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Recently there has been a great surge of interest in almost-exact sum rules for the magnetic moments of nucleons. (By almost-exact we mean: exact to all orders in the strong couplings but only the lowest order in electromagnetic and weak couplings.) Besides providing a means for calculation of the magnetic moments on the same level as the calculation of GA/GV by Adler and Weisberger these sum rules, taken together with the Adler-Weisberger sum rule, constitute a useful tool for investigating the nature of the dynamical approximations that underlie higher symmetry schemes.

This volume is one of twenty-one summarizing the Aircraft Nuclear Propulsion Program of the General Electric Company.

It was the practice for several years to estimate the potential dose rate to the gastrointestinal from sanitary water sources by evaluating the results of radiochemical analysis of individual nuclides. The proposed method estimates the GI tract dose from Pasco and Richland domestic water from measurements of the total beta activity, and permits more frequent and more economical evaluation of a variable source of radiation exposure. Beginning with 1964 data, the GI tract dose rate for Richland and Pasco sanitary water has been obtained by multiplying the total beta count by a conversion factor derived from the historical relationship between the radiochemical analyses and the total beta counts. Either the accumulation of more data or changes in the relative abundance of the more significant nuclides in the water may result in changes in this factor.

Despite the presence of a large number of ganrma rays in gross fission products, the rather poor energy resolution of NaI detectors has limited the application of gamma scanning to the more prominent fission products. The advent of lithium-drifted germanium semiconductors makes it possible to perform more comprehensive analyses on these complex spectra. The high energy resolution of these detectors makes them attractive, despite their low efficiency.

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In a previous study the trimer of rhenium tetracarbonyl was found to be diamagnetic, suggesting the presence of hydrogen in the compound. This was supported by chemical analysis, which indicated about one hydrogen per rhenium, and the compound was formulated as [Re(C0)4H] 3• Subsequently a proton resonance was observed on a broad line spectrometer. In the original work the infrared spectra were compared for the hydride and deuteride; cyclohexane solutions were used for the CO stretching region and KBr discs were used for the rest of the spectrum. Surprisingly, the spectra of the hydride and deuteride showed only minor differences, insufficient to confirm the presence of hydrogen. No evidence of a hydrogen stretching frequency was found. In the present work, the previously unobserved Raman spectra were measured for the hydride and deuteride . In the solid state ratber striking shifts were observed in the CO stretching region. Also there is some evidence for a metal-hydrogen stretching band at the rather low frequency of 1100 cm-1. In an attempt to support the interpretation of the Raman spectra more detailed infrared studies of the solid in KBr discs were made. The hope was to observe a metal-hydrogen stretching frequency and to explain …

There is no evidence to suggest that the adrenal medulla plays a significant role in the production or maintenance of renal hypertension. The decisive experiment was made by Goldblatt and collaborators/who successfully produced experimental hypertension in dogs by renal artery constriction despite the surgical removal of·one entire adrenal and the medulla of the other.

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