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( Sook Young Park ),( Seol Hwa Jang ),( Soon Ok Oh ),( Jung A Kim ),( Jae Seoun Hur ) 한국균학회 2014 Mycobiology Vol.42 No.4
Lichen studies, including biodiversity, phylogenetic relationships, and conservation concerns require definitive species identification, however many lichens can be challenging to identify at the species level. Molecular techniques have shown efficacy in discriminating among lichen taxa, however, obtaining genomic DNA from herbarium and fresh lichen thalli by conventional methods has been difficult, because lichens contain high proteins, polysaccharides, and other complex compounds in their cell walls. Here we report a rapid, easy, and inexpensive protocol for extracting PCR-quality DNA from various lichen species. This method involves the following two steps: first, cell breakage using a beadbeater; and second, extraction, isolation, and precipitation of genomic DNA. The procedure requires approximately 10 mg of lichen thalli and can be completed within 20 min. The obtained DNAs were of sufficient quality and quantity to amplify the internal transcribed spacer region from the fungal and algal lichen components, as well as to sequence the amplified products. In addition, 26 different lichen taxa were tested, resulting in successful PCR products. The results of this study validated the experimental protocols, and clearly demonstrated the efficacy and value of our KCl extraction method applied in the fungal and algal samples.
Antifungal Activity of Eucalyptus-Derived Phenolics Against Postharvest Pathogens of Kiwifruits
Oh, Soon-Ok,Kim, Jung-A,Jeon, Hae-Sook,Park, Jong-Cheol,Koh, Young-Jin,Hur, Hyun,Hur, Jae-Seoun The Korean Society of Plant Pathology 2008 Plant Pathology Journal Vol.24 No.3
Antifungal activities of natural substrances from Eucalyptus darlympleana, E. globules, E. gunnii and E. unigera were evaluated against postharvest pathogens of kiwifruits, Botrytis cinerea, Botryosphaeria dothidea, and Diaporthe actinidiae, to screen effective natural substances as an alternative to chemical fungicides. Methanol extract of the Eucalyptus trees showed strong antagonistic activity against the pathogenic fungi. Among them, E. unigera and E. darlympleana effectively inhibited mycelial growth of the pathogens. For chemical identification of the antifungal substances, the methanol extract of E. darlympleana leaves was successively partitioned with $CH_2Cl_2$, EtOAc, n-BuOH and $H_2O$. Among the fractions, $CH_2Cl_2$ and n-BuOH showed strong inhibitory activity of mycelial growth of the fungi. Five compounds were isolated from EtOAc and n-BuOH fractions subjected to $SiO_2$ column chromatography. Two phenolic compounds(gallic acid and 3,4-dihydroxybenzoic acid) and three flavonoid compounds(quercetin, quercetin-3-O-$\alpha$-L-rhamnoside, quercetin-3-O-$\beta$-glucoside) were identified by $^1H$-NMR and $^{13}C$-NMR spectroscopy. Among them, only gallic acid was found to be effective in mycelial growth and spore germination of B. cinerea at relatively high concentrations. The results suggest that gallic acid can be a safer and more acceptable alternative to current synthetic fungicides controlling soft rot decay of kiwifruit during postharvest storage.
Oh, Soon-Ok,Jeon, Hae-Sook,Lim, Kwang-Mi,Koh, Young-Jin,Hur, Jae-Seoun The Korean Society of Plant Pathology 2006 Plant Pathology Journal Vol.22 No.4
Antifungal activity of Korean and Chinese lichen-forming fungi(LFF) was evaluated against plant pathogenic fungi of Botryosphaeria dothidea, Botrytis cinerea, Diaporthe actinidiae, Pestalotiopsis longiseta, Pythium sp., Rhizoctonia solani, and Sclerotium cepivorum. The LFF were isolated from Cladonia scabriuscula, Melanelia sp., Nephromopsis asahinae, Nephromopsis pallescens, Parmelia laevior, Pertusaria sp., Ramalina conduplicans, Ramalina sinensis, Ramalina sp., Umbilicaria proboscidea and Vulpicida sp. with discharged spore method. The isolates were deposited in the herbarium of Korean Lichen Research Institute(KoLRI) in Sunchon National University. The LFF of Melanelia sp., P. laevior, Pertusaria sp., R. conduplican and Ramalina sp. exhibited strong antifungal activity against all of the pathogenic fungi examined. Among them, LFF of P. laevior showed more than 90% of inhibition in fungal hyphae growth, compared with control. The results imply that LFF can be served as a promising bioresource to develop novel biofungicides. Mass cultivation of the LFF is now under progress in laboratory conditions for chemical identification of antifungal substances.
