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魯斗鉉,沈在燮 충북대학교 엽연초연구소 1971 煙草硏究 Vol.1 No.-
The Present paper was initiated to solve the problems of effective fungicides favorable times and frequencies of spraying in order to control tobacco brown spot in the field. Sample fungicides were Dithane M-22, Orthocide, Fermate and Bordeaux mixture added with PTA-B which were selected by spore supressing method in laboratory. Among the above fungicides ; 4-4 Bordeaux mixture added with PTA-B(1/3000) showed the most effects and the following degreeing order in the effects was recognized ; Dithane M-22, Orthocide and Fermate. The time and frequency of spraying was carried out wish 8 treatments with a combination of 3times and 3frequencieg. The results were as follows: Treatment No.4, No.6 and No.7 stowed the best effects and next effectes was appeared in the treatment No.2, No3 and No5. Although treatment No.1 showed almost no effects, it seems to be important that the best group, treatment No.4, No.6 and No.7 include the treatment No.1 when no outbreaks were found at all. Treatment No.1 ~ Three applications in former period of outbreak. Treatment No.2∼Three applications in same period of outbreak. Treatment No.3~Three applications in later period of outbreak. Treatment No.4~Each 3 applications in former and same period of outbreak. Treatment No.5~Each 3 applications in same and later period of outbreak Treatment No.6~Each 3 applications in former and later period of outbreak Treatment No.7∼Each 3 applications in former, same and later period of outbreak Treatment No.8~control.
魯斗鉉,沈在燮 충북대학교 엽연초연구소 1971 煙草硏究 Vol.1 No.-
This study was carried out for the purpose of forecasting and prevention the tobacco brown spot disease. The numbers of spore disporsal flying around the fields A, B and C were counted every day from June to August in 1968. The disease development was investigated from the one of the three fields during the above similar period. The meterological data was observed by the Cheongju, Meterological station. The results obtained are as fallow The spore dispersion curvets of the three tobacco fields have shown similar tendency each other. The highest peak of spore dispersal which was appeared before the occurence of the disease has shown in the middle of June in the case of korea. Several other peaks were found later during the occurence period of the disease. The spore dispersion curves seemed to he related with differences in temperatures and the precipitations. The occurence of this disease started to appear in the fields later the early of July and was closely related with the mean temperatures at 25℃. The older tobacco leaves grew and the upper the leaves grew up, the more the disease development increased. The virulent period of this disease was reached the peak at the latest harvesting stage of the leaf tobacco around the last of August.
Antioxidation action of ZnDDP blended with MoDDP in mineral oil
Da-Chang Du,Kim, Seock-Sam,Chun, Jung-Sik,Suh, Chang-Min,Kwon, Wan-Seop 경북대학교 트라이볼로지연구소 2001 INTERNATIONAL SYMPOSIUM ON HIGH PERFORMANCE OF TRI Vol.2001 No.-
The flow analyzed is that of viscous gas within a clearance of binary thrust bearing with spiral grooves having identical geometry at both working surfaces. The boundary conditions for velocity take into account the slip effects of the first and second orders according to Cercignani-Sliozkin method. The essentially nonlinear equation is obtained for determination of dominating pressure in active zone of binary models; the equation is fit for a wide range of Knudsen numbers. The algorithms are developed for calculation of the integral characteristics of binary thrust bearing. The refined data are presented concerning the optimal parameters and advantages of binary bearings. According to the optimization data the computational tables are constructed which permit to realize the design of the experimental models of binary thrust bearing without additional calculations.
Park, Jimin,Du, Ping,Jeon, Jin‐,Kyung,Jang, Gun Hyuk,Hwang, Mintai Peter,Han, Hyung‐,Seop,Park, Kwideok,Lee, Kwan Hyi,Lee, Jee‐,Wook,Jeon, Hojeong,Kim, Yu‐,Chan,Park, Jong Woon WILEY‐VCH Verlag 2015 Angewandte Chemie Vol.127 No.49
<P><B>Abstract</B></P><P>Although the use of reactive oxygen species (ROS) has been extensively studied, current systems employ external stimuli such as light or electrical energy to produce ROS, which limits their practical usage. In this report, biocompatible metals were used to construct a novel electrochemical system that can spontaneously generate H<SUB>2</SUB>O<SUB>2</SUB> without any external light or voltage. The corrosion of Mg transfers electrons to Au‐decorated oxidized Ti in an energetically favorable process, and the spontaneous generation of H<SUB>2</SUB>O<SUB>2</SUB> in an oxygen reduction reaction was revealed to occur at titanium by combined spectroscopic and electrochemical analyses. The controlled release of H<SUB>2</SUB>O<SUB>2</SUB> noticeably enhanced in vitro angiogenesis even in the absence of growth factors. Finally, a new titanium implant prototype was developed by Mg incorporation, and its potential for promoting angiogenesis was demonstrated.</P>
김두섭,Kim, Du-Seop 한국인구학회 2007 한국인구학 Vol.30 No.1
이 연구의 주된 목적은 IMF 외환위기를 계기로 사회경제적 차별출산력의 양상이 어떻게 변화하였는가를 파악하는 것이다. 이 연구는 2003년 전국출산력조사 자료를 활용하여 20-49세 기혼 여자의 총출생아수와 1998년 이후의 출생아수를 비교분석하였다. 또한, 분석대상을 1997년 이전에 결혼하였거나 재혼한 부인들과 1997년 이후 처음 결혼한 부인들의 두 집단으로 구분하여 출산력 수준과 출산행태를 비교함으로써 IMF 외환우기 이전과 이후의 변화양상을 파악하고자 시도하였다. 총출생아수에 대한 분석 결과. 부부의 사회경제적인 조건과 출산수준은 대체로 뒤집어진 J 자형의 관계를 유지하는 것으로 밝혀졌다. 즉 사회경제적 지위가 높아질수록 출산수준이 낮아지는 경향이 발견되었다. 그러나 사회경제적 지위가 가장 높은 집단은 바로 밑의 집단 보다 출산수준이 상대적으로 높았다. 그런데, 최근의 출산수준은 이러한 사회경제적 차별출산력과는 뚜렷하게 대조적인 양상을 나타냈다. IMF 외환위기 이후 출산수준 감소의 폭은 기존의 출산수준과 정비례하는 방식으로 미루어졌다. 출산수준이 높은 집단일수록 급속한 출산력 저하가 이루어졌으며 출산수준이 낮은 집단에서는 상대적으로 변화가 완만하였다. 그 결과, 최근의 출산수준은 중상층에 해당하는 사회경제적 지위를 지닌 집단이 가장 높고, 다음이 최상위 집단, 그리고 하위 집단의 순으로 바뀌었다. 이러한 경향은 부부의 교육수준, 직업, 종사상 지위, 주관적 계층에 따른 최근 출산력의 변화양상에서 일관적으로 나타났다.