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.

Helicobacter pylori와 대장균의 Shuttle Vector 개발

조명제,이우곤,이상룡,김경희,안영숙,김성희,김현주,류복덕,최여정,윤영혜,백승철,전영석,이광호 경상대학교 유전공학연구소 1997 遺傳工學硏究所報 Vol.16 No.-

In this study, a vehicle vector using cryptic plasmids was constructed for gene transfer in Helicobacter pylori. pHP51(3.9 kb) and pHP489(1.2 kb) were selected for constructing vectors from cryptic plasmid of H. pylori isolates in Korea. The HindⅢ-digestedDNA fragment(1.2kb) of pHP489 and 1.6kb DNA fragment of pHP51 were ligated with a kanamycin resistance gene(aph3'-Ⅲ) from C. jejuni to produce the recombinant plasmids pHP489K and pHP51K, respectively. Transformation frequency of pHP51K by electroporation was low. But pHP489K could be effectively transformed into various H. pylori strains. In order to design an intermdiate vehicle vector for gene transfer into H. pylori, pBlueHP489K was prepared by recloning pHP489K DNA into pBluescript and pTZ19R vector. This vector permitted the DNA fragment containing pHP489 sequence, aph3'-Ⅲ, and cloned DNA to be cut and self-ligated in the SacⅠ site after cloning. ureA and ureB gene were inserted into pBlueHP489K, resulting in pBlueHP489K/AB. The DNA fragment containing pHP489, kanamycin resistance gene(aph3'-Ⅲ), and urease structural gene was cut away from pBlueHP489K/AB and self-ligated to generate pBlueHP489K/AB. pBlueHP489K/AB made urease-negative H. pylori strains restore their urease activity. By this experiment, pBlueHP489K was confirmed to be the vehicle system for transferring H. pylori genes.

주요우울장애와 정신분열병 환자에서 우울증상, 설명양식 및 역기능적 태도

류석현,박영남 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.6

Objectives : This study evaluated the explanatory styles, dysfunctional attitudes and their relationship to depressive symptoms in patients with major depressive disorder and schizophrenia. Methods : Twenty nine patients with major depressive disorder, 35 patients with schizophrenia and 43 normal controls Completed the self-rating scales for explanatory styles (Forced Attributional Style Questionnaire, FASQ), dysfuncdonal attitudes (Dysfunctional Attitudes Scale, DAS), depressive symptom (Beck Depression Inventory, BDI), and hopelessness (Beck Hopelessness Scale, BHS). Results : Patients with major depressive disorder (BDI : 27.0±14.30, BHS : 8.81±6.59) and those with schizophrenia(BDI : 16.1±2.39, BHS : 5.6±5.21) had significantly higher BDI and BHS scores than normal control (BDI : 5.8±5.53, BHS : 2.4±3.61). DAS total scores were significantly higher in patients with major depressive disorder (171.3±22.96) and schizophrenia (161.8±32.96) than normal control (139.9±30.94), but there were no significant differences between patients with major depressive disorder and schizophrenia. Regarding FASQ subscales, the global positive score was significantly higher in patients with major depressive disorder (3.7±1.36) and with schizophrenia (3.4±1.73) than normal control (2.5±1.39). BDI total scores correlated significantly with stable negative and global negative scores of FASQ in major depressive disorder, but only with global negative scores in schizophrenia and normal control. DAS total scores correlated with BDI scores not only in major depressive disorder, but also in schizophrenia and normal controls. Conclusion : The results suggested that dysfunctional attitude is significantly severe not only in patients with major depressive disorder but also in schizophrenic patients compared to normal control. Also, there seems to be a positive correlation between Cognitive distortion and depressive symptoms not only in major depressive disorder, but also in schizophrenia. However, this study is not able to clarify their causal relationship. Further study is necessary to clarify the causal relationship between depressive symptoms and cognitive distortion and the cultural effect on cognitive distortion in major depressive disorder and schizophrenia.

형광검출 역상 액체크로마토그래피에 의한 Histamine의 정량

유희춘,김형룡,김상현,김대기,이영미,김형민,안년형,신태용 우석대학교 의약품개발연구소 1996 藥學硏究誌 Vol.1 No.-

Histamine을 정확하고 신속하게 정량하기 위해 9.Fiuorenylmethyl chloroformate를 형광유도체화제로 하여 역상 HPLC법으로 정량하였다. 히스타민을 형광유도체화할 때 반응액의 pH, 반응시간, 형광유도체화제의 농도 등 최적 반응 조건을 검토하였다. 이 방법으로 히스타민을 분석한 결과 0.1~0.5ug/ml의 농도범위에서 상관계수가 0.922인 양호한 직선성을 나타내었으며 검출한계는 0.01??/ml였다. A rapid and simple method for the determination of histamine by reverse-phase high performance liquid chromatography with fluorescence detection was established. 9-Fluorenylmethyl chloroformate(FMOC) was used as fluorescent derivative reagent. The optimum conditions for the derivatiation such as pH, reaction time and he concentration of FMOC were investigated. Linearity of calibration curve was obtained between 0.1ug/ml/and 0.5ug/ml(r=0.922) and the limit of detection was 0.01ug/ml.

