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Yan, Bing Chun,Park, Joon Ha,Kim, Sung Koo,Choi, Jung Hoon,Lee, Choong Hyun,Yoo, Ki-Yeon,Kwon, Young-Geun,Kim, Young-Myeong,Kim, Jong-Dai,Won, Moo-Ho Kluwer Academic/Plenum Publishers 2012 Cellular and molecular neurobiology Vol.32 No.8
<P>In the present study, we investigated neuronal death/damage in the gerbil hippocampal CA1 region (CA1) and compared changes in some trophic factors, such as brain-derived neurotrophic factor (BDNF), glial cell line-derived neurotrophic factor (GDNF) and vascular endothelial growth factor (VEGF), in the CA1 between the adult and young gerbils after 5 min of transient cerebral ischemia. Most of pyramidal neurons (89%) were damaged 4 days after ischemia-reperfusion (I-R) in the adult; however, in the young, about 59% of pyramidal neurons were damaged 7 days after I-R. The immunoreactivity and levels of BDNF and VEGF, not GDNF, in the CA1 of the normal young were lower than those in the normal adult. Four days after I-R in the adult group, the immunoreactivity and levels of BDNF and VEGF were distinctively decreased, and the immunoreactivity and level of GDNF were increased. However, in the young group, all of their immunoreactivities and levels were much higher than those in the normal young group. From 7 days after I-R, all the immunoreactivities and levels were apparently decreased compared to those of the normal adult and young. In brief, we confirmed our recent finding: more delayed and less neuronal death occurred in the young following I-R, and we newly found that the immunoreactivities of trophic factors, such as BDNF, GDNF, and VEGF, in the stratum pyramidale of the CA1 in the young gerbil were much higher than those in the adult gerbil 4 days after transient cerebral ischemia.</P>
金武漢,尹錫天,宋寅春,鄭秀永,韓辰錫 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.1
In this study it is the aim to analize the climate conditions influencing to the early frost damage of concrete such as temperature, precipitation, wind, and snow in winter seasons, and this study provided the basical reasonable data as a guideline for preparation of Korean Architectural Standard Specifications for the building activities throughout the winter seasons in the future.
조용주,임춘성,신기태,허영무 한국경영과학회 2003 한국경영과학회 학술대회논문집 Vol.- No.1
현재 금형공장에서는 변화하는 시장에 빠른 반응을 보이고, 생산하고 있는 제품의 높은 품질과 낮은 가격을 보장하기 위하여 기존 시스템과 인터넷을 접목하려는 많은 시도를 하고 있다. 금형공장에는 ETO(Engineering-To-Order) 방식의 제조방식과 사출금형의 특수성으로 인하여 표준견적 시스템의 개발이 어렵다. 그리고 영업과 수주에 반영할 객관적인 정보가 없으며, 고객의 요청 시 실시간으로 확인 가능한 정보가 존재하지 않는다. 이러한 금형공장의 특징을 반영하고, 문제점을 극복할 수 있는 협업적 전자주문 처리 시스템의 프레임윅(framework)을 설계하고, 또한 각 세부 모듈인 견적가격 산정기능(Cost Estimation Tool), 납기 가능일자 산정기능(Leadtime Tool), 주문상황 응답처리 기능(Order Status Tool), 작업상황 파악기능(Shop Status Tool)을 설계한다. 그리고 현장 적용이 가능하도록 하기 위하여 금형공장의 업무 프로세스를 분석한다. 그리고 주문처리 프로세스의 UMM방법론 모델링을 통하여 윈형(prototype) 시스템을 설계 및 개발하고자 한다.
심주선,조숙녀,손화,김무성,노영덕,김세영,양덕춘 경희대학교식량자원개발연구소 2005 硏究論文集 Vol.24 No.-
더덕은 식용, 관상용, 생약재료로 쓰이는 방향성 식물이다. 본 연구는, 종자의 기내배양을 통하여 식물체 재분화와 뿌리발달을 실험했다. 종자의 발아는 GA_(3) 100 mg·L(-1)처리와 저온처리 시 매우 양호하였다. 더덕의 기내에서 shoot의 형성은 2 mg·L^(-1) BA, 2 mg·L(-1) NAA가 첨가된 MS 기본배지에서 가장 양호하였으며, 줄기의 절편체와 비교하여 잎 절편체에서 재분화가 잘되었다. 또한 뿌리의 발육은 계속적인 계대배양에 의해서 양호하였는데 shoot의 길이를 1 cm 정도 남긴 뿌리를 연속적으로 4회 계대배양에서 뿌리가 주근으로 발육하였으며 길이는 약 3 cm 및 직경은 0.5 cm의 정상적인 뿌리를 얻을 수 있었다. Codonopsis lanceolata is widely used as edibles, ornamental plant and crude drug material. This study was carried out to confirm the ratio of germination and efficient differentiation of shoot and root in vitro. The germination of Codonopsis lanceolata seed was excellent in the medium with GA_(3) 100 mg·L(-1) and chilling treatment. The shoot formation of Codonopsis lanceolata was good at the MS medium with 2 mg·L(-1) BA and 2 mg·L(-1) NAA. According to inoculum part, ratio of re-differentiation was higher from the leaf explant compared with the stem explant. For root development, successive subculture with 1 cm shoot of upper part from root was efficient. Roots of Codonopsis lanceolata cultured in vitro system was grown like normal root with length of 3 cm and thickness of 0.5 cm at the 4 successive subcultures.
