Ricerc@Sapienza

The effects of an enzymatic treatment with cellulase and mannanase on the properties of marine microalgae
Nannochloropsis sp. were investigated. The combined use of these enzymes synergistically promoted the recovery
of lipids from the microalgae, increasing the extraction yield from 40.8 to over 73%. Untreated and enzymatically
treated microalgae were characterized by chemical analysis and by TGA/DTG, FTIR, XRD and SEM.
Significant changes were observed in the chemical composition and thermal behavior of the microalgae. The

The aim of this research activity was based on the revalorization of Amplodesmos mauritanicus (Diss), an African grass largely presented in the Algerian territory. Diss stems were selected as native botanic material for the extraction of cellulose nanocrystals (CNC). Two different pretreatment steps were carried out to extract CNC from Amplodesmos mauritanicus stems and the following acidic hydrolysis procedure allowed to extract/obtain cellulose nanocrystals in aqueous suspension.

The aim of this study was to assess the effects of commercially available and relatively inexpensive enzyme preparations based on endo 1,4-β-xylanase, pectinase and xyloglucanase on the thermal (TGA), morphological (SEM), chemical (FT-IR) and mechanical (single yarn tensile tests) properties of flax yarns.