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Ribosomal DNA의 ITS영역 염기서열 분석에 의한 기주특이적 독소 생성 Alternaria spp.의 계통분류학적 유연관계
高昇柱,洪承範,姜熙玩,劉勝憲,柳震彰 충남대학교 생물공학연구소 1998 생물공학연구지 Vol.6 No.-
기주특이적 독소 생성 Alternaria spp.와 비병원성 A. alternata의 계통분류학적 유연관계를 규명하기 위하여 기주특이적 독소 생성 Alternaria 6균, 비병원성인 A. alternata 그리고 비교균으로서 소형포자를 형성하는 A. brassicicola, 대형포자를 형성하는 A. solani의 ribosmal DNA의 5.8S를 포함한 ITS영역의 염기 서열을 분석하였던 바 다음과 같은 결과를 얻었다. 1. Alternaria spp.의 rDNA ITS영역의 염기서열 크기는 548∼562bp였으며 5.8S rDNA에서는 비교종간에 서로 일치하였고 ITS I에서는 종간 뚜렷한 차이를 보였다. 2. 기주특이적 독소 생성 Alternaria spp.의 rDNA의 ITS영역의 염기서열은 비병원성인 A. alternata의 염기서열과는 서로 일치하였으나 A. brassicicola와는 3%, A. solani와는 7%의 염기서열 차를 보였다. 3. 기주특이적 독소 생성 Alternaria spp.는 비병원성 A. alternata와 진화적으로 매우 가까운 유연관계를 나타내었다. The regions of internal transcribed spacer(ITS) including 5.8S ribosomal DNA(rDXA) from six host-specific toxin(HST) producing Alternaria spp. nonpathogenic A. alternata. A. solani and A. brassicicola were sequenced to assess their relationship in taxonomy. There was no difference in the sequences of ITS including 5.8S rDNA among the HST-producing Alternaria spp. and nonpathogenic A. alternata. However, the sequences of HST-producing Alternaria spp. were different from those of A. solani and A. brassicicola by about 7% and 3%, respectively. These results suggest that HST-producing Alternaria spp. are evolutionarily very close to non pathogenic A. alternata although they have host-specific pathogenecity.
Kim, Joo Sung,Baek, Seung Ki,Kim, Young Been,Do, Hyun Woo,Kwon, Yong Hun,Cho, Sung Woon,Yun, Young Dae,Yoon, Jae Hong,Lee, Han-Bo-Ram,Kim, Sang-Woo,Cho, Hyung Koun Elsevier 2018 Nano energy Vol.46 No.-
<P><B>Abstract</B></P> <P>Conventional <I>p-</I>CuInSe<SUB>2</SUB> absorbers for solar cells have been homogenously synthesized using multi-step process despite a narrow crystal phase region in the phase diagram and the existence of various secondary phases. In contrast, here we propose artificially-designed heterophasic blended copper indium selenide compounds for water splitting photoanodes using a simple one-step annealing synthetic process where the electrodeposited metal precursors were directly annealed with Se vapor injection and without additional intermediate steps. The resultant product is revealed to possess a novel “<I>phase-blended structure</I>” comprising two phases of <I>p-</I>type CuInSe<SUB>2</SUB> and <I>n-</I>type CuIn<SUB>3</SUB>Se<SUB>5</SUB> crystals. The CuInSe<SUB>2</SUB> nanoparticles with a higher Cu fraction are three-dimensionally (3D) embedded in the <I>n-</I>type CuIn<SUB>3</SUB>Se<SUB>5</SUB> matrix, which has been verified by various analysis methods such as X-ray diffraction, transmission electron microscopy, and capacitance-voltage curve. The average diameter of the CuInSe<SUB>2</SUB> nanoparticles is 66.8nm and the interval between the nanoparticles in the CuIn<SUB>3</SUB>Se<SUB>5</SUB> matrix is 67.6nm. Consequently, the phase-blended structure photoabsorber exhibits a remarkably enhanced anodic photocurrent of 12.7mA/cm<SUP>2</SUP> at 1.23V versus the reversible hydrogen electrode. The considerably enhanced photocurrent gain of the phase-blended structure photoanode is attributed to the excellent charge separation facilitated by the built-in potential generated from the 3D <I>p-n</I> junction.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Inorganic heterophasic blended structure was synthesized via one-step annealing process of electrodeposited Cu/In bilayers. </LI> <LI> We designed inorganic heterophasic blended structure consisting of <I>p</I>-type CuInSe<SUB>2</SUB> nanoparticles and <I>n</I>-type CuIn<SUB>3</SUB>Se<SUB>5</SUB> matrix. </LI> <LI> The nanoscale CuInSe<SUB>2</SUB> nanoparticles with a higher Cu fraction were three-dimensionally embedded in <I>n</I>-type CuIn<SUB>3</SUB>Se<SUB>5</SUB> matrix. </LI> <LI> Phase-blended structure resulted in sufficient depletion and efficiently separated photo-generated electron-hole pairs. </LI> <LI> Phase-blended structure CIS showed remarkably enhanced photocurrent and good stability with an ultra-thin Al<SUB>2</SUB>O<SUB>3</SUB> layer. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>We report an inorganic heterophasic blended structure with remarkably enhanced photocurrent performance via built-in potential between <I>p</I>-type CuInSe<SUB>2</SUB> nanoparticles and <I>n</I>-type CuIn<SUB>3</SUB>Se<SUB>5</SUB> matrix.</P> <P>[DISPLAY OMISSION]</P>
