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Variations in mesenchymal-epithelial transition-related transcription factors during reprogramming of somatic cells from different germ layers into iPSCs 认领 引用
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作者 Xiaoyin Lu Yukai Wang +3 位作者 Long Yan Libin Wang Wei Li Hongmei Wang 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2016年第10期609-612,共4页
Introducing a combination of transcription factors such as Oct4,Sox2,Klf4 and c-Myc（OSKM）enables reprogramming which converts somatic cells into induced pluripotent stem cells（i PSCs）（Takahashi and Yamanaka,2006... Introducing a combination of transcription factors such as Oct4,Sox2,Klf4 and c-Myc（OSKM）enables reprogramming which converts somatic cells into induced pluripotent stem cells（i PSCs）（Takahashi and Yamanaka,2006）.i PSCs play an important role in clinical and regenerative medicine because they can be utilized to model a specific disease or differentiate into functional cells for transplantation.Enhancing the efficiency of induction and improving the qualities of iPSCs are constant themes in this field. 展开更多
关键词 PSCs Variations in mesenchymal-epithelial transition-related transcription factors during reprogramming of somatic cells from different germ layers into iPSCs
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New statistical model for radar HRRP target recognition 认领 引用 被引量：2
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作者 Qingyu Hou Feng Chen +1 位作者 Hongwei Liu Zheng Bao 《Journal of Systems Engineering and Electronics》 SCIE EI 2010年第2期204-210,共7页
The mixture of factor analyzers(MFA)can accurately describe high resolution range profile(HRRP)statistical charac-teristics.But how to determine the proper number of the models is a problem.This paper develops a varia... The mixture of factor analyzers(MFA)can accurately describe high resolution range profile(HRRP)statistical charac-teristics.But how to determine the proper number of the models is a problem.This paper develops a variational Bayesian mixture of factor analyzers(VBMFA)model.This procedure can obtain a lower bound on the Bayesian integral using the Jensen's inequality.An analytical solution of the Bayesian integral could be obtained by a hypothesis that latent variables in the model are indepen-dent.During computing the parameters of the model,birth-death moves are utilized to determine the optimal number of model au-tomatically.Experimental results for measured data show that the VBMFA method has better recognition performance than FA and MFA method. 展开更多
关键词 radar automatic target recognition(RATR) high reso-lution range profile(HRRP) variational Bayesian mixtures of factor analyzers(VBMFA) variational Bayesian(VB) mixtures of factor analyzers(MFA).
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Crystal-field analyses for trivalent lanthanide ions in LiYF_4 认领 引用 被引量：1
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作者 程军 闻军 +2 位作者 陈永虎 尹民 段昌奎 《Journal of Rare Earths》 SCIE EI CAS CSCD 2016年第10期1048-1052,共5页
Based on the completely parametric crystal-field model, the energy level parameters, including free-ion parameters and crystal-field parameters, obtained by fitting the experimental energy level data sets of Ln^（3＋... Based on the completely parametric crystal-field model, the energy level parameters, including free-ion parameters and crystal-field parameters, obtained by fitting the experimental energy level data sets of Ln^（3＋） in LiYF_4 were systematically analyzed. The results revealed that the regular variation trends of the major parameters at relatively low site symmetry still existed. The g factors of ground states were calculated using the parameters obtained from least-squares fitting. The results for Ce^（3＋）, Nd^（3＋）, Sm^（3＋）, Dy^（3＋） and Yb^（3＋） were in good agreement with experiment, while those of Er^（3＋） deviated from experiment dramatically. Further study showed that the g factors depended strongly on B_4~6, and a slightly different B_4~6 value of -580cm^（-1） led to g factors agreeing well with the experimental values. 展开更多
关键词 crystal-field interactions LiYF4 lanthanide ions variation trends g factors rare earths
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Effect of Escherichia coli and Aeromonas hydrophila on Some Abiotic Properties of Water Stored in Aerobic and Anaerobic Conditions 认领 引用
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作者 Ahmadou Fadimatou Antoine Tamsa Arfao +7 位作者 Olive Vivien Noah Ewoti Fils Mamert Onana Brice Hermann Tcholong Fokouong Awawou Manouore Njoya Romeo Tagne Fodouop Guy Epole Etame Souad El Hajjaji Nola Moise 《Advances in Microbiology》 CAS 2024年第12期663-677,共15页
