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Abstract Tissue from the hepatopancreas (digestive diverticula) of 13 bivalve species from the North American east coast was studied with respect to activity of three groups of carbohydrases, i.e.… (More)
Summary The Precambrian Kisii Series in Western Kenya is unmetamorphosed and contains andesites, rhyolites, quartzites and basalts. The basalts, for which a minimum K-Ar age of 930 My is cited,… (More)
Abstract Of 16 sites collected in the Taru grits (Permian) and Maji ya Chumvi beds (Permo-Triassic) of East Africa only 6 sites from the Maji ya Chumvi sediments gave meaningful palaeomagnetic… (More)
Since type B hepatitis is generally regarded as an occupational risk for dentists, the participants at the 1976 annual meeting of the Danish Dental Association were examined for hepatitis B surface… (More)
Summary An apparent polar wander path for the Late Precambrian of Africa is proposed. It is defined by new data from Kenya and Tanzania covering the period 800 My to 1000 or 1100 My, and with an… (More)