Pre-treatment of corn stover, Cynara cardunculus L. stems and wheat straw by ethanol-water and diluted sulfuric acid: Comparison under different energy input conditions

Xylan Recovery From Dilute Nitric Acid Pretreated Oil Palm Frond Bagasse Using Fractional Factorial Design

“…This result can be further understood by comparing xylan recovery at similar acid concentration (1%) with and without agitation, where higher xylan recovery was obtained when the pretreatment was performed without agitation. This result is supported by the findings of other studies where no agitation was provided to enhance pretreatment (Palamae et al, 2017;Sporck et al, 2017;Vergara et al, 2018).…”

“…This happened because at certain condition when using acid as a pretreatment medium, xylan will be degraded into its monomeric sugar, xylose, which accumulated in the liquid fraction of hydrolysate. Besides, if the process period is prolonged, xylose in hydrolysate will further transform into inhibitors like furfural and acetic acid (Vergara et al, 2018). Thus, the implementation of acid pretreatment very much controlled by the combined severity concept of factors involved in the process depending on the targeted material (Jung and Kim, 2015).…”

Seasonal variation in bioactive properties and phenolic composition of cardoon (Cynara cardunculus var. altilis) bracts

“…scolymus) (Gominho, Curt, Lourenço, Fernández, & Pereira, 2018;Zayed, Serag, & Farag, 2020). It is spread all over the world, except for the Antarctic continent, as a result of its ability to adapt to severe environmental conditions and abiotic stress factors, such as water stress, high salinity levels, temperature extremities, and low fertilized, stony and with variable pH soils (Conceição et al, 2016;Vergara, Ladero, García-Ochoa, & Villar, 2018).…”

Optimized conversion of wheat straw into single cell oils by Yarrowia lipolytica and Lipomyces tetrasporus and synthesis of advanced biofuels

“…More in general, given the complexity of the lignocellulosic matrix, additional degradation products that were not identified are likely present in the hydrolyzate. Different lignin-derived products were found by Vergara et al [31], in wheat straw acid hydrolyzates compared to cardoon. Even if enzymatic hydrolysis used in this work is a milder process than acid hydrolysis, the presence of different lignin fragments cannot be excluded that could exert a different overall inhibitory effect.…”