Sw. (Myrtaceae) is a shrub distributed all over South America and Brazil. Its leaves are traditionally used to treat digestive problems and infections. Several biological activities have been reported for extracts, however phytochemical studies are scarce. The present study is on the isolation of compounds from leaf extracts using chromatographic and spectroscopic techniques and evaluation of their antibacterial activity. Araçain, a tyrosol derivative was isolated as a natural product for the first time. Other compounds isolated were ursolic acid, a phaeophorbide and three flavonoids. The extracts were tested for their antimicrobial activity against strains and they showed moderate to high antibacterial activity.
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http://dx.doi.org/10.1080/14786419.2019.1672683 | DOI Listing |
Molecules
January 2025
Institute of Chemistry, Slovak Academy of Sciences, Dúbravská Cesta 9, SK-845 38 Bratislava, Slovakia.
Phenylethanoid glycosides (PhGs) are widely occurring secondary metabolites of medicinal plants with interesting biological activities such as antioxidant, anti-inflammatory, neuroprotective, antiviral, hepatoprotective, immunomodulatory, etc. They are characterized by a structural core formed by a phenethyl alcohol, usually tyrosol or hydroxytyrosol, attached to β-D-glucopyranose via a glycosidic bond. This core is usually further decorated by attached phenolic acids or another saccharide.
View Article and Find Full Text PDFFoods
January 2025
Department of Chemistry, University of La Rioja, 26006 Logroño, Spain.
This study explores approaches to enhancing the biostability of extra virgin olive oil (EVOO) supplemented with olive fruit extract (OFE) enriched with hydroxytyrosol (HTyr). The investigation focuses on prolonged deep frying (DF) conditions at 170 °C and 210 °C, over durations ranging from 3 to 48 h, with the aim of improving sensorial attributes, polyphenolic content, and thermal oxidative stability. Parameters, such as acidity, peroxide value (PV), K, K, ΔK, phenolic compounds, and sensory attributes, were monitored.
View Article and Find Full Text PDFNat Commun
January 2025
Modern Research Center for Traditional Chinese Medicine, Beijing Institute of Traditional Chinese Medicine, Beijing University of Chinese Medicine, 102488, Beijing, PR China.
Echinacoside (ECH), one of the most representative phenylethanoid glycosides (PhGs), has considerable neuroprotective effects and is an effective ingredient in numerous commercial drugs. Here, we elucidate the complete ECH biosynthetic pathway in the medicinal plant Cistanche tubulosa. In total, 14 related genes are cloned and functionally characterized.
View Article and Find Full Text PDFCrit Rev Food Sci Nutr
January 2025
Department of Pharmaceutical Botany, Faculty of Pharmacy, "Iuliu Hațieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania.
The so-called Mediterranean diet, with olive oil as a key component, is effective in reducing cardiometabolic disease risk. Olive oil consumption improves blood pressure, insulin levels and resistance, supporting heart health and glycemic control. Its phenolic compounds, including oleuropein (OLE), hydroxytyrosol (HT), and tyrosol (TYR) are hypothesized to likely contribute to these benefits.
View Article and Find Full Text PDFExpert Opin Drug Deliv
January 2025
Smart Materials, Istituto Italiano di Tecnologia, Genova, Italy.
Introduction: Chronic non-healing wounds have emerged as a significant global healthcare challenge. Biofilm induced wound infections has been widely acknowledged. Despite the advanced understanding of biofilm formation, the existing approaches for diagnosing biofilms in wounds remain considerably suboptimal.
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