수도품종의 대기오염적응성

朴晥澈,金光鎬 韓國作物學會 1985 Korean journal of crop science Vol.30 No.1

수도오염지역에 적응하는 수도품종을 선정할 목적으로 10개 장려품종을 공시하여 년중 계속해서 배출되는 복합오염물(SO2 , HF)의 영향을 받고 있는 오염지역과 이로부터 7km 떨어져 있는 비오염지역에서 실험을 수행하였으며 엽내오염물함량, 연반률, 수량 및 엽록소함량을 조사, 비교한 결과는 다음과 같다. 1. 오염지역에서 재배한 벼의 엽내 전류황 및 불소함량이 비오염지역에서보다 많았으며 연반은 오염지역에서만 발생하였는데 다수계품종이 일반계품종보다 연반발생률이 훨씬 높았다. 2. 연반발생률과 오염지역에 대한 비오염지역의 불소함량비율간에는 단상관이 그리고 연반발생률과 불소 및 전류황함량비율간의 중상관은 유의성이 인정되었으나 전류황함량비율과는 관계가 없었다. 3. 공시한 10개 품종중 오염지역에서 수량성이 높았고 비오염지역에 대한 오염지역에서의 수양비율이 높았던 낙동벼. 동진벼, 남풍벼, 서광벼 및 청청벼 둥을 대기오염지역에 적응하는 품종으로 선정할수 있었다. 4. 오염지역에서 생육한 벼는 주당수수, 1,000입중 및 등숙비율이 비오염지역보다 낮았으며 대기오염에 적응하는 품종들은 두 지역간 주당수수 및 등숙비율의 변이가 적었다. 5. 오염지역에서 생육한 벼의 지엽내 엽록소함량은 비오염지역에서의 것보다 낮았는데 엽록소 a가 b보다 대기오염물에 대하여 더 민감한 반응을 보였다. 6. 비오염지역에 대한 오염지역의 품종별 수량비율은 품종의 연반율, 두 지역간 엽내 전류황함량비율, 불소함량비율 및 엽록소함량비율 등과 아무런 관계도 인정되지 않았다. Ten recommended rice varieties were cultivated in paddy area affected by air-pollutants and in normal area to select varieties adaptable to air-pollution environment. Rice plants grown in pollution site showed higher contents of total sulfur and fluorine in leaf through the whole growing period compared with those in non-pollution site, and rice leaves destroyed by air-pollutants were found only in pollution site. Rice grain yield and four yield components of ten rice varieties grown in pollution site were lower than those in normal area. Five rice varieties among ten were selected as adaptable to air-pollution environment, based on their yielding potential in pollution site and grain yield ratio between two sites. Rice varieties adaptable to pollution showed little variation of percent ripened grains and number of panicles per hill between two sites. Chlorophyll content in flag leaf of rice plants grown in pollution area was lower than in non-pollution area. No relationship was found between grain yield ratio (pollution/non-pollution site) of ten varieties and total sulfur content ratio, fluorine content ratio, chlorophyll content ratio between two sites, and percent destroyed leaf in pollution site, respectively. This result suggest that varietal adaptability to air-pollution environment is not related with the amount of pollutants absorbed, but with the degree of response to pollutants.

도심지 친수환경조성

박환철,송용진,Park, Hwan-Cheol,Song, Yong-Jin 한국수자원학회 2011 물과 미래(한국수자원학회지) Vol.44 No.4

Prevalence of Atrial Fibrillation and Relation to Echocardiographic Parameters in a Healthy Asymptomatic Rural Korean Population

박환철,박진규,최성일,김순길,김미경,최보율,신진호 대한의학회 2015 Journal of Korean medical science Vol.30 No.8

Atrial fibrillation (AF) is the most common arrhythmia worldwide and a potent independent risk factor for stroke. This study aimed to determine the prevalence of AF in a populationbased sample of adults in a rural region of Korea. Between January 2005 and December 2009, 4,067 individuals (60.2 ± 11.2 yr old, M: F = 1,582:2,485) over 21 who were residents of the county of Yangpyeong, Korea, participated in the study. AF was assessed on a resting 12-lead electrocardiogram (ECG) in 4,053 of the participants. Blood tests and transthoracic echocardiography (TTE) were also performed to investigate the relationship between left ventricular mass and AF in the study group. Fifty-four cases (32 men) were diagnosed as AF among the 4,053 subjects. The crude prevalence of AF was 1.3%. It was highest (2.3%) among sixty- and seventy- year olds, and higher in men than women in all age groups over 50. The prevalence in men was 2.0%, and in women 0.9%. In univariate analysis, age, male gender, body mass index, total serum cholesterol, alanine transaminase, serum creatinine, adiponectin level, and ischemic heart disease were associated with AF. Among the TTE parameters, systolic and diastolic left ventricular systolic internal dimension (LVID), and LV ejection fraction were associated with AF. In this relatively healthy population in a rural area of Korea, the prevalence of AF is 1.3%, and increases with age. Of the TTE parameters, systolic and diastolic LVID and left atrial diameter are related to prevalence of AF.

