| 词汇 | example_english_alkaloid |
| 释义 | Examples of alkaloidThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. 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. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Data on pyrrolizidine alkaloids in the herbal remedy comfrey have already been published. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 There is no ban on comfrey products generally, but those likely to contain the highest concentration of toxic alkaloids have been withdrawn from the market. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 A particular concern was the very high levels of pyrrolizidine alkaloids generally present when comfrey is presented in concentrated form. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Pyrrolizidine alkaloids were not detected in any of the milk samples taken. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Attention is being devoted to the possible carcinogeneity of alkaloids present in tobacco or in tobacco smoke. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 That proved conclusively that the honey contained pyrrolizidine alkaloids. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 A project to study the metabolism of pyrrolizidine alkaloids found in herbal ingredients has recently commenced and is due for completion in 1995. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Potatoes, aubergines, green and red peppers and green tomatoes contain glyco alkaloids. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Ragwort contains pyrrolizidine alkaloids, the best known being jacobine, jacodine and jaconine. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 All these cases are linked to the consumption of plants, including comfrey, which contain the toxic pyrrolizidine alkaloids. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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