Bisphenol S [OVA]

Bisphenol S (BPS) is an industrial chemical used in the process of polymerization of polycarbonate plastics and epoxy resins and thus can be found in various plastic products and thermal papers. The microbiota disrupting effect of BPS on the community structure of the microbiome has already been reported, but little is known on how BPS affects bacterial activity and function. To analyze these effects, we cultivated the simplified human intestinal microbiota (SIHUMIx) in bioreactors at a concentration of 45 mu M BPS. By determining biomass, growth of SIHUMIx was followed but no differences during BPS exposure were observed. To validate if the membrane composition was affected, fatty acid methyl esters (FAMEs) profiles were compared. Changes in the individual membrane fatty acid composition could not been described; however, the saturation level of the membranes slightly increased during BPS exposure. By applying targeted metabolomics to quantify short-chain fatty acids (SCFA), it was shown that the activity of SIHUMIx was unaffected. Metaproteomics revealed temporal effect on the community structure and function, showing that BPS has minor effects on the structure or functionality of SIHUMIx.

Since the carbon nanotube (CNT) technology was invented in 1991, it has attracted widespread attention from researchers owing to the excellent properties and wide applications. However, the easy agglomeration of CNTs in composite materials severely restricts large-scale applications. The problem of CNT distributing in composites has been solved, since the buckypaper (BP) called 'carbon nanotube film or carbon nanotube paper' was first prepared in 1998. Because porous structure of BP is beneficial to impregnation of matrix materials, preparation methods and applications of BP composites have been widely reported. With porous structure, low density, anticorrosion and excellent properties, BP and its composites could be applied in the electrically conductive fields. This paper is intended to provide a comprehensive review of BPs, including a fundamental understanding of the technology, methods of fabrication, related properties of BPs, various BP composites and their potential applications in aeronautics. The first section presents a brief introduction of BPs, then the descriptions of preparation methods, morphology and related properties of BPs and BP composites are introduced in detail. BP composites, which have been developed for improving related properties of BPs as functional materials, are briefly described. Specially, BP composites are fabricated for conductive applications in aeronautics, such as in deicers, electromagnetic interference (EMI) shielding and lightning striking protection (LSP).