http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
AN IMAGE CODING SCHEME BASED ON THE CLASSIFICATION
Wei, Wang,Jun, Cai De,Guan, Wan Fa 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1
Based on the spectral analysis of the discrete cosine transform (DCT), this paper proposes an adaptive image coding scheme, two activity measurements are designed to classify the image subblocks into four classes, various coding techniques are applied to every class, a good visual quality of the reconstructed image at bit rates of 0.2-0.4 bits/pixel (bpp) is achieved.
Jia-Wei Lv,Xiao-Dan Huang,Yu-Pei Chen,Guan-Qun Zhou,Ling-Long Tang,Yan-Ping Mao,Wen-Fei Li,Ai-Hua Lin,Jun Ma,Ying Sun 대한암학회 2018 Cancer Research and Treatment Vol.50 No.2
Purpose Conditional survival (CS) provides important information on survival for a period of time after diagnosis. Currently, information on CS patterns of patients with nasopharyngeal carcinoma (NPC) is lacking. We aimed to analyze survival rate over time and estimate CS for NPC patients using a national population-based registry. Materials and Methods Patients diagnosed with NPC between 1973 and 2007 with at least 5-year follow-up were identified from the Surveillance Epidemiology End Results registry. Traditional survival rates and crude CS estimates were calculated using Kaplan-Meier analysis. Risk-adjusted survival curves were plotted from the proportional hazards model using the correct group prognosis method. Results For 7,713 patients analyzed, adjusted baseline 5-year overall survival improved significantly from 36.0% in patients diagnosed in 1973-1979, 41.7% in 1980-1989, 46.6% in 1990- 1999, to 54.7% in 2000-2007 (p < 0.01). CS analysis demonstrated that for every additional year survived, adjusted probability of surviving the next 5 years increased from 66.7% (localized), 54.0% (regional), and 35.3% (distant) at the time of diagnosis, to 83.7% (localized), 75.0% (regional), and 62.2% (distant) for patients who had survived 5 years. Adjusted 5-year CS differed among age, sex, tumor histology, ethnicity, and stage subgroups initially, but converged with time. Conclusion Treatment outcomes of NPC patients have greatly improved over the decades. Increases in CS become more prominent in patients with distant disease than in those with localized or regional disease as patients survive longer. CS provides more dynamic prognostic information for patients who have survived a period of time after diagnosis.
Biological characterization of mesenchymal stem cells from bovine umbilical cord
Hui Xiong,Wei Jun Guan,Yue Hui Ma,Chunyu Bai,Shuang Wu,Yuhua Gao,Taofeng Lu,Qingyun Hu 한국통합생물학회 2014 Animal cells and systems Vol.18 No.1
Mesenchymal stem cells (MSCs) are multi-potential cells that are able to proliferate and differentiate into othercell types. Much research has been done on the MSCs from the umbilical cord (UCMSCs) in human, mice, andavian, but little literature has been published about these cells in big livestock. Here, we choose Luxi cattle asthe experimental animal, we describe an external culture of the UCMSCs from it and summarize the biologicalcharacteristics of these cells, e.g., morphologic appearance, surface antigens, colony-forming ability, geneexpression, and differentiation potential were detected via using immunofluorescence and reverse transcriptionpolymerase chain reaction (RT-PCR). The induced cells, osteoblast, lipoblast, hepatocyte, islet cells, andneurocyte were identified by Alizarin red staining, Oil-red-O staining, Periodic acid-schiff staining, andDithizone staining and RT-PCR detection for specific genes. Results suggest that biological characteristics ofthe UCMSCs were similar to those of MSCs previously analyzed. The primary UCMSCs were sub-cultured topassage 32, the UCMSCs expressed gene CD29, CD44, CD73, CD90, and CD166, induced cells illustratedtypical staining, and expressed specific genes, which indicate that the UCMSCs could be a novel alternativesource of MSCs for experimental and clinical applications.
