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Rapid Variable-Number Tandem-Repeat Genotyping for Mycobacterium leprae Clinical Specimens
Kimura, M.,Sakamuri, R. M.,Groathouse, N. A.,Rivoire, B. L.,Gingrich, D.,Krueger-Koplin, S.,Cho, S.-N.,Brennan, P. J.,Vissa, V. American Society for Microbiology 2009 Journal of clinical microbiology Vol.47 No.6
<P>Mycobacterium leprae is the noncultivable pathogen of leprosy. Since the genome sequence of an isolate of M. leprae has become available, multiple-locus variable-number tandem-repeat (VNTR) analysis (MLVA) has been explored as a tool for strain typing and identification of chains of transmission of leprosy. In order to discover VNTRs and develop methods transferable to clinical samples, MLVA was applied to a global collection of M. leprae isolates derived from leprosy patients and propagated in armadillo hosts. PCR amplification, agarose gel electrophoresis, and sequencing methods were applied to DNA extracts from these infected armadillo tissues (n = 21). We identified polymorphisms in 15 out of 25 short-tandem-repeat (STR) loci previously selected by in silico analyses of the M. leprae genome. We then developed multiplex PCR for amplification of these 15 loci in four separate PCRs suitable for fluorescent fragment length analysis and demonstrated STR profiles highly concordant with those from the sequencing methods. Subsequently, we extended this method to DNA extracts from human clinical specimens, such as skin biopsy specimens (n = 30). With these techniques, mapping of multiple loci and differentiation of genotypes have been possible using total DNA extracts from limited amounts of clinical samples at a reduced cost and with less time. These practical methods are therefore available and applicable to answer focused epidemiological questions and to allow monitoring of the transmission of M. leprae in different countries where leprosy is endemic.</P>
Transient Analysis of HVDC System Using Forced Commutation Converter in Fault
N.Kimura,K.Taniguchi,T.Funaki,S.Fukui,K.Matsuura,K.Takenaka 전력전자학회 1995 ICPE(ISPE)논문집 Vol.1995 No.10
This paper shows the computer simulation results of transient phenomena of the HVdc system, which uses forced commutation converter, when a fault occurs in it. Simulated faults are 3 line-to-ground (3LG) ac fault and dc line-to-line fault. The results of computer simulation of ac fault show that the large fault current flows through the switching devices, that is GTO's and diodes. The results of computer simulation of dc fault show that the fault current flowing through the diode is much larger than the GTO.
Tuning of magnetic and transport properties in Bi2Te3by divalent Fe doping
Jo, N. H.,Lee, K. J.,Kim, C. M.,Okamoto, K.,Kimura, A.,Miyamoto, K.,Okuda, T.,Kim, Y. K.,Lee, Z.,Onimaru, T.,Takabatake, T.,Jung, M. H. American Physical Society 2013 Physical review. B, Condensed matter and materials Vol.87 No.20
Hiroyuki Kimura,K Kohn,K Kakurai,K Kaneko,N Metoki,S Wakimoto,Y Kamada,Y Noda 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.2I
A microscopic magnetic phase diagram as functions of temperature and magnetic .eld was mapped for multiferroic compounds of RMn2O5 (R = Er, Ho) by using neutron diraction mea- surements under high magnetic .eld. The unambiguous relation between the ferroelectric phase transition and the magnetic phase transition from a two-dimensional incommensurate to a com- mensurate phase, where both the transitions are concomitantly induced by the magnetic .eld, indicates that the electric polarization is magnetically induced and the commensurate spin state is important for stabilizing the ferroelectricity in the multiferroic RMn2O5 system. The origin of the .eld-induced magnetic phase transition is discussed based on the magnetic structure. j_si
Lattice Modulation in YMn2O5 and TbMn2O5 Studied by Using Synchrotron Radiation X-rays
Yukio Noda,H Kimura,H Sawa,K Kohn,N Ikeda,S Kobayashi,Y Ishikawa,Y Kamada,Y Wakabayashi 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.2I
RMn2O5 (R = Y and rare earth) shows successive magnetic and ferroelectric phase transitions at about 45 K, 40 K, 39 K, 20 K and 10 K and is called a multiferroic compound. We have investigated the lattice modulation vectors (qL) of YMn2O5 and TbMn2O5 by using single crystal Synchrotron Radiation X-ray diraction and compared them with the magnetic propagation vectors (qM) studied by neutron diraction. The relation of the propagation vectors between magnetic materials and dielectrics is found to be qL = 2qM. A preliminary structure analysis of the atomic displacement pattern in the commensurate ferroelectric phase of TbMn2O5 is discussed.fb