Microchemical Studies on Plant Components. XXI

Studies on Plant Hypertensinase

Many plants contain an enzyme similar in most biological properties to the hypertensinase obtained from blood and some animal tissues, notably kidney and intestinal mucosa. Wheat bran is a rich source of the plant hypertensinase, and from it a potent, non-toxic preparation was made by the use of isoelectric and ammonium sulfate precipitation as the means of purification. Hypertensinase derived ...

Studies on Isolated Cell Components

The zonal ultracentrifuge was used to separate the subcellular components of rat liver brei into soluble phase, microsomal, mitochondrial, membranous fragments, and nuclear fractions during a single centrifugation. The centrifuge was run at 10,000 to 30,000 RPM for 15 to 240 minutes, and the rotor contained a 1200 ml sucrose gradient, varying linearly with radius from 17 to 55 per cent sucrose ...

Studies on echinococcosis. XXI. Electron microscopical observations on general structure of larval tissue of multilocular Echinococcus.

Studies on Isolated Plant Protoplasts

Isolated tomato fruit protoplasts have been observed to take up both tobacco mosaic virus and ferritin by the process of pinocytosis. These studies have involved electron microscopic observations on thin sections of suitably fixed and embedded material. These electron microscopic studies have also shown that very close association exists between the nucleus and chloroplasts in these proto­ plas...

Studies of drugs given before anaesthesia. XXI. Droperidol.

Droperidol 5 mg and 10 mg and diazepam 10 mg were compared in premedication studies with morphine 10 mg and saline. Droperidol caused less hypnosis than either morphine or diazepam, and its use was associated with a much higher incidence of anxiety among patients than was observed in the group who had received saline only. Dizziness and restlessness were also significant features of the action ...