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This study introduces an innovative approach to enhance the absorption capabilities of skin‐core dual‐domain structure radar‐absorbing materials (SDSRAM) composed of thin‐ply laminates and honeycomb. The upper skin laminates consist of transmissive skin and impedance matching layer. The impedance matching layer was hot‐pressed using functionalized absorbed thin‐ply glass fibers prepregs, flaked carbonyl iron powder (FCIP) and multi‐walled carbon nanotubes (MWCNTs) as the absorber. The lower skin was manufactured using carbon fiber‐plated nickel. The core is prepared by honeycomb modified (HCM). The permittivity and permeability of the skin laminates and the HCM were measured by wave‐guide method. The impact of FCIP/MWCNT on the electromagnetic (EM) parameters of the thin‐ply laminates and the influence of MWCNTs on the permittivity of the honeycomb were investigated. Microwave absorption properties of SDSRAM were assessed through the measurement of reflection loss (RL) using the arch method and simulated using the microwave simulation software CST studio suite 2020. Experimental verification was conducted to confirm the absorbing performance. The results show that the effective absorption bandwidth (RL < 10 dB) of SDSRAM covers the frequency range of 2.2–18 GHz, with a maximum absorption intensity of −42.5 dB. The introduction of the thin‐ply laminates caused a shift in the peak of the reflectance curve toward lower frequencies. Highlights: Functionalized absorbed glass fibers were prepared using fiber spreading functional sizing integrated process.A new skin‐core dual‐domain synergistic modulation absorbed structure was developed with thin‐ply laminates and modified honeycomb. Its broadband absorption mechanism was discussed.Desired broadband absorption performance was acquired with thin thickness. [ABSTRACT FROM AUTHOR]

Collagen has shown promising potential in biomedical fields due to its high biocompatibility, abundance of resources, ease of flexible modification, and potential for active targeting. The biomedical capacity is largely influenced by their unique structure and properties. Collagen is typically extracted from tissues and organs that are commonly discarded as waste. The extraction of collagen from agricultural and sideline resources is an environmentally friendly method for utilizing byproducts and generating high-value products. The extraction methods can significantly impact the structure and composition. Collagens can be cross-linked using external reagents or techniques to enhance their strength and meet growing demands. This review will discuss the recent advancements in collagen-based biomaterials for chronic wound healing, bone regeneration, and cornea defect repair, focusing on extraction and modification strategies. We are dedicated to bridging the gap between the pretreatment of collagens in various processes and their specific applications. This will facilitate the scientific design and optimal utilization of collagen-based biomaterials for tissue regeneration. This review provides readers with a comprehensive understanding of the advancements in extraction methods, cross-linking strategies, and the biomedical applications of collagen. [ABSTRACT FROM AUTHOR]

The catalytic gasification of coke with steam was studied by using spent base catalysts as gasification raw material. On the premise of eliminating the influence of internal and external diffusion, the performance of gasification temperature, influent steam, gas mixture ratios and gasification time on the catalytic gasification of coke steam were discussed. The results show that the reaction rate of coke catalytic gasification on the base catalyst is proportional to gasification reaction temperature, and the effect of water vapor diffusion on the coke catalytic gasification can be basically eliminated, when the rate of inlet steam is 2.5 L/min. The conversion rate of coke on the alkaline reagent tends to be stable basically. The gasification reaction time is at least 30 min to achieve a better conversion of coke on the base spent catalyst. The product gas is mainly composed of H2 (approximately 60%). Steam/oxygen gasification reagent is used in the gasification reaction, which could obviously improve the conversion rate of the coke, and meanwhile affect the composition of synthesis gas. The content of H2 and CO in syngas decreased, while the content of CO2 increased. [ABSTRACT FROM AUTHOR]

Methyl-CpG binding protein 2 (MeCP2) has crucial roles in transcriptional regulation and microRNA processing (1-4). Mutations in the MECP2 gene are found in 90% of patients with Rett syndrome, a [...]