RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      • 좁혀본 항목

      • 좁혀본 항목 보기순서

        • 원문유무
        • 음성지원유무
          • 원문제공처
          • 등재정보
          • 학술지명
          • 주제분류
          • 발행연도
          • 작성언어
          • 저자

        오늘 본 자료

        • 오늘 본 자료가 없습니다.
        더보기
        • 무료
        • 기관 내 무료
        • 유료
        • KCI등재

          Fuzzy Ideals Extensions in Semigroups

          XIANG,YUN,XIE 경북대학교 자연과학대학 수학과 2002 Kyungpook mathematical journal Vol.42 No.1

          In this paper, we shall introduce the notions of fuzzy ideal extension property, strongly fuzzy extension property and fuzzy property of a semigroup S. We also discuss the relations of these fuzzy ideal extension poperties and some properties of semigroups with the fuzzy ideal extension prorerty. Furthermore, we prove that a semigroup has the ideal extension property if and only if S has the strongly fuzzy ideal extension property. As an application of the results of this paper, we obtain characterizations of cyclic semigroups

        • KCI등재SCOPUS

          Regulation of Metabolic Flux in Lactobacillus casei for Lactic Acid Production by Overexpressed LdhL Gene with Two-Stage Oxygen Supply Strategy

          ( Xiang Yang Ge ), ( Yan Xu ), ( Xiang Chen ), ( Long Yun Zhang ) 한국미생물 · 생명공학회 2015 Journal of microbiology and biotechnology Vol.25 No.1

          This study describes a novel strategy to regulate the metabolic flux for lactic acid production in Lactobacillus casei. The ldhL gene encoding L-lactate dehydrogenase (L-LDH) was overexpressed in L. casei, and a two-stage oxygen supply strategy (TOS) that maintained a medium oxygen supply level during the early fermentation phase, and a low oxygen supply level in the later phase was carried out. As a consequence, a maximum L-LDH activity of 95.6 U/ml was obtained in the recombinant strain, which was over 4-fold higher than that of the initial strain. Under the TOS for L. casei (pMG-ldhL), the maximum lactic acid concentration of 159.6 g/l was obtained in 36 h, corresponding to a 62.8% increase. The results presented here provide a novel way to regulate the metabolic flux of L. casei for lactic acid production in different fermentation stages, which is available to enhance organic acid production in other strains.

        • KCI등재SCOPUS

          Plant Regeneration of Turf-Type Common Bermudagrass (Cynodon dactylon) via Somatic Embryogenesis from Seed-Derived Callus

          Yun,Xiang,Zang,Seung,Beom,Hong,Dhandapani,Murugesan,Jong,Gu,Lim,Doo,Hwan,Kim 한국원예학회 2006 Horticulture, Environment, and Biotechnology Vol.47 No.4

          Two common bermudagrass (Cynodon dactylon L. Pers.) cultivars, ‘Sundevil Ⅱ' and ‘Mirage', were used to improve tissue culture responses in embryogenesis and regeneration. Embryogenic calli were induced from the seeds of the two cultivars. Callus started forming at the base of scutellum of germinating seeds about 7 days after culturing in callus induction medium. Callus induced on MS medium with 2 ㎎ㆍL?¹ -12,4-dichlorophenoxyacetic acid only was not regenerable. However, when 0.1 to 0.5 ㎎ㆍL?¹ 6-benzylaminopurine was added to the above medium, compact and yellowish callus formed and was regenerable. The induced embryogenic callus produced shoots about 5 days after transferring to regeneration medium with regeneration rates of more than 70% for the two cultivars. All of the regenerated plants rooted within 3 days and were morphologically normal after transferring to rooting medium.

