Influence Of Boric Acid Research Articles

The influence of boric acid and dissolved oxygen on the morphology of electroless palladium films

The effects of boric acid and dissolved oxygen on the morphology of palladium films deposited from the ethylenediaminetetraacetic acid (EDTA) and triethyleneamine (TEA) baths were studied. Striking morphological differences in the palladium films after the addition of boric acid were observed by scanning electron microscopy. The addition of boric acid in the EDTA bath enhances the deposition rate, while in the TEA bath it has the effect of producing lower coverage films and changing the particle shape from agglomerated nodules to round and smooth particles. The function of boric acid in the electroless bath is not only to act as a buffer but also to affect the nucleation and growth behavior of deposits, depending on the bath composition. The effect of dissolved oxygen on the electroless palladium films was investigated by growing films from EDTA and TEA baths that had had the dissolved oxygen concentration reduced by bubbling nitrogen through the baths for 10 min prior to electroless deposition. The palladium films deposited from the bath with dissolved oxygen are typically loosely packed discontinous films. The EDTA bath seems to be more sensitive to the dissolved oxygen, resulting in palladium deposits which are fewer than those from the nitrogen-bubbled bath. A possible mechanism of the dissolved oxygen effect in the electroless metal bath is proposed.

ChemInform Abstract: Morphology and Composition of Electrodeposited Cobalt‐Zinc Alloys and the Influence of Boric Acid.

AbstractThe addition of boric acid to the CoSO4/ZnSO4/NH4Cl plating bath on the morphology of cobalt‐zinc alloys electrodeposited on a Pt rotating disk electrode is studied by SEM and solid state stripping voltammetry.

Morphology and Composition of Electrodeposited Cobalt‐Zinc Alloys and the Influence of Boric Acid

The morphology and composition of cobalt‐zinc alloys electrodeposited on a Pt rotating disk electrode were investigated. Three unique morphologies have been identified by scanning electron microscopy and the composition of each characterized by solid‐state stripping voltammetry. The effect of boric acid on the morphology of the surface films was also investigated. The results indicate that addition of boric acid to the plating bath increases the nucleation density of the deposit and increases the content of Zn in the alloy. The current efficiency for the deposition process is also enhanced in the presence of boric acid. These effects have been attributed to the adsorptive interactions of boric acid at the electrode surface.

Influence of boric acid on the determination of iron in reactor coolant water by graphite furnace atomic absorption spectrometry

The matric effect of boric acid was investigated in the determination of iron in the primary circuit coolant water of nuclear power plants by furnace atomic absorption spectrometry. The effect of boric acid was of particular interest. The method was applied during refuelling and maintenance periods and the results were used to interpret the chemical changes in the water.

ChemInform Abstract: The Influence of Boric Acid on Electrodeposition and Stripping of Ni‐Zn Alloys

Abstractis investigated using a Pt rotating disk electrode.

Influence of Boric Acid on Electrodeposition and Stripping of Ni‐Zn Alloys

The effect of boric acid on the electrodeposition and potentiodynamic stripping behavior of Ni‐Zn alloys was investigated using Pt rotating disk electrode. At low Zn(II) concentrations, boric acid raised the current efficiency of the deposition process and at higher Zn(II) concentrations, an increase in the Ni content of the deposited alloy was observed. In the presence of boric acid, a considerable change in the primary nucleation rate and suppression of the secondary nucleation processes on the alloy surface have also been observed. All these effects have been attributed to the adsorptive interactions of boric acid.

Influence of Boric Acid on the Hydrolysis Rate of a Hydroxy Schiff Base

Abstract Effects of boric acid on the rate of hydrolysis of a Schiff base derived from α-hydroxyisobutyrophenone and 2-methoxyethylamine were examined in the pH range 4.2–10.4 at 30 °C. The rate increased above pH 7 but decreased below pH 7 with increasing borate concentration following a saturation curve. This is consistent with a reaction sequence involving a preequilibrium formation of a borate–substrate complex followed by its rate-determining decay to the hydrolysis products. The formation constant of the complex showed a bellshaped change with pH but the rate constant for the complex decay was constant above pH 7, a small change being observed at lower pH. A mechanism involving an intramolecular transfer of the boron-coordinated hydroxide ion to the imine carbon within the complex is presented. Hydrazone formation from the hydroxy ketone was also examined in the presence of boric acid.

Influence of boric acid on hydrolysis rate of salicylideneanilines

Influence of boric acid on hydrolysis rate of salicylideneanilines

The influence of boric acid on the electrolytic dissociation of electrolytes

The influence of boric acid on the electrolytic dissociation of electrolytes

Influence of boric acid in diaminophenol developers

Influence of boric acid in diaminophenol developers

The influence of boric acid and borax on digestion and health

The influence of boric acid and borax on digestion and health

Influence of Boric Acid and Borax on Digestion and Health

Influence of Boric Acid and Borax on Digestion and Health

Influence of Boric Acid and Borax upon the General Metabolism of Children

Influence of Boric Acid and Borax upon the General Metabolism of Children

On the Influence of Boric Acid and Borax upon the General Metabolism of Children

Both boric acid and borax are extensively used as food preservatives, and much interest attaches to the question of their influence if any upon the general nutrition of the consumer, especially children. Although this method of preserving food has existed for a comparatively long period there seems no agreement as to the harmfulness or otherwise of these substances when taken with a mixed diet.

Notes on the influence of boric acid upon the action of the digestive ferments

Notes on the influence of boric acid upon the action of the digestive ferments

On the influence of boric acid on peptic digestion

On the influence of boric acid on peptic digestion