Few studies have been carried out to date on the influence of bacteria on variations in the abiotic properties of water. The aim of the present work was to evaluate the influence of Escherichia coli and Aeromonas hydr... Few studies have been carried out to date on the influence of bacteria on variations in the abiotic properties of water. The aim of the present work was to evaluate the influence of Escherichia coli and Aeromonas hydrophila on some abiotic properties of groundwater stored under aerobic or anaerobic conditions. Experiments were performed in the presence of monospecific cells and bispecific cells. The incubation temperatures were 4˚C and 23˚C. The incubation (storage) times were 6 h, 12 h, 24 h, 48 h and 72 h. Bacteriological analyses were carried out using culture and physicochemical analyses using appropriate techniques. The results show that in the presence of monospecific cells and under aerobic conditions, E. coli abundances were relatively lower than under anaerobic conditions. The opposite was observed in the presence of bispecific cells. In most cases, minimum cell abundances were observed after 6 hours of storage. The same was true for A. hydrophila cells. The values of pH, electrical conductivity and ammonium ions in the water on the day of sampling varied over time. The pH values were relatively higher at 4˚C in the presence of E. coli cells alone, and at 23˚C in the presence of A. hydrophila cells. Ammonium ion levels were relatively higher at 4˚C under anaerobic conditions for both bacterial species. The highest electrical conductivity value was observed at 23˚C in the presence of E. coli cells, and at 4˚C in the presence of A. hydrophila cells, under anaerobic conditions. Electrical conductivity is higher in the presence of A. hydrophila with fluctuations from 169 to 285 µS/cm after 24 h incubation and 259 µS/cm after 6 hours incubation at 4˚C and 23˚C respectively. Under anaerobic conditions and in the presence of E. coli, the conductivity varied from 169 µS/cm at sampling to 274 µS/cm after 72 hours of incubation at 4˚C and from 169 to 289 after 24 hours. Under the same experimental conditions and in the presence of A. hydrophila, the electrical conductivity is higher at 4˚C with a value of 299 µS/cm after 24 hours. In the monospecific condition and under aerobic and anaerobic conditions and at an incubation temperature of 4˚C, the increase in the abundance of E. coli cells is significantly and positively correlated with the increase in pH values. In the mixed condition, pH is very significantly and positively correlated with the abundance of commensal Escherichia coli in anaerobic conditions (P NH4+) is significantly and negatively correlated with cellular concentrations of A. hydrophila in both aerobic and anaerobic conditions. 展开更多
关键词 Groundwater Escherichia coli A. hydrophila Storage Variation in Abiotic Factors
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Upper Ocean Response Mechanisms to Pre-Monsoon and Post-Monsoon Cyclones in the Bay of Bengal 认领 引用
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作者 Siraj Uddin Md Babar Chowdhury Anik Karmakar +3 位作者 Md Enamul Hoque Md Minarul Hoque Tabassum Hossain Tahsin Showmitra Chowdhury 《Ocean-Land-Atmosphere Research》 CSCD 2025年第3期236-254,共19页
Tropical cyclones are intense and frequent natural hazards in the Bay of Bengal(BoB),leading to substantial losses of life and property along coastal areas.Understanding the seasonal variations and environmental facto... Tropical cyclones are intense and frequent natural hazards in the Bay of Bengal(BoB),leading to substantial losses of life and property along coastal areas.Understanding the seasonal variations and environmental factors that influence cyclone behavior in this region is essential for effective disaster preparedness and mitigation.This study conducts a comparative analysis of pre-monsoon and post-monsoon tropical cyclones of identical categories on upper oceanic parameters,including sea surface temperature(SST),sea surface salinity(SSS),sea level pressure(SLP),mixed layer depth(MLD),chlorophyll-a,and Ekman transport in the BoB.SSTs exhibit seasonal variation during cyclonic events,with pre-monsoon temperatures ranging from 29 to 31℃,compared to post-monsoon of 28 to 29℃. 展开更多
关键词 seasonal variations environmental factors upper ocean response comparative analysis post monsoon pre monsoon disaster preparedness tropical cyclones Bay Bengal
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