were 50.1~75.5 days in Unkwangbyeo, 52.4~84.7 days in Hwayoungbyeo and 56.4~93.8 days in Nampyeongbyeo, respectively. As transplanting time delayed, the emerged leaf number after transplanting decreased in all rice cultivars. The cumulative temperature between transplanting time to completion of flag leaf elongation on main culm were 1,281~circC~1,650~circC in Unkwangbyeo, 1,344~circC~1,891~circC in Hwayoungbyeo and 1,454~circC~2,173~circC in Nampyeongbyeo, respectively. Leaf emergence rate on main culm were precisely represented by equation, y = y0 + a / [1 + exp( - (x - x0 ) / b)]c, when we used daily mean temperature as variable.

The Effects of Transplanting Time and Meteorological Change to Variation of Phyllochron of Rice

Ku, Bon-Il,Choi, Min-Kyu,Kang, Shin-Ku,Lee, Kyung-Bo,Park, Hong-Kyu,Park, Tae-Seon,Ko, Jae-Kwon,Lee, Byun-Woo The Korean Society of Crop Science 2010 Korean journal of crop science Vol.55 No.3

This study was performed at Rice and Winter Cereal Crops Department of NICS during 2007 and 2008 to investigate the characteristics of rice leaf emergence and to obtain basic data which can be used for rice growth simulation model by which we can forecast rice growth stage and heading date accurately under different cultivars, transplanting date, and climatic conditions. To confirm leaf emergence rate according to rice maturing ecotype, we surveyed the leaf emergence rate and heading date of Unkwangbyeo, Hwayoungbyeo and Nampyeongbyeo which are early maturing, medium maturing and medium-late maturing cultivars, respectively, according to seedling raising duration and transplanting time. When seedling duration was 15 days, the growth duration between transplanting time and completion of flag leaf emergence on main culm were 51.5~78.3 days in Unkwangbyeo, 55.3~87.9 days in Hwayoungbyeo and 58.4~98.4 days in Nampyeongbyeo, respectively. When seedling duration was 30 days, they were 50.1~75.5 days in Unkwangbyeo, 52.4~84.7 days in Hwayoungbyeo and 56.4~93.8 days in Nampyeongbyeo, respectively. As transplanting time delayed, the emerged leaf number after transplanting decreased in all rice cultivars. The cumulative temperature between transplanting time to completion of flag leaf elongation on main culm were $1,281^{\circ}C{\sim}1,650^{\circ}C$ in Unkwangbyeo, $1,344^{\circ}C{\sim}1,891^{\circ}C$ in Hwayoungbyeo and $1,454^{\circ}C{\sim}2,173^{\circ}C$ in Nampyeongbyeo, respectively. Leaf emergence rate on main culm were precisely represented by equation, y = $y_0$ + a / [1 + exp( - (x - $x_0$) / b)]^c, when we used daily mean temperature as variable.

기후변화에 대비한 한국에서 벼 2기작 재배에 관한 연구

구본일 ( Bon Il Ku ),강신구 ( Shin Ku Kang ),상완규 ( Wan Gyu Sang ),이민희,박홍규 ( Hong Kyu Park ),김영두 ( Young Doo Kim ),이점호 ( Jeom Ho Lee ) 전북대학교 농업과학기술연구소 2014 농업생명과학연구 Vol.45 No.1

