(n.) A common metal of a reddish color, both ductile and malleable, and very tenacious. It is one of the best conductors of heat and electricity. Symbol Cu. Atomic weight 63.3. It is one of the most useful metals in itself, and also in its alloys, brass and bronze.
(n.) A coin made of copper; a penny, cent, or other minor coin of copper.
(n.) A vessel, especially a large boiler, made of copper.
(n.) the boilers in the galley for cooking; as, a ship's coppers.
(v. t.) To cover or coat with copper; to sheathe with sheets of copper; as, to copper a ship.
Example Sentences:
(1) This result was confirmed by atomic absorption spectroscopy, which indicated a stoicheiometry for copper and manganese of approx.
(2) Serum copper concentration also was measured in dams and kids in a control herd that had no history of ataxia.
(3) Copper therapy was applied to 7-day-old mutant mice.
(4) Several derivatives and analogs of the recently reported antiproliferative and antitumor agent trans-bis(salicylaldoximato)copper(II) (CuSAO2) have been prepared and tested for antiproliferative activity against L1210 leukemia cells in vitro.
(5) Accumulation of copper was not detected in the brain or small intestines of LEC rats until 13 mo.
(6) The potential use of ancrod, a purified isolate from the venom of the Malaysian pit viper, Agkistrodon rhodostoma, in decreasing the frequency of cyclic flow variations in severely stenosed canine coronary arteries and causing thrombolysis of an acute coronary thrombus induced by a copper coil was evaluated.
(7) The affinity of haFGF for copper was also confirmed to be higher than that of hbFGF using a copper affinity HPLC column.
(8) In the present study, maternal and fetal zinc (Zn), copper (Cu), manganese (Mn), iron (Fe), magnesium (Mg), and calcium (Ca) status has been studied in Sprague-Dawley (SD) and Wistar rats.
(9) This study provides evidence for a maternal yolk factor associated with increased tolerance and resistance of larvae to copper.
(10) With copper-ion catalysis, ligands inhibit competitively.
(11) No decisive numerical criterion was found that could be used to separate normal from abnormal copper concentrations because of this continuous array.
(12) No clear population trends were seen in dental disease incidence except for cemental caries which were found among Copper and Bronze Age remains.
(13) At 2 months of age there were no major differences in growth or health detected in infants fed the different copper intakes.
(14) In order to determine the specific action of cadmium on bone metabolism, the effect of cadmium on alkaline phosphatase activity, a marker enzyme of osteoblasts, was compared with that of other divalent heavy metal ions, i.e., zinc, manganese, lead, copper, nickel and mercury (10 microM each), using cloned osteoblast-like cells, MC3T3-E1.
(15) However, two observations suggested that surface epithelial loss alone was not sufficient to trigger the proliferative response to DOC: intracolonic instillation of DOC followed by removal of the DOC solution at 1 h, at which time surface epithelial loss was maximal, did not result in an increase in ornithine decarboxylase activity or [3H]dThd incorporation into DNA when these parameters were assessed at 4 h or 12 to 48 h, respectively; phenidone, an antioxidant and radical scavenger, and bis[(3,5-diisopropyl-salicylato) (O,O) copper(II), a lipophilic agent with superoxide dismutase activity, abolished the DOC mediated proliferative response but did not prevent the early loss of surface cells.
(16) Retinal changes should be reversible by short term systemic copper administration.
(17) Wilson disease is due to a genetically determined impairment of copper excretion from liver into bile resulting in copper overload of the organism.
(18) Arachidonic acid was also increased in plasma and liver phospholipids in low copper rats.
(19) These results suggest that HVE cells are more susceptible to concentration-dependent copper cytotoxicity than HAIN-55 cells are, and that copper could induce vascular endothelial injury, which may be involved in the pathogenesis of cardiovascular disease.
(20) Cadmium and copper content was determined by atomic absorption spectrophotometry from four tissue types; young blade, old blade, young stipe and old stipe.
Nickel
Definition:
(n.) A bright silver-white metallic element. It is of the iron group, and is hard, malleable, and ductile. It occurs combined with sulphur in millerite, with arsenic in the mineral niccolite, and with arsenic and sulphur in nickel glance. Symbol Ni. Atomic weight 58.6.
(n.) A small coin made of or containing nickel; esp., a five-cent piece.
Example Sentences:
(1) The effect of airborne pollution, especially nickel, from Kola has been studied in 10,612 persons who participated in a cardiovascular screening survey in Finnmark in 1974-75.
(2) In order to determine the specific action of cadmium on bone metabolism, the effect of cadmium on alkaline phosphatase activity, a marker enzyme of osteoblasts, was compared with that of other divalent heavy metal ions, i.e., zinc, manganese, lead, copper, nickel and mercury (10 microM each), using cloned osteoblast-like cells, MC3T3-E1.
(3) You could understand why the Met was frantic to find who had stabbed Rachel Nickell 49 times on Wimbledon Common while her screaming child looked on, but the case against Stagg was preposterous.
(4) The uptake of nickel ions by the cyanobacterium Anabaena cylindrica was studied.
(5) Nickel induced considerable increases in both glucose and glucagon levels, delayed in 19-day pregnant rats with respect to controls, and deep and permanent decreases in glycogen and amino acids in pregnant rats.
(6) The male:female prevalence of nickel allergy was 1:2 (sex difference p less than 0.001) and for chromate was 7:1 (sex difference p less than 0.001).
(7) These results suggest that nickel is unable to induce basepair or frameshift mutations in Salmonella tester strains and are discussed in relationship to the low binding affinity of Ni(II) for DNA.
(8) Titanium-nickel alloy composed of 50% by weight of each metal has unique thermal shape-memory properties, with a transition temperature of 20 degrees C. Each stent consists of one wire with a diameter of 0.9 mm.
(9) The effect of calcium(II)acetate (CaAcet) and magnesium(II) acetate (MgAcet) on nickel(II) uptake in the lungs of strain A mice and on the nickel(II)-induced changes in the pulmonary DNA synthesis were studied in order to elucidate the mechanism(s) of inhibitory action of CaAcet and MgAcet upon nickel(II) tumorigenesis.
(10) To determine cell-mediated immunity to nickel, another matrix in hard metal besides cobalt, lymphocyte transformation tests (LTT) with nickel were carried out in seven hard metal asthma patients all of who had reacted to cobalt chloride in the bronchial provocation tests (BPT).
(11) The results showed that nickel exposure led significantly to raised nickel concentration in nasal mucosa, plasma and urine both in active and retired nickel workers.
(12) Base metal alloys, principally made of nickel, chromium, and beryllium have gained widespread usage, especially in the United States, due to their lower cost and higher mechanical properties.
(13) An empirical power absorption formula developed by Haider for thermally self-regulating nickel-silicon ferromagnetic seeds has been used to calculate the seed power absorption as a function of seed temperature.
(14) The crystalline nickel sulfides and oxides that slowly dissolve in body fluids and readily enter cells by phagocytosis tend to be most active in producing morphological transformation of SHE cells in vitro and stimulating erythrocytosis and carcinogenesis following ir administration to rats.
(15) The nickel-titanium wires, however, showed a clear deviation form the linearity with a curviform course.
(16) After 3 and 6 months exposure to metallic nickel the macrophages were 'overfed' and inactive.
(17) Nickel deficiency was produced in chicks under near optimal growth conditions.
(18) However, nickel also induces a direct decrease in the release of lysozyme activity by AM.
(19) The hyperglycaemic response to nickel of female rats was more marked than that of males, with an increase in intracellular glucose, more marked during pregnancy, which even surpassed the plasma concentration of glucose.
(20) A nickel subsulfide (Ni3S2) lung tumor model for the study of metal carcinogenesis was evaluated using intratracheally dosed B6C3F1 mice.