This paper describes a indirect complexometric method for the determination of mercury in the presence of co-ions, based on the selective masking ability of potassium iodide. To the mixture of mercury (II) and other metal ion solution, EDTA solution was added in excess of the metal ions present. The pH of the solution was adjusted to 5.0-6.0 using solid hexamine (10 ± 2 g) and surplus EDTA was ...

Time-resolved photoelectron imaging has been utilized to probe the energetics and dynamics of the transient negative ion of the nucleobase uracil. This species was created through charge transfer from an iodide anion within a binary iodide-uracil complex using a UV pump pulse; the ensuing dynamics were followed by photodetachment with a near-IR probe pulse. The photoelectron spectra show two ti...

KINSEY AND PALM (1955) have described the kinetics of penetration of two ions, sodium and thiocyanate, into the aqueous humour, and have concluded that there is a fundamental difference in their modes of penetration; the thiocyanate ion, contrary to an original claim (Kinsey and Grant, 1942), penetrating by " diffusion ", whilst sodium is said to penetrate by " secretion". An inspection of thei...

The rate of hydrochloric acid production by isolated, bullfrog gastric mucosae depends critically on the supply of chloride ion to the serosal surface. Secretion of acid is negligible if chloride is completely replaced by glucuronate and gluconate ion. The experimental evidence indicates that the rate of acid secretion may be regarded as a reaction velocity, depending on chloride concentration ...

Classical force fields for molecular simulations of aqueous electrolytes are still controversial. We study alkali and halide ions at the air/water interface using novel non-polarizable force fields that were optimized based on bulk thermodynamics. In qualitative agreement with polarizable force-field simulations, ion repulsion from the interface decreases with increasing ion size. Iodide is eve...

Due to their low cost, proven effectiveness, and lack of withholding time for milk and meat products, iodine solutions have been a popular choice in the treatment of dairy cow uterine abnormalities for over 50 years. This study was aimed at determining the quantity of iodine appearing in milk following the intrauterine administration of 60 mL of a 10% Lugol’s solution. Two groups of 6 cycling, ...

The membrane potential of the human platelet was investigated using the membrane potential probes 3,3'-dipropyl-2,2'-thiadicarbocyanine iodide and tritiated triphenylmethylphosphonium bromide. The membrane potential in physiologic buffer was estimated to be 52-60 mV inside negative. The membrane was depolarized when extracellular potassium or hydrogen ion concentrations were increased. Changes ...

The gene product affected in cystic fibrosis, the cystic fibrosis transmembrane conductance regulator (CFTR), is a chlorideselective ion channel that is regulated by cAMP-dependent protein kinase-mediated phosphorylation, ATP binding and ATP hydrolysis. Mutations in the CFTR gene may result in cystic fibrosis characterized by severe pathology (e.g. recurrent pulmonary infection, male infertilit...