The Osmotic Pressure of Colloidal Salts

Colloidal osmotic pressure in chronic subdural hematoma.

The colloidal osmotic and hydrostatic pressure of chronic subdural hematomas were measured with a manometer in 35 patients. Manometric measurement showed an increase in the hematoma fluid cor responding to 5% of the total hematoma volume. The maximum colloidal osmotic pressure of the hematoma fluid, as measured with a transducer, was 23 ± 12 mmHg (mean ± standard deviation). Hemor...

Osmotic pressure contribution of albumin to colloidal interactions.

Two surfaces that come in close contact in a solution with macromolecules present experience an attractive force caused by the osmotic pressure. We present a measurement of this effect by using a micrometer-sized sphere bound to a flat plate through a single molecular attachment in an albumin-containing solution. We obtain the osmotic part of the interaction potential with a resolution of <1 nm...

The Osmotic Pressure of the Ions and of the Undissociated Molecules of Salts in Aqueous Solution.

To illustrate the advantages of germinating Oenothera seeds under experimental conditions over the old practice of sowing upon earth I will give the results for a problem as attacked under the old and new method. In 1914 I germinated on earth seeds from an F1 hybrid plant, 13.35ac, of the cross 0. franciscana X 0. biennis. A sowing of 819 seed-like suctures produced a culture of 402 seedlings, ...

The Determination of the Colloidal Osmotic Pressure in Blood Serum and Similar Fluids

The importance of the colloidal osmotic pressure in biological fluids is becoming increasingly recognized, but difficulties in the older methods as yet prevent their general use in inquiries for which needed information can only be obtained from colloidal osmotic pressure data. The membrane bag arrangement used by Starling (1896) is capable of yielding admirable results (see, e.g., Adair, 1925;...

The Osmotic Pressure o f Haemoglobin in the Absence o f Salts