What's the difference between metavanadate and vanadium?
Metavanadate
Definition:
(n.) A salt of metavanadic acid.
Example Sentences:
(1) Orthovanadate is a little less effective then metavanadate; vanadyl sulfate is even less efficient, and the effect of Cu2+ at the same concentration is still lower.
(2) Reduction of decavanadate, but not metavanadate, was obtained only in the presence of the plasma membrane enzyme system.
(3) The D-glucose uptake was also stimulated by metavanadate, but not by selenite, selenate, or molybdate.
(4) Although the absolute level of mutations was greater in these cells with ammonium metavanadate, so was the background, and these cells did not exhibit an enhanced mutagenic response to vanadate when compared to the wild-type V79 cells.
(5) Those solutions having a metavanadate:decavanadate ratio in the range of 1-5 showed maximum stimulation of NADH oxidation by rat liver plasma membranes.
(6) Various concentrations of ammonium metavanadate (AMV), vanadyl sulfate trihydrate (VST) and ortho sodium vanadate (OSV) were tested in a human tumor cloning assay (HTCA).
(7) administration of 0.16 mmol kg-1 sodium metavanadate: ascorbic acid, deferoxamine mesylate (DFOA) and 4,5-dihydroxy-1,3-benzene-disulphonic acid (Tiron).
(8) The substrate specificity of the semen acid phosphatase and its inhibition by tartrate, fluoride, metavanadate, molybdate and Hg2+ were also studied.
(9) For some substances (cadmium, bichromate, metavanadate, and bromide) individual growth (carapace length) was found to be a sensitive parameter.
(10) In our previous work, ammonium metavanadate (pentavalent form, V5) induced mitotic gene conversion and point reverse mutation in the D7 strain of yeast.
(11) Significant levels of ovulation were induced by 0.1 mM sodium chromate, 0.1 mM sodium metavanadate, 10 mM sodium molybdate, 0.1 mM sodium orthovanadate, 5 mM sodium selenate, 0.5 mM sodium tungstate, and 0.1 mM vanadyl sulfate.
(12) In the present investigation, the effects of oral administration of sodium metavanadate, sodium orthovanadate and vanadyl sulphate to alleviate some signs of diabetes in streptozotocin-treated rats have been evaluated.
(13) Because vanadate ion is a potent mitogen and accumulates in the gut of rodents fed vanadate supplements, effects of ammonium metavanadate in drinking water (10 ppm or 20 ppm) were studied on the development of large bowel neoplasms in mice treated with 1,2-dimethylhydrazine (DMH) (20 mg kg-1 weekly for 20 weeks).
(14) Metavanadate also lowered serum triglyceride and 3-hydroxybutyrate levels without lowering serum glucose in the diabetic rats.
(15) Male Wistar rats were treated in the period from conception up to the 105th day of age with 40 and 60 ppm of vanadium, given as sodium metavanadate in the drinking water.
(16) Lung collagen content in rats continuously exposed for two generations to 20 ppm vanadium as sodium metavanadate drinking solution was quantified by measurement of hydroxyproline in hydrolysates of whole lungs.
(17) Addition of increasing concentrations of decavanadate to metavanadate and vice versa increased the stimulatory activity, reaching a maximum when the metavanadate:decavanadate ratio was in the range of 1-5.
(18) In addition, the effect of ammonium metavanadate on the hepatic monooxygenase system was studied in mice by measuring the level of cytochrome P450 and determining the activities of aminopyrine N-demethylase, p-nitroanisole O-demethylase and 7-ethoxycoumarin O-deethylase in mouse liver microsomal fraction.
(19) Metavanadate, however, competitively inhibits chromate influx at equimolar concentrations.
(20) On the other hand, cadmium(II), beryllium(II), chromate(VI), and metavanadate(V) ions were detected in conventional fluctuation assays, indicating the importance of this technique in detection of metal mutagens.
Vanadium
Definition:
(n.) A rare element of the nitrogen-phosphorus group, found combined, in vanadates, in certain minerals, and reduced as an infusible, grayish-white metallic powder. It is intermediate between the metals and the non-metals, having both basic and acid properties. Symbol V (or Vd, rarely). Atomic weight 51.2.
Example Sentences:
(1) N-Methylformamide extracts of acid-treated precipitated VFe protein of the V-nitrogenase of Azotobacter chroococcum are yellow-brown in colour and contain vanadium, iron and acid-labile sulphur in the approximate proportions 1:6:5.
(2) To further characterize the role of superoxide anion-radical in the vanadium redox cycling, the increase of optical density of vanadate(V) dissolved in Tris buffer was measured at 328 nm during the addition of KO2.
(3) The oxidative properties of Vv can be used in the photocolorimetric determination of those reducers which give no other reactions with vanadium ions-penta and tetravalent.
(4) The amount of lead excreted in feces decreased, however, with administration of oxythiamine and vanadium.
(5) 51V nuclear magnetic resonance spectroscopy and electron paramagnetic resonance spectroscopy were employed to investigate the interactions between ammonium vanadate and sugar phosphates and the formation of vanadium--sugar phosphate complexes that may be involved in the stimulation of the catalytic activity of the isomerases.
(6) Two sites of vanadium action in green algae are discussed.
(7) In presence of vanadium, the chlorophyll formation was stimulated in Scenedesmus obliquus.
(8) 2-Mercaptosuccinic and ascorbic acids were not effective as antidotes for parenteral vanadium intoxication.
(9) Hepatic, renal, and femur vanadium concentrations were usually reduced at the higher levels of NaCl supplementation, but there was little correlation between these reductions and the reversal of vanadate toxicity.
(10) The 1-H nuclear magnetic resonance spectrum of living tunicate blood cells was examined in an attempt to develop a biophysical assay for the native vanadium chromogen.
(11) Plasma protein exchange reactions were also studied on hydrophilic titanium (Ti), vanadium (V), and silver (Ag) surfaces.
(12) Thus, interference by oxyvanadium did not appear to be related to changes in pH of samples containing vanadium oxyions.
(13) veratridine, sanguinarine nitrate, penicillic acid, vanadium pentoxide, harmaline-HCI,5,5'-diphenyl hydantoin, quindonium bromide, and methyl quinolizinum bromide) provides strong evidence that the observed species-related differences are highly specific for cardiotonic steroids.
(14) Significant concentrations of vanadate dimer and tetramer are only found at fairly high vanadate concentrations, so these species are not likely to represent vanadium species present under normal physiological conditions.
(15) It is postulated that free-radical redox cycling of vanadium may be responsible for the observed pulmonary toxicity.
(16) The mechanism of vanadium ions action as well as differences between vanadate and vanadyl ions effects are discussed.
(17) To obtain the usual values of arsenic, beryllium, bismuth, cadmium, chromium, cobalt, copper, mercury, methyl mercury, manganese, molybdenum, nickel, lead, antimony, vanadium, and zinc in the normal human body, the amounts of 15 metals were determined in 15 male and 15 female Japanese cadavers (average weight, 55 kg [121 lb]).
(18) Less than 2% supplement molybdenum or vanadium and do so only when administering total parenteral nutrition.
(19) A similar process might contribute to the toxic and pharmacological effects of vanadium salts.
(20) Vanadium in the 4+ (vanadyl-ion) and 5+ (vanadate-ion) oxidation state stimulates furosemide-sensitive electrogenic Cl- secretion in isolated epithelia of rabbit descending colon.