(n.) A leaf, usually smaller than the true leaves of a plant, from the axil of which a flower stalk arises.
(n.) Any modified leaf, or scale, on a flower stalk or at the base of a flower.
Example Sentences:
(1) Enterobacter agglomerans was the most predominant bacterium on leaf and bract.
(2) Field-dried cotton bract, a contaminant of cotton dust, has been implicated in byssinosis pathogenesis.
(3) Cotton bract tannin is a potent stimulus for platelet aggregation and secretion.
(4) Byssinosis, COPD, cotton fever and cotton pneumoconiosis may be different types of responses due to the different duration of exposure, the different parts of bronchial tree (upper respiratory tract, small airway, and respiratory part) where deposition occurs, and the different components of cotton dust (broken cotton fibers, bracts, pericarps, bacteria, and fungi).
(5) Comparison of the cytotoxicity dose curves for aqueous bracts extracts with those for tannin demonstrated that tannin was the major cytotoxin present in bracts.
(6) Bract is the most abundant component in respirable raw cotton dust.
(7) After clearing and removal of the cuticle, the bracts are bleached, washed, dehydrated, and if studied by light microscopy, stained in 2% chlorazol black E and mounted in Diaphane; or, if studied by scanning electron microscopy, dried by the critical-point method and either left uncoated or coated with a film of various conductive metals.
(8) The human T lymphocyte proliferative response to cotton bract tannin was shown to be dependent upon the presence of monocytes.
(9) 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.
(10) The content of bract was unaffected by this harvest-aid practice.
(11) Raw cotton from 4 machine picked varieties and 2 machine stripped varieties is examined by stereomicroscope and bright-field microscopy for presence of plant trash(bract, leaf, stem, seed, boll, and weed fragments-size range 841-2000mum) that gives rise to cotton dust during yarn manufacturing operations.
(12) The effects of a water extract of cotton bracts (CBE) on guinea pig isolated trachealis smooth muscle was studied.
(13) The authors established an in vitro cytotoxicity assay using 51Cr release to assess time- and dose-dependent toxicity of condensed tannin, a component of bracts, on porcine aortic and pulmonary arterial endothelial cells.
(14) Senescence affected the population levels of the various genera on leaf and bract.
(15) The provenance of bristles and bracts suggests that the bristle cells move into their final positions.
(16) Mill workers are exposed to bract which has weathered in the field, but it is not known whether biologic effects of bract are due to intrinsic plant compound(s) or to contamination occurring during field weathering.
(17) To determine if constituents of cotton plants might play a role in byssinosis by injuring pulmonary epithelium, we added extracts of cotton dust, green bract, and field-dried bract to human A549 and rat type II pneumocytes.
(18) Macrophages obtained by bronchoalveolar lavage from volunteers pre-challenged with bract extract release increased amounts of chemotactic factor and superoxide anion.
(19) The role of nonspecific reactivity of the airways in this reaction to cotton bract extract is undefined.
(20) Extracts of cotton dust and field-dried bract produced significant dose- and time-dependent lysis and detachment of both target cells, while green bract extract was less damaging.
Inflorescence
Definition:
(n.) A flowering; the putting forth and unfolding of blossoms.
(n.) The mode of flowering, or the general arrangement and disposition of the flowers with reference to the axis, and to each other.
(n.) An axis on which all the flower buds.
Example Sentences:
(1) Powdered slaked lime applied to the chewed Areca nut with Piper betle inflorescence at the corner of the mouth causes the mean pH to rise to 10, at which reactive oxygen species are generated from betel quid ingredients in vitro.
(2) Arabidopsis flowers develop from groups of undifferentiated cells on the flank of an inflorescence meristem.
(3) The content of heparin-binding complexes amounted to about 20% of the total DNA quantity and 60 to 80% of nitrocellulose-retained DNA, being similar in preparations of DNA from calf thymus, chicken erythrocytes and cauliflower inflorescence.
(4) Poly(A)+ RNA was obtained from inflorescences and was shown to be able to code in vitro for a protein homologous to Par o I with respect to sodium dodecylsulphate polyacrylamide gel electrophoretic mobility and to antigenic specificity as defined by the binding, in affinity chromatography, to solid-phase IgG of rabbit anti-Par o I antisera, and in RAST inhibition, to IgE antibodies of human reaginic serum pool.
(5) The distribution of allergenic proteins was investigated in various tissues of white birch, Betula verrucosa (pollen, leaves and male inflorescences containing immature pollen).
(6) Although necessary for shaping a normal racemose inflorescence, the squa function is not absolutely essential for flower development.
(7) Artemisia annua L. contains artemisinin, an endoperoxide sesquiterpene lactone, mainly in its leaves and inflorescences.
(8) The first step in flower development is the transition of an inflorescence meristem into a floral meristem.
(9) No Bet v I could be extracted from immature male inflorescences.
(10) This was also true when comparing extracts of immature and fruiting inflorescences.
(11) The procedure established that macerated leaf sheath or pith from inflorescence stem placed either in a liquid medium or on a corn meal-malt extract agar medium produced isolated mycelium and characteristic conidia within a 3- to 3.5-week period.
(12) It has been determined that the thromboplastic agents from the inflorescence of the birch Betula pendula Roth, blossoms of the willow Salix daphnoides Vill., seeds of the pea Pisum sativum L. provoke protective reaction of the animal's anticoagulation system, though weaker expressed than the reaction of thromboplastin from brain.
(13) From fresh and dried herb (without inflorescences) of Anthemis nobilis L. a new sesquiterpene lactone C20H26O6 was isolated.
(14) The chemicals or their mixtures were either (1) mixed into soil, and chemical exposure to the target cells was through the roots of intact plants grown in the soil or (2) through plant cuttings in which the inflorescences received treatment by absorption through stem of an aqueous solution of the test chemicals.
(15) The aqueous extract of inflorescences of Parietaria judaica contains an allergen homologous to the major pollen allergen Par o I (14 kD), as shown by radio-allergosorbent test (RAST) inhibition and immunoblot analysis.
(16) The essential oil was extracted from the inflorescences of Rhaponticum uniflorum which are used as a Mongolian drug.
(17) The zoospores showed taxis towards the tissues surrounding the inflorescence of Lolium perenne L. in the rumen, invading principally the stomata and damaged tissues.
(18) Comparing the products of in vitro translation from mRNA preparations of mature pollen and of male inflorescences collected in June, October and February, little seasonal variations could be observed.
(19) We show that LEAFY interacts with another floral control gene, APETALA1, to promote the transition from inflorescence to floral meristem.
(20) Thick proximally unbranched dendrites with terminal arborizations and varicose inflorescences in the form of a basket are stained with the Golgi method.