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연구논문 : 수산폐기물인 미더덕껍질 용매 추출물의 항산화 및 항고혈압 활성
이상미 ( Sang Mee Lee ),이예람 ( Ye Ram Lee ),조광식 ( Kwang Sik Cho ),박수연 ( Soo Yun Park ),장은영 ( Eun Young Jang ),황대연 ( Dae Youn Hwang ),정영진 ( Young Jin Jung ),손홍주 ( Hong Joo Son ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.7
Styela clava tunic is generated in large amounts as a waste from S. clava processing plants and leads to environmental problems. It destroys the beach scenery and causes a bad smell and pollution by trashing on the seashore. Therefore, purpose of this study was to investigate antioxidant and antihypertensive activities of different solvent extracts from S. clava tunic for recycling of fishery waste. Antioxidant and antihypertensive activities of all extracts were concentration-dependent. Of extracts, hot water extract showed the highest DPPH radical scavenging activity with the lowest effective concentration (EC50) value (0.733 mg/ml). Chloroform extract exhibited the highest metal chelation activity with the lowest EC50 value (2.696 mg/ml). Autoclaved water extract showed the highest NO radical scavenging activity with the lowest EC50 value (0.491 mg/ml) and n-hexane extract showed the highest reducing power (A700=1.897 at 100 mg/ml). And n-butanol extract showed the highest SOD-like activity with the lowest EC50 value (19.116 mg/ml) and ACE inhibition activity with the lowest inhibitory concentration(IC50) value (0.149 mg/ml). These results indicate that extracts obtained from S. clava tunic may potential candidate to reduce diseases caused by various oxidative stresses and hypertension.
이상미(Sang-Mi Lee),이은영(Eun-Young Lee),강애리(Ae-Ri Kang),안영미(Young-Mee Ahn) 한국생활환경학회 2012 한국생활환경학회지 Vol.19 No.6
A cross sectional explorative study was conducted to invest the relationship between the temperature and humidity of the environment that newborns were l℃ated at and the central and peripheral body temperatures of newborns in hospitalized newborns using a primary dataset on 199 high-risk infants. Data was collected on the temperature (℃) and humidity (%) of the environments (incubator, radiant warmer and room), the temperatures (℃) from the central part (right upper quadrant of abdominal surface) and the peripheral part (dorsal surface of hand) of newborns. As well the weight and length was deducted from main dataset with general characteristics of newborns. The result showed that all of newborn revealed the peripheral hypothermia regardless of 88% of them in normothermia, 9% in hypothermia and 3% in hyperthermia. The low humidity of the environment, rather than the low environmental temperature of either incubator or radiant warmer, was mainly responsible for the massive peripheral hypothermia. Proper environmental humidity should be provided to maintain the normothermia of entire body system in high-risk newborns at NICU.
수산폐기물 재활용을 위한 미더덕껍질 용매 추출물의 생리활성 탐색
이상미 ( Sang Mee Lee ),강은진 ( Eun Jin Kang ),고태훈 ( Tae Hun Go ),정성윤 ( Seong Yun Jeong ),박근태 ( Geun Tae Park ),이희섭 ( Hee Sup Lee ),황대연 ( Dae Youn Hwang ),정영진 ( Young Jin Jung ),손홍주 ( Hong Joo Son ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.1
Styela clava tunic is generated in large amounts as a waste from S. clava processing plants and causes environmental problem. Although biological activities of S. clava were reported by many investigators, study on S. clava tunic was little. In this study, therefore, tyrosinase inhibition and antioxidative activities of extracts from S. clava tunic using different solvent were investigated for recycling of the fishery waste. Among extraction methods tested, autoclaved extraction (25.7%) and hot water extraction (18.2%) appeared to be effective for extraction. The highest total phenolic content was 46.6 mg/g in autoclaved extract while the highest flavonoid content was 23.0 mg/g in chloroform extract. All extracts possessed tyrosinase inhibition activity and the inhibition activity was concentration-dependent. Inhibition concentration (IC50) against tyrosinase activity was 0.36×104 mg/ml in ethanol extract, 0.11×103 mg/ml in acetone extract and 0.27 mg/ml in n-butanol extract. Among extracts tested, hot water and autoclaved extracts displayed higher antioxidative activity than organic solvent extracts. Therefore, our data suggest that extract from S. clava tunic may potential candidate for cosmetic product with whitening effect and medicine for diseases caused by various oxidative stresses.
