브루셀라병 혈청검사 양성 수소와 12개월령 이하 소에서의 균 분리 및 동정

류재윤 ( Jae Yun Ryu ),변정운 ( Jung Hyun Bun ),이희영 ( Hee Young Lee ),이용창 ( Yong Chang Lee ),이종진 ( Jong Jin Lee ),송영각 ( Young Gak Song ),남향미 ( Hyang Mi Nam ) 한국동물위생학회 2007 한국동물위생학회지 (KOJVS) Vol.30 No.3

This study was conducted to investigate the characteristics of brucellosis in Korean native cattle in a farm where bovine brucellosis was confirmed 3 times from September 2006 to March 2007. Of 74 bulls serum samples examined, 21(28.4%) were positive by Rose-Bengal test(RBT) and Standard tube agglutination test(STAT). In the isolation test from seropositive bulls, B abortus was isolated and identified from 2 specimens (testis, intestinal lymph node) among 6 kinds of specimens including blood, urine, feces and soil. Isolation rate of intestinal lymph node and testis was 25%(3/12 cases)and 16.7%(2/12), respectively. B abortus was also isolated from calves below 12 months old, i.e., 1 isolate(25.0%) was confirmed from testis, 4(40.0%) from supra-mammary lymph nodes and 1(25.0%) from intestinal lymph node. All isolates had Brucella specific 16s r-RNA with 905-bp band detected byPCR assay. For the more effective control of bovine brucellosis in korea, this paper would like to suggest that all of bulls and calves should be included in the screening tests.

추백리 혈청검사 양성 산란계로부터 Salmonella속균 분리

류재윤 ( Jae Yun Ryu ),전무형 ( Moo Hyung Jun ),장경수 ( Kyung Soo Chang ),손현수 ( Hyun Soo Son ),곽학구 ( Hak Koo Kwak ),박경재 ( Kyung Jae Park ),우용구 ( Yong Koo Woo ) 한국동물위생학회 1999 한국동물위생학회지 (KOJVS) Vol.22 No.3

To investigate the specificity of rapid slide agglutination test for pullorum-gallinarum diseases and to obtain a basic data for avian salmonellosis control, salmonella isolation was performed for the layer chickens positively reacted in pullorum-typhoid agglutination test. The biochemical, serological and antimicrobial properties of the isolates were examined. The results obtained through this study were summarized as follows; 1. Of 2,384 chickens tested by the agglutination test, 606 chickens (25.4%) were positive reactors. 154 of 606 reactors and 49 of the non-reacting chickens were investigated for salmonella isolation, resulting in isolation of 68 strains of salmonellae from 27 chickens. 2. By organs, the isolation frequency from liver, cecum, spleen, ovary and gall bladder showed 8.9% (18 strains), 8.9% (18 strains), 7.4% (15 strains), 4.4% (9 strains) and 3.9% (8 strains), respectively. 3. By culture medium, the combination of selenite broth and MacConkey agar revealed the highest isolation rate and the enrichment culture by delayed secondary enrichment culture method was found the most effective for salmonella isolation. 4. The serotypes of 68 salmonella isolates were identified as 3 strains of S pullorum, 24 strains of S gallinarum, 15 strains of S typhimurium, 8 strains of S enteritidis, 7 strains of S paratyphi A, 5 strains of S infantis and 6 strains of the other salmonellae. 5. The serotypes of 8 salmonella strains isolated from 49 chickens non-reacting in pullorum-typhoid agglutination test were identified as 3 strains of S typhimurium and 5 strains of S infantis. 6. When 24 chickens of which 68 strains of salmonellae isolated were examined by microplate agglutination test, the average antibody titer for pullorum antigen was 2(5.25) The chickens at antibody titer between 2(3) and 2(5) showed the higher frequency of isolation as compared with the chickens at the other titers. 7. When salmonella isolates were tested the antimicrobial drug sensitivity by disk diffusion method, S paratyphi A were highly sensitive by 100% to ATM and GM, S typhimurium, by 88% to AM, CIP, IMP and TM S infantis, by 100% to AM, CR0, ENR and PIP, S enteritidis, by 100% to IMP and PIP, S pullorum, by 100% to ATM, CR0, ENR and PIP and S gallinarum, by 92% to CR0, CIP and PIP.

국내산 낙엽송의 톱밥 유형에 따른 펠릿특성에 관한 연구

류재윤 ( Jae Yun Ryu ),강찬영 ( Chan Young Kang ),이응수 ( Eung Su Lee ),서준원 ( Jun Won Seo ),이현종 ( Hyun Jong Lee ),박헌 ( Heon Park ) 한국목재공학회 2010 목재공학 Vol.38 No.1

로봇파노라마헤드와 스티칭 기법을 활용한 기가픽셀 이미지의 생성과 기가픽셀카메라 기술

최연찬,문희준,김동영,류재윤,신예랑,임천석,Choi, Yeon Chan,Moon, Hee Jun,Kim, Dong Young,Ryu, Jae Yun,Shin, Ye Rang,Rim, Cheon-Seog 한국광학회 2015 한국광학회지 Vol.26 No.1

