http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Han, Seokyoung,de Jong, Koen,Yi, Keewook Elsevier 2017 Journal of Asian earth sciences Vol.143 No.-
<P><B>Abstract</B></P> <P>Sensitive High-Resolution Ion Microprobe (SHRIMP) U–Th–Pb isotopic data of detrital zircons from mature, quartz-rich meta-sandstones are used to constrain possible tectonic affinities and source regions of the rhythmically layered and graded-bedded series in the Yeoncheon Complex (Imjingang Belt) and the correlative Taean Formation. These metamorphic marine turbidite sequences presently occur along the Paleoproterozoic (1.93–1.83Ga) Gyeonggi Massif, central Korea’s main high-grade metamorphic gneiss terrane. Yet, detrital zircons yielded highly similar multimodal age spectra with peaks that do not match the age repartition in these basement rocks, as late (1.9–1.8Ga) and earliest (∼2.5Ga) Paleoproterozoic detrital modes are subordinate but, in contrast, Paleozoic (440–425Ma) and Neoproterozoic (980–920Ma) spikes are prominent, yet the basement essentially lacks lithologies with such ages. The youngest concordant zircon ages in each sample are: 378, 394 and 423Ma. The maturity of the meta-sandstones and the general roundness of zircons of magmatic signature, irrespective of their age, suggest that sediments underwent considerable transport from source to sink, and possibly important weathering and recycling, which may have filtered out irradiation-weakened metamorphic zircon grains. In combination with these isotopic data, presence of a low-angle ductile fault contact between the Yeoncheon Complex and the Taean Formation and the underlying mylonitized Precambrian basement implies that they are in tectonic contact and do not have a stratigraphic relationship, as often assumed. Consequently, in all likelihood, both meta-sedimentary formations: (1) are at least of early Late Devonian age, (2) received much of their detritus from distant (reworked) Silurian–Devonian and Early Neoproterozoic magmatic sources, not present in the Gyeonggi Massif, (3) and not from Paleoproterozoic crystalline rocks of this massif, or other Korean Precambrian basement terranes, and (4) should be viewed as independent tectonic units that had sources not exposed in Korea.</P> <P>A thorough literature review reveals that the Yeoncheon Complex and the Taean Formation were potentially sourced from the Liuling, Nanwan and Foziling groups in the Qinling–Dabie Belt, which all show very similar detrital zircon age spectra. These immature middle–late Devonian sandstones were deposited in a pro-foreland basin formed as a result of the aborted subduction of the South Qinling Terrane below the North Qinling Terrane, which was uplifted and eroded during post-collision isostatic rebound. The submarine fans where the mature distal turbiditic Yeoncheon and Taean sandstones were deposited may have constituted the eastern terminal part of a routing system originating in the uplifted and eroded middle Paleozoic Qinling Belt and adjacent part of the foreland basin.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Paleoproterozoic Gyeonggi basement massif was not major detritus supplier of Yeoncheon Complex and Taean Formation. </LI> <LI> Main detritus: distant Early Neoproterozoic and mid Paleozoic magmatic rocks. </LI> <LI> Possible source: the Paleozoic Qinling–Dabie Belt, China. </LI> <LI> Low-angle ductile fault contact between Yeoncheon Complex, Taean Formation and Gyeonggi Massif. </LI> <LI> Middle Devonian Yeoncheon Complex and Taean turbidites do not belong to Gyeonggi Massif. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Han, Sang Hoon,Kim, Saegun,De, Umasankar,Mishra, Neeraj Kumar,Park, Jihye,Sharma, Satyasheel,Kwak, Jong Hwan,Han, Sangil,Kim, Hyung Sik,Kim, In Su American Chemical Society 2016 Journal of organic chemistry Vol.81 No.24
<P>The weakly coordinating ketone group directed C-H functionalizations of chromones, 1,4-naphthoquinones, and xanthones with various maleimides under rhodium(III) catalysis are described. These protocols efficiently provide a range of succinimide-containing chromones, naphthoquinones, and xanthones with excellent site selectivity and functional group compatibility. All synthetic compounds were screened for in vitro anticancer activity against human breast adenocarcinoma cell lines (MCF-7). In particular, compounds 7aa and 7ca with a naphthoquinone scaffold were found to be highly cytotoxic, with an activity competitive with anticancer agent doxorubicin.</P>
Kyootai Lee,Han-Gyun Woo,Taeyoung Park,Simon De Jong 한국경영정보학회 2023 한국경영정보학회 학술대회논문집 Vol.2023 No.11
This study identifies a key cognitive mechanism through which information encountered by managers influences their pursuit of ambidexterity when implementing new technologies in organizations. Additionally, it investigates the roles of managers’ understanding of technological environments and risk-taking strategies of their organizations in this relationship. We conducted three studies with managers at the above-middle level in the context of artificial intelligence implementations. The results indicate that managers with situationally induced promotion focus tend to have greater opportunity appraisal (Studies 1, 2, and 3) and pursuit of ambidexterity (Studies 2 and 3) compared to those with situationally induced prevention focus. Opportunity appraisal mediates the relationship between situationally induced regulatory focus and ambidexterity pursuit (Studies 2 and 3). Further, organizational risk-taking strategy moderates the links from situationally induced regulatory focus to opportunity appraisal to ambidexterity (Study 3). This study contributes to the theoretical understanding of the cognitive processes underlying managers’ pursuit of ambidexterity.
