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Stran 1 iz 39 rezultatov
Uptake of Lupanine by Alkaloid-Storing Epidermal Cells of Lupinus polyphyllus.
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Epidermis of steins and petioles of LUPINUS POLYPHYLLUS accumulates quinolizidine alkaloids at a concentration of about 30 mM. Since lupanine is synthesized mainly in green mesophyll tissue and not in the epidermis, the alkaloids have to be transported into the epidermal cells. Uptake of [
A comparative study of the effects of sparteine, lupanine and lupin extract on the central nervous system of the mouse.
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Lupin is toxic because of its alkaloid content, sparteine and lupanine in particular. Although the pharmacological properties of sparteine are well known those of lupanine have not been much studied. This paper reports procedures for extraction, purification and crystallization of lupanine, and
Turnover and transport of quinolizidine alkaloids. Diurnal fluctuations of lupanine in the phloem sap, leaves and fruits of Lupinus albus L.
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Quinolizidine alkaloids formed in the leaves of Lupinus albus L. are translocated via the phloem to the other plant organs, especially the maturing fruits. Compared with amino-acid transport in the phloem, the alkaloids contribute about 8% to the overall nitrogen being exported from the leaf. Since
Comparative pharmacological study of sparteine and its ketonic derivative lupanine from seeds of Lupinus albus.
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Lupanine in Lupinus hilarianus Benth.
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Biosynthesis of lupin alkaloids from 14CO2 evidence for the independent formation of lupanine and sparteine.
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Alkaloid profile of leaves and seeds of Lupinus hintonii C. P. Smith.
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L. hintonii C. P. Smith grows in the Central Highland forests of Mexico at altitudes between 2800 m to 3200 m above see level. Members of the genus Lupinus produce quinolizidine alkaloids as main chemical defensive compounds against herbivores. Surprisingly alkaloid profiles are rather constant
Safety evaluation of sweet lupine (Lupinus albus cv. Multolupa). II. Nine-month feeding and multigeneration study in rats.
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Sweet lupine Lupinus albus cv. Multolupa) flour containing 41.7% protein and 0.025% lupanine was fed for 9 months to two generations of rats (F1 and F2) at a level that provided 20% dietary protein. The diets were supplemented with 0.2% DL-methionine. The control diet provided the same dietary
Profile and Content of Residual Alkaloids in Ten Ecotypes of Lupinus mutabilis Sweet after Aqueous Debittering Process.
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The evaluation of the level of alkaloids in edible Lupinus species is crucial from a food safety point of view. Debittering of lupin seeds has a long history; however, the control of the level of alkaloids after processing the seeds is typically only evaluated by changes in the bitter taste. The aim
Bacterial removal of quinolizidine alkaloids and other carbon sources from a Lupinus albus aqueous extract.
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Two Gram-negative bacterial strains capable of using lupanine, the predominant quinolizidine alkaloid in Lupinus albus, as a sole carbon source were isolated from soil in which L. albus and L. luteus had been grown [Santana, F. M. et al. J. Ind. Microbiol. 1996, 17, 110-115]. In the present study,
Cellular localization of quinolizidine alkaloids by laser desorption mass spectrometry (LAMMA 1000).
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Stem sections of Lupinus polyphyllus and Cytisus scoparius have been analyzed for the distribution of quinolizidine alkaloids by laser desorption mass spectrometry, employing a LAMMA 1000 instrument. Sparteine and lupanine could be recorded and were found to be restricted to the epidermis and
Influence of plant secondary metabolites on in vitro oxidation of methyl ferulate with cell wall peroxidases from lupine apoplast.
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Ionically bound cell wall peroxidases (POXs) were liberated to intercellular washing fluids (IWFs) and isolated together with other proteins and metabolites present in the apoplast of white lupine (Lupinus albus L. var. Bac) root. After separation of proteins from low molecular weight compounds,
Alkaloids from Lupinus argenteus var. stenophyllus.
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TLC and GLC of an alkaloid extract of the aboveground portions of Lupinus argenteus Pursh. var. stenophyllus (Rydb.) Davis (Leguminosae) suggested the presence of sparteine, beta-isosparteine, delta5-dehydrolupanine, alpha-isolupanine, lupanine, thermopsine, and anagyrine. GLC-mass spectrometry
Alkaloid profiles, concentration, and pools in velvet lupine (Lupinus leucophyllus) over the growing season.
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Lupinus leucophyllus is one of many lupine species known to contain toxic and/or teratogenic alkaloids that can cause congenital birth defects. The concentrations of total alkaloids and the individual major alkaloids were measured in three different years from different plant parts over the
The effect of body condition on disposition of alkaloids from silvery lupine (Lupinus argenteus pursh) in sheep.
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Several species of lupine (Lupinus spp.) are poisonous to livestock, producing death in sheep and "crooked calf disease" in cattle. Range livestock cope with poisonous plants through learned foraging strategies or mechanisms affecting toxicant disposition. When a toxic plant is eaten, toxicant
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