A review of paramylon processing routes from microalga biomass to non-derivatized and chemically modified products

Feuzing, Frédérica; Mbakidi, Jean Pierre; Marchal, Luc; Bouquillon, Sandrine; Leroy, Éric

doi:10.1016/j.carbpol.2022.119181

Cited by 17 publications

(13 citation statements)

References 88 publications

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“…The greater the crystallinity, the better the dimensional stability, strength, and heat resistance of the material. Therefore, the study of cellulose crystallinity is very important for the enzymatic digestion of biomass materials (Feuzing et al, 2022 ). Here, we find that the MA + M decreased the CrI of rice straw.…”

Section: Discussionmentioning

confidence: 99%

A Combination of Novel Microecological Agents and Molasses Role in Digestibility and Fermentation of Rice Straw by Facilitating the Ruminal Microbial Colonization

Khan

et al. 2022

Front. Microbiol.

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In this study, we evaluated the effect of microecological agents (MA) combined with molasses (M) on the biodegradation of rice straw in the rumen. Rice straw was pretreated in laboratory polyethylene 25 × 35 cm sterile bags with no additive control (Con), MA, and MA + M for 7, 15, 30, and 45 days, and then the efficacy of MA + M pretreatment was evaluated both in vitro and in vivo. The scanning electron microscopy, X-ray diffraction analysis, and Fourier-transform infrared spectroscopy results showed that the MA or MA + M pretreatment altered the physical and chemical structure of rice straw. Meanwhile, the ruminal microbial attachment on the surface of rice straw was significantly increased after MA+M pretreatment. Furthermore, MA + M not only promoted rice straw fermentation in vitro but also improved digestibility by specifically inducing rumen colonization of Prevotellaceae_UCG-001, Butyrivibrio, and Succinimonas. Altogether, we concluded that microecological agents and molasses could be the best choices as a biological pretreatment for rice straw to enhance its nutritive value as a ruminant's feed.

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Section: Discussionmentioning

confidence: 99%

A Combination of Novel Microecological Agents and Molasses Role in Digestibility and Fermentation of Rice Straw by Facilitating the Ruminal Microbial Colonization

Khan

et al. 2022

Front. Microbiol.

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“…Paramylon was extracted from Euglena gracilis (NIES-48) cultured in a Koren-Hutner medium (pH 3.5, 28 C, $4 d), as previously reported. [15] Two types of paramylon esters, i.e., paramylon mixed esters (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11) and monoesters (12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31), which were prepared via the esterification of paramylon with acylating reagents according to previously reported methods, [1,16] were examined (Figure 1). The carbon numbers (n 1 , n 2 ) of the acyl groups and the DS of each substituent (ds 1 , ds 2 ) of the paramylon esters (1-31) are shown in The total HSP (δ T ), which is expressed using Equation ( 2), is calculated using the HSPs.…”

Section: Methodsmentioning

confidence: 99%

“…[ 1 ] Esterified paramylon may be used to form films via hot‐pressing and fibers via melt‐spinning. [ 4 ] Esterification not only imparts thermoplasticity but also potential compatibilities with other polymer resins and fillers. The thermoplasticities and compatibilities of paramylon esters depend on the chain lengths of the substituents and their degrees of substitution (DSs).…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical estimation of the Hansen solubility parameters of paramylon esters based on the degrees of substitution and chain lengths of their acyl groups

Ata,

Shibakami

2023

Biopolymers

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Paramylon is a natural hydrophilic polysaccharide produced in the pyrenoids of euglenoids, and esterification may render paramylon hydrophobic. Esterification imparts not only thermoplasticity, but also potential compatibilities with other polymer resins and fillers. However, the dependence of the compatibility on the structure of the polymer ester has not yet been systematically studied. To estimate the affinities between paramylon esters and hydrophobic organic solvents/resins, the dependences of their Hansen solubility parameters, which are association indices, on the degrees of substitution and chain lengths of the ester groups were investigated. Experimental and theoretical investigations were conducted using the dissolution and Fedors methods, respectively. Esterification decreased the solubility parameter from 49 (paramylon) to approximately 18 MPa1/2 (paramylon esters), indicating that the potential affinities of paramylon esters for hydrophobic organic solvents/polymers increased. A multiple regression analysis was also performed to investigate the effects of acyl chain length and degree of substitution with acyl groups on the solubility parameter. The solubility parameters of the paramylon derivatives were continuously variable from hydrophilic to ‐phobic. Hence, esterification with various acyl groups may control the hydrophobicities of paramylon esters, enhancing their miscibilities with various hydrophobic organic solvents and resins.

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“…Paramylon is a linear -1,3-glucan, produced by an industrially cultivable microalga (Euglena gracilis). Despite its promising bioactive and mechanical properties, the processing routes to make materials based on this polysaccharide without chemical modification are limited by its low solubility and absence of thermoplasticity, as discussed in detail in a recent review (Feuzing et al, 2022). Indeed, during its biosynthesis as intracellular granules, paramylon chains take a triple helix conformation stabilized by hydrogen bonds (Chuah et al, 1983).…”

Section: ) Introductionmentioning

confidence: 99%

Melt processing of paramylon using a water:ionic liquid mixture as plasticizer

Feuzing

Mbakidi

Pontoire

et al. 2023

Carbohydrate Polymers

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A review of paramylon processing routes from microalga biomass to non-derivatized and chemically modified products

Cited by 17 publications

References 88 publications

A Combination of Novel Microecological Agents and Molasses Role in Digestibility and Fermentation of Rice Straw by Facilitating the Ruminal Microbial Colonization

A Combination of Novel Microecological Agents and Molasses Role in Digestibility and Fermentation of Rice Straw by Facilitating the Ruminal Microbial Colonization

Experimental and theoretical estimation of the Hansen solubility parameters of paramylon esters based on the degrees of substitution and chain lengths of their acyl groups

Melt processing of paramylon using a water:ionic liquid mixture as plasticizer

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