The conversion of end-of-life plastics to useful chemicals can contribute a resource-conserving and environmental-benign society. In this regard, we studied the depolymerization via methanolysis poly(1,2-propylene carbonate) using straightforward metal salts as precatalysts. more detail, in presence catalytic amounts Zn(OAc)2 or NaOAc methanol 1,2-propylene carbonate (generated by ring closing ...

We have synthesized a series of 8-[3H]methoxypsoralens in which methyl and hydrogen are systematically varied at the 4- and 5'-positions. Analysis of the products resulting from the photoaddition of these four psoralens with the nucleic acid poly(dA-dT) reveals that the product distribution depends on the presence or absence of a 4-methyl substituent. Compounds with the 4-methyl group show an o...

Polyadenylate (poly(A)) has the ability to form a parallel duplex with Hoogsteen adenine:adenine base pairs at low pH or in the presence of ammonium ions. In order to evaluate the potential of this structural motif for nucleic acid-based nanodevices, we characterized the effects on duplex stability of substitutions of the ribose sugar with 2'-deoxyribose, 2'-O-methyl-ribose, 2'-deoxy-2'-fluoro-...

Functionalized electrospun nanofibers were integrated into microfluidic channels to serve as on-chip bioseparators. Specifically, poly(vinyl alcohol) (PVA) nanofiber mats were shown to successfully serve as bioseparators for negatively charged nanoparticles. Nanofibers were electrospun onto gold microelectrodes, which were incorporated into poly(methyl methacrylate) (PMMA) microfluidic devices ...

In this work, blends of polyethylene glycol (PEG) and poly(methyl methacrylate) (PMMA) with nanosponge-like porous structure are fabricated by a solution phase separation method, subsequently the nanosponge-porous also applied for high performance triboelectric nanogenerator (TENG). The features controlled varying polymer concentrations PEG/PMMA ratios. A TENG device made PEG-PMMA blend convex-...

In this study, nanocomposite hydrogels of poly(methacrylic acid-co-acrylamide) (Poly(MAA-co-AAm)) containing different weight percent bentonite clay nanoparticles (0, 5, 10, and 15 wt. %) were used to remove methyl violet (MV) dye. FTIR, SEM, TGA, XRD analyze the properties adsorbents. Results showed that successfully distributed in hydrogel system. Bentonite at 10 % gave maximum MV dye adsorpt...