Sol-gel transition of a mixture of gelatin and κ-carrageenan

Takayanagi, Shigeyo; Ohno, Takashi; Okawa, Yusuke; Shiba, Fumiyuki; Kobayashi, Hiroyuki; Kawamura, Fujiko

doi:10.1080/13682199.2000.11784361

Cited by 3 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These measurements are consistent with the findings of Takayanagi et al, 35 where they investigated the effect of concentration and pH on sol–gel transitions of gelatin. The specific rotation was studied over the pH range of pH 3–9, with the greatest optical rotation observed close to the isoelectric point at pH 5.…”

Section: Resultssupporting

confidence: 92%

“…However, for the samples whose pH values were adjusted close to the isoelectric point, the positive and negative charges are balanced, facilitating helix formation at higher temperatures. 35 These polarimetry studies give an insight into the morphology of the gelatin materials at each pH value and support the hypotheses proposed for the changes observed in the material mechanical properties.…”

Section: Polarimetrysupporting

confidence: 75%

“…The system needs to be cooled to lower temperatures to allow molecules to aggregate. However, for the samples whose pH values were adjusted close to the isoelectric point, the positive and negative charges are balanced, facilitating helix formation at higher temperatures 35 …”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of the influence of pH on the properties and morphology of gelatin hydrogels

Goudie

McCreath

Parkinson

et al. 2023

Journal of Polymer Science

View full text Add to dashboard Cite

The behavior of gelatin hydrogels is influenced by the charges located on the amino acid side chains throughout the gelatin molecules. The presence and distribution of ionisable side chains influences the surface activity of gelatin and ultimately determines the material properties. Herein, we report the influence of pH on mechanical properties as studied by texture analysis supported by data from polarimetry, zeta potential, pH titrations and NMR experiments. When adjusted to more extreme pH values (pH 2 and 12), softer gelatin blocks were observed. However, at pH values close to the isoelectric point (pH 5–10), the material is firmer. This behavior is related to the helical content. At pH 2 and pH 12 the surface of the gelatin carries a net charge, positive and negative, respectively, that inhibits the formation of tight helices and lowers the physical crosslink network density. Chemical shift perturbations were observed for the acidic amino acids glutamic and aspartic acid, under acidic pH, where their peaks shifted to higher ppm. Intense amide signals were observed at acidic pH but diminished with increasing pH. This was due to an increase in the rate of chemical exchange between the solvent and peptide amide protons as the pH increases.

show abstract

Section: Resultssupporting

confidence: 92%

Section: Polarimetrysupporting

confidence: 75%

See 1 more Smart Citation

Investigation of the influence of pH on the properties and morphology of gelatin hydrogels

Goudie

McCreath

Parkinson

et al. 2023

Journal of Polymer Science

View full text Add to dashboard Cite

show abstract

Optimizing the component ratio to develop the biocomposites with carrageenan/collagen/allopurinol for the controlled drug release

Nguyen

Manh

Hoàng

et al. 2022

Journal of Drug Delivery Science and Technology

View full text Add to dashboard Cite

Comparing the viscoelastic properties of gelatin and different concentrations of kappa-carrageenan mixtures for additive manufacturing applications

Warner

Norton

Mills

2019

Journal of Food Engineering

View full text Add to dashboard Cite

Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

show abstract

Sol-gel transition of a mixture of gelatin and κ-carrageenan

Cited by 3 publications

References 2 publications

Investigation of the influence of pH on the properties and morphology of gelatin hydrogels

Investigation of the influence of pH on the properties and morphology of gelatin hydrogels

Optimizing the component ratio to develop the biocomposites with carrageenan/collagen/allopurinol for the controlled drug release

Comparing the viscoelastic properties of gelatin and different concentrations of kappa-carrageenan mixtures for additive manufacturing applications

Contact Info

Product

Resources

About