본 연구는 기후온난화에 따른 벼 생육환경 변화를 조사하고, 우리나라 지역 및 벼 품종별 재배기간 변화를 비교하여 우리나라에서 벼 2기작재배의 가능성 정도를 진단하고자 하였다. 이앙시기에 따른 생존율은 이앙된 벼가 0°C 이하의 저온을 경과하면 생존율이 급격하게 저하되지만, 야간 저온이 0°C를 벗어나는 시기부터 이앙이 가능할 것으로 판단된다. 전기작 재배에서 관행 육묘상자로 육묘후 이앙한 것에 비해 폿트상자의 크기를 증대하여 벼 이앙시 생육단계를 달리한 경우 1~2일의 추가적인 생육일수 단축효과가 있었다. 벼 품종별 출수기는 진부올벼가 7월 4일로 가장 빨랐고 둔내 벼와는 2~3일의 출수기 차이가 있었다. 저온피해가 발생하지 않는다면 진부올벼의 가장 빠른 출수기는 6월 30일 또는 7월 1일경일 것으로 추정된다. 따라서 관행 벼 육묘상자로 육묘시 6월 말 또는 7월 초에 출수하여 8월 5일경 수확하고 8월 10일 이전에 이앙하는 벼 2기작이 가능하나 8월10일경에 후기작을 이앙하면 등숙기 저온으로 벼 수량이 크게 감소하였다. 후기작 이앙시기에 7월 10일 이앙한 경우 8월 하순에 출수가 가능했고 이앙시기가 늦어지면서 점차 출수도 늦어져 7월 30일 이앙에서는 품종에 따라 9월 7일~9월 14일에 출수하였고, 8월 10일 이앙에서는 온도가 낮아지면서 출수가 더 늦어져 대부분 9월 20일 이후에 출수하였다. 7월 30일 이앙한 경우 출수후 최저온도 0°C 출현일까지 최저 853°C가 확보되어 등숙이 양호하게 이루어졌으나, 8월 10일 이앙한 경우에는 온도가 저하되면서 출수가 늦게 이루어져 대부분의 품종에서 800°C 이하에서 등숙이 종료되어 수량이 크게 감소하였다. 후기작 이앙에서 출수기는 9월 중순 전후이므로 이 시기 이후 적산온도가 많이 확보되는 지역은 벼 2기작 재배가 가능하다고 추정할 수 있다. 9월 10일에 출수해서 등숙이 가능한 지역은 제주지역, 전남, 경남 평야지 및 정읍 전주 등의 전북지역 평야지도 후기작에 적합한 품종을 선정하면 벼 2기작 재배가 가능하리라 생각되며, 이러한 지역에서는 벼 2기작 재배만이 아니라 토지생산성 및 수량을 극대화하기 위해 다양한 작물과의 작부체계 구성을 위해 좀 더 자세한 검토가 이루어져야 할 것으로 보인다. This study was carried out to evaluate the possibility of rice double cropping in Korea by assessing the growth and yield performance of rice cultivars transplanted at the extremely early and late dates. When transplanted rice confront with low temperature below 0℃, the survival rate decreased drastically, so we can judge that earliest transplanting was possible when low temperature escape from 0℃. Heading date, July 4, of Jinbuolbyeo was faster 2~3 days than those of Dunaebyeo. If rice has not get cold damage, the earliest heading date of Jinbujolbyeo can advance to June 30 or July 1. Therefore, it can be possible to harvest on August 5 after heading on later June or early July, and to transplant on August 10. But if transplanting delayed until August 10, the yield of second rice cropping decreased drastically owing to low temperature during ripening stage. In second rice cropping from late July to early August, ripening were relatively good until transplanting on August 5. So we can judge transplanting of second rice cropping should be performed before this season. In transplanting on July 30, cumulative temperature between heading and first frosting was 853°C and ripening was in appropriate level, but in transplanting on August 10, heading was delayed by low temperature, so ripening was finished below 800℃ and rice yield decreased drastically. For appropriate ripening and rice yield, it is necessary that cumulative temperature of ripening duration between heading and first frosting is over 800°C. In transplanting of second cropping, the heading time were located in middle 10 days of September, so we can presume that rice double cropping is possible in regions which have more ripening temperature over 800℃ from middle 10 days of September. The regions in which ripening is possible in heading on September 10 were Jeju island, plain area of Jeonnam and Kyungnam province and some plain area of Jeonbuk province. In this region, we should review comprehensively the possibility of rice double cropping and other cropping system with another crops to increase income and productivity of land.

