Novel graphitic carbon nitride(g-C_(3)N_(4))nanosheet/Bi_(5)O_(7)Br/NH_(2)-MIL-88B(Fe)photocatalysts(denoted as GCN-NSh/Bi_(5)O_(7)Br/FeMOF,in which MOF is metal–organic framework)with double S-scheme heterojunctions...Novel graphitic carbon nitride(g-C_(3)N_(4))nanosheet/Bi_(5)O_(7)Br/NH_(2)-MIL-88B(Fe)photocatalysts(denoted as GCN-NSh/Bi_(5)O_(7)Br/FeMOF,in which MOF is metal–organic framework)with double S-scheme heterojunctions were synthesized by a facile solvothermal route.The resultant materials were examined by X-ray photoelectron spectrometer(XPS),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX),transmission electron microscopy(TEM),high-resolution transmission electron microscopy(HRTEM),photoluminescence spectroscopy(PL),Fourier transform infrared spectroscopy(FT-IR),UV-Vis diffuse reflection spectroscopy(UV-vis DRS),photocurrent density,electrochemical impedance spectroscopy(EIS),and Brunauer–Emmett–Teller(BET)analyses.After the integration of Fe-MOF with GCN-NSh/Bi_(5)O_(7)Br,the removal constant of tetracycline over the optimal GCN-NSh/Bi_(5)O_(7)Br/Fe-MOF(15wt%)nanocomposite was promoted 33 times compared with that of the pristine GCN.The GCN-NSh/Bi_(5)O_(7)Br/Fe-MOF(15wt%)nanocomposite showed superior photoactivity to azithromycin,metronidazole,and cephalexin removal that was 36.4,20.2,and 14.6 times higher than that of pure GCN,respectively.Radical quenching tests showed that·O_(2)-and h+mainly contributed to the elimination reaction.In addition,the nanocomposite maintained excellent activity after 4 successive cycles.Based on the developed n–n heterojunctions among n-GCN-NSh,n-Bi_(5)O_(7)Br,and n-Fe-MOF semiconductors,the double S-scheme charge transfer mechanism was proposed for the destruction of the selected antibiotics.展开更多
Objective To investigate the effects of the B7-H4 gene rs10754339 and miR-125a gene rs12976445 on cancer susceptibility through a case-control study and meta-analysis.Methods A total of 1,490 cancer patients(lung/gast...Objective To investigate the effects of the B7-H4 gene rs10754339 and miR-125a gene rs12976445 on cancer susceptibility through a case-control study and meta-analysis.Methods A total of 1,490 cancer patients(lung/gastric/liver/:550/460/480)and 800 controls were recruited in this case-control study.The meta-analysis was performed by pooling the data from previous related studies and the present study.Results The results of this study showed that in the Hubei Han Chinese population,the rs10754339gene was significantly associated with the risk of lung and gastric cancer but not liver cancer,and the rs12976445 gene was significantly associated with the risk of lung cancer but not liver or gastric cancer.The meta-analysis results indicated that rs10754339 and rs12976445 contributed to cancer susceptibility in the Chinese population and also revealed a significant association between rs10754339and breast cancer risk,as well as between rs12976445 and lung cancer risk.Conclusion The B7-H4 gene rs10754339 and miR-125a gene rs12976445 may be the potential genetic markers for cancer susceptibility in the Chinese population,which should be validated in future studies with larger sample sizes in other ethnic populations.展开更多
【目的】研究盐穗木乙醛脱氢酶7B4基因(HcALDH7B4)在原核细胞中的耐盐抗旱功能,为耐盐抗旱育种提供候选基因。【方法】利用qRT-PCR检测高盐和干旱胁迫下HcALDH7B4基因的表达水平;利用原核表达重组大肠杆菌(pET-28a-HcALDH7B4)在盐旱胁...【目的】研究盐穗木乙醛脱氢酶7B4基因(HcALDH7B4)在原核细胞中的耐盐抗旱功能,为耐盐抗旱育种提供候选基因。【方法】利用qRT-PCR检测高盐和干旱胁迫下HcALDH7B4基因的表达水平;利用原核表达重组大肠杆菌(pET-28a-HcALDH7B4)在盐旱胁迫下的菌落大小和生长活力分析其盐旱抗性。【结果】在600 mM NaCl处理和自然干旱条件下,盐穗木同化枝中HcALDH7B4被显著诱导。相较对照菌株(pET-28a),原核表达的重组大肠杆菌在500 mM NaCl、500 mM KCl和500 mM、800 mM Mannitol胁迫下表现出更好的生长活力。【结论】盐穗木HcALDH7B4是一个胁迫应答基因,可以提高重组菌盐旱胁迫的耐受性。展开更多
文摘由于桥梁裂缝图像具有分布不规则、缝宽较小、背景像素比例较高等特性,为提高其检测精度和速度,提出了一种改进的YOLOv4算法,优化原主干网络CSPDarkNet53为EfficientNet B7网络以增强特征学习能力,并使用深度可分离卷积代替标准卷积,在提升模型运行效率的同时,也提高了其检测精度和准确率.并通过平移、旋转等数据增强方法将数据集正负样本扩增至6371张,增强了网络的拟合效果和泛化能力.实验结果表明:YOLOv4-EfficientNet B7的均值平均精度(Mean Average Precision,mAP)为80.11%,比YOLOv4的高出3.85%;检测精确率(precision)为80.13%,召回率(recall)由74.34%提升至78.63%,F1值(F1-score)高达80.61%,提高了2.94%;相较于原YOLOv4算法,检测精确率提高了1.86%,召回率增长了4.29%;与其他主流的裂缝检测算法相比,本算法在mAP和召回率上都有了显著提升,实现了精确检测桥梁裂缝的目的.
