| Titre : |
Development of bacterial cellulose film coated with mixed colorimetric indicator for tracking the freshness/spoilage of ready-to-cook idli batter |
| Type de document : |
texte imprimé |
| Auteurs : |
P. S. Gaikwad, Auteur ; Chayanika Sarma, Auteur ; Anbarasan Rajan, Auteur ; S. Anandakumar, Auteur ; B. K. Yadav, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 28-37 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Aliments -- Aspect sanitaire
Caractérisation
Cellulose bactérienne
Colorants
Colorimétrie
Couches minces
Couches minces -- Propriétés thermiques
Etiquettes
Système de changement de couleur
|
| Index. décimale : |
667.2 Colorants et pigments |
| Résumé : |
The current study focuses on the fabrication of a mixed chemical colorimetric pH dye-based indicator to monitor the freshness of ready-to-cook (RTC) idli batter stored under ambient conditions. The base of the indicator label was created using Acetobacter xylinum culture for the fabrication of a bacterial cellulose (BC) membrane film, and the characteristics of the developed film were analysed. Scanning electron microscopy identified the presence of a cellulose fibrils network and Fourier Transform–infrared spectroscopy indicated the presence of an amine group at wavenumber 1642 cm−1 on the developed BC film. Differential scanning calorimetry analysis identified the glass transition, onset, melting and end set melt temperatures as −30.3, 42.2, 85.6 and 105.9°C, respectively, and enthalpy as 209.2 Jg−1. The tensile strength of the developed base layer was found to be low at 27.11 ± 0.05 MPa. The developed base layer was coated with mixed colorimetric pH dyes of bromothymol blue and methyl red in a ratio of 2:3. The fabricated mixed colorimetric indicator label reacted as the carbon dioxide concentrations in the headspace increased from 0.15% ± 0.05% to 17.64% ± 0.11% (v/v) for up to 24 hours, and displayed a colour change of yellow for fresh to reddish orange for spoiled RTC idli batter stored under ambient conditions. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Preparation of RTC idli batter - Fabrication of a base layer for the indicator label - Selection and preparation of colorimetric pH dye as an indicator solution - Testing of the developed colour change indicator labels - pH of stored RTC idli batter - Microbial population study of stored RTC idli batter - Statistical analysis
- RESULTS AND DISCUSSION : Characterisation of the developed BC film - Colour change of the indicator label caused by carbon dioxide concentration - pH of stored RTC idli batter - Microbial population of stored RTC idli batter - Image acquisition of colour change indicator labels
- Table 1 : Intermolecular interaction of developed bacterial cellulose film using Fourier Transform–infrared spectroscopy
- Table 2 : Thermal characteristics of developed bacterial cellulose film using differential scanning calorimetry |
| DOI : |
https://doi.org/10.1111/cote.12564 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12564 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37496 |
in COLORATION TECHNOLOGY > Vol. 138, N° 1 (02/2022) . - p. 28-37
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