Results 41 to 50 of about 386 (118)
Chemistry &Biodiversity, Volume 23, Issue 4, April 2026.ABSTRACT This study aimed to evaluate the antitumor activity of fractions rich in indole alkaloids extracted from the leaves of the species Tabernaemontana catharinensis. The chemical composition was analyzed using high‐resolution mass spectrometry (HRMS), which identified nine known indole alkaloids, including voacangine, voacangine hydroxyindolenine,
Ana Júlia Gomes Donada +5 more
wiley +1 more source
Use of a new LC-MS method for the determination of pyrrolizidine alkaloids in feeds
Journal of Veterinary Research, 2018 Pyrrolizidine alkaloids (PAs) are secondary metabolites produced by many plant species. Due to their toxicity PAs can pose a risk to human and animal health.
Kowalczyk Ewelina, Kwiatek Krzysztof
doaj +1 more source
Natural Sciences, Volume 6, Issue 2, April 2026.Synthesis, characterization and biological activities of ZnO nanoparticles. ABSTRACT Zinc oxide nanoparticles (ZnO‐NPs) are inexpensive, non‐toxic, and biocompatible with human cells, making them suitable for biomedical applications. In the present study, ZnO‐NPs were synthesized from Heliotropium europaeum extracts at different concentrations through ...
Adel Manseur +8 more
wiley +1 more source
ChemistryOpen, Volume 15, Issue 4, April 2026.Natural products derived from plants, animals, fungi, bacteria, and minerals contain diverse bioactive classes such as alkaloids, flavonoids, terpenoids, saponins, tannins, and phenolics. These natural products work through different mechanisms, including ROS inhibition, NF‐κB suppression, and cytokine regulation, and exhibit wide applications across ...
Sajid Ali +4 more
wiley +1 more source
PHYTOCHEMICAL STUDY OF CROTALARIA THEBAICA (DEL.) DC. GROWING IN EGYPT [PDF]
Bulletin of Pharmaceutical Sciences. Assiut University, 1990 From the chloroformic extract of Crotalaria thebaica (Del.)Dc. herb, three pyrrolizidine alkaloids, Spectabiline, Monocrotaline and Crosemperine as well as b-sitosterol glycoside and daidzein were isolated.
K. Takeya +5 more
doaj +1 more source
Convergence and parallelism in the evolution of plant metabolism
Journal of Integrative Plant Biology, Volume 68, Issue 4, Page 1013-1031, April 2026.Similar traits in different organisms may originate from shared ancestry or evolve independently. The terminology used to define phenotypic similarity is often confusing. This review attempts to clarify the definitions and present examples from plant domestication and specialized metabolism to explain how complex traits evolve repeatedly in plants ...
Federico Scossa +4 more
wiley +1 more source
Pyrrolizidine alkaloids in foods
, 2003 In addition to the many well-known major nutrients (protein, fat, carbohydrate and fiber) and minor nutrients (vitamins, minerals and nonessential compounds), foods contain thousands of naturally present toxic plant compounds. Some are carcinogenic in animals, and thus may be potentially carcinogenic in people.
openaire +3 more sources
Food Risk Assess Europe, Volume 4, Issue 2, April 2026.Abstract Mycotoxins (mould toxins) are secondary metabolites of moulds. They are natural toxins whose occurrence in food and feed is undesirable but cannot be completely avoided. Mycotoxins may occur as contaminants in plant products and raw materials such as grains, nuts and almonds if they are infested with mould during cultivation, storage or ...
German Federal Institute for Risk Assessment (BfR)
wiley +1 more source
Supinidine Viridiflorates from the Roots of
Natural Product Communications, 2013 The alkaloid extract from the roots of Chromolaena pulchella provided two new pyrrolizidine alkaloids, elucidated as (-)-supinidine triviridiflorate ( 1 ) and (-)-supinidine diviridiflorate ( 2 ) based on their physical and spectroscopic properties ...
Mario A. Gómez-Hurtado +7 more
doaj +1 more source
Journal of Biochemical and Molecular Toxicology, Volume 40, Issue 3, March 2026.Imidazole alkaloids epiisopilosine and epiisopiloturine protect the liver against acetaminophen‐induced toxicity by reducing oxidative stress, suppressing inflammatory mediators, and restoring antioxidant defenses. These hepatoprotective effects are partially mediated by enhanced autophagy, indicating a key mechanistic pathway for the biological ...
Ana Patricia de Oliveira +19 more
wiley +1 more source