규산질 비료의 참외 흰가루병 발생 억제 효과

류나현,최미영,류연주,조현종,이용세,이영득,정종배 한국환경농학회 2003 한국환경농학회지 Vol.22 No.4

토양에 시용한 규산의 참외 흰가루병에 대한 직접적인 억제 효과와 살균제의 방제 효과를 증진시킬 수 있는 보조효과를 조사하였다. 규산질 비료의 처리는 철가루병 균에 의해 감염된 참외 잎에서 균사의 생장과 분생포자의 형성을 억제함으로써 흰가루병 발생을 일부 억제할 수 있는 것으로 조사되었다. 물론 규산질 비료 자체만의 흰가루병 발생 억제 효과는 매우 미약한 수준이었으나 살균제의 흰가루병 방제 효과를 크게 증진시켜줄 수 있는 것으로 나타났다. 따라서 현재 농가 현장에서 밝혀지고 있는 규산질 비료의 참외 병해 발생 억제 효과는 주로 이러한 살균제의 효과를 증진시킬 수 있는 규산의 보조적인 작용에 기인하는 것으로 판단된다. 따라서 토양에 대한 적절한 수준의 규산질 비료의 시용은 살균제의 방제 효과 증진을 통하여 과다한 약제의 사용과 그에 따른 부작용을 경감시킬 수 있을 것으로 보인다. 규산질 비료의 흰가루병 발생 억제 효과를 증진시키기 위해서는 앞으로 병의 발생을 최대로 억제할 수 있는 참외 잎 중의 적정 규소 함량에 대한 검토 등의 추가적인 연구가 필요할 것이다. Silicon is known to accumulate in plants and results in greater resistance to diseases and insect pests. In this study, we investigated the effect of silicate fertUizer applied in soil on the development of powdery mildew of oriental melon Oriental melon seedlings of four-leaf stage were transplanted and grown in a plastic film house. silicate fertilizer was applied to maintain soil available SiO₂ level of 200 ㎎/㎏ one week before transplanting. Fungicide trinumizol was sprayed three times; one, two, and three weeks after transplanting. Sphaerotheca fuliginea was inoculated 2 weeks after transplanting. The number of infected leaf and the number of fungal colony in leaves were measured one, two, and three weeks after the inoculation. Three weeks after the fungal inoculation, in the treatment of fungicide triflwnhl, infected leaf numbem and number of colony per leaf were reduced by 10 and 58% respectively. In the silicate fertilizer treatment, infected leaf numbers and numbers of colony per infected leaf were suppressed only by 6 and 16%, respectively, and the efficacy was lower than that of the fungicide triflumizol. The combined treatment of silicate fertilizer and the fungicide suppressed powdery mildew more effectively, and infected leaf numbem and numbem of colony per leaf were reduced by 31 and 80%, respectively. These results indicate that although silicate fertilizer itself is not much effective in the suppression of powdery mildew, it can significantly enhance the efficacy of the fungicide.

龜何歌의 儀式構造內的 意味 : 歲時儀式과의 관련을 중심으로

柳鍾穆 東亞大學校 1992 東亞論叢 Vol.29 No.1

The Purpuse of this study was to analyze the internal meaning of 'KWIHAGA' in ceremonial struc-ture, which was compared with King Suro's enthronement seremony to 'CHISINPAPKI' (stepping the God of the earth). The findings in this study can be concluded as followes. 1. The procedure of CHISINPAPKI which werl composed of coming down the God, greeting the God, main ceremony, and the final ceremony was mached with descending egg, greeting egg, growth part, and the enthroement part of king Suro's enthronement ceremony. 2. The parts of descending egg in King Suro's enthronement ceremony were analyged by 4 parts. 'KUL BONG JEOUNG CHAL TO' was found as the establishment of ceremonial altar and 'KWI-HAGA' was also understood as the cleansing of ceremonial altar area. 3. In order to establish the afuthority of nation King Suro emphasized to use the religious servise with enthronement ceremony. 4. Owing to the script of letter in Munjong period, the content of King Suro's myths which were transmitted by oral methods was changed very much.

