0 a type of chemical found in plants that often acts as a drug or poison, or is used in medicines: --
The working party on naturally occurring toxicants in food has completed its study of pyrrolizidine alkaloids in milk.
The crude extract was obtained from plants collected at the beginning of the vegetative cycle, when they contained 0.095 g alkaloids and 1.50 g flavonoids per 100 g dry plant.
There were no alkaloids or triterpenes.
All the ergot alkaloids increase the motor activity of the uterus, by producing persistent contractions in the inner zone of myometrium through a calcium channel mechanism.
The toxin adsorption capacities of soils in the first sample set were determined by capillary gas liquid chromatography using the alkaloids lupanine, sparteine, quinine and atropine.
However, there is a difference because unexpectedly no changes in enzyme activity of cauda treated with crude and alkaloid extracts were noticeable.
Table 3 shows the binding capacities of the soils from data set 1 for four alkaloids.
It is not known whether disproportionately higher levels of alkaloids in other tissues, principally the phloem, contribute to this aphid resistance.
