생체용 Ti합금의 양극분극특성에 미치는 Zr 및 Pd의 영향

정종현,이길홍,최칠남,노학,백승남,이상열 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.2

The corrosion resistance of Ti-Zr-Pd-Cr alloys were investigated in order to reveal their possible use for new biomedical implant materials. Titanium alloys consisting of 10∼20%Zr, 0.0∼0.4%Pd and 0.15%Cr were prepared by vacuum arc-melting as alloying elements instead of using hardness Al and V in response to recent concerns about the long term safety of Ti-6%Al-4%V ELI alloys. The Ti-Zr-Pd-Cr alloys were heat-treated at 1000℃ for 2hrs under a vacuum atmosphere. The effect of Zr and Pd Ti alloys on the corrosion resistance for biomedical implant was investigating the anodic polarization curve at 37℃ in 5%HCI solution deaerated by high-purity N₂gas bubbling. The critical current density for passivation(I ) of Ti-Zr-Pd-Cr alloys didn't reveal markedly. Passive current density(I ) at 1.0V vs. SCE of this alloys decreased with increasing Zr in the contents from 10 to 20% and decreased with containing Pd in the range from 0.2 to 0.4%. Potential(E ) at 0.1A * m-² of this alloys increased with increasing Zr in the contents from 10 to 20% and increased with containing Pd in the range from 0.2 to 0.4%. For the Co-30%Cr-6%Mo alloy, passivity zone is narrow, and rapid increase of current density result from the low potential in comparison with Ti and Ti alloys. The corrosion resistance by the anodic polarization of Ti-20%Zr-0.2%Pd-0.15%Cr alloy was found to be superior to those of the Ti, Ti-6%Al-4%V alloy and Co-30%Cr-6%Mo alloy. The passive films formed on the Ti-20%Zr-0.2%Pd-0.15%Cr and Ti-6%Al-4%V alloys in the anodic polarization test consist mainly of TiO₂, Ti compound, ZrO₂, Al₂O₃and V₂O₃.

釜山市 主要公園의 野鼠類의 生態에 관한 硏究

南廷七,朴承範,權相洙,李幸烈 東亞大學校 1987 東亞論叢 Vol.24 No.1

This experiment was conducted in the three areas of the main park in pusan for four times from March to July, 1987, in order to protect forest injury of field mice. The results were obtained as follow; 1. The species of field mice were Apodemus agrarius coreae, Apodemus speciosus peninsulae, Clethrionomys rufocanus regulue and Crocidura suaveolens shantungensis. 2. Total of 42 field mice collected were composed with 52.4% in Apodemus speciosus peninsulae 30.9% in Crocidura suaveolens shantungensis. 11.9% in Apodemus agrarius coreae, and 4.8% in Clethrionomys regulue. 3. The 42 indivisals of field mice were collected from 1,472 traps. 4. The locational proportions of field mice collected were 1.4%,, 3.8% and 3.5% in Stations, Ⅰ,Ⅱ and Ⅲ, respecrively. 5. Apodemus speciosus peninsulae and Clethrionomys rufocanus regulue was not collected at the station Ⅰ. 6. The body weight ranged from 22 to 39.9g in Apodemus agrarius coreae, from 12 to 45.9g in Apodemus specious peninsulae, from 22 to 33.9g in Clethrionomys rufocanus regulue, It's average weight was 29.8g in Apodemus coreae and Apodemus Speciosus Peninsulae, and 27.8g in Clethrionomys rufocanus regulue, 7. The ratio of female to male of field mice was 0.6 to 0.4 in Apodemus agrarius coreae, 0.41 to 0.59 in Apodemus speciosus peninsulae, and 0.54 to 0.46 in Clethrionomys rufocanus regulue. 8. The average body length of field mice was 97.8mm in Apodemus agrarius coreae, 97.14mm in Apodemus speciosus peninsulae, and 101.5mm in Clethrionomys rufocanus regulue. 9. The average tail length of field mice was 78.2mm in Apodemus agrarius coreae, 95.23mm in Apodemus speciosus peninsulae, 35.0mm in Clethrionomys rufocanus regulue. 10. The average ear length of field mice was 14.3mm in Apodemus agrarius coreae, 15.77mm in Apodemus speciosus peninsulae, 14.0mm in Clethrionomys rufocanus regulue. 11. The breeding period of field mice was between March and July in pusan area. 12. average fetal number of field mice was 3.0 in Apodemus agrarius coreae, 4.8 in Apodemus speciosus peninsulae, and 4.5 in Crocidura suaveolens shantungensis.

各種 植物生長調節物質의 生檢法에 關한 硏究 : Ⅱ. 綠豆發根에 미치는 環境條件, 摘葉 및 核酸複合調味料 아이미의 效果 Ⅱ. Effects of Environmental Conditions, Leaf. Removal, and Aimi on the Rooting of Mungbean Cuttings

李政明,沈相七,金武成 경희대학교 부설 식량자원개발연구소 1981 硏究論文集 Vol.2 No.-

Experiments were conducted to find out the effects of environmental conditions and some other factors influencing the rooting and growth of mungbean cuttings in 1980 and 1981. More roots were formed in the cuttings grown under high light intensity. However, the effect of auxin(indole butyric acid) was more apparent under led light intensity condition. Removal of the growing point significantly increased the root number, but the removal of 1/2∼1 leaf did not influence the root number. The food seasoning material, Aimi(99.5% sodium-L-glutamate and 0.5% sodium-5'-ribonucleotide), showed auxin-like activities.

