The use of benzidine hydrochloride to precipitate sulfates as insoluble benzidine sulfate was first proposed by Miiller (1902) for the determination of free and bound sulfur in minerals. Subsequently Rosenheim and Drummond (1914) and Fiske (1921) used it for the determination of sulfates in urine. Later Fiske (1922) described a method for the determination of total base in urine, the bases afte...

The utilization of pig manure as a source of nutrients for the dissimilatory reduction of sulfates present in phosphogypsum was investigated. In both types of media used (synthetic medium and raw pig manure) increased utilization of sulfates with growing COD/SO4(2-)ratio in the medium was observed. The percent of sulfate reduction obtained in synthetic medium was from 18 to 99%, whereas the val...

BACKGROUND The displacement of l-thyroxine (T4) from binding sites on transthyretin (TTR) is considered a significant contributing mechanism in polychlorinated biphenyl (PCB)-induced thyroid disruption. Previous research has discovered hydroxylated PCB metabolites (OH-PCBs) as high-affinity ligands for TTR, but the binding potential of conjugated PCB metabolites such as PCB sulfates has not bee...

CeO2, ZrO2, and a series of CexZr1-xO2 catalysts with 1 wt% Pd were exposed to fixed exposures of SO2 under oxidizing environments and then characterized by FTIR, pulse-reactor studies with CO and O2, and temperature-programmed desorption (TPD). For exposures above 473 K, sulfates were formed on all of the materials; however, the results are consistent with the formation of bulk sulfates on CeO...

Fe-sulfates on Mars: Sulfate is one of the major types of secondary minerals found on Mars by recent missions, which reinforced its importance for Mars science. Sulfates are excellent hosts of water, the sinks of acidity, and maybe the most active species in the past and current surface/near-surface processes on Mars [1]. Although Mgand Ca-sulfates were identified with wide vertical and horizon...

Changes in extracellular matrix glycosaminoglycans during the wound repair allowed us to apply the burn model in which therapeutic efficacy of propolis and silver sulfadiazine was compared. Burns were inflicted on four pigs. Glycosaminoglycans isolated from healthy and burned skin were quantified using a hexuronic acid assay, electrophoretic fractionation, and densitometric analyses. Using the ...

The effect of various levels of proteins, sulfates, and molecular weight (M w) of a sulfated-glycoprotein (NF3) from a sea cucumber, Stichopus japonicus, on nitric oxide (NO) releasing capacity from RAW 264.7 cells was investigated. The NF3 derivatives had various amounts of proteins (4.8~11.2%) and sulfates (6.8~25.2%) as well as different M w (640.3×10(3)~109.2×10(3) g/mol). NF3 was able to s...

The species formed by exposure of a Pd/ceria catalyst to SO2 under various conditions have been studied using temperature-programmed desorption (TPD) and FTIR. For adsorption of SO2 between 298 and 473 K, a molecular SO2 species adsorbs on the surface, possibly as a surface sulfite; and this species converts to a sulfate above 473 K. Exposure of Pd/ceria to SO2 at temperatures above 473 K in th...

les schoenites chromates sont parfaitement isotypes : entre elles et avec les sulfates correspondants , ils cristallisent tous dans le systeme monoclinlque p2 /c , avec deux motifs par maille . une etude thermique analogue a ete effectuee sur les chromates doubles : m mg(cro ) , 6h 0 ou m =rb ou cs , la deshydration de ces sels conduit aux tetrahydrates , aux sels anhydres qui se decomposent ap...