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Your search keyword '"Plants analysis"' showing total 12 results
Start Over Descriptor "Plants analysis" Topic alkaloids Topic indoles
12 results on '"Plants analysis"'

1. Identification of indole alkaloids of Catharanthus roseus with liquid chromatography/mass spectrometry using collision-induced dissociation with the thermospray ion repeller.

Author

Auriola S, Naaranlahti T, Kostiainen R, and Lapinjoki SP

Subjects
Structure-Activity Relationship, Yohimbine analogs & derivatives, Yohimbine analysis, Alkaloids analysis, Chromatography, High Pressure Liquid, Indoles analysis, Mass Spectrometry, Plants analysis, Secologanin Tryptamine Alkaloids
Abstract

Fragmentation of protonated molecular ions produced from catharanthine, tabersonine, ajmalicine and serpentine in a high-performance liquid chromatography (HPLC) thermospray ion source was studied. Collision-induced dissociation (CID) of the compounds was achieved by merely increasing the repeller potential; i.e. no discharge current was applied and filament was not on. Proportion of fragments to the protonated molecular ions increased with the potential at the 180-350 V range studied, but overall yield of detected ions decreased at the higher voltages in all cases. Comparison of fragments produced in the thermospray CID with those derived from the protonated molecular ions by colliding with argon in a triple-stage quadrupole instrument showed that the fragmentation is very similar in both cases. An analytical application for identifying the alkaloids from plant cell culture material by HPLC/mass spectrometry using the thermospray CID is described.

Published
1990
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3. Ganglion blocking effect of indole alkaloids contained in Uncaria genus and Amsonia genus and related synthetic compounds on the rat superior cervical ganglion in situ.

Author

Harada M, Ozaki Y, and Sato M

Subjects
Action Potentials drug effects, Alkaloids administration & dosage, Animals, Female, Ganglionic Blockers administration & dosage, Hexamethonium Compounds pharmacology, Indoles administration & dosage, Injections, Intra-Arterial, Injections, Intravenous, Male, Plant Extracts administration & dosage, Plant Extracts pharmacology, Rats, Alkaloids pharmacology, Ganglia, Spinal drug effects, Ganglionic Blockers pharmacology, Indoles pharmacology, Plants analysis
Published
1974
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4. Tertiary indole alkaloids from fruits of Tabernaemontana dichotoma.

Author

Perera P, Sandberg F, van Beek TA, and Verpoorte R

Subjects
Alkaloids pharmacology, Animals, Chemical Phenomena, Chemistry, Physical, Convulsants, Guinea Pigs, In Vitro Techniques, Indoles pharmacology, Mice, Parasympatholytics, Alkaloids isolation & purification, Indoles isolation & purification, Plants analysis
Published
1984
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7. The quantitative determination of some mitragyna oxindole alkaloids after separation by thin-layer chromatography. IV. Comparison of ultra-violet spectrophotometry, colorimetry and densitometry as methods for the quantitative determination of oxindole alkaloids in plant material.

Author

Shellard EJ and Alam MZ

Subjects
Chromatography, Thin Layer, Colorimetry, Densitometry, Methods, Plants analysis, Spectrophotometry, Ultraviolet Rays, Alkaloids analysis, Indoles analysis
Published
1968
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