文摘Novel graphitic carbon nitride(g-C_(3)N_(4))nanosheet/Bi_(5)O_(7)Br/NH_(2)-MIL-88B(Fe)photocatalysts(denoted as GCN-NSh/Bi_(5)O_(7)Br/FeMOF,in which MOF is metal–organic framework)with double S-scheme heterojunctions were synthesized by a facile solvothermal route.The resultant materials were examined by X-ray photoelectron spectrometer(XPS),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX),transmission electron microscopy(TEM),high-resolution transmission electron microscopy(HRTEM),photoluminescence spectroscopy(PL),Fourier transform infrared spectroscopy(FT-IR),UV-Vis diffuse reflection spectroscopy(UV-vis DRS),photocurrent density,electrochemical impedance spectroscopy(EIS),and Brunauer–Emmett–Teller(BET)analyses.After the integration of Fe-MOF with GCN-NSh/Bi_(5)O_(7)Br,the removal constant of tetracycline over the optimal GCN-NSh/Bi_(5)O_(7)Br/Fe-MOF(15wt%)nanocomposite was promoted 33 times compared with that of the pristine GCN.The GCN-NSh/Bi_(5)O_(7)Br/Fe-MOF(15wt%)nanocomposite showed superior photoactivity to azithromycin,metronidazole,and cephalexin removal that was 36.4,20.2,and 14.6 times higher than that of pure GCN,respectively.Radical quenching tests showed that·O_(2)-and h+mainly contributed to the elimination reaction.In addition,the nanocomposite maintained excellent activity after 4 successive cycles.Based on the developed n–n heterojunctions among n-GCN-NSh,n-Bi_(5)O_(7)Br,and n-Fe-MOF semiconductors,the double S-scheme charge transfer mechanism was proposed for the destruction of the selected antibiotics.
基金supported by the Fundamental Research Funds for the Central Universities (WUT:2020IB029)。
文摘Objective To investigate the effects of the B7-H4 gene rs10754339 and miR-125a gene rs12976445 on cancer susceptibility through a case-control study and meta-analysis.Methods A total of 1,490 cancer patients(lung/gastric/liver/:550/460/480)and 800 controls were recruited in this case-control study.The meta-analysis was performed by pooling the data from previous related studies and the present study.Results The results of this study showed that in the Hubei Han Chinese population,the rs10754339gene was significantly associated with the risk of lung and gastric cancer but not liver cancer,and the rs12976445 gene was significantly associated with the risk of lung cancer but not liver or gastric cancer.The meta-analysis results indicated that rs10754339 and rs12976445 contributed to cancer susceptibility in the Chinese population and also revealed a significant association between rs10754339and breast cancer risk,as well as between rs12976445 and lung cancer risk.Conclusion The B7-H4 gene rs10754339 and miR-125a gene rs12976445 may be the potential genetic markers for cancer susceptibility in the Chinese population,which should be validated in future studies with larger sample sizes in other ethnic populations.
文摘【目的】研究盐穗木乙醛脱氢酶7B4基因(HcALDH7B4)在原核细胞中的耐盐抗旱功能,为耐盐抗旱育种提供候选基因。【方法】利用qRT-PCR检测高盐和干旱胁迫下HcALDH7B4基因的表达水平;利用原核表达重组大肠杆菌(pET-28a-HcALDH7B4)在盐旱胁迫下的菌落大小和生长活力分析其盐旱抗性。【结果】在600 mM NaCl处理和自然干旱条件下,盐穗木同化枝中HcALDH7B4被显著诱导。相较对照菌株(pET-28a),原核表达的重组大肠杆菌在500 mM NaCl、500 mM KCl和500 mM、800 mM Mannitol胁迫下表现出更好的生长活力。【结论】盐穗木HcALDH7B4是一个胁迫应答基因,可以提高重组菌盐旱胁迫的耐受性。
