337. The conductivity and p<sub>H</sub>values of calcium hydroxide solutions at 25°

Lea, F. M.; Bessey, G. E.

doi:10.1039/jr9370001612

Cited by 8 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The excellent agreement between the pH values for Ca(OHh solutions, from 0.04 to 0.015 equiv/liter, reported by Lea and Bessey [18] and those reported here is of interest because different methods of calculating pH were employed.…”

Section: Ph and Other Constants Of The Filtratesmentioning

confidence: 57%

Composition and physical properties of aqueous extracts from Portland cement clinker pastes containing added materials

Kalousek¹,

Jumper²,

Tregoning³

1943

J. RES. NATL. BUR. STAN.

View full text Add to dashboard Cite

Mixtures of 12 commercial portland cement clinkers and water were filtered at 7 minutes and at 2 hours after m ixing, and the chemical composition, pH, conductivity, surface tension, and density of the extracts were determined. The effects on the composition and physical properties of the extracts, produced by the addition of small amounts of various materials to the pastes, were studied in parallel experiments. The added materials included gypsum, which was used in preparing the cements from the clinkers, calcium chloride, calcium ace tate, fluosilic ic acid, sucrose, T D A, tannic acid, and triethanolamine.In the majority of the extracts, soda and potash were present in greater amounts than an y of the other dissolved oxides. Relatively high concentrations of sulfate occurred in the extracts of the clinkers that contained the larger amounts of potash. The lime concentration and basicity of the extracts were largely determined by the amounts of alkali oxides present. The concentration of silica corresponded approximately to the reported solubility of silica in lime solutions. Low concentrations of oxides of the R 20 a group were found except in extracts from pastes con taining the added organic materials.

show abstract

Section: Ph and Other Constants Of The Filtratesmentioning

confidence: 57%

Composition and physical properties of aqueous extracts from Portland cement clinker pastes containing added materials

Kalousek¹,

Jumper²,

Tregoning³

1943

J. RES. NATL. BUR. STAN.

View full text Add to dashboard Cite

show abstract

“…The mechanism of the action of chloride is unlikely to be connected with the solubility of the lipoprotein, because the maximum accelerating effect was reached at salt concentrations too low seriously to affect solubility. Since activity at pH 5-2 but not at pH 6 8, and activation by chloride but probably not by fluoride, are properties of the ill defined unsaturated fatty acid 'lipoxidase' of manmmalian muscle (Lea, 1937), it is possible that contamination with such an enzyme rather than the nature of the lipoprotein itself might be responsible for the observed results. In the absence of adequate data on the properties of the 'lipoxidase', it was not considered profitable to pursue the matter further at this stage.…”

Section: X200mentioning

confidence: 91%

The relative rates of oxidation of lipovitellin and of its lipid constituent

Lea

Hawke

1951

Biochemical Journal

View full text Add to dashboard Cite

“…In order to eliminate a troublesome correction for temperature variations, it is customary to keep the tube which contains the reference liquid in a thermostated bath held within a few thousandths of a degree of a predetermined setting. Finally, several mechanical pipets have been proposed to obtain reproducibly water drops of constant volume (4,6).…”

Section: Precision Attainablementioning

confidence: 99%