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洪淳達,石泳善,朴孝澤 충북대학교 엽연초연구소 1999 煙草硏究 Vol.17 No.-
Carbonized rice hull, perlite, and vermiculite were mixed and investigated for the probability of tobacco transplant production by means of plug and transfer float system. These seedling bed materials in condition of float system have gaseous phase ranged from 6% to 13% showing a proper growth of tobacco seedling. However compost media mixed with soil, sand, and compost in condition of float system led to the shortage of respiration in root system by very low proportion of gaseous phase skewing a wicked growth of seedling. Absorption of heat by floating water for the daytime increased rhizosphere temperature in condition of float system during the night and low temperature season resulting in better growth of tobacco seedling. Consequently transplant production of tobacco seedling by float system with mixed materials of carbonized rice hull, perlite, and vermiculite was thought to be desirable method for manufacturing production system of transplant considering the effective management of water, nutrients, and temperature of seedling bed materials.
김우성,이선화,김상엽,정동윤,김재이,이영자,이홍재,정성욱,박흥재 한국환경과학회 2003 한국환경과학회지 Vol.12 No.10
Pesticides were extracted from samples with 70% acetone and methylene chloride in order, and then cleaned up via open-column chromatography apparatus packed with fiorisil, and finally analyzed simultaneously the organophosphorus pesticides using GC/NPD, Ultra-2 and Ultra-1 fused silica capillary columns were used to separate and identify the products. Recovery of most analytes from soybean sample, taken from pesticide residues well, was greater than(80%) for all except(6) analytes. This method can simultaneously determine multiple pesticides with a high degree of accuracy and precision.
( Seon Yeong Park ),( Hong Yeul Lee ),( Hyun Kyung Lee ),( Ana Im ),( Sung Min Hong ) 대한결핵 및 호흡기학회 2020 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.128 No.-
Introduction Community-acquired pneumonia(CAP) is a leading cause of hospitalization. In 2017, Guidelines for the antibiotic use in adults with CAP in Korea suggested optimal antibiotic duration for 7 to10 days. During recent study, shorter duration of antibiotics have been evaluated. However, the duration of antimicrobial therapy in real clinic is not well established in Korea. Method Duration of antimicrobial treatment from hospital to discharge was retrospectively analyzed in tertiary university hospitals with 800 beds in the period between January 1, 2019 and May 5, 2020. We conducted medical chart review and analyzed data of antibiotic choice and duration in patients with CAP during hospitalization and at discharge. Result During the study period, total 370 patients were hospitalized with CAP. The mean(SD) total duration of antimicrobial treatment was 18.1(11.1) days. The mean(±SD) duration of total treatment was shorter in the patients without complication such as parapneumonic effusion and abscess(16.9±10.8 vs 21.1 ± 11.4; p-value 0.017). Among 271 patients in pneumonia without complication, mean(±SD) duration of total antibiotics was shorter in patients who were not treated with antipseudomal antibiotics(13.9 ±7.2 vs 19.5±12.4; p-value 0.011). Antibiotic use for optimal duration was depended on less antibiotic escalation, no use of anti-pseudomonal antibiotics and no antibiotic prescription at discharge. On hospital discharge, 81.5% of patients were prescribed antibiotics. Most commonly prescribed antibiotics at discharge was quinolone(215 of 221 prescriptions). According to the prescriptions of antibiotics at discharge, 95.4% of patients were treated for exceeding the recommended period. Conclusion Duration of antibiotic treatment in patients with CAP was excess in Korea. Optimal duration of antibiotics was depended on escalation of initial antibiotics, use of anti-pseudomonal antibiotics and prescription at discharge. In particular, most of antibiotics at discharge were overused. Thus, physicians should consider the appropriate length of antibiotic treatment at discharge.
RAW 264.7 대식세포에서 lipopolysaccharide 자극에 의한 염증성 및 산화적 스트레스에 미치는 5-aminolevulinic acid phosphate의 영향
지선영(Seon Yeong Ji),김민영(Min Yeong Kim),황보현(Hyun Hwangbo),이혜숙(Hyesook Lee),홍수현(Su Hyun Hong),차희재(Hee-Jae Cha),김희수(Heui-Soo Kim),김석만(Suhkmann Kim),최영현(Yung Hyun Choi) 한국생명과학회 2021 생명과학회지 Vol.31 No.9
