(v. i.) To drop the head or person suddenly; to bow.
(n.) A pet; a darling.
(n.) A linen (or sometimes cotton) fabric, finer and lighter than canvas, -- used for the lighter sails of vessels, the sacking of beds, and sometimes for men's clothing.
(n.) The light clothes worn by sailors in hot climates.
(v. t.) To thrust or plunge under water or other liquid and suddenly withdraw.
(v. t.) To plunge the head of under water, immediately withdrawing it; as, duck the boy.
(v. t.) To bow; to bob down; to move quickly with a downward motion.
(v. i.) To go under the surface of water and immediately reappear; to dive; to plunge the head in water or other liquid; to dip.
(v. t.) Any bird of the subfamily Anatinae, family Anatidae.
(v. t.) A sudden inclination of the bead or dropping of the person, resembling the motion of a duck in water.
Example Sentences:
(1) The move was confirmed by a Lib Dem aide, who said Tory claims to be green were "already a lame duck and are now dead in the water".
(2) The temperature of the anterior and middle hypothalamus of conscious Pekin ducks was altered with chronically implanted thermodes.
(3) Previous studies in the rat, mouse and duck had suggested that agents present in cigarette smoke might induce a cytochrome P450-mediated detoxication pathway, leading to protection against aflatoxin-induced primary liver cancer.
(4) Prolactin plasma concentrations decreased rapidly at the end of incubation in ducks which successfully hatched young as well as in unsuccessful incubators.
(5) From ducks A. laidlawii, M. anatis and various unclassified strains were isolated, among these M. anatis and unclassified arginine splitting mycoplasma strains proved to be pathogenic.
(6) The early phases of hepadnaviral infection were studied in primary duck hepatocyte cultures.
(7) In intact ducks changes in blood flow were recorded as changes in digital subcutaneous tissue temperature.
(8) But on Sunday night it was hard to duck the euphoria.
(9) In the Commons on Monday , John Whittingdale, the culture secretary who only in February chaired the committee that concluded “No future licence fee negotiations must be conducted in the way of the 2010 settlement”, ducked the invitation to explain how exactly the same thing had just happened again.
(10) He was never an intellectual; at Oxford, he did no work, and was proudest of playing squash and cricket for the university, though against Cambridge at Lord's he failed to take a wicket and made a duck.
(11) Adult mallard ducks fed 0, 2, 20, or 200 ppm of cadmium chloride in the diet were sacrificed at 30-day intervals and tissues were analyzed for cadmium.
(12) Typical herpesviral capsids and virions were seen in negatively-stained preparations of duck embryo fibroblasts.
(13) To study the effect of air sac pressures, a controllable pressure difference was produced between the air sac orifices of fixed duck lungs.
(14) Images of dead ducks in oil sands tailings pond have been plastered on billboards in Denver, Portland, Seattle and Minneapolis.
(15) You cannot now duck the fact that we have an electoral system which is completely out of step with the aspirations and hopes of millions of British people," he said.
(16) Three Newcastle disease viruses (NDV) isolated from wild ducks in Japan were evaluated for their biological activities, pathogenicity and immunogenicity against one-day-old chickens.
(17) With these synthetic peptides, radioimmunoassay systems for dog, rat, and duck C-peptides were developed.
(18) On the basis of the antiviral action of sulfated polyanions in human immunodeficiency virus and other viral infections, we studied the effect of dextran sulfate and heparin on duck hepatitis B virus infection.
(19) The (Na+ plus K+)-ATPase activities in salt gland homogenates increased 3- to 4-fold after saline treatment of ducks for 3 weeks.
(20) Compared with intact ducks, neither decerebration nor brain stem transection at the rostral mesencephalic (RM) level had any effect on development of diving bradycardia, or heart rate at the end of two-min dives.
Mallard
Definition:
(a.) A drake; the male of Anas boschas.
(a.) A large wild duck (Anas boschas) inhabiting both America and Europe. The domestic duck has descended from this species. Called also greenhead.
