INTRODUCTION Poly(vinyl alcohol) (PVA) is a highly hydrophilic, nontoxic and biocompatible semicrystalline polymer with excellent properties such as strength, water solubility, gas permeability and thermal characteristics. PVA is available in a variety of degrees of hydrolysis (DH) because it is derived from the hydrolysis (or alcoholysis) of poly(vinyl acetate) (PVAc).1–3 The properties of PVA...

Abstract This paper discusses the effect of hydrolytic pretreatments on pulp dissolution in aqueous NaOH–ZnO solvent system. Eight samples were studied. They consisted a never-dried softwood kraft that was hydrolyzed under seven different conditions as well without hydrolysis reference. The pulps evaluated both at macro level molecular based their reactivity with 4-acetamido-2,2,6,6-tetramethyl...

Kitchen wastes containing high amounts of carbohydrates have potential as low-cost substrates for fermentable sugar production. In this study, enzymatic saccharification of kitchen waste was carried out. Response surface methodology (RSM) was applied to optimize the enzymatic saccharification conditions of kitchen waste. This paper presents analysis of RSM in a predictive model of the combined ...

The fishing industry is often targeted as a producer of organic streams with low economic value. Biotechnological approaches can play crucial role in transforming and adding value to these for their further use upcycle. In this study, Atlantic codfish ( Gadus morhua ) frames, were subjected Alcalase hydrolysis, whose optimal conditions first fine-tuned established follows: 56.8 °C, pH 8.35, [Al...

one of the most important forms of preharvest damage to wheat is caused by sunn pests. the insects insert their mouth parts into the immature grain and while injecting their saliva suck the milky juices. flour from damaged wheat results in low baking performance due to the bug proteolytic enzymes’ injected which cause the breakdown of gluten structure in the dough. in the present study three wh...

The efficiency of ammonia removal from fresh source-segregated domestic food waste digestate using biogas as a stripping agent was studied in batch experiments at 35, 55 and 70°C, at gas flow rates of 0.125 and 0.250Lbiogasmin(-1)L(-1)digestate with and without pH adjustment. Higher temperatures and alkaline conditions were required for effective ammonia removal, and at 35°C with or without pH ...

Changes in the foaming properties of whey proteins concentrate (WPC) subjected to enzymatic hydrolysis were studied. Activity and stability of the foam generated from the enzymatic hydrolysis of WPC with two proteases: Trypsin from porcine pancreas (analytical quality) and Alcalase 2.4 L FG (Alcalase) (commercial food grade) were analyzed. WPC solution at concentration 100 mg/mL in 50 mM phosph...

BACKGROUND During cellulosic ethanol production, cellulose hydrolysis is achieved by synergistic action of cellulase enzyme complex consisting of multiple enzymes with different mode of actions. Enzymatic hydrolysis of cellulose is one of the bottlenecks in the commercialization of the process due to low hydrolysis rates and high cost of enzymes. A robust hydrolysis model that can predict hydro...