Chemical Characterization of Non-Saccharidic and Saccharidic Components of Rapeseed Hulls and Sunflower Shells

Abstract

The main compositional characteristics of rapeseed hulls (RH) and sunflower shells (SS) were examined in terms of non-cellulosic components. The non-sugar fractions were analyzed by solid nuclear magnetic resonance (NMR) and pyrolysis-gas-chromatography/mass spectrometry (Pyr-GC-MS). Unlike SS, RH is a non-lignified biomass. The presence of large amounts of catechol and cresol suggested the presence of phytomelanin in both materials. Sugars accounted for 60% of RH and 45% of SS. Pectic compounds were extracted from the holocellulose of RH with ammonium oxalate or with citric acid, with 17% and 31% yield, respectively. A glucuronoxylan was isolated from the holocellulose of SS in basic conditions with 16% yield.

Modeling and optimization of biodegradation of methylene blue by Staphylococcus aureus through a statistical optimization process: a sustainable approach for waste management

“…Changes in the UV-Vis absorption spectrum (e.g., from 200 to 800 nm) were observed for decolorization of MB and compared to the respective control samples. Adsorption on the surface of bacterial cells or biodegradation is primarily responsible for the bacteria assisted de-colorization of dyes (Asad et al 2017). For dye adsorption, the peaks in the UV-Vis absorption spectrum almost diminish in a proportional ratio to each other.…”

Effect of Field Treatment on Microfloral Respiration and Storability of Canola under Different Storage Conditions

“…their respiration [23]. The main composition of rapeseed (canola) hull is non-lignified biomass which contains about 60% holocellulose, 14% protein, and minimum amount of lipids [24]. These main carbohydrate components might be used by the microflora in the tested period, and the microflora did not consume or consumed a negligible amount of lipids which are located inside the hull of the canola seeds.…”