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Grain Waste Product as Potential Bio-fiber Resources
Published in Abdullah Al-Mamun, Jonathan Y. Chen, Industrial Applications of Biopolymers and their Environmental Impact, 2020
Microbial production of pectinolytic enzymes is mainly from filamentous fungi, yeasts, and filamentous and non filamentous bacteria. Generally, fungal enzymes are acidic in nature, while alkaline enzymes are produced by bacterial strains. Pectinases can be classified as esterases, eliminative depolymerises, and hydrolytic depolymerises with respect to their role in degradation of pectin [134]. Pectinesterases or pectin methyl hydrolases catalyze hydrolytic removal of the methyl ester group of pectin, forming pectic acid. Depolymerases degrade the α-1,4 glycosidic linkages unit adjacent galacturonic acid residues of pectin. Among the depolymerases, hydrolytic depolymerases act by hydrolysis, whereas eliminative depolymerises act on depolymerisation of pectin by transelimination, which results in galacturonide [135, 136].
Understanding the effects of process parameters in the bioscouring of cotton and their interactions on pectate lyase activity by factorial design analysis
Published in The Journal of The Textile Institute, 2025
Bruna Lyra Colombi, Quesli Martins, Cintia Kopsch Imme, Diofer Barboza Da Silva, José Alexandre Borges Valle, Jürgen Andreaus, Manuel José Lis Arias, Rita De Cássia Siqueira Curto Valle
Pectate lyases (EC 4.2.2.2), which have been found to be the most interesting pectinases for bioscouring, cleave α 1-4-glycosidic linkages in the pectic acid and form 4,5-unsaturated products from the nonreducing end, through trans-elimination reaction (Figure 3) (Andreaus et al., 2019; Linhardt et al., 1986). The digestion of pectins on the surface of cotton fibers by pectate lyase destabilizes the structure, loosens the cellulosic matrix, and releases other non-cellulosic products for subsequent removal by emulsification (Niaz et al., 2011). Here, the inclusion of surfactants in the bioscouring bath is essential to ensure adequate hydrophilicity of the textile article (Tzanov et al., 2001).
Surface treated Pteris vittata L. pinnae powder used as an efficient biosorbent of Pb(II), Cd(II), and Cr(VI) from aqueous solution
Published in International Journal of Phytoremediation, 2018
Smruthi G. Prabhu, Govindan Srinikethan, Smitha Hegde
Calcium chloride (CaCl2) precipitates pectin or pectic acid (Nin-Chuan and Xue-Yi 2012). Pectin is the major component of the middle lamella and a minor component of the primary cell wall of a cell. Pectin of the middle lamella was affected by the action of CaCl2, consequently leading to further disintegration of the plant tissue resulting in smaller particle size. Removal of organic compounds and volatiles by CaCl2 contributed to the modification of topological features of CPV.