암남공원의 식물상과 삼림식생에 관한 연구

남정칠,박승범,김승환,강영조,이기철,이정아 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.1

The objective of this study is to analyze the flora and forest vegetation of Amnam urban natural Park. 10 transects of quadrat of 10×10m were selected for the experiment. They were surveyed from January to October 1997. The obtained results were summerized as follows ; 1. The flora of plants distributed in Amnam Park was 88 families, 245 genus, 374 species. Dicotyledom in an angiosperm was 81.3% of total percentage was 73 families, 194 genus, 304 species, Monocotyledonous plant was 13.9% of total percentage was 7 families, 38 genus, 52 species, Gymnospermous plant was 2.1% of total percentage was 4 families, 5 genus, 8 species. Pteridophyta was 2.4% of total percentage was 3 families. 7 genus, 9 species, Shave grass was 0.3% of total percentage was 1 family, 1 genus, 1 species. 2. The representative wood plants of Amnam Park were Pinus thunbergii, Machilus thunbergii, Camellia japonica, Quercus spp., Celtis sinensis, Morus bombysis, Prunus sangentii, Sorbus alnifolia, Albizzia julibrissin, Juniperus rigida, Platycaya strobilacea, Lespedeza spp., Zanthoxylum piperitum, Zanthoxylum schinifolium, Rhus spp., Carpinus coreana, Mallotus japonicus. Ficus erecta, Pittosporum tobira, Eurya japonica. Elaeagnus macrophylla. 3. The area of plant community in Amnam Park was 84.29% in Pinus thunbergii community. 6.7% in Quercus dentata-Celtis sinensis community, 1.5% in Pittosporum tobira-Eurya japonica community, 1.4% in Quercus aliena-Prunus sargentii community, 1.29% in Pinus thunbergii-Pittosporum tobira community, 1.27% in Pinus thunbergii-Eurya japonica community.

全南地域의 鳥類現況調査

南廷七 동아대학교 환경문제연구소 1990 硏究報告 Vol.13 No.1

These surveys were conducted in the eight areas of Chonnam province form April 1987 to September 1987 in order to study the present condtion of birds. The results were obtained as follows : 1. A total of 4,396 birds were observed, which composed of 82 species. 2. A dominant species were composed with 17.04% in Passer montanus dybowskii, 9.03% in Paradoxornis webbianna fulvicauda, 6.19% in Phasianus colchicus karpowi. 3. The birds observation area of most numerous are Gwang-Ju area. A total of 1,999 birds were observed, which composed of 44 species. 4. A natural monument birds of observation are Falco tinnunculus interstinctu and Accipiter soloensis. 5. Pica pica sericea and Anas poecilorhyncha zonorhycha are not find.

어린이대공원 들쥐류의 生態에 관한 硏究

南廷七,朴承範,李其哲 東亞大學校 建設技術硏究所 2004 硏究論文集 Vol.27 No.2

This study was conducted four ecological survey of field mice of the Children's Grand Park in Busan Metropolitan city from June, 2002, to March, 2003 for the understanding of field mice damage to forest. The results are obtained as follows. 1. The species of field mice collected were Apodemus agraius coreae, Apodemus speciosus peninsulae and Clethrionomys rufocanus regulus and Crocidura suaveolens shantungensis of insectvore. 2. The total collecting rate were 3.6% collected 43 individuals of field mice from 1191 trap. 3. The rate among the 43 field mice collected were 76.7% in Apodemus speciosus peninsulae. 11.6%in Clethrionomys rufocanus regulus, 7.0% in Crocidura suaveolens shantungensis and 4.7% in Apodemus agraius coreae. 4. The constitution of weight of field mice was 30-35g in Apodemus agraius coreae, 18-45.9g in Apodemus speciosus peninsulae. 22-43.9g in Clethrionomys rufocanus regulus and 5-6g in Crocidura suaveolens shantungensis. 5. The ratio of male to female of field mice was 50% : 50% in Apodemus agraius coreae, 45.5% : 54.5% in Apodemus speciosus peninsulae. 60% : 40% in Clethr-ionomys rufocanus regulus and33.3% : 66.7% in Crocidura suaveolens shantungensis. 6. The average body lengh was 105.2mm in Clethrionomys rufocanus regulus. 100.5mm in Apodemus agraius coreae, 97.42mm in Apodemus speciosus peninsulae and 59.0mm in Crocidura suaveolens shantungensis. 7. The average tail lengh was 95.64mm in Apodemus speciosus peninsulae, 83.5mm in Apodemus agraius coreae, 41.0mm in Crocidura suaveolens shantungensis and 38.6mm in Clethrionomys rufocanus regulus. 8. The breeding period of field mice in the children's grand park presumes from about the early of March to end of October. 9. The average fetal number of field mice was 4.3 in Apodemus speciosus peninsulae and 4.0 in Clethrionomys rufocanus regulus.

