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.

딕카이트로부터 스멕타이트의 수열합성

류경원,장영남,배인국,채수천,최상훈 한국광물학회 2004 광물과 암석 (J.Miner.Soc.Korea) Vol.17 No.3

딕카이트[Al₂Si₂O_(5).(OH)₄]를 출발물질로 사용하여 이팔면체형 스멕타이트를 수열합성하였다. 시료를 활성화시키기 위해 Na₂O 성분을 첨가하고 800℃에서 4시간 열처리하였다. 합성실험을 Na-0.7 바이델라이트의 화학반응식에 의한 화학양론적 조성에 따라 SiO₂성분을 첨가하였으며 300℃, 70 ㎏f/㎠ 이하의 조건에서 온도, 압력, 시간 등을 변화시키면서 실험을 수행하였다. 합성실험을 위해 약 1리터 용량의 밀폐형 강철재 압력용기를 사용하였다. 스멕타이트를 합성할 수 있는 최적 조건은 반응온도 290℃, 반응시간 48시간, pH 10 및 60 ㎏f/㎠ 의 압력조건인 것으로 확인되었다. 온도, 압력조건 외에 원료물질의 활성화, 반응시간, 반응용액의 초기 pH 등은 결정도에 영향을 미치는 주요 요인으로 작용하였다. 합성결과물에 대한 X-선 회절분석, 에틸렌글리콜 처리, 'Greene-Kelly' 측정법 등의 실험결과, 합성된 스멕타이트는 Na-바이델라이트임이 확인되었다. A hydrothermal process was used to synthesize dioctahedral smectite from dickite [Al₂Si₂O_(5).(OH)₄]. Dickite was previously activated by heating at 800℃ for 4 hours with Na₂CO₃. After the heat-treatment, Sift was added for stoichiometrv. The autoclaving was carried out in closed stainless steel vessel (about 1 liter) at the condition of various temperature, pressure, time etc. High quality smectite could be obtaind by heating at 290℃ under the pressure of 60 ㎏f/㎠ for 48 hours. This experiment reveals that pH of the solution was an important factor and should be maintained at 10 to 11 for the formation of dioctahedral smectite. Be synthesized smectite was identified as Na-beidellite by the treatment of ethylene glycol and Greene-Kelly test.

Mycobacterium abscessus에 의한 슬관절 감염1예

류숙원,이창규,허진,신규성,김장수,배숙영,장은아,서인범,김영기,이갑노 대한임상병리학회 2001 대한임상병리학회지 Vol.21 No.5

활석을 이용한 사포나이트의 수열합성

배인국,장영남,채수천,류경원,최상훈 한국광물학회 2003 광물과 암석 (J.Miner.Soc.Korea) Vol.16 No.2

삼팔면체형의 스멕타이트계 사포나이트(saponite)를 천연 광물질인 활석을 이용하여 수열법에 의해 합성하였다. 출발물질은 활석에 Na₂CO₃를 첨가하여 공기중에서 800℃로 가열한 후, 화학양론적 조성에 맞게 Al(No₃)₃·9H₂O 및 Mg(No₃)₂·6H₂O 금속염 수용액을 첨가하였고, pH는 7∼12 범위 내로 NH₄OH 수용액에 의해 조절하여 제조하였다. 수열반응 조건은 약 1리터의 수열반응 용기에서 230 ℃, 압력은 25∼75 kgf/㎠의 범위 내에서 10∼60시간이었다. 실험결과, 반응온도 및 회전속도를 230℃와 180 rpm으로 고정시킨 수열조건 하에서 반응시간, 반응압력, pH 조건을 각각 40시간, 25 kgf/㎠, 약 10으로 하였을 때, 그리고, 화학조성을 화학양론적 조성에 필요한 Na₂O의 양보다 200% 과량 추가하였을 때, 양호한 사포나이트가 합성되었다. 또한 압력을 75 kgf/㎠까지 증가시켜도 결정도에 미치는 영향은 미미하였으며, 반응시간이 길수록 더 좋은 결정도를 나타냈다. Saponite was synthesized from talc by hydrothermal method. The starting material was prepared by adding Al(N0₃)₃·9H₂0 and Mg(N₃)₂·6H₂O solution to the talc powder, which was previously activated in air at 800℃ together with Na₂C0₃. The alkalinity of the solution was controlled by NH₄0H solution. The autoclaving was carried out in the closed stainless steel vessel (about 1 liter) for 40 hours under the pressure of 25 ㎏f/㎠ at 230℃. The characterization of the reaction product shows that saponite was crystallized successfully. After the experimental results, pressure was not sensitive parameter in the range of 25-75 ㎏f/㎠, but longer reaction time results in better crystallinity.

서산지역 굴피나무(Platycarya strobilacea)군락의 동태

류영수,허혜경,김성덕,박경배 忠南大學校 環境問題硏究所 1997 環境硏究 Vol.15 No.-

The regeneration process and the composition of species of climax Platycarya strovilacea S. et Z. forest was studied in Mujang-Ri, Jigok-Myon, Sosan, Chungchungnam-Do Province. Total number of vascular plant species of this community was recorded 125. This results seem to be related to various soil and light conditions in this community. The dominant trees of the stands came up beyond 12m in height. The upper tree layer is highly dominated by Platycarya strovilacea, which have more than two stems, is over 15cm in DBH class and is like stumps. They were distributed horizontally in random. Trees of the middle and lower layer were few in number and small in basal area. It tended to be distributed contagiously, in the age distribution of trees, some of the even-aged cluster which were constituted of several trees, were found in plot. The growth rates of the stem diameter for the first 20 years of the trees in upper layer were higher than those of the same species in the middle layer. These results show that the seedings which were established in dense grows with the decreasing density after the forest canopy had been broken out , and distribution pattern became in random, would constitute the canopy developing the community level.

