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.

白茯笭이 肥滿誘導 흰쥐의 體重, 副睾丸,脂肪組織, 血液 및 遺傳子 變化에 미치는 影響

류은경,정석희,이종수,김성수,신현대 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2000 No.-

Objectives : These experimental studies were designed to investigate the effects of Poria cocos extract on the weight control and the lipid metabolism of the obese rats induced by high fat diet. They were designed to find out what was changed in the serum, and how the leptin and the leptin m-RNA were affected. Methods : The measurement has been performed for 6 weeks with obese rats. Results: 1.In the sample I (fat diet & Poria cocos group), the weight decrease significantly occurred throughout the whole research period, whereas in the sample II(normal diet & Poria cocos group), the ratio of weight decrease was significantly observed at the 4th, 5th, and 6th week(p < 0.05) 2.In the sample I, the epididymal fat weight and average size significantly decreased at the 6th week(p < 0.05). 3.In the sample I, the number of epididymal fat cell significantly decreased at the 3rd & 6th week(p < 0.05). 4.With the view of hematologic findings, I observed the increasing tendency of glucose in the sample I & II, and the significant decreasing of triglyceride at the 6th week(p < 0.05). 5.The leptin decreased in the sample I, whereas it came to increasing tendency in the sample II(p > 0.05). 6.The leptin m-RNA decreased a little in the sample I, whereas it increased in the sample(p > 0.05).

고정화 시스템을 이용한 용균효소의 생산

류병호,박종옥,진성현 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.4

해양에서 분리된 용균활성이 우수한 균주의 균체고정화에 의한 연속생산을 위한 조건을 검토하였다. Bacillus subtilis SH-1의 균체를 고정화하여 column형 reactor에 의하여 연속적으로 효소생산을 실험하였다. 연속발효의 최적조건은 담체는 3.0% sodium alginate로 직경 2.4mm의 bead를 제조하여 기질의 주입속도는 20ml/h 공기의 주입속도는 2.0ml/min이였다. Column형 reactor(용량 2.8ℓ)에 의한 연속발효시 25일까지 76.5~88.0 units/ml의 최적의 효소활성을 갖는 용균효소를 생산할 수 있었다. Bacillus subtilis SH-1 screened from coastal sea water of South Korea was used to produce bacteriolytic enzyme. The production of bacteriolytic enzyme by immobilized cells was investigated. The optimum conditions for the continuous production of the bacteriolytic enzyme using immobilized cells were 2.4 mm diameter of 0.3% alginate beads, 20 ml/h of substrate feeding rate and 20 ℓ/min of aeration rate. A productivity of 76.5 to 88.0 units/ml could be obtained for 25 days by continuous column reactor under the optimum conditions.

혈액투석중인 말기신부전 환자에서 Fludrocortisone acetate (FCA) 투여 후 혈청 칼륨 저하 효과

류봉관,강대웅,정지용,윤나라,신병철,박경희,정종훈,김현리 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.1

Background: Hyperkalemia is a commonly encountered problem in dialysis patients with end-stage renal disease. In this study we evaluated the effect of mineralocorticoid therapy (fludrocortisono acetate) on serum potassium level in the serum of hyperkalemic end-stage renal disease patients. Methods: Fourteen patients on hemodialysis receiving fludrocortisone acetate (FCA) 0.1 mg/day were observed for 2 months periods. Consecutive monthly biochemical profiles were compared for the druration of the pre-and post-treatment of FCA. Result: Fourteen patients with mean age (±SE) of 51.5 years (4 males and 10 females) and mean hemodialysis period of 51.9 months were studied. Mean serum potassium levels significantly fell (p<0.05) during the post-FCA period (5.2±0.66 mEq/L) compared with potassium levels during the pre-FCA (5.8±0.43 mEq/L) period. Pre-and post-FCA values were not different for sodium, chloride, protein, albumin, AST/ALT, glucose, blood nitrogen, creatinine, phosphate and calcium. Conclusions: FCA appears to decrease serum potassium value in patients with end-stage renal disease. These results suggested that FCA could be effective to treat hyperkalemia without any adverse effect in patients undergoing hemodialysis.

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.

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.

