1.
Joseph, S.; Hegde, A. R.; Gopalakrishnan, V.; Yallappa, S.; Nadzri, N. I. M.; Joseph, K.; Meenakshi, K.
Biodegradable Plastics from Mango Seed Starch for Sustainable Food Packaging-Effect of Citric Acid and Fillers Journal Article
In: ChemistrySelect, vol. 9, pp. e202401312+, 2024, ISBN: 23656549 (ISSN), (1).
Abstract | Links | Tags: CCCIR
@article{40,
title = {Biodegradable Plastics from Mango Seed Starch for Sustainable Food Packaging-Effect of Citric Acid and Fillers},
author = {S. Joseph and A. R. Hegde and V. Gopalakrishnan and S. Yallappa and N. I. M. Nadzri and K. Joseph and K. Meenakshi},
doi = {10.1002/slct.202401312},
isbn = {23656549 (ISSN)},
year = {2024},
date = {2024-01-01},
journal = {ChemistrySelect},
volume = {9},
pages = {e202401312+},
publisher = {John Wiley and Sons Inc},
abstract = {Starch based bioplastics were prepared and characterized with fillers carboxy methyl cellulose (CMC), chitosan (CS) and nanochitosan (NCS); plasticizer sorbitol and cross-linking agent citric acid (CA) at different loading levels. Structural, water resistance, water vapor permeability, solubility, mechanical, antimicrobial and biodegradation properties of the bioplastics were investigated. FTIR confirmed bonding of starch with cross-linking agent, fillers and plasticizer. The water uptake of the CMC bioplastics was decreased up to 70 % with 20 % CA addition. Bioplastics with CS and NCS showed lesser water uptake, only 12.5 % for CS bioplastic. The water vapour permeability (WVP) of all bioplastics was low in the range 2.16×10−7–6.29×10−7 gday−1 m−1 Pa−1. The CA addition increased water resistance and lowered WVP of the bioplastics by restricting the hydrophilic functional groups and forming more tight structures. The fillers CS and NCS additions enhanced the mechanical strength attributing to more hydrogen bonding between NH3+ of chitosan and OH− of starch. All bioplastics demonstrated good antimicrobial activities. These bioplastics offer an attractive alternative to non-biodegradable plastics used in food packaging due to its enhanced water resistance, antibacterial properties and biodegradability. © 2024 Wiley-VCH GmbH.},
note = {1},
keywords = {CCCIR},
pubstate = {published},
tppubtype = {article}
}
Starch based bioplastics were prepared and characterized with fillers carboxy methyl cellulose (CMC), chitosan (CS) and nanochitosan (NCS); plasticizer sorbitol and cross-linking agent citric acid (CA) at different loading levels. Structural, water resistance, water vapor permeability, solubility, mechanical, antimicrobial and biodegradation properties of the bioplastics were investigated. FTIR confirmed bonding of starch with cross-linking agent, fillers and plasticizer. The water uptake of the CMC bioplastics was decreased up to 70 % with 20 % CA addition. Bioplastics with CS and NCS showed lesser water uptake, only 12.5 % for CS bioplastic. The water vapour permeability (WVP) of all bioplastics was low in the range 2.16×10−7–6.29×10−7 gday−1 m−1 Pa−1. The CA addition increased water resistance and lowered WVP of the bioplastics by restricting the hydrophilic functional groups and forming more tight structures. The fillers CS and NCS additions enhanced the mechanical strength attributing to more hydrogen bonding between NH3+ of chitosan and OH− of starch. All bioplastics demonstrated good antimicrobial activities. These bioplastics offer an attractive alternative to non-biodegradable plastics used in food packaging due to its enhanced water resistance, antibacterial properties and biodegradability. © 2024 Wiley-VCH GmbH.
2.
Surendra, D. M.; Chamaraja, N. A.; Yallappa, S.; Bhavya, D. K.; Joseph, S.; Varma, R. S.; Manjanna, J.; Patel, B. M.
Efficacy of phytochemical-functionalized silver nanoparticles to control Flacherie and Sappe silkworm diseases in Bombyx mori L. larvae Journal Article
In: Plant Nano Biology, vol. 5, pp. 100048+, 2023, ISBN: 27731111 (ISSN), (2).
