Results 61 to 70 of about 319 (106)

[Exploration and application of nanotechnology in precision transarterial chemoembolization for hepatocellular carcinoma]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Kong JQ, Li R, Zuo RN, Zhang X, Ding ZH, Dai Y.   +5 more
europepmc   +1 more source

ZnO压敏电阻的制备工艺优化及其性能对比研究

Dianci bileiqi
本研究探讨了采用分段压制技术，制备具有一定梯度结构的ZnO压敏电阻，旨在通过优化分段配方比例，调节电阻片在厚度方向上的显微结构，提高电阻片的抗大电流冲击能力。通过扫描电子显微镜观察了ZnO晶粒尺寸在外段和中段的分布，通过压敏电阻测试仪和冲击电流发生器分别测试了电阻片的压敏电压、非线性系数与10kA 8/20μs雷电波残压比、2ms方波电流通流能力和4/10μs最大冲击电流。实验结果表明，通过优化晶粒尺寸和能量分布，优化后的工艺不仅保持了良好的压敏电压和非线性系数，电阻片的整体性能得到了显著提升 ...
董建洪
doaj  

[Applications of ordered porous materials in chromatography separation and analysis]. [PDF]

Se Pu
Wang ZX, Wang DD, Wang ST, Song YY.
europepmc   +1 more source

Hierarchical evolution of bone biomimicry and osteo-coagulo-immunomodulation induced by the size of biological hydroxyapatite. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Xu J, Zhao Y, Liu H, Yin J, Chen Z.
europepmc   +1 more source

[Application of nanomaterials-enhanced magnetic resonance imaging in precise diagnosis of pan-vascular diseases]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Li Y, Zhang P, Zhang N.
europepmc   +1 more source

Y/Ce共掺杂对高梯度压敏陶瓷电阻综合电性能的改善

Dianci bileiqi
对ZnO基压敏电阻进行了Y、Ce两种元素的共掺杂，通过改变Y和Ce之间的比例，寻找最优的Y、Ce共掺杂比例。通过X射线衍射仪、扫描电镜对样品的微观结构进行表征，利用对数正态分布概率密度函数对晶粒粒径分布进行了拟合。利用金属氧化物直流参数测试仪对样品的压敏电压、漏电流和非线性系数进行测量，利用脉冲电流测试设备测试样品的8/20μs雷电波残压比与2ms方波电流通流能力。采用精密阻抗分析仪测试样品的C-V特性曲线。研究发现当Y、Ce两种元素协同作用时，能使ZnO晶粒尺寸分布最优化。当两种稀土离子的比例合适时 ...
董建洪
doaj  

[Synthesis of a temperature-responsive multimodal motion microrobot capable of precise navigation for targeted controllable drug release]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zhao X, Liu M, Chen X, Huang J, Liu Y, Xu H.   +5 more
europepmc   +1 more source

An investigation of the microstructure and mechanical properties of dental zirconia manufactured by digital light processing 3D printing. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi, 2021
Mei ZY, Lu YQ, Lou YX, Zhang JJ, Sun ML, Yu HY.   +5 more
europepmc   +1 more source

Effect of speed sintering and aging on the translucency of high-translucent zirconia. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Li Y, Zhong M, Yang Y.
europepmc   +1 more source

[Imaging Diagnosis of Ischemic Stroke Through Multiparametric Magnetic Resonance Angiography Enhanced by NaGdF₄ Nanoparticles]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Wu J, Ma Y, Yue S, Zhang X, Li W, Zhang N.   +5 more
europepmc   +1 more source