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( Hyo Bi Kim ),( Mat Thew Yoon ),( Soo Jin Lee ),( Yang Ho Jang ),( Nong Hoon Choe ) 한국예방수의학회 2014 예방수의학회지 Vol.38 No.4
Salmonellosis is a significant public health concern and a major cause of bacterial foodborne poisoning in Korea. Approximately 95% of salmonellosis cases in humans are related to the intake of contaminated food products, which mostlyoriginate from livestock such as poultry, pigs, and cattle. To successfully develop strategies to reduce the spread ofSalmonella, it is important to investigate the prevalence of Salmonella spp. isolated from food animals and meat. In Korea,the prevalence of Salmonella spp. in cattle was 1.2 2.0%, whereas in pigs it was 1.5 21%. Of all livestock and meatproducts analyzed, the Salmonella isolation rate was the highest in chickens (18.8 30.3%) and their meat. Antibiotic resistance is an important social issue. The frequent use of antibiotics in the livestock industry has led to increasedantibiotic resistance in Salmonella isolates that are extracted from livestock, which raises serious public health concerns. Toprevent the spread of antibiotic resistance, it is essential to collect data related to antibiotic-resistant Salmonella strainsisolated from food animals and meat. Antibiotic resistance tests revealed that Salmonella isolated from cattle, pigs, and poultrywere highly resistant to tetracycline and streptomycin. Recent studies show that the overuse of antibiotics in food animalscan also affect antibiotic resistance in humans. Therefore, it is important to establish an appropriate management strategyto successfully prevent misuse of antibiotics within the Korean livestock industry.
변비조 ( Bi Jo Byun ),김선희 ( Seon Hee Kim ),장창호 ( Chang Ho Jang ) 한국노인의료복지학회 2013 노인의료복지연구 Vol.5 No.1
This study intended to prevent and relieve the exhaustion of the nurse working in the hospital by understanding the effects of the general characteristic of the demographic-sociology, the work-released stress and duty resource on the exhaustion subjecting the nurse working in the senior hospital in Dae-gu shi and Gyeonsangbuk do. The result of this study is as follows; The first, in case of the exhaustion depending on the general characteristic of the subject showed the difference by the number of the hospitals which they worked and the salary. The second, among the correlation bewteen the related variations, the factor which h as the most relation between each factor was between the exhaustion and the the duty obligation showing r = .504 of the correlation to show the high relation beween the exhaustion and the duty obligation. The third, among the factors affecting the exhaustion of the nurse working in the senior hospital, the total working years for the hospital of general characteristic factor, the duty obligation and the occupation culture of the duty-released stress factors and the social support of duty resource factor showed the statistically significant features. The more were the duty obligations the higher was the exhaustion of the nurse and the more were the total working years for the hospital, the occupation cultures and the social support, the less was the exhaustion of the nurse in the senior hospital.
Jin-Ho Kim,Thanh-Tam Ho,Eun Bi Jang,Seolah Kim,Kang Hyuk Lee,Song-Seok Shin,So-Young Park 한국화훼학회 2019 화훼연구 Vol.27 No.4
Lilium dauricum is a rare and endangered species belonging to the family Liliaceae. The species contains several bioactive compounds used as functional foods and medicinal agents in Northeast Asia. This study aimed (1) to establish an in vitro bulblet culture using an air-lift bioreactor and callus culture for the conservation of L. dauricum and obtaining its bioactive compounds; (2) investigate the plant phenolic compounds from both cultures system. The highest bulblet production with 12.5-fold increase in growth rate was obtained using MS medium supplemented with 0.5 g L-1 BA and 3% sucrose. Addition of 7% sucrose facilitated bulblet enlargement, with approximate 2.5- and 7-fold increases in diameter and fresh weight, respectively. The highest rate of callus (100%) was obtained using a combination of 1.0 mg L-1 picloram and 0.5 mg L-1 Kinetin. The callus proliferation occurred on MS medium supplemented with 1.0 mg L-1 picloram, 0.25 mg L-1 kinetin, and 0.25 g L-1 casein hydrolysate. There was a significant difference in the total phenolic compound content of callus, which was 1.5-fold higher than that in the bulblets. These findings indicate a suitable system for optimizing both bulblet and callus culture of L. dauricum, therefore, providing useful bio-materials for industrial purposes and contributing to the conservation of this species.
