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| 1 | Surface strengthening and grain refinement of AZ31B magnesium alloy by ultrasonic cavitation modification显示文摘Ultrasonic cavitation modification(UCM)employs cavitation effect to induce strong plastic deformation on the material surface and improve surface properties.To explore the surface strengthening and grain refinement of materials by UCM,the UCM orthogonal experiments of AZ31 B magnesium alloy were carried out in water and kerosene,respectively.The effects of ultrasonic amplitude,distance from the sample,and processing time on Vickers hardness and grain size of the material were studied.The results showed that the Vickers hardness of samples increased to1.5–3 times after UCM in water,which was 23.77–48.19%higher than that in kerosene.The metallographic observation indicated the grains on the surface of AZ31 B were refined after UCM.The maximum fluctuation of grain size on the material surface was not more than 10 lm after UCM in water,and most of them were concentrated between 1.5 lm and 2.5 lm,while the former was more than 40 lm and the latter were concentrated between 2 lm and 10 lm in kerosene.This reflected that the grain refinement effect of UCM in water was better than that in kerosene.Ultrasonic cavitation can be used as a benign means to improve the surface properties of materials. | Linzheng YE Xijing ZHU Yan HE Tianjiao SONG Wei HU | 2021 | Chinese Journal of Aeronautics2021，34，4： | 6 |
| 2 | Overexpression of Bax sensitizes prostate cancer cells to TGF-β induced apoptosis显示文摘NRP-154 is a tumorigenic epithelial cell line derived from the preneoplastic dorsal-lateral prostate of rats. These cells are exquisitely sensitive to TGF-β induced apoptosis. In contrast, we find that NRP-154 cells can sustain overexpression of exogenous Bax protein, which is different from non-tumor cells where Bax functions as a ubiquitous stimulator of apoptosis. NRP-154 cells stably overexpressing Bax show increased sensitivity to TGF-β induced apoptosis. The degree of TGF-β induced apoptosis displays high correlation with cleavage of Bax at the amino-terminus. Our data indicate that prostate cancer cells can host high levels of latent Bax which can be activated through post-translational modification. | PeiHuiLIN ZuiPAN LinZHENG NaLI DavidDANIELPOUR JianJieMA | 2005 | Cell Research2005，15，3： | 2 |
| 3 | Transition from hepatic steatosis to steatohepatitis: Unique microRNA patterns and potential downstream functions and pathways显示文摘 | XiJin Yi‐pengChen MeiKong LinZheng Yi‐daYang You‐mingLi | 2012 | Journal of Gastroenterology and Hepatology2012，，2： | 1 |
| 4 | Ardipusilloside inhibits survival, invasion and metastasis of human hepatocellular carcinoma cells显示文摘 | Lianqing Lou Weiwei Ye Yongxin Chen Shuang Wu Linzheng Jin Jinke He Xingfei Tao Jinghong Zhu Xiangyi Chen Anmei Deng Jinhe Wang | 2012 | Phytomedicine2012，，7： | 1 |
| 5 | Effect of miRNA‐10b in regulating cellular steatosis level by targeting PPAR‐α expression, a novel mechanism for the pathogenesis of NAFLD显示文摘 | LinZheng Guo‐caiLv JifangSheng Yi‐daYang | 2009 | Journal of Gastroenterology and Hepatology2009，，1： | 1 |
| 6 | Responses of reactive oxygen metabolism and quality in mango fruit to exogenous oxalic acid or salicylic acid under chilling temperature stress显示文摘 | Zhan‐ShengDing Shi‐PingTian Xiao‐LinZheng Zhong‐WeiZhou YongXu | 2007 | Physiologia Plantarum2007，，1： | 1 |
| 7 | Experimental Study on Ultrasonic Cavitation Intensity Based on Fluorescence Analysis显示文摘The Ultrasonic cavitation effect has been widely used in mechanical engineering,chemical engineering,biomedicine,and many other fields.The quantitative characterization of ultrasonic cavitation intensity has always been a difficulty.Based on this,a fluorescence analysis method has been adopted to explore ultrasonic cavitation intensity in this paper.In the experiment of fluorescence intensity measurement,terephthalic acid(TA)was used as the fluorescent probe,ultrasonic power,ultrasonic frequency,and irradiation time were independent variables,and fluorescence intensity and fluorescence peak area were used as experimental results.The collapse of cavitation bubble will cause molecular bond breakage and release·OH,and the non-fluorescent substance TA will form the strong fluorescent substance TAOH with·OH.The spectra of the treated samples were measured by a F-7000 fluorescence spectrophotometer.The results showed that the fluorescence intensity and fluorescence peak area increased rapidly after ultrasonic