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Polymer blends are regarded as a straightforward and effective method to enhance the energy storage performance of dielectric film capacitors. However, how the components and structures within the blend systems affect the energy density and efficiency remains insufficiently explored in-depth. In this discourse, employing a polymer blend of ferroelectric and linear dielectric phases as a paradigm, we perform phase-field simulations to elucidate the effects of ferroelectric phase volume fractions, geometrical dimensions, and the dielectric constant of the linear phase on the energy storage capabilities. Concurrently, we have devised six divergent blending microstructures to probe the ramifications of structural variances on the overarching performance metrics. We also analyze the domain configurations and switching dynamics under varying electric fields to understand the performance variations and delineate the determinants conducive to superior energy density and efficiency. This paper theoretically establishes the component–content–structure–performance relationships of different polymer blend systems, which is expected to better guide the innovative design of new polymer blend dielectrics. [ABSTRACT FROM AUTHOR]

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Aim: To investigate the effect of microRNA-1 (miR-1) on tumor endothelial cells (TECs) of human hepatocellular carcinoma (HCC)., Methods: MiR-1 specific short hairpin RNA (shRNA) was synthesized and cloned into a recombinant lentiviral vector. TECs were then infected by the miRNA-1-shRNA recombinant lentivirus. TECs were divided into three groups: a control (CON) group consisting of normal TECs without lentiviral infection, a negative control (NC) group consisting of normal TECs infected with a negative control virus, and a micro-down (MD) group consisting of normal TECs infected with the miR-1-inhibition virus containing the target gene. Silencing of miR-1 expression was quantified via quantitative reverse transcription-polymerase chain reaction (qRT-PCR). The proliferation of TECs was detected using MTT (Thiazolyl Blue Tetrazolium Bromide) assay; the observations were continued for 5 d, and the optical density value at 490 nm was detected every day. Apoptosis was detected via flow cytometry using Annexin V-APC single staining. The migration and invasion of TECs were detected using transwell assays., Results: Lentiviral miR-1 shRNA was successfully transduced into TECs, and specifically silenced the expression of miR-1. The results of qRT-PCR showed that the expression of miR-1 was significantly decreased in the MD group (2(-ΔΔCt) = 0.57 ± 0.14) compared with the CON group (2(-ΔΔCt) = 1) and the NC group (2(-ΔΔCt) = 1.05 ± 0.13) (P < 0.01). The results of MTT assay showed that the cell proliferation was all significantly inhibited in the MD group in the 5 days compared with the CON and NC groups (P < 0.01). The results of flow cytometry showed that the apoptosis was significantly increased in the MD group (6.32% ± 0.33%) compared with the CON group (2.03% ± 0.30%) and the NC group (2.18% ± 0.15%) (P < 0.01). The ability of cell migration was significantly inhibited in the MD group (62.0 ± 5.48) compared with the CON group (99.8 ± 3.11) and the NC group (97.2 ± 3.70) (P < 0.01). The ability of invasion of TECs was also significantly inhibited in the MD group (29.8 ± 2.39) compared with the CON group (44.6 ± 3.36) and the NC group (44.4 ± 5.17) (P < 0.01)., Conclusion: MiR-1 might be a potential tumor activator. Inhibiting its expression could decrease proliferation, induce apoptosis, and inhibit the migration and invasion of TECs of human HCC.