Abstract
The main focus of the current research was the characterization of the by-products from the steam distillation of Lavandula angustifolia Mill. (LA) and Lavandula x intermedia Emeric ex Loisel (LI) aerial parts, as they are important sources of bioactive compounds suitable for several applications in the food, cosmetic, and pharmaceutical industries. The oil-exhausted biomasses were extracted and the total polyphenol and flavonoid contents were, respectively, 19.22 ± 4.16 and 1.56 ± 0.21 mg/g for LA extract and 17.06 ± 3.31 and 1.41 ± 0.10 mg/g for LI extract. The qualitative analysis by liquid chromatography-electrospray tandem mass spectrometry (HPLC-ESI-MS) revealed that both the extracts were rich in phenolic acids and glycosylated flavonoids. The extracts exhibited radical scavenging, chelating, reducing activities, and inhibitory capacities on acetylcholinesterase and tyrosinase. The IC50 values against acetylcholinesterase and tyrosinase were, respectively, 5.35 ± 0.47 and 5.26 ± 0.02 mg/mL for LA, and 6.67 ± 0.12 and 6.56 ± 0.16 mg/mL for LI extracts. In conclusion, the oil-exhausted biomasses demonstrated to represent important sources of bioactive compounds, suitable for several applications in the food, cosmetic, and pharmaceutical industries.
Highlights
In March 2020, the European Commission adopted the “new circular economy action plan”, one of the main building blocks of the “European green deal” for sustainable growth [1]
In the present work, the exhausted biomasses of L. angustifolia and L. intermedia were considered as the main characters of the research, as sources of natural bioactive compounds
It is well known that the aerial parts of the Lavandula species are important sources of polyphenols with countless activities
Summary
In March 2020, the European Commission adopted the “new circular economy action plan”, one of the main building blocks of the “European green deal” for sustainable growth [1]. The program was born to face the increment of agricultural wastes, co-products, and by-products in Europe, which have been esteemed to be more than 700 million tons every year [2] In this context, the scientific community is utilizing efforts to valorize the food and agricultural wastes, which might be rich sources of valuable compounds. The scientific community is utilizing efforts to valorize the food and agricultural wastes, which might be rich sources of valuable compounds Nowadays, these wastes, called biomasses, are mainly used for energy recovery by producing biofuel. The positive effects of secondary metabolites on human health were observed through the consumption of herbs in traditional medicine These compounds are usually classified according to the biosynthetic pathway, and the polyphenols’ group is one of the main ones, along with alkaloids and terpenes. Polyphenols exhibit health benefits for treating and preventing several conditions, such as age-related diseases, heart diseases, and cancers
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