Results 21 to 30 of about 172,060 (247)
Foods, 2023 Pyrrolizidine alkaloids are secondary metabolites produced by plants as a defense against insects. These can cause acute or chronic toxicity in humans. Therefore, avoiding potential poisoning from the consumption of tea and culinary plants contaminated ...
Zinar Pinar Gumus
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Extracting and Analyzing Pyrrolizidine Alkaloids in Medicinal Plants: A Review
Toxins, 2020 Pyrrolizidine alkaloids (PAs) are distributed in plant families of Asteraceae, Boraginaceae, and Fabaceae and serve in the chemical defense mechanism against herbivores.
T. Kopp, Mona Abdel-Tawab, B. Mizaikoff
semanticscholar +1 more source
Journal of Veterinary Research, 2022 Pyrrolizidine alkaloids (PAs) and tropane alkaloids (TAs) are natural contaminants of honey and respectively hepatoxic and neurotoxic compounds. Because honey is a popular constituent of the human diet, it is relevant to warrant the safety of the product.
Kowalczyk Ewelina, Kwiatek Krzysztof
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Detection and toxicity evaluation of pyrrolizidine alkaloids in medicinal plants Gynura bicolor and Gynura divaricata collected from different Chinese locations [PDF]
, 2017 Two edible plants in Southeast Asia, Gynura bicolor and G.divaricata, are not only known to be nutritive but also useful as medicinal herbs. Previous phytochemical investigation of Gynura species showed the presence of hepatotoxic pyrrolizidine alkaloids
Chen, Jian +7 more
core +2 more sources
Toxins, 2020 Pyrrolizidine alkaloids (PA) and their N-oxides (PANO) are a group of toxic secondary plant metabolites occurring predominantly as contaminants in (herbal) teas, honeys and food supplements, as well as in spices and culinary herbs.
Florian Kaltner +3 more
semanticscholar +1 more source
Molecules, 2021 Seeds of Crotalaria cleomifolia (Fabaceae) are consumed in Madagascar in preparation of popular beverages. The investigation of extracts from the seeds of this species revealed the presence of high amounts of alkaloids from which two pyrrolizidine ...
Anjaramampionona Henintsoa Duvale Solofomalala +6 more
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Diversity, 2014 Among the diversity of secondary metabolites which are produced by plants as means of defence against herbivores and microbes, pyrrolizidine alkaloids (PAs) are common in Boraginaceae, Asteraceae and some other plant families. Pyrrolizidine alkaloids are
Assem El-Shazly, Michael Wink
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Effects and mechanisms of natural alkaloids for prevention and treatment of osteoporosis
Frontiers in Pharmacology, 2022 Natural alkaloids are polycyclic, nitrogen-containing, and basic compounds obtained from plants. In this review, the advances in bioactive alkaloids with respect to their chemical structures, herbal sources, and effects for the prevention and treatment ...
Bingfeng Lin +6 more
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Novel pyrrolizidine alkaloid [PDF]
, 1991 The present invention involves a purified bioactive compound of the formula: ##STR1## wherein at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are H or an acyl having less than about five carbon atoms.
Elbein, Alan D., Tropea, Joseph E.
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Screening of food supplements for toxic pyrrolizidine alkaloids
Journal of Consumer Protection and Food Safety, 2020 Pyrrolizidine alkaloids (PA) and PA-N-oxides (PANO) are a group of more than 660 secondary plant metabolites with hepatotoxic, carcinogenic and mutagenic effects in animals and humans.
Florian Kaltner +2 more
semanticscholar +1 more source