A green bioreductive approach with Cacumen Platycladi (CP) extract was adopted to fabricate bimetallic Au− Pd/TiO 2 catalysts for solvent-free oxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) with molar oxygen at atmospheric pressure. The Au−Pd nanoparticles (NPs) before being immobilized onto TiO 2 were determined by transmission electron microscopy. And, the catalysts were further analyzed by X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis, etc. Effects of Au/Pd molar ratio, preparation conditions, and reaction conditions on the catalytic activity of Au− Pd/TiO 2 were investigated. And, the Au−Pd/TiO 2 catalyst without calcination that was prepared at 90 °C from the Au−Pd NPs with Au/Pd molar ratio of 2:1 exhibited excellent catalytic performance. With the catalyst, BzOH conversion of 74.2% and selectivity to BzH 95.8% were attained at the reaction temperature of 90 °C with an oxygen flow rate of 90 mL/min. Meanwhile, the recycling tests showed that, after seven recycles, the catalyst still remained with high conversion and selectivity. Therefore, the catalyst had excellent durability and reusability and good prospects for industrial application.
Circular RNAs (circRNAs) are a new class of RNAs, and many studies have identified thousands of circRNAs in tumor cells. Fibronectin type III domain‐containing protein 3B (FNDC3B) circular RNA (circFNDC3B, circBase ID: hsa_circ_0006156) circularizes with exons 5 and 6. Gibson Assembly DNA technology was used to construct a circFNDC3B expression vector without a splice site and restriction enzyme site. We showed that circFNDC3B increased migration and invasion in gastric cancer (GC). Ectopic expression of circFNDC3B reduced the level of E‐cadherin protein to promote the epithelial–mesenchymal transition in GC. RNA immunoprecipitation assays and RNA pull‐down assays confirmed that circFNC3B increased CD44 expression, which was associated with cell adhesion, via the formation of a ternary complex of circFNDC3B‐IGF2BP3‐CD44 mRNA. These results indicated that circFNDC3B was associated with the degree of malignancy to highlight the specific characteristics of cell invasion.
Herein, we reported the green synthesis
of Ag–Pd alloy nanoparticles
(NPs) using the aqueous extract of the Cacumen platycladi leaves as well as their application as catalyst for hydrogenation
of 1,3-butadiene. The biosynthetic NPs were characterized to confirm
the nature of alloy by UV–vis spectroscopy, X-ray diffraction
(XRD), transmission electron microscopy (TEM), and energy dispersive
X-ray spectroscopy (EDX). The possible functional groups responsible
for the reduction and protection of NPs were identified through Fourier
transform infrared spectroscopy (FTIR). The results revealed that
biomolecules like saccharides, polyphenols, or carbonyl compounds
were related to the reduction process, and the (NH)CO groups
were responsible for the stabilization of the NPs. Furthermore, the
as-formed Ag–Pd bimetallic-supported catalysts especially Ag1Pd3/γ-Al2O3 was found
to possess excellent catalytic performance toward hydrogenation of
1,3-butadiene. A butene yield of 84.9% was obtained, which was remarkably
enhanced when compared with monometallic counterparts. Moreover, the
activity of it maintained stability within 12 h of durable experiments.
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