폐굴껍질의 정석반응을 이용한 수중 인제거 특성

이호수,정유진,김은호,성낙창,이영형 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.2

The technology of removing phosphorous, considered as one of the most important control nutrients causing eutrophication in various water bodies, have been investigated by many researchers. Recently, phosphorous crystallization process is emerging as a new technology for phosphorous removal. In this study, waste oyster shells which can be easily obtained from the ocean, were used as a seed crystal, and their effects of several physical/chemical factors on the phosphorous removal efficiencies were examined by batch tests. Ca^(2+) and pH affected phosphorous crystallization process using waste oyster shells. As alkalinity of wastewater increased, phosphorous removal efficiencies gradually decreased. Phosphorous removal efficiencies were increased, as specific area and contact efficiency per unit area of waste oyster shells were increased. In case of high temperature, phosphorous crystallization process was rapidly advanced and phosphorous removal efficiencies were increased. Depending on X-ray diffraction analysis, it was showed that generation materials extracted from the surface of waste oyster shells with short reaction time were dominated by CaHPO₄ ·2H₂O, but progressed to Ca_(5)(OH)(PO₄)₃.

흡착제로써 폐자원을 이용한 염색폐수의 색도제거

김은호,성낙창,김수생,김국태,이영형 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.1

Dyeing has always had a pressing need for techniques that allow economical pretreatment for color removal in wastewater. The effectiveness of adsorption for color removal from dyeing wastwater has made it an ideal alternative to other expensive treatment options. This study deals with an investigation on four waste resources locally available in dyeing wastewater treatment for color removal. Peat, bentonite, slag and fly ash were utilized for this study and their performance evaluated against that of granular activated carbon. Color of dyeing wastewater was high removed in peat, bentonite and slag except for fly ash. In point of recycling, if waste resources substituted for a valuable adsorbent such as granular activated carbon, peat, bentonite and slag could look forward to an expected economical effect.

진공증착중합법에 의해 제조된 PMDA / 4,4'-DDE 폴리이미드의 내열 특성

김형권,이은학,우호환,김종석,이덕출 (사단법인)韓國火災 ·消防學會 1996 한국화재소방학회논문지 Vol.10 No.3

The Polyimide thin films based on PMDA and 4,4'-DDE were fabricated by VDPM, and their heat resistance characteristics were invastigated by TGA(Thermogaravimetry Analyzer). It was found that deposition rate decreased with increasing substrate temperature and the thin films were not fabricated over the substrate temperature of 70℃. T_TG of 5% weight loss temperature is 565℃, 397℃ and 210℃ at the substrate temperature of 20℃, 40℃ and 70℃, respectively. It is realized that the endurace temperature for 20,000 hour of thin films fabricated at 20℃ and 40℃ is 230℃ and 200℃, respectively.

멕시코와 네팔도입 고추 유전자원의 두 가지 점무늬병에 대한 저항성

조은형,김정훈,전수경,이지선,김병수 慶北大學校 農業科學技術硏究所 2005 慶北大農學誌 Vol.23 No.-

Pepper genetic resources consisting of introductions from Mexico and Nepal and susceptible and resistant controls were tested for resistance to gray leaf spot and to bacterial spot by serially inoculating the two disease pathogens, Stemphylium spp. first and Xanthomonas campestris pv. vesicatoria next, with application of fungicide after evaluation of resistance to gray leaf spot first. KC866, KC872, KC902, KC905 were resistant to gray leaf spot in addition to known resistance sources, KC43, KC47, KC220, KC319, KC320, KC380. KC897 was on the top of the resistance sources list, even better than KC177(163192), and was followed by KC889, KC896, KC898, all of which were introductions from Nepal.

韓國産 紅花子와 中國産 紅花子가 鎭痛 , 消炎 및 關節炎에 미치는 效果

서부일,이은숙,박지하,김상찬,변부형,최호영 대한본초학회 2001 大韓本草學會誌 Vol.16 No.1

This experimental study was done to compare the efficacy of Korean and Chinese Carthami Semen on analgesic effect and remedy of inflammation and arthritis. The results were as follows; 1. In analgesic action on the writhing syndrome in mice induced by 0.7% acetic acid, Korean and Chinese Carthami Semen extract group showed significant decrease in comparison with control group. And in analgesic action on the writhing syndrome in mice induced by Acetylcholine HC1, Korean and chinese Carthami Semen extract group showed significant decrease in comparison with control group. 2. In Anti-inflammatory effects, Chinese Carthami Semen extract group showed significant decrease at 150 and 180 minutes after inducing paw-edema in comparison with control group. 3. In the method of adjuvant arthritis, orally administered for 21 days, Korean Carthami Semen extract group showed significant inhibition of the hind paw edema after 1 day and 21 days. Whereas Chinese Carthami Semen extract group showed some reduction, but the results didn's show significant decrease. 4. In the level of leucocytes count, Korean and Chinese Carthami Semen extract group showed significant decrease in comparison with control group. And in the level of total protein. CRP and glucose, Korean and Chinese Carthami Semen extract group didn't showed significant change in comparison with control group.

