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Biomedical subjects

M Jacobson

Publications and source records attributed to M Jacobson.

At least 217 records · Page 12Linked to original sources
PubMed1969

Sex pheromone of the pink bollworm moth: biological masking by its geometrical isomer.

A mixture of the cis and trans forms of propylure (10-propyl-trans-5,9-tridecadienyl acetate), the sex pheromone of the female pink bollworm moth, has been separated into its pure isomers by thin-layer chromatography. The cis isomer inhibits or masks the activity of the trans isomer, as little as 15 percent of the cis isomer being sufficient to completely nullify the activity of the trans isomer.

Alcohols↗
PubMed1968

Neuronal specification of cutaneous nerves through connections with skin grafts in the frog.

Skin grafts were rotated 180 degrees in frog tadpoles. After metamorphosis, cutaneous reflexes were tested, and the receptive fields of cutaneous nerves were mapped electrophysiologically. Accurately localized limb movements were elicited by mechanical stimulation of normal skin, or of dorsal skin reimplanted on the back after 180-degree rotation. Reflexes misdirected to the original site of the stimulated skin were elicited from dorsoventrally inverted grafts, but not from anteroposteriorly inverted grafts. In most cases, the local nerves supplied the grafts, and each nerve entered the skin within its own receptive field. This observation eliminated the possibility that misdirected reflexes were due to selective regrowth of cutaneous nerves. We concluded that cutaneous nerves formed central synaptic associations which were specified by their new terminal connections with grafted skin.

Action Potentials↗