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    Development of ternary polymeric film based on modified mango seed kernel starch, carboxymethyl cellulose, and gum acacia to extend the shelf-life of bun-bread
    (Elsevier, 2024) Das Adhikary, Nibedita; Bains, Aarti; Tosif, Mansuri M.; Chawla, Prince; Ali, Nemat; Ansari, Mushtaq Ahmad; Dhull, Sanju Bala
    Non -conventional starch sources have attracted substantial attention due to their preferred physicochemical and mechanical properties similar to conventional sources. This study aimed to enhance the mechanical properties of mango seed kernel starch (MSKS) based films reinforced with carboxymethyl cellulose (CMC) and gum acacia (GA). Physical modification of MSKS was carried out using microwave -assisted at 180 W for 1 min. SEM results confirmed the oval and irregular shape of starch. The particle size of native starch (NS) (754.9 +/- 20.4 nm) was higher compared to modified starch (MS) 336.6 +/- 88.9 nm with a surface charge of -24.80 +/- 3.92 to -34.87 +/- 3.92 mV, respectively. Several functional groups including hydroxyl (O - H) and carboxyl (C - H) were confirmed in NS and MS. Different ratios of the MS, NS, CMC, and GA were used for the fabrication of films. Results revealed the higher tensile strength of M/C/G-1 (57.45 +/- 0.05 nm) and M/C/G-2 (50.77 +/- 0.58), compared to control C-4 (100 % native starch) (4.82 +/- 0.04) respectively. The ternary complex provided excellent permeability against moisture and the film with a higher starch concentration confirmed the uniform thickness (0.09 - 0.10 mm). Furthermore, selected films (M/C/G-1 and M/C/G-2) reduced the microbial growth and weight loss of the bun compared to the control (C-4) film. Thus, the ternary complex maintained the freshness of the bun -bread for 14 days. It can be potentially used as a cost-effective and eco-friendly packaging material for food applications.
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    Öğe
    Green hydrothermal approach for the synthesis of carbon quantum dots from waste tea bags for acrylamide detection in drinking water: A fluorescence assay validated by HPLC-PDA analysis
    (Elsevier, 2025) Sharma, Nikhil; Thakur, Sweezee; Bains, Aarti; Goksen, Gulden; Ali, Nemat; Ansari, Mushtaq Ahmad; Kopsacheili, Anna
    The study focused on converting tea bag waste into strong fluorescence carbon quantum dots (TBW-CQDs) for the detection of acrylamide in drinking water, antimicrobial activity, and photocatalytic degradation. The TBWCQDs exhibited blue luminescence and maximum absorbance at 287 nm under UV light and distinctive fluorescence emission and excitation wavelengths at 425 nm and 287 nm, respectively. TBW-CQDs revealed a particle size of 8.12 +/- 0.06 nm with a spherical morphology followed by an abundance of 59.29 % carbon and 39.82 % oxygen. For acrylamide extraction from water, the QuEChERS method was established, which exhibited a recovery rate of 97 to 99 %. The fluorescence-based sensor exhibited a low limit of detection of 0.35376 ppm, which was validated by HPLC-PDA (LOD 0.300688 ppm). TBW-CQDs degraded 90.62 % of indigo carmine and 93.19 % of methylene blue under bright sunlight. In conclusion, the fabricated TBW-CQDs provide a promising, cost-effective, and precise approach to acrylamide detection in drinking water.