人蔘이 卵巢摘出로 誘發된 흰쥐의 骨多孔症 예방에 미치는 효능

정국영,서부일,이은숙,변부형,신순식,박지하 대한본초학회 2004 大韓本草學會誌 Vol.19 No.1

Objectives : The present study has been undertaken to investigate the effects of Ginseng Radix on prevention of osteoporosis in ovariectomized rats. Methods : In this experiment, the rats were ovariectomized. Rats were administered by 2 kinds of medicine, Estradiol, Ginseng Radix. The levels of bone mineral density, osteocalcin, ALP, phosphorus, calcium in serum, deoxypyridinoline in urine, calcium, phosphorus, ash weight of bone, body weight and uterus weight were measured. Results : The levels of spinal bone mineral density was significantly increased in comparison with OVX group at 8 weeks in Ginseng Radix group. The levels of serum didn t show significant change in comparison with OVX group in Ginseng Radix group. The levels of urine deoxypyridinoline showed significant decrease in comparison with OVX group in Ginseng Radix group. The levels of femoral and fibula-tibial ash weight didn t show significant increase in comparison with OVX group in Ginseng Radix group. The levels of femoral and fibula-tibial calcium showed significant increase in comparison with OVX group in Ginseng Radix group. The levels of femoral and fibula-tibial phosphorus showed significant increase in comparison with OVX group in Ginseng Radix group. The levels of body weight didn t show significant changes in comparison with OVX group in Ginseng Radix group. The levels of uterus weight didn t show significant changes in comparison with OVX group in Ginseng Radix group. Conclusions : Reviewing these experimetal results, it appears that Ginseng Radix have efficacy on prevention of osteoporosis. And further study should be conducted to illustrate in depth the curing and prevention of osteoprosis.

가시 근적외선 분광법을 이용한 참외 숙도 판별 모델 개발

이혜인 ( Hye-in Lee ),김민지 ( Min-jee Kim ),이보영 ( Bo-young Lee ),이정은 ( Jeong-eun Lee ),이홍구 ( Hong-gu Lee ),박수환 ( Soo-hwan Park ),양하은 ( Ha-eun Yang ),유우형 ( Woo-hyeong Yu ),이아영 ( Ah-yeong Lee ),모창연 ( Changye 한국농업기계학회 2023 한국농업기계학회 학술발표논문집 Vol.28 No.2

참외는 한국의 여름철 대표 과일 중 하나로 후숙하지 않는 과일이다. 최근에는 수확에서 출고까지의 회전이 빨라 저장고를 거치지 않고 수확 즉시 유통하고 있다. 그러므로 참외의 수확 시기와 수확 직후의 상태는 참외 품질에 중요한 영향을 미친다. 특히 참외의 숙도는 상품성과 직결되는 당도에 가장 큰 영향을 주는 인자로써 미숙과일수록 당도가 낮아진다. 현재 참외를 재배하는 농가에서는 참외의 숙도를 외관 색깔만으로 판단하고 있다. 참외가 미숙에서 적숙으로 넘어가기 직전 시기에는 적숙과와 같은 노란색을 띠기 때문에 작업자는 수확 적기를 구분하기 어려워진다. 따라서 수확 후 품질 균일화를 위해서는 작업자의 주관적인 육안 판별보다 객관적인 품질 판정 기술이 필요하다. 본 연구에서는 참외의 숙도 판별을 위하여 가시 근적외선(VNIR) 분광 기법의 적용 가능성을 평가하고자 한다. 본 연구의 목적은 참외의 당도, 숙도 간의 상관관계와 VNIR 분광 스펙트럼 특성을 구명하고 참외 숙도 판별모델을 개발하는 것이다. 시료는 성주에서 수확한 참외로 미숙과 100개, 적숙과 132개를 이용하였다. 이는 착과 시기와 색도에 따라 미숙과-초록(stage 1), 미숙과-노랑(stage 2), 적숙과(stage 3)의 3단계로 분류하였다. 색도를 기준으로 더 익은 면을 앞면으로 설정하여 장축을 2부분으로 나누었으며, 단축은 꼭지부, 중앙부, 배꼽부 3부분으로 나누어 한 개체당 총 6 부위의 스펙트럼을 획득하였다. 분광 스펙트럼은 100W의 할로겐 광원과 USB4000 분광기(Ocean Optics, USA)를 이용하여 투과식으로 측정하였다. 참외 숙도 판별을 위하여 부분최소제곱 판별분석(Partial Least Squares-Discriminant Analysis, PLS-DA)모델을 개발하였으며, 분석에는 472~1,100nm의 파장 대역을 사용하였다. 그 결과, 판별 정확도 0.80의 우수한 성능을 보였다. 따라서 VNIR 분광 스펙트럼을 이용한 참외의 숙도 판별이 가능할 것으로 판단된다. 본 연구의 결과는 향후 참외의 수확 후 품질 균일화 및 품질 정보 제공 기술로 활용할 수 있을 것으로 기대된다.

