LVII.—Colorimetric method for determining small quantities of iron

A new method of freezing-point determination for small quantities.

To a very large extent progress in the field of invertebrate physiology is a measure of progress in the technique of manipulating small structures and analysing small samples. Within this field the study of osmotic regulation is no exception. Krogh (1938) has summarized the known methods of measuring osmotic pressure, applicable to quantities of fluid of the order of O-I-I-O cu.mm. The freezing...

Method for rupturing large quantities of microorganisms.

Many procedures have been described (Umbreit et al., 1957) for the mechanical rupturing of yeast and bacterial cells. These techniques vary from simple hand grinding with abrasives to the use of extrusion or high speed shaking devices. These techniques, although generally satisfactory when dealing with small quantities of cells, are unsuitable for breaking larger quantities of cells required in...

A New Method for the Determination of Small Quantities of Cocaine in Presence of Novocaine

Method for Determination of Calcium in Small Quantities of Blood Serum

A Conductimetric Method for the Estimation of Small Quantities of Ammonia