Abstract Attaining low-temperature sintering and high electrical conductivity is vital in the field of flexible electronics. Inks with silver oxalate as precursor have recently received significant attention this field; however, temperature long time limit commercial applicability. High can shorten but lead to porous uneven film morphology; thus, reducing conductivity. On other hand, low prolon...

Abstract “Blue energy” could be produced by exploiting the large salinity gradient between geothermal fluids and freshwater through a SaltPower system. This study is an attempt to select most favorable chemicals avoid injectivity issues when diluted fluid resulting from system returned reservoir. Three synthetic chelating agents (oxalic acid, EDTA, EDDS) one natural (humic acid) were evaluated ...

A commercial and disposable screen-printed carbon electrode (SPCE) has been proposed for a fast, simple low-cost determination of Ni(II) at very low concentration levels by differential pulse adsorptive stripping voltammetry (DPAdSV) in the presence dimethylglyoxime (DMG) as complexing agent. In contrast with previously methods, Ni(II)-DMG complex adsorbs directly on surface, no need mercury, b...

Oxidation of ferrous iron was studied with the anaerobic phototrophic bacterial strain BS-1. Based on morphology, substrate utilization patterns, arrangement of intracytoplasmic membranes and the in vivo absorption spectrum, this strain was assigned to the known species Rhodomicrobium vannielii. Also, the type strain of this species oxidized ferrous iron in the light. Phototrophic growth of str...

A simple and efficient method for the selective separation and preconcentration of Ag+ using homogeneous liquid-liquid extraction was developed. Tetraspirocyclohexylcalix[4]pyrrole (TSCC4P) was synthesized and investigated as a suitable selective complexing ligand for Ag+. Zonyl FSA (FSA) was applied as a phase-separator agent under mild pH conditions. Under the optimal conditions ([TSCC4P] = 3...

Conalbumin is an egg white protein that inhibits growth of microorganisms by forming a pink-colored, remarkably stable complex with iron. Although the antibacterial activity of egg white has long been known, the existence of such an iron binding agent was not recognized priQr to the report of Schade and Caroline in 1944. In 1946 conalbumin was identified as the agent responsible for the antibac...

We describe a chromatographic technique for separating mixtures of DNA of varying G + C content. The method employs a specially prepared high-capacity hydroxyapatite and a G.C-specific DNA ligand (2-methyl-3-amino-7-dimethylamino-5-phenyl-phenazinium cation, abbreviated PNR). DNA molecules rich in G.C pairs bind larger amounts of this dye and are eluted earlier from the hydroxyapatite column th...

Flow injection (FI) spectrophotometric method for iron (III) determination using Disodium-1-nitroso-2-naphthol-3,6disulphonate (nitroso-R salt) is performed. It is based on the measurement of Fe(III)-nitroso-R salt complex at 720 nm formed by the reaction between Fe(III) and nitroso-R salt in an acetate buffer solution pH 5. The FI parameters that affect the signal response have been optimized ...