Example Sentences:
(1) Adult mallard ducks fed 0, 2, 20, or 200 ppm of cadmium chloride in the diet were sacrificed at 30-day intervals and tissues were analyzed for cadmium.
(2) One method consisted of examination of gizzards from mallards shot by hunters (n = 2,859) and the other method consisted of examination of gizzards from mallards caught in duck traps (n = 865).
(3) Generally metal levels were higher in the salt gland for mallard and black duck, and in the liver for greater scaup.
(4) Neonatal ducklings and chickens were tested for responsiveness to a pulsing pure tone that was as similar as possible to the mallard maternal alarm call.
(5) Twenty-four-hour-old mallard ducklings (Anas platyrhynchos) exhibit a high degree of behavioral freezing (i.e., vocal and locomotor inhibition) upon hearing the maternal alarm call, which the hen utters when potential predators are near the nest.
(6) By the end of August, shorter chain wax esters composed of C6 and C12 acids became the dominant components of the secretion and this composition, previously considered characteristic of mallards, remained constant until March.
(7) Artificially incubated mallard eggs were treated externally with 5 microliter of No.
(8) Mallard drakes accumulated mercury rapidly from dietary dosage of methylmercury dicyandiamide and eliminated it slowly, retaining approximately one half at the end of 84 days; no measurable loss occurred between the end of the 7th and 56th days, but loss resumed concurrently with new feather growth, and continued through the 112th day, the close of the study.
(9) Growth characteristics of the mallards on the other hand, did not differ between the sexes.
(10) The prevalence of influenza varied greatly among the common waterfowl species: mallards 42%, black ducks 30%, blue-winged teal 11%, wood ducks 2%, and Canada geese 0%.
(11) Mallard eggs collected in the wild have been found to contain levels of mercury exceeding the 1 ppm (wet-weight) found in the eggs of hens fed a diet containing 0.5 ppm, but there are no reports of mallard eggs collected in the wild that were found to contain as much mercury (6 to 9 ppm) as eggs from hens fed a diet containing 3 ppm mercury.
(12) In posthatching mallard ducks (Anas platyrhynchos), brain cooling improves with growth.
(13) The 1-24 ACTH-induced increases in B and Aldo synthesis by the mallard and Pekin duck cells exposed to the same range of concentrations were up to 40 and 60 times greater than the corresponding responses of the chicken cells.
(14) The rat mammary gland thioesterase II exhibits approximately 40% homology with a thioesterase from mallard uropygial gland, the sequence of which was recently determined by cDNA analysis [Poulose, A.J., Rogers, L., Cheesbrough, T. M., & Kolattukudy, P. E. (1985) J. Biol.
(15) Differences in the organization of the systems in pigeon and mallard are related to the differing degrees of visual and tactile (trigeminal) contributions to feeding in the two birds.
(16) Two of these, cutinase, a typical serine esterase from the fungus Fusarium solani pisi, and thioesterase B from the uropygial gland of the mallard duck Anus platyrhynchus, hydrolyzed diethylpyrocarbonate so rapidly that histidine modification could not be detected except when the enzymic activity was inhibited by diisopropylfluorophosphate treatment or by the presence of critical micellar concentrations of sodium dodecyl sulphate.
(17) Localization studies of the hypothalamohypophysial and tuberoinfundibular neurosecretory systems were performed in the adult male mallard duck with an immunoperoxidase techinque for the demonstration of neurophysin (NP) and gonado-tropin-releasing hormone (Gn-RH) and with aldehyde fuchsin for the staining of neuosecretory material (NSM).
(18) Plasma free fatty acid (FFA) levels were measured in the mallard duck (Anas platyrhynchos) following hypothalamic lesions at various sites.
(19) Mallards and black ducks from the Atlantic Flyway and mallards from the Pacific Flyway contained significantly lower DDE residues than in 1969-70.
(20) This was followed by two regions encoding ORF1 and ORF2 which were similar to each other (48% nucleotide identity, 31% amino acid identity), as well as to GrsT, a protein encoded by a gene located adjacent to gramicidin S synthetase in Bacillus brevis, and to vertebrate (mallard duck and rat) thioesterases.