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권이슬,임정한,이홍금,표석능 한국응용약물학회 2016 Biomolecules & Therapeutics(구 응용약물학회지) Vol.24 No.1
Lichens have been known to possess multiple biological activities, including anti-proliferative and anti-inflammatory activities. Vascular cell adhesion molecule-1 (VCAM-1) may play a role in the development of atherosclerosis. Hence, VCAM-1 is a possible therapeutic target in the treatment of the inflammatory disease. However, the effect of lobaric acid on VCAM-1 has not yet been investigated and characterized. For this study, we examined the effect of lobaric acid on the inhibition of VCAM-1 in tumor necrosis factor-alpha (TNF-α)-stimulated mouse vascular smooth muscle cells. Western blot and ELISA showed that the increased expression of VCAM-1 by TNF-α was significantly suppressed by the pre-treatment of lobaric acid (0.1-10 μg/ml) for 2 h. Lobaric acid abrogated TNF-α-induced NF-κB activity through preventing the degradation of IκB and phosphorylation of extracellular signalregulated kinases (ERK), c-Jun N-terminal kinases (JNK), and p38 mitogen activated protein (MAP) kinase. Lobaric acid also inhibited the expression of TNF-α receptor 1 (TNF-R1). Overall, our results suggest that lobaric acid inhibited VCAM-1 expression through the inhibition of p38, ERK, JNK and NF-κB signaling pathways, and downregulation of TNF-R1 expression. Therefore, it is implicated that lobaric acid may suppress inflammation by altering the physiology of the atherosclerotic lesion.
소형챔버법과 데시케이터법을 이용한 목재제품 폼알데하이드 방출 특성과 상관성 연구
권이슬,김아롱,심인근,이종천,정현미,류정민 한국생활환경학회 2019 한국생활환경학회지 Vol.26 No.6
This study assesses the characteristic and correlation of formaldehyde emission from composite wood products such as plywood, medium density fiberboard(MDF) and particle board(PB) using different types of test methods; 20L small-scale chamber and 24-hour desiccator method. Because composite wood products are manufactured using urea-formaldehyde resin(UF), it emits a lot of formaldehyde from the surface. Composite wood products are commonly used in the manufacture of furniture, cabinets and flooring with the surface finishing materials. So, it is necessary to test the effect of the surface finishing materials. The results of this study were as follows; 1) Formaldehyde emission was concerned with surface finishing methods. 2) There is a high correlation between small chamber and desiccator method to measure the formaldehyde emission.
살코스키 시약과 Indole-3-acetic Acid의 반응 중 트립토판의 간섭
이슬 ( Seul Lee ),어나미까커날 ( Anamika Khanal ),여준구 ( Junkoo Yeo ),노그라도캐시린 ( Kathyleen Nogrado ),조아현 ( Ahyeon Cho ),송윤진 ( Yoonjin Song ),권미지 ( Miji Kwon ),이지훈 ( Ji-hoon Lee ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
Indole-3-acetic acid (IAA) is the most common auxin hormone produced in the plant and is very important because it regulates various aspects of plant growth and development. Tryptophan is the main precursor for IAA while IAA can be synthesized by two pathways i.e., tryptophan-dependent pathway and tryptophan-independent pathway. There have been many studies using Salkowski regent to measure the IAA production by bacteria. In this study, we have found that there was the interference of tryptophan on the colorimetric estimations of indole-3-acetic acid (IAA) by using Salkowski reagent (35% HClO4 and 10 mM FeCl3), which developed a pink color complex of tris-(indole-3-acetate) iron(III) with IAA. Moreover, we detected the effect of different concentration of tryptophan (100, 200, and 300 μM) on different concentration of IAA (100, 200, and 300 μM). The absorbance on IAA for the tested concentrations was found to be increased with the increasing concentration of tryptophan. It seems that both the IAA and tryptophan show the maximum absorbance at the similar wavelengths. It was also observed that the difference between the predicted and measured concentrations of IAA became larger as the predicted IAA concentration decreased. From this study, it is expected that tryptophan would interfere with accurate measurements of IAA, and therefore care should be taken for the measurement of IAA generated by the precursor, tryptophan.
중금속 오염 토양에서 분리한 니켈 내성 균주의 동정과 유전체 분석을 통한 잠재적 기작 연구
이슬 ( Seul Lee ),( Anamika Khanal ),여준구 ( Junkoo Yeo ),( Kathyleen Nogrado ),조아현 ( Ahyeon Cho ),송윤진 ( Yoonjin Song ),권미지 ( Miji Kwon ),이지훈 ( Ji-hoon Lee ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
The widespread use of metals influenced many researchers to examine the relationship between heavy metal toxicity and bacterial resistance. In this study, we have inoculated heavy metal contaminated soil from Jang-hang region of South Korea in the nickel-containing media (20 mM Ni) for the enrichment. Among dozens of the colonies acquired from the several transfers and serial dilutions with the same concentrations of Ni, 3 colonies with morphological differences were chosen for further studies, which were named as strains Ni-a, Ni-2 and Ni-3. The isolates were identified for their phylogenetic affiliations by using 16S rRNA gene analysis. The strains Ni-2 and Ni-3 were close to Cupriavidus metallidurans and were found to be resistant to antibiotics of vancomycin, erythromycin, chloramphenicol, ampicillin, gentamicin, streptomycin and kanamycin by disk diffusion method. Of the isolated strains, Ni-2 was sequenced for the whole genome, since the Ni-resistance seemed to be better than the other two strains. From the genome sequence we have found that were a total of 89 metal-resistance-related genes including 11 Ni-resistance genes, 41 heavy metal (As, Cd, Zn, Hg, Cu, and Co)-resistance genes, 22 cation efflux genes, 4 metal pumping ATPase genes, and 11 metal transporter genes.