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Jung, Min Wook,Myung, Sung,Song, Wooseok,Kang, Min-A,Kim, Sung Ho,Yang, Cheol-Soo,Lee, Sun Sook,Lim, Jongsun,Park, Chong-Yun,Lee, Jeong-O,An, Ki-Seok American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.16
<P>We have fabricated graphene-based chemical sensors with flexible heaters for the highly sensitive detection of specific gases. We believe that increasing the temperature of the graphene surface significantly enhanced the electrical signal change of the graphene-based channel, and reduced the recovery time needed to obtain a normal state of equilibrium. In addition, a simple and efficient soft lithographic patterning process was developed via surface energy modification for advanced, graphene-based flexible devices, such as gas sensors. As a proof of concept, we demonstrated the high sensitivity of NO<SUB>2</SUB> gas sensors based on graphene nanosheets. These devices were fabricated using a simple soft-lithographic patterning method, where flexible graphene heaters adjacent to the channel of sensing graphene were utilized to control graphene temperature.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-16/am502281t/production/images/medium/am-2014-02281t_0006.gif'></P>
FTFD: an informatics pipeline supporting phylogenomic analysis of fungal transcription factors.
Park, Jongsun,Park, Jaejin,Jang, Suwang,Kim, Seryun,Kong, Sunghyung,Choi, Jaeyoung,Ahn, Kyohun,Kim, Juhyeon,Lee, Seungmin,Kim, Sunggon,Park, Bongsoo,Jung, Kyongyong,Kim, Soonok,Kang, Seogchan,Lee, Yon Oxford University Press 2008 Bioinformatics Vol.24 No.7
<P>Genomes of more than 60 fungal species have been sequenced to date, yet there has been no systematic approach to analyze fungal transcription factors (TFs) kingdom widely. We developed a standardized pipeline for annotating TFs in fungal genomes. Resulting data have been archived in a new database termed the Fungal Transcription Factor Database (FTFD). In FTFD, 31,832 putative fungal TFs, identified from 62 fungal and 3 Oomycete species, were classified into 61 families and phylogenetically analyzed. The FTFD will serve as a community resource supporting comparative analyses of the distribution and domain structure of TFs within and across species.</P>
랫드에서 사염화탄소로 유발된 간손상에 대한 간조직 추출물 항독성 분획의 개선효과
김종선(Jongsun Kim),장자영(Ja Young Jang),신선희(Sunhee Shin),박동선(Dongsun Park),김은주(Eun Ju Kim),조정희(Jung-Hee Cho),황석연(Seock-Yeon Hwang),권철(Chull Kwon),권지현(Ji Hyun Kwon),황규계(Kyu-Kye Kwang),김윤배(Yun-Bae Kim) 한국실험동물학회 2004 Laboratory Animal Research Vol.20 No.3
The detoxification effect of Liver Extract Antitoxic Fractions (LEAFs) on liver injury and dysfunction induced by carbon tetrachloride (CCl₄) was investigated. Female rats were injected intraperitoneally with CCl₄ at a dose of 1 ㎖/㎏ (20% in corn oil, 5 ㎖/㎏). LEAF-B or LEAF-P, originated from bovine and porcine, respectively, was treated subcutaneously at doses of 100, 300 or 500 ㎎/㎏ (10 ㎖/㎏) 4 hr and 30 min prior to as well as 4 hr and 20 hr after CCl₄ challenge. The rats were anesthesized with intraperitoneal injection of urethane (16.5% in saline, 6 ㎖/㎏) 4 hr following final LEAF treatment (24 hr after CCl₄ injection), and administered with bromosulphalein (BSP) solution (1% in saline, 2 ㎖/㎏). The initial biliary excretion time of BSP was recorded, and the blood concentration of BSP was quantified 21 and 46 min after intravenous administration. Also, blood biochemical parameters related to hepatic and renal injuries in accordance with histopathological findings were analyzed. The biliary excretion time of BSP was greatly delayed by CCl₄ injection, which was significantly attenuated by 300-500 ㎎/㎏ of LEAF-B and 100 or 500 ㎎/㎏ of LEAF-P. Also, CCl₄-induced delay in BSP clearance was markedly recovered by 300-500 ㎎/㎏ of LEAF-B or 500 ㎎/㎏ of LEAF-P. In addition, CCl₄-induced changes in blood biochemical markers related to hepatic and renal injuries were remarkably reversed by LEAF-B or LEAF-P in a dose-dependent manner. Such effects of LEAFs on liver dysfunction were in parallel with the histopathological findings of the liver. That is, CCl₄ caused centrilobular congestion, hepatocytic degeneration, lipid droplets and immflamatory cell infiltration, resulting in disintegration of hepatic cords. Interestingly, such lesions were attenuated by LEAFs treatment, reducing mean lesion scores from 2.30 in rats administered with CCl₄ alone to 1.75 and 1.65 in animals treated with 500 ㎎/㎏ of LEAF-B and LEAF-P, respectively. Taken together, it is suggested that LEAFs might have protective effects against hepatic and renal cytotoxicity and dysfunction including impairments of hepatic biosynthesis, biliary excretion, metabolism and filtration induced by CCl₄, and that the effecacy of LEAF-P is comparable to that of LEAF-B which is avaliable in clinics.
Nak Jung Choi,Hyun-Ju Kim,Bong-Choon Lee,Sang-Min Kim,Shin-Hwa Kim,Jongsun Park 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
Nilaparvata lugens, brown planthoppers, is one of important pests on rice. Korean N. lugens is migrated from China and causing severe damages on rice in early September in Korea. For identifying biotypes of these N. lugens based on complete mitochondrial genomes, we completed mitochondrial genome of N. lugens captured in Hadong-gun, Gyoungsang-nam province in Korea. The circular mitogenome of N. lugens is 17,610 bp including 13 protein-coding genes, two ribosomal RNA genes, 22 transfer RNAs, and a single large non-coding region of 2,424 bp. The base composition was AT-biased (89.5%). 112 single nucleotide polymorphisms (SNPs) and 59 insertions and deletions are identified by comparing with Chinese N. lugens. Based on phylogenetic trees together with those of N. lugens captured in China, no clear phylogenetic relationship along with five biotypes, requiring more researches to achieve biotype identification including detailed analysis of sequence variations on mitochondrial genomes and whole genome analysis of N. lugens in near future.