(n.) A rare metallic element, occurring in the minerals cerite, allanite, monazite, etc. Symbol Ce. Atomic weight 141.5. It resembles iron in color and luster, but is soft, and both malleable and ductile. It tarnishes readily in the air.
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) Electron energy-loss spectroscopic element-distribution images are acquired from cytochemical reaction products in a variety of cellular objects: (1) colloidal thorium particles in extra-cellular coat material, (2) iron-containing ferritin particles in liver parenchymal cells, (3) barium-containing reaction products in endoplasmic reticulum stacks, (4) elements present in lysosomal cerium- and barium-containing precipitates connected with acid phosphatase (AcPase) or aryl sulphatase (AS) enzyme activity.
(3) Vibratome sectons are incubated at 37 degrees C for 60 min in 0.1 M Pipes buffer, pH 7.8, containing 3 mM cerium chloride and 0.1 mM sodium urate.
(4) After smoke exposure was completed, tracheal segments were incubated in a modification of the ultrastructural cerium chloride technique that was devised by Briggs et al.
(5) A similar decrease of cerium retention in gut and whole body was obtained after simultaneous or 24 hours' delayed DTPA administration.
(6) Short (t less than 1 h) postfixation with either OsO4 plus K4Fe (CN)6 or OsO4 plus aminotriazole, added to lysosomal cerium localization a high membrane contrast.
(7) Sixty-four patients aged 16-74 years with total body surface area burns (TBSA) ranging from 30 to 90 per cent, were given one bathing in 0.04 M cerium nitrate within 4 h of admission to hospital.
(8) The new mode is based on the conversion of cerium phosphate into cerium oxalate.
(9) Lead is prevalently replaced by cerium as trapping agent in phosphatase cytochemistry to prevent non-specific precipitation.
(10) Microanalysis by electron microprobe permitted: (i) the lysosomal localization of cerium to be determined; and (ii) the lysosomal coprecipitation of cerium with phosphorus to be demonstrated.
(11) Two characteristic-line x-ray sources, one using the split K alpha 1 and K alpha 2 lines of lanthanum excited by a high-energy electron beam and the other using the K alpha lines of barium and cerium, were studied.
(12) The cerium perhydroxide technique is especially suited for demonstrating the lymphatic capillaries.
(13) The amount of cerium excreted in faeces was somewhat smaller in the nafenopin-treated animals during the whole experiment.
(14) Experiments with a daily intake marker suggest that cerium was not satisfactory as a multiple marker in which neutron activation analysis was the method of determination.
(15) The localization of the basal AC activity in heart tissue seems to be better with cerium as capture agent than with lead.
(16) The vacuolar marker enzymes adenosine triphosphatase (ATPase) and alkaline phosphohydrolase (ALPase) were assayed by the ultracytochemical cerium precipitation technique.
(17) A modified Wachstein-Meisel medium containing lead or cerium as capturing ions was used to localize Ca2+-Mg2+ adenosine triphosphatase (ATPase; EC 3.6.1.3) in rat incisor ameloblasts during enamel formation.
(18) Cerium chloride staining techniques demonstrated that H2O production was not dependent on phagocytosis or the presence of immune serum, although levels were increased by the presence of the latter.
(19) The cerium-based method was used to demonstrate cytochemically the ultrastructural localization of alkaline phosphatase (ALPase), 5'-nucleotidase (5'-Nase) and magnesium-dependent adenosine triphosphatase (Mg-ATPase) on the transitional epithelium of the rat urinary bladder.
(20) We have optimized a cerium-diaminobenzidine-based method for histochemical analysis of glucose-6-phosphatase (G6Pase) activity and have determined quantitative data on the zonal distribution pattern in the liver acinus of fasted male rats.
Lanthanite
Definition:
(n.) Hydrous carbonate of lanthanum, found in tabular while crystals.