Dual Antioxidant Properties and Organic Radical Stabilization in Cellulose Nanocomposite Films Functionalized by In Situ Polymerization of Coniferyl Alcohol.

A new biobased material based on an original strategy using lignin model compounds as natural grafting additive on a nanocellulose surface through in situ polymerization of coniferyl alcohol by the Fenton reaction at two pH values was investigated. The structural and morphological properties of the materials at the nanoscale were characterized by a combination of analytical methods, including Fourier transform infrared spectroscopy, liquid chromatography combined with mass spectrometry, nuclear molecular resonance spectroscopy, electron paramagnetic resonance spectroscopy, water sorption capacity by dynamic vapor sorption, and atomic force microscopy (topography and indentation modulus measurements). Finally, the usage properties, such as antioxidant properties, were evaluated in solution and the nanostructured casted films by radical 2,2'-diphenyl-1-picrylhydrazyl (DPPH) scavenging tests.

Biofilm-Constructing Variants of Paraburkholderia phytofirmans PsJN Outcompete the Wild-Type Form in Free-Living and Static Conditions but Not .

Members of the genus colonize diverse ecological niches. Among the plant-associated strains, PsJN is an endophyte with a broad host range. In a spatially structured environment (unshaken broth cultures), biofilm-constructing specialists of PsJN colonizing the air-liquid interface arose at high frequency.

Syringaresinol: A Renewable and Safer Alternative to Bisphenol A for Epoxy-Amine Resins.

A renewable bisepoxide, SYR-EPO, was prepared from syringaresinol, a naturally occurring bisphenol deriving from sinapic acid, by using a chemo-enzymatic synthetic pathway. Estrogenic activity tests revealed no endocrine disruption for syringaresinol. Its glycidylation afforded SYR-EPO with excellent yield and purity.