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Kwon, Il,Lee, Kyu Nam,Lee, Jung Kee,Pan, Jae Gu,Oh, Tae Kwang,Lee, Hyung Hoan,Yoon, Ki Hong 한국미생물 · 생명공학회 1995 Journal of microbiology and biotechnology Vol.5 No.4
A Brevibacterium flavum gene coding for glucose permease of the phosphoenolpyruvate-dependent phosphotransferase system (PTS) was cloned by complementing the Escherichia coli ZSC113 mutations affecting a ptsG gene with the B. flavum genomic library. From the E. coli clone grown as red colony on a MacConkey plate supplemented with glucose as an additional carbon source, a recombinant plasmid was isolated and named pBFT93. The plasmid pBFT93 was identified as carrying a 3.6-kb fragment of B. flavum chromosomal DNA which enables the E. coli transformant to use glucose or mannose as a sole carbon source in an M9 minimal medium. The non-metabolizable sugar analogues, 2-deoxy-D-glucose (2-DG) and methyl-α-D-glucopyranoside (MeGlc) affected the growth of ZSC113 cells carrying the plasmid pBFT93 on minimal medium supplemented with non-PTS carbohydrate, glycerol, as a sole cabon source, while the analogues did not repress the growth of ZSC113 cells without pBFT93. It was also found that both 2-deoxyD-[U^-14C]glucose and methyl-αa-D-[U^-14C]glucopyranoside could be effectively transported into ZSC113 cells transformed with plasmid pBFT93. Several in vivo complementation studies suggested that the B. flavum DNA in pBFT93 encodes a glucose permease specific for glucose and mannose.
Light extraction enhancement of GaN based light emitting diodes by ZnO nanorod arrays.
Choi, Pan-Ju,Kim, Ja-Yeon,Kang, Young-Jin,Kwon, Min-Ki American Scientific Publishers 2014 Journal of Nanoscience and Nanotechnology Vol.14 No.8
<P>This study examined the effects of the alignment of ZnO nanorod arrays (NRAs) on the light extraction enhancement of GaN-based light emitting diodes (LEDs), where ZnO NRAs were synthesized hydrothermally. The shape of the ZnO NRAs was controlled using seed layers for flower and vertical structures. Numerical analysis based on the two-dimensional (2D) finite difference of time domain (FDTD) method showed that the extraction efficiency of LED with bare (without ZnO NRA), vertical ZnO NRA and flower shaped ZnO NRA was 37%, 60% and 49%, respectively. The optical output power of the LEDs with vertical ZnO NRA and flower ZnO NRA was improved by 50% and 30% compared to that of the LED without ZnO NRA at an input current of 100 mA. These results suggest that the vertical alignment of ZnO NRA is important for enhancing the light extraction of GaN based LEDs.</P>
정기성,권판근 경상대학교 경남문화연구소 1978 慶南文化硏究 Vol.1 No.1
The results of Gyeongsang-Namdo in the national athletic game remain in the ninth rank despite holding the fifth rank in the national population pyramid. Some causes of inactivity in the sports of Gyeongsang-Namdo are correctly analyzed in this essay, so I want to give an aid to the establishment of sports policy in Gyeongsang-Namdo.
유색감자 자영과 홍영을 이용한 제면 특성 및 항산화 활성
홍윤기 ( Yoon Ki Hong ),정화빈 ( Hwabin Jung ),김상민 ( Sang Min Kim ),판철호 ( Cheol Ho Pan ),남정환 ( Jung Hwan Nam ),조지홍 ( Ji Hong Cho ),권오근 ( Oh Keun Kwon ),정진철 ( Jin Cheol Jeong ),이재권 ( Jae Kwon Lee ),윤원병 ( Won 충북대학교 과학교육연구소 2014 과학교육연구논총 Vol.29 No.1
The experiment was conducted to change physical properties and antioxidant activity of flour noodle and boiled flour dough that added coloured potato (Hongyoung and Jayoung) powder(RF and PF) and starch(RSF and PSF). when coloured potato was added to dough, the flavor and texture of its noodle are better than noodle made by wheat flour (WF). The hardness, gumminess and chewiness of dough added coloured potato flour showed higher value than wheat flour dough. The total phenolic compound of dough added coloured potato flour was 3.7-5.8 times higher than boiled wheat flour dough. Additionally, DPPH scavenging acvitity was 1.5-1.6 times higher than boiled weat flour dough. It indicate that manufacturing noodle with coloured potato flour present better quality than wheat flour that was generally used for manufacturing noodle.
