Примери за alkaloid

• In many leaves, alkaloid concentrations range from 100 to 500 g g-1 fresh weight.

• Most of the alkaloids and flavonoids are present in the flowers and in the ripe fruits.

• The administered doses of alkaloid and flavonoid fractions correspond to the proportion of these components in the crude extract used in the experiment.

• Coffee plants contain alkaloid compounds that discourage herbivory.

• This equation was also used to quantify consumption of saponins, cyanogenic glycosides and alkaloids.

• A colour change from white to orange indicates presence of alkaloid or related amines.

• No differences were detected between lipid-poor and -rich seasons in levels of alkaloids, fibre or saponins.

• It is not known whether disproportionately higher levels of alkaloids in other tissues, principally the phloem, contribute to this aphid resistance.

• Table 3 shows the binding capacities of the soils from data set 1 for four alkaloids.

• However, there is a difference because unexpectedly no changes in enzyme activity of cauda treated with crude and alkaloid extracts were noticeable.

• 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.

• 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.

• There were no alkaloids or triterpenes.

• 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.

• The working party on naturally occurring toxicants in food has completed its study of pyrrolizidine alkaloids in milk.