H_2S의 선택적 산화반응에 미치는 변형된 Zeolite X 촉매의 영향

피준현,이종대,박노국,류시옥,이태진 한국공업화학회 2003 응용화학 Vol.7 No.1

The selective oxidation of hydrogen sulfide was studied over Zeolite X catalysts(Zeolite HX, LiX, NaX, KX) that were prepared by ion exchange method. The acidity sequence of modified Zeolite X catalyst was as follow, Zeolite HX >Zeolite LiX> Zeolite NaX >Zeolite KX.The basicity sequence was reverse of acidity one. For the same conditions (reaction temperature: 225˚c space velocity: 20000h^-1), the conversion of hydrogen sulfide was decreased in Zeolite KX > Zeolite NaX > Zeolite LiX > Zeolite HX order. It was determined that the selective oxidation of hydrogen sulfide was influednced by acidity and basicity. In case of Zeolite NaX catalyst, the yield of element surfer 90% can be obtained at reaction temperature(200), the ratio of O2/H2S (0.5).

척골 지단 신경의 전기생리학적 연구

김종순,이현옥,안소윤,구봉오,남건우,김호봉,류재관,류재문 대한정형도수치료학회 2005 대한정형도수물리치료학회지 Vol.11 No.2

The ulnar nerve extends down the arm, across the elbow, and into the hand. It provides sensation to the little and ring fingers and activates many of the small muscles in the hand. The determination of peripheral nerve conduction velocity is an important part of ulnar nerve evaluation. The electrodiagnostic value as neurophysiologic investigative procedure has been known for many years but normal value of digital nerve was not reported in korea. The purpose of this investigation was to measure the digital nerve conduction velocity of ulnar nerve for obtain clinically useful reference value and compare difference in each fingers and then compare with the other countries. 71 normal Korean volunteers (age, 19-65 years; 142 hands) examined who has no history of peripheral neuropathy, diabetic mellitus, chronic renal failure, endocrinedisorders, anti-cancer medicine, anti-tubercle medicine, alcoholism, trauma, radiculopathy. Nicolet Viking Ⅱ(EMG machine) was use for detected conduction velocity and amplitude of digital nerve in ulnar nerve. Data analysis was performed using SPSS. Descriptive analysis was used for obtain mean and standard deviation and independent t-test was used to compare with ring and little finger. Conduction velocity of the right ring finger was 57.44m/sec and little finger was 55.32msec. The left ring finger was 55.55msec and little finger was 54.11msec. Amplitude of the right ring finger was 30.28µV and little finger was 48.36µV. The left ring finger was 30.67µV and little finger was 57.76µV. There were significantly difference between ring and little in amplitude (p<.05) but there were no statistically difference between conduction velocity of ring and little finger (p>.05). The amplitude of little finger are greater than ring finger. The present results revealed that electodiagnosis can easily perform in little finger for digital nerve of ulnar nerve study.

최대/최소 경계 스키마 추출 기법을 이용한 XML 문서의 DTD 추출

박경현,최은선,이종연,박정석,류근호 충북대학교 컴퓨터정보통신 연구소 2000 컴퓨터정보통신연구 Vol.8 No.2

XML이 인터넷상의 데이터 교환의 표준으로 대두되면서 데이터 모델이나 플랫폼에 관계없이 데이터의 전송이 가능하게 되었다. 특히 데이터 중심의 XML 문서의 경우 전송시의 부하를 줄이기 위해 DTD없이 전송되는 경우가 일반적이다. 그러한 이유로 전송받은 XML 데이터의 저장 효율을 높이고 질의를 최적화하며 사용자에게 편의성을 제공해주기 위해서는 XML 데이터로부터 DTD 추출이 필수적으로 요구된다. 이 논문에서는 이러한 DTD를 추출하기 위해 반구조적 데이터의 스키마 추출 기법을 적용한다. 특히, 반구조적 데이터의 최소 경계 스키마를 추출하는데 데이터로그를 이용하는 기존의 방법보다 효율적인 방법인 시뮬레이션을 적용함으로써 보다 향상된 DTD 추출 기법을 제시한다. XML makes it possible for data to be exchanged regardless of the data model in which it is represented or the platform on which it is stored, serving as a standard for data exchange format on the internet. Especially, It is natural to send XML data without DTD on the internet when XML is data-centric XML. Therefore it is needed to extract DTD to store XML data efficiently, to optimize queries, and to help users browse XML data. In this paper, Techniques for upper/lower bound schema extraction are applied to extract DTD from XML data. Especially we propose an efficient technique for extracting DTD by using simulation which is better than datalog as a lower bound schema extraction method.

