The possibility of application of 4-nitrocatechol (4-NC) - tetrazolium salt - organic solventsystems for liquid-liquid extraction-spectrophotometric vanadium (IV and V) speciation wasstudied. Six commercially available tetrazolium salts (2,3,5-triphenyltetrazolium chloride (TTC),3-(2-naphtyl)-2,5-diphenyltetrazolium chloride (Tetrazolium Violet, TV); 3-(4,5-dimethyl-2-thiazol)-2,5-diphenyltetra...

the possibility of application of 4-nitrocatechol (4-nc) - tetrazolium salt - organic solventsystems for liquid-liquid extraction-spectrophotometric vanadium (iv and v) speciation wasstudied. six commercially available tetrazolium salts (2,3,5-triphenyltetrazolium chloride (ttc),3-(2-naphtyl)-2,5-diphenyltetrazolium chloride (tetrazolium violet, tv); 3-(4,5-dimethyl-2-thiazol)-2,5-diphenyltetra...

ing a methyl side hydrogen atom; the ipso-additions (addition of an atom to an aromatic ring leading to the abstraction of another atom or of a radical) of H-atoms producing naphthalene and methyl radicals; the ipso-additions of O-atoms forming methylnaphtoxy radicals and H-atoms; the additions of OH radicals leading to methylnaphthols and H-atoms; the metatheses by H-abstraction. As in the cas...

sive study because of its role in (i) the packing of aromatic molecules in the crystalline state, (ii) base-stacking interactions of DNA, (iii) three-dimensional structures of proteins, (iv) molecular recognition of pharmaceuticals by biological receptors or enzymes, and (v) template-directed synthesis. Ternary complexes of platinum(II) or palladium(II) containing 2,2 -bipyridine (bpy) or 1,10-...

Mutants from Schizosaccharomyces pombe deficient in the regulation of thiamine-repressible acid phosphatase have been isolated. Mutants expressing derepressed levels of the enzyme in the presence and absence of thiamine map in three genes, tnrl, tnr2 and tnr3. mRNA levels of the pho4 gene (coding for thiamine repressible acid phosphatase) and another thiamine-regulatable gene, thi3 (coding for ...

The introduction of a methyl group and its 13C 2H labeled analogs on Csp2-centers remains challenging issue in synthetic chemistry. While the photoredox/Ni dual catalysis has proven to constitute valuable methodology for forging Csp2?Csp3 bonds, high difficulty generate radical control reactivity severely limited development reliable processes. Herein, we introduce easily prepared bench-stable ...