An upsurge in the global demand for safe and healthy food with minimal synthetic preservatives has raised the need for natural antimicrobial agents. Plant based products, especially essential oils (EOs) exhibit strong antimicrobial activities that could play a significant role as a novel source of food preservatives. However, hydrophobicity, high volatility, susceptibility to oxidation, low stability and solubility limit the uses of essential oils. Therefore, nanoencapsulation could be promising technique to address these limitations as it prevents the exposure and degradation of essential oils, by creating a physical barrier that protects the bioactive constituents. Furthermore, it also facilitates their controlled release, resulting into enhanced bioavailability as well as efficacy in the food system. Present review highlights the various encapsulating methods and provides insight about some encapsulated essential oils and their bioactive properties.
A comprehensive study on bio-control efficacy of different Pseudomonas species was made in terms of cell wall degrading enzymes, viz. chitinase, lipase, protease and antibiotic 2, 4- diacetylphloroglucinol (2,4- DAPG) production abilities in respect to changing temperatures and pH. Observations revealed that all the isolates of Pseudomonas spp. under study produced all the three cell wall degrading enzymes and 2,4- DAPG significantly. However, the isolates PS-11 and PS-30 exhibited maximum enzyme producing abilities. Moreover, PS-11 could be considered to be the maximum heat tolerant among the isolates as it maintain remarkable sustainability even at 55° C in the ability to produce enzymes with minimum losses in activities 0.1026 to 0.718 in chitinase, 3.1167 to 2.1794 in lipase and 0.5827 to 0.4075 in protease activities due to rise of temperature from 45° C to 55° C. In pH variation studied at 35°C, it was observed that chitinase, lipase and protease production abilities of most of the isolates of Pseudomonas spp. were maximum at pH value of 6.5 and decreased on further lowering to 5.5 or rising to pH 8.5. PS-30 recorded the highest production of 2,4-DAPG (767.37 μg/ml) at 30° C and pH 6.5.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.