Cinematography — Spools, daylight loading type for 16 mm motion-picture cameras — Dimensions
Specified are the dimensions and characteristics of daylight loading spools for various lengths of 16 mm motion-picture film. Spools for high-speed cameras should be balanced; the specifications are only partially valid for them. The dimensions given herien are substantial agreement with those for microfilm camera spools.
Dehydrated garlic — Determination of volatile organic sulphur compounds
The method consists in macerating of a test portion in aqueous medium, distillation of the sulphur compounds, and argentimetric titration of the distillate in nitric acid medium. A figure shows a recommended distillation apparatus.
Cationic surface active agents (Hydrochlorides and hydrobromides) — Determination of critical micell...
The determination is carried out as follows: Potentiometric determination of the chloride or bromide ion activity of a series of solutions of cationic surface active agents the concentration of which cover the expected micellization concentration. Plotting the graph of potential as a function of the logarithm of the concentration; the c.m.c. corresponds to the singularity on this curve. The…
Agents de surface cationiques (chlorhydrates et bromhydrates) — Détermination de la concentration cr...
La présente Norme internationale spécifie une méthode de détermination de la concentration critique pour la formation de micelles des agents de surface cationiques (chlorhydrates et bromhydrates), en solution dans l'eau distillée ou autres systèmes aqueux, par mesurage de l'activité de l'ion contraire à l'aide d'une électrode à membrane. La méthode est applicable aux…