        • KCI등재SCOPUS

          Metabolic Engineering of Indole Glucosinolates in Chinese Cabbage Hairy Roots Expressing Arabidopsis CYP79B2, CYP79B3, and CYP83B1

          Yun-Xiang,Zang,Doo-Hwan,Kim,박범석,홍승범 한국생물공학회 2009 Biotechnology and Bioprocess Engineering Vol.14 No.4

          Indole glucosinolates (IG), a group of secondary metabolites found almost extensively in the order Brassicales, play an important role in the interaction between plant and insect or microorganism. In order to explore the possibility of IG metabolic engineering in Chinese cabbage hairy roots, three Arabidopsis cDNAs CYP79B2, CYP79B3, and CYP83B1 combined with rolABC were introduced into Chinese cabbage by Agrobacterium-mediated transformation. Overexpression of CYP79B2, CYP79B3, or CYP83B1 alone did not affect the accumulation levels of IG in transgenic hairy roots. However, when CYP83B1 was overexpressed together with CYP79B2 and/or CYP79B3, some of the transgenic hairy roots accumulated higher levels of glucobrassicin (GBC) or 4-methoxy glucobrassicin (4-OMeGBC) than control hairy root line carrying rolABC vector. With regard to the IG accumulation, overexpression of all three cDNAs showed no better than overexpression of both cDNAs. Both 4-OMeGBC and neoglucobrassicin (neo-GBC) were found to be the main components of IG that comprise about 90% of total IG in all types of Chinese cabbage hairy root lines. In transgenic hairy root lines rB3B1-8 and rB2B1B3-5, 4-OMeGBC increased to 2 and 1.5-fold, while neo-GBC decreased to 0.5 and 0.6-fold, respectively. This suggests that an increased production of 4-OMeGBC causes a reduction of neo-GBC level since the two types derive from a common precursor GBC. However, in terms of the total IG level, the transgenic hairy roots did not show significant differences from controls.

        • La traduction du theatre francais en Chine

          ( Yun Zhang Xiang ) 한국통역번역학회 2007 FORUM Vol.5 No.2

          This article first presents a list of French dramas which have been translated into Chinese and performed in China. By analysing the list of works, the author attempts to nail down the factors which influence both the translation and the performance of French dramas in China. In addition to the selection of dramas made by the translators or the stage directors from the cultural perspectives, there are still specific requirements for the translated works to be performed on the stage in China. This article highlights the importance for the translation works to recover the performance implicit in the text of the original works. Meanwhile, the author explores the process of drama translation by taking examples of the Chinese translation of Le Tartuffe, the famous play written by Moliere.

        • KCI등재

          Metabolic Engineering of Indole Glucosinolates in Chinese Cabbage Plants by Expression of Arabidopsis CYP79B2, CYP79B3, and CYP83B1

          Yun-Xiang,Zang,Myung-Ho,Lim,Beom-Seok,Park,홍승범,Doo,Hwan,Kim 한국분자세포생물학회 2008 Molecules and cells Vol.25 No.2

