Consulta: subjectFacets:"Pyrrolizidine alkaloids"
Registros recuperados: 2
Data/hora: 04/06/2024 01:18:35

3-Acetoxy-fatty acid isoprenyl esters from androconia of the ithomiine butterfly Ithomia salapia
Provedor de dados: 5
Autores: Mann, Florian; Szczerbowski, Daiane; De Silva, Lisa; Mcclure, Melanie; Elias, Marianne; Schulz, Stefan.
Male ithomiine butterflies (Nymphalidae: Danainae) have hairpencils on the forewings (i.e. androconia) that disseminate semiochemicals during courtship. While most ithomiines are known to contain derivatives of pyrrolizidine alkaloids, dihydropyrrolizines or g-lactones in these androconia, here we report on a new class of fatty acid esters identified in two subspecies, Ithomia salapia aquinia and I. s. derasa. The major components were identified as isoprenyl (3-methyl-3-butenyl) (Z)-3-acetyloxy-11-octadecenoate, isoprenyl (Z)-3-acetyloxy-13-octadecenoate (12) and isoprenyl 3-acetyloxyoctadecanoate (11) by GC/MS- and GC/IR-analyses, microderivatizations, and synthesis of representative compounds. The absolute configuration of 12 was determined to be R. The...
Tipo: Text
Palavras-chave: Fatty acid esters; Mass spectrometry; Mimicry; Pheromones; Pyrrolizidine alkaloids.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00643/75512/76362.pdf

Effects of milk from goat fed Crotalaria spectabilis seeds on growing rats
Provedor de dados: 62
Autores: MEDEIROS,Rosane Maria Trindade de; GÓRNIAK,Silvana Lima; GUERRA,José Luis.
Seeds of Crotalaria spectabilis, containing the pyrrolizidine alkaloid (PA) monocrotaline (MCT), were fed to a lactating dairy goat. Milk from this goat was fed to rats for 8 weeks to determine whether MCT or its toxic metabolites are transferred into the goat’s milk. Rats from the experimental group showed significantly higher (p&lt;0.05) serum levels of ALT, AST, GGT and LDH and less weight gains (p&lt;0.05) than control rats. The most significant lesions in rats consuming the experimental ration were mild to moderate interstitial pneumonia and a vacuolar degeneration and occasionally necrosis of periportal hepatocytes. The results of this study indicate that the PA and/or its metabolites are eliminated in milk.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Milk; Pyrrolizidine alkaloids; Crotalaria spectabilis; Poisoning.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95961999000200008