야생차의 생육특성에 관한 연구

고영옥,이종옥,최주호,정영섭,이용호 진주산업대학교 농업기술연구소 2003 農業技術硏究所報 Vol.16 No.-

본 시험은 최근 각광 받고있는 차나무의 우량품종 육성과 재배에 관한 기초자료를 구명코자 2001년 3월부터 2002년 10월까지 남부지방 자생차의 지리적·생태학적 특성 조사와 RAPD 유연관계를 비교 분석하였으며 그 결과는 다음과 같다. 1. 녹차 자생지 토양의 pH는 4.1 ~ 6.2로 내대리가(pH 6.2) 가장 높았으며, 다사리가 pH 4.1로 가장 낮았다. 2. P_(2)O_(5)는 농업기술원과 다솔사 차가 319㎎/㎏ 이상으로 가장 높았고, 송광사와 다압리는 20㎎/㎏ 이하로 가장 낮았다. 3. 차 포장의 지형은 혜산서원, 농업기술원을 제외한 대부분 자생지가 해발 220m 이상의 산간지 였으며, 북서풍을 막을 수 있는 남향 또는 남서방향이었다. 4. 순천시 송광사, 사천시 배방사, 다솔사, 밀양시 혜산서원, 고성군 옥천사, 남해군 보리암 차엽은 yabukita 보다 대엽이었다. 5. 엽장은 다솔사가 13.9㎝로 가장 길었고 도심다원은 5.2㎝로 가장 짧았으며, 엽폭은 배방사가 4.9㎝로 가장 넓었으며 매암다원이 2.1㎝로 가장 좁았다. 6. 거치수는 배방사가 79개로 가장 많았으며 천은사가 50개로 가장 적었다. 7. 증폭된 DNA의 band pattern을 비교해 보면 절편 크기는 300~3000bp사이였고, 지역별 band 영상은 뚜렷하였다. 8. Primer별 평균 band수는 7.6개였으며, 22개 Primer당 전체 band 수는 76~192개 범위였다. 9. RAPD UPGA에 의한 유연관계 분석을 위한 similarity matrix값에 근거하여 유연성 분석을 실시한 결과 차가 유전적 거리지수 0.10이내에 우선적으로 유집되었으며, 고성군 옥천사, 밀양시 혜산서원, 엄광사 수집종은 0.25의 유전적 거리지수로 유집되었으며 모두 대엽이었다. This study was carried out to investigate the geographical and ecological characteristics of self-sown teas in the southern southern part of South Korea and evolutionary relationship based on the RAPD analysis data. Each sample was collected from March, 2001 to October, 2002 along with basic characteristics of its cultivation. The results are described as follow : 1. The pH of soils in the habitat of collected green teas were 4.1~6.2. The highest pH(6.2) was shown from the soil of Naedae-ri while that of Dasa-ri showed the lowest pH value. 2. The highest content (319㎎/㎏) of P_(2)O_(5) was examined from the tea of the Agricultural Research Extension Services (ARES) while the lowest values were obtained from the collected samples of Shonggwansa and Dasa-ri (20mg/kg). 3. In terms of geographical aspects, most of the areas that samples were collected are mountains with 220 meters above the sea level and are in the direction of the southern exposure and the southeast except Hyesan lecture hall and ARES.4. In Shonggwangsa of Shunchon-si, Baebangsa and Dasolsa of Sacheon-si, Hyesan lecture hall of Miryang-si, Okcheon-sa of Goseong-gn and Boriam of Namhae-gn, the self-sown teas were a kind of bigger size of leaf than that of Yabukita. 5. The tea of Dasolsa had the longest leaf of 13.9㎝, but the tea of Dosim tea plantation had the shortest leaf of 5.2㎝. Baebangsa showed the broadest leaf width of 4.9㎝, and Maeam tea plantation showed the narrowest leaf width of 2.1㎝. 6. The tea of Baebangsa had 79 serrations of the largest number but Cheoneunsa had 50 serrations of the smallest number. 7. When the band pattern of the amplified DNA by PCR were compared, a size of the bands was between 300 and 3,000bp. The band image by area of gathering seeds was distinct. 8. There were the average number of 7.6 bands per primer. The number of total bands per 22 Primers were between 76 and 192 bands. 9. The result values of a flexibility analysis based on a similarity matrix value for the flexible relation analysis by RAPD UPGA, were attracted within 0.10 of inherited distance index. The collected species in Okcheonsa of Goseong-gn, Hyesan lecture hall and Eomgwangsa of Miryang-si were attracted within the inherited distance index of 0.25 and were all the kind of the big leaf.

