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토양 방선균 Actinomycetes G-0299의 바랭이에 대한 선택적 살초특성
최정섭,김영숙,김재덕,김혜진,고영관,박기웅,문석식,Choi, Jung-Sup,Kim, Young Sook,Kim, Jae Deok,Kim, Hye Jin,Ko, Young-Kwan,Park, Kee Woong,Moon, Surk-Sik 한국잡초학회한국잔디학회 2017 Weed & Turfgrass Science Vol.6 No.3
방선균 G-0299의 살초특성을 확인하여 천연 제초제 후보소재로서의 가능성을 검토하고자 수행하였다. 선발된 방선균 G-0299는 바랭이에서만 살초력이 발휘되었을 뿐만 아니라 경엽처리 효과, 엽록소 함량 등의 생리 생화학적인 반응에서 광조건에서만 발현되는 독특한 살초특성을 보였다. 방선균 G-0299 배양 여액 농축 시료를 처리했을 때 속효성이며, 고사 또는 백화현상이 발현되는 등의 특징으로부터 광합성 저해 또는 protox 저해 제초제와 비슷한 작용기전을 갖고 있을 가능성을 유추해 볼 수 있겠으나 오직 바랭이에서만 살초력이 발휘되는 특이한 현상을 고려하면 상관성을 설명하기는 곤란하였다. 따라서 천연 제초활성 후보소재 방선균 G-0299의 보다 상세한 살초기 전에 관해서는 추가 연구를 통해 구명되어야 할 것이다. An actinomycetes isolate G-0299 obtained from a forest soil showed strong phytotoxic activity to Digitaria ciliaris. For the foliar application study, the culture filtrate of the isolate G-0299 showed strong herbicidal activity only to D. ciliaris among the 12 monocot and 5 dicot weed species. And herbicidal activity at a concentration of 500, 250, 125 and $62.5{\mu}gmL^{-1}$ of culture filtrate was 100%, 98%, 70% and 40%, respectively. Phytotoxic symptoms of the culture filtrate by foliar application were desiccation and burn-down or bleaching of leaves and finally plant death. And then the herbicidal activity was exhibited only under the light condition. Also, chlorophyll loss of D. ciliaris leaf tissues in the light condition was much higher than in the dark condition and then chlorophyll content decreased 82%, 5%, respectively. In conclusion, our results suggest that soil bacteria, isolate G-0299 could be a good candidate for new bio-herbicide and provide a new lead molecule for a more unique herbicide.
崔正燮(Choi, Jung-sup) 중국어문학연구회 2015 중국어문학논집 Vol.0 No.92
Ernest Fenollosa"s essay "The Chinese Written Character as a Medium for Poetry" has exerted influece on the study of Chinese Literature almost a century long. Many scholars and poets praise this essay, but others, especially philological sinologists, criticize it. In Korea, there has been no discussion about this essay, but just rumors about it, because there is no Korean translation of it. Here is the first Korean translation of the essay, annotation added. From this translation, scholars of Chinese literature in Korea may get some helps in studying the western views on China and her literature.
최정섭(J. S. Choi),경진호(J. H. Kyung),노승국(S. K. Ro),김창기(C. K. Kim),박종권(J. K. Park) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
The design of a miniaturized spindle system applied active magnetic bearings(MB) is discussed. The proposed system is consisted of radial and axial magnetic bearings. The radial magnetic bearing is hybrid type, permanent magnet for bias magnetic flux and electromagnet for control current. And the axial magnetic bearing is only used electromagnet. Therefor this system is a 5 degrees of freedom active control system. In this paper, we suggest the design specification, such as stiffness, length and width of each part, including permanent magnet. We will apply this spindle system to micro machine tool system for micro factory.
崔正燮(Choi, Jung-sup) 중국어문학연구회 2013 중국어문학논집 Vol.0 No.78
Ethnolinguistics is a method to seize some aspects of recent theories about Chinese linguistics and Chinese culture. The relation between national language and culture is very close, but it is somewhat risky to stress excessively peculiarity of Chinese national culture and language, especially its written characters. Recently, in China, some scholars argue against the universality of Western grammaticality and call for the return of rhetoric. Their arguments are must be scrutinized, for rhetoric is not characteristic of Chinese only, and other languages have also their own rhetoric. After all, claims to the uniqueness and incommensurability of Chineseness is doubtful, therefore, claims of Chinese ethnolinguistics and cultural nationalism have their own limits.
최정섭(J. S. Choi),경진호(J. H. Kyung),노승국(S. K. Ro),박종권(J. K. Park) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
The design of a miniaturized air spindle system suspended a magnetic bearing is discussed in this paper. We designed and manufactured for the machine tool of micro factory system. The proposed spindle is consisted of air bearing unit for supporting both side of the radial and axial direction and a magnetic bearing unit for controlling in the radial direction. The used air bearing is aero-static type and the equipped magnetic bearing is a homo-polar type magnetic bearing which has 4 poles and 4 coils. This magnetic bearing is located in the top side of the spindle for improvement of damping of air spindle. The diameter and length of the spindle are 84㎜ and 112㎜, respectively. We discussed the performance of an air bearing and a magnetic bearing in analytical and experimental approach.
崔正燮(Choi, Jung-sup) 중국어문학연구회 2014 중국어문학논집 Vol.0 No.89
Appropriation of China by Japanese Kangaku is supported by two main disciplinesetymology and kunyomi. Shiakawa"s Chinese etymology and other Japanese scholars" theories on kunyomi must be scrutinized by scholars of Chinese Studies or Sinology. Difference in Chinese character reading, among east asian countires, is the starting point and the most important thing in refuting the arguments of Japanese rightist scholars.