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<p>Cv. ‘Barhi’ date fruits are perishable commodities with a&#xa0;short storage period. The effect of alginate, alginate-based silver nanoparticles (AgNPs) and alginate-AgNPs incorporated with salicylic acid (SA) or sodium nitroprusside (SNP) on quality properties and storage behavior of ‘Barhi’ date fruits was studied. Alginate-AgNPs were synthesized using a&#xa0;chemical reduction approach; SA at 5 mM and SNP at 0.1 mM were added during the preparation of the coating nano-composite. Date fruits were coated and stored at 4 °C for 6&#xa0;weeks. Alginate-AgNPs incorporated with SA and SNP recorded high antibacterial capacities against the growth of <i>Escherichia coli</i> bacteria. The results showed a&#xa0;linear increase in weight loss, decay, Rutab, total soluble solids, and total sugars during the storage period. However, this increase was significantly reduced in the coated fruits compared to the uncoated fruits. Firmness and total phenols significantly decreased during storage compared to untreated fruits. These findings showed the efficacy of alginate-AgNPs enriched with SA and SNP coatings in reducing microbial activity, delaying fruit ripening, and maintaining fruit quality during cold storage. Therefore, these coatings could be a&#xa0;promising alternative material for prolonging the cold storage period and extending the marketability of ‘Barhi’ date palm fruits.</p>

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Efficacy of Alginate-Silver Nanoparticle Coatings for Extending the Storage Period and Maintaining the Physico-chemical Parameters of Cold-Stored ‘Barhi’ Date Fruits

  • 期刊论文

  • 发表日期：

    2025年8月7日

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  • Sahar M. Abd Elwahab,
  • Abdou M. Abdallatif,
  • Abd El-Rahman A. Abd El-Hafeez,
  • Sondos M. Soliman

摘要

Cv. ‘Barhi’ date fruits are perishable commodities with a short storage period. The effect of alginate, alginate-based silver nanoparticles (AgNPs) and alginate-AgNPs incorporated with salicylic acid (SA) or sodium nitroprusside (SNP) on quality properties and storage behavior of ‘Barhi’ date fruits was studied. Alginate-AgNPs were synthesized using a chemical reduction approach; SA at 5 mM and SNP at 0.1 mM were added during the preparation of the coating nano-composite. Date fruits were coated and stored at 4 °C for 6 weeks. Alginate-AgNPs incorporated with SA and SNP recorded high antibacterial capacities against the growth of Escherichia coli bacteria. The results showed a linear increase in weight loss, decay, Rutab, total soluble solids, and total sugars during the storage period. However, this increase was significantly reduced in the coated fruits compared to the uncoated fruits. Firmness and total phenols significantly decreased during storage compared to untreated fruits. These findings showed the efficacy of alginate-AgNPs enriched with SA and SNP coatings in reducing microbial activity, delaying fruit ripening, and maintaining fruit quality during cold storage. Therefore, these coatings could be a promising alternative material for prolonging the cold storage period and extending the marketability of ‘Barhi’ date palm fruits.