황강의 저서성 대형무척추동물의 군집구조에 관한 연구

류성만,전영태,이종욱,차진열 嶺南大學校 基礎科學硏究所 1997 基礎科學硏究 Vol.17 No.-

The present study was conducted to determine the community structure in Whang river based on the benthic macroinvertebrates. The survey area included eight sites in Whang river and two sites in Nakdong river and the study was carried out from March of 1995 to February of 1996. The result are as follows; (1) Benthic mactoinvertebrates are composed of a total of 200 species including 114 genera, 71 families, 21 orders, 7 classes in five phyla. A total of 200 species was found in Whang river, however only 66 species were recorded in Nakdong river. 2) Species frequency was different depending on the study area. It ranged from 84-112 species in the upper stream(site 1 to 6) to 71-75 species in the lower stream(site 7 to 8) and 41-58 species in the Nakdong river(site 9 to 10). Taxa with highest species frequency were aquatic insecta. 3) Average number of individuals was 1656.5/0.5㎡ in the whole study aera. Inividual number was variable from 53/0.5㎡ at the site 8 to 296.8/0.5㎡ at the site 4. Taxa with highest individual species frequency were aquatic insecta. 4) Trichoptera and Ephemeroptera were dominant in upper stream, while Chironomidae was the most aboundant group in the lower stream. 5) Average dominance(DI), species richness(RI), species diversity(H'), and evenness(J') were 0.68, 2.71, 3.10 and 0.71, respectively, in the whole study area. The biotic indices in Whang river were relative higher than that of Nakdong river. 6) Functional feeding groups were collectors and shredder at site 1 to 6, filterer at site 7 to 10.

韓國沿岸의 外力要素別 極値統計解析 1.長週期性 海面變動

柳靑魯,朴鍾和 釜山水産大學校 1988 釜山水産大學 硏究報告 Vol.28 No.1

The purposes of this paper are to estimate extreme water levels according to the return period from statistical analysis of annual maximum extreme seawater level data observed at 12 coastal stations in Korean peninsula by applying the Gumbel and Weibull distributions and to establish reasonable design water levels for coastal structures around the Korean peninsula. The result shows that the approximated higher high water level and the lower low water level, which have been used as design water levels, are underestimated even than the water levels of the return period 10 years. Reasonable design water levels according to the importance and the function of structures are proposed in the result.

현역군인 발생을 중심으로 본 2001년도 국내 삼일열 말라리아 발생 현황

류승호,이원자,김영아,채종일,박재원 대한감염학회 2002 감염 Vol.34 No.5

Gemcitabine-PLLA 컨쥬게이트의 합성과 초임계 유체를 이용한 Gem-PLLA 미립자 제조

유종훈 水原大學校 2013 論文集 Vol.27 No.-

Nano- and microparticulate drug delivery systems have widely been studied to achieve selective targeting of tumor cells through the enhanced permeability and retention effect. Conventional methods used to prepare drug-loaded polymeric nano- and microparticles include dialysis, emulsion/solvent evaporation and micelle technique. However, these methods generally have some limitations such as low drug loading efficiency, low drug distribution, and broad particle size distribution. In this study, to increase the loading efficiency of gemcitabine, an anti-tumor agent, gemcitabine-poly(L-lactic acid) (PLLA) conjugates were synthesized through an amide linkage reaction of N-hydroxysuccinimide with triethylamine. Then, gemcitabine-PLLA conjugate particles were prepared using a supercritical fluid process, called aerosol solvent extraction system (ASES) and their mean particle size and distribution as well as drug release profiles were investigated in detail. The FT-IR and 1H-NMR spectra confirmed that gemcitabine-PLLA conjugates were prepared successfully. The conjugation yield of Gem-PLLA varied significantly with the PLLA molecular weight. The Gem-PLLA particles obtained from ASES process showed a non-spherical shape and their mean size was varied from nano- to micro-scale depending on the PLLA molecular weight. No significant amount of gemcitabine was released in a phosphoric acid buffer solution of pH 7.4 up to 120 h at 37oC.