쌍발 복합재 항공기의 세로 안정 미계수 추정

김칠영,이정모,은희봉,신충화,황명신 한국 항공대학교 항공산업기술연구소 1997 航空宇宙産業技術硏究所 硏究誌 Vol.7 No.-

본 연구의 목적은 비행시험으로부터 항공기의 동적 세로 안정 미계수를 결정하는 것이다. 일반적으로 미계수를 결정하는 방법은 풍동시험 방법, 분석적 방법 그리고 비행시험 방법등으로 나누어진다. 앞의 두가지 방법은 미계수 추정에 있어 많은 제한을 갖고 있으며 추정된 미계수의 유효성에도 문제가 있다. 따라서 비행 시험은 가장 정확한 미계수를 얻을 수 있는 방법이며 반드시 필요한 절차이다. 쌍발 복합재 항공기의 비행시험을 통해 자료를 획득하였고 최대공산법을 이용하여 세로 조종/안정 미계수를 추정하였다. 추정된 미계수를 이용하여 항공기의 운동을 시뮬레이션하여 실제 시험자료와 비교하여 좋은 결과를 나타냄을 알 수 있었다. The purpose of this paper is to find how to determine the longitudinal controllability and stability derivatives from flight test and to display the longitudinal stability of the Twinbee aircraft. There are various methods developed to find the derivatives : wind tunnel testing, predicted result from empirical data, flight test and so on. Among those methods, the estimation from flight test of real aircraft is the most reliable. We performed the flight test of Twinbee and recorded the states of aircraft. Using those states and parameter estimation algorithem based on the Maximum Likelihood (MMLE) criterion, we can estimate the controllability and stability derivatives. In this paper, we will show the process from designing the proper flight test input to estimation of derivatives.

거대요관과 거대방광이 동반된 선천성 신성요붕증 1예

이은정,이규백,서정열,김향,박흥재,김영학,권칠훈,이영래 대한신장학회 2001 대한신장학회잡지 Vol.20 No.4

釜山市 街路樹의 大氣汚染物質 및 鹽分의 濃度에 관한 硏究

남정칠,문추연,박승범 東亞大學校生命資源科學大學附設 農業資原硏究所 1996 農業生命資援硏究 Vol.5 No.1

This study was to investigate the element of SO₂, Pb, Zn, Cu, Fe, Mn, Cd and the NaCl concentration in the leaves. The object of this study was Ginkgo biloba, Pinus thunbergii, Platanus occidentalis, Pruns yedoensis and camellia japonica, and these were planted in the city of Pusan. The study considered such factors as the sort of the tree, the month of the survey, the position of the tree. The results of this finding are as follows: The factor of the month indicated that regardless of the sort, the changing quantity of the SO₂ for all surveryed trees continued to increase as the time from Spring to Autumn passed. Particularly, the increase happened to the case of Ginkgo biloba and Platanus occidentalis, but was slow in Pruns yedoensis, Camellia japonica and Pinus thunbergii. SO₂-related standing was placed as follows: Ginkgo biloba for 0.65%, Platanus occidentalis for 0.56%, Pruns yedoensis for 0.31%, Camellia japonica for 0.27% and Pinus thunbergii for 0.25%. For the average content of heavy metal in the leaves the research founded the Fe for 298.5ppm, Mn for 28.2ppm, Zn for 24.9ppm, Cu for 6.8ppm, Cd for 1.44ppm and Pb for 0.91ppm. The Ginkgo biloba out of the surveyed trees indicated the high content of Fe and Cu, and the Platanus occidentalis recorded the high percentage of Mn, Zn and Cd. The findings thus concluded that based on the absorption and accumulation of SO₂ and each heavy metal, Ginkgo biloba and Platanus occidentalis are considered as the best street trees planted in the city. The NaCl concentration of the surveyed areas were proportional to the distance of the seaside. Specifically, the NaCl concentration of June was higher than that of April. The lowest was in August and the highest in October. The standing for the trees was placed as followe: Ginkgo biloba, Pinus thunbergii, Platanus occidentalis, Pruns yedoensis and Camellia japonica.

목도의 식생현황 및 수목원조성 타당성 연구

남정칠,박승범,김석규 東亞大學校 建設技術硏究所 2007 硏究論文集 Vol.30 No.2

This study is to survey and analyze the vegetation status in Mok Island for studying a Adequacy for making Arboretum. Field surveys were conducted from April to Jun, 2006, then representative sites were classified for further analysis. The results of the study are as follows. Total of 77 plant species consisting 24 woody plants and 53 herbaceous plants were identified from the field survey. Dominant woody plant were Camellia japonica, Machi/us thunbergii, Litsea japonicus, Elaeagnus macrophylla. Dominant herbaceous plant were Lysimachia mauritiana, Crepidiastrum lanceolatum, Aster spathulifolius, Spergularia marina, Carex boottiana. Difference of vegetation were inhabitation of Litsea japonicus.