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A CATALOG OF AGB STARS IN IRAS PSC
Suh, Kyung-Won,Kwon, Young-Joo The Korean Astronomical Society 2009 Journal of The Korean Astronomical Society Vol.42 No.4
We make a new catalog of AGB stars in our Galaxy from the sources listed in the Infrared Astronomical Satellite (IRAS) point source catalog (PSC) compiling the lists of previous works with verifying processes. We verify the class identification of AGB stars into oxygen-rich and carbon-rich stars using the information from recent investigations. For the large sample of AGB stars, we present infrared two-color diagrams from the observations at near infrared bands and IRAS PSC. On the two-color diagrams, we plot the tracks of theoretical radiative transfer model results with increasing dust shell optical depths. Comparing the observations with the theoretical tracks, we discuss the meaning of the infrared two-color diagrams.
Development of PCR - Based Screening Methods for Macrolide Type Polyketides in Actinomycetes
Suh, Joo Won,HYUN, CHANG GU 한국농화학회 1999 Applied Biological Chemistry (Appl Biol Chem) Vol.42 No.3
About two thirds of the naturally occurring antibiotics have been discovered from actinomycetes. Therefore, the probability of discovering further new antibiotics from actinomycetes is declining as many known metabolites are isolated repeatedly. However, various efforts leave been made in order to enhance the probability of discovering novel compounds. In the present study, we have developed new screening strategies based on the antibiotic biosynthetic pathway, and the genetic information, utilizing polymerase chain reaction. We have selected macrolide type polyketides. In order to divide the ansamycin group antibotic of macrolide type polyketides, we have selected 3-amino-5-hydroxybenzoic acid (AHBA) moiety which contains a biosynthetically unique structural element in the group as a target molecules. Oligonucleotide primers were designed to amplify DNA fragments of macrolide type polyketide synthase and AHBA synthase genes from fourteen actinomycetes species. This method was successfully applied to all three of the known macrolide type polyketide produccing actinomycetes tested. In addition, it also identified the presence of potential macrolide type polyketide producing genes from seven actinomycetes that were known to produce none of macrolide type polyketides, and AHBA biosynthetic genes in one actinomycetes. This technique is potentially useful for the screening of new antibiotices and cloning of their biosynthetic genes.
Left Ventricular Thrombus and Subsequent Thromboembolism, Comparison of Treatment Modalities (초)
( Joo Myung Lee ),( Jin Joo Park ),( Hee Won Jung ),( Young Seok Cho ),( Il Young Oh ),( Chang Hwan Yoon ),( Jung Won Suh ),( Eun Ju Chun ),( Sang Il Choi ),( Tae Jin Youn ),( Cheong Lim ),( Goo Yeong 대한내과학회 2012 대한내과학회 추계학술대회 Vol.2012 No.1
Suh, Joo-Won,Lee, Seung-Soo,Han, Jeong-Wun,Yang, Young-Yell,Hong, Soon-Kwang,Lee, In-Hyung The Microbiological Society of Korea 2002 The journal of microbiology Vol.40 No.2
The 5.8 kb pMMH1, rolling-circle replication (RCR) plasmid of the wild type soil Bacillus mesentericus was developed into a novel secretion vector system in Bacillus subtilis. The pMMHl turned out to have a replication origin and two open reading frames (ORFs) of the putative γ-GTP and type I signal peptidase (sipP). To characterize the regions necessary for plasmid stability and high copy number, five vectors (pPS, pPP, pEN, pMN, pME) were constructed by disruption or deletion of each region in pMMH1. Like pMMHl all constructed vectors were stable over 100 generations In a non-selective medium. Since pPS was the smallest (2.3 kb)of all, it was selected for the construction of a navel secretion vector, Using the $\alpha$-amylase promoter/signal sequence of B. subtilils the novel plasmid pJSN was constructed. When $\beta$-glucosidase was expressed using pJSN, we found $\beta$-glucosidase activity in the medium. This result strongly suggested that plasmid pJSN can be used for the production of bioactive peptides in B. subtilis.