( Yang Ho Jang ),( Soo Jin Lee ),( Hyo Bi Kim ),( Seon Jong Yun ),( Byung Jae So ),( Nong Hoon Choe ) 대한보건협회 2013 대한보건협회 보건종합학술대회 Vol.2013 No.-
Avian influenza viruses are highly susceptible to all disinfectants because they are enveloped viruses. Disinfectants effective against AIVs have optimum efficacies at temperatures above 20°C. Very few studies on effective disinfectants at low temperatures have been done. The aim of this study was to evaluate the change in the efficacy of 6 disinfectants approved for use against the avian influenza virus (AIV). Disinfectants were investigated at four different temperatures (25°C, 4°C, 0°C, and .10°C) and two contact times (1 min and 5 min) with suspension tests. Further storage time (3, 10, 20, and 30 days) on the efficacy of disinfectants diluted to two working concentration (hard water and organic material condition) also investigated. The results from the suspension test indicated that low temperatures inhibited the virucidal efficacy of citric acid (CA) and citric acid+quaternary ammonium compounds (CA+ QACs) for both 1 min and 5 min, while the remaining disinfectants were effective, regardless of the short contact times and low temperatures. The working concentration with organic material condition may be stored for up to 30 days at room temperatures without loss of effectiveness against AIVs however, in the hard water condition, the efficacy of diluted disinfectants were reduced after 3 days old. For a successful disinfection during winter, the disinfectants which could have short contact times with optimum efficacy and freshly prepared disinfectant performed better in the hard water condition. Acknowledgements: This study was supported by a grant (Z-1541745-2012-13-01) from Animal, Plant & Fisheries Quarantine and Inspection Agency(QIA), Ministry of Food, Agriculture, Forestry and Fisheries, Republic of Korea in 2012.
The Effects of Negative Carbon Ion Beam Energy on the Properties of DLC Film
Choi Bi Kong,Choi Dae Han,Kim Yu Sung,Jang Ho Sung,Lee Jin Hee,Yoon Ki Sung,Chun Hui Gon,You Young Zoo,Kim Dae Il 한국표면공학회 2006 한국표면공학회지 Vol.39 No.3
The effects of negative carbon ion beam energy on the bonding configuration, hardness and surface roughness of DLC film prepared by a direct metal ion beam deposition system were investigated. As the negative carbon ion beam energy increased from 25 to 150 eV, the sp³ fraction of DLC films was increased from 32 to 67%, while the surface roughness was decreased. The films prepared at 150 eV showed the more flat surface morphology of the film than that of the film prepared under another ion beam energy conditions. Surface roughness of DLC film varied from 0.62 to 0.22 ㎚ with depositing carbon ion beam energy. Surface nanohardness increased from 12 to 57 Gpa when increasing the negative carbon ion beam energy from 25 to 150 eV, and then decreased when increasing the ion beam energy from 150 to 200 eV.
Development of Optical System for ARGO-M
Nah, Jakyoung,Jang, Jung-Guen,Jang, Bi-Ho,Han, In-Woo,Han, Jeong-Yeol,Park, Kwijong,Lim, Hyung-Chul,Yu, Sung-Yeol,Park, Eunseo,Seo, Yoon-Kyung,Moon, Il-Kwon,Choi, Byung-Kyu,Na, Eunjoo,Nam, Uk-Won 한국우주과학회 2013 Journal of Astronomy and Space Sciences Vol.30 No.1
ARGO-M is a satellite laser ranging (SLR) system developed by the Korea Astronomy and Space Science Institute with the consideration of mobility and daytime and nighttime satellite observation. The ARGO-M optical system consists of 40 cm receiving telescope, 10 cm transmitting telescope, and detecting optics. For the development of ARGO-M optical system, the structural analysis was performed with regard to the optics and optomechanics design and the optical components. To ensure the optical performance, the quality was tested at the level of parts using the laser interferometer and ultra-high-precision measuring instruments. The assembly and alignment of ARGO-M optical system were conducted at an auto-collimation facility. As the transmission and reception are separated in the ARGO-M optical system, the pointing alignment between the transmitting telescope and receiving telescope is critical for precise target pointing. Thus, the alignment using the ground target and the radiant point observation of transmitting laser beam was carried out, and the lines of sight for the two telescopes were aligned within the required pointing precision. This paper describes the design, structural analysis, manufacture and assembly of parts, and entire process related with the alignment for the ARGO-M optical system.