이나리 ( Na Ri Lee ),이상미 ( Sang Mee Lee ),고태훈 ( Tae Hun Go ),정성윤 ( Seong Yun Jeong ),홍창오 ( Chang Oh Hong ),김근기 ( Keun Ki Kim ),박현철 ( Hyean Cheal Park ),이상몽 ( Sang Mong Lee ),김용균 ( Young Gyun Kim ),손홍주 ( 한국환경과학회 2013 한국환경과학회지 Vol.22 No.6
This study was carried out to investigate changes of protease and amylase activities and nitrogen content in Chungkookjang prepared by Bacillus subtilis S8 and different soybean. Amino-type nitrogen and ammonia-type nitrogen contents increased with an increase in fermentation time and was the highest in black soybean Chungkookjang. The number of viable cells increased up to 24 h of fermentation at all temperatures tested; especially, their levels were the highest at 40℃. Protease activity was the highest in black soybean Chungkookjang. α-amylase activity increased significantly up to 6 h of fermentation at 30℃ and 40℃ and then maintained constantly. It also increased up to 30-36 h of fermentation at 45℃ and then decreased. β -amylase activity was the highest in black soybean Chungkookjang at 35℃and 40℃ and in yellow soybean Chungkookjang at 45℃. Production pattern of reducing sugar was similar to that of β-amylase. Amino-type nitrogen, viable cell number and reducing sugar content and β-amylase activity was the highest in Chungkookjang fermented at 40℃. Considering amino-type and ammonia-type nitrogen contents, Chungkookjang fermentation using yellow soybean was favorable. However, the fermentation using black soybean was favorable, considering protease and amylase activities and reducing sugar content.
환경친화적 미생물농약으로서의 잠재성을 가진 세균의 분리 및 특성
이예람(Ye-Ram Lee),이상미(Sang-Mee Lee),장은영(Eun-Young Jang),홍창오(Chang-Oh Hong),김근기(Keun-Ki Kim),박현철(Hyean-Cheal Park),이상몽(Sang-Mong Lee),김용균(Young-Gyun Kim),손홍주(Hong-Joo Son) 한국생명과학회 2015 생명과학회지 Vol.25 No.12
화학농약의 오남용은 환경오염을 유발하고, 사람의 건강에 악영향을 미치므로 그 대안으로 미생물을 이용한 생물학적 방제에 대한 관심이 높아지고 있다. 본 연구에서는 환경에서 안정성을 유지할 수 있는 생물방제균을 확보하기 위하여 잿빛곰팡이병균인 Botrytis cinerea의 생육을 억제할 수 있는 Bacillus 속 균주를 탐색한 후, 선정된 균주의 항진균 물질 생산을 위한 조건, 항진균 기작 및 물리화학적 안정성에 대하여 조사하였다. 가장 높은 항진균 활성을 가진 균주는 고추의 근권 토양에서 분리된 AF4 균주였으며, 표현형적 특성 및 16S rRNA 유전자 염기서열에 근거하여 동정한 결과, Bacillus subtilis로 확인되었다. AF4 균주는 최적 탄소원으로 glycerol을, 최적 질소원으로 casein을 요구하였으며, 25-40℃ 및 pH 7-10에서 항진균 활성을 나타내었다. 최적조건에서 항진균 활성은 140±3 AU/ml로, 기본배지보다 활성이 증가했음을 알 수 있었다. AF4 균주는 B. cinereas 균사를 형태적으로 변화시킴으로써 항진균 효과를 나타내는 것으로 추정되었으며, 다양한 식물병원성 곰팡이의 생육을 억제할 수 있었다. 또한 AF4 균주가 생성하는 항진균 물질은 열, pH, 유기용매 및 단백질 분해효소 처리에도 항진균 활성을 유지하였으므로 대단히 안정한 물질인 것으로 판단되었다. 따라서 Bacillus subtilis AF4는 다양한 곰팡이유래 식물질병방제에 적용가능성이 높은 균주임을 알 수 있었다. In this study, to retain a stable bacterial inoculant, Bacillus strains showing antifungal activity were screened. The improved production, antifungal mechanism, and stability of the antifungal metabolite by a selected strain, AF4, a potent antagonist against phytopathogenic Botrytis cinerea, were also investigated. The AF4 strain was isolated from rhizospheric soil of hot pepper and identified as Bacillus subtilis by phenotypic characters and 16S rRNA gene analysis. Strain AF4 did not produce antifungal activity in the absence of a nitrogen source and produced antifungal activity at a broad range of temperatures (25-40°C) and pH (7-10). Optimal carbon and nitrogen sources for the production of antifungal activity were glycerol and casein, respectively. Under improved conditions, the maximum-antifungal activity was 140±3 AU/ml, which was higher than in the basal medium. Photomicrographs of strain AF4-treated B. cinerea showed morphological abnormalities of fungal mycelia, demonstrating the role of the antifungal metabolite. The B. subtilis AF4 culture exhibited broad antifungal activity against several phytopathogenic fungi. The antifungal activity was heat-, pH-, solvent-, and protease- stable, indicating its nonproteinous nature. These results suggest that B. subtilis AF4 is a potential candidate for the control of phytopathogenic fungi-derived plant diseases.