Fully ripened ‘Lalit’ guava (Psidium guajava L.) fruits (Skin brightness, L value = 60.81 ± 4.18; a* = 3.30 ± 0.47) were harvested from guava orchard located at Pune, India and brought to the research laboratory in cardboard boxes (at temperature of 25 °C). Bovine serum albumin-V, hydrogen peroxide was procured from Himedia laboratories Pvt Ltd., India Acetone, butylated hydroxytoluene, ethanol, hexane, guaiacol, metaphosphoric acid, acetic acid, sulphuric acid, ammonium molybdate, pectin, phenol red, L-AA and catechol were purchased from SD Fine Chemicals Pvt. Ltd., India. Bradford reagent was obtained from Bio-Rad, US. All chemicals used in the analysis were of analytical grade.
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