Physicochemical properties of edible alginate film from Malaysian  Sargassum polycystum  C. Agardh

Kok, Jamie Mei-Lin; Wong, Ching-Lee

doi:10.1016/j.scp.2018.07.001

Cited by 20 publications

(19 citation statements)

References 24 publications

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“…The viscosities of neat AG solution (2% (w/v)) as the control and the solutions of different batches of alginate/ starch (AG/S) blends (600 ml) were determined using an LVDV-I Prime viscometer (Brookfield) with a spindle no. 64 using a mixing speed of 100 rpm at 25 C. 32 The tests were run in triplicate for each solution, and average values were calculated.…”

Section: Determination Of Viscositymentioning

confidence: 99%

Encapsulation of Rhodopseudomonas palustrisKTSSR54 using beads from alginate/starch blends

Rohman

Kaewtatip

Kantachote

et al. 2020

J of Applied Polymer Sci

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Alginate beads are a promising carrier for biofertilizer delivery, but still possess drawbacks of low mechanical strength and bead shrinkage that result in poor appearance and inadequate cell protection. Blending alginate with starch was proposed as a solution to these problems, and here alginate hydrogels were prepared using a 2% (w/v) alginate dispersion blended with varying contents of gelatinized starch (0–5% w/v). The interaction produced a viscosity synergism that increased the complexity of the matrix network in the alginate/starch blends, producing a more suitable matrix for cell entrapment. Hydrogen bonding between alginate and starch influenced the viscosity of the various solutions in a way that was consistent with the FTIR spectra. The starch content also helped beads retain their spherical shape after drying. The starch supported the entrapment of bacterial cells (plant growth‐promoting bacterium Rhodopseudomonas palustris KTSSR54 as biofertilizer) in the matrix, which reduced cell loss. The highest entrapment efficiency of 70.83% was obtained at 4% (w/v) starch, while the entrapment efficiency of control beads was 50.56%. Overall, the appropriate content of starch mixed with alginate is conducive to changes in the morphology of microcapsules and increases in the amount of biological encapsulation.

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Section: Determination Of Viscositymentioning

confidence: 99%

Encapsulation of Rhodopseudomonas palustrisKTSSR54 using beads from alginate/starch blends

Rohman

Kaewtatip

Kantachote

et al. 2020

J of Applied Polymer Sci

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“…The 1 H NMR spectrum of E 3 representing the uronic acid sequence is depicted in Figure 5 . The peak at 5.03 ppm was associated with H 1 of α-l-guluronic acid [ 106 , 108 ]. The presence of M units in the extract was indicated through an intense peak at 4.62 ppm, which was assigned to β-d-mannuronic acid residues [ 106 , 108 ].…”

Section: Resultsmentioning

confidence: 99%

Characterization and Bioactivity of Polysaccharides Separated through a (Sequential) Biorefinery Process from Fucus spiralis Brown Macroalgae

et al. 2022

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Marine macroalgae biomass is a valuable renewable resource that can be used for the development of bioeconomy through the valorisation of valuable compounds. The aim of the current study is separate macroalgal polysaccharides with bioactive properties from brown macroalgae Fucus spiralis based on a designed biocascading biorefinery approach. Thus, we applied an integrated processing method for the separation of fucoidan and alginate, in addition to characterization through IR spectroscopy and 1H NMR. The bioactivity potential (antioxidant activity using superoxide anion and DPPH radical scavenging analysis) of the two polysaccharides was evaluated, together with DNA binding studies performed though voltametric techniques and electronic spectroscopy titration. In terms of results, functional groups S=O (1226 cm−1), N=S=O (1136 cm−1) and C-O-SO3 (1024 cm−1), which are characteristic of fucoidan, were identified in the first polysaccharidic extract, whereas guluronic units (G) (1017 cm−1) and mannuronic units (M) (872 and 812 cm−1) confirmed the separation of alginate. The DNA binding studies of the isolated polysaccharides revealed an electrostatic and an intercalation interaction of DNA with fucoidan and alginate, respectively. Both antioxidant activity assays revealed improved antioxidant activity for both fucoidan and alginate compared to the standard α-tocopherol.

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“…Hydrocolloid was prepared by dissolving SA (15–75 g) and HA (75–15 g) in 100 ml deionized water under control heating (60°C, 300 rpm) and continuous stirring for 30 min. The range of film‐forming materials was selected based on previous studies according to Tran, Paul, Minh, Penta, and Quan (2020), Kok and Wong (2018), Gheorghita, Gutt, and Amariei (2020), and a series of trial experiments. The two solutions are mixed in a certain proportion to obtain the mixed membrane solution, which is stirred uniformly and poured into the plastic plates (14.5 × 2.0 cm) mold, the composite gel was obtained by freeze–thaw treatment 0–4 cycle (freezing at −18°C for 24 hr and thawing at room temperature for 12 hr for one freeze–thaw cycle).…”

Section: Methodsmentioning

confidence: 99%

Freeze–thaw enhanced stability and mechanical strength of polysaccharide‐based sodium alginate/hyaluronic acid films

Zhang

Han³

et al. 2021

Journal of Food Safety

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An edible polysaccharide film with high tensile strength and biodegradability was prepared by freeze-thaw treatment with sodium alginate (SA) and hyaluronic acid (HA) and cross-linking with calcium lactate. The SA/HA ratio, the calcium concentration, the number of freeze-thaw cycles, and the calcification time all have significant effects on the tensile strength of SA/HA films. An increase in tensile strength was obtained due to the reaction of 3% calcium lactate with 60% SA. Compared with the control group, the tensile strength of the SA/HA films developed in this study increased by 214% from 3.188 to 10.02 MPa. The compatibility of films was evaluated by Fourier transform infrared spectroscopy; the absorption peaks of SA and sodium hyaluronate had shifted to a wavelength of 3,403 $ 3,411 cm À1 after freeze-thaw treatment, and a strong interaction occurred at a wavelength of 1,328 cm À1 . In addition, the swelling and solubility of the SA/HA film decreased by half during the freeze-thaw period. Further, scanning electron microscopy showed that the cross sections of the films were uniform and compact after two freeze-thaw treatments. SA/HA films that exhibited increased tensile strength and that had the potential to overcome the poor water vapor barrier problems traditionally experienced with these films were developed in this study.

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Physicochemical properties of edible alginate film from Malaysian Sargassum polycystum C. Agardh

Cited by 20 publications

References 24 publications

Encapsulation of Rhodopseudomonas palustrisKTSSR54 using beads from alginate/starch blends

Encapsulation of Rhodopseudomonas palustrisKTSSR54 using beads from alginate/starch blends

Characterization and Bioactivity of Polysaccharides Separated through a (Sequential) Biorefinery Process from Fucus spiralis Brown Macroalgae

Freeze–thaw enhanced stability and mechanical strength of polysaccharide‐based sodium alginate/hyaluronic acid films

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