( Na Luo ),( Guan Li ),( Yong Qing Li ),( Xiong Wei Fan ),( Yue Qun Wang ),( Xiang Li Ye ),( Xiao Yan Mo ),( Jun Mei Zhou ),( Wu Zhou Yuan ),( Ming Tan ),( Hua Ping Xie ),( Karen Ocorr ),( Rolf Bodmer 생화학분자생물학회 (구 한국생화학분자생물학회) 2010 BMB Reports Vol.43 No.5
The sterile alpha motif (SAM) is a putative protein interaction domain involved in a wide variety of biological processes. Here we report the identification and characterization of a novel gene, SAMD4B, which encodes a putative protein of 694 amino acids with a SAM domain. Northern blot and RT-PCR analysis showed that SAMD4B is widely expressed in human embryonic and adult tissues. Transcriptional activity assays show SAMD4B suppresses transcriptional activity of L8G5-luciferase. Over-expression of SAMD4B in mammalian cells inhibited the transcriptional activities of activator protein-1 (AP-1), p53 and p21, and the inhibitory effects can be relieved by siRNA. Deletion analysis indicates that the SAM domain is the main region for transcriptional suppression. The results suggest that SAMD4B is a widely expressed gene involved in AP-1-, p53-and p21-mediated transcriptional signaling activity. [BMB reports 2010; 43(5): 355-361]
Roles of Fibroblast Growth Factor-inducible 14 in Hepatocellular Carcinoma
Li, Nan,Hu, Wen-Jun,Shi, Jie,Xue, Jie,Guo, Wei-Xing,Zhang, Yang,Guan, Dong-Xian,Liu, Shu-Peng,Cheng, Yu-Qiang,Wu, Meng-Chao,Xie, Dong,Liu, Shan-Rong,Cheng, Shu-Qun Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.6
The prognostic value of the fibroblast growth factor-inducible 14 (Fn14) expression in hepatocellular carcinoma (HCC) is unknown. Real-time PCR (RT-PCR), western blot assays and immunohistochemistry analysis were here performed in order to compare Fn14 expressios in paired liver samples of HCC and normal liver tissue. Most of the tumor tissues expressed significantly higher levels of Fn14 compared to adjacent non-tumor tissues, with Fn14High accounting for 54.6% (142/260) of all patients. The Pearson ${\chi}^2$ test indicated that Fn14 expression was closely associated with serum alpha fetal protein (AFP) (P=0.002) and tumor number (p=0.019). Univariate and multivariate analyses revealed that along with tumor diameter and portal vein tumor thrombosis (PVTT ) type, Fn14 was an independent prognostic factor for both overall survival (OS) (HR=1.398, p=0.008) and recurrence (HR=1.541, p=0.001) rates. Fn14 overexpression HCC correlated with poor surgical outcome, and this molecule may be a candidate biomarker for prognosis as well as a target for therapy.
Xiao-Hua Zuo,Zhi-Jun Dong,Guan-Ming Yuan,Zheng-Wei Cui,Xuan-Ke Li 한양대학교 세라믹연구소 2021 Journal of Ceramic Processing Research Vol.22 No.1
Polycarbosilane, B-Si and B-Si-Zr modification coal tar pitch were used as impregnate agent for infiltration and pyrolysis formation of carbon/carbon (abbreviated as C/C) composites with B4C-SiC-ZrC-ZrB2 coating. The density of the composites was examined to be 1.0 g·cm-3, 1.4 g·cm-3 and 1.8 g·cm-3, respectively. The phase compositions, surface morphologies and element distributions of the coating were analyzed by X-ray diffraction (XRD) scanning electron microscopy (SEM) and energy dispervive spectroscopy (EDS), respectively. The result showed that the two composites with a density of 1.4 g·cm-3 and 1.8 g·cm-3 displayed compact microstructures. The oxidation behavior of the composites was studied by oxidation in air at temperatures from 800 to 1,550 ℃ for 1 h. The composites with a density of 1.8 g·cm-3 exhibited a lower weight loss of 1.8 % after oxidation. B4C-SiC-ZrC-ZrB2 coating was found to provide the best protection by the precipitated B2O3, SiO2 and ZrO2 on the surface of the composites during the oxidation process, which were characterized by self-healing and antioxidation. The C/C composites with B4C-SiC-ZrC-ZrB2 coating performed well at high temperatures with the formation of complex oxides glass film that prevented oxygen from further spreading into the matrix.