Abstract | Links | Tags: CCCIR
@article{16,
title = {Efficacy of phytochemical-functionalized silver nanoparticles to control Flacherie and Sappe silkworm diseases in Bombyx mori L. larvae},
author = {D. M. Surendra and N. A. Chamaraja and S. Yallappa and D. K. Bhavya and S. Joseph and R. S. Varma and J. Manjanna and B. M. Patel},
doi = {10.1016/j.plana.2023.100048},
isbn = {27731111 (ISSN)},
year = {2023},
date = {2023-01-01},
journal = {Plant Nano Biology},
volume = {5},
pages = {100048+},
publisher = {Elsevier B.V.},
abstract = {Plant extracts comprise a complex mixture of numerous phytochemicals including important alkaloids and polyphenols that can reduce metal ions, and comprise unsaturated compounds such as α-linolenic and carboxylic acid that acts as stabilizing agents in the greener assembly of nanomaterials. The present study demonstrates the role of phytoconstituents from flowers of Tridax trilobata (T. trilobata) in the synthesis of silver nanoparticles (AgNPs) that investigates their effects on the growth and development of the silkworm Bombyx mori L. besides controlling the occurrence of Flacherie and Sappe microbial diseases. FTIR and 13C NMR spectral studies confirmed the in situ role of phytochemicals from the flower extract responsible for the reduction of silver ions to AgNPs with crystalline structure, which is confirmed by XRD analysis. Compared to pure alkaloids and polyphenols, AgNPs synthesized with crude flower extract displayed synergistic antibacterial activity against Flacherie and Sappe microbial strains such as B. subtilis, S. aureus, E. coli, B. cereus, Aerobactercloacae, and S. typhi. Furthermore, AgNPs prevented the growth of biofilms in a concentration-dependent manner and an increase in inhibition is observed with concentration augmentation from 0 to 50 µg/mL. In addition, the biosynthesized AgNPs increased the feeding efficiency and improved the body weight and shell weight of Bombyx mori L. larvae, pupae, and cocoons. Overall, this integrated study found that AgNPs were effective in reducing Flacherie and Sappe disease caused by the consumption of bacterially contaminated mulberry leaves, thus improving the survival rate of Bombyx mori L. and eventually improving the crop yield through insights into the anti-biofilm activity of phytochemical-adorned AgNPs. © 2023 The Authors},
note = {2},
keywords = {CCCIR},
pubstate = {published},
tppubtype = {article}
}
Plant extracts comprise a complex mixture of numerous phytochemicals including important alkaloids and polyphenols that can reduce metal ions, and comprise unsaturated compounds such as α-linolenic and carboxylic acid that acts as stabilizing agents in the greener assembly of nanomaterials. The present study demonstrates the role of phytoconstituents from flowers of Tridax trilobata (T. trilobata) in the synthesis of silver nanoparticles (AgNPs) that investigates their effects on the growth and development of the silkworm Bombyx mori L. besides controlling the occurrence of Flacherie and Sappe microbial diseases. FTIR and 13C NMR spectral studies confirmed the in situ role of phytochemicals from the flower extract responsible for the reduction of silver ions to AgNPs with crystalline structure, which is confirmed by XRD analysis. Compared to pure alkaloids and polyphenols, AgNPs synthesized with crude flower extract displayed synergistic antibacterial activity against Flacherie and Sappe microbial strains such as B. subtilis, S. aureus, E. coli, B. cereus, Aerobactercloacae, and S. typhi. Furthermore, AgNPs prevented the growth of biofilms in a concentration-dependent manner and an increase in inhibition is observed with concentration augmentation from 0 to 50 µg/mL. In addition, the biosynthesized AgNPs increased the feeding efficiency and improved the body weight and shell weight of Bombyx mori L. larvae, pupae, and cocoons. Overall, this integrated study found that AgNPs were effective in reducing Flacherie and Sappe disease caused by the consumption of bacterially contaminated mulberry leaves, thus improving the survival rate of Bombyx mori L. and eventually improving the crop yield through insights into the anti-biofilm activity of phytochemical-adorned AgNPs. © 2023 The Authors