Enzyme‐Assisted Extraction of Alginate from Beach Wrack <i>Fucus vesiculosus</i>

Romero, Ana Malvis; Brozio, Felix; Kammler, Sinah; Burkhardt, Christin; Baruth, Leon; Kaltschmitt, Martin; Antranikian, Garabed; Liese, Andreas

doi:10.1002/cite.202200173

Cited by 3 publications

(1 citation statement)

References 38 publications

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“…Currently, the industrial production of alginates is done only through seaweed and efficient biosynthetic pathways for extraction through bacterial sources is still being developed. 18 Other nonconventional methods of alginate extraction such as enzymatic treatments, 19 ultrasound 20 and microwave assisted methods 21 are also reported ( Table 1 ).…”

Section: Introductionmentioning

confidence: 99%

A Review on Hydrophobically Associated Alginates: Approaches and Applications

Akshaya,

Nathanael

2024

ACS Omega

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Alginates are linear anionic polysaccharides, which are well-known for their biocompatible, nontoxic, and biodegradable nature. The polymer consists of alternating units of β-(1 → 4)-linked D-mannuronic acid (M) and α-(1 → 4)-linked L-guluronic acid (G) that have hydroxyl and carboxyl groups as the main functional groups. As a large number of free carboxyl and hydroxyl groups are present in the polymeric chain, the polymer is predominantly hydrophilic. The food and pharmaceutical industries have been the most extensive utilizers of alginates to produce gelling and thickening agents. However, by imparting hydrophobicity to alginates, the range of applications can be widened. Although there are reviews on alginate and its chemical modifications, reviews focusing on hydrophobically associated alginates have not been presented. The commonly used chemical modifications to incorporate hydrophobicity include esterification, Ugi reaction, reductive amination, and graft copolymerization. The hydrophobically modified alginates play an important role in delivery of hydrophobic drugs and pesticides as the modification increases the affinity toward hydrophobic components and helps in their sustained release. Due to their nontoxic and edible nature, they find use in the food industry as emulsion stabilizer to stabilize oil-in-water emulsions and to improve creaming ability. Further, alginate-based materials such as membranes, aerogels, and films are hydrophobically modified to improve their functionality and applicability to water treatment and food packaging. This Review aims to highlight the important chemical modifications and methods that are done to impart hydrophobicity to alginate, and the applications of hydrophobically modified alginates in different sectors ranging from drug delivery to food packaging are discussed.

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Section: Introductionmentioning

confidence: 99%

A Review on Hydrophobically Associated Alginates: Approaches and Applications

Akshaya,

Nathanael

2024

ACS Omega

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Phycochemicals

Elsayed,

Eraky,

Faisal

et al. 2023

Value-Added Products From Algae

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Enzyme-Assisted Extraction of Ulvan from the Green Macroalgae Ulva fenestrata

Malvis Romero,

Picado Morales,

Klose

et al. 2023

Molecules

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Ulvan is a sulfated polysaccharide extracted from green macroalgae with unique structural and compositional properties. Due to its biocompatibility, biodegradability, and film-forming properties, as well as high stability, ulvan has shown promising potential as an ingredient of biopolymer films such as sustainable and readily biodegradable biomaterials that could replace petroleum-based plastics in diverse applications such as packaging. This work investigates the potential of Ulva fenestrata as a source of ulvan. Enzyme-assisted extraction with commercial cellulases (Viscozyme L and Cellulysin) and proteases (Neutrase 0.8L and Flavourzyme) was used for cell wall disruption, and the effect of the extraction time (3, 6, 17, and 20 h) on the ulvan yield and its main characteristics (molecular weight, functional groups, purity, and antioxidant capacity) were investigated. Furthermore, a combined process based on enzymatic and ultrasound extraction was performed. Results showed that higher extraction times led to higher ulvan yields, reaching a maximum of 14.1% dw with Cellulysin after 20 h. The combination of enzymatic and ultrasound-assisted extraction resulted in the highest ulvan extraction (17.9% dw). The relatively high protein content in U. fenestrata (19.8% dw) makes the residual biomass, after ulvan extraction, a potential protein source in food and feed applications.

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Enzyme‐Assisted Extraction of Alginate from Beach Wrack Fucus vesiculosus

Cited by 3 publications

References 38 publications

A Review on Hydrophobically Associated Alginates: Approaches and Applications

A Review on Hydrophobically Associated Alginates: Approaches and Applications

Phycochemicals

Enzyme-Assisted Extraction of Ulvan from the Green Macroalgae Ulva fenestrata

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