          Indole glucosinolates (IG) play important roles in plant defense, plant-insect interactions, and stress responses in plants. In an attempt to metabolically engineer the IG pathway flux in Chinese cabbage, three important Arabidopsis cDNAs, CYP79B2, CYP79B3, and CYP83B1, were introduced into Chinese cabbage by Agrobacterium-mediated transformation. Overexpression of CYP79B3 or CYP83B1 did not affect IG accumulation levels, and overexpression of CYP79B2 or CYP79B3 prevented the transformed callus from being regenerated, displaying the phenotype of indole-3-acetic acid (IAA) overproduction. However, when CYP83B1 was overexpressed together with CYP79B2 and/or CYP79B3, the transformed calli were regenerated into whole plants that accumulated higher levels of glucobrassicin, 4-hydroxy glucobrassicin, and 4-methoxy glucobrassicin than wild-type controls. This result suggests that the flux in Chinese cabbage is predominantly channeled into IAA biosynthesis so that coordinate expression of the two consecutive enzymes is needed to divert the flux into IG biosynthesis. With regard to IG accumulation, overexpression of all three cDNAs was no better than overexpression of the two cDNAs. The content of neoglucobrassicin remained unchanged in all transgenic plants. Although glucobrassicin was most directly affected by overexpression of the transgenes, elevated levels of the parent IG, glucobrassicin, were not always accompanied by increases in 4-hydroxy and 4- methoxy glucobrassicin. However, one transgenic line producing about 8-fold increased glucobrassicin also accumulated at least 2.5 fold more 4-hydroxy and 4- methoxy glucobrassicin. This implies that a large glucobrassicin pool exceeding some threshold level drives the flux into the side chain modification pathway. Aliphatic glucosinolate content was not affected in any of the transgenic plants. Indole glucosinolates (IG) play important roles in plant defense, plant-insect interactions, and stress responses in plants. In an attempt to metabolically engineer the IG pathway flux in Chinese cabbage, three important Arabidopsis cDNAs, CYP79B2, CYP79B3, and CYP83B1, were introduced into Chinese cabbage by Agrobacterium-mediated transformation. Overexpression of CYP79B3 or CYP83B1 did not affect IG accumulation levels, and overexpression of CYP79B2 or CYP79B3 prevented the transformed callus from being regenerated, displaying the phenotype of indole-3-acetic acid (IAA) overproduction. However, when CYP83B1 was overexpressed together with CYP79B2 and/or CYP79B3, the transformed calli were regenerated into whole plants that accumulated higher levels of glucobrassicin, 4-hydroxy glucobrassicin, and 4-methoxy glucobrassicin than wild-type controls. This result suggests that the flux in Chinese cabbage is predominantly channeled into IAA biosynthesis so that coordinate expression of the two consecutive enzymes is needed to divert the flux into IG biosynthesis. With regard to IG accumulation, overexpression of all three cDNAs was no better than overexpression of the two cDNAs. The content of neoglucobrassicin remained unchanged in all transgenic plants. Although glucobrassicin was most directly affected by overexpression of the transgenes, elevated levels of the parent IG, glucobrassicin, were not always accompanied by increases in 4-hydroxy and 4- methoxy glucobrassicin. However, one transgenic line producing about 8-fold increased glucobrassicin also accumulated at least 2.5 fold more 4-hydroxy and 4- methoxy glucobrassicin. This implies that a large glucobrassicin pool exceeding some threshold level drives the flux into the side chain modification pathway. Aliphatic glucosinolate content was not affected in any of the transgenic plants.

        • KCI등재SCOPUS

          Possible role of Pax-6 in promoting breast cancer cell proliferation and tumorigenesis

          ( Xiang Yun Zong ), ( Hong Jian Yang ), ( Yang Yu ), ( De Hong Zou ), ( Zhi Qiang Ling ), ( Xiang Ming He ), ( Xu Li Meng ) 생화학분자생물학회(구 한국생화학분자생물학회) 2011 BMB Reports Vol.44 No.9

          Pax 6, a member of the paired box (Pax) family, has been implicated in oncogenesis. However, its therapeutic potential has been never examined in breast cancer. To explore the role of Pax6 in breast cancer development, a lentivirus based short hairpin RNA (shRNA) delivery system was used to knockdown Pax6 expression in estrogen receptor (ER)-positive (MCF-7) and ER-negative (MDA-MB-231) breast cancer cells. Effect of Pax6 silencing on breast cancer cell proliferation and tumorigenesis was analyzed. Pax6-RNAi-lentivirus infection remarkably downregulated the expression levels of Pax6 mRNA and protein in MCF-7 and MDA-MB-231 cells. Accordingly, the cell viability, DNA synthesis, and colony formation were strongly suppressed, and the tumorigenesis in xenograft nude mice was significantly inhibited. Moreover, tumor cells were arrested at G0/G1 phase after Pax6 was knocked down. Pax6 facilitates important regulatory roles in breast cancer cell proliferation and tumor progression, and could serve as a diagnostic marker for clinical investigation. [BMB reports 2011; 44(9): 595-600]

        • KCI등재
        맨 위로 스크롤 이동