Proteomic analysis of the sterol-mediated signaling pathway in Caenorhabditis elegans.
Choi, Byung-Kwon,Shin, Yun-Kyung,Lee, Eun-Young,Jeong, Pan-Young,Shim, Yhong-Hee,Chitwood, David J,Paik, Young-Ki Humana Press 2009 Methods in molecular biology Vol.462 No.-
<P>Since Caenorhabditis elegans is incapable of de novo cholesterol biosynthesis, it must utilize other nonpermissive sterols that are present in the environment by converting them into cholesterol for cellular function. The inhibition of sterol conversion to cholesterol in C. elegans by various sterol biosynthesis inhibitors (SBIs) is known to cause serious defects in the development of these worms. To determine the biochemical consequences of these physiological abnormalities, one can perform a proteomic analysis of worms of a certain stage that are grown in the presence of SBIs in order for the differential expression of proteins involved in the sterol-mediated signaling pathway to be identified. For example, reductions in the expression of lipoprotein family members, such as vitellogenin-2 and vitellogenin-6, are prominent in azacoprostane-treated worms. This phenomenon is also seen in worms treated with AY-9944, which blocks the conversion of 7-dehydrocholesterol, a major sterol present in C. elegans, to cholesterol.</P>
Fungal proliferation and calcium accumulation in the orange slime of Cornus controversa
Park, Junhyung,Kwon, Jun Hyeong,Kim, Hae Rang,Kwon, Ohkyung,Koh, Sang-Hyun,Kim, Pan-Gi,Bae, Kwan Ho,Kim, Dong Geun,Kwon, Oh Kyu,Joo, Sung Hyun,Jung, Sung-Gwan,Kim, Ki Woo Sage Publishing 2017 Forest Science And Technology Vol.13 No.4
Jeon, Jong-Hyun,Choi, Pan-Ju,Oh, Seung Jong,Kang, Young-Jin,Kim, Ja-Yeon,Kwon, Min-Ki American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.7
<P>Herein, we report the effects of geometric morphology of ZnO nanostructures on the extraction efficiency of GaN-based light emitting diodes (LEDs). We performed numerical analysis based on the two-dimensional (2D) finite difference of time domain (FDTD) method that was utilized to calculate the light extraction efficiency of the LEDs. We found that the extraction efficiency of the LED increased upon changing the shape of ZnO nanostructure from nanorods to pencil-likenanorods. The current-voltage characteristics of the LED with ZnO nanorods or pencil-like nanorods were similar to those of the LED that did not contain any ZnO nanostructures. The light output power of the LEDs containing ZnO nanorods or pencil-like nanorods at 100 mA increased additionally to 28% and 39%, respectively, relative to that of the LED that did not contain any ZnO nanostructures. These results confirm that the geometric morphology of the ZnO nanostructure plays an important role in improving the extraction efficiency of the LEDs.</P>
Effect of Chlorination on Removal of Cyanobacterial Microcystins
Jung, Jong-Mun,Park, Hong-Ki,Lee, You-Jung,Jung, Eun-Young,Kwon, Ki-Won,Shin, Pan-Se,Joo, Gea-Jae 한국환경과학회 2002 한국환경과학회지 Vol.11 No.11
The effective removal of microcystins by chlorination was investigated on a laboratory scale. With an initial chl.a concentration of more than 1,000 ㎍/ℓ, the required chlorine dose for the effective removal of microcystins from the raw water was more than 8.0 ㎎/ℓ. Whereas, a chlorine does of 3.0 ㎎/ℓ could effectively remove microcystins from raw water containing a chl.a concentration of less than 1,000 ㎍/ℓ. The microcystin removal was more effective below pH 8.0, plus the optimum pH range was unrelated to the concentration of toxic algal material. Although chlorination is one of the most effective methods for reducing the toxin from blue-green algae, it causes cell lysis and toxin release. However, it was demonstrated that the released cell lysates and toxins could be effectively removed by a higher dose of the oxidant. The highest removal efficiency of dissolved microcystins(initial concentration: 280 ㎍ L^-1) was with a chlorine dose of 5.0 ㎎/ℓ.