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Aflatoxin B_1과 Vitamin A가 發生中인 白鼠의 肝에 미치는 影響
李斗泳,朴景蘭,盧承武,金源式 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2
For the study on the effect of aflatoxin B_1 and vitamnin A on the developing fetal rat liver, aflatoxin B_1(1mg/kg, Sigma Chemicals) was administered intraperitoneally on the 8th day of pregnancy and vitamin A (50,000IU/day, Sigma Chemicals) was administered orally from the 8th day of pregnancy to a day before sacrifice daily. Under ether anesthesia, removed uterus, opened the pregnant sac, and fetuses were fixed in the 10% neutral buffered formalin solution. The 5㎛ thick liver specimens were stained with H-E and the mitotic figures were counted under high power field(x400) of light microscope. The results were as followings: 1. Aflatoxin B_1 inhibited the liver cell mitosis. 2. On the 14th day of development, vitamin A inhibited the antimitotic effect of aflatoxin B_1.
Highly efficient removal of three red dyes by adsorption onto Mg–Al-layered double hydroxide
Ran-ran Shan,Liang-guo Yan,Yan-ming Yang,Kun Yang,Shu-jun Yu,Hai-qin Yu,Bao-cun Zhu,Bin Du 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The Mg–Al-CO3-LDH with Mg2+/Al3+ molar ratio of 2 was prepared via coprecipitation method atconstant pH of 9–10 and used to remove three red dyes by batch adsorption method. The results showedthe Mg–Al-LDH were well crystallized and can adsorb the red dyes effectively. The optimal adsorbentdosage and contact time were 1.0 g and 60 min, respectively. Adsorbed amount hardly changed whenpH < 10. The adsorption kinetics fit the pseudo-second order kinetic models well and isothermscorrespond to Langmuir model strictly. All the relevant mechanisms were studied and manifested asanion exchange and also electrostatic attraction for CR.
Xiao-Ran Li,En-Bo Ma,Liang-Zhen Yan,Han Meng,Xiao-Wei Du,Zhe-Xue Quan 한국미생물학회 2013 The journal of microbiology Vol.51 No.4
Fermented foods and beverages are important parts of human diet. Fen liquor, a Chinese liquor is a fermented beverage that uses a traditional fermentation process. Starters are the main microbial source and also provide nutrients for microorganisms during fermentation. In this study, starters of Fen liquor were produced through a complex traditional fermentation process. To investigate the community structure and the composition of microorganisms in the starter production process, bacterial 16S rRNA and fungal internal transcribed spacer (ITS) regions were sequenced using clone libraries and pyrosequencing, respectively. There was much higher diversity among the bacteria than among the fungi in the starter production process. Bacteria on the surface of the starters belonged mostly to the Lactobacillaceae family,while members of the Bacillacae family were dominant in the interior of the samples that lacked access to air and water. In the fungi population, diversity was high only in the raw material. In all other samples, nearly all of the fungal sequences were from Pichia kudriavzevii, a member of the Saccharomycetaceae family. Nearly all samples showed similar fungal community structures, indicating that there was little change in the fungal community. To the best of our knowledge, this is the first report to reveal the whole process of the starter production of Chinese traditional liquor. The findings obtained in this study provide new insights into understanding the composition of the microbial community during the traditional Chinese liquor starter production process and information about the production process control and monitoring.
Distributed control system architecture for deep submergence rescue vehicles
Sun, Yushan,Ran, Xiangrui,Zhang, Guocheng,Wu, Fanyu,Du, Chengrong The Society of Naval Architects of Korea 2019 International Journal of Naval Architecture and Oc Vol.11 No.1
The control architectures of Chuan Suo (CS) deep submergence rescue vehicle are introduced. The hardware and software architectures are also discussed. The hardware part adopts a distributed control system composed of surface and underwater nodes. A computer is used as a surface control machine. Underwater equipment is based on a multi-board-embedded industrial computer with PC104 BUS, which contains IO, A/D, D/A, eight-channel serial, and power boards. The hardware and software parts complete data transmission through optical fibers. The software part involves an IPC of embedded Vxworks real-time operating system, upon which the operation of I/O, A/D, and D/A boards and serial ports is based on; this setup improves the real-time manipulation. The information flow is controlled by the software part, and the thrust distribution is introduced. A submergence vehicle heeling control method based on ballast water tank regulation is introduced to meet the special heeling requirements of the submergence rescue vehicle during docking. Finally, the feasibility and reliability of the entire system are verified by a pool test.