생체용 Ti₁-x-Zrx합금의 기계적 성질과 내부식성

정종현,백승남,노학,고영무 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.1

While titanium and its alloys has been well studied for a long time, new interest in these materials and their properties has arisen in recent years with respect to their application as biomedical metallic materials. For practical purposes, the following performances are essential for biomaterials. (1) low specific gravity (2) high corrosion resistance (3) good biostability and biocompatibility (4) sufficient mechanical properties (5) non-toxicity To develop biomedical implant materials having all the properties mentioned above, new titanium-zirconium alloys were prepared in this study. Mechanical properties and corrosion resistance were then investigated for as-cast and as-homogeneized Ti₁_x-Zrx alloys in order to reveal their possible use for biomaterials. From the experiments, the following results are obtained: 1. No martensite structure are observed in the specimens made of pure Ti and Zr. In contrast them, Ti-Zr alloys containing 18wt%Zr, 24wt%Zr and 48wt%Zr show a kind of martensite structure regardless heat treatment. 2. Fineness of structures for as-cast-alloys seems to vary with alloy composition. Ti-Zr alloy containing 48wt%Zr shows the finest microstructure. 3. Hardness of Ti-Zr alloys shows continuous change through the system and the alloys containing 48 to 60wt%Zr indicate higher hardness compared with those of pure Ti and other alloys. It is well known that hardness is usually changed with substitutional atoms, and effect of solute atom on hardness is greatest with an equi-atomic composition. The greatest hardness which was obtained in Ti-Zr alloys containing 48 to 60wt%Zr is therefore reasonable. Also, enhanced hardness can be explained on elastic interaction between dislocation and substitutional solute atoms in crystal structure and on fineness of structure. 4. Pure Ti and Zr alloys containing 6wt%Zr, 12wt%Zr, 18wt%Zr, 36wt%Zr show better corrosion resistance compared with those of pure Zr, stainless steel(SUS 316L) and the Ti-Zr alloy containing 48wt%Zr. 5. Comparing hardness, microstructure and corrosion of Ti₁_x-Zrx alloys, no large differences between as-cast and as-homogenized alloys are seen.

치과용 자성 어태치먼트 재료의 안정성 개선에 관한 연구 : II.질화티타늄 코팅이 치과용 자성재의 내식성에 미치는 영향 Ⅱ.Effect of TiN Coating on Corrosion Resistance of Dental Magnetic Materials

최한철,고영무,정재헌,신종연,김일선,최성욱,정효수 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.4

Dental magnetic materials have been applied to removable prosthetic appliances, maxillofacial prostheses, obturator and dental implant but they still have some problems such as low corrosion resistance in oral environments. To increase the corrosion resistance of dental magnetic materials, surfaces of Sm-Co and Nd-Fe-B based magnetic materials were plated with TiN and then electrochemical corrosion test were performed in 4 kinds of electrolyte solutions(0.9% NaCl. 1% lactic acid, 0.05% HCl and modified Fusayama's artificial saliva). From this study, corrosion behavior, amount of elements released, mean average surface roughness values and the changing of mean surface microhardness values were measured comparing with control group of non-sputtered plating magnetic materials. The results were as follows: 1. TiN layer coated on magnet grows into preferred direction with lamellar structure and its thickness is 3.0㎛. 2. Sm-Co base magnetic materials coated with TiN have good corrosion resistance in 1% lactic acid and their pitting corrosion can not be seen. 3. Nd-Fe-B base magnetic materials coated with TiN showed good tendency of corrosion resistance in 0.05% HCl solution. 4. The amount of elements released from both Sm-Co and Nd-Fe-B base magnetic materials coated with TiN were more significantly decreased than that of uncoated magnetic materials. 5. The mean surface roughness values of both Sm-Co and Nd-Fe-B base magnetic materials coated with TiN were smooth than that of uncoated magnetic materials after corrosion test. 6. The decreasing rate of microhardness of both Sm-Co and Nd-Fe-B base magnetic materials coated with TiN were lower than that of uncoated magnetic materials after corrosion test. 7. Dental magnetic materials coated with TiN produced various corrosion products such as TiO, TiO₂, Ti₂O₃on the surface and resulted in better corrosion resistance than uncoated magnetic materials. In conclusion, it is considered that the corrosion problem of dental magnetic materials could be solved to some extent by EB-PVD with TiN on the surface of dental magnetic materials.

Plyometric Training과 비타민 C 투여가 남고생의 체력, 혈중 젖산, 암모니아 및 젖산탈수소효소에 미치는 영향

장준원,김세종,이현미,서혜림,조현숙,고정림,염종우,예정복,백영호 釜山大學校 附設 體育科學硏究所 2003 體育科學硏究所 論文集 Vol.19 No.-

The purpose of this was to examine the effect of plyometric training and vitamin C ingestion on physical fitness and fatigue substance....

