Microchemical Studies on Plant Components. XXXVII

Notes on Some Remedies. XXXVII. Penicillin

easily given intramuscularly without discomfort. Doses less than 20,000 units should not be used. The standard dose of procaine penicillin is 300,000 units and for oral use the dose should be at least five times the intramuscular dose. The dose for infants and young children is, generally speaking, 4,000 units per pound of expected body weight per 24 hours. Chronic infections are more resistant...

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 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...

Microchemical identification of amidone.