임신 제 2 삼분기에 진단된 Patau Syndrome
오영란 ( Young Ran O ),공두식 ( Du Sik Kong ),이건호 ( Geun Ho Lee ),백종우 ( Jong Woo Back ),강진희 ( Jin Hee Kang ),김유신 ( You Shin Kim ) 대한주산의학회 2005 Perinatology Vol.16 No.2
Patau syndrome is trisomy 13, one of the most common autosomal aberration associated with multiple congenital anomalies. Because trisomy 13 is generally associated with severe congenital anomalies and postpartum poor prognosis, antenatal diagnosis through antenatal ultra-sonogram and triple screening marker is very important. We present one case of trisomy 13 with abnormal ultrasound finding, holoprosencephaly, microcephaly, cleft lip and palate. And confirmed chromosomally with pregnancy termination.
전초란(Cho ran Jeon),김두얼(Du ol Kim) 한국법경제학회 2015 법경제학연구 Vol.12 No.3
우리나라의 변호사는 서울, 그 가운데서도 ‘서초, 강남’지역에 집중되어 있다. 본 논문은 2000년대에 일어난 변호사 수의 급격한 증가가 변호사의 지역적 집중에 어떤 영향을 미쳤는지 실증적으로 분석하였다. 2006년부터 2014년 기간 동안, 서울변호사회에 등록한 ‘ㄱ’성을 가진 변호사들의 지역 분포를 분석한 결과, 서초구와 강남구에 위치한 변호사의 비율은 65%에서 76%로 증가하였다. 변호사들의 진입, 퇴출, 지속, 이주 등을 분석해 본 바에 따르면, ‘서초, 강남’으로의 집중도 상승은 기본적으로 새로 변호사 면허를 취득한 30-40대 변호사들이 근무지를 서초, 강남 지역에 선택한 데 기인하였다. 이 같은 집중 심화가 소비자 후생에 미치는 영향에 대해서는 향후 심도 있는 분석이 이루어질 필요가 있다.
Fan Liang-Liang,Du Ran,Liu Ji-Shi,Jin Jie-Yuan,Wang Chen-Yu,Dong Yi,He Wan-Xia,Yan Ri-Qiang,Xiang Rong 생화학분자생물학회 2022 Experimental and molecular medicine Vol.54 No.-
Reticulon 3 (RTN3) is an endoplasmic reticulum protein that has previously been shown to play roles in neurodegenerative diseases, but little is known about its function in the kidneys. The aim of the present study was to clarify the roles of RTN3 in chronic kidney disease (CKD) and kidney fibrosis. In this study, RTN3 levels were measured in kidney tissues from healthy controls and CKD or kidney fibrosis patients. An RTN3-null mouse model was generated to explore the pathophysiological roles of RTN3 in the kidneys. The underlying mechanisms were studied in primary proximal tubular epithelial cells and HEK293 cells in vitro. The results showed that (1) a reduction in RTN3 in mice induces CKD and kidney fibrosis; (2) decreased RTN3 expression is found in patients with CKD; (3) RTN3 plays critical roles in regulating collagen biosynthesis and mitochondrial function; and (4) mechanistically, RTN3 regulates these phenotypes by interacting with GC-Rich Promoter Binding Protein 1 (GPBP1), which activates the IGF2-JAK2-STAT3 pathway. Our study indicates that RTN3 might play crucial roles in CKD and kidney fibrosis and that a reduction in RTN3 in the kidneys might be a risk factor for CKD and kidney fibrosis.
Zhao Gang,Zhang Ran,Wang Wei,Du Xiaoxiao 한국CDE학회 2022 Journal of computational design and engineering Vol.9 No.1
The simulation of large deformation contact problems has been a tough subject due to the existence of multiple nonlinearities, including geometric nonlinearity and contact interface nonlinearity. In this paper, we develop a novel method to compute the large deformation of 2D frictionless contact by employing Nitsche-based isogeometric analysis. The enforcement of contact constraints as one of the main issues in contact simulation is implemented by using Nitsche’s method, and the node-to-segment scheme is applied to the contact interface discretization. We detailedly derive the discrete formulations for 2D large deformation frictionless contact where NURBS is used for geometrical modeling and the Neo-Hookean hyperelastic materials are applied to describe the deformation of the model. The collocation method with Greville points is employed to integrate the contact interface and the classical Legendre–Gauss quadrature rule is used for contact bodies’ integration. The Lagrange multiplier method and penalty method are also implemented for comparison with Nitsche’s method. Several examples are investigated, and the obtained results are compared with that from commercial software ABAQUS to verify the effectiveness and accuracy of the Nitsche-based isogeometric analysis.