현재의 이미지 센서기술은 메가픽셀 급에 한정되어 있는데 메가픽셀 급의 이미지 센서로 기가픽셀의 이미지를 생성하기 위해서는 필수적으로 중첩영역의 이미지를 하나로 합성하는 스티칭(stitching) 기법을 쓸 수밖에 없다. 본 논문에서는 로봇파노라마헤드와 스티칭 기법을 사용하여 기가픽셀카메라 기술의 전 과정을 탐구해 보았다. 그리고 이 과정을 통해서 얻어진 경험이나 이해를 바탕으로 듀크대와 BAE의 기가픽셀카메라 기술에 대해서도 설계해석을 시도해 보았다. 또 나아가, 새로운 기가픽셀카메라의 광학구조에 대한 모색도 시도해 보았다. 기가픽셀카메라 기술에서는 스티칭 작업과는 별도로 먼거리의 피사체 혹은 대기오염과 같은 원인으로 발생하는 흐릿한 영상부분을 보정하는 것이 필수적이라는 것도 파악되었다. Since the technology of current image sensors is limited to the megapixel class, it is necessary to use an image-stitching technique to create a gigapixel image from hundreds or thousands of photos taken by a megapixel image sensor. In this paper, we investigate the entire process of gigapixel camera technology employing a robotic panoramic head plus a stitching technique, and analyze the gigapixel camera technologies of Duke University and BAE Systems from the viewpoint of optical design structure. Hopefully this knowledge will lead to a new optical structure for a gigapixel camera. Meanwhile, we also perceive the need for additional image processing to reduce the noise of photos with a background of fog and mist, taken far from the camera lens.

인도네시아산 White Jabon과 Red Jabon의 해부학적 특성 비교

김종호 ( Jong Ho Kim ),장재혁 ( Jae Hyuk Jang ),류재윤 ( Jae Yun Ryu ),황원중 ( Won Joung Hwang ),( Fauzi Febrianto ),김남훈 ( Nam Hun Kim ) 한국목재공학회 2013 목재공학 Vol.41 No.4

Anatomical characteristics of White Jabon (Arthocephalus cadamba) and Red Jabon (Arthocephalus macrophyllus) were investigated by IAWA hardwood feature list. Both species were diffuse-porous, and radial multiple pore with 2∼3 rows was mostly observed. Tangential diameter of vessel lumina was 100 to 200 μm, and vessels per square millimeter were 5 to 20. White Jabon has more vessels than Red Jabon. The number of solitary pore per square millimeter in both species was similar, but more pore multiple was observed in White Jabon. Axial parenchyma diffuse was observed in both species, but axial parenchyma of White Jabon was hardly identified on the cross section. Rays were classified into “body ray cells procumbent with over 4 rows of upright/square marginal cells” type and partly “all ray cells upright and/or square” type on radial section. Ray width 1 to 3 cells and 1 to 2 cells observed in White Jabon and Red Jabon, respectively. Ray height of White Jabon was 420㎛ and Red Jabon 474㎛. Fiber length was the range of 900 to 1,600㎛ in both species, and it showed a tendency to increase from pith to bark. Consequently, it is considered that pore multiple, ray width and axial parenchyma are to be suggested the keys for identification of both species.

Porcine circovirus에 대한 항체가 조사 및 바이러스 항원 확인

강신석 ( Shin Seok Kang ),박재명 ( Jae Myung Park ),이종진 ( Jong Jin Lee ),류재윤 ( Jae Yun Ryu ),최해연 ( Hae Yeon Choi ) 한국동물위생학회 2001 한국동물위생학회지 (KOJVS) Vol.24 No.2

Porcine circoviruses(PCV) are the smallest nonenveloped DNA viruses containing a unique single-stranded circular genome. No recognized link was found between PCV infection of pig and disease. But the PCV consistently identified from post weaning multi systemic wasting syndrome(PMWS) and researches indicate that there are strong relationships between PCV and PMWS. Clinical signs were emaciation, dyspnea, high fever with normal appetite. Necropsy findings showed respiratory disease complex lesion and lymph node anomalities. An indirect-immunofluorescent antibody procedure was used to assay swine sera for the presence of PCV antibodies. Antibodies against PCV were found in an average of 20% of the samples tested. The PCV DNA was amplified from lymph nodes collected from pigs. PCV specific primers were successfully amplified DNAS. Further studies are needed to determine the possible role this virus might have in disease.

인도네시아산 주요 조림 및 유망 수종의 물리적 및 역학적 특성(I)

김종호 ( Jong Ho Kim ),장재혁 ( Jae Hyuk Jang ),류재윤 ( Jae Yun Ryu ),황원중 ( Won Joung Hwang ),감남훈 ( Nam Hun Kim ),( Fauzi Febrianto ) 한국목재공학회 2014 목재공학 Vol.42 No.4

The physical and mechanical characteristics of 10 Indonesian wood species were investigated. Mangium, Gandaria and Rambutan showed higher density. Mangium, Gandaria and Mangga appeared lower in shrinkage, and the ratio of tangential/radial was low in Albizia, Kupa and Mangga. The compression strength parallel to the grain and hardness were high in Mangium and Nangka. Gmelina, Mangium, Gandaria, Kupa, Nangka and Rambutan had valuable propertiesfor commercial wood materials. Consequently, it is considered that the results of this study could be useful basic data for the improved use of planted and promising species in Indonesia.