순환기 : 실신과 상완 무력감을 주소로 진단된 쇄골하동맥 도루 증후군 (초)

박환철,김선민,최성일,신진호,이재웅,김경수,김순길,김정현,임헌길,이방헌 대한내과학회 2008 대한내과학회 추계학술대회 Vol.2008 No.-

이단 압착식 동관 피팅기의 구조설계에 관한 기초연구

박환철,정지현 한국동력기계공학회 2022 동력시스템공학회지 Vol.26 No.2

본 연구에서는 공조냉동기의 냉매 이송용으로 사용되는 동관의 이음방법을 기존의 산소용접에 의한 방법을 탈피하여 인화성 문제를 해결할 수 있는 압착식 이음방법을 제안한다. 압착식 이음장치를 3D 모델링으로 구현하고 시뮬레이션을 통해 동관의 이음특성을 검증한다. 시뮬레이션은 벤딩 전용 해석프로그램인 Deform 3D를 사용하고 동관 압착시 압착력을 발생시키는 롤러(roller)의 형상에 따른 동관과슬리브(sleeve)의 접촉길이와 접촉부 형상을 분석한다

동적파라미터 변동을 고려한 윈치 및 부하 운동제어시스템설계에 관한 연구

박환철,김영복,PARK, Hwan-Cheol,KIM, Young-Bok 한국수산해양기술학회 2017 수산해양기술연구 Vol.53 No.3

In this study, a winch and load motion control system design method is introduced. Especially, the winch and load (moving cart) are connected with long wire rope which is extended to few kilometers long. Therefore, the rope length changes such that many dynamic parameter values are changed as well by winding and releasing the rope from the winch system. In this paper, the authors designed the control system by considering the real time parameter variation to occupy and keep good control performance continuously. The effectiveness of introduced method was evaluated by simulation results.

편평어 자동선별시스템 개발에 관한 연구

박환철,김태완,이동훈,김영복 한국수산해양기술학회(구 한국어업기술학회) 2020 수산해양기술연구 Vol.56 No.1

In this study, the authors introduce a newly developed flatfish grading system. Owing to the features of flatfish with and wide body, the general types of grading system are not easy to apply for it. Furthermore, the flatfish to be graded is alive such that the existing measurement and grading systems cannot be used for it as well. This study gives a solution for measuring and grading the flatfish with high speed and good accuracy. For this object, the authors developed flatfish measurement and grading system. This system consist of the feeding, conveying, measurement part and sorting part. Especially, the measurement part is made by vision based measuring technique which satisfies the given specification. The result from the experiment shows that the developed system is applicable for measuring and grading the flatfish sizes in variety.

포스터 전시 발표 : 순환기 ; 긴 좌전하행지 심근교락과 연관된 급성 심근 경색증 1례

박환철,유선진,조현석,이재웅,임영효,이제,신진호,김순길,김정현,임헌길,이방헌,김경수 대한내과학회 2003 대한내과학회 추계학술대회 Vol.65 No.10

大麥에서의 Source and Sink Relationship에 關한 硏究

朴晥澈 건국대학교 1981 論文集 Vol.13 No.1

The studies were carried out to investigate source and sink relationship of barley by means of change the equilibration between source and sink by cutting the leaf, removing the panicle. The results obtained are summarized as follows; 1.The more the leaf cut, the more the panicle length, grain numbers and grain weight diminished. 2.In the case of cutting the leaf and removing the panicle the photosynthetic products transmit from the stem which removed the panicle to other stem which did not removed the panicle.

水稻品種의 大氣汚染適應性에 關한 硏究

朴晥澈 건국대학교 1985 論文集 Vol.20 No.1

Experiment were conducted to select the rice varieties to be adapted to air pollution through the total sulfur, water soluble sulfur, fluorine, chlorophyll in leaves and ratio of destroyed leaf of 10 varieties, Nagdong, Seomjin, Dongjin, Samnam, Nampoong, Hangangchal, Seogwang, Poongsan, Taebaeg, Cheong-cheong, were investigated on the outskirts of Yeo-Chun Industrial Estate where sulfur dioxide and fluoride were emitted and on non-pollution site. The results obtained can be summarized as follows ; 1. Total sulfur, water soluble sulfur, fluorine content in leaves were higher on pollution site than on non-pollution site. 2. Five varieties, Nagdong, Dongjin, Nampoong, Seogwang, Cheong-cheong, can be selected to varieties to be adapted to air pollution, 3. Most of yield components were higher on non-pollution site than pollution site. 4. The ratio of destroyed leaf and pollutants ratio, in leaves pollution/non pollution site were not correlated with the ratio of yield, pollution site/non-pollution site. 5. Chlorophyll contents in loaves were higher on non-pollution site than on pollution site and it's ratio, pollution site/non-pollution site, was not correlated with the ratio of yield.