인삼 Peroxidase(PgPrx3) 유전자의 분리 및 연초의 형질전환
손화,심주선,김세영,노영덕,김무성,양덕춘 경희대학교식량자원개발연구소 2005 硏究論文集 Vol.24 No.-
Peroxidase는 항산화에 관련된 효소이며 식물의 환경스트레스와 성장에 관련되는 중요한 유전자이다. 본 실험에서 사용된 Peroxidase Ⅲ의 cDNA는 Panax ginseng C.A. Meyer 잎에서 추출하였으며 PgPrx3라 명명하였다. 이 gene의 ORF영역은 1,065 bP이고 355개의 아미노산을 가지고 있다. BioEdit 프로그램을 이용하여 PgPrx3와 다른 식물의 peroxidase gene과 비교한 결과 상동성을 가지고 있었으며, Spinacia oleracea(70%), Vigna angulais(71%), Nicotiana tabacum(69%) and Linum usitatissimum(65%). 그중 Vigna angularis의 상동성이 가장 높았다. 담배에 본 유전자를 형질전환시켜 유전자의 특성을 검정하기 위하여 35S/35S/AMV/peroxidas/Tnos를 벡터 pRD400에 재조합 후 아그로박테리아를 이용하여 담배에 도입시켰다. 그리고 PCR를 이용하여 유전자 PgPrx3가 담배에 도입된 것을 확인하였으며, RT-PCR로 정상적으로 PgPrx3 유전자가 전사되어 RNA를 생성하고 있음을 확인하였다. A peroxidase (E.C. 1.11.1.7) is very important enzyme as antioxidants. The function of this gene is connected with growth and environmental stress of plant. A class Ⅲ peroxidase cDNA was isolated from the leaf of Panax ginseng C.A. Meyer and named as PgPrx3 which is consisted of an ORF (open reading frame) of 1,065 bp and an amino acid of 355 residues. BioEdit software was used to compare the PgPrx3 amino acid sequence with other plants that showed homologies with Spinacia oleracea (70%), Vigna angularis (71%), Nicotiana tabacum (69%) and Linum usitatissimum (65%). The peroxidase of Vigna angulatis was the most homologous with ginseng. The chimeric PgPrx3 gene, 35S/35S/AMV/peroxidas/ Tnos, was constructed in the binary vector pRD400. Agrobacterium tumefaciens strain LBA4404 harboring disarmed Ti-plasmid was used to transform Nicotiana tabacum L. using the leaf disc. Incorporation of the chimeric gene PgPrx3 into plants were confirmed by PCR analysis of genomic DNA and RT-PCR analysis of mRNA from transgenic tobacco. The PgPrx3 gene from ginseng was stably expressed in transgenic tobacco plants.
Yan, Bing Chun,Park, Joon Ha,Ahn, Ji Hyeon,Lee, Young Joo,Lee, Tae Hun,Lee, Choong Hyun,Cho, Jun Hwi,Kim, Myong Jo,Kim, Tae Young,Kang, Il-Jun,Won, Moo-Ho Kluwer Academic/Plenum Publishers 2012 Neurochem Res Vol.37 No.5
<P>In the present study, we compared the immunoreactivities and levels of Trx/prx redox system, thioredoxin 2 (Trx2), thioredoxin reductase 2 (TrxR2) and peroxiredoxin 3 (Prx3), as well as neuronal death in the hippocampal CA1 region between the adult and young gerbil after 5 min of transient cerebral ischemia. At 4 days post-ischemia, pyramidal neurons (about 90%) in the adult stratum pyramidale of the CA1 region showed 'delayed neuronal death (DND)'; however, at this time point, few pyramidal neurons showed DND in the young stratum pyramidale. At 7 days post-ischemia, about 56% of pyramidal neurons showed DND in the young stratum pyramidale. The immunoreactivities of all the antioxidants in the young sham-group were similar to those in the adult sham-group. At 4 days post-ischemia, the immunoreactivity of TrxR2, not Trx2 and Prx3 in the adult ischemia-group was dramatically decreased in CA1 pyramidal neurons. At this time point, the immunoreactivities of all the antioxidants in the young ischemia-group were apparently increased compared to the adult ischemia-group. From 7 days pots-ischemia, non-pyramidal cells showed the immunoreactivities of all the antioxidants in the ischemic CA1 region; however, in the young ischemia-groups, the immunoreactivities were much lower than those in the adult ischemia-groups. In brief, our results showed that the immunoreactivities of Trx2, TrxR2 and Prx3 were dramatically increased in CA1 pyramidal neurons of the young ischemia-groups at 4 days post-ischemia compared to those in the adult ischemia-groups induced by transient cerebral ischemia.</P>
UBV CCD PHOTOMETRY OF THE INTERMEDIATE AGE OPEN CLUSTER NGC 6716
CHUN MOO-YOUNG,LEE SEE-WOO The Korean Astronomical Society 1996 Journal of The Korean Astronomical Society Vol.29 No.2
NGC 6716 is an intermediate-age open cluster in Sagittarius. In this paper, we present the new UBV CCD photometry of the stars in the cluster, which is deeper than previous ones. From the color-color diagram and the color-magnitude diagram, we derived a reddening $E_{B- V} = 0.17\pm0.03$ and a distance modulus of the cluster, $(V - Mv)_o = 9.2\pm0.1$. An age of the cluster is estimated as $8\pm10^7 yrs$ from the latest isochrone. Luminosity function and mass function of the cluster are derived. The gradient of the mass function of bright stars is a bit steep, $\Gamma = -1.85\pm0.05$, and there is no distinct bump and dip in the mass function.