deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.

Various kinds of biosensors were developed for the environmental control. Microbial sensor consisting immobilized yeasts and oxygen probe has been applied to estimation of 5-day BOD. The response time of BOD sensor was less than 20 mm and the minimum measurable BOD was 3 mg l-. Amperometric microbial sensor for ammonia was constructed with immobilized nitrifying bacteria and an oxyger probe. Th...

/ac-L i4[R h(S03)3(0 H 2)3](0H ) crystallizes in the rhombohedral space group R 3-C 34, Z = 1, in trigonal setting a = 807.7(2), c = 1339.0(3) pm, V = 756.6(2)-106 pm3, Z = 3. Rh is octahedrally coordinated by three facial S-bonded sulfite groups with R h -S = 222.6(1) pm and three aqua ligands with R h -O bonds R h -O = 217.5(3) pm, elongated by a /raos-influence. The average S -O bond length ...

Based on a novel coumarin-quinolinium platform, probe 2 was rationally designed and synthesized as a novel ratiometric fluorescent sensor for sulfite anions. The probe exhibited a wide dynamic concentration range for sulfite anions in a PBS buffer (containing 1 mg mL(-1) BSA). More importantly, the probe was suitable for ratiometric fluorescence imaging in living cells with high sensitivity, fa...

With the increasing industrial production, there was a significant number of toxic and harmful hydrogen sulfide (H2S) gas generated. Due to activities, converting H2S from waste process is environmentally attractive. This paper focuses on conversion elemental sulfur (S°) other species (i.e., sulfite ion (SO32-); sulfate (SO42-) using Fenton reagent. The effects some reaction parameters such as ...

Several point mutations in the gene of human sulfite oxidase (hSO) result in isolated sulfite oxidase deficiency, an inherited metabolic disorder. Three conserved residues (H304, R309, K322) are hydrogen bonded to the phosphate group of the molybdenum cofactor, and the R309H and K322R mutations are responsible for isolated sulfite oxidase deficiency. The kinetic effects of the K322R mutation ha...

A universal molybdenum-containing cofactor is necessary for the activity of all eukaryotic molybdoenzymes. In humans four such enzymes are known: Sulfite oxidase, xanthine oxidoreductase, aldehyde oxidase and a mitochondrial amidoxime reducing component. Of these, sulfite oxidase is the most important and clinically relevant one. Mutations in the genes MOCS1, MOCS2 or GPHN all encoding cofactor...

References 1. Johnson JL, Wadman SK. Molybdenum cofactor deficiency. In: Scriver CR, Beaudet AL, Sly WS, Valle D, eds. The metabolic basis of inherited disease, 6th ed. New York: McGraw-Hill, 1989:1463-75. 2. Wadman SK, Cats BP, deBree PR Sulfite oxidasedeficiency and the detection of urinary sulfite. Eur J Pediatr 1983;14162-8. 3. Mudd SH, Levy HL, Skovby F. Disorders of transsulfuration. In: ...