養漁飼料의 添加物로서 라이신 效果에 關한 硏究

劉奉錫,李廷烈,金鐘連 군산대학교 1991 群山水産專門大學 硏究報告 Vol.25 No.2

To investigate the effect of lysine as a additive to fishfeed, a series of studies on Israeli carp(Cyprinus carpio) and eel(Anguilla japonica) were carried out during the cultivation period of 124 days. During the cultivation periods, the daily growth and growth rate were appeard 0.55g and 6.7times for elver, 1.11g and 4.0 times for young eel, 40.97g and 2.8 times for preadult eel, 1.96g and 3.8 times for fingerling carp, 14.94g and 6.1 times for preadult early, and 161.31g and 2.0 times for adult Israeli carp, respectively. The effect of lysine as a additive to fishfeed were respectively showed superior results in 0.3% for elver, in 0.1% for young eel, and in 0.5% for Israeli carp. But not shown the effect of lysine in preadult of eel. As a results, it was considered that a amounts of lysine added recommend to fishfeed 0.1% of lysine for elver and 0.5% for Israeli carp.

극소전계전자방출 전류밀도 검출을 위한 센싱 시스템 개발

류정탁,K., Oura,김연보 대구대학교 정보통신연구소 2003 情報通信硏究 Vol.1 No.2

본 연구에서 개발된 전계전자방출 측정 시스템은 FE(field emission) 디바이스 전체에 대한 전기적 특성을 평가할 수 있을 뿐만 아니라 극미소한 영역에 대한 전계적 특성도 측정할 수 있다. 따라서 FE 디바이스의 물리적 및 전기적 특성을 보다 정밀하게 마이크로 단위로 평가할 수 있어 우수한 FE 디바이스의 개발 및 개선에 큰 도움을 줄 수 있다. 또한 이 극소전계전자방출 측정 시스템은 FE 디바이스가 전계에 의해 방출하는 전류밀도를 2차원적 및 3차원적으로 표시가 가능하므로 FE 디바이스의 특성을 직관적으로 평가할 수 있다. In this research, we developed the electric field electron emission measurement system of new form. This system can measure electric field characteristic about a microscopic area as well as all over area of a field emission (FE) device. Therefore, this system can give big help in development and improvement of more superior FE device because of measurement capacity for physical and electric property of FE device about a microscopic area. Also, we can intuitionally evaluate FE device characterization, because this system displays possible two-dimensional and three-dimensional current density emitted from FE device by electric field.

梅泉의 交遊를 통한 意識世界 硏究

柳年錫,黃秀貞 順天大學校 師範大學 附屬 科學敎育硏究所 2002 科學과 敎育 Vol.10 No.-

This study covers the life of "Maecheon Hwang―hyeon", who was one of the last scholars in the Chosum Dynasty, along with his social intercourse. ChapterⅡ summarizes the findings in related to his social intercourse. His social intercourse are divided into two categories in terms of area ; Local area (his home town) and Central area (capital of that time). In kwnagyang he kept company with local scholars, who helped him to consolidate his own unique poetic styles and literary world. ChapterⅢ he kept close relationship with those days' respectable scholars. Through the friendly and beneficial company, he not only got rich in social experiences, but also, he could open the new horizon, through which he became well―known with widely ranged view points of the society. In conclusion, Maecheon, one of the greatest writers, accomplished literary mastery that absorbed the pains of folks those days, along with contribution to upgrading confucian literature.

AI 조성비 변화에 따른 GaAs/AIGaAs 다중양자우물구조 특성변화 연구

유연희,최정우,임재영,노삼규 慶熙大學校 材料科學技術硏究所 1998 材料科學技術硏究論集 Vol.11 No.-

We manufactured and characterized different sets of GaAs/AlGaAs multiple quantum well structures for the long wavelength infrared photodetection. The samples were grown by MBE. We changed the aluminum composition of barrier region from 0.24 to 0.30 in 0.02 steps, and performed double crystals X-ray diffraction(DCXRD) and the photoluminescence measurements. DCXRD measurements correctly gave the expected aluminum compositions. Photoluminescence measurements revealed that the ground state energy of the well increases with composition as desired, but the change was not very significant.

