Browsing by Author "Kamlesh Kumar Meena"

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Optical, thermal, FTIR, SEM-EDX and 1H NMR analysis of Chenopodium album (Bathua) powder prepared using different drying techniques
(Elsevier Inc., 2024) B. Keerthi Reddy; Sunil Meena; Priyae Brath Gautam; Kamlesh Kumar Meena; Dinesh Chandra Rai
Chenopodium album (L.) is an underutilized agricultural crop consumed as a leafy vegetable in Asian countries. Although perishable and cultivated in a specific season, it contains nutrients and phytochemicals in abundance. Preservation by employing drying techniques helps in their utilization in the off-season for better food security. In the present study, Chenopodium album leaves were dried using sun, tray, and freeze drying. The different powder samples were characterized on the basis of their physicochemical, optical, and thermal properties. The water activity of powder samples ranged between 0.29 and 0.56. The highest color retention (L* value 47.21) and lowest particle size (11.5 µm) was observed in freeze dried samples. Fourier-transform infrared spectroscopy and Nuclear magnetic resonance spectra confirmed the presence of several functional groups. Thermal analysis revealed the thermal degradation of powder due heat as depicted by change of state and loss of weight. Surface morphological study indicated that powder samples were flowable and element analysis showed presence of C, O, K, Ca, Mg, P, S element in powders. © 2024 Elsevier B.V.
Physicochemical and bioactive constituents, microbial counts, and color components of spray-dried Syzygium cumini L. pulp powder stored in different packaging materials under two controlled environmental conditions
(Frontiers Media SA, 2023) Vishal Kumar; Chandra Shekhar Singh; Shiva Bakshi; Sudhir Kumar; Satya Prakash Yadav; Zakarya Ali Saleh Al-Zamani; Pankaj Kumar; Upendra Singh; Kamlesh Kumar Meena; Durga Shankar Bunkar; Vinod Kumar Paswan
Currently, the demand for functional food items that impart health benefits has been rising. Blackberry (Syzygium cumini L.) fruit has high anthocyanin content and other functional attributes. However, this seasonal fruit is highly perishable, and a large proportion of it goes unharvested and wasted worldwide. Spray drying of the fruit pulp can impart improved shelf life, ensuring long-term availability for consumers to exploit its health benefits. The storage quality varies according to the type of packaging material and the storage environment. Therefore, in this study, the shelf life span of the spray-dried Syzygium cumini L. pulp powder (SSCPP) was investigated during 6 months of storage under three types of packaging materials (i.e., polystyrene, metalized polyester, and 4-ply laminates) in a low-temperature environmental (LTE) and at ambient environmental conditions. The physicochemical stability of bioactive principles (TPC and TAC), microbial counts, and color components were analyzed at 0, 2, 4, and 6 months of storage. There was a significant gradual loss of dispersibility and solubility with an increase in flowability, bulk density, and wettability during the entire storage period for all three packaging materials. The TSS, pH, TPC, TAC, and microbial counts decreased in the SSCPP both at ambient and LTE conditions during the study. Among all the packaging materials, the 4-ply laminate was found to be the most appropriate and safe for storage of spray-dried SCPP at LTE conditions. Copyright © 2023 Kumar, Singh, Bakshi, Kumar, Yadav, Al-Zamani, Kumar, Singh, Meena, Bunkar and Paswan.