에어포일 전면 곡률에 따른 RCS와 공력특성에 대한 초도연구

고영종(Yeong-Jong Ko),김성록(Sung-Rok Kim),김찬우(Chan-Woo Kim),이동언(Dong-un Lee),윤유정(Yu-jung Yoon) 한국항공우주학회 2018 한국항공우주학회 학술발표회 논문집 Vol.2018 No.11

시변 환경에서 점대점 무선통신시스템이 공존할 때 다중 입출력 무선 전력 전달

고영우(Yeong-Woo Ko),문영식(Young-Sik Moon),김호연(Ho-Youn Kim),윤종윤(Jong-Yoon Yoon),탁준우(Jun-Woo Tak),노종선(Jong-Seon No) 한국통신학회 2015 한국통신학회 학술대회논문집 Vol.2015 No.11

Recurrent Exercise-induced AKI Associated with Both Renal Hypouricemia and Rhabdomyolysis (초)

( Seung Yeong Ko ),( Jong Hyeok Jeong ),( Sang Don Na ),( Ju Yeong Kim ),( Jong Hyo Lee ) 대한내과학회 2012 대한내과학회 추계학술대회 Vol.2012 No.1

A Case of Rhbadomyolysis Associated with Refeeding Syndrome (초)

( Ju Yeong Kim ),( Jong Hyeok Jeong ),( Seung Yeong Ko ),( Sang Don Na ),( Jong Hyo Lee ) 대한내과학회 2012 대한내과학회 추계학술대회 Vol.2012 No.1

A new mid-late maturing rice variety「Subo」with a good grain quality and for direct seeding

Man-Kee Baek,Woon-Chul Shin,Jong-Cheol Ko,Bo-Kyeong Kim,Jeong-Kwon Nam,Ki-Yeong Kim,Mun-Sik Shin,Ki-Yong Ha,Hyeon-Su Park,Hyeon-Jung Kang,So-Hyun Baek,Young-Jun Mo,Jae-Kwon Ko,Woo-Jae Kim,Young-Bok Le 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07

‘Subo’ is a new japonica rice variety developed by a cross breeding between HR21124-B-59 and HR19567-B-70-3 having a good Phenotype with a multi-resistance and high yield elite line. The new variety developed for direct seeding by the rice breeding team in Rice Breeding and Cultivation Research Division, Department of Rice and Winter Cereal Crop, NICS, RDA in 2012. The heading date of this variety is August 13 and earlier than that of check variety, Nampyeongbyeo, by two days. ‘Subo’ has 72cm of culm length and 104 spikelets per panicle in direct seeding cultivation. This variety showed resistance to bacterial leaf blight and rice stripe virus and have germinating ability in sumerged soil conditions. The milled rice of this variety exhibits translucent and very clear non-glutinous endosperm. ‘Subo’ has much better palatability of cooked rice than that of Nampyeongbyeo. The whole grain rate of milled rice are 86.9% and milled rice recovery of are 74.6%. The yield of ‘Subo’ in direct seeding cultivation is 5.55MT/ha in milled rice. ‘Subo’ could be adaptable to the southern part plain area of Pyeongtaek and southwestern in Korea.

Diagnostic efficacy of ultrasonography combined with clinical findings in epidermal cyst

( Jong Heon Park ),( Jae Yeong Jeong ),( Ko Eun Kim ),( Sook In Ryu ),( Hwa Jung Ryu ),( Il-hwan Kim ) 대한피부과학회 2020 대한피부과학회 학술발표대회집 Vol.72 No.1

Background: Epidermal cyst is a slow-growing, palpable mass that often have a central punctum and contain debris consists of keratin and cholesterol. On ultrasonography, they often presents typical findings such as well-circumscribed mass, avascular mass and posterior acoustic enhancement. In addition to the clinical examination, ultrasonographic evaluation of the epidermal cyst helps improve diagnostic reliability. Objectives: To analyze the efficacy of ultrasonography for the diagnosis of the epidermal cyst Methods: We examined the clinical database of 35 patients in Korea University Ansan Hospital within 5 years who received ultrasonographic evaluation and had a histopathologic diagnosis after skin biopsy or surgical removal. The sensitivity and specificity of the diagnosis agreement rates before and after ultrasound were calculated. Results: On ultrasound, characteristic features were wellcircumscribed( 94.2%), heterogeneously echogenic(94.2%), anechoic(5.7%), ovoid shape(88.5%), lobulated shape(5.7%), spherical shape(5.7%), internal debris(60%), posterior acoustic shadow(74.2%), absence of doppler flow(85.7%). Considering clinical findings only, 24 cases(68.5%) were consistent with pathology(sensitivity 92.3%, specitivity 55.5%). After clinical and ultrasound evaluation, 28 cases (80%) were consistent with pathology(sensitivity 93.3%, specitivity 100%). Conclusion: In our study, using ultrasound in the diagnosis of epidermal cyst improves sensitivity and especially specificity.