riddelliine/žilė

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Development of enzyme-linked immunosorbent assays for the hepatotoxic alkaloids riddelliine and riddelliine N-oxide.

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Prisijungti Registracija

Pyrrolizidine alkaloid-containing plants are widely distributed throughout the world and are particularly common in the genus Senecio. The structural types and concentrations of the alkaloids vary among plant species. In addition, within a species of plant, concentrations vary with environment and

GC/MS/MS detection of pyrrolic metabolites in animals poisoned with the pyrrolizidine alkaloid riddelliine.

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Prisijungti Registracija

Pyrrolic metabolites from pyrrolizidine alkaloids (PAs) were detected in liver and dried blood samples using a gas chromatography/tandem mass spectrometry (GC/MS/MS) selected product-ion-monitoring method. A calibration curve was constructed using a protein-metabolite conjugate spiked into dried

Synthesis of [3,5-14C]trachelanthamidine and [5-3H]isoretronecanol and their incorporation into the retronecine moiety of riddelliine in Senecio riddellii.

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Prisijungti Registracija

(+/-)-[3,5-14C]Trachelanthamidine and (+/-)-[5-3H]isoretronecanol, which are diastereomers, were prepared from potassium [14C]cyanide and [5-3H]proline, respectively. These compounds and [1,4-14C]putrescine were administered to Senecio riddellii plants resulting in the formation of labeled

Toxicity of pyrrolizidine alkaloids from Riddell groundsel (Senecio riddellii) to cattle.

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Prisijungti Registracija

The toxicity of Riddell groundsel (Senecio riddellii) gavaged to calves at a known lethal rate was compared with the toxicity of riddelliine and riddelliine N-oxide, the pyrrolizidine alkaloids isolated from the plant, which were fed by intraruminal infusion. Doses of the alkaloids were adjusted to

Hydrolysis rates of pyrrolizidine alkaloids derived from Senecio jacobaea.

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Prisijungti Registracija

Many of the commonly studied pyrrolizidine alkaloids (PAs) are built upon the subgroup retronecine (RET), which is released from the parent molecule by either base catalyzed or enzymatic hydrolysis of the ester linkages. The rate of appearance of RET in a hydrolytic study would thus reflect the rate

Evaporative light scattering detection of pyrrolizidine alkaloids.

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Prisijungti Registracija

A reverse-phase high-performance liquid chromatography method utilizing evaporative light scattering detection (ELSD) has been developed for the simultaneous detection of hepatotoxic pyrrolizidine alkaloids with and without chromophores, namely, riddelliine, riddelliine N-oxide, senecionine,

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