Edge Relaxation Research Articles

Adrenoceptors in the lung of the toad Bufo marinus: Regional differences in responses to amines and to sympathetic nerve stimulation

1. Responses of smooth muscle from the edges of pulmonary septa and from the lung wall of Bufo marinus were studied separately. 2. Adrenaline caused contraction of septal edge muscle and relaxation of lung wall muscle; both responses involved α-adrenoceptors. 3. Sympathetic nerve stimulation caused contraction followed by relaxation of the intact lung; contraction was more marked in, and sometimes the only response of, septal edge muscle. 4. A role of the sympathetic in regulating pulmonary gas exchange is discussed.

Electronic Properties of Titanium Monoxide

Electric, magnetic, and optical properties of the rocksalt form of titanium monoxide (TiO0.80 to TiO1.25) have been studied. TiO is metallic, exhibiting weak paramagnetism. Properties of TiO-phase samples are determined primarily by the relative concentration of titanium and oxygen atoms and to a lesser extent by sample preparation. The resistivity of TiO1 can be represented as the sum of an extremely large residual resistivity and a temperature-dependent part having positive slope. Although off-stoichiometric samples exhibit resistivity vs temperature variation not typical of metals, the entire phase can be characterized as metallic. Specular reflectance data suggest that the yellow color of TiO-phase samples is due to a plasma edge relaxation in the yellow region of the visible spectrum.

Non-polarizing electrodes for dielectric measurements on glasses

Sodium and sodium amalgam have been found to act as non-polarizing electrodes for soda glasses, and an electrode assembly is described which is suitable for accurate dielectric measurements. The elimination of edge relaxation effects by means of a guard ring was found to be essential. Comparative measurements with silver electrodes suggest that these do not act as simple blocking electrodes but that a diffusion layer arises of much greater thickness than the Debye length.