An Abnormal Bract-Modification in Cotton
نویسندگان
چکیده
منابع مشابه
Airway constrictor response to cotton bract extracts in the absence of endotoxin.
Crude and purified aqueous extracts of cotton bracts shown to cause airway constriction in naive subjects were assayed for endotoxin content. Pulmonary function measured by flow changes on partial expiratory flow volume curves was used to assess airway responses to the bract extracts after their inhalation by a panel of volunteers. These responses are similar to the acute responses experienced ...
متن کاملBiologic activity of purified cotton bract extracts in man and guinea pig.
Purified aqueous extracts of cotton bract induce acute airway constriction in healthy volunteers never before exposed to cotton bract. The response is similar to that of textile workers who inhale cotton dust. Approximately 60% of volunteers respond to bract extract with significant decreases in lung function, and these volunteers show an increased number of lymphocytes present in their lungs. ...
متن کاملModification of the GRAMI Model for Cotton
duction. The model was developed and verified using field data from irrigated commercial cotton fields in the A new version of the GRAMI crop model capable of being caliTexas High Plains, USA. The model was validated using brated within season was developed and tested for cotton (Gossypium field data from independent sites in this region, and its hirsutum L.) production in semiarid regions. The...
متن کاملRelationship of the ventilatory response to cotton bract extract and the cells and proteins of the lung.
Many healthy subjects who have had no exposure to cotton textile dusts will experience significant reductions in expired flow rate following an inhalational challenge with an aqueous extract of cotton bracts (CBE). Differences noted among individuals in the magnitude of the bronchial response to a standardized preparation of CBE suggest variable airway reactivity. The mechanism of this response...
متن کاملAn overview of species differences in the effects of a water extract of cotton bract on isolated airway smooth muscle, and effects of E. coli lipopolysaccharide.
Our laboratory has been comparing the activity of a water extract of cotton bract (CBE) with the isolated trachealis smooth muscle of the dog, guinea pig, and cat. CBE induced contractions that were not mediated by 5-hydroxytryptamine (5-HT), histamine, or muscarinic receptors. The active agent(s) in CBE was dialyzable (less than 14,000 molecular weight), and substantial activity was retained a...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1910
ISSN: 0006-8071
DOI: 10.1086/330178