Dynamic analysis of Ca^(2+) level during bovine oocytes maturation and early embryonic development
Su Li Liang,Qian Jun Zhao,Xiang Chen Li,Ya Ping Jin,Yi Peng Wang,Xiao Hua Su,Wei Jun Guan,Yue Hui Ma 대한수의학회 2011 Journal of Veterinary Science Vol.12 No.2
Mammalian oocyte maturation and early embryo development processes are Ca^(2+)-dependent. In this study, we used confocal microscopy to investigate the distribution pattern of Ca^(2+) and its dynamic changes in the processes of bovine oocytes maturation, in vitro fertilization (IVF), parthenogenetic activation (PA) and somatic cell nuclear transfer (SCNT) embryo development. During the germinal vesicle (GV) and GV breakdown stage, Ca^(2+) was distributed in the cortical ooplasm and throughout the oocytes from the MI to MII stage. In IVF embryos, Ca^(2+)was distributed in the cortical ooplasm before the formation of the pronucleus. In 4-8 cell embryos and morulas, Ca^(2+) was present throughout the blastomere. In PA embryos, Ca^(2+) was distributed throughout the blastomere at 48 h, similar to in the 4-cell and 8-cell phase and the morula. At 6 h after activation, there was almost no distribution of Ca^(2+) in the SCNT embryos. However, Ca^(2+) was distributed in the donor nucleus at 10 h and it was distributed throughout the blastomere in the 2-8 cell embryos. In this study, Ca^(2+) showed significant fluctuations with regularity of IVF and SCNT groups, but PA did not. Systematic investigation of the Ca^(2+) location and distribution changes during oocyte maturation and early embryo development processes should facilitate a better understanding of the mechanisms involved in oocyte maturation, reconstructed embryo activation and development, ultimately improving the reconstructed embryo development rate.
Differentiation potential of neural stem cells derived from fetal sheep
Qian Li,Minghai Zhang,Wei Jun Guan,Shuang Zhang,Yanjie Zheng,Hebao Wen,Xiao Han 한국통합생물학회 2017 Animal cells and systems Vol.21 No.4
Neural stem cells (NSCs) are multipotent stem cells that can differentiate into many cell types in vitro. In this study, we isolated and established an NSC line from fetal Ovis aries. Based on the results of immunofluorescence staining, NSCs expressed Nestin, Pax6 and MAP2. Moreover, a reverse transcription–polymerase chain reaction assay was used to biologically characterize the cell line. NSCs were induced to differentiate into neurogenic cells in vitro. They expressed MAP2, glial fibrillary acidic protein (GFAP) and myelin basic protein (MBP). In this study, we successfully isolated and cultivated NSCs from the hippocampal tissue of fetal sheep. NSCs not only displayed a self-renewal capacity but also had the potential to differentiate into neurons and glial cells. This study provided valuable experimental data for NSC transplant research.
Abietane Diterpenoids from Perovskia atriplicifolia and Their Anti-HBV Activities
Zhi-Yong Jiang,Zhong-Qiu Li,Chao-Guan Huang,Jun Zhou,Qiu-Fen Hu,Wen-Xing Liu,Xiang-Zhong Huang,Wei Wang,Li-Zhu Zhang,Fu-Ting Xia 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.2
Bioassay-guided phytochemical investigation on the 90% EtOH extract of Perovskia atriplicifolia resulted in the isolation of eight abietane diterpenoids, including three new ones (1–3). Based on spectroscopic methods involving 1D and 2D NMR spectroscopy techniques, mass spectrometry, and optical rotation, the structures of the new compounds (1–3) were unambiguously characterized. Compounds 1–2 and 4–8 were evaluated for their anti-HBV (hepatitis B virus) activity in HepG 2.2.15 cell line. Results suggested rosmadial (8) had the most anti-HBV potency, suppressing the secretion of HBsAg and HBeAg, with IC50 values of 0.09 and 0.34 mM, respectively.