5-ALA-p는 천연 아미노산인 5-ALA를 암모니아수로 용출하고 인산과 아세톤을 첨가하여 광역학 요법에 적합한 특성을 갖도록 개발된 물질이다. 그러나 항산화 및 항염증에 대한 잠재적인 기전을 포함한 약리학적 효능은 아직 명확하지 않다. 본 연구에서는 LPS로 자극된 RAW 264.7 세포에서 산화적 및 염증성 반응에 대한 5-ALA-p의 효과를 평가하였다. 본 연구의 결과에 의하면, 5-ALA-p는 LPS에 의한 RAW 264.7 세포의 과도한 식균 활성을 유의하게 억제하였고 산화적 스트레스를 약화시켰다. 5-ALA-p는 또한 LPS에 의해 감소된 미토콘드리아 생물 발생을 개선하였으며, 이는 5-ALA-p가 LPS로 인한 미토콘드리아 손상을 복원시켰음을 시사한다. 아울러 5-ALA-p는 NO와 TNF-α, IL-1β 및 IL-6과 같은 염증성 사이토카인의 생성을 현저히 억제하였으며, 이는 iNOS 및 각 사이토카인의 발현 감소와 연관성이 있었다. 나아가 5-ALA-p는 NF-κB의 핵 전이를 감소시키고 MAPKs의 인산화를 억제하여 5-ALA-p의 항염증 효과가 이들 신호전달 경로의 활성 억제와 매개되었음을 보여주었다. 이러한 결과들은 5-ALA-p가 산화적 및 염증성 스트레스를 줄이는 잠재적인 후보 약물로 적용될 수 있음을 의미한다. 5-Aminolevulinic acid phosphate (5-ALA-p) is a substance obtained by eluting 5-ALA (a natural delta amino acid) with aqueous ammonia, adding phosphoric acid to the eluate, and then adding acetone to confer properties suitable for use in photodynamic therapy applications. However, its pharmacological efficacy, including potential mechanisms of antioxidant and anti-inflammatory reactions, remains unclear. This study aimed to investigate the effects of 5-ALA-p on oxidative and inflammatory stresses in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. Our data showed that 5-ALA-p significantly inhibited excessive phagocytic activity via LPS and attenuated oxidative stress in LPS-treated RAW 264.7 cells. Furthermore, 5-ALA-p improved mitochondrial biogenesis reduced by LPS, suggesting that 5-ALA-p restores mitochondrial damage caused by LPS. Additionally, 5-ALA-p significantly suppressed the release of nitric oxide (NO) and pro-inflammatory cytokines, such as tumor necrosis factor α (TNF-α), interleukin (IL)-1β, and IL-6, which are associated with the inhibition of inducible NO synthase and respective cytokine expression. Furthermore, 5-ALA-p reduced the nuclear translocation of nuclear factor-kappa B (NF-κB) and inhibited phosphorylation of mitogen-activated protein kinases (MAPKs), indicating that the anti-inflammatory effect of 5-ALA-p is mediated through the suppression of NF-κB and MAPK signaling pathways. Based on these results, 5-ALA-p may serve as a potential candidate to reduce inflammation and oxidative stress.
추출 방법에 따른 삼나무 잎 추출물의 항산화 활성 평가
김선홍 ( Seon-hong Kim ),이수연 ( Su-yeon Lee ),조성민 ( Seong-min Cho ),홍창영 ( Chang-young Hong ),박세영 ( Se-yeong Park ),박미진 ( Mi-jin Park ),최인규 ( In-gyu Choi ) 한국목재공학회 2017 목재공학 Vol.45 No.5
This study was to investigate the antioxidant activities of Cryptomeria japonica leaves extracts such as essential oil, methanol extract and hot water extract and to evaluate its potential as a natural antioxidant. Antioxidant activities of extracts were evaluated by DPPH radical scavenging activity, FRAP activity, zanthin oxidase inhibitory activity, and iron ion chelate activity, comparing with the positive controls. According to the results, methanol and hot water extracts showed higher antioxidant activities than essential oil. This fact suggested that terpenoids have lower antioxidant effect than phenolic compounds which were found in methanol and hot water extracts. Especially, acetone and water soluble fractions of methanol extract and ethanol fraction of hot water extract contained a lot of phenolic compounds and hydroxyl group, indicating that many hydroxyl groups and glycosidic bonds showed higher antioxidant effect than the other fractions. These results can suggest that the phenolic compounds which contained hydroxyl group or glycosidic bonds have a certain role for effective antioxidant activities.
폐경기 여성의 정신건강을 위한 문학을 활용한 합리정서행동치료(REBT) 프로그램의 효과
홍영선(Yeong-Seon Hong),한금선(Kuem-Sun Han) 대한스트레스학회 2021 스트레스硏究 Vol.29 No.4
본 연구는 폐경기 여성들의 정신건강을 위해 문학을 활용한 REBT (Rational Emotive Behavior Therapy) 프로그램을 구성하여 자아존중감, 자아탄력성, 지각된 스트레스, 신체상, 우울, 상태분노, 분노표현, 및 노화불안에 미치는 효과를 규명하기 위하여 비동등성 대조군 사전사후 시차 설계로 수행되었다. 예비조사는 폐경기 여성 4명을 대상으로 4회기의 예비프로그램이 적용되었으며, 본조사는 이를 바탕으로 수행되었다. 실험군 24명, 대조군 24명을 대상으로 문학을 활용한 REBT 프로그램을 적용하여 효과를 검증한 결과, 자아존중감, 자아탄력성, 지각된 스트레스, 신체상, 우울, 상태분노, 분노표현, 및 노화불안 점수에 통계적으로 유의한 차이가 나타났다. 따라서 문학을 활용한 REBT 프로그램은 폐경기 여성의 정신건강에 효과적임이 확인되었다. Background: This study aims to investigate the effects of the REBT (Rational Emotive Behavior Therapy) program using literatures on the self-esteem, ego-resilience, perceived stress, body image, depression, state anger, anger expression, and aging anxiety on the mental health of menopausal women. Methods: This is a quasi-experimental study of non-equivalent control group pretest-posttest design. Prior to the study, four menopausal women were selected for a pilot study, and the four-session program was practiced. Based on the results, the REBT program utilizing literature for the mental health of menopausal women was conducted in the public cultural center in C city, Chungnam, semiweekly, during 90∼120 minutes per session, over 10 sessions for five weeks, from February to April 2018. The subjects were 48 menopausal women aged 45∼60 years. Of these, 24 subjects in the experimental group, and 24 subjects in the control group were intentionally sampled. The collected data were analyzed by frequency, percentage, mean, standard deviation, χ²-test, independent t-test, and paired t-test using SPSS 21.0. Results: There were statistically significant differences in self-esteem, ego-resilience, body image, depression, state anger, anger expression, and aging anxiety between the two groups. Conclusions: The results confirmed that the REBT program utilizing literature for mental health of menopausal women improved the self-esteem and ego-resilience of women and was effective in reducing perceived stress, negative body image, depression, state anger, anger expression, and aging anxiety.