하이퍼 큐브네트워크를 이용한 Radiance Estimation 프로세서의 설계

류현우,김영진,이현수 경희-다반 ASIC 설계교육센터 2005 경희-다반 ASIC센터 논문집 Vol.6 No.-

본 논문에서는 Radiance Estimation 연산에 존재하는 전역적인 병렬성을 처리할 수 있는 구조를 제안한다. 기존의 소프트웨어 처리는 계산에 필요한 많은 연산의 시간이 필요로 하기 메문에 하드웨어 적인 구현의 필요성이 증대하였다. Radiance Estimation 알고리즘의 병렬성을 이용하여 SIMD 처리 방식으로 설계를 하였으며 연산의 단위인 Cell의 통신은 4차인 하이퍼 큐브 네트워크를 이용하여 데이터간의 효율성은 높였다. 그리고 연산의 신호에 따라 다양한 기능을 하는 Cell로 구성을 하여 Radiance Estimation 연산의 Photon 검색과 밀도추정 연산을 하나의 시스템에서 적용이 가능하였다.

대전공단지역의 대지중 독성 금속의 농도 분석

류영태,남병현,이진흥 忠南大學校 環境問題硏究所 1997 環境硏究 Vol.15 No.-

In spite of lower concentration of toxic metals in urban air, the magnitude of health risk associated with may not be smaller than that by other airborne hazardous pollutants. Especially, it has been expected that the risk from an industrial complex may be much higher by toxic metals including carcinogenic ones. However, unfortunately there has been few domestic research on the concentration profile and risk assessment of airborne toxic metals in such area. The reason may be that the final objective of studies performed before for our urban air was either source characterization or quantitative source estimation of suspended particulate matter and development of a receptor model. Thus, few investigation into the concentration distribution for toxic metals such as As, Be , Cr, Ni, Se, Sb and V has been done. Therefore, this research will focus on 2-year- analysis(twice or four times per month) by using ICP-MS and ICP-AES for the concentration of heavy metals in Taejon Industrial Complex. ICP-MS has much more excellent detection limits and reproducibility for many toxic metals than any other analytical technique. Total suspended particulates were collected on quartz fiber filters by a high volume air sampler. About 20 metal elements including 13 toxic ones were analyzed by ICP-MS and ICP-AES after the pretreatment of mixed acid extraction. As a part of the research, the following results for the period of from June to August, 1997 were summarized : (1) the geometric mean concentration of TSP was 87.28㎍/㎥ during the sampling period in the study area. The maximum was 114.16㎍/㎥ in the 4th week of August while the minimum was 47.97㎍/㎥in the first week of August; (2) much higher concentrations of Pb and Zn were noted among toxic metals and their geometric means were 288.31ng/㎥ and 153.47ng/㎥, respectively. The highest concentration of Pb was 570.99ng/㎥ in the 4th week of August while that of Zn was 279.03 ng/㎥ in the first week of June;(3) the concentration of each Ni, Mn, Zn and Fe was found to be highly correlated with that of TSP, which indicated the greater impact of man- made pollution in the area. The concentration of elements such as Al, Ca and Mg related to soil and road dust was found to be the highest in June and their correlation coefficients were estimated to be very high.

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.

암모니아성 질소(NH_4^+-N)제거를 위한 제올라이트성 물질의 제조

류태공,류재춘,한명식,김철규,김영호,양현수 忠南大學校 産業技術硏究所 2002 산업기술연구논문집 Vol.17 No.2

The objectives of this study were to synthesize high ion-exchangeable zeolitic materials prepared from coal fly ash and to determine the adsorption capacities for the removal of NH_4^+4-N in wastewater For comparison. NH_4^+-N adsorption capacities of commercial, natural, and synthetic(4A type, Si0_2/Al_2O_3=1.98. Na_2O/SiO_2=1.54. H_2O/Na_2O=46.95) zeolites were investigated at the same condition. Zeolitic materials were prepared from coal fly ash by hydrothermal reaction with various NaOH concentrations at the reaction time of 4h and the reaction temperature of 100℃. It showed that the zeolitic material prepared at a 4M-NaOH concentration had the most NH_4^+-N adsorption capacity. Theremoval efficiency of NH_4^+-N on the zeolitic material was little difference compared with those on natural and commercial zeolites, though it was lower than that on a synthetic zeolite(4A type). As a result, it is expected that the prepared zeolitic material could be applicable to adsorbent for the NH_4^+-N removal in wastewater.

