Richard F. Baker

Learn More
The change in the transverse impedance of the squid giant axon caused by direct current flow has been measured at frequencies from 1 kc. per second to 500 kc. per second. The impedance change is equivalent to an increase of membrane conductance at the cathode to a maximum value approximately the same as that obtained during activity and a decrease at the(More)
Longitudinal alternating current impedance measurements have been made on the squid giant axon over the frequency range from 30 cycles per second to 200 kc. per second. Large sea water electrodes were used and the inter-electrode length was immersed in oil. The impedance at high frequency was approximately as predicted theoretically on the basis of the(More)
Using data collected with the CLEO II detector we have performed a search for direct CP violation in the Ξ hyperon system. CP violation gives rise to an asymmetry, A, between the parity-violating angular distributions of the decay chains Ξ → Λπ, Λ → pπ and Ξ̄ → Λ̄π, Λ̄ → p̄π. In the Standard Model, A ≈ 10 to 10. If CP violation were found at a higher level(More)
We have studied two-body charmless hadronic decays of B mesons into the final states ππ, Kπ, and KK. Using 3.3 million BB̄ pairs collected with the CLEO-II detector, we have made the first observation of the decays B → Kπ, B → Kπ, and the sum of B → ππ and B + → Kπ decays (an average over charge-conjugate states is always implied). We place upper limits on(More)
The uptake of glutaraldehyde by human red blood cells has been measured as a function of time by a freezing point osmometer. The rate of attachment of glutaraldehyde to the cell proteins is high over the first hour, declining to zero over a period of a few days. The number of glutaraldehyde molecules cross-linking with each hemoglobin molecule is of the(More)
The chemical and enzymatic composition and the respiratory components of an intact membrane preparation, ghosts from Mycobacterium phlei, were compared to those of the electron transport particles. The ghosts were found to contain 5 to 7% of some of the soluble enzymes associated with the cytoplasm. In contrast, 97% of the total content of cytochromes b, cl(More)
The electron microscopy of sections of isolated cells, such as tissue culture cells, white cells, or red blood cells, presents special problems in handling and orientation. When it is desired to retain the original relationship between cells, as, for example, tissue culture cells growing on a glass surface, it is necessary to process and embed the cells in(More)