Higher-order electroelastic modelling of piezoelectric cylindrical nanoshell on elastic matrix

This paper develops electro-elastic relations of functionally graded cylindrical nanoshell integrated with intelligent layers subjected to multi-physics loads resting on elastic foundation.The piezoelectric layers are actuated with external applied voltage.The nanocore is assumed in-homogeneous in which the material properties are changed continuously and gradually along radial direction.Third-order shear deformation theory is used for the description of kinematic relations and electric potential distribution is assumed as combination of a linear function along thickness direction to show applied voltage and a longitudinal distribution.Electro-elastic size-dependent constitutive relations are developed based on nonlocal elasticity theory and generalized Hooke’s law.The principle of virtual work is used to derive governing equations in terms of four functions along the axial and the radial directions and longitudinal electric potential function.The numerical results including radial and longitudinal displacements are presented in terms of basic input parameters of the integrated cylindrical nanoshell such as initial electric potential,small scale parameter,length to radius ratio and two parameters of foundation.It is concluded that both displacements are increased with an increase in small-scale parameter and a decrease in applied electric potential.

Correlation of serum hepcidin and transferrin receptor contents with iron deficiency and micro-inflammatory response in patients with hemodialysis

Objective: To study the correlation of serum hepcidin (HEP) and transferrin receptor (sTfR) contents with iron deficiency and micro-inflammatory response in patients with hemodialysis. Methods: Patients undergoing maintenance hemodialysis in the Jingzhou Central Hospital between June 2014 and March 2017 were selected as MHD group, healthy volunteers receiving physical examination during the same period were selected as control group, serum was collected to determine the levels of HEP, sTfR, iron deficiency indexes, inflammatory response indexes and oxidative stress indexes, and the correlation between indicators was analyzed. Results: Serum HEP, sTfR, TNF-α, IL-17, IL-23, NOX2 and MDA levels of MHD group were higher than those of control group while SF, TRF, Aeplin, IL-10, SOD, GSH-P and TAC levels were lower than those of control group;serum Aeplin, IL-10, SOD, GSH-P and TAC levels of MHD group were negatively correlated with SF and TRF levels whereas the TNF-α, IL-17, IL-23, NOX2 and MDA levels were positively correlated with SF and TRF levels. Conclusions: The increase of serum HEP and sTfR in patients with hemodialysis can reflect the degree of iron deficiency and is closely related to the degree of micro-inflammatory response.

Ultrathin self-assembly MXene/Co-based bimetallic oxide heterostructures as superior and modulated microwave absorber

Lightweight and high-efficiency absorbing materials equipped with tunable electromagnetic properties are the foremost important factors for driving applications of 5 G smart era and military stealth.Stim-ulated by the remarkable merits of heterogeneous interface engineering,a series of unique flower-like Co-based multiphases nanostructures were successfully synthesized through identical hydrothermal method,and subsequently anchored on the Ti_(3)C_(2)T_(x)nanosheets.The suitable metal ion modulation is feasible to regulate the components,heterogeneous interfaces and defects for tailoring the electromag-netic parameters and microwave absorption(MA)property.Notably,the permittivity decreases of CMOT(CoO/MCo_(2)O_(4)/Ti_(3)C_(2)T_(x),M=Fe,Cu,Zn)composites proceed gradually in the order of Fe^(2+),Cu^(2+),Zn^(2+),while the MA performance with tunable absorption peak could be modulated subtly.The asobtained CFOT-12(10 wt%),CCOT-15(10 wt%)and CZOT-15(15 wt%)exhibit excellent MA capacity with a minimum reflection loss(RL_(min))of-41.06,-52.67,-52.52 dB and corresponding effective absorption bandwidth(EAB)of 3.68,4.48,3.92 GHz at 2.10,1.90,1.80 mm,respectively.This work expands a novel approach to construct multicomponent heterostructure for tuning the EM parameters and absorbing property,as well as realize the high efficient and light weight.

茶多酚调控自噬改善糖尿病心肌病的机制研究（英文）

目的:探究茶多酚对自噬的调控及对糖尿病心肌病大鼠心功能的影响。创新点:本研究提示了糖尿病可诱导心肌自噬水平增高,而茶多酚可抑制这一现象;相反,高脂血症可抑制心肌自噬,而茶多酚却能诱导被抑制的自噬。方法:各组大鼠造模成功后测定血中的血糖、血脂水平;心超检测大鼠心脏结构及功能变化;苏木精-伊红(H&E)染色观察心肌结构及病理改变;透射电镜观察自噬体的形态和数量;蛋白质印迹法(Western blotting)检测自噬相关蛋白LC3-II、SQSTM1/p62及Beclin-1的表达水平。结论:茶多酚对糖尿病心肌病大鼠心功能具有保护作用,机制可能通过调节自噬水平改善糖尿病心肌糖脂代谢紊乱有关。

Scalable synthesis of mesoporous FeS_(2) nanorods as highperformance anode materials for sodium-ion batteries

Sodium-ion batteries(SIBs),as highly promising alternatives to lithium-ion batteries(LIBs),can be widely used in a variety of next-generation energy storage systems.However,the current commercial graphite anodes of LIBs could not intercalate sodium ions to appreciable extent,and the electrochemical irreversibility hinders further application.Searching for a suitable anode material is a critical issue for the successful development of SIBs.Herein,we report a convenient,fast,and large-scale preparation method of mesoporous FeS_(2) nanorods.Our specially designed one-dimensional mesoporous structure of FeS_(2) takes full advantage of ultra-high strain relaxation as well as fast Na^(+)transport rate arising from microstructural characteristics.As a result,the mesoporous FeS_(2) nanorods exhibited excellent sodium storage performance.The discharge capacity was retained at 711.1 mAh·g^(-1) after 450 cycles at a current density of 1000 mA·g^(-1).The special microstructure and superior performance of mesoporous FeS_(2) nanorods represent a critical step for transition metal sulfides electrode materials toward practical SIBs application.