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근린생활권의 물리적 환경이 신체활동 목적의 공원이용에 미치는 영향
이슬기(Lee, Seul-Gi),이우성(Lee, Woo-Sung),백수경(Baek, Su-Kyeong),정성관(Jung, Sung-Gwan),박경훈(Park, Kyung-Hun) 대한국토·도시계획학회 2013 國土計劃 Vol.48 No.7
Urban green space is a valuable community asset that can play an important role in promoting physical activity for health. Therefore, this study examined an association between the characteristics of neighborhood-based physical environment on park usage and physical activity. Geographic information system(GIS) was used to construct spatial data regarding the physical environments across Changwon-si. A questionnaire survey was conducted to obtain information about physical activity in the parks. Binary logistic regression models was used to examine the relationship between the characteristics of physical environments and physical activity in the urban parks. The individual variables, such as mixed land use, ratio of road, sidewalk, pedestrian crossing, intersections density, number of park and park entrance(odds ratio between 1.058 and 2.432, p≤O.1), and network and the shortest distances to park(odds ratio between 0.998 and 0.999, p≤O.Ol) were associated with odds of park-based physical activity. The binary logistic regression model was developed to explain the influence of four factors, accessibility and availability of park, convenience of walking route to park, and abundance of park area derived with factor analysis on park usage for physical activity.
박경훈(Kyeong-Hun Park),김병석(Byeong-Seok Kim),이정주(Jeong-Ju Lee),윤혜정(Hye-Jeong Yun),김세리(Se-Ri Kim),김원일(Won-Il Kim),윤종철(Jong-Chul Yun),류경열(Kyoung-Yul Ryu) 한국토양비료학회 2012 한국토양비료학회지 Vol.45 No.6
재배과정, 수확, 가공 및 유통 단계에서 당귀의 미생물적 위해요소를 조사하였다. 뿌리, 토양 및 관개수를 포함한 111개의 시료가 생산과정과 유통과정에서 호기성균, B. cereus, coliform, E. coli, L. monocytogenes, Salmonella spp., 와 S. aureus를 조사하기 위해 수집하였다. 재배과정에서 당귀의 뿌리에서 일반세균수는 6.71 log CFU g<sup>-1</sup> 수준으로 검출되었으며, 대장균군은 4.13 log CFU g<sup>-1</sup>, B. cereus는 3.54 log CFU g<sup>-1</sup> 수준으로 확인되었다. 수확에서 가공 단계까지 모든 가공 과정에서 대장균군과 B. cereus의 오염을 확인할 수 있었으며, 절단 과정에서 미생물오염도가 높게 확인되었다. 유통과정 중인 당귀에서 일반세균수는 5.6~6.0 log CFU g<sup>-1</sup>, 대장균군은 2.4~2.6 log CFU g<sup>-1</sup>, B. cereus는 5.4~6.0 log CFU g<sup>-1</sup> 수준으로 검출되었다. 모든 시료에서 L. monocytogenes, Salmonella spp., S. aureus는 검출되지 않았다. 이러한 결과는 유해미생물의 오염을 감소시키고, 안전한 농산물을 생산하기 위하여 위생적인 토양관리 및 수확 후 관리가 수행되어야 하는 것을 의미한다. This study is aimed to investigate microbiological contamination of Angelica gigas Nakai. A total of 111 samples including root, soil, and irrigation water were collected from farms and market to detect aerobic bacteria, Bacillus cereus, coliform, Escherichia coli, Listeria monocytogenes,. Salmonella spp., and Staphylococcus aureus. The contaminations of aerobic bacteria, coliform, and Bacillus cereus in the root during cultivation were found 6.71 log CFU g<sup>-1</sup>, 4.13 log CFU g<sup>-1</sup>, and 3.54 log CFU g<sup>-1</sup>, respectively. The contamination of coliform and B. cereus were detected in all steps from harvesting to processing, with the highest count recorded from the cutting step. In marketing, the contaminations of aerobic bacterial, coliform, and B. cereus were 5.5~6.0 log CFU g<sup>-1</sup>, 2.4~2.6 log CFU g<sup>-1</sup>, and 3.5~4.0 log CFU g<sup>-1</sup>, respectively. Listeria monocytogenes, Salmonella spp, and Staphylococcus aureus were not detected in any of samples. This result indicated that hygienic soil management and post harvest management should be performed to reduce the contamination of hazard microorganisms and to produce safe agro-products.