관상동맥질환의 중증도와 혈중지질치 및 아포지단백과의 상관관계

임현주,황종현,류재근,정병천,조용근,채성철,전재은,박의현 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.1

목적 : 관상동맥질환의 위험인자로서 혈청지질 및 혈장 지단백에 대한 관심이 높아지고 있고 또 아포지단백이 관상동맥 질환을 일으키는데 다른 지질보다 더 중요하다는 연구가 많이 발표되고 있으나 우리나라에서는 아포지단백에 대한 연구가 그리 많지 않은 편이다. 이에 저자등은 혈중지질치와 새로운 위험인자로 알려지고 있는 아포지단백치를 측정하고 이들과 관상동맥질환 중증도와의 상관 관계를 알아보았다. 대상 및 방법 : 관상동맥질환이 의심되어 관상동맥조영술을 실시한 69명의 환자를 대상으로 하였으며 12시간 이상 공복후 혈청을 채취하여 총콜레스테롤, 중성지방, HDL-콜레스테롤, 아포지단백 AI (ape AI), 아포지단백 B (ape B)를 측정하였다. 관상동맥조영상 50%이상의 협착이 있는 혈관의 수 (lesion number), 최대협착을 합한 값 (lesion score), 각 분절의 최대협착을 합한 값 (total score), 가장 심한 협착 값 (peak stenosis) 등으로 관상동맥 중증도를 알아본 다음 이들과 혈청지질치, 아포지단백과의 상관 관계를 비교해 보았다. 상관 관계는 Spearman's correlation coefficient를 구하였다. 결과 : 관상동맥질환의 중증도와 각 지질치 간의 상관 관계를 비교해 보았을때 lesion number와 관계있는 것은 연령 (r=0.2789), 중성지방치 (r=0.2829)이며 lesion score와 관계있는 것은 연령(r=0.2911), 중성지방치0 (r=0.3316), 총콜레스테롤과 HDL-콜레스테롤의 비 (r=0.2361), apo B 치(r=0.2759), apo AI과 apo B의 비 (-0.3154)로 나타났다. Total score는 연령 (r=0.3100), 총콜레스테롤치 (r=0.2452), 중성지방치 (r=0.3022), 총콜레스테롤과 HDL-콜레스테롤의 비 (r=0.2770), apo B치 (r=0.2927), apo AI과 apo B의 비 (r=-0.3408)와 연관이 있었고 peak stenosis는 중성지방 치(r=0.3305), ape B 치 (r=0.2968), apo AI과 apo B의 비 (r=-0.3977)와 관계가 있었다. 연령으로 조정하여 partial correlation을 좌면, 관상동맥조영술상 중증도는 중성지방치 (r=0.3408), apo B 치(r=0.2877), apo AI과 apo B의 비 (r=-0.3460)와 유의한 상관 관계가 있었다. 이중 ape AI과 ape B의 비는 lesion score (r=-0.2640), total score (r=-0.3057), peak stenosis (r=-0.3460)와 유의한 상관관계를 보였다. 결론 : 이상의 결과로 보아 apo B치 그리고 apo AI과 apo B의 비가 관상동맥 중증도의 예견인자로 다른 혈중 지질 치보다 더 유용하다는 것을 알 수 있었다. Objectives : Recently, it was reported that the measurements of apolipoprotein levels may be valuable in the clinical assessment of coronary artery disease severity. However there are a few reports regarding to the relationship between coronary artery disease severity and apolipoprotein levels in Korea. Thus, we measured serum lipid and apolipoprotein levels and studied the relationship between coronary artery disease severity and serum lipids and apolipoproteins levels. Subjects and Methods : The 69 patients who underwent coronary angiography to evaluate chest pain were subjected to this study. We measured the levels of serum cholesterol, triglycerides, HDL cholesterol, apolipoprotein AI(apo AI) and apolipoprotein B(Apo B) and measured the severity of coronary artery disease by lesion number, lesion score, total score and peak stenosis. Then, we studied the relationship between coronary artery disease severity and apolipoproteins and calculated the correlation coefficient. Results : The results were as follows. There are significant correlation(r=0.3) between age, triglycerides, apo B levels, apo AI/B ratio and coronary artery disease severity. In controlling for age, tyiglycerides, apo B levels and apo AI/B ratio shows significant correlation(r=0.3) with coronary artery disease severity. Especially, apo AI/B ratio shows significant correlation(r=0.3) with lesion number, total score and peak stenosis. Conclusion : These results suggest that the apo B levels and the ratio of apo AI/B can be used as significant independent predictor for coronary artery disease severity rather than other serum lipid levels.