無電解鍍金에 의한 Ni-T1-P 合金皮膜의 耐蝕特性

류일광,정종현 광주보건대학 2002 論文集 Vol.27 No.-

The crystalline structure and corrosion resistance properties were investigated on the nickel-thallium-phosphorus alloy deposits by electroless-plating. The electroless nickel-thallium-phosphorus alloy deposits were achieved with a bath using sodium hypophosphit as the reducing agent and sodium citrate as the complexing agent. The basic plating solution is composed of 0.1M NiSO₄, 0.005∼0.01M T1₂SO₄, 0.2M sodium hypophosphite, and 0.05M sodium citrate and the plating condition were pH 5.5, temperature 90℃. The results obtained are summarized as follows: 1) Sodium citrate as a complexing agent was most suitable in view of plating rate, the stability of plating bath, and surface condition. To increase T1 % of alloy deposits, it is necessary to increase either the concentration of sodium citrate of the plating solution within the range of 0.02 to 0.01M or the ion concentration of T1 within the range of [T1^(+)]/[Ni^(2+)]= 0.1. 2) The deposition rate and P content of deposits increased as the concentration of reducing agent, sodiun hypophosphite was increasing, but over 0.3M T1 deposition didn't occur, and P content tended to adversely decrease as the amount of T1 increased. 3) The crystal structure of deposit was amorphous structure as deposited state, became microcrystallized centering on Ni(111) plane by heat treatment at 200℃, and grew as polycrystalline Ni, Ni₃P, Ni_(5)P₂, T1, etc. by heat treatment higher than 350℃. The grain size of plated deposits was grown up to 28.3∼42.0㎚ by heat treatment for 1 hour at 500℃. 4) The corrosion resistance of plated deposit decreased as T1 content was increased. And The corrosion resistance of 5-6% T1 alloyed deposit was better than that of Ni- P deposit. For the corrosion test with 1N-H₂SO₄ sol. the corrosion resistance was good in case of the immersion within 48hrs. while sudden corrosion proceeded over that time.

地代論의 問題點과 硏究成果

류종완 全北大學校 1984 論文集 Vol.26 No.-

In this treatise, Physcocrats' viewis on farm rent, and the common views on so-called the law of dimininishing returns are theoretically and critically examined in relation to the theory of differential rent. In France, in the latter half of the 18th century, Physiocrats viewed that the farm rent which is paid to the sovereign by farmers as tax is only net products, and that these net products are derive from the specific productivity of agriculture, or absolute productivity of agriculture. Accordingly they thought that agriculture is only productive industry, and the other industies, for example, manufacture and commerce are nonproductive industry. In this light, they insist that the tax as financial revenue should be imposed upon only farmers(capitalistic farmer). This is so called the theory of single land tax. Nowadays in the light of rent theory, we can say that Physiocrat's view-point on farm rent is false. What is the fault of it? That is the problem which this treatise tries to examine theoretically and critically. So-called the law of diminishing returns was proposed originally as the law of agricultural production, or as the law of farm land. From the first, the law incited many scientists' controversies. But history proves that there is no evidence that the law of diminishing returns operate. And yet, nowadays, by not a few of man, this law is recognized as a common and general law which is adaptable everyindustry. Inspite of historical proof that law is false, the idea of the law still exists. The confusion is due to the imperfection of the analitic theory concerning the law of diminishing returns. Recently there appears critical, and sharp analitic theory against it. This treatise tries to introduce that theory as easily and complementally as posible.

가상현실 고소공포증 치료시스템을 위한 생체신호 분석에 관한 연구

柳宗賢,白承和,白承殷,金東完 明知大學校 産業技術硏究所 2005 産業技術硏究所論文集 Vol.24 No.-

Acrophobia is a symptom of feeling an abnormal fear of heights. Medications or cognitive-behavior methods have been mainly used to treat the acrophobia. In these days the virtual reality technology has been applied to treat such an anxiety disorders. But former acrophobia treatment systems use only patient's score of the questionary to appraise. The new system developed in this thesis uses not only patient's score of the questionary but also biomedical signals such as HR, GSR amplitude to increase the objectivity and quantitativity. The experimental results show that HR and GSR amplitude are useful for decision of acrophobia. We will apply this system to the acrophobia patient and be able to offer better medical treatment for mental illness in near future.

막스 프리쉬에게 있어서 희곡형식으로서 모델과『비더만과 방화범』에서 모델로서 주인공

류종영 목원대학교 어문학연구소 1991 어문학연구 Vol.1 No.1