John E Noakes

Benzene synthesis by low temperature catalysis for radiocarbon dating

Abstract A method is described for the ambient temperature synthesis of pure benzene from acetylene in 50–60 per cent yields that is suitable for low-level liquid scintillation counting. Application of this method to carbon dating essentially eliminates previous problems encountered in the use of liquid scintillation counting for this purpose. The method extends the sensitivity of the carbon dating method and yet requires only standard commercially available counting systems.

Boron-boric acid complexes in sea-water

Abstract Boron in the Gulf of Mexico, in the forms of total, inorganic and organic complexes, was evaluated using a mannitol titrometric method. Definite correlation between inorganic boron and chlorinity was observed for sea water, both vertically and horizontally, except in the oxygen minimum region. Similar, but less-defined correlation, is found to exist between the organic boron complexes and oxygen distribution. A preliminary investigation using boron-chlorinity ratios for identification of water masses and possible detection of circulatory patterns was made on the deep water of the Caribbean. Data from the Venezuela, Columbia, Cayman, and Gulf basins all showed conservative boron-chloride ratios. Analysis of the data indicates a uniformity of deep basin waters of the American Mediterranean Sea, which suggests the existence of a single source of deep water or uniform mixing between the basins.

University of Georgia radiocarbon dates IV.

Carbon-14 dates, bone, shell, wood and charcoal, samples from United States sites; for reference to part I, see this Bibliography Vol. 35, No. 10, 06 E71-30299.

Oak Ridge Associated Universities radiocarbon dates II.

Geologic samples from Campeche bank (Mexico offshore) and Shark bay (Western Australia), archeologic samples from Tennessee (USA) and Korea.