오존 처리한 폐식용유의 화학구조와 pMDI로 제조한 접착제의 목재 접착강도

강찬영 ( Chan Young Kang ),이응수 ( Eung Su Lee ),류재윤 ( Jae Yun Ryu ),이현종 ( Hyun Jong Lee ),서준원 ( Jun Won Seo ),박헌 ( Heon Park ) 한국목재공학회 2010 목재공학 Vol.38 No.4

The research attempted to develop a wood adhesive based on waste cooking oil, using ozonification technology for the chemical structure modification. The waste cooking oil (WCO) was reacted with O3 for different times; 1 h, 2 h, and 3 h. The chemical structure modifications of the ozonized WCOs were examined by Fourier transform Infrared (FT-IR) spectrum. The FT-IR spectrum of WCO had an absorbance peak at 3,010 cm-1 that was the characteristic peak of the unsaturated double bonds. As ozone treatment time increased, the peak of the double bond was disappeared and carboxyl peak appeared at 1,700 cm-1. Especially, the double bond of 3 hrs-ozonized WCO was vanished almost. In results of the dry bonding strengths of the 3 hrs-ozonized WCO mixed with polymeric methylene diphenyl diisocyanate (pMDI) were the strengths of weight ratio of 3hrs-ozonized WCO:pMDI, 1:0.5, 8.08kgf/cm2, 1:0.75, 9.53kgf/cm2 1:1, 44.16kgf/cm2, 1:2, 58.08kgf/cm2, 1:3, 61.41kgf/cm2, and 1:4, 46.95kgf/cm2. Therefore, it was found that the optimum equivalent ratio was formed at the ratio of 1:2 or 1:3. Under wetting the bonding strength of 1:3 ratio was appeared higher than that of 1:2 ratio, while the results obtained from hot-water and cyclic boiling shear test were similar.

인사이징 처리 낙엽송 CCA-방부원주목의 강도 성능 평가

박준철 ( Jun Chul Park ),김상우 ( Sang Woo Kim ),류재윤 ( Jae Yun Ryu ),홍순일 ( Soon Il Hong ) 한국목재공학회 2008 목재공학 Vol.36 No.3

Kraft Pulp 폐액을 이용한 합판용 요소 Ligning 접착제 연구

류재윤,이화형 한국목재공학회 1988 목재공학 Vol.16 No.2

接着劑 製造를 위하여 펄프 廢液중의 리그닌을 利用하는 硏究가 1930年傾부터 進行되여 아황산 펄프 廢液중의 Lignosulfonate의 경우는 페놀 樹脂나 尿素樹脂에 增量시키거나 反應시키는 硏究인데 비하여 kraft 리그닌을 利用하는 경우는 페놀 樹脂의 報文이 主流를 이루고 있으나 尿素系 共縮合樹脂는 아직 發表된 바 없으며 또한 아직까지 리그닌을 利用한 商業的인 接着劑가 製造되어 活用되지 못하고 있는 實情이다. 따라서 本 硏究는 合板製造의 原價節減, 廢液利用의 環境保存觀點에서 Kraft Pulp 廢液중의 리그닌을 Urea-Fonnaldehyde와 共縮合反應시켜 現在 尿素樹脂보다 良好한 接着强度를 지닌 요소-리그닌 接着劑의 製造하고져 實施하였으며, Urea-Lignin接着劑의 塗布量은 一般的으로 合板에 塗布되는 尿素樹脂의 量(320q/㎡)과 同一하고 壓搾壓力은 均一하게 12㎏/㎠으로 하여 熱壓條件(溫度, 時間)의 影響을 아울러 糾明하였다. Urea-Formaldehyde와 Kraft lignin의 混合比는 重量比(N.V.C)로 7:3으로 合成樹脂를 만들어 合板製造를 通하여 究明를 結果 다음과 같은 結論을 얻었다. 1. 本 實驗의 結果 尿素樹脂의 約 30%가 kraft lignin으로 代替 할 수 있음을 보여준 바, Pulping 工程의 副産物로 얻어진 廢液은 合板製造時 接着劑의 代替源으로 有效하다. 2. 經濟的觀點에서 合板製造를 위한 最適熱壓條件은 160℃에서 3分으로 壓搾하는 것이 適切하였다.(常態 : 16.49㎏/㎝, 耐水 : 18.56㎏/㎝, 耐溫水 : 12.53㎏/㎝) 3. 요소-리그닌 接着劑로 製造된 合板의 剪斷引張强度는 良好한 接着力을 나타냈으며, 耐水接着力(30℃에서 3時間 沈積後 試驗)은 常態接着力과 별차이가 없거나 더 높은 引張强度力을 보여준 바, 耐水合板用 接着劑로 상당한 展望을 나타냈다.