박경훈(Kyeong-Hun Park),김병석(Byeong-Seok Kim),윤혜정(Hye-Jeong Yun),류경열(Kyoung-Yul Ryu),윤종철(Jeong-Chul Yun),최준열(June-Yeol Choi),김기덕(Ki-Deog Kim),진용익(Yong-Ik Jin) 한국토양비료학회 2012 한국토양비료학회지 Vol.45 No.6
대관령 고랭지 농업지대 인근 주요 하천과 도암호의 수질의 이화학성 및 식물성플라크톤의 발생 양상을 조사하여 남한강 상류 수계의 전반적인 수질특성을 파악하고자 하였다. 도암호의 화학적 산소 요구량 (COD)은 6.1 mg L<sup>-1</sup> 이고, 총 인 (Total phosphorous)의 함량은 0.26 으로 호소수 생활환경 기준 Ⅵ등급 보다 높았다. 부유물질은 평균 9.77 NTU로 호수수 생활기준 보다 높았다. 식물플랑크톤의 농도는 7월부터 9월까지 2.0×10<sup>3</sup> cells mL<sup>-1</sup> 이상으로 확인되었는데 이는 여름철 고온과 강우에 의해 영양물질의 대량 유입으로 인해 남조류가 발생하였기 때문인 것으로 생각된다. 온타리오 퇴적물 기준과 비교해 보면, 도암호의 총 질소 및 총 인의 농도는 LEL과 SEL의 중간 정도 값을 보여 오염이 상당부분 진행되어 체계적인 관리로 오염원을 저감 및 차단할 수 있는 방안이 마련되어져야 할 것으로 생각된다. This study was surveyed that water physiochemical characteristics and phytoplankton incidence of main stream and Lake Doam near to Daegwallyeong agricultural area. Based on above results, it was conducted to get information overall water characteristics in south Han upstream river. COD value of Lake Doam was 6.1 mg L<sup>-1</sup> and T-P (Total phosphorous) from there was 0.26 mg L<sup>-1</sup> which was higher than the value of grade Ⅵ based on lake water living environment standard. Suspended solid was an average of 9.77 NTU which was higher than value of lake living standard. Concentration of phytoplankton was over 2.0×10<sup>3</sup> Cell mL<sup>-1</sup> from July to September. It was considered that cyanobacteria were occurred due to massive influx of nutrient material by high temperature and rainfall during this season. Compare to Ontario"s sediment quality guidelines, T-N and T-P was middle value between LEL and SEL in Lake Doam. This value means that contamination in water is serious. Therefore, it is considered that systematic management was needed to reduce and block contamination source.
박경훈(Kyeong-Hun Park),윤혜정(Hye-Jeong Yun),류경열(Kyoung-Yul Ryu),윤종철(Jeong-Chul Yun),이정주(Jeong-Ju Lee),황현아(Hyun-ah Hwang),김기덕(Ki-Deog Kim),진용익(Yong-Ik Jin) 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.6
대관령 농업지역의 연 평균기온은 6.4℃, 1월 평균 기온은 -7.6℃, 7월 평균 온도는 19.1℃이었으며 강수량은 1717.2mm, 안개 현상일수는 133일, 서리 현상일수는 59일 이었고, 특히 6월 8월 사이에 100 mm 이상의 집중 강우가 많았으며, 잦은 안개와 일조시간의 부족으로 병해충의 발생 및 작물생육이 불량한 것으로 관찰되었다. 수질모니터링 결과 작물재배시기에 T-N, T-P 등 영양물질의 수질오염도가 높았으며, 7월~8월의 강우에 의한 토양유실로 영양물질의 오염도가 높게 관찰되었다. 배추재배지에서 T-N 농도는 평균 9.4 mg L<SUP>-1</SUP> (7.4~11.3)로 감자재배지의 평균 4.4 mg L<SUP>-1</SUP> (3.1~7.2)의 2배 정도 높았고, T-P의 경우도 배추재배지에서 평균 0.084 mg L<SUP>-1</SUP> (0.061~0.101)로 감자재배지 평균 0.036 (0.019~0.056) mg L<SUP>-1</SUP>의 농도보다 약 2배 정도 더 높았다. 부유물질 경우는 배추재배지가 평균 18.3 mg L<SUP>-1</SUP> (3.0~53.0)로 감자재배지 평균 1.9 mg L<SUP>-1</SUP> (0.5~3.0)로 무려 9배나 높았다. 이처럼, 배추재배지가 감자 재배지보다 수질 오염도가 높은 것은 대관령 지역에서 배추는 감자보다 생육기간이 짧고 또한 피복율도 작기 때문에 토양유실이나 양분유실이 많았던 것으로 판단된다. 