X-ray Phase Contrast Imaging (XPCI) techniques have been receiving increasing attention in the last decade due to the contrast improvement that they offer for weakly absorbing materials such as polymers or biological soft tissues. However, their use in industrial non-destructive testing and evaluation has been up to now marginal, on one hand due to the technical limitations of the initial exper...

At present, a series of challenges are impeding large-scale application high temperature radar absorbing coatings (RACs), such as complex preparation raw material and complicated technology processing. In this paper, we designed experimentally demonstrated high-temperature metamaterial RAC (MRAC) with strong absorption thin thickness, which is composite coating layer metamaterial. To avoid mate...

Ultra-broadband sound absorption with periodic gradient impedance matching is of great concern in the research acoustic materials. This study investigates composite metamaterials comprising micro-perforated plates (MPPs) and subsequent Fabry–Pérot(FP) channels. Based on theory, ultra-broadband has been realized through a design 36 channels whose thickness only 50 mm. Also, average coefficient 8...

Microwave-absorbing materials are widely utilized in military and civilian applications. Moreover, their environmental potential to refine electromagnetic pollution has promoted importance. An ideal conjugated organic polymer for use as a microwave-absorbing material should possess high porosity, low density, long backbone, narrow energy band gap, proper conductive relaxation loss, vast specifi...

Understanding shockwave-induced physical and chemical changes of impact-absorbing materials is an important step toward the rational design of materials that mitigate the damage. In this work, we report a series of network-forming ionic liquids (NILs) that possess an intriguing shockwave absorption property upon laser-induced shockwave. Microstructure analysis by X-ray scattering suggests nano-...

A synthetic aza-cholestane amine was found to be rapidly lethal to Saccharomyces cerevisiae. Lethal action was prevented by pretreating cells with 10m uranyl nitrate. Sublethal concentrations of the steroid prevented the uptake of glucose and alanine. This demonstrated one means by which the steroid affected cell permeability, limiting the growth of the organism. Decreases in viability were rel...

Background: The Mars Express and Mars Reconnaissance Orbiter spacecraft both carry radar sounder systems (MARSIS and SHARAD). These instruments transmit a radar signal with wavelength of meters to tens of meters, and penetrate to depths of several km in typical dry crustal rocks. Sounders, however, provide relatively coarse horizontal resolution (1-10 km), and cannot reveal detail of the near-s...