2-2형 압전복합체의 전기적 특성

김연보,류정탁 대구대학교 정보통신연구소 2003 情報通信硏究 Vol.1 No.2

In this study, we have investigated on the development of ultrasonic transducers with 2-2 mode piezocomposites that have better piezoelectric activity and lower acoustic impedance than those of conventional piezoceramics. The piezocomposite ultrasonic transducer can solve the traditional acoustic impedance mismatching problems without the help of matching layers. In this study we have designed optimal material properties of the piezocomposite, and volume fraction and geometric shape of the piezoceramic. The accoustic impedance of 2-2 mode piezocomposite was linearly decreased with PZT volume fraction. The electromechanical coupling factor(kt) was uniformed about 0.68 in the 0.2 to 0.6. When the volume fraction of PZT was 0.2 the accoustic impedance was 3.2 Mrayl.

Dimethomorph의 제형에 따른 고추 역병 방제 효과

박정용,류연주,류나현,이용세 대구대학교 생명과학연구소 2004 생명과학연구 Vol.3 No.1

Dimethomorph(DMM) is an effective Oomycete fungicide useful for the control of late blight of potato and pepper by preventative sprays. Efficacy of five formulations, suspension concentrate (DM150), wettable powder (DM250) and three different dispersible concentrates (DM630, DM631, DM632), were investigated in their biological activity against phytophthora blight of red-pepper in vitro and in vivo. Their in vitro biological activities against mycelial growth, zoosporangial formation and zoosporangial germination of Phytophthora capsici were similar. The incidence of late blight on red pepper plants was progressively increased from June 11 to August 8 in untreated plants. However, in the case of DMM treated plants diseased plants, were increased after July 11. When compared with that on July 11, the incidence of late blight on July 18 in the treated plants except in DM630 were increased drastically. This increase were thought to be the result of flooding with more than 80 mm rainfall at July 15. The incidence of late blight on July 29 in the treated plants were increased compared with that on July 18. These also thought to be the result of flooding with more than 100 mm rainfall on July 23. All of the tested DMM formulations showed similar high control value against the late phytophthora blight on red pepper plants in the field test until July 11. However, after flooding the test field, DM630 showed the greatest disease control efficacy. DM250 showed relatively poor disease control efficacy in the test. Therefore more studies on the DM630 formulation are needed.

무선 기반의 실내 온도 측정 시스템 설계

차부상,정우철,류정탁,김연보 대구대학교 정보통신연구소 2004 情報通信硏究 Vol.3 No.2

최근 홈 네트워크 산업이나 지능형 주거관리 시스템의 필요성과 관심이 증가하고 있다. 이와 같은 분야에서는 무엇보다 효율적인 측정 시스템에 대한 연구가 선행되어야 한다. 따라서 본 논문에서는 센서 측정 시스템 설계에 관한 기초 연구로서 실내 환경에 적합한 온도 측정 시스템을 설계해 보고 그 특성에 대해 나타내었다. 설계한 시스템의 구성은 크게 온도 센서로부터 온도 변화를 검출하는 데이터 획득부, 신호처리를 위한 제어부 그리고 측정된 온도 데이터를 전송하기 위한 RF 송수신부로 나누어진다. 설계된 측정 시스템에 거리변화 및 장애물 유무에 따른 영향을 살펴보고, 안테나 변경에 따른 성능 차이를 살펴보았다. 실험 결과 10m 이내의 실내 환경에서는 본 논문에서 제안하고 설계한 측정 시스템을 사용하여 데이터의 실시간 처리가 가능하였다. 또한 이를 바탕으로 다중 센서 측정 시스템 구현이 가능함을 알 수 있었다. Recently, the need for intelligent sweet home systems and home network industry is increasing. In this field, a study on efficient measurement system is preceded by the other subjects. Therefore, in this paper, a study on efficient sensor measurement system, temperature measurement system suitable for room environment is designed and its property is given. We designed temperature measurement systems consisting of data acquisition part as a temperature sensor, control unit for signal processing and RF moduls for data transmit. The results of experiment showed real-time processing in the room environment within 10 meter. It also showed the possibility of multi-sensors measurement system.

