Novel and practical low-temperature 3D printing technology composed of a machine optimized parameters was successfully developed. Under environment 0–−20 °C, poly (vinyl alcohol) (PVA) matrix hydrogels including PVA-sodium lignosulphonate (PVA-LS) hydrogel carboxymethylcellulose (PVA-CMC) exhibited specific rheology properties, building theoretical printable bases. The self-made realized machin...

One of the promising applications nickel hydroxide is electrochemical electrochromic devices. To significantly improve characteristics, role polyvinyl alcohol (PVA) in synthesis and structure composite Ni(OH)2-PVA films was investigated by studying effect its concentration (30, 40, 50 g/l) polymerization degree (17-99, 24-99, 30-99 types). Adhesion visually, properties – cyclic voltammetry with...

Coffee is one of the most valued agricultural products regarding its high commercialization rate. During production coffee beans, pulp obtained as main byproducts with a cellulose content more than 30% dry weight. This research focused on value-added potential fiber reinforcement in composite materials. The nanocellulose (NCP) from (CP) was prepared and subsequently used filler to reinforce pol...

Abstract Chemical modification of poly(vinyl alcohol) (PVA) with different monomers is a convention method for the development its properties. In this study, new multifunctional membranes (PVA-A) 1–3 , (PVA-P) (PVA-AG) and (PVA-PG) were designed synthesized by reaction PVA heterocyclic compounds [ N ʹ-bi- α -azido succinimide (A), -phthalimido- (P)] using glutaraldehyde (G) as cross-linker, res...

An axenic culture of a polyvinyl alcohol (PVA)-degrading symbiont, Pseudomonas sp. strain VM15C, was established on PVA with a crude preparation of the growth factor (factor A) produced by the symbiotic partner Pseudomonas putida VM15A. An increase of factor A in the culture medium enhanced the cell-associated PVA oxidase activity as well as the growth rate, but decreased production of extracel...

Production of polyvinly alcohol (PVA) oxidase by Pseudomonas sp. strain VM15C, a PVA degrader of a symbiotic PVA-utilizing mixed culture, was examined in various cultures. Despite the absence of PVA in the culture in nutrient broth, VM15C showed approximately the same productivity of PVA oxidase activity as that in the culture with PVA as the sole carbon source, whereas the productivity in the ...

A polyvinyl alcohol (PVA) oxidase-deficient mutant of Pseudomonas sp. strain VM15C, strain ND1, was shown to possess PVA dehydrogenase, in which pyrroloquinoline quinone (PQQ) functions as a coenzyme. The mutant grew on PVA and required PQQ for utilization of PVA as an essential growth factor. Incubation of the membrane fraction of the mutant with PVA caused cytochrome reduction of the fraction...

A novel method for the preparation of composites based on poly(vinyl alcohol) (PVA) and microand nano-fibrillated cellulose (M/NFC) is reported. The addition of crosslinking HEMA monomers and a photo-initiator enabled the formation of an interpenetrated polymer network that displayed enhanced interfacial adhesion and dispersion of (M/ NFC) in the matrix. Photo-crosslinked PVA/(M/ NFC)/polyHEMA ...

A novel enzyme, pyrroloquinoline quinone (PQQ)-dependent polyvinyl alcohol (PVA) dehydrogenase, was found in and partially purified from the membrane fraction of a PVA-degrading symbiont, Pseudomonas sp. strain VM15C. The enzyme required PQQ for PVA dehydrogenation with phenazine methosulfate, phenazine ethosulfate, and 2,6-dichlorophenolindophenol as electron acceptors and did not show PVA oxi...

Polyvinyl alcohol (PVA) is a biocompatible, transparent hydrogel with physical strength that makes it promising as a material for an artificial cornea. In our previous study, type I collagen was immobilized onto PVA (PVA-COL) as a possible artificial cornea scaffold that can sustain a functional corneal epithelium. The cellular adhesiveness of PVA in vitro was improved by collagen immobilizatio...