한국인의 치과의원 내원요인 조사 연구

류영욱,배현숙,성진효,김동기 조선대학교 구강생물학연구소 2003 Oral Biology Research (Oral Biol Res) Vol.27 No.1

According to the increase of the number of dental clinics and the level of the patient's recognition about oral health care, the need for effective clinical management to provide proper oral health care service to the patients has arisen. Many patients has selected the dental clinics based on self estimation or other recommendation. Therefore the main reasons for selecting the dental clinic by the patients needed to analyze, So we conducted the survey which prepared questionnaire were provided to 700 subjects and collected data related to the factors for patients to select the dental clinics. The results were as follows : 1. In the view of access, the place easy of access and parking capacity was important to the degree of 43.0% and 30.8%, respectively. 2. In relation to the dentist, the quality of treatment and the trust was important to the degree of 80.7% and 71.3%, respectively. 3. Modern clinical facility was occupied 65.5% in the basic environment factors. 4. In the basic factors, kindness and cleanliness was 76.6% and 76.7%, respectively, and it showed that these factors were more important than the number of the clinicians and comfort of the waiting room. 5. In relation to the satisfaction of treatment, cheaper treatment cost, decreased waiting tine, the variety of treatment tine and various payment method were important to the degree of 51.8%, 48.4%, 42.8% and 39% in order.

닭에서 오존수의 급여가 닭와포자충 감염에 미치는 영향

박배근,染谷梓,류시윤,김현수,조성환,전무형,손화영 충남대학교 수의과대학 동물의과학연구소 2001 動物醫科學硏究誌 Vol.9 No.-

Ozone is very effective in acute and chronic viral disease as a virucidal agent and in improving the general health of the animals. The effects of ozonized water supply against Cryptosporidium baileyi was studied in 2-day-old chicken. After oral inoculation of chicken with 1×10^6 oocysts, ozonized water(0.5ppm) and tap water were supplied to experimental and control group, respectively. The prepatent period of both group was 6 days postinoculation(PI). The patent period of experimental group was shorter(6-18 days) than that of control group(6-22 days). The number of oocysts in the feces were maximum on days 11 PI, indicating 1.99×10^6 oocysts/experimental chicken and 6.00×10^6 oocysts/control chicken. The number of discharged oocysts during experimental period was higher in control group than that of experimental group. In the view of febric bursa sections on 7 days PI, the number of endogenous development of C baileyi was smaller in experimental group that in control group. This results indicate that the autoinfected sporozoite were damaged by ozone. The ozonized water supply to chickens is alleviation cryptosporidiosis.

ENTITY-RELATIONSHIP MODEL을 기초로한 COBOL 자료구조의 변화

박영배,류광하 명지대학교 공학기술연구소 1987 공학기술연구소 논문집 Vol.2 No.-

Recently the development of application field for Data Base, the existing FMS's, has become to transform its model to DBMS. As a part of these processes, we could find the way how general file can be applicable in Data Base areas. This paper aims to introduce a changing process from widely used COBOL Data Structure in FMS to conceptual schema E-R Type, and to show the representation method of processing in Entity - Relationship Model.

NcNamara법에 의한 한국인 악안면골의 성장 변화에 관한 연구

권배근,유영규 대한치과교정학회 1985 대한치과교정학회지 Vol.15 No.2

This study was performed to establish the Cephalometric standards and growths change of Korean Teen aged group by McNamara's Analysis. The data from Cephalometric films of 161 male and 205 female subject aged from 10 to 18 years of Normal Korean were used for this study. The following results were obtained: 1. Means, standard deviation from measured values in each age group and sexual values were obtained. 2. Greater measurement showed in male than female in Condylion to point A, Condylion to Gnathion, MaxilloMandible differential and ANS to menton in linear measurement of 18 age group. 3. Condylion to point A, Condylion to gnathion, MaxilloMandible differential and ANS to Menton are increased as the age increased. 4. Facial axis angle and Mandible plane angle of 15 and 18 aged group showed less value than that of 10, 11, 12 age group. 5. There was no significant value changes of Lower incisor to A-Po, SNA angle and Lower pharynx by the increasing of age.

안면골 골절로 인한 시신경 손상

김종배,양영철,류수장 大韓顎顔面成形再建外科學會 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.4

Optic nerve injury serious enough to result in blindness had been reported to occur in 3% of facial fractures. When blindness is immediate and complete, the prognosis for even partial recovery is poor. Progressive or incomplete visual loss may be ameliorated either by large dosage of steroid or by emergency optic nerve decompression, depending on the mechanism of injury, the degree of trauma to the optic canal, and the period of time that elapses between injury and medical intervention. We often miss initial assessment of visual function in management of facial fracture patients due to loss of consciousness, periorbital swelling and emergency situations. Delayed treatment of injuried optic nerve cause permanent blindness due to irreversible change of optic nerve. But by treating posttraumatic optic nerve injuries aggressively, usable vision can preserved in a number of patients. The following report concerns three who suffered visual loss due to optic nerve injury with no improvement after steroid therapy and/or optic nerve decompression surgery.