| Part of Speech | Definition | |
| Noun | 1. Annual sunflower grown for silage and for its seeds which are a source of oil; common throughout United States and much of North America.[Wordnet]. | |
Source: WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | Top | |
Common Expressions: Helianthus annuus
| Expressions | Definition | ||
| Helianthus annuus | Annual sunflower grown for silage and for its seeds which are a source of oil; common throughout United States and much of North America. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
Source: compiled by the editor from various references; see credits. | Top | ||
Specialty Expressions: Helianthus annuus
| Expressions | Domain | Definition | |
| Helianthus annuus | Aerospace | Sunflower causes allergic contact dermatitis in sensitive individuals after contact with the sesquiterpene lactones contained in fragile, multicellular, capitate glandular hairs (Hausen and Spring 1989). Cattle have been poisoned in Europe after ingesting plants that did not have mature seeds. This is a result of nitrate toxicity, which has caused sickness and death (Cooper and Johnson 1984). Sunflower contains several sesquiterpene lactones, including the most active chemical, 1-O-methyl-4,5-dihydroniveusin A, in the hemiketal form. The complete mixture of sesquiterpene lactones contributes to the allergic response in humans. These chemicals are found in the capitate glands on sunflower leaves (Hausen and Spring 1989). Sunflowers can also accumulate toxic amounts of nitrates, which have poisoned cattle in Europe (Cooper and Johnson 1984). Cattle that ingest sunflower plants that have not formed mature seeds develop nitrate poisoning. Symptoms include circulatory failure, swaying of hind quarters, excitation, and collapse 1-3 h after ingestion. Postmortem findings include lung edema, small hemorrhages and congestion of intestinal blood vessels, and dark-colored blood (Cooper and Johnson 1984). General symptoms of poisoning: 1- Cattle: a- agitation; b- collapse; c- death; and d- lungs, congestion of; and 2- Humans: a- eczema; and b- erythema. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
