ArticleScientific reports2026
Optimization of drying and packaging strategies for preserving phytochemicals, nutrients, and bioactivity in Bauhinia purpurea petals.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Bauhinia purpurea L. is regarded as a superior plant because of the phytochemical components found in its bark, seed, leaves, and flowers. As a winter-flowering tree, B. purpurea requires the petals to be stored with intact phytochemicals in order to be available all year round. Various drying techniques were employed, such as solar drying, oven drying, and freeze drying. The dried petals was then packaged in glass bottles, plastic bags, aluminium foil bags, and plastic bottles. Fresh petals have higher concentrations of Mn, Zn), and Cu compared to N, P, K, and Mg. The oil obtained from fresh petals contained the highest concentrations of methyl cis-8,11,14-eicosatrienoate, methyl palmitoleate, and methyl arachidate, The lowest percentage peak area is seen for methyl heneicosanoate, methyl linoleate, and methyl myristoleate, which have relative peak areas of 0.91, 1.44, and 1.52%, respectively. The ethanolic extract of B. purpurea petals demonstrated greater antimicrobial activity at 20 mg concentration against S. typhi, Proteus sp., Enterobacter sp., Pseudomonas sp., and Klebsiella sp. than hexane and acetonitrile extracts. The solar-dried had greater concentrations of protein, carbohydrates, reducing sugar, carotenoid, phenol, flavonoids, antioxidants, oxalate, and tannic acid. Alkaloids and phytic acid, which are regarded as anti-nutritional, have been demonstrated to have lower values when oven-dried at 50 °C and freeze-dried at 50 °C, respectively. While the phenol, flavonoid, and carotenoid contents appeared to be higher in all dried samples, the anthocyanin concentration decreased dramatically (p < 0.05) in all dry samples. After analysing the stored sample for three months, it was found that most of the parameters showed a negative connection with the increased months of storage. However, solar dry sample with three months of storage showed to preserve maximum metabolite compare to all other methods. Aluminum bag packaging retained maximum content of anthocyanin, carotenoid and antioxidants.
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