What's the difference between didymium and praseodymium?
Didymium
Definition:
(n.) A rare metallic substance usually associated with the metal cerium; -- hence its name. It was formerly supposed to be an element, but has since been found to consist of two simpler elementary substances, neodymium and praseodymium. See Neodymium, and Praseodymium.
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) Chicken erythrocytes, and myxamoebae and plasmodia of Didymium iridis were employed as experimental tissues.
(3) Cell coats were cytochemically demonstrated for the first time in myxamebae of Fulig- septica, Didymium iridis, Dictyostelium discoideum, Cavostelium apophysatum, and amebae of Naegleria grubei.
(4) A method for the isolation of the plasma membranes of the acellular slime mould, Didymium iridis in the myxamoebae and swarm cell stages was developed using a modified dextranpolyethylene glycol aqueous two-phase polymer system.
(5) Structural and evolutionary comparisons suggest that the corresponding introns 1 and 2 were present in a common ancestor of Didymium and Physarum, and that the five introns in LSU rRNA genes of these myxomycetes were acquired in three different events.
(6) The inheritance of both the mitochondrial DNA (mtDNA) and the nuclear-encoded extrachromosomal ribosomal DNA (rDNA) has been studied in the myxomycete, Didymium iridis, by DNA-DNA hybridization of labeled probes to total DNA at various stages of the life cycle.
(7) We have determined the telomeric DNA sequence of the acellular slime molds Didymium iridis and Physarum polycephalum.
(8) To avoid formation of insoluble lanthanide hydroxide at alkaline pH citrate complexes with the capture ions cerium, lanthanum and didymium were used.
(9) This sequence was determined by cloning and sequencing the telomeric fragment of the linear extrachromosomal ribosomal DNA from Didymium, as well as direct end labeling and sequencing the rDNA from both organisms.
(10) Based on pairwise comparisons of LSU rRNA sequences, the time of divergence between the two myxomycete genera Didymium and Physarum was estimated.
(11) Haploid isolates Panamanian 2-7A8 and Honduran 1-2A1 of the heterothallic myxomycete Didymium iridis were investigated in order to determine whether membrane mating factors or receptors were present and necessary in order that cell fusion could occur and zygote formation take place.
(12) It is based on the distortion that the characteristic absorption bands of glass filters (holmium or didymium oxide), commonly used for calibration of spectrophotometers, introduce in the emitted fluorescence of fluorophores like indole, diphenyl hexatriene, xylene or rhodamine 6G.
(13) Haploid myxamoeboid mating types, CR5-11A11 and HON 1-2A1, of the acellular myxomycete Didymium iridis, were isolated and grown in liquid culture.
(14) The ribosomal DNA of the myxomycete Didymium iridis is organized as extrachromosomal linear molecules of about 20 kb, containing only one transcription unit of the ribosomal RNA genes.
(15) Quantitative cytochemical determinations were made of the DNA of zygotes formed from myxamoebae and swarm cells of Didymium iridis.
(16) We have examined five nuclear group I introns, located at three different positions in the large subunit ribosomal RNA (LSU rRNA) gene of the two myxomycete species, Didymium iridis and Physarum polycephalum.
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.