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| 1 | Surface integrity and fatigue behavior when turning γ-TiAl alloy with optimized PVD-coated carbide inserts显示文摘This paper presents a comprehensive investigation on the effects of tool and turning parameters on surface integrity and fatigue behavior in turning c-Ti Al alloy. The wear of inserts surface, cutting forces, and surface roughness were studied to optimize PVD-coated carbide inserts.Surface topography, residual stresses, microhardness, and microstructure were analyzed to characterize the surfaces layer under different turning parameters. Surface integrity and fatigue life tests of c-Ti Al alloy were conducted under turning and turning-polishing processes. The results show that compared to CNMG120412-MF4, CNMG120408-SM is more suitable because it obtained low cutting force, surface roughness, and tool wear. With increasing the cutting speed and depth, the depths of the compressive residual stress layer, hardening layer, and plastic deformation layer increased. For turning and turning-polishing specimens, the compressive residual stress was relaxed by less than 20%–30% after 10~7 cycles. The fatigue life of a turning-polishing specimen with R_a= 0.15 mm has increased 3 times from that of a turning specimen with R_a= 0.43 mm. | Changfeng YAO Jiannan LIN Daoxia WU Junxue REN | 2018 | Chinese Journal of Aeronautics2018，31，4： | 9 |
| 2 | Photostable and Biocompatible Fluorescent Silicon Nanoparticles for Imaging-Guided Co-Delivery of siRNA and Doxorubicin to Drug-Resistant Cancer Cells显示文摘The development of effective and safe vehicles to deliver small interfering RNA(siRNA) and chemotherapeutics remains a major challenge in RNA interference-based combination therapy with chemotherapeutics,which has emerged as a powerful platform to treat drug-resistant cancer cells.Herein,we describe the development of novel all-in-one fluorescent silicon nanoparticles(SiNPs)-based nanomedicine platform for imaging-guided co-delivery of siRNA and doxorubicin(DOX).This approach enhanced therapeutic efficacy in multidrug-resistant breast cancer cells(i.e.,MCF-7/ADR cells).Typically,the SiNP-based nanocarriers enhanced the stability of siRNA in a biological environment(i.e.,medium or RNase A) and imparted the responsive release behavior of siRNA,resulting in approximately 80% down-regulation of P-glycoprotein expression.Co-delivery of P-glycoprotein siRNA and DOX led to>35-fold decrease in the half maximal inhibitory concentration of DOX in comparison with free DOX,indicating the pronounced therapeutic efficiency of the resultant nanocomposites for drug-resistant breast cancer cells.The intracellular time-dependent release behaviors of siRNA and DOX were revealed through tracking the strong and stable fluorescence of SiNPs.These data provide valuable information for designing effective RNA interference-based co-delivery carriers. | Daoxia Guo Xiaoyuan Ji Fei Peng Yiling Zhong Binbin Chu Yuanyuan Su Yao He | 2019 | Nano-Micro Letters2019，11，2： | 5 |
| 3 | Traditional Chinese medicine molecule-assisted chemical synthesis of fluorescent anti-cancer silicon nanoparUcles显示文摘 | Xiaoyuan Ji Daoxia Guo Bin Song Sicong Wu Binbin Chu Yuanyuan Su Yao He | 2018 | Nano Research2018，11，10： | 3 |
| 4 | Fluorescent silicon nanoparticles-based nanotheranostic agents for rapid diagnosis and treatment of bacteria-induced keratitis显示文摘Recommended as a medical emergency,infectious keratitis with an acute and rapid disease progression can lead to serious damage of vision and even blindness.Herein,we present a kind of theranostic agents,which are made of vancomycin(Van)-modified fluorescent silicon nanoparticles(SiNPs-Van),enabling rapid and non-invasive diagnosis and treatment of Gram-positive bacteria-induced keratitis in a simultaneous manner.Typically,the resultant SiNPs-Van nanoagents have an ability of imaging bacteria in a short time both in vitro(5 min)and in vivo(10 min),making them an efficacious diagnostic agent for the detection of bacterial keratitis.In addition,the SiNPs-Van feature distinct antimicrobial activity,with superior activity of 92.5%at a concentration of 0.5 ng/mL against Staphylococcus aureus(S.aureus);comparatively,the antimicrobial rate of free vancomycin is 23.3%at the same concentration.We further explore the SiNPs-Van agents as eye drops for therapy of S.aureus-induced bacterial keratitis on rat model.Represented by slit-lamp scores,the keratitis severity of SiNPs-Van-treated corneas is 3.4,which is 59.6%and 77.3%slighter than vancomycin-(8.2 score)and PBS-treated corneas(15.0 score),respectively.The infected corneas recover to normal(1 score)after 7-d of SiNPs-Van treatment.Above results suggest that the SiNPs-Van could serve as a new kind of high-quality nanotheranostic agents,especially suitable for simultaneous diagnosis and therapy of Gram-positive bacteria keratitis. | Lu Zhang Xiaoyuan Ji Yuanyuan Su Xia Zhai Hua Xu Bin Song Airui Jiang Daoxia Guo Yao He | 2021 | Nano Research2021，14，1： | 2 |
| 5 | Luteolin enhances TNF-related apoptosis-inducing ligand’s anticancer activity in a lung cancer xenograft mouse model显示文摘 | Jiaqi Yan Qiong Wang Xuelian Zheng Hong Sun Yuqiong Zhou Daoxia Li Yong Lin Xia Wang | 2011 | Biochemical and Biophysical Research Communications2011，，2： | 1 |
| 6 | Effects of cutting parameters on surface residual stress and its mecha- nism in high-speed milling of TB6显示文摘 | YAO Changfeng WU Daoxia TAN Liang | 2013 | Proceedings of the In- stitution of Mechanical Engineers Part B: Journal of Engi- neering Manufacture2013，227，4： | 1 |
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