국내 유통 소금 중의 포타슘시아니이드와 페로시아나이드염의 분석에 관한 연구
허숙진,소유섭,최장덕,이화정,최선희,성준현,임무혁,김광수,최용훈,오해성,최정희,최정실,허옥순,이진하,신동우,신현수,문병우 식품의약품안전청 2001 식품의약품안전청 연보 Vol.5 No.-
본 연구는 국내 유통 소금중의 안전성을 규명하기 위하여 천일염 54건, 재제염 보건, 가공염 33건 등 총 143건에 대하여 숲행하였다. HPLC, ICP, Mercury Analyzer 등을 이용하여 KCN, 페로시아나이드 염, 납 등 6개 성분의 항량을 측정하였으며 그 결과는 다음과 같다. [rdn-max(mean) ; m곱3 ; f(CN : ND-ND(ND), 페로시아나이드염 : ND-ND(ND), Pb . ND-1.30 (0.331), Cd :ND-0.23(0.070), Hg ND-0.35(0,035), As :ND-1.52fo.062). 또한, 신속하고도 효율적이 면서 기존의 환경부 시안분석법의 단점을 보완할 수 있는 KCN과 페로시아나이드염의 분석 조건을 계시하였으며, 천일염, 재제염, 가공염 뿐만아니라 소금이 첨가된 식품까지도 적용하기 위한 기초 자료로 활용이 가능할 것으로 사료된다. This study was conducted to confirm the safety in a total of 143 samples of salts. The contents of potassium cyanide(KCN), potassium ferrocyanide(K_(4)Fe(CN)_(6)), lead(Pb), cadmium(Cd), mercury(Hg), and arsenic(As) were determined using a high performance liquid chromatograph(HPLC), inductively coupled plasma spectrometer(ICP), and mercury analyzer. The values of cyanide complexes and metal elements in salts were as follow [min-max(mean);mg/kg] ; KCN : ND-ND(ND), Ferrocyanide salt : ND-ND(ND), Pb : ND-1.30(0.331), Cd: ND-0.23(0.070), Hg : ND-0.35(0.035), As : ND-1.52(0.062). In this study, we established efficient
Hur, Jinyoung,Lee, Pyeongjae,Moon, Eunjung,Kang, Insug,Kim, Sung-Hoon,Oh, Myung Sook,Kim, Sun Yeou Elsevier 2009 european journal of pharmacology Vol.620 No.1
<P><B>Abstract</B></P><P>Although nerve growth factor (NGF) therapy is an available option for the treatment of Alzheimer's disease, several limitations exist in its medical application. In the present study, we examined the neurotrophic effects of spicatoside A isolated from <I>Liriope platyphylla</I> on PC12 cells as well as the mechanisms involved in this process. Spicatoside A (10μg/mL) induced neurite outgrowth similar to NGF (50ng/mL). Furthermore, spicatoside A, a steroidal saponin, activated extracellular signal-regulated kinase 1/2 (ERK 1/2) and phosphatidylinositol 3-kinase (PI 3-kinase/Akt) via tyrosine receptor kinase A (TrkA), which is responsible for the induction of the neuritic process. The effects of NGF and spicatoside A on neurite outgrowth disappeared in TrkA knockdown PC12 cells by siRNA. In conclusion, neuritogenic effects resulting from spicatoside A may be involved in TrkA activation.</P>
Oh, Hea-Young,Shin, Su-Kyung,Heo, Hyoung-Sam,Ahn, Ji-Sook,Kwon, Eun-Young,Park, Jung Han Yoon,Cho, Yun-Young,Park, Hae-Jin,Lee, Mi-Kyung,Kim, Eun Jung,Jung, Un-Ju,McGregor, Robin A,Hur, Cheol-Goo,Choi New Century Health Publishers 2013 GENES AND NUTRITION Vol.8 No.3
<P>Prolonged high-fat diet leads to the development of obesity and multiple comorbidities including non-alcoholic steatohepatitis (NASH), but the underlying molecular basis is not fully understood. We combine molecular networks and time course gene expression profiles to reveal the dynamic changes in molecular networks underlying diet-induced obesity and NASH. We also identify hub genes associated with the development of NASH. Core diet-induced obesity networks were constructed using Ingenuity pathway analysis (IPA) based on 332 high-fat diet responsive genes identified in liver by time course microarray analysis (8 time points over 24?weeks) of high-fat diet-fed mice compared to normal diet-fed mice. IPA identified five core diet-induced obesity networks with time-dependent gene expression changes in liver. These networks were associated with cell-to-cell signaling and interaction (Network 1), lipid metabolism (Network 2), hepatic system disease (Network 3 and 5), and inflammatory response (Network 4). When we merged these core diet-induced obesity networks, Tlr2, Cd14, and Ccnd1 emerged as hub genes associated with both liver steatosis and inflammation and were altered in a time-dependent manner. Further, protein-protein interaction network analysis revealed Tlr2, Cd14, and Ccnd1 were interrelated through the ErbB/insulin signaling pathway. Dynamic changes occur in molecular networks underlying diet-induced obesity. Tlr2, Cd14, and Ccnd1 appear to be hub genes integrating molecular interactions associated with the development of NASH. Therapeutics targeting hub genes and core diet-induced obesity networks may help ameliorate diet-induced obesity and NASH.</P>
Ethyl benzoate 合成에 미치는 觸媒의 影響에 對한 小考
김인숙,오세종,유경희,허순자 梨花女子大學校 藥學硏究所 1967 梨花藥學硏究 Vol.- No.8
The concentrated sulfuric acid and hydrogen chloride gas which are strong acid by the Bronsted concepts, have been between benzoic acid and ethyl alcohol. In this paper we have studied about comparing with the yield and rate of the catalytic reactions on above two catalysers.