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Seung Hwa Yoo,Sang Yeon Lee,Jin Keum Kim,Myeong Ran Lee,Young Deok Kim,Nam Sin Kim,Jin Yeol Cha 한국조류학회II 2016 한국조류학회지 Vol.23 No.1
The Investigation of Natural Environment; INE is conducted for the current status of national ecosystem and environment and for the renewal of ecological and natural map which serve the basic information for effective management of natural environment, rep. of Korea. Survey spot and line, time, duration are selected by each investigator in the current bird survey of INE. This study is conducted for the development of effective survey method. For the selection of suitable survey duration, we analyze the bird census result in each 10 minute according to the sites inland, subalpine, civilian control zone and large and small islands. The bird surveys are conducted from April to October in 2014. If we have no restriction of survey, we conducted the bird survey during 2 hours. The more survey duration the more the number of recorded bird species. However, additional newly recorded bird species are reduced. The number of newly recorded bird species is not reduced until 2 hours in the inland area and large island area. On the contrary, The number of newly recorded bird species is reduced after 1 hour in the subalpine and civilian control zone because of restriction of survey area and habitat types. The number of endangered species during 1 hour are detected 80% of the result of 2 hours continuous survey. It is needed that bird survey maintain over 1 hour in each survey site for the enough result to understand avifauna, but several survey area and relatively short survey duration are needed in subalpine and forest area which contains low diversity of habitat. The fourth investigation of Natural Environment focused on detailed mapping of the ecological and natural map. For the next step, Quantitative survey method which considering fixed survey spot, line, survey time and duration will be needed in the bird monitoring by using stationary survey quadrat.
Gluconobacter melanogenus 폴리올 탈수소 효소의 정제 및 특성에 대한 연구
김강화,조남철,전덕영 생화학분자생물학회 1994 BMB Reports Vol.17 No.3
From cytoplasm and cell membrane of Gluconobacter melanogenus NAD(P) independent polyol dehydrogenases were purified by polyethylene glycol precipitation, conventional CM-cellulose and DEAE-Sephacel column, and HPLC SP column chromatography. The two enzymes gave same subunit structure, same absorption spectrum, and similar substrate specificity. The enzyme showed a characteristic absorption spectrum of cytochrome c showing maxima at 552, 522, and 418 nm. The oxidized cytochrome component of the enzyme was rapidly reduced by a substrate, D-mannitol. Based on SDS-PAGE, the purified enzyme was composed of three different subunits having Mr of 63 K, 52 K and 20.5 K, respectively. The second subunit (Mr 52 K) showed oxidized cytochrome c absorption spectrum. The enzyme had a restricted substrate specificity toward the polyols having D-lyxo configuration like D-mannitol and D-sorbitol showing higher activity on D-mannitol.
폐암의 병기결정에 있어서 컴퓨터 단층촬영(CT)과 감마 카메라를 이용한 양전자방출 단층촬영(PET)의 민감도와 특이도의 비교연구
문광덕,이철주,김영진,최호,김정태,강준규,홍준화,박찬희,윤석남 아주대학교 의과학연구소 1999 아주의학 Vol.4 No.1
A retrospective study was undertaken to compare sensitivities and speciticities of computed tomography (CT) scan and radiolabeled glucose analog ^(18)F-fluoro-2-deoxy-D-glucose (FDG) camera based positron emission tomography (PET). Nine patients with lung cancer who underwent preoperative CT and ^(18)F-FDG coincidence PET scanning were evaluated retrospectively. Imaging studies were read prospecdvely and blinded to the surgical and pathologic data. The final diagnosis was established by histopathologic examination at thoracotomy. CT was accurate in 7 patients (77.8%), with understaging in 1 patient and overstaging in 1 patient. In detection of locally advanced disease (N2/N3), the sensitivity, specificity, positive predictive value and negative predictive value were 50%, 85.7%, 50% and 85.7%, respectively. On the other hand, ^(18)F-FDG-PET was accurate in 8 patients (88.9%), with overstaging in 1 patient and without any understaging. In detection of locally advanced disease (N2/N3), the sensitivity, specificity, positive predictive value and negative predictive value were 100%, 85.7%, 66.7% and 100%, respectively. ^(18)F-FDG-PET was significantly more accurate than CT in lymph node staging of lung cancer. The high negative predictive value of FDG-PET could reduce a need for invasive surgical staging (ISS).