벼 품종간 엽 생장속도 차이가 생육 및 수량에 미치는 영향

구본일 ( Bon Il Ku ),강신구 ( Shin Ku Kang ),상완규 ( Wan Gyu Sang ),이민희,박홍규 ( Hong Kyu Park ),김영두 ( Young Doo Kim ),이점호 ( Jeom Ho Lee ) 전북대학교 농업과학기술연구소 2014 농업생명과학연구 Vol.45 No.1

본 연구는 이앙시기 변동에 따른 벼 품종들의 출엽특성을 비교하고자 국립식량과학원 벼맥류부 벼시험포장에서 수행되었다. 국내에서 육성되어 재배되는 벼 품종들을 대상으로 출수기까지 벼 출엽속도를 비교해 본 결과 출수기가 늦어질수록 출엽수가 증가하는 경향을 보였다. 그러나 같은 이앙시기에서 동일한 출수를 보여도 벼 품종간 출엽속도의 차이를 보였다. 조생종에서 출수기가 비슷했던 진부벼에 비해 운봉벼는 동일 시기에 1.2엽이 더 전개되었고 중생종에서 광안벼나 화영벼는 간척벼에 비해 각각 1.6엽, 1.4엽이 더 전개되어 품종간 출엽속도의 차이를 보였다. 이앙시기가 늦어짐에 따라 주간에서 전개되는 엽수는 줄어드는 경향이었으나 품종에 따라 증가하는 경우도 있어 일정한 비율로 출엽수가 감소한다고 추정하기는 어려웠다. 다른 품종에 비해 출엽수가 증가하는 경우 출수기 건물중도 높은 경향을 보였으나, 이것은 출엽이 빠른 품종이 생육량을 증대시킨 것에 비해 생육기간 연장에 의해 더 많은 기간 식물체가 영양생장을 하였기 때문으로 판단된다. 5월 16일 이앙하여 7월 20일 전후에 출수한 조생종은 출수후 40일간 평균기온이 약 26℃에서 등숙하였고 6월 15일 이앙에서는 24℃보다 다소 높은 온도에서 등숙하였다. 따라서 출수가 빨랐던 5월 16일 이앙에서는 운봉, 남원, 진부는 수량이 크게 감소한 반면 운광벼는 고온등숙 조건에서도 높은 수량을 나타냈다. 중만생종 벼 품종의 경우 6월 15일 이앙에서 8월 하순에 출수하여 등숙하였는데, 6월 1일과 6월 15일 이앙시 수량을 비교하면 대청벼는 크게 감소했으나 일미벼나 남평벼는 상대적으로 높은 수량을 보여 늦은 출수에 의한 저온 등숙조건에서도 수량성이 양호한 특성을 보였다. This experiment was conducted to compare emergence rate on main culm leaf among cultivars having similar heading date and to evaluate the effects of leaf emergence rate on growth and yield of rice. During 2009~2011, five early maturing rice cultivars(Unbong, Namweon, Jinbu, Unkwang and Sangju), four middle maturing rice cultivars(Seojin, Ganckeok, Hwayeong and Kwangan) and four middle-late maturing rice cultivars(Daecheong, Ilpum, Ilmi and Nampyeong) were transplanted at three different dates from May 16 to June 15 in Iksan region. Number of leaf emerged on main culm increased as heading date delayed, but some rice cultivars having similar heading date showed noticeable difference in emerged leaf number. In transplanting on May 16, the early maturing cultivar, Jinbu, had 1.2 leaf more than Unbong which had similar heading date. Similarly middle maturing cultivar, Kwangan, had 1.6 and 1.4 more emerged leaf than Hwayoung and Gancheok, respectively. As transplanting date delayed, leaf number emerged on main culm decreased in general dates, but some cultivars get increased leaf number in late transplanting dates. Consequently, it was difficult to get a constant rate in leaf number corrected with transplanting date. Cultivars having more emerged leaf number generally had increased dry weight at heading stage, and it is postulated that the increase in dry weight was more contributed by prolonged growth duration than by leaf emergence rate. In transplanting on May 16, early maturing cultivars, Unbong, Namweon and Jinbu showed significant yield decrease compared to yield in transplanting on June 15 because of high temperature during ripening stage, but Unkwang showed least reduction in yield. In transplanting on June 15, middle-late maturing cultivars, yield of Daecheong showed significantly reduced compared to that in transplanting on June 1 because of low temperature during ripening stage, but Ilmi and Nampyeong showed slight reduction in yield.

