What's the difference between gadolinium and monazite?
Gadolinium
Definition:
(n.) A supposed rare metallic element, with a characteristic spectrum, found associated with yttrium and other rare metals. Its individuality and properties have not yet been determined.
Example Sentences:
(1) By presenting the case history of a man who successively developed facial and trigeminal neural dysfunction after Mohs chemosurgery of a PCSCC, this paper documents histologically the occurrence of such neural invasion, and illustrates the utility of gadolinium-enhanced magnetic resonance scanning in patient management.
(2) In the present study, 24 patients, matched for age, sex, duration of disease, and disability, had serial gadolinium diethylenetriaminepentaacetic acid-enhanced MRI over a 6-month period.
(3) The smaller 50-nm Gd-DTPA liposomes resulted in a longer blood pool phase and a higher delivery of gadolinium to the liver, bone marrow, and spleen.
(4) 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.
(5) Because of the high incidence (33%) of CSF dissemination, postoperative evaluation of the craniospinal axis with gadolinium-enhanced magnetic resonance imaging should be performed on all children with supratentorial malignant gliomas.
(6) plane and enhanced CT, T1, 2 weighted MRI and Gadolinium enhanced MRI, have been developed.
(7) Large polysaccharide complexes, cross-linked with DTPA and chelated with gadolinium have been tested for various potential uses for magnetic resonance imaging (MRI) in rats.
(8) Gadolinium (Gd3+) produced a dose-dependent and complete inhibition of whole-cell Ba2+ current in all cells studied, including cells expressing identified dihydropyridine-sensitive L-type currents and omega-conotoxin-sensitive N-type currents.
(9) We performed 15 dynamic gadolinium-DTPA (Gd-DTPA)-enhanced MRI studies in 8 patients with relapsing and remitting multiple sclerosis; 7 were follow-up studies.
(10) In meningiomas, a flat, contrast-enhancing, probably dural structure adjacent to the tumor can occasionally be observed on Gadolinium-DTPA enhanced MR images.
(11) Dual energy photon absorptiometry uses a gadolinium-153 isotope source to emit photons of two different energies.
(12) The combination of T2-weighted images, MR angiography, and gadolinium-DTPA first-pass studies nicely demonstrated the arteriovenous malformations and the effect of embolisation which ranged from negligible to almost complete.
(13) A consistent finding was a low signal intensity on pre-gadolinium images, but the pattern (focal or diffuse abnormal signal intensity) was different in each patient.
(14) Before gadolinium this information was not available in eight patients.
(15) As regards post-therapeutic monitoring, MRI with gadolinium contrast injection is harmless and will make it possible to follow these patients regularly and to detect recurrences.
(16) The integrity of the blood-testes barrier was evaluated using 1H NMR imaging following a gadolinium diethylene tetramine pentaacetic acid derivative (Gd-DTPA) administration as a vascular contrast agent.
(17) Eighteen patients with acute optic neuritis underwent optic nerve magnetic resonance imaging (MRI) before and after injection of gadolinium-diethylene triamine pentacetic acid (Gd-DTPA).
(18) The lanthanide cation gadolinium (Gd) reduced the amplitude of the unitary currents in a concentration-dependent manner.
(19) This study shows that infarcted areas can be detected on plain MRI images in the form of a hypersignal, probably attributable to increased proton density, with better efficiency of GE compared with spin-echo imaging; injection of gadolinium-DOTA allows better delineation of infarcted areas, especially for 10 minutes after administration.
(20) Dextran labeled with 15 Gd-DTPA moities (molecular weight of approximately 75,000 d) had a T1 relaxivity at 0.25 T and 37 degrees C of 157.1 mmol-1.sec-1 per molecule and 10.5 mmol-1.sec-1 per gadolinium atom, more than twice that of unbound Gd-DTPA.
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.