Besides, the locomotion of the microbot was demonstrated by a wind-driven TENG, and a good concealment performance was achieved under infrared camera and decibel meter. The proposed aquatic TENG-Bot not only shows the potential of converting environmental energy into actuation force for microbots but also reveals advantages in optical, sonic, and infrared concealment.Nickel oxide (NiO x ) is a promising hole-transporting material for perovskite light-emitting diodes (PeLEDs) because of its low cost, excellent stability, and simple fabrication process. However, the electroluminescence efficiencies of NiO x -based PeLEDs are greatly limited by inefficient hole injection and exciton quenching at the NiO x -perovskite interfaces. Here, a novel interfacial engineering method with sodium dodecyl sulfate-oxygen plasma (SDS-OP) is demonstrated to simultaneously overcome the aforementioned issues. Experimental results reveal that a short OP treatment on the top of the SDS-coated NiO x significantly deepens the NiO x work function (from 4.23 to 4.85 eV) because of the formation of a large surface dipole, allowing for efficient hole injection. learn more Moreover, the SDS-OP layer passivates the electronic surface trap states of perovskite films and suppresses the exciton quenching by NiO x . These improvements inhibit the nonradiative decays at the NiO x -perovskite interface. As a result, the external quantum efficiency of CsPbBr3 LEDs is increased from 0.052 to 2.5%; that of FAPbBr3 nanocrystals LEDs is increased from 5.6 to 7.6%.Peptide-based biomimetic nanostructures and metal-organic coordination networks on surfaces are two promising classes of hybrid materials which have been explored recently. However, despite the great versatility and structural variability of natural and synthetic peptides, the two directions have so far not been merged in fabrication of metal-organic coordination networks using peptides as building blocks. Here we demonstrate that cyclic peptides can be used as ligands to form highly ordered, two-dimensional, peptide-based metal-organic coordination networks. The networks are formed on a Au(111) surface through coadsorption of cyclic dialanine with Cu-adatoms under Ultra-High Vacuum (UHV) conditions. Scanning Tunneling Microscopy (STM) in combination with X-ray Photoelectron spectroscopy (XPS) has been utilized to characterize the network structures at submolecular resolution and expound the chemical changes involved in network coordination. The networks involve a motif of three cyclic dialanine molecules coordinating to a central Cu-adatom. Interestingly the networks expose pores functionalized by the side chain of the cyclic peptide, suggesting a general method to form functionalized porous metal-organic networks on surfaces.We study silver nanowires as a model for the mechanical effects of ultrasonication. Their bending is caused by the outward push of shock waves against the inertia and fluid resistance. The structural analyses of a large number of cases reveal the principles of the mechanical effects on the freely suspended colloidal nanostructures. In addition to providing knowledge of the sonication effects, we believe that understanding would help to exploit sonication for nanoscale mechanical manipulation.The amination of aryl halides has become one of the most commonly practiced C-N bond-forming reactions in pharmaceutical and laboratory syntheses. The widespread use of strong or poorly soluble inorganic bases for amine activation nevertheless complicates the compatibility of this important reaction class with sensitive substrates as well as applications in flow and automated synthesis, to name a few. We report a palladium-catalyzed C-N coupling using Et3N as a weak, soluble base, which allows a broad substrate scope that includes bromo- and chloro(hetero)arenes, primary anilines, secondary amines, and amide type nucleophiles together with tolerance for a range of base-sensitive functional groups. Mechanistic data have established a unique pathway for these reactions in which water serves multiple beneficial roles. In particular, ionization of a neutral catalytic intermediate via halide displacement by H2O generates, after proton loss, a coordinatively unsaturated Pd-OH species that can bind amine substrate triggering intramolecular N-H heterolysis. This water-assisted pathway operates efficiently with even weak terminal bases, such as Et3N. The use of a simple, commercially available ligand, PAd3, is key to this water-assisted mechanism by promoting coordinative unsaturation in catalytic intermediates responsible for the heterolytic activation of strong element-hydrogen bonds, which enables broad compatibility of carbon-heteroatom cross-coupling reactions with sensitive substrates and functionality.
The study aims to present an assessment of the effect on the composition of fatty acids of a modification of buckwheat sprouts Fagopyrum esculentum Moench by the addition of the probiotic strain of yeast Saccharomyces cerevisiae var. boulardii. The study is innovative.
Seeds, control and modified buckwheat sprouts lyophilisates constituted the research material. Fat analyses were performed using the standards methods. However, the determination of fatty acids was carried out following the AOCS Ce 2-66 methodology.
The results indicated that the germination process increased the total fat content of the sprouts as well as changed the fatty acid profile. Statistically significant differences were found in the content of palmitic, arachidic, ginkgolic, oleic, eicosenoic and linoleic acids between the control and probiotic-rich sprouts. It was also found that the quality indicators of buckwheat lipids, such as atherogenic and thrombogenic, are optimal in terms of nutritional value.
Buckwheat sprouts modified by adding probiotic yeast might be a new functional product that can be used as part of a diet that reduces the risk of cardiovascular disease.
Buckwheat sprouts modified by adding probiotic yeast might be a new functional product that can be used as part of a diet that reduces the risk of cardiovascular disease.learn more
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