The phase transitions of Li3PO4 solid electrolyte for secondary batteries during heating and isothermal annealing in air have been studied by using real-time synchrotron X-ray scattering. As results of the heating annealing in air, the crystal β-Li3PO4 phase only existed from RT to 440 °C. The crystal γ-Li3PO4 phase appeared at 450 °C and the crystal β-Li3PO4 phase disappeared at 480 °C. The transition from the β-Li3PO4 to the γ-Li3PO4 phases occurred mainly at 450 °C. In the early hours of the isothermal annealing at 450 °C in air, the β-Li3PO4 and the γ-Li3PO4 phases existed together. As the annealing time increased to 12 hours, the β-Li3PO4 phase was wholly transitioned to γ-Li3PO4 phase. Our study revealed the detailed transition behavior from β-Li3PO4 to γ-Li3PO4 phases during real-time annealing in air.
Barium titanate (BaTiO3) crystals have various crystal structures, such as tripartite, cubic, tetragonal, hexagonal, and orthogonal, and their asymmetric crystal structure gives them significant ferroelectric, piezoelectric, and thermoelectric properties. This article first summarizes the basic crystal structure and existence conditions of BaTiO3. Secondly, the advantages and disadvantages of solid-state sintering, sol–gel, hydrothermal and coprecipitation methods for preparing BaTiO3 were compared. It was also found that BaTiO3 composite nanofiber membrane with high flexibility and stable structure could be prepared by sol–gel electrospinning and high-temperature sintering process, providing a reference basis for the application of BaTiO3 low dimensional materials in different fields such as sensors, energy storage devices, and catalysis.
By impregnating modified carbon nanotubes (CNTs) with Nafion in an ester solution, we prepared and characterized CNTs-Nafion composite materials using FT-IR. We fabricated a composite electrode, Ti/Nafion-CNTs/PbO2, through the coating and electro-deposition processes on a titanium substrate. Additionally, we characterized the physical and electrochemical properties of the composite electrode using techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and cyclic voltammetry (CV). We analyzed the ability to generate hydroxyl radicals and the electrocatalytic oxidation of methyl orange by the composite electrode to assess its electrocatalytic oxidation capability. The results indicate that incorporating CNTs-Nafion composite material into the composite electrode can modify the electrode’s electrochemical properties and enhance its electrocatalytic oxidation capability.
In this study, we investigated the role of miR-23b-3p in renal cell carcinoma (RCC) progression and lipid accumulation by regulating SREBP-1c, aiming to identify potential biomarkers and therapeutic targets for RCC management. We assessed miR-23b-3p and SREBP-1c expressions in RCC cell lines ACHN, A498, and Caki-2, compared with normal HRCE cells. A498 cells showed notably elevated miR-23b-3p and SREBP-1c levels. Inhibition of miR-23b-3p reduced A498 cell viability, migration, invasion, FASN, ACC1, SCD1, and SREBP-1c expression, and triglyceride content. Overexpression of SREBP-1c reversed the effects of miR-23b-3p downregulation on cell viability and triglyceride levels in A498 cells. Our findings highlight the role of miR-23b-3p in promoting RCC progression and lipid accumulation via SREBP-1c activation, providing potential avenues for novel biomarkers and therapeutic targets in RCC management.
Research on ovarian cancer, the most dangerous female reproductive tumor, requires deeper understanding of its development and effective therapies. Eupalinolide B (EB), found in Eupatorium lindleyanum DC., shows potential against ovarian cancer, but its precise impact and mechanisms are unclear. This study aims to assess EB’s effect on ovarian cancer cells and uncover its underlying mechanism. The CCK8 assay was used to detect the effect of EB on the proliferation of ovarian cancer Anglne cells and A2780 cells. The wound healing assay was used to detect the effect of EB on the migration of Anglne cells and A2780 cell. The expression of ST6GalI was determined by WB. After 12, 24, and 48 hours of treatment, the proliferation activity and migration of EB-treated cells was significantly reduced. The inhibitory effect of EB on the proliferation and migration of ovarian cancer Anglne cells and A2780 cells showed a time-dependent and concentration dependent manner. WB results showed that after 48 h treatment with EB, the protein expression of ST6GalI in ovarian cancer Anglne cells and A2780 cells significantly decreased. EB inhibited the proliferation and migration of ovarian cancer Anglne cells and A2780 cells, and its mechanism of action may be related to the decrease in ST6GalI mediated sialylation levels.
