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임상연구 : 성상신경절 차단이 돌발성 난청의 치료에 미치는 영향
송종욱 ( Jong Wook Song ),심재광 ( Jae Kwang Shim ),문진천 ( Jin Cheon Moon ),안은경 ( Eun Kyoung Ahn ),금창만 ( Chang Man Kum ),윤덕미 ( Duck Mi Yoon ),이원상 ( Won Sang Lee ),신증수 ( Cheung Soo Shin ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.1
Background: Idiopathic sudden sensorineural hearing loss (ISSNHL) is defined as a sensorineural hearing loss which develops abruptly without definitive causes. Stellate ganglion block (SGB) has been used as one of the treatment modalities in ISSNHL. However, published data establishing the effect of SGB has been slim. We conducted this study to evaluate the effect of SGB according to the factors that may influence the prognosis of the disease. Methods: We reviewed the records of 343 patients. The control group was managed with medications, and the SGB group was managed with SGB and the same medications. SGB was performed with 5 ml of 1.0% mepivacaine. The pure-tone audiogram was performed after the therapy and Siegel`s criteria was used to define the recovery of hearing. Results: The recovery rate of the SGB group was higher than that of the control group (58.1% vs. 42.1%, P < 0.05). The SGB group had a higher recovery rate than the control group in patients treated within 7 days from the onset of symptoms (66.9% vs. 44.1%, P < 0.05), without diabetes mellitus (58.5% vs. 44.9%, P < 0.05), without dizziness (61.6% vs. 44.6%, P < 0.05), or whose initial hearing loss was between 71 and 90 dB (69.4% vs. 38.9%, P < 0.05). Conclusions: SGB is thought to be a useful therapy for ISSNHL, especially in the patients treated within 7 days, without diabetes mellitus, dizziness, or whose initial hearing loss was severe. (Korean J Anesthesiol 2006; 51: 52~7)
개인보호장구(PPE)의 사용현황 조사 및 Atomizer 측정에 의한 국내 농약 방제복의 침투성 평가
송종욱(Jong-Wook Song),김종환(Jong-Hwan Kim),조유진(Yu-Jin Cho),김정한(Jeong-Han Kim),박경훈(Kyung-Hun Park),서종수(Jong-Su Seo) 한국농약과학회 2017 농약과학회지 Vol.21 No.4
This study was carried out to investigate the use of Personal Protective Equipments (PPEs) and evaluate the penetration of nine commercially available personal protective clothing and one general shirt based on the ISO 22608 guideline and EN14786 guideline. From the results of the survey, the use of the mask was highest as 67.1% and the goggles was the lowest as 20.7% when they use and handle the pesticides, indicating that most of farm workers did not use PPEs for their heath. In the measurement of penetration using the Atomizer test, the results for the penetration of pendimethalin showed that the penetration of the shirt, F6 (cotton 35%+polymer 65%, porous material, twill weave) and F7 (polyester 100% (polymer coating), porous material) were greater than 51.9%, and for tebuconazole, that of the shirt was 48.1%. Other results were lower than 5.5% and 0.1% of the penetration. This study showed that some clothing were not suitable for use since the ISO guideline requests penetration of 5% as suitable for personal protective clothing. Therefore, it is likely to be necessary to perform penetration measurement methods for the use of suitable protective clothing.
갯기름나물 중 살균제 Azoxystrobin, Fluxapyroxad, Penthiopyrad의 잔류 특성
김영진(Yeong-Jin Kim),송종욱(Jong-Wook Song),최성길(Sung-Gil Choi),김종환(Jong-Hwan Kim) 한국농약과학회 2021 농약과학회지 Vol.25 No.4
This study was conducted to evaluate the residual characteristics and biological half-life values of three fungicides: azoxystrobin, fluxapyroxad, and penthiopyrad and their metabolites: R230310, M700F048, M700F002, 753-A-OH, and PAM on Peucedanum japonicum Thunb. The LC-MS/MS analysis for the pesticides and metabolites was validated in terms of the limits of quantification, linearity, accuracy, and precision using the QuEChERS method. The method limit of quantification (MLOQ) was 0.01 mg/kg and the accuracy and precision ranged 73.8 to 113.7% and less than 8.4%, respectively. The study was carried out in a greenhouse and azoxystrobin 21.7% SC, fluxapyroxad 15.3% SC, and penthiopyrad 20% EC were sprayed three times on different application days before harvest. As a result, the initial residual concentration of azoxystrobin in the sample collected on the day of the final application was 18.06–19.79 mg/kg, then decreased to 87.2% in the harvested sample at 21 days after the final application compared to the initial concentration. The initial concentrations of fluxapyroxad and penthiopyrad were detected as 8.13–9.19 and 3.09–3.49 mg/kg, which decreased to 89.1 and 84.6% after 21 days, respectively. The biological half-lives of each pesticide based on the results of this experiment were 10.7 days for azoxystrobin, 8.2 days for fluxapyroxad, and 10.2 days for penthiopyrad. Three pesticides used for the control of powdery mildew in Peucedanum japonicum Thunb showed a similar decrease over time.
신윤혁(Yoonhyuk Shin),심승규(Seungkyu Sim),송종욱(Jongwook Song),김철민(Chulmin Kim),임동현(Donghyun Lim),김성철(Sung Chul Kim) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
In this study controller integrated heater modules using high voltage power were made for electric vehicles. The heat core and controller for the heater module were designed to improve the heater power density. We also investigated the performance characteristic(heating capacity, energy efficiency, pressure drop) of heater modules through the experiments. Therefore, the experimental results indicated that prototype of heater module had satisfactory performance. This study will contribute to developing the heating system for electric vehicle.