scholarly journals Use of NH4-form Chelex 100 Chelating Resin of Low lnduced Activities for Neutron Activation Analysis of Manganese in Sea Water

1974 ◽  
pp. 900-904 ◽  
Author(s):  
Akio HIROSE ◽  
Ken KOBORI ◽  
Daido ISHII
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Sea Water ◽  
Chelating Resin ◽  
Chelex 100

scholarly journals Neutron Activation Analysis of Trace Elements in Sea Water Samples

RADIOISOTOPES ◽  
1979 ◽  
Vol 28 (3) ◽  
pp. 139-144 ◽  
Author(s):  
Yuzuru KUSAKA ◽  
Haruo TSUJI ◽  
Sakingo IMAI ◽  
Sayoko OHMORI
Keyword(s):  
Trace Elements ◽  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Water Samples ◽  
Sea Water

Manganese-mediated morphogenesis in Penicillium claviforme and Penicillium clavigerum

1977 ◽  
Vol 23 (2) ◽  
pp. 209-212 ◽  
Author(s):  
Wayne H. Tinnell ◽  
Betty L. Jefferson ◽  
Robert E. Benoit
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Defined Medium ◽  
Chelating Resin ◽  
Colonial Morphology ◽  
Penicillium Claviforme

The colonial morphology and growth of Penicillium claviforme and P. clavigerum in manganese-deficient, defined medium, were examined with and without manganese supplementation. In unsupplemented medium rendered free of manganese through treatment with a chelating resin, P. claviforme grew but did not produce coremia. Similar results were obtained for P. clavigerum on media devoid of added manganese. However, when these media were supplemented with optimal concentrations of manganese both fungi produced coremia. The presence of manganese in various colony sections of P. claviforme was determined using neutron activation analysis. Maximal accumulation occurred in the conidia.

The uptake of gold by marine sponges

1968 ◽  
Vol 48 (2) ◽  
pp. 275-277 ◽  
Author(s):  
H. J. M. Bowen
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Recent Work ◽  
Sea Water ◽  
Marine Sponges

Gold has been determined in six marine sponges by neutron activation analysis. The amounts found (1·8–12·6 × 10−8 g/g dry sponge) are higