What's the difference between monazite and praseodymium?
Monazite
Definition:
(n.) A mineral occurring usually in small isolated crystals, -- a phosphate of the cerium metals.
Example Sentences:
(1) The thoron flux from a dry, "infinitely thick" layer of monazite was found to be 41 Bq m-2 s-1.
(2) Gamma radiation levels had a mean value of approximately 40 nSv h-1, and monazite sand returned the highest activity concentrations of 0.16% and 3.4% for 238U and 232Th, respectively.
(3) More extensive work on monazite samples from a number of sites will be necessary before this can be stated as a general conclusion applicable to all Western Australian monazite deposits.
(4) 228Ra and 220Rn (also designated thoron in the paper), were investigated in a typical Western Australia monazite.
(5) The depth of monazite from which thoron is exhaled is limited to 40-50 mm, and within the first 10 mm is a linear function of bed thickness.
(6) The results indicate that secular equilibrium may be assumed when calculating 232Th daughter concentrations in monazite from the gross alpha activity.
(7) In a search for geochemical factors that could play a role in the pathogenesis of tropical endomyocardial fibrosis, endomyocardial tissue samples obtained from patients at necropsy or operation were analysed for major elements present in laterite and monazite, which are important soil constituents of Kerala State of India.
Praseodymium
Definition:
(n.) An elementary substance, one of the constituents of didymium; -- so called from the green color of its salts. Symbol Ps. Atomic weight 143.6.
Example Sentences:
(1) Moreover, lanthanum itself as well as lanthanides other than cerium, e.g., gadolinium and didymium (praseodymium, neodymium), were successfully applied and can be recommended as capture agents for phosphatase cytochemistry.
(2) The interaction of a series of beta-adrenoreceptor blocking agents with unilamellar dimyristoylphosphatidylcholine (DMPC) liposomes has been studied by proton nuclear magnetic resonance (1H-NMR) in the presence of praseodymium cation (Pr3+) at 30 degrees C. Addition of Pr3+ increased the splitting of the trimethylammonium group signals arising from the phospholipid molecules located at the internal and external surfaces of the bilayers.
(3) After oral administration, silipide exhibited a significant and dose-related protective effect against the hepatotoxicity induced by CCl4, praseodymium, ethanol and galactosamine.
(4) In the serum, phospholipid concentration fell to half the normal value within the first 24 hrs after praseodymium intoxication.
(5) On the other hand, energy transfer measurements using the lanthanide, praseodymium (Pr3+), as an acceptor indicate that IAEDANS is located 16-18 A from the binding site(s) of this calcium analog.
(6) Absorption difference and comparative absorption spectrophotometric studies on praseodymium(III) and fluorouracil, fluorocytosine, fluoroadenine, fluorothymine, fluorouridine, fluorocytidine, fluoroadenosine and fluorothymidine systems at pH approximately 5.5 and in different stoichiometries in 80% DMF medium have been carried out.
(7) The pretreatment of animals with phenobarbital normalized the microsomal enzyme impairment caused by praseodymium.
(8) The perovskite-like compounds RE(1-X)Pb(5)MnO(3) and RECoO(3), where RE (rare earth) is lanthanum, praseodymium, or neodymium, are active catalysts for the oxidation of carbon monoxide.
(9) The separate identification of the -N(+)-(CH(3))(3) groups located on the outside and inside of phospholipid bilayers observed in proton magnetic resonance spectroscopy upon addition of low concentrations of praseodymium ion was exploited to investigate the effects of incorporated cholesterol.
(10) The plot of the p2H dependence of the chemical shift of the outer trimethylammonium resonance of phosphatidylcholine liposomes with praseodymium ions present only on the outside of vesicles, results in a sigmoidal titration curve with its midpoint at p2H 1.5.
(11) for 15 days, praseodymium did not alter pharmacological effects and pharmacokinetic parameters.
(12) The addition of lanthanum chloride or praseodymium chloride in a peptide solution induces some conformational changes as displayed by several concerted variations of peptide resonances.
(13) Serum ornithine carbamoyltransferase (OCT) in rats poisoned with lanthanum, cerium and praseodymium.
(14) The serum ornithine carbamoyltransferase in relation to doses of lanthanum, cerium and praseodymium, administered intravenously as chlorides, was investigated.
(15) The analysis of the isolated solid complexes has suggested octa- and nona-coordination for praseodymium(III) in fluorinated nucleic bases and fluorinated nucleoside complexes.
(16) After intravenous injection of praseodymium nitrate, female Wistar rats develop fatty livers.
(17) The aim of this study is to investigate the quality of serum high density lipoprotein content as an index for the severity and time course of liver damage and regeneration following the administration of praseodymium.
(18) tris(1,1,1,2,2,3,3-heptafluoro-,7-dimethyl 1-4,6-octanedionato) praseodymium, to trilinolein has been found to induce a difference in the chemical shifts of the absorptions from the acids on the alpha- and beta positions.
(19) Intravenous injection of praseodymium nitrate into female Wistar rats results in liver damage.
(20) Upon addition of praseodymium ions, the phosphorus signals are shifted downfield.