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[Purpose]: To understand the mental health level (HAMA) and trait coping style (TCSQ) of the Chinese aid Guyana medical team members (CAGMTM) under the new coronavirus (COVID-19) epidemic, in order to take effective measures to improve the CAGMTM Mental health provides a theoretical basis. [Method]: From October 2020 to March 2021, the team members have worked and lived in Guyana for 6 months. The mental health level (Hamilton Anxiety Scale, HAMA) and trait coping styles were investigated for 16 team members who aided Guyana. [Results]: The HAMA score of the CAGMTM was (14.75±5.12); 14 doctors had a score of (15.57+6.01); 2 chefs had a score of (17.5+7.78). The results of multivariate regression analysis showed that among the CAGMTM. Whether there are team members in isolation (t=3.383, p

We synthesize the size-tailored Ce:Li4Ti5O12 via a facile solid-state method. During the synthesis, a carbon-coating forms in-situ on the Ce:Li4Ti5O12 particles to limit their grain growth. The coating is later removed to facilitate the Li+ diffusion during charge/discharge. The composition, structure, and morphology of the obtained samples are characterized by powder X-ray diffraction, X-ray photoelectron spectroscopy, inductively coupled plasma elemental analysis, thermal gravimetric analysis, scanning electron microscopy, and transmission electron microscopy. The results confirm the particle-size tailoring effect induced by the carbon-coating. The size-tailored Ce:Li4Ti5O12 electrode demonstrates high reversible capacity of 164, 161, 158, 149, 136, and 116 mAh g−1 at 0.5C, 1C, 2C, 5C, 10C, and 20C, respectively, which are significantly improved from the pristine Li4Ti5O12. Moreover, it is also capable of maintaining 96% and 92% of the initial capacity at the high rate of 10C and 20C after 1000 cycles, exhibiting excellent cycling stability. Finally, we fabricate a full cell with LiFePO4 cathode, which delivers reversible capacity of 110 mAh g−1 at 5C with little capacity fading after 1200 cycles, confirming the outstanding electrochemical performance of size-tailored Ce:Li4Ti5O12 anode.

We report a facile synthetic method to produce the interconnected hollow carbon spheres with various wall-thickness (as low as 9 nm). Instead of synthesizing and dispersing the silica hard templates in advance, we produce the templates in-situ to form the interconnected hollow-sphere structure. This interconnected structure provides a fast and efficient pathway for electron transfer. Meanwhile, decreasing the wall-thickness effectively shortens the distance of ion diffusion, which further promotes the high-rate performances of the interconnected hollow carbon spheres. For supercapacitor applications, at 1 A g−1, the MF-1.1-20 (with 9-nm wall-thickness) electrode demonstrates a high specific capacitance of 208 F g−1 and retains 93% of its initial capacity after 10000 cycles. Under a large current density of 20 A g−1, MF-1.1-20's specific capacity remains 153 F g−1, demonstrating excellent high-rate performances. In another aspect, as the electrode for lithium-sulfur battery, MF-1.1-20/S composite electrode demonstrates high specific capacity of 996 mAh g−1 and 465 mAh g−1 at 0.2C and 10C, respectively. The excellent electrochemical behavior of the interconnected hollow carbon spheres demonstrates their potential for applications in high-rate energy storage devices.

Combining graphene with iron oxide has shown great promise in mitigating the pulverization of iron-oxide anode during fast charge/discharge in lithium-ion batteries. However, the attachment between hydrophilic iron oxide and hydrophobic graphene sheets could potentially compromise during cycling, affecting its cycling stability. By exploiting the polymerization characteristics of pyrrole, we anchor and subsequently wrap the Fe(OH)3 colloidal nanoparticles onto graphene oxide surface with polypyrrole. The composite is further annealed to give polypyrrole-derived-carbon (PPy-C) wrapped Fe3O4@graphene (Fe3O4@graphene@PPy-C). PPy-C strengthens the interaction between the Fe3O4 and the graphene and helps preserving the structural integrity during cycling. As an anode material, Fe3O4@graphene@PPy-C composite exhibits a high reversible capacity of 721 mA h g−1 over 320 cycles at a current density of 0.2 A g−1. Even at a high current density of 2 A g−1, the electrode still achieves a high capacity of 406 mA h g−1. This strategy provides a new alternative to improve the cycling stability of iron-oxide/carbon composite anodes.

Additional file 3. Supplement Table 3. Co-expression regulatory network of 85 transcription factors (TFs) and the 12 prognostic-related differentially expressed immune-related genes (DEIRGs).

Additional file 1. Supplement Table 1. The list of 399 Differentially expressed immune-related genes (DEIRGs) including 349 up-regulated DEIRGs and 50 down-regulated DEIRGs.

Additional file 2. Supplement Table 2. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis of 399 differentially expressed immune-related genes (DEIRGs).