골격근 근형질세망의 ATPase활성도에 대한 Vanillylnonanamide의 영향

박경섭,홍장희,류영수,성지연,허강민,임종호,이재흔,석정호 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.2

To investigate the effect of vanillylnonanamide(VN) on the ATPase activity of the sarcoplasmic reticulum(SR) of the skeletal muscle, we prepared the SR vesicles from the back muscle of the rabbit, and measured ATPase activity. The results as follows: Ca-ATPase activity was about 50% in the total ATPase activity of skeletal muscular SR. In the reaction mixture with calcium, 100μM VN increased ATPase activity to 20%, and 100 nM and 10 μM thapsigargin(THP) inhibited the ATPase activity to 50% and 60%, respectively. And 100 μM VN plus 100 nM or 10 μM THP more inhibited ATPase activity than THP alone did it. However, without calcium, 100μM VN did not affect ATPase activity, and 10 μM THP inhibited it to 41%, but VN plus THP inhibited it to 31%. The above results show that VN in the reaction mixture with or without calcium has the different action to ATPase activity when it is used alone or together with Ca-ATPase inhibitor THP. This suggests that VN might increase or decrease the skeletal SR Ca-ATPase activity through affecting the lipid membrane around the Ca-ATPase.

LPCD법에 의한 Tin박막의 전계 에미터 어레이 제작

조경제,이상윤,류정탁,김연보,이진호 大邱大學校 科學技術硏究所 2001 科學技術硏究 Vol.8 No.2

Using low pressure chemical vapor deposition (LPCVD), TiN thin films as field emitter array were fabricated. In this Work, a method was transfered to a substrate and the wet-etching of the silicon substrate instead of fabricated method of mold shape was using in generally but we have fabricated gated field emitter tips as using mold shape of the new method that using a side wall space structure. Following sequences such as LPCVD method of a gate electrod and gate oxide on a silicon substrate and defesited BPSG thin film as a high temperature was flowed by the mold shape of a sharpen, the TiN as a materials of emitter tips was deposited after was bounded by anodic bonding and the wet-etching of the silicon substrate by using KOII solution, the last have fabricated a gated field emitter arrays of a sharpen. These emitters were estmated by scanning electron microscopy and X-ray diffraction.

LT, Others : PE-133 ; A case of hepatic hemangioma appearing atypical finding confirmed by dynamic MRI in patients with high risk of hepatocellular carcinoma

( Dong Won Park1 ),( Soo Hyung Ryu1 ),( Myung Ki Oh ),( Seong Yeon Jeong ),( Kyeong Sam Ok ),( Jae Chan Shim ),( Jin Nam Kim ),( You Sun Kim ),( Jeong Seop Moon ) 대한간학회 2012 춘·추계 학술대회 (KASL) Vol.2012 No.-

Background: Hemangioma is the most common benign hepatic tumor. Many hepatic hemangiomas tend to be found incidentally, but should be differentiated from malignant tumors. We report an interesting case of hepatic hemangioma in patient who has high risks of hepatocellular carcinoma. Case: A 52-year-old woman, who was a chronic alcoholic abuser and hepatitis C virus carrier with no treatment experience, was admitted due to diarrhea. The patient had suffered from intermittent abdominal pain in the right subcostal area for recent 3 months. Also the patient had easy bruising and frequent epistaxis. She had used oral contraceptives for almost 20 years. Systolic blood pressure was 160 mmHg and diastolic blood pressure was 80 mmHg. Body temperature was normal. Physical examination revealed icteric sclerae and tenderness in right upper quadrant of the abdomen. Laboratory study showed platelet count of 31,000/ul, AST/ALT of 302/127 IU/L, and total bilirubin of 2.7 mg/dl. 3-phased contrast-enhanced abdominal computed tomography (CT) revealed a 4 cm × 4 cm sized hepatic mass involving both segment 5 and 6. Abdominal CT finding suggested hepatic hemangioma, however, typical finding of hemagioma was unclear, therefore, could not rule out the malignancy. Since she had risk factors for hepatocellular carcinoma, abdominal ultrasonography was performed for further evaluation. But abdominal ultrasonography also showed atypical finding. The confirmative diagnosis could be done by dynamic magnetic resonance imaging (MRI) using primovist®, which is an innovative liver cell-specific contrast medium. Dynamic MRI presented peripheral globular enhancement and a centripetal fill-in pattern, confirmatory findings of hepatic hemangioma, on the delayed image. The patient got relief from abdominal pain and diarrhea during admission, now is being followed-up at a general out-patient clinics. Conclusions: Hemangiomas with atypical abdominal CT and ultrasonographic findings in patients with high risks of hepatocellular carcinoma can be easily characterized with primovist-enhanced dynamic MRI.