Chemical modification of chloromethylstyrene - styrene copolymer throughout reaction p-substituted carboxylic acid group bis-(4,4`-dibromo)-4``-triphenylamine with the chloromethyl attached to a phenyl was carried out on soluble and polymeric cross-linked copolymer. oxidation neutral triphenylamine antimony pentachloride in dichloromethane solvent gives corresponding cation radical salt counter...

The influence of fluorinated substituents on the luminescent properties rhenium-oxo, osmium-nitrido, and gold triarylcorroles was studied via a comparison four ligands: triphenylcorrole (TPC), tris(p-trifluoromethylphenyl)corrole (TpCF3PC), tris{3,5-bis(trifluoromethyl)phenyl}corrole (T3,5-CF3PC), tris(pentafluorophenyl)corrole (TPFPC). For each metal series examined, were found to enhance prop...

BACKGROUND Gadolinium-induced encephalopathy is a well documented complication due to the inadvertent entrance of a high dose of gadolinium into the intrathecal compartment. In lab animals, injecting gadolinium into the intrathecal compartment resulted in neurotoxicity and seizures. It is also well recognized that the presence of autologous blood in the intrathecal compartment can cause a broad...

the synthesis of smcl3(thf)3 from smcl3.6h2o is described. the reaction of smcl3(thf)3 with nabh4 in dry thf gave white microcrystalline tris (tetrahydroborato) tris (tetrahydrofuran) samarium (iii), sm(bh4)3(thf)3. the vibrational and magnetic properties of sm(bh4)3(thf)3 have been studied.

The optimum infusion timing and k-space ordering for obtaining gadolinium-enhanced three-dimensional MR angiograms was determined through computer modeling using temporal contrast characteristics obtained from patient gadolinium infusion data. The effects of bolus timing were evaluated by varying the relationship between peak intravascular gadolinium concentration and the time at which the cent...

A number of new charge-neutral zwitterionic tris(methimazolyl)borate ligands have been synthesized, either by substitution of the dimethylamine group in the adduct (dimethylamine)tris(methimazolyl)borane (1) or by insertion into its B-N(dimethylamine) bond by an unsaturated Lewis base. Two new anionic ligands, (thiocyanato)tris(methimazolyl)borate and (cyano)tris(methimazolyl)borate, have also ...

Solutions of tris(hydroxymethyl)aminomethane (Tris) have been shown to be a convenient primary standard for the Kjeldahl analysis. This compound is readily available in analytical reagent grade and has all the desirable properties of a primary standard. It is unnecessary to protect the Tris solution from C02, as any reaction between Tris and this gas cannot be detected by the titrimetric proced...

Late gadolinium enhanced magnetic resonance imaging (MRI) is an established technique for quantification of dense myocardial fibrosis (1). Cohesive regions of myocardial fibrosis, such as infarcted myocardium, are characterized by expanded extracellular matrix due to replacement of normal myocytes with collagen. Gadolinium contrast agents perfuse into and wash out of normal myocardium relativel...