Diversity and abundance of mosquitoes in six urban parks of South Korea: Insect-specific flavivirus (ISF) infection

Eun Jung Lee,Byung-Eon Noh,Seong-Chan Yang,Hyunwoo Kim,Se-Jin Jeong,Jin-Hwan Jeon,Shin-Hyeong Cho,Wook-Gyo Lee 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.10

The members of the genus Flavivirus are noteworthy, as they cause infectious diseases in humans, such as Zika, denguefever, yellow fever, West Nile, and Japanese encephalitis. Due to the increased awareness of the public health risk posedby flavivirus-infected mosquitoes, mosquito collections were performed in six urban parks of South Korea, as the parksare designated for human recreation but also provide suitable habitats for mosquitoes. We examined the diversity andabundance of mosquito species and conducted molecular diagnostics for the detection of flavivirus infections. Monthlycollections were carried out in each park from March to August in 2017. A total of 4,851 mosquitoes (5 genera and13 species) were collected using BG-sentinel traps and then investigated for flavivirus infections. Pathogenic flavivirusinfections causing human diseases were not observed in the field-collected mosquitoes. However, insect-specific flavivirus(ISF) infections were detected in several mosquito pools. ISF has been previously known to enhance or suppress the replicationof medically important flaviviruses in co-infected mosquito cells. In this study, partial sequences of ISF were analyzed.However, further studies are needed in order to determine its genetic characterization and biological function in vivo.

Longevity and Stress Resistant Property of 6-Gingerol from Zingiber officinale Roscoe in Caenorhabditis elegans

( Eun Byeol Lee ),( Jun Hyeong Kim ),( Chang Wan An ),( Yeong Jee Kim ),( Yun Jeong Noh ),( Su Jin Kim ),( Ju-eun Kim ),( Abinash Chandra Shrestha ),( Ha-neul Ham ),( Jae-yoon Leem ),( Hyung-kwon Jo ) 한국응용약물학회 2018 Biomolecules & Therapeutics(구 응용약물학회지) Vol.26 No.6

In order to discover lifespan-extending compounds made from natural resources, activity-guided fractionation of Zingiber officinale Roscoe (Zingiberaceae) ethanol extract was performed using the Caenorhabditis elegans (C. elegans) model system. The compound 6-gingerol was isolated from the most active ethyl acetate soluble fraction, and showed potent longevity-promoting activity. It also elevated the survival rate of worms against stressful environment including thermal, osmotic, and oxidative conditions. Additionally, 6-gingerol elevated the antioxidant enzyme activities of C. elegans, and showed a dose-depend reduction of intracellular reactive oxygen species (ROS) accumulation in worms. Further studies demonstrated that the increased stress tolerance of 6-gingerol-mediated worms could result from the promotion of stress resistance proteins such as heat shock protein (HSP-16.2) and superoxide dismutase (SOD-3). The lipofuscin levels in 6-gingerol treated intestinal worms were decreased in comparison to the control group. No significant 6-gingerol-related changes, including growth, food intake, reproduction, and movement were noted. These results suggest that 6-gingerol exerted longevity-promoting activities independently of these factors and could extend the human lifespan.

Platelet-Activating Factor Antagonistic Activity and ^13C NMR Assignment of Pregomisin and Chamigrenal from Schisandra chinensis

Lee, Im-Seon,Jung, Keun-Young,Oh, Sei-Ryang,Kim, Dong-Seon,Kim, Jung-Hee,Lee, Jung-Joon,Lee, Hyeong-Kyu,Lee, Seung-Ho,Kim, Eun-Hee,Cheong, Chae-Joon The Pharmaceutical Society of Korea 1997 Archives of Pharmacal Research Vol.20 No.6

In the course of searching for PAF receptor antagonists, pregomisin (1) and chamigrenal (2) were isolated from the fruits of Schizandra chinensis Baill by the bioactivity-guided isolation. Both compounds showed PAF antagonistic activity and the $IC_{50}$ values were $4.8{\times}10^{-5} M and 1.2{\times}10^{-4}M,$ respectively. In addition, the $^{13}C$ NMR assignments of 1 and 2 using DEPT, HMQC, COLOC and HMBC were reported for the first time.