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Ochratoxin A에 오염된 배합사료가 육계의 성장에 미치는 영향 및 독소분해제로서 Mycofix<SUP>Ⓡ</SUP>-Plus의 첨가 효과에 관한 연구
이보근,이소연,김지숙,이완섭,김재영,주양돈,안병기,안종성,조병임,강창원 한국가금학회 2008 한국가금학회 정기총회 및 학술발표회 Vol.25 No.-
This study was carried out to investigate the dietary effects of ochratoxin A (OTA) on growth performance and physiological responses and the efficacy of Mycofix®-Plus as detoxifier in broiler chicken. A total of two hundred 1-d-old male broiler chicks were divided into five groups and fed each experimental diets containing OTA (l or 2 ppm) with or without Mycofix®-Plus (0.2%) for 5 wk. OTA decreased the growth performance of chicks significantly and this effect could be partially counteracted by feeding Mycofix®-Plus. The contents of OTA in liver and kidney of chicks fed OTA were found in proportion to the amount of dietary OTA. Mycofix®-Plus supplementation ameliorated the OTA organ accumulation.
이보근,양정문,송서일 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.2
When defect levels in a process become very low say under PPM(parts per million), there will be very long periods of time between the occurrence of a nonconforming unit. The 3σ control limits of conventional control chart has some problems at PPM environments. Thus, concentional p and c chart become ineffective as defect levels are driven into the low PPM range. In this paper p and c chart suggested by Goh is shown the best way.
强制運動에 依한 胃出血에 있어서 그 負荷時間 및 反復負荷가 白鼠 胃粘膜의 微細血管 및 비반세포에 미치는 影響에 關한 實驗的 硏究
李寶根 慶北大學校 醫科大學 1972 慶北醫大誌 Vol.13 No.2
Vascular changes and mast cell count of the mucosa of rat stomach were examined according to the duration of exertion stress and times of repetition of stress with days of rest interυals. Exertion stress was induced by the method described by Robert et al, i. e., forced muscular exercise by runing the interior of rotating drum for three periods of 45 min. each seperated by two rest periods of 15 min. each as a full course, and experimental groups were deυided into the following 5 groups. ⑴ 45 min. group: Group of rats examined after exertion stress of 45 min. duration. ⑵ 90 min. group: Group of rats examined after two periods of 45 min. exertion stress with a period of rest of 15 min. in between. ⑶ 135 min. group: Group of rats examined after three periods of 45 min. exertion stress each seperated by two rest periods of 15 min. each (a full course). ⑷ 135 min. x 2 group: Group of rats examined after repeated exertion stress of two full courses of stres with a 3 days of rest interυal in between. ⑸ 135 min. x 3 group: Group of rats examined after repeated exertion stress of three full courses of stress with a 3 days of rest interυal between each. The results of the study can be summarized as follows: 1. Macroscopic mucosal hemorrhage of the stomach was most marked in 135 min. group and it became less marked in repeated stress groups of 135 min. x 2 and 135 min. x 3 groups. 2. Microscopic υascular engorgements of the gastric mucosa parallels roughly to the degree of macroscopic hemorrhage, that is, it was most marked in 135 min. group and became less marked in repeated stress groups of 135 min. x 2 and 135 min. x 3 groups. 3. Mast cell count of submucosa of the stomach decreased to the lowest leυel in 45 min. group and did not change further by prolongation of the stress (i.e. in 90 and 135 min. groups) or repetition of the stress (i.e. in 135 min. x 2 and x 3 groups). 4. The above results suggest that macroscopic mucosal hemorrhage or microscopic vascular engorgement of the gastric mucosa is not necessarily related to the changes of the mast cells in the gastric submucosa. In other words, mucosal hemorrhage and vascular engorgement can be influenced by other or additional factors than mast cell degranulation.
청소년의 코로나19로 인한 신체활동 변화와 학업성적에 따른 스마트폰 사용시간 및 좌식시간 실태 분석
이보근,김언호 한국체육측정평가학회 2022 한국체육측정평가학회지 Vol.24 No.4
The purpose of this study is to provide countermeasures and basic data by analyzing changes in youth physical activity and sitting time (other than learning purpose and learning purpose). Using the original data of the 17th (2021) Youth Risk Behavior Survey jointly conducted by the Korea Centers for Disease Control and Prevention. This study conducted a composite sample cross-analysis and a one-way variance analysis of a composite sample using raw data from a web-based survey of 54,848 teenagers. According to the research results, first, the relationship between changes in physical activity and academic performance due to COVID-19 (p=.000) was found to have a statistically significant relationship between both middle and high school students. In addition, as a result of examining the relationship between changes in physical activity caused by COVID-19 and smartphone usage time, middle school students (p=.001), a high school student (p=.000) All were found to have a statistically positive relationship, and finally, the relationship between physical activity change and sitting time due to COVID-19 showed a statistically significant relationship between middle and high school students for academic purposes (p=.000), Middle school students (p=.053) did not show a statistically significant difference, but high school students (p=0.23) showed a statistically significant difference. As a result, the level of physical activity of adolescents decreased due to COVID-19, and as physical activity increased, smartphone use time and sitting time other than learning purposes increased, and as physical activity decreased, the sitting time for learning purposes increased. 본 연구는 질병관리청과 교육부가 공동으로 시행하는 제17차(2021년) 청소년건강행태조사 원시자료를 활용하여 코로나19로 인한 청소년의 신체활동 변화와 학업성적에 따른 스마트폰 사용시간 및 좌식시간(학습목적 및 학습목적 이외)의 실태를 분석하여 코로나19로 인한 청소년의 신체활동 수준의 변화와 대표적인 청소년 문제 중 스마트폰 사용시간과 좌식생활이 청소년에게 미치는 영향에 대한 실태를 파악하여 향후 비슷한 상황에 직면할 때 이에 대한 대책 마련을 위한 기초자료를 제공하는 데 목적이 있다. 본 연구는 청소년 54,848명을 대상으로 웹기반조사 원시자료를 활용하여 복합표본 교차분석과, 복합표본 일원변량분산분석을 실시하였다. 연구결과에 따르면 코로나19로 인한 신체활동 의 변화와 학업성적의 관계(p=.000)는 중학생과 고등학생 모두 통계적으로 유의한 관계가 있는 것으로 나타났다. 또한 코로나19로 인한 신체활동의 변화와 스마트폰 사용시간에 대해 관계를 살펴본 결과 중학생(p=.001), 고등학생 (p=.000) 모두 통계적으로 정적 연관성이 있는 것으로 나타났다. 마지막으로 코로나19로 인한 신체활동의 변화와 좌식시간의 관계는 학업목적으로의 좌식시간은 중학생과 고등학생 모두 통계적으로 유의한 관계를 나타냈다(p=.000). 학습목적 이외의 좌식시간은 중학생(p=.053)은 통계적으로 유의한 차이가 나타나지 않았지만 고등학생(p=0.23)은 통계적으로 유의한 차이가 나타났다. 따라서 결과적으로 코로나19로 인해 청소년의 신체활동은 전반적으로 감소하였다. 또한 신체활동이 증가할수록 스마트폰 사용시간과 학습목적 이외 좌식시간은 증가하였으며, 신체활동이 감소할수록 학습목적의 좌식시간은 증가하였다. 따라서 향후 코로나19의 재확산이나 새로운 감염병의 발생 시 청소년의 신체활동 감소와 학업, 청소년의 사회적 문제로 지적되고 있는 스마트폰 사용시간 및 좌식생활에 대한 대응전략의 개발이 필요하다.