정전방지용 접착테이프에 관한 연구

류해일,백중현,김영유 공주대학교 사범대학 과학교육연구소 1998 과학교육연구 Vol.29 No.1

현대 과학에서 가장 첨예하게 대두되는 것은 전자 제품의 개발 및 경쟁적 연구 투자이다. 고도의 기술을 요하는 전자 제품의 사용은 그 목적과 이용 방법에서 새로운 특성과 안전을 요구하고 있다. 특히 항공기, VTR, TV, 전자 회로, 컴퓨터 등의 정밀 제품에서 발생하는 전자기적 간섭 효과는 기기의 정밀도 및 수명을 저해하며 파괴의 원인이 되어지고 있다. 이러한 관점에서 본 연구에서는 유리, 금속 표면, 전자장치, 폭발물 및 인화성 보관 용기 등의 각종 전자 제품에 이용할 수 있는 전도성 수지 및 테이프를 개발하여, 전자기 제품에 안정성을 제공하고 수지의 전기전도도, 접착력, 내열성, 박리 강도, 점도 및 정전기 발생 등의 물리적 특성을 분석하여 최적 조건을 도출하여 개발하고 그의 응용성을 연구하였다. Nowadays, the development of the tapes which have anti-electrostatic adhesion at aircraft, VTR, TV, electric circuit, and computer brings much profits to industries. The development of industrial techniques needs specialized materials which are stable under the chemical and physical conditions, because it provides valuable products on a particular type of adhesive property. In this study, anti-electrostatic adhesive tapes were studied as a new form which can be used on glass, metal surface, electronic products, electronic device, car, aircraft accessaries, and exploder.

악안면 성장양상에 따른 하악이부 형태에 관한 연구

남현진,유영규 대한치과교정학회 1996 대한치과교정학회지 Vol.26 No.5

교정치료에 있어서 악안면 성장의 양상은 진단과 치료계획 수립에 있어서 매우 유용한 자료이며 교합의 달성 및 안모의 형태, 발육에 많은 영향을 미친다. 따라서 성장유형의 분류에 대한 많은 연구가 있었으며 성장예측을 위한 많은 시도가 있었다. 이에 본 연구에서는 성인 120명을 대상으로 치료전 측모두부계측 방사선사진을 이용하여 전안면고경에 대한 후안면고경의 비를 측정하여 56%-62%는 시계방향 성장군(36명), 65%-80%는 반시계방향 성장군(43명)으로, 그리고 62%-65%는 정상군(41명)으로 분류하고 이에 따른 하악이부의 형태와 돌출정도 평가를 시행한 결과 다음과 같은 결과를 얻었다. 1. 남녀 하악이부 형태비교에 있어서는 남자가 여자보다 이부의 높이와 돌출정도가 크게 나타났다. 2. 시계방향 성장군이 반시계방향 성장군에 비해 하악이부의 Height, H/D ratio, Actual length는 크게 나타났고, Depth, Angle, Effective length, E/A ratio는 작은 값을 나타냈다. 3. 악안면 성장양상에 있어 이부의 돌출정도가 작을수록 시계방향성장 경향을 나타내며, 돌출정도가 클수록 반시계방향성장 경향을 나타냈다. Craniofacial growth pattern is an important diagnostic data in the course of orthodontic diagnosis and treatment planning ; it also has great influence in the establishment of occlusion as well as shaping and development of face. There have been many studies to classify different craniofacial growth patterns and attempts to predict growth patterns. This study aimed to correlate craniofacial growth pattern and symphysis morphology. 120 adult patients with age from 19 to 39 (mean age :231) were chosen as subjects ; using lateral cephalometric films their anterior to posterior facial height ratios were calculated. They were divided into 3 groups - clockwise growth pattern with 56%-62%(36subjects), counter-clockwise growth pattern group with 65%-80%(43subjects) and normal growth pattern group with 62%-65%(41subjects). Symphysis morphology and prominence evaluation in each subject were studied and the following conclusions were drawn : 1. In comparison of symphysis morphology between the sex groups, men showed large symphysis height and prominence. 2. Concerning the symphysis morphology, the clockwise growth pattern group showed larger height, H/D ratio and actual length but smaller depth, angle, effective length and E/A ratio compared to the counter - clockwise growth pattern group. 3. Those with smaller prominance of symphysis showed clockwise growth tendency and those with larger prominance showed counter-clockwise growth tendency.