Rheological and mechanical properties of alginate gels and films containing different chelators

Hilbig, Jonas; Hartlieb, Katrin; Gibis, Monika; Herrmann, Kurt; Weiß, Jochen

doi:10.1016/j.foodhyd.2019.105487

Cited by 18 publications

(9 citation statements)

References 15 publications

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“…For swelling and in vitro investigation, the composite PVP-SA-HA films were partially crosslinked by calcium chloride [56,57]. PVP-SA-HA films were immersed in 5 wt % solution of CaCl 2 for one minute.…”

Section: Crosslinking Of Composite Pvp-sa-ha Filmsmentioning

confidence: 99%

Composite Polyvinylpyrrolidone–Sodium Alginate—Hydroxyapatite Hydrogel Films for Bone Repair and Wound Dressings Applications

et al. 2021

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Today, the synthesis of biocompatible and bioresorbable composite materials such as “polymer matrix-mineral constituent,” which stimulate the natural growth of living tissues and the restoration of damaged parts of the body, is one of the challenging problems in regenerative medicine. In this study, composite films of bioresorbable polymers of polyvinylpyrrolidone (PVP) and sodium alginate (SA) with hydroxyapatite (HA) were obtained. HA was introduced by two different methods. In one of them, it was synthesized in situ in a solution of polymer mixture, and in another one, it was added ex situ. Phase composition, microstructure, swelling properties and biocompatibility of films were investigated. The crosslinked composite PVP-SA-HA films exhibit hydrogel swelling characteristics, increasing three times in mass after immersion in a saline solution. It was found that composite PVP-SA-HA hydrogel films containing HA synthesized in situ exhibited acute cytotoxicity, associated with the presence of HA synthesis reaction byproducts—ammonia and ammonium nitrate. On the other hand, the films with HA added ex situ promoted the viability of dental pulp stem cells compared to the films containing only a polymer PVP-SA blend. The developed composite hydrogel films are recommended for such applications, such as membranes in osteoplastic surgery and wound dressing.

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Section: Crosslinking Of Composite Pvp-sa-ha Filmsmentioning

confidence: 99%

Composite Polyvinylpyrrolidone–Sodium Alginate—Hydroxyapatite Hydrogel Films for Bone Repair and Wound Dressings Applications

et al. 2021

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“…A characteristic property of alginate dredges is a high dissolution temperature of up to 95 °C, which does not affect its viscosity, but is not effective in economic terms and increases the cost of production based on it. The best swelling effect for alginates occurs when the ratio of sodium alginate: water = 1:8, with a process time of 55 ± 5 min [15].…”

Section: Research Resultsmentioning

confidence: 99%

“…Sodium alginate (AlgNa) obtained by alkaline extraction of brown algae and pectin substances, the main source of which are fruits and vegetables, is such structure-forming agents that improve the consumer properties of food products. Sodium alginate has well-known therapeutic and prophylactic properties, which led to its widespread use in medicine, biotechnology, and various branches of the food industry [15].…”

Section: Research Of Existing Solutions To the Problemmentioning

confidence: 99%

“…The formation of a jelly structure in the zones of ionotropic gelation in alginate solutions occurs with the participation of ions of divalent metals through the interaction of molecules with each other [15]. The jelly formation of alginates is influenced by the concentration of alginate, its chemical composition and molecular weight; the ratio between the substances participating in the jelly formation process.…”

Section: Research Of Existing Solutions To the Problemmentioning

confidence: 99%

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Formation of consumer preferences in the fish restaurants menu based on sensory characteristics