벼 2기작 재배를 위한 조기재배 환경에서 벼 생육 및 수량변화

구본일 ( Bon Il Ku ),최민규 ( Min Kyu Choi ),강신구 ( Shin Ku Kang ),박태선 ( Tae Seon Park ),김영두 ( Young Doo Kim ),박홍규 ( Hong Kyu Park ),고재권 ( Jae Kwon Ko ),이변우 ( Byun Woo Lee ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.5

This study was carried out to evaluate the possibility of rice double cropping in Korea by assessing the growth and yield performance of rice cultivars transplanted at the extremely-early date. When the transplanted rice seedling was exposed to low temperature below 0oC, the survival rate decreased drastically. However, short exposure to below 0oC one or two times did not damage transplanted rice seedling so severely. Thus, the earliest transplanting in spring would be possible when minimum temperature rises above 0oC. Compared with the conventional seedling nursery tray (CSNT), seedling rearing with the potted nursery tray was more effective for increasing leaf age and seedling dry weight during nursery period. In the first rice cropping, rice cultivation with seedlings reared in PSNT showed shorter growth duration and cumulative temperature from transplanting to heading than that with seedlings reared in CSNT. The earliest heading date on July 4 in Jinbuolbyeo was earlier by two to three days than that of Dunaebyeo. If rice has not exposed to cold damage, the earliest heading date of Jinbujolbyeo can advance to June 30 or July 1. In this case, rice harvest would be possible on August 5, enabling the rice transplanting of the second rice cropping before August 10. At transplanting time with low temperature damage rice yield were less than 400 kg/10a while rice yield exceeded 400 kg/10a at transplanting time without low temperature damage.

犀角 Rhinocerotis Cornu이 家兎血淸中 Cholesterol Triglyceride 含量變化에 미치는 影響

姜孝信,具本情 中央醫學社 1972 中央醫學 Vol.23 No.3

The effect of the Rhinocerotic Cornuc extract (R.C.) on the amount of total cholesterol and triglycerides in serum from rabbit were observed. The preparations were extracted by methanol; an extracted samples were orally administrated to the rabbits fasted for three days. After three days starvation, the amounts of total cholesterol and triglycerides in serum of the rabbit were markedly increased. The increased amounts of total cholesterol and triglyceides were gradually de-creased by administration of the extracted samples and were returned to the control levels after three days. According to the above results, it would be concluded that R.C. influences for the recovery of the increased amounts of total cholesterol and triglycerides by abnormal metabolism to normal on rabbit.

Convenient Preparation of Sulfonium Salts

Kang, Ja-Hyo,Ku, Bon-Chul Korean Chemical Society 1985 Bulletin of the Korean Chemical Society Vol.6 No.6

Design of X-band 6-bit CMOS phase shifter for phased array T/R modules

Kang, Dong-Woo,Ku, Bon-Hyun,Hong, Songcheol Wiley Subscription Services, Inc., A Wiley Company 2009 Microwave and Optical Technology Letters Vol.51 No.10

<P>This article presents the design of a 6-bit phase shifter in a 0.18-μm CMOS technology for X-band phased array radar application. Meandered microstrip lines and compact circuit designs techniques yield a chip with 1.9 mm<SUP>2</SUP> die area. The fabricated phase shifter demonstrates a typical 15.7 ± 1.1 dB insertion loss and a 4° rms phase shift error at 9.5 GHz. To the author's knowledge, this is the first demonstration of a 6-bit phase shifter using CMOS switches with the lowest die area among reciprocal digital phase shifters at X-band. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2404–2406, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24663</P>