Results 81 to 90 of about 79,429 (193)
Pyrrolizidine Alkaloids – Natural Toxins Risk in Queensland Honey
, 2017 Pyrrolizidine alkaloids are widely distributed natural toxins and their consumption has been connected with acute and chronic liver damage, and even death, in wildlife, livestock and humans.
Fletcher, M. T. +8 more
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Asymmetric and enantiospecific syntheses of 1-hydroxymethyl pyrrolizidine alkaloids
, 2014 Isoretronecanol and trachelantamidine (laburnine) are naturally occurring pyrrolizidine alkaloids which display potent biological activity, and as such these compounds have, in recent years, attracted significant interest from the bioorganic and ...
Stephen G. Davies +3 more
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BMC Complementary Medicine and TherapiesBackground Herbal products have been used for gas pains in children for many years. However, the quality of herbal products used in children and the presence of contamination in the products are controversial.
Semih Bulut +3 more
doaj +1 more source
, 1988 345 p.Alerts the medical and public health professions to the severe risks of morbidity and mortality posed by human consumption of plants, including cereals and herbal medicines, containing pyrrolizidine alkaloids. Citing well over 500 published studies,
World Health Organization +2 more
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Pyrrolizidine Alkaloids: Biosynthesis, Biological Activities and Occurrence in Crop Plants
Molecules, 2019 Pyrrolizidine alkaloids (PAs) are heterocyclic secondary metabolites with a typical pyrrolizidine motif predominantly produced by plants as defense chemicals against herbivores.
Sebastian Schramm +2 more
doaj +1 more source
Natural Product Communications, 2013 Although Senecio species are known as sources of potentially toxic pyrrolizidine alkaloids (PAs), some species of this genus are traditionally used as remedies, notably in Algeria.
Soukaina Tidjani +6 more
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Pyrrolizidine alkaloids in honey: determination with liquid chromatography-mass spectrometry method
Journal of Veterinary Research, 2018 Pyrrolizidine alkaloids (PAs) are probably the most widespread toxins of natural origin. More than 6,000 plant species produce these toxic compounds. Bees can forage on flowers of plants producing PAs, which leads to contamination of honey with the toxic
Kowalczyk Ewelina, Kwiatek Krzysztof
doaj +1 more source
, 2012 [[abstract]]Plants that contain pyrrolizidine alkaloids and pyrrolizidine alkaloid N-oxides are widely distributed in the world. These plants are probably the most common poisonous plants affecting livestock, wildlife, and humans.
Peter. P. Fu; Ming W. Chou; Qingsu Xia; Ya-Chen Yang; Jian Yan; Daniel R. Doerge; Po-Cheun Chan
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Improved Method for Isolation of Lycopsamine from Roots of Comfrey ()
Natural Product Communications, 2012 An improved method for the isolation and purification of pyrrolizidine alkaloids from comfrey ( Symphytum officinale L.) roots was developed, introducing very fast, selective and ion residue-free reduction of N -oxides followed by ion-exchange ...
Damjan Janeš +2 more
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Pyrrolizidine Alkaloids: the underestimated natural toxicants
RevSALUS, 2022 Ana, Cláudia Ribeiro, Sandra Leal
doaj +1 more source