cavitation treatment,and then increased slowly with the increase of ultrasonic power,which gradually increased with the increase of irradiation time.They first decreased and then increased with the increase of ultrasonic frequency from 20 kHz to 40 kHz.The irradiation time was the most influential factor,and the cavitation intensity of low frequency was higher overall.The fluorescence intensity and fluorescence peak area of the samples increased by 2-20 times after ultrasonic treatment,which could increase from 69 and 5238 to 1387 and 95451,respectively.After the irradiation time exceeded 25 min,the growth rate of fluorescence intensity slowed down,which was caused by the decrease of gas content and TA concentration in the solution.The study quantitatively characterized the cavitation intensity,reflecting the advantages of fluorescence analysis,and provided a basis for the further study of ultra-sonic cavitation. | Linzheng Ye Shida Chuai Xijing Zhu Dong Wang | 2023 | Chinese Journal of Mechanical Engineering2023，36，4： | 0 |
| 8 | Bessel Terahertz Pulses from Superluminal Laser Plasma Filaments显示文摘Terahertz radiation with a Bessel beam profile is demonstrated experimentally from a two-color laser filament in air,which is induced by tailored femtosecond laser pulses with an axicon.The temporal and spatial distributions of Bessel rings of the terahertz radiation are retrieved after being collected in the far field.A theoretical model is proposed,which suggests that such Bessel terahertz pulses are produced due to the combined effects of the inhomogeneous superluminal flament structure and the phase change of the two-color laser components inside the plasma channel.These two efects lead to wavefront crossover and constructive/destructive interference of terahertz radiation from different plasma sources along the laser flament,respectively.Compared with other methods,our technique can support the generation of Bessel pulses with broad spectral bandwidth.Such Bessel pulses can propagate to the far field without significant spatial spreading,which shall provide new opportunities for terahertz applications. | Zhelin Zhang Jiayang Zhang Yanping Chen Tianhao Xia Linzheng Wang Bonan Han Feng He Zhengming Sheng Jie Zhang | 2022 | Ultrafast Science2022，，1： | 0 |
| 9 | Acupoint Exploration A PRELIMINARY EXPLORATION OF THE CHARACTERISTICS OF SELECTING ACUPOINTS FOR EIGHT CATEGORIES OF PATTERNS OF IMBALANCE显示文摘With the help of computers,we have made statistics as to the frequency of se-lecting points for the eight categories of patterns of imbalance.We suggest that for the heat syn-drome,the points in the upper part should usually be selected,for the cold syndrome,the points inthe lower part should generally be adopted;for the exterior syndrome,the points on the yang surfaceshould mostly be selected,for the interior syndrome,the points on the yin surface should generally beadopted;for the asthenic syndrome,the points in the trunk should mostly be selected,for the sthenicsyndrome,the points at the extremities generally be adopted. | Liu Ligong Huang Xianming Wu Shaode Shanghai Research Institute of Acupuncture and Moxibustion,Shanghai 200030,ChinaZhang Linzheng Gu Jie Shangshai Traditional Chinese Medicine College,Shanghai 200030,China | 1993 | World Journal of Acupuncture-Moxibustion1993，3，2： | 0 |
| 10 | Experimental Investigation of Material Removal in Elliptical Vibration Cutting of Cortical Bone显示文摘To benefit tissue removal and postoperative rehabilitation,increased efficiency and accuracy and reduced operating force are strongly required in the osteotomy.A novel elliptical vibration cutting(EVC)has been introduced for bone cutting compared with conventional cutting(CC)in this paper.With the assistance of high-speed microscope imaging and the dynamometer,the material removals of cortical bone and their cutting forces from two cutting regimes were recorded and analysed comprehensively,which clearly demonstrated the chip morphology improvement and the average cutting force reduction in the EVC process.It also revealed that the elliptical vibration of the cutting tool could promote fracture propagation along the shear direction.These new findings will be of important theoretical and practical values to apply the innovative EVC process to the surgical procedures of the osteotomy. | Wei Bai Yuhao Zhai Jiaqi Zhao Guangchao Han Linzheng Ye Xijing Zhu Liming Shu Dong Wang | 2023 | Chinese Journal of Mechanical Engineering2023，36，2： | 0 |
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