(n.) An elongated fish of many genera and species. The common eels of Europe and America belong to the genus Anguilla. The electrical eel is a species of Gymnotus. The so called vinegar eel is a minute nematode worm. See Conger eel, Electric eel, and Gymnotus.
Example Sentences:
(1) When incubated in FW, water entry was greater in SW-adapted eels than in FW-adapted eels.
(2) Interpretation of the results shows that the ovary of the European eel contains the following enzymes: a 3 beta-hydroxysteroid dehydrogenase, 5----4-ene-isomerase complex, a 17 alpha-hydroxylase, a C21-C19 desmolase, a 17 beta-hydroxysteroid oxidoreductase, a 5 alpha-reductase, a 3 beta-hydroxysteroid oxidoreductase and an aromatase complex.
(3) Digests of neuropeptides using purified eel AChE or bovine pancreatic trypsin gave identical peptide maps.
(4) As a first step in studying the molecular mechanisms involved in this stimulation, we cloned and characterized the cDNA encoding the beta subunit of eel GTH-II.
(5) This includes the analysis of the transfer characteristics of the image detection system, the use of laser-induced fiducials for deformation correction and alignment, the control of section thickness by EELS and the use of ESI to image thick sections.
(6) Cutaneous oxygen consumption and oxygen uptake from the external medium were investigated in three species of freshwater teleosts:eel(Anguilla anguilla L.)(silvered stage), trout (Salmo gairdnerii R.) and tench (Tinca tinca L.).
(7) "Our study shows the potential benefit of putting prostate cancer on a par with cancers such as breast cancer when it comes to genetic testing," said study co-leader Ros Eeles, professor of oncogenics at the Institute of Cancer Research and honorary consultant at the Royal Marsden NHS Foundation Trust.
(8) Ester hydrolysis by acetylcholinesterase (from electric eel, Electrophorus electricus) increased in the presence of low concentrations (ca 10(-7) M) of edrophonium, propidium, d-tubocurarine, gallamine, decamethonium or bis-N-methylacridinium, and decreased at higher concentrations.
(9) Kallidin but not BK and des-Arg9-BK contracted eel intestine.
(10) Sequence identities of sea turtle GH to other species of GH are 89% with chicken GH, 79% with rat GH, 68% with blue shark GH, 58% with eel GH, 59% with human GH, and 40% with a teleostean GH such as chum salmon.
(11) Gonadotrophs (GTH cells), small and scarcely visible in the pituitary of control eels, are hypertrophied and contain numerous glycoprotein granules after E2-administration.
(12) This peptide, termed eel atrial natriuretic peptide (ANP), has sequence homology of 59% to mammalian (human or rat) ANP, 52% to fowl ANP, and 46% to frog ANP.
(13) Six N-alkyl and N-aryl 5-(1,3,3-trimethylindolinyl) carbamates were synthesized and studied for their structure-activity relationships in inhibiting eel acetylcholinesterase (AChE).
(14) In order to verify this hypothesis, electron energy-loss spectroscopy (EELS) has been used to compare the P content in control and ADR-treated erythrocyte ghosts.
(15) A radioimmunoassay for chicken calcitonin in chicken ultimobranchial glands was established utilizing a rabbit antiserum against eel calcitonin.
(16) Viscera (48.3 kg) from moray eels (Lycodontis javanicus) collected in a ciguatera endemic area were extracted and the ciguatoxins characterized.
(17) Nine selected EELs were classified in three clusters of increasing degrees of seriousness of health effects.
(18) Examples include monitorings of the rate of hydrolysis of acetylthiocholine iodide by eel acetylcholinesterase and the rate of hydrolysis of malathion and nonconventional esters such as O-methyl, O-ethyl, and O-isobutyl carbonates of p-nitrophenol by commercial porcine liver carboxylesterase.
(19) The geographic distribution pattern points to the existence of areas around the globe in which flatfish or eels are able to develop skin papillomas.
(20) Incidence of lethal bends and intravascular bubbles has been studied in the eel (Anguilla anguila L.) submitted to hyperbaric air decompressions at temperatures of 17 and 27 degrees C. The fish was an accurate model to seek the nature of the inert gas transport limiting process (diffusion or perfusion) because an increase in temperature considerably influences the rate of perfusion whereas the properties of gases vary in relatively lower proportions.
Narwhal
Definition:
(n.) An arctic cetacean (Monodon monocerous), about twenty feet long. The male usually has one long, twisted, pointed canine tooth, or tusk projecting forward from the upper jaw like a horn, whence it is called also sea unicorn, unicorn fish, and unicorn whale. Sometimes two horns are developed, side by side.
Example Sentences:
(1) Documents seen by the Guardian show that Mittal's company, the world's biggest steel-making group, ArcelorMittal , admits the operations will be undertaken in an area inhabited by unique wildlife including polar bear, narwhal and walrus.
(2) The evolution of the component was studied after sequencing the component in different odontocetes representing the Delphinidae (delphinids), Monodontidae (narwhals), and Ziphiidae (beaked whales).
(3) As sea ice melts, the bowhead whale and the narwhal will lose protective cover, while other species such as the ringed seal will struggle to breed.
(4) "Ned was stalking me, baiting me, hunting me, much as he was the demon narwhal, albeit with more subtlety than force.
(5) Values for Young's modulus of elasticity, ultimate and yield stresses, ultimate and yield strains, work under the stress-strain curve and work of fracture were obtained from tensile and bending tests on specimens of narwhal tusk dentine and cement, femoral bone from young and mature cattle, and reindeer antler.
(6) In general, the mechanical properties of the narwhal tusk tissues were as would be expected from their mineral content, except that the stiffness of the cementum was low.
(7) The statement outlines how marine mammals are also found in abundance in the region including polar bears, narwhals, beluga whales and blowhead whales while migratory birds include snow geese, rough-legged hawks and gyro-falcons.
(8) Narwhal (Monodon monoceros) liver and kidney cytosol were fractionated by gel chromatography, anion-exchange chromatography and electrophoresis.
(9) The narwhal dentine was considerably softer and less mineralized than human and cattle dentine.
(10) Remarkably high cadmium levels are found in kidney and liver of narwhal (Monodons monoceros) from western Baffin Bay (mean of 63.5 micrograms g-1) and western Greenland waters (median of 39.5 micrograms g-1).
(11) It is likely that narwhal dentine is not very similar to human and cattle dentine in its mechanical properties.
(12) Compared with the cattle bone the narwhal tissues had low Young's moduli, low yield stresses, rather low ultimate stresses and high ultimate strains.
(13) Human cementum was softer and less mineralized than cattle cementum, and was like narwhal cementum.
(14) The calcium content and hardness of the narwhal tissues were compared with those of human and cattle dental tissues.