First report of cross-species transmission of deer hepatitis E virus to a guanaco in Korea
Byung-Joo Park,Ji-Hyung Yi,Hee-Seop Ahn,Sang-Hoon Han,Yong-Hyun Kim,Hyeon-Jeong Go,Dong-Hwi Kim,Joong-Bok Lee,Seung-Yong Park,Chang-Seon Song,Sang-Won Lee,In-Soo Choi 한국예방수의학회 2017 예방수의학회지 Vol.41 No.3
The hepatitis E virus (HEV) is a leading causative agent of acute hepatitis in humans. Zoonotic HEV strains have been isolated from several animal species, including pigs. New HEV variants have been recently isolated from camels in the Middle East. In the present study, fecal samples from fallow deer, formosan deer, alpaca, and guanaco were analyzed for the detection of HEV. One HEV strain was detected from guanaco, a species of camelids. The nucleotide sequence of guanaco HEV was identical to those of deer HEV-3 strains, which implied the cross-species transmission of HEV-3 from deer to guanaco.
Hong, Seung-Beom,Jee, Hyeong-Jin,Lee, Seung-Im,Go, Seung-Joo The Korean Society of Plant Pathology 1999 Plant Pathology Journal Vol.15 No.4
Genetic diversity of ninety-five Korean isolates of Phytophthora was investigated on the basis of PCR-RFLP of ribosomal DNA. The isolates were previously identified as following fifteen species by mycological and cultural characteristics; P. boehmeriae, P. cactorum, P. cambivora, P. capsici, P. cinnamoni, P. citricola, P. citrophthora, P. cryptogea, P. drechsleri, P. erythroseptica, P. infestans, P. megasperma, P. nicotianae, P. palmivora and P. sojae. The regions of small subunit (SSU) and internal transcribed spacer (ITS) of rDNA were amplified with primer pair, NS1 and ITS4, by polymerase chain reaction (PCR) and digested with nine restriction enzymes. P. boehmeriae, P. cactorum, P. cambivora, P. capsici, P. cinnamomi, P. citricola, P. citrphthora, P. infestans, P. nicotianae and P. palmivora showed specific band patterns for each species. However, P. sojae and P. erythroseptica presented identical band patterns and P. cryptogea, P. drechsleri and P. megasperma were divided into six groups, which were not compatible with delineation of the species. A group originated from cucurbits showed distinct band patterns from other groups, but the other five groups were closely related within 96.0% similarity, forming one complex group. Consequently, Korean isolates of Phytophthora were divided into thirteen genetic groups and each group was readily differentiated by comparing digestion patterns of AvaII, HaeIII, MboI, HhaI and MspI. Therefore, PCR-RFLP of rDNA using the five enzymes can be used to differentiate or identify the Phytophthora species reported in Korea so far.
Hwang, Joo-Yeon,Lee, Seung Hun,Kim, Ghi-Su,Koh, Jung-Min,Go, Min-Jin,Kim, Tae-Ho,Hong, Jung-Min,Park, Eui-Kyun,Kim, Shin-Yoon,Lee, Jong-Young Korea Genome Organization 2009 Genomics & informatics Vol.7 No.1
Osteoporosis is characterized by impaired osteogenesis. BMD is a major determinant of bone strength. The role of the VDR gene in predisposition to primary osteoporosis has been recognized. However, population-based case-control studies have been reported controversial results for known candidate genes in an ethnically distinct group. To determine the genetic effects of VDR variants on osteoporosis and BMD, we directly sequenced the VDR gene in 24 unrelated Korean individuals and identified eighteen sequence variants. We investigated the potential involvement of eight SNPs in osteoporosis in postmenopausal women (n = 729). Two SNPs (LD) in intron 2, -5294G>C (rs2238135) and -4817G>A (rs17882443) showed the evidence of association with enhanced BMD of the femoral neck ($p_{additive}$=0.031 for rs2238135; $p_{additive}$=0.017 and $p_{dominant}$= 0.019 for 17882443). Moreover, VDR -4817G>A was significantly associated with protective effect on all fracture risk ($p_{recessive}$=0.035, OR=0.2, 95% CI=$0.05{\sim}0.89$), and tended to be higher BMD values at various proximal femur sites. Therefore, we suggest that the -4817G>A may be useful genetic marker for vitamin D-related metabolism and may have an important role in the increased BMD of the proximal femur in postmenopausal Korean women.