Fluorescent conjugated polymer, poly(3-aminobenzoic acid), as a new class of fluorescence sensor for detection of trace amounts of water in organic solvents was developed. This sensor exhibits extraordinarily high sensitivity with a detection limit as low as 0.008 wt% for water in DMF.

In defense of: • Glycerine (Page 4) • Cetyl Stearyl Alcohol (Page 5) • Animal Products (Beeswax, Lactic acid & Lanolin in one product each) (Page 5) • Para-aminobenzoic Acid (PABA) (Page 5) • Parabens (Page 6) o Hazardous and Useless Alternatives Exposed (Page 8) Silver Chloride (Page 8) Grapefruit Seed Extract [Adulterated with Benzethonium Chloride & Triclosan] (Page 8) In defense of: • Sodiu...

Through X-ray absorption and emission spectroscopies, the chemical, electronic and structural properties of organic species in solution can be observed. Near-edge X-ray absorption fine structure (NEXAFS) and resonant inelastic X-ray scattering (RIXS) measurements at the nitrogen K-edge of para-aminobenzoic acid reveal both pH- and solvent-dependent variations in the ionisation potential (IP), 1...

A new pactamycin analogue, 5"-fluoropactamycin, was prepared by directed biosynthesis. Supplementation of the fermentation medium of Streptomyces pactum, var. pactum with 3-amino-5-fluorobenzoic acid, an analogue of 3-aminobenzoic acid, an advanced precursor in pactamycin biosynthesis, resulted in co-production of pactamycin and the new pactamycin analogue. A similar feeding experiment with 3-a...

OBJECTIVES Involvement of tyrosinase in the synthesis of melanin and cell signaling pathway has made it an attractive target in the search for therapeutic inhibitors for treatment of different skin hyperpigmentation disorders and melanoma cancers. MATERIALS AND METHODS In the present study, we conducted a comprehensive kinetic analysis to understand the mechanisms of inhibition imposed by 2-a...

A comparison of the electrochemical gating of molecular conduction by a redox [Os(bipyridine)(pyridine)Cl] complex tethered to Au(111) with two different metal-molecule junctions in a scanning tunneling microscope nanogap is presented. The same redox molecular structure was tethered by mercaptobenzoic acid or reduction of the aryldiazonium salt of p-aminobenzoic acid, resulting in a Au-S or Au-...

Aged distilled beverages (cognac and brandy) contain phenolic antioxidants as their quality markers. Voltammetric sensors based on the carbon nanotubes electropolymerized pyrocatechol violet (PCV) or p-aminobenzoic acid (ABA) were developed for simultaneous determination of in cognac brandy. The polymerization conditions PCV ABA optimized. Sensors allow sensitive gallic ellagic acids well syrin...

The occurrence of many of the water-soluble vitamins in sweat has been reported in recent years. Sargent, Robinson, and Johnson (1) have reviewed the literature on the occurrence of ascorbic acid, dehydroascorbic acid, thiamine, riboflavin, pantothenic acid, and nicotinic acid in sweat. We have demonstrated the presence of pyridoxine and its metabolites (2), choline (3), N1-methylnicotinamide (...

Two human acetyl-CoA:arylamine N-acetyltransferases (NAT1 and NAT2) have been identified. Therapeutic and carcinogenic agents that are substrates for these isoenzymes (including isoniazid, sulfamethazine, p-aminobenzoic acid, 5-aminosalicyclic acid, and 2-aminofluorene) have been used to evaluate the role of the N-acetylation polymorphisms of NAT1 and NAT2 in the treatment of disease and differ...

Recent investigations have shown that distillers’ dried solubles contain a factor or factors which are necessary for the growth of chicks (1) and rats (2). This factor is distinct from vitamin A, vitamin D, thiamine, riboflavin, inositol, nicotinic acid, pantothenic acid, p-aminobenzoic acid, choline, pyridoxine, biotin, folic acid, or 2-methylnaphthoquinone. A procedure has been developed for ...