Antimicrobials From Plants - Food Preservation and Shelf Life Extension

Tsao, Rong

doi:10.1016/b978-0-444-64046-8.00249-4

Cited by 1 publication

(1 citation statement)

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“…The raw materials, which were ground into a paste, were extracted with a biomass to solvent ratio of 1:3.5 using an I-10-0.63 ultrasonic generator with an immersion probe at a frequency of 22.35 kHz and a power of 290 watts. The extraction was carried out at 45 • C for 15 min with constant stirring [74]. The homogenates were then centrifuged and dried as in the first step.…”

Section: Extract Preparation By Ultrasound-assisted Macerationmentioning

confidence: 99%

Comparative Analysis of Chemical Profile and Biological Activity of Juniperus communis L. Berry Extracts

Belov,

Terenzhev,

Bushmeleva

et al. 2023

Plants

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Researchers are looking for the most effective ways to extract the bioactive substances of Juniperus communis L. berries, which are capable of displaying the greatest range of biological activity, namely antimicrobial potential “against phytopathogens”, antioxidant activity and nematocidal activity. This study provides detailed information on the chemical activity, group composition and biological activity of the extracts of juniper berries of 1- and 2-year maturity (JB1 and JB2), which were obtained by using different solvents (pentane, chloroform, acetone, methanol and 70% ethanol) under various extraction conditions (maceration and ultrasound-assisted maceration (US)). Seventy percent ethanol and acetone extracts of juniper berries were analyzed via gas chromatography–mass spectrometry, and they contained monoterpenes, sesquiterpenes, polysaccharides, steroids, fatty acid esters and bicyclic monoterpenes. The antimicrobial activity was higher in the berries of 1-year maturity, while the acetone extract obtained via ultrasound-assisted maceration was the most bioactive in relation to the phytopathogens. Depending on the extraction method and the choice of solvent, the antioxidant activity with the use of US decreased by 1.5–1.9 times compared to the extracts obtained via maceration. An analysis of the nematocidal activity showed that the sensitivity to the action of extracts in Caenorhabditis elegans was significantly higher than in Caenorhabditis briggsae, particularly for the acetone extract obtained from the juniper berries of 1-year maturity.

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Section: Extract Preparation By Ultrasound-assisted Macerationmentioning

confidence: 99%