• Proceedings of the Korean Institute of Industrial Safety Conference
• /
• 2004.04a
• /
• pp.387-392
• /
• 2004

• Proceedings of the Safety Management and Science Conference
• /
• 2007.04a
• /
• pp.173-186
• /
• 2007

• Journal of the Korea Construction Safety Engineering Association
• /
• s.36
• /
• pp.56-64
• /
• 2006

• Safe Food
• /
• v.6 no.1
• /
• pp.29-34
• /
• 2011

• Natural Product Sciences
• /
• v.28 no.4
• /
• pp.168-180
• /
• 2022

Ephedra is a genus of the Ephedraceae family and is found in temperate regions, such as Central Asia and Europe. Among the various ephedra species, Ma Huang (Ephedra herb) is derived from the aerial parts of Ephedra sinica S tapf, Ephedra equisetina Bunge, and Ephedra intermedia Schrenk & C.A. Mey. Ma Huang contains various ephedra alkaloids, including (-)-ephedrine, (+)-pseudoephedrine, (-)-norephedrine, (+)-norpseudoephedrine, (-)-methylephedrine, and (+)-methylpseudoephedrine, which are found naturally as single enantiomers, although they can be prepared as racemates. Although the use of Ma Huang in foods is prohibited in Korea, products containing Ma Huang can be imported, and so it is necessary to develop a suitable analytical technique for the detection of Ma Huang in foods. Herein, we report the development of analytical methods for the detection of ephedra alkaloids in products containing Ma Huang. Following sample purification by solid phase extraction, quantitative analysis was performed using ultra-performance liquid chromatography-triple quadrupole mass spectrometry (UPLC-MS/MS). Additionally, the enantiomers were successfully separated using HPLC-DAD. We successfully analyzed various food samples, where the ephedra alkaloids were qualitatively and quantitatively determined, and the enantiomers were separated. It is expected that these methods may contribute toward preventing the distribution of illegal products containing Ma Huang.

• Proceedings of the KIEE Conference
• /
• 2008.09a
• /
• pp.269-270
• /
• 2008

본 논문에서는 캐나다 중서부에 위치한 BC(British Columbia)주 및 AB(Alberta)주의 수용가 전력설비에 대한 전기안전 시스템에 대해 고찰하였다. 캐나다의 전기안전은 주정부 권한을 위임받은 안전청에서 담당하며, 세부적인 안전관리는 각 주마다 절차 상 약간의 차이는 있었지만, 전체적으로 전기안전이라는 큰 틀 안에서 동일한 맥락으로 통제되고 있었다. 또한, 국내에 비해 전기안전 교육 프로그램 및 홍보가 상당히 강화되어 있음을 알 수 있었다.

• Proceedings of KOSOMES biannual meeting
• /
• 2017.04a
• /
• pp.97-97
• /
• 2017

• Food Science and Industry
• /
• v.44 no.4
• /
• pp.33-43
• /
• 2011

• Safety and Health at Work
• /
• v.12 no.2
• /
• pp.244-248
• /
• 2021

Background: Sunburn is the main avoidable cause of skin cancer. Beach lifeguards spend many hours exposed to the effects of solar radiation during their work day, precisely at times of the year when levels of solar irradiation are highest. The aim of this study is to quantify the risk to beach lifeguards of sun exposure. Methods: A descriptive cross-sectional study was carried out in the Western Costa del Sol, southern Spain, during the summer of 2018. The research subjects were recruited during a skin cancer prevention course for beach lifeguards. All participants were invited to complete a questionnaire on their habits, attitudes, and knowledge related to sun exposure. In addition, ten were specially monitored using personal dosimeters for three consecutive days, and the results were recorded in a photoprotection diary. A descriptive analysis (mean and standard deviation for the quantitative variables) was performed, and inter-group differences were evaluated using the Mann-Whitney U test. Results: Two hundred fifteen lifeguards completed the questionnaire, and 109 met the criteria for inclusion in this analysis. The mean age was 23.8 years (SD: 5.1), 78.0% were male, 71.5% were phototype III or IV (Fitzpatrick's phototype), and 77.1% had experienced at least one painful sunburn during the previous summer. The mean daily personal ultraviolet exposure per day, the minimal erythema dose, and the standard erythema dose, in J/m², were 634.7 [standard deviation (SD): 356.2], 2.5 (SD: 1.4) and 6.35 (SD: 3.6), respectively. Conclusion: Beach lifeguards receive very high doses of solar radiation during the work day and experience correspondingly high rates of sunburn. Intervention strategies to modify their sun exposure behavior and working environment are necessary to reduce the risk of skin cancer for these workers and to promote early diagnosis of the disease.

• Journal of the Korea Institute of Building Construction
• /
• v.19 no.4
• /
• pp.373-382
• /
• 2019

In order to reduce the accident rate of construction in South Korea, governments and its affiliates have been tried to establish a safety culture, however they reached the limit. In addition, researchers recently have conducted regarding the safety climate and concluded that safety climate effect on the safety performance. Although organizational culture and enterprise types are different based on business size, they generalized the level of safety climate with a group only. Therefore, in order to solve this issue, the objective of this study is to analyze the safety climate level of construction company depending on business size in South Korea. In addition, the improvements are suggested on the level of safety climate after problems are drawn from considering organizational culture, enterprise type and construction industry in South Korea. In the future, this study will be used as a baseline for the effects of the safety climate on the safety performance in construction site based on business size.