Results 91 to 100 of about 46,895 (288)

Constituintes químicos de Hyptidendron canum (Pohl ex Benth.) R. Harley (Lamiaceae)

open access: yesQuímica Nova, 2011
Chemical investigation of Hyptidendron canum stems resulted in the isolation of betulinic, ursolic and euscaphic acids. From the leaves were isolated 3β-O-β-galactopiranosilsitosterol, ursolic aldehyde, and mixtures of maslinic acid and 2α-hydroxyursolic
Geralda de Fátima Lemes   +2 more
doaj   +1 more source

Anti-inflammatory and antioxidative effects of six pentacyclic triterpenes isolated from the Mexican copal resin of Bursera copallifera

open access: yesBMC Complementary and Alternative Medicine, 2016
BackgroundBursera copallifera (Burseraceae) releases a resin known as “copal ancho” which has been used, since pre-Colombian times, as ceremonially burned incense and to treat tooth ache, tumors, arthritis, cold, cough, and various inflammatory ...
Antonio Romero-Estrada   +6 more
semanticscholar   +1 more source

Comparative Phytochemical Analysis of Five South African Bulbine Species Using Chromatography‐Based Methods

open access: yesChemistry &Biodiversity, Volume 23, Issue 6, June 2026.
Comprehensive chromatographic and chemometric profiling of five medicinal South African Bulbine species across leaves, rhizomes, and roots reveals 73 metabolites, including species‐specific phenylanthraquinones, flavonoids, and anthocyanins, that serve as reliable chemical markers for species authentication.
Ramoagi T. Segone   +7 more
wiley   +1 more source

CHEMICAL COMPOSITION AND BIOLOGICAL ACTIVITIES OF EXTRACTS AND ISOLATED COMPOUNDS FROM THE ROOTS OF Bowdichia virgilioides (Fabaceae) [PDF]

open access: yesQuímica Nova
This study describes the chemical composition and biological activities of extracts and compounds obtained from the roots of Bowdichia virgilioides (Fabaceae).
Klauber Viana Cardoso   +2 more
doaj   +1 more source

An Innovative Strategy to Enhance Polyphenol Content and Quality Traits of Olive Oil and Valorization of Mill Wastewater

open access: yeseFood, Volume 7, Issue 3, June 2026.
The new technique, by exploiting and modifying the partition coefficients of various molecules in immiscible solvents, makes it possible to obtain olive oils rich in polyphenols with outstanding characteristics. Moreover, the extension of this technique allows the transfer of polyphenols present in vegetation water into any lipid matrix, such as seed ...
Davide Laurenti   +9 more
wiley   +1 more source

Avocado Oil: Commercial Hass Versus Other Varieties—Fatty Acid Profile and Quality

open access: yesEuropean Journal of Lipid Science and Technology, Volume 128, Issue 6, June 2026.
Avocado oils vary in their fatty acid profiles depending on the variety. We compared commercial Hass avocado oils with local Brazilian varieties and olive oils, finding that some non‐commercial varieties, such as Primavera and Galavote, exhibit a quality similar to olive oil.
Wilton Soares Cardoso   +6 more
wiley   +1 more source

Thirteen Novel Cycloartane-Type Triterpenes from Combretum quadrangulare

open access: yes, 2016
Thirteen novel cycloartane-type triterpenes were isolated from Combretum quadrangulare, a Vietnamese medicinal plant. The structures of the novel triterpenes were determined by spectroscopic methods as well as by chemical transformations.
Shigetoshi Kadota (510441)   +5 more
core   +1 more source

CHEMICAL CONSTITUENTS AND ANTIBACTERIAL ACTIVITY OF THREE TYPES OF AMAZONIAN Melipona spp. GEOPROPOLIS

open access: yesQuímica Nova
This work describes the first chemical study on the metabolic profile of three geopropolis samples from Melipona fulva, M. compressipes, and M. paraensis collected in the Amazonian region. The samples were submitted to solvent extractions.
Darlan C. dos Santos   +7 more
doaj   +1 more source

Triterpene Glycosides and Glucosyl Esters, and a Triterpene from the Leaves of Schefflera actinophylla

open access: yesChemical and Pharmaceutical Bulletin, 2010
From the EtOAc and 1-BuOH fractions, three new ursane-type and four new lupane-type triterpenes, along with nine known glycosides and glycosyl esters of lupane-type were isolated from the leaves of Schefflera actinophylla. All the isolated compounds were obtained for the first time from this plant.
Wanas, Amira Samir   +5 more
openaire   +3 more sources

Contribution of Free Fatty Acids to Emulsion Building and Stability: Understanding the Mechanism From the Case Study of a Crude Red Palm Oil (Elaeis guineensis)—Based Emulsion Consumed in Africa and Known as Achu Soup/Sauce Jaune/Ncha

open access: yesFood Chemistry International, Volume 2, Issue 2, Page 222-235, June 2026.
In an aqueous alkaline medium, fatty acids (from the hydrolysis of triglycerides or freely present in the oil) are ionised in order to form emulsifiers (carboxylates) which will physically stabilise the prepared emulsion. The higher the free fatty acids content of the oil and alkalinity of the solution, the higher will be the stability of the prepared ...
Ngoualem Kégah Franklin   +3 more
wiley   +1 more source

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