(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.
Lemma
Definition:
(n.) A preliminary or auxiliary proposition demonstrated or accepted for immediate use in the demonstration of some other proposition, as in mathematics or logic.
Example Sentences:
(1) These partitions shunt additional protein into the cell, where ferritin is transported within pinocytotic vesicles to the lateral and basal plasma-lemma and, presumably, back into the interspace again.
(2) Solome Lemma, co-founder of the grassroots response initiative Africa Responds, said she was disappointed Geldof hadn’t worked with African artists: “There’s a multitude of artists from the three most affected countries – Liberia, Sierra Leone and Guinea – and the rest of Africa he could have brought on to do a different song.
(3) The energetic consequences of acute and chronic adjustments of two primary-active transport processes, Na-K transport across plasma(sarco) lemma and Ca transport across the endo(sarco)plasmic-reticular membrane, are illustrated.
(4) Most of the tumour cells were elongate, and contained abundant rough endoplasmic reticulum, well developed Golgi zones, and numerous small vesicles and filaments, the latter sometimes being related to masses of electron-dense material near the plasma-lemma.
(5) The first Band Aid did raise money, but it left Ethiopia and the rest of Africa with a very negative legacy, that survives to this day.” Lemma was born in Ethiopia and moved to the US when she was 12 in the early 1990s.
(6) This result suggests that the effects of BWSV on the nerve terminal may not be confined to increasing the permeability of the plasma-lemma.
(7) Unlike albumin-gold complexes that bind restrictively to plasmalemmal vesicles, gA-Au labels the plasma-lemma proper, plasmalemmal vesicles open on the lumen, and most coated pits.
(8) This paper presents a spreading-activation theory of conceptually driven lemma retrieval--the first stage of lexical access in speaking, where lexical items specified with respect to meaning and syntactic properties are activated and selected.
(9) While healthy elderly Ss (in the 70s group) utilized lemma repairs more often than the reformulation strategy, all other healthy Ss used both strategies about equally often.
(10) Solome Lemma is co-founder and executive director of Africans in the Diaspora (Aid) .
(11) A lemma with sufficient conditions for continuity and differentiation of the median regression function is proved.
(12) Their basal plasma lemma showed presence of caveolae and the luminal surface was studded with stereocilis.
(13) Hooked macrohairs on the lemma of the spikelet show that morphological modifications in grasses for dispersal by attachment to the surface of animals were present in the Late Eocene.
(14) The mental lexicon is conceived of as a network consisting of concept, lemma, and word-form nodes and labelled links, with each lexical concept represented as an independent node.
(15) Solome Lemma, co-founder of Africans in the Diaspora and the Africa Responds initiative on Ebola, a fundraising effort to support local organisations working on the issue , said it was commendable that Geldof was helping with the Ebola response, but questioned the initiative’s “patronising” style.
(16) These results demonstrate that polymers prevent exocytosis by preventing dispersal of the granule contents once fusion of the secretory granule with the plasma-lemma has occurred.
(17) The emerging theoretical picture partitions the accessing process into two subprocesses, the selection of an appropriate lexical item (a "lemma") from the mental lexicon, and the phonological encoding of that item, that is, the computation of a phonetic program for the item in the context of utterance.
(18) Preliminary EM investigations revealed thick and thin filaments, associated with the ectoplasmic tube near the plasma-lemma, which appeared to be the basis for the contractility of the ectoplasmic tube.
(19) Two major bleb types have been discerned on ultrastructural appearance using as the criteria the preservation of integrity of the plasma-lemma and subplasmalemmal leptomeres.
(20) Processing models that use the activation metaphor may have difficulties accounting for certain phenomena where a certain lemma triggers not one, but two or more word forms that have to be produced with other word forms in between.