Characterization of rDNAs and Tandem Repeats in the Heterochromatin of Brassica rapa
Beom-Seok Park,임기병,Hans de Jong,Tae-Jin Yang,Jee-Young Park,Soo-Jin Kwon,Jung Sun Kim,Myung-Ho Lim,Jin A Kim,Mina Jin,Yong-Moon Jin,Seog Hyung Kim,임용표,방재욱,Ho-Il Kim 한국분자세포생물학회 2005 Molecules and cells Vol.19 No.3
We describe the morphology and molecular organization of heterochromatin domains in the interphase nuclei, and mitotic and eiotic chromosomes, of Brassica rapa, using DAPI staining and fluorescence in situhybridization (FISH) of rDNA and ericentromere tandem repeats. We have developed a simple method to distinguish the centromeric regions of mitotic metaphase chromosomes by prolonged irradiation with UV light at the DAPI excitation wavelength. Application of this bleached DAPI band (BDB) karyotyping method to the 45S and 5S rDNAs and 176 bp centromere satellite repeats distinguished the 10 B. rapa chromosomes. We further characterized the centromeric repeat sequences in BAC end sequences. These fell into two classes, CentBr1 and CentBr2, occupying the centromeres of eight and two chromosomes, respectively. The centromere satellites encompassed about 30% of the total chromosomes, particularly in the core centromere blocks of all the chromosomes. Interestingly, centromere length was inversely correlated with chromosome length. The morphology and molecular organization of heterochromatin domains in interphase nuclei, and in mitotic and meiotic chromosomes, were further characterized by DAPI staining and FISH of rDNA and CentBr. The DAPI fluorescence of interphase nuclei revealed ten to twenty conspicuous chromocenters, each composed of the heterochromatin of up to four chromosomes and/or nucleolar organizing regions.
Characterization of rDNAs and tandem repeats in the heterochromatin of Brassica rapa.
Lim, Ki-Byung,de Jong, Hans,Yang, Tae-Jin,Park, Jee-Young,Kwon, Soo-Jin,Kim, Jung Sun,Lim, Myung-Ho,Kim, Jin A,Jin, Mina,Jin, Yong-Moon,Kim, Seog Hyung,Lim, Yong Pyo,Bang, Jae-Wook,Kim, Ho-Il,Park, Be Korean Society for Molecular Biology 2005 Molecules and cells Vol.19 No.3
<P>We describe the morphology and molecular organization of heterochromatin domains in the interphase nuclei, and mitotic and meiotic chromosomes, of Brassica rapa, using DAPI staining and fluorescence in situ hybridization (FISH) of rDNA and pericentromere tandem repeats. We have developed a simple method to distinguish the centromeric regions of mitotic metaphase chromosomes by prolonged irradiation with UV light at the DAPI excitation wavelength. Application of this bleached DAPI band (BDB) karyotyping method to the 45S and 5S rDNAs and 176 bp centromere satellite repeats distinguished the 10 B. rapa chromosomes. We further characterized the centromeric repeat sequences in BAC end sequences. These fell into two classes, CentBr1 and CentBr2, occupying the centromeres of eight and two chromosomes, respectively. The centromere satellites encompassed about 30% of the total chromosomes, particularly in the core centromere blocks of all the chromosomes. Interestingly, centromere length was inversely correlated with chromosome length. The morphology and molecular organization of heterochromatin domains in interphase nuclei, and in mitotic and meiotic chromosomes, were further characterized by DAPI staining and FISH of rDNA and CentBr. The DAPI fluorescence of interphase nuclei revealed ten to twenty conspicuous chromocenters, each composed of the heterochromatin of up to four chromosomes and/or nucleolar organizing regions.</P>
尹正佑,全淙漢,吳俊燮,柳大佑,朴秉琦 경북대학교 의학연구소 1965 慶北醫大誌 Vol.6 No.1
A case of retinoblastoma with lymphogenous metastasis is reported in a 28 months old girl. The patient had retinoblastoma with metastasis to preauricular and submaxillary lymphnodes, which was comfirmed by histopathologic study. Microscopically there were found retinoblastoma cells around the blood vessels, with necrosis and calcification in areas remote from vascular supply, and the affected lymphnodes were almost completely replaced by tumor cells. Although it is difficult to ascertain whehter the metastasis was lymphogenous, the retinoblastoma cells infilterating conjunctiva seem to be invaded to preauricular and submaxillary lymphnodes through lateral and medial lymphatics.