Nikitchina

Manoli

Miroshnichenko

et al. 2021

TAPR

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The object of research is fish culinary products in the jelly pouring of the menu of conceptual restaurants. The subject of research is the consumer characteristics of gelling fish broth for culinary products based on sensory characteristics. The study used methods for determining the consumer characteristics of fish culinary products based on physical, chemical, aesthetic and sensory analysis. Methods for the preliminary preparation of hydrocolloids as structure-forming agents for the preparation of gelling culinary products with the study of the parameters of the jelly formation process are proposed. The developed ingredient composition of fish culinary products based on low methoxylated pectin and sodium alginate improves the consumer characteristics of the finished dish. This ensures the implementation of strategic decisions in the food industry through the introduction of innovative technologies and the release of products with new consumer and functional properties. It is the new ingredient composition of the fish culinary products in the pouring that opens the priorities in the creation of the wellness products industry with the aim of improving the health of consumers. The active elements of algae are absorbed almost completely through a chemical composition close to that of human plasma. As a result, algae are able to compensate for the lack of elements and contribute to the normalization of metabolism. The use of low-esterified pectin is due to its structure-forming, therapeutic and prophylactic, sorption, antibacterial properties, which are an alternative to antibiotics and synthetic preservatives to prevent bacterial spoilage. The use of dietary supplements based on sodium alginate and pectin in food products provide an adjustable texture with new rheological and functional properties, which have a positive effect on the commodity performance of finished products for promotion on the market of healthy food restaurants. On the basis of the sensory indicator, rational parameters of the recipe of fish culinary products in jelly pouring were determined to obtain a transparent, stable, homogeneous elastic consistency, which will expand the range of the wellness menu of restaurants of the Wellness concept.

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“…Interestingly, the alginates isolated from C. sinuosa were richer in guluronic than mannuronic acid, indicating that these alginates can form strong and heat-stable hydrogels. This is because the guluronate blocks allow a high degree of divalent ion coordination, which is essential for enhancing gelling properties [45]. However, it must be noted that the structure of the alginate extracted from the Lebanese C. sinuosa is slightly different from alginates present in brown algae of other species in the same region.…”

Section: Discussionmentioning

confidence: 99%

Fucoidan and Alginate from the Brown Algae Colpomenia sinuosa and Their Combination with Vitamin C Trigger Apoptosis in Colon Cancer

et al. 2022

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Brown seaweeds are producers of bioactive molecules which are known to inhibit oncogenic growth. Here, we investigated the antioxidant, cytotoxic, and apoptotic effects of two polysaccharides from the brown algae Colpomenia sinuosa, namely fucoidan and alginate, in a panel of cancer cell lines and evaluated their effects when combined with vitamin C. Fucoidan and alginate were isolated from brown algae and characterized by HPLC, FTIR, and NMR spectroscopy. The results indicated that highly sulfated fucoidans had higher antioxidant and cytotoxic effects than alginate. Human colon cancer cells were the most sensitive to the algal treatments, with fucoidan having an IC50 value (618.9 µg/mL−1) lower than that of alginate (690 µg/mL−1). The production of reactive oxygen species was increased upon treatment of HCT-116 cells with fucoidan and alginate, which suggest that these compounds may trigger cell death via oxidative damage. The combination of fucoidan with vitamin C showed enhanced effects compared to treatment with fucoidan alone, as evidenced by the significant inhibitory effects on HCT-116 colon cancer cell viability. The combination of the algal polysaccharides with vitamin C caused enhanced degeneration in the nuclei of cells, as evidenced by DAPI staining and increased the subG1 population, suggesting the induction of cell death. Together, these results suggest that fucoidan and alginate from the brown algae C. sinuosa are promising anticancer compounds, particularly when used in combination with vitamin C.

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Rheological and mechanical properties of alginate gels and films containing different chelators

Cited by 18 publications

References 15 publications

Composite Polyvinylpyrrolidone–Sodium Alginate—Hydroxyapatite Hydrogel Films for Bone Repair and Wound Dressings Applications

Composite Polyvinylpyrrolidone–Sodium Alginate—Hydroxyapatite Hydrogel Films for Bone Repair and Wound Dressings Applications

Formation of consumer preferences in the fish restaurants menu based on sensory characteristics

Fucoidan and Alginate from the Brown Algae Colpomenia sinuosa and Their Combination with Vitamin C Trigger Apoptosis in Colon Cancer

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