경작중에 고랭지 작물재배지 토양을 분석한 결과, 작물별로 토양화학성의 차이는 작았으며, pH는 5.6~6.8사이, EC는 0.67~1.13 dS m<SUP>-1</SUP>, 유기물은 18.0~42.4 g kg<SUP>-1</SUP>, 유효인산은 316~658 mg kg<SUP>-1</SUP>, 치환성 칼륨은 0.41~0.88 cmolc kg<SUP>-1</SUP>, 치환성 칼슘은 3.7~7.1 cmolc kg<SUP>-1</SUP>, 치환성 마그네슘은 1.2~1.9 cmolc kg<SUP>-1</SUP> 범위였다. In order to provide the basic information on the agricultural environment in Daegwallyeong Highland, the characters of weather, water, and soil quality were investigated. The meteorological characteristics was monitored by automatic weather system (AWS) at 17 sites. The quality of water for samples were collected monthly at 24 sites depending on landuse style. Soil samples were collected from a forest, grassland, and the major vegetable cultivation areas such as potato, carrot, Chinese cabbage, onion, head lettuce, and welsh onion field. The weather showed the mountain climate, and the average yearly temperature is 6.4℃, the average temperature in January is -7.6℃ and the average temperature in July is 19.1℃, and the change of temperature on the districts of Daegwallyeong is severe. The yearly record of precipitation shows 1717.2 mm. The water quality of crop field was worse than forest or grassland in Daewallyeong highland. In 2005, annual T-N, T-P, SS distribution of Chinese cabbage field showed 7.4~11.3, 0.061~0.1, and 3.0~53.0 mg L<SUP>-1</SUP>. The potato field showed 3.1~7.2 , 0.019~0.056 and 0.5~3.0 mg L<SUP>-1</SUP>, respectively. Being compared of water quality between potato field and chinese cabbage field, it showed that the water quality of Chinese cabbage field was worse than potato field. On farming, the soil of crop cultivation showed pH 5.6 to 6.8, 18.0~42.4 g kg<SUP>-1</SUP> of OM, 316~658 mg kg<SUP>-1</SUP> of Avail. P2O5. The content of cations showed 0.41~0.88 cmolc kg<SUP>-1</SUP> of Exch. K, 3.73~7.07 cmolc kg<SUP>-1</SUP> of Exch. Ca and 1.17~1.90 cmolc kg<SUP>-1</SUP> of Exch. Mg.
인삼모잘록병원균에 항균활성을 갖는 Bacillus 균의 분리 및 특성조사
박경훈(Kyeong Hun Park),박홍우(Hong Woo Park),이성우(Seong Woo Lee),이승호(Seung Ho Lee),명경선(Kyung Sun Myung),이상엽(Sang Yeob Lee),송재경(Jaekyeong Song),김영탁(Young Tak Kim),박경수(Kyoung Soo Park),김영옥(Young Ock Kim) 한국농약과학회 2016 농약과학회지 Vol.20 No.4
This study was performed to select potentially available biological control agent from soil bacteria for prevention of ginseng damping off. More than five hundred strains were isolated from ginseng rhizosphere soil. By testing antifungal activity, we have selected three soil bacteria strains and their ability to produce antibiotics and lytic enzymes such as cellulase, protease and pectate lyase was examined. Also, the presence of genes for biosynthesis of lipopeptide such as fengycin, bacillomycin D, surfactin, iturin A, and zwittermicin A was investigated in selected strains. All three strains produced cellulase, protease, and xylanase. Moreover, these strains had gene for biosynthesis of bacillomycin D, surfactin, and iturin A. ES1 and ES3 strains were identified Bacillus methylotrophucus and ES2 was confirmed Bacillus amyloliquefaciens using phylogenetic analysis on the basis of 16S rRNA gene sequences. In field test, control value of ES1, ES2 and ES3 treatment was 32.4%, 46.8% and 36.7%, respectively. This results indicate that antagonistic microbes with high ability of antifungal and lytic enzyme activity can be used as a useful biological control agent to control ginseng damping off.