Purification and Characterization of Polyol Dehydrogenase from Gluconobacter melanogenus
조남철,김강화,전덕영,Cho, Nam-Chul,Kim, Kang-Hwa,Jhon, Deok-Young 생화학분자생물학회 1990 한국생화학회지 Vol.23 No.2
Gluconobacter melanogenus의 세포질과 세포막으로부터 NAD(P) 비요구성 폴리올 탈수소 효소를 분리하여 순차적으로 CM-셀롤로오즈의 통과, 풀리에칠렌 글리콜 침전, DEAE-Sephacel 컬럼의 통과, SP-5 PW 컬럼을 이용한 HPLC를 행하여 정제하였다. 정제된 효소는 소단위의 구조, 흡수 스펙트럼이 서로 같았고 기질특이성은 유사하였다. 이 효소는 시토크륨 C특유의 552, 522, 418 nm에서 흡수 피크를 갖는 흡수 스펙트럼을 보였다. 효소 중의 산화된 시토크롬 성분은 기질인 만니톨에 의하여 빠르게 환원되었다. 두 효소는 모두가 SDS-전기영동에 의하여 분자량이 63 K, 52 K, 20.5 K인 소단위로 구성되어 있음을 보였다. 그 중에서 분자량이 52 K인 소단위가 산화된 시토크롬 C와 같은 흡수 스펙트럼을 나타냈다. 이 효소는 제한된 기질특이성을 보였는데 D-lyxo 구조를 갖는 기질인 만니톨이나 솔비톨에 대하여만 효소활성을 보였으며 특히 만니톨에 대한 활성도가 컸다. From cytoplasm and cell membrane of Gluconobacter melanogenus NAD(P) independent polyol dehydrogenases were purified by polyethylene glycol precipitation, conventional CM-cellulose and DEAE-Sephacel column, and HPLC SP column chromatography. The two enzymes gave same subunit structure, same absorption spectrum, and similar substrate specificity. The enzyme showed a characteristic absorption spectrum of cytochrome c showing maxima at 552, 522, and 418 nm. The oxidized cytochrome component of the enzyme was rapidly reduced by a substrate, D-mannitol. Based on SDS-PAGE, the purified enzyme was composed of three different subunits having Mr of 63 K, 52 K and 20.5 K, respectively. The second subunit (Mr 52 K) showed oxidized cytochrome c absorption spectrum. The enzyme had a restricted substrate specificity toward the polyols having D-lyxo configuration like D-mannitol and D-sorbitol showing higher activity on D-mannitol.
효모 중 아스코르브산을 포함하는 혼합기능 산화계를 억제하는 새로운 항산화 단백질의 존재에 관한 연구
김강화,조남철,전덕영 ( Kang Hwa Kim,Nam Chul Cho,Deok Young chon ) 생화학분자생물학회 1990 BMB Reports Vol.23 No.3
Antioxidant activity which specifically inhibits the mixed-function oxidation(MFO) system comprised of ascorbate, Fe(III), and O₂ was found from both extracts of Saccharomyces cerevisiae and Candida pseudotropicalis. From crude extracts of the yeast three different antioxidant activities against MFO systems containing dithiothreitol (DTT) or ascorbate as an electron donor could be separated by a HPLC-DEAE column chromatography. Antioxidant activity of the fraction eluted at 0.22 M potassium chloride from both yeast preparations selectively inhibited the ascorbate/Fe(III)/O₂ MFO system. It differed from catalase activity which inhibits DTT/Fe(III)/O₂ and ascorbate/Fe(III)/O₂ MFO systems with similar extent and thiol-specific antioxidant activity which was reported from S. cerevisiae and inhibits DTT/Fe(III)/O₂ MFO system specifically. The active fraction showed no catalase activity and did not carry immunoreactive protein which specifically reacts with antibody against thiol-specific antioxidant protein. The results suggest that there is another type of antioxidant protein besides catalase and thiol-specific antioxidant protein in yeast.
Gamma-Irradiation Enhances RECK Protein Levels in Panc-1 Pancreatic Cancer Cells
김나영,이정은,장효진,임채승,Deok Hwa Nam,민본홍,박길홍,오준서 한국분자세포생물학회 2008 Molecules and cells Vol.25 No.1
Radiotherapy is an important treatment for many malignant tumors, but there are recent reports that radiation may increase the malignancy of cancer cells by stimulating expression of type IV collagenases. In this study, we examined changes in matrix metalloproteinase (MMP) inhibitors, such as the tissue inhibitors of metalloproteinase (TIMP)-1, TIMP-2 and RECK, in response to irradiation in Panc-1 pancreatic cancer cells. Irradiation increased RECK protein levels but not mRNA levels, whereas no significant changes were found in TIMP-1 and TIMP-2. The enhanced RECK protein levels were associated with an increase in MMP inhibitory activity. However, irradiation slightly but reproducibly increased the invasiveness of the Panc-1 cells. Like irradiation, treatment of Panc-1 cells with transforming growth factor (TGF)-β1 led to a 2-fold increase in RECK protein levels. Transient transfection with Smad3 also increased RECK protein levels, but transfection with Smad7 markedly reduced them. Stable expression of Smad7 and treatment with SB431542, an inhibitor of TGF-β receptor I kinase, abolished TGF-β1- and radiation-mediated effects on RECK. Furthermore, irradiation increased levels of phosphorylated Smad3. We conclude that radiation post-transciptionally enhances RECK protein levels in Panc-1 cells, at least in part, via TGF-β signaling, and that irradiation increases Panc-1 invasiveness via a mechanism that may not be linked to MMP-2 activity
Gluconobacter melanogenus 폴리올 탈수소 효소의 정제 및 특성에 대한 연구
조남철,김강화,전덕영 ( Nam Chul Cho,Kang Hwa Kim,Deok Young Jhon ) 생화학분자생물학회 1990 BMB Reports Vol.23 No.2
From cytoplasm and cell membrane of Gluconobacter melanogenus NAD(P) independent polyol dehydrogenases were purified by polyethylene glycol precipitation, conventional CM-cellulose and DEAE-Sephacel column, and HPLC SP column chromatography. The two enzymes gave same subunit structure, same absorption spectrum, and similar substrate specificity. The enzyme showed a characteristic absorption spectrum of cytochrome c showing maxima at 552, 522, and 418 nm. The oxidized cytochrome component of the enzyme was rapidly reduced by a substrate, D-mannitol. Based on SDS-PAGE, the purified enzyme was composed of three different subunits having Mr of 63 K, 52 K and 20.5 K, respectively. The second subunit (Mr 52 K) showed oxidized cytochrome c absorption spectrum. The enzyme had a restricted substrate specificity toward the polyols having D-lyxo configuration like D-mannitol and D-sorbitol showing higher activity on D-mannitol.