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Park, Gyeong-Su,Lee, Eun Kyung,Lee, Jun Ho,Park, Juyeon,Kim, Seong Keun,Li, Xiang Shu,Park, Ju Cheol,Chung, Jae Gwan,Jeon, Woo Sung,Heo, Sung,Lee, Jae Hak,Choi, Byoung Lyong,Kim, Jong Min American Chemical Society 2009 NANO LETTERS Vol.9 No.5
<P>Methods of producing Si nanodots embedded in films of silicon oxide and silicon nitride abound, but fabrication of Si nanodots in a nanowire of these materials is very rare despite the fact that nanowire architecture enhances the charge collection and transport efficiencies for solar cells and field-effect transistors. We report a novel fabrication method for a high-density array of size-controlled sillicon nanodots from a silicon oxide nanowire using electron-beam irradiation. Our results demonstrate that a highly dense phase of Si nanodots with a narrow size distribution can be made from a silicon oxide nanowire with a core-shell structure of crystalline silicon-rich oxide (c-SRO)/amorphous silicon oxide (a-SiO(2)). This new nanomaterial shows the carrier transport characteristics of a semiconductor. The initially produced amorphous Si nanodots can be readily turned into crystalline Si (c-Si) nanodots by thermal annealing. Key characteristics of c-Si nanodots such as their size, number density, and rate of nucleation and growth are easily controlled by varying the electron radiation dose and annealing temperature. Nanodot formation is mechanistically initiated by electron trapping at the c-SRO core as well as at the core-shell interface, which leads to out-diffusion of the negatively charged oxygen through Coulomb repulsion, fostering the aggregation of Si atoms.</P>
포스터 발표 : 포스터 연제 ; 혈액투석으로 전환하여 성공적으로 치료한 복막투석치료중인 당뇨병성 만성신부전환자에서 발생한 고삼투압성 혼수
고경식 ( Go Gyeong Sig ),이은규 ( Lee Eun Gyu ),박경창 ( Park Gyeong Chang ),박규용 ( Park Gyu Yong ),구자룡 ( Gu Ja Lyong ),김근호 ( Kim Geun Ho ),전로원 ( Jeon Lo Won ),김형직 ( Kim Hyeong Jig ),채동완 ( Chae Dong Wan ),노정우 ( 대한신장학회 1999 춘계학술대회 초록집 Vol.18 No.2
포스터 발표 : 포스터 연제 ; 준임상성(subclinical) 전신성홍반성낭창 임신부 신증후군환자에서 확인된 IgA 신병증 1예
박경창 ( Park Gyeong Chang ),이은규 ( Lee Eun Gyu ),박규용 ( Park Gyu Yong ),구자룡 ( Gu Ja Lyong ),김근호 ( Kim Geun Ho ),전로원 ( Jeon Lo Won ),김형직 ( Kim Hyeong Jig ),채동완 ( Chae Dong Wan ),노정우 ( No Jeong U ),남은숙 ( Na 대한신장학회 1999 춘계학술대회 초록집 Vol.18 No.2
Isolation and Characterization of b-Carotene Hydroxylase Gene in Rape (Brassica napus)
오현정,고영환,Gyeong Lyong Jeon,Kyoung Ha So,송관정,Se Yong Lee 한국원예학회 2006 Horticulture, Environment, and Biotechnology Vol.47 No.4
b-Carotene hydroxylase (b-CHX) is a key enzyme of the carotenoid biosynthetic pathway and catalyzes the hydroxylation of b-carotene's b-ring to produce xanthophylls, b-cryptoxanthin, zeaxanthin, violaxanthin, and neoxanthin. In this study, we have isolated and characterized a full-length cDNA clone encoding b-CHX from rape (Brassica napus cv. Halla). The cDNA clone showed high sequence homology with b-CHX genes from various plant species and encoded 304 amino acids with a predicted molecular weight of 33 kDa. The expression of b-CHX gene was examined by Northern blot analysis in different tissues. The transcript for b-CHX was detected in leaves, petals, and flower buds, showing the highest expression level in flower buds. The result of HPLC analysis revealed that petals and flower buds contained high levels of hydroxylated carotenoid forms such as violoxanthin and neoxanthin. These results suggest that the high expression of b-CHX gene in flowers and flower buds might be closely related with change of carotenoid composition in these tissues.
Isolation and Characterization of β-Carotene Hydroxylase Gene in Rape (Brassica napus)
Hyun Jeong Oh,Gyeong Lyong Jeon,Kyoung Ha So,Kwan Jeong Song,Young Hwan Ko,Se Yong Lee 한국원예학회 2006 Horticulture, Environment, and Biotechnology Vol.47 No.4
β-Carotene hydroxylase (β-CHX) is a key enzyme of the carotenoid biosynthetic pathway and catalyzes the hydroxylation of β-carotene's β-ring to produce xanthophylls, β-cryptoxanthin, zeaxanthin, violaxanthin, and neoxanthin. In this study, we have isolated and characterized a full-length cDNA clone encoding β-CHX from rape (Brassica napus cv. Halla). The cDNA clone showed high sequence homology with β-CHX genes from various plant species and encoded 304 amino acids with a predicted molecular weight of 33 kDa. The expression of β-CHX gene was examined by Northern blot analysis in different tissues. The transcript for β-CHX was detected in leaves, petals, and flower buds, showing the highest expression level in flower buds. The result of HPLC analysis revealed that petals and flower buds contained high levels of hydroxylated carotenoid forms such as violoxanthin and neoxanthin. These results suggest that the high expression of β-CHX gene in flowers and flower buds might be closely related with change of carotenoid composition in these tissues.
만성 특발성 췌장염 환자에서 Cationic Trypsinogen 유전자 변이
이우진 ( Lee U Jin ),김경아 ( Kim Gyeong A ),이준성 ( Lee Jun Seong ),전영빈 ( Jeon Yeong Bin ),정지봉 ( Jeong Ji Bong ),류지곤 ( Lyu Ji Gon ),김용태 ( Kim Yong Tae ),윤용범 ( Yun Yong Beom ),김정룡 ( Kim Jeong Lyong ) 대한소화기학회 2004 대한소화기학회지 Vol.43 No.1
Background/Aims: Mutation of Cationic trypsinogen gene is clearly associated with hereditary pancreatitis and plays an important role in the pathogenesis of pancreatitis. According to literature, this mutation is occasionally occurred in patients with pancreatitis in Western countries and Japan. The aim of this study was to find out whether the mutation was observed in Korean patients with chronic idiopathic pancreatitis. Methods: Peripheral blood samples of 11 patients with chronic idiopathic pancreatitis were collected consecutively, and DNA was extracted from the samples. Polymerase chain reaction was performed in exon 2 and 3 of cationic trypsinogen gene. Then, DNA products were purified and sequenced. Results: The mutation was not found in exon 2 and 3 of cationic trypsinogen gene in these patients. Conclusions: There was no cationic trypsinogen mutation in Korean patients with chronic idiopathic pancreatitis. Further large sampled cohort study is needed. (Korean J Gastroenterol 2004;43:41-46)