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Seongwoo Choi,Juhee Lee,Yeomyeong Lee,Pil Joo Kim,Ju-Sik Cho,Yong Hwa Cheong,Yo-Sup Rim,Sang Yoon Kim 한국토양비료학회 2020 한국토양비료학회지 Vol.53 No.4
Ethephon is one of the chemical stimulator of crop growth that is also considered as a structural analogue of coenzyme M (CoM), having a promising potential for methanogenic inhibitor. However, the effect of ethephon application on greenhouse gas (GHG) emissions under rice cultivation has not been studied yet. In this pot experiment, different levels of ethephon (0, 2.5, 5 and 10 ㎎ L<SUP>-1</SUP>) were applied at the presence or absence of manure compost as an organic amendment to study its effect on GHGs emissions in particular CH₄ and rice productivity during the cultivation. Application of ethephon effectively suppressed CH₄ emissions in particular the initial periods (ca. 3 weeks) right after the application as compared with control soil during rice cultivation, but did not significantly affect N₂O emissions. In addition, the maximum CH₄ reduction (82% reduction over control) was found at 10 ㎎ L<SUP>-1</SUP> ethephon application right after its addition for 3 weeks during rice cultivation. Rice productivity and yield properties were mainly affected by ethephon application, enhancing ripened grains and number of grains per panicle. Soil properties were not influenced by ethephon application except for available phosphate, which is probably due to enhanced root growth in rhizosphere soils. Conclusively, ethephon could be a new and pioneering amendment for reducing CH₄ emission in particular at the initial 3 weeks after the application without increasing other GHG emissions and enhancing rice productivity in paddy soils.
( Young Hun Choi ),( Seok-ran Yeom ),( Sung-wook Park ),( Wook Tae Yang ),( Il Jae Wang ),( Won Ung Tae ),( Suck Ju Cho ),( Dae Sup Lee ),( Mun Ki Min ),( Up Huh ),( Chanhee Song ),( Yeaeun Kim ),( Yo 대한응급의학회 2024 대한응급의학회지 Vol.35 No.3
Objective: This study evaluated the accuracy of the pre-hospital shock index multiplied by the AVPU scale (PSIAVPU) as a predictor of massive transfusion (MT) and traumatic coagulopathy. Methods: This research was a retrospective single-center study that included patients consecutively presenting to a trauma center between 2017 and 2020. The predictive value of the PSIAVPU for MT, in-hospital mortality, and traumatic coagulopathy was measured using the area under the curve (AUC) of the receiver operating characteristic curve. The AUC of the PSIAVPU was compared with the Reverse Shock Index multiplied by the Glasgow Coma Scale (rSIG) measured at the trauma center presentation. Results: One thousand seven hundred and ninety-two patients were included, of which 163 patients (9.09%) received MT and 195 patients (10.88%) died during their hospital stay. Traumatic coagulopathy was observed in 245 patients. The AUC values for the PSIAVPU in terms of predicting MT, hospital mortality, and traumatic coagulopathy were 0.755, 0.752, and 0.736, respectively. Conclusion: In patients with trauma, the predictive power of the PSIAVPU was higher than that of the prehospital shock index and was comparable to that of the rSIG. The PSIAVPU is a useful indicator that can be used easily and quickly for trauma patients at the prehospital stage.
포장과 실내실험에서 살충제 Cyfluthrin 의 토양 중 반감기 차이에 미치는 환경요인 구명
한성수,최용화,임방현,임요섭 한국농화학회 2000 Applied Biological Chemistry (Appl Biol Chem) Vol.43 No.4
This study was conducted to find out the environmental factors affecting the differences in the half-life of the insecticide cyfluthrin in soil between field and laboratory tests carried out in 1998. Degradation and leaching of cyfluthrin in soil were examined under various environmental conditions that were considered to affect the residuality. Cyfluthrin was degraded 1.9 times faster in non-sterilized soil than in sterilized soil and 1.2 times at 25℃ than at 15℃. The half-lives of cyfluthrin were 61.4 days under the dark condition and 4.5 days under sunlight, and those were 11.8 days under the open condition and 23.8 days under the closed condition. The half-lives of the authentic compound and the commercial product of cyfluthrin were 15 and 1 day in the field test and 26 and 3 days in the laboratory test, respectively. Cyfluthrin was rapidly degraded with an increase in soil moisture content and decomposed faster in the alkaline solution of pH 12 than in the acidic solution of pH 3, but the half-life of cyfluthrin did not make any difference between pH 6.4 of the field test soil and pH 5.6 of the laboratory test soil. Cyfluthrin was immobile in soil from the results that 81∼94% of the initial amount remained in the 0∼2 ㎝ layer of the soil column regardless of the amount and time of rainfall after the chemical treatments. From viewing the abovementioned results, soil moisture content, sunlight and formulation type affected greatly soil microbes and volatilization affected slightly, and temperature, pH and rainfall did not affect the big difference in the half-life of cyfluthrin in soil between the field and laboratory tests in the year of 1998.
내측연수경색 환자의 정전가미이진탕(正傳加味二陳湯) 투여(投與) 1례(例)
최요섭,한진안,이경섭,윤상필,Choi, Yo-Sup,Han, Jin-An,Lee, Kyung-Sup,Yun, Sang-Pil 대한한방내과학회 2002 大韓韓方內科學會誌 Vol.23 No.2
Medial medullary infarction is caused by occlusion of vertebral artery or lower basilar artery. In this report, one case had impaired pain and thermal sense over half the body, and complained of dizziness, nausea and vomiting. The other symptoms were slippery pulse(脈滑), pale tongue with whitish coating(舌淡苔白), white face(面白), obesity(體肥) and unchanged skin color(肌色如故). We diagnosed this patient as the Gastrointestinal Phlegm(食痰) and prescribed Jengjengamiyijin-tang (Zhengchuanjiaweierchen-tang). The symptoms of impaired pain and thermal sense, dizziness, nausea, and vomiting were improved. So, we suggest that Jengjengamiyijin-tang (Zhengchuanjiaweierchen-tang) could be effective to the patient with the symptom of the Gastrointestinal Phlegm(食痰)
Hydrogen Peroxide로 손상된 배양 인체피부섬유모세포에 대한 함초추출물의 항산화 및 항독효과에 관한 연구
최유선 ( Yu Sun Choi ),김선주 ( Sun Ju Kim ),전명옥 ( Myung Ok Jeon ),유영월 ( Young Wall Ryu ),임요섭 ( Yo Sup Rim ),정인주 ( In Ju Jung ) 대한미용학회 2011 대한미용학회지 Vol.7 No.4
This study aims to evaluate the antioxidative effect and the detoxic effect of Salicornia herbacea L. (SH) extract. For the examining of antioxidative effect on SH extract, the cell viability of freeze-dried SH (FSH) extract or cold-dried SH (CSH) extract was measured after the cultured human skin fibroblasts (Detroit 551) were pretreated with SH extract for 2 hours before the treatment of hydrogen peroxide (H2O2) and also the inhibitory activity of lipid peroxidation was assessed. In the detoxic effect of SH extract, the cell viability was measured by colorimetric assay after Detroit 551 cells were pretreated with FSH extract or CSH extract before the treatment of H2O2. In this study, H2O2 significantly decreased cell viability in dose-dependently and the XTT90 and XTT50 values were determined at 15 μM and 40 μM of H2O2, respectively. In the protective effect of FSH extract against H2O2-treated group, FSH extract significantly increased cell viability, compared with H2O2-treated group, and also FSH extract showed the inhibitory activity of lipid peroxidation. While, in the detoxic effect of SH extract, FSH extract significantly increase cell viability which were decreased by methylmercuric chloride (MMC)-induced cytotoxicity, but CSH extract did not show any protective effect. From these results, it is suggested that H2O2 was highly toxic and SH extract such as FSH extract was effective in the prevention of H2O2- or MMCinduced cytotoxicity by antioxidative effect or detoxic effect. Conclusively, FS extract may be a useful agent for the beauty materials by the protective effect on a bleaching agent, H2O2 or the heavy metal as the pigment of color make-up product
Cisplatin의 세포독성에 대한 레몬밤 추출물의 억제 효과
최유선 ( Yu Sun Choi ),김선주 ( Sun Ju Kim ),유영월 ( Yeong Wol Yu ),임요섭 ( Yo Sup Rim ),황은희 ( Eun Hee Hwang ),이화정 ( Hwa Jeong Lee ),최은영 ( Eun Young Choi ),장병수 ( Byung Soo Chang ),정인주 ( In Ju Jung ) 대한미용학회 2013 대한미용학회지 Vol.9 No.1
The purpose of this study is to evaluate the protective effect of Lemon balm (Mellisa officinalis) extract on the cytotoxicity induced by cisplatin, pharmaceutic alopecia inducer. To achieve this, cisplatin-induced cytotoxicity was assessed by XTT assay after human skin fibroblasts (Detroit 551) were cultured in media containing various concentrations of cisplatin. And also, the effect of vitamin E was examined on the cisplatin-induced cytotoxicity. For the protective effect of Lemon balm extract on cisplatin-induced cytotoxicity, Detroit 551 cells were pretreated with 80 or 100 μg/mL of Lemon balm extract for 2 hours, and also, antioxidative effects of Lemon balm extract such as 1,1-diphenyl-2-picrylhydrazyl (DPPH)-radical scavenging activity and lactate dehydrogenase (LDH) activity were analysed. The results were as follows. Cisplatin showed a significant decrease of cell viability in dose dependently, and the XTT50 value was calculated at 25.7 μM. In the effect of vitamin E, it significantly increased cell viability which were decreased by the cisplatin-induced cytotoxicity. In the protective effect of Lemon balm extract on cisplatin-induced cytotoxicity, it significantly increased cell viability which was decreased by cisplatin-induced cytotoxicity, and also it showed the DPPH-radical scavenging activity and LDH inhibitory activity. Therefore, these results suggested that the cytotoxicity of cisplatin may be involved in oxidative stress, and also, Lemon balm extract effectively prevented the cytotoxicity induced by cisplatin via antioxidative effect. Conclusively, the natural extract like Lemon balm may be useful for the development as antioxidative agent via the prevention of the cytotoxicity induced by pharmaceutic alopesia inducer correlated with oxidative stress.