Seaweed-based polysaccharides – review of extraction, characterization, and bioplastic application

Krishnan, Lakshmi; Ravi, Nandhini; Kumar Mondal, Anjon; Akter, Farjana; Kumar, Manoj; Ralph, Peter; Kuzhiumparambil, Unnikrishnan

doi:10.1039/d3gc04009g

Green Chem.

2024

DOI: 10.1039/d3gc04009g

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Seaweed-based polysaccharides – review of extraction, characterization, and bioplastic application

Lakshmi Krishnan,

Nandhini Ravi,

Anjon Kumar Mondal

et al.

Abstract: Seaweed biomass is gaining industrial and economic momentum as a renewable feedstock for high-value products, including nutraceuticals, value-added chemicals and bioplastics. These organisms can be sustainably cultivated at an industrial...

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Cited by 3 publications

References 220 publications

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Controlled release of urea using negatively charged polysaccharides

John Kennedy,

Muthuramalingam,

Balasubramanian

et al. 2024

Polymers for Advanced Techs

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The current study aims to synthesize cross‐linked alginate–gum arabic, a polysaccharide biopolymer composite, to evaluate its efficacy for the controlled release of urea. The alginate–gum arabic solution was prepared in a 2:1 ratio, and urea was entrapped in three different amounts: 50 mg for SG1, 100 mg for SG2, and 150 mg for SG3. CaCl2 used as the crosslinker, and the urea‐entrapped alginate–gum arabic hydrogel beads were produced using ionotropic gelation method. Produced beads were underwent physical evaluation to analyze their size, porosity, and swelling behavior. The highest diameter was exhibited in SG3 at 3.60 ± 0.01 mm. Additionally, the highest porosity was observed in SG3 beads, measuring 63.6% ± 0.33%. The release of urea was quantified using the DiacetylMonoxim (DAM)–UV visible spectroscopy method. Further, the characterization of the produced hydrogel beads was analyzed using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analyses (TGA). FTIR revealed the characteristic band at 3770 and 2355 cm−1, indicating the presence of urea entrapped in alginate—gum arabic beads. TGA analyses indicates that the good thermal stability of the produced beads.

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Controlled release of urea using negatively charged polysaccharides

John Kennedy,

Muthuramalingam,

Balasubramanian

et al. 2024

Polymers for Advanced Techs

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Blending induced variations in Poloxamer's/Pluronic's® gelation: Thermodynamic and rheological perspectives

Qutub,

Tatode,

Premchandani

et al. 2024

JCIS Open

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Free and bound phenolic profiles and antioxidant ability of eleven marine macroalgae from the South China Sea

Peng,

Wu,

et al. 2024

Front. Nutr.

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Marine macroalgae are of broad interest because of their abundant bioactive phenolic compounds. However, only a few previous studies have focused on bound phenolic compounds. In this study, there were significant differences in total phenolic content, total phlorotannin content, total flavonoid content, and antioxidant ability in free and bound forms, as well as in their bound-to-free ratios, among 11 marine macroalgal species from the South China Sea. Padina gymnospora had the highest total phenolic content of free fractions, and total phlorotannin content, total flavonoid content, and antioxidant activity of free fractions. Sargassum thunbergii had the highest total phlorotannin content of bound fractions, whereas Sargassum oligocystum had the highest total flavonoid content and total phenolic content of bound fractions. Moreover, 15 phenolic acids, 35 flavonoids, 2 stilbenes, 3 bromophenols, and 3 phlorotannins were characterized and quantified using ultra-high-performance liquid chromatography with Xevo triple quadrupole mass spectrometry, and 42 phenolic compounds were reported in the bound fractions of seaweeds for the first time. Among the species, the number and amount of free and bound phenolic compounds varied greatly and the main components were different. Padina gymnospora had the largest total phenolic number, while Turbinaria ornata showed the highest total phenolic amount. Coutaric acid and diosmetin were dominant in Sargassum polycystum, and hinokiflavone was dominant in Caulerpa lentillifera, and cyanidin was dominant in the other seaweeds. Hierarchical cluster analysis was used to divide the seaweed species into seven groups. This study revealed that Padina gymnospora, Sargassum thunbergii, Turbinaria ornata, and Sargassum oligocystum are promising functional food resources.

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Seaweed-based polysaccharides – review of extraction, characterization, and bioplastic application

Abstract: Seaweed biomass is gaining industrial and economic momentum as a renewable feedstock for high-value products, including nutraceuticals, value-added chemicals and bioplastics. These organisms can be sustainably cultivated at an industrial...

Cited by 3 publications

References 220 publications

Controlled release of urea using negatively charged polysaccharides

Controlled release of urea using negatively charged polysaccharides

Blending induced variations in Poloxamer's/Pluronic's® gelation: Thermodynamic and rheological perspectives

Free and bound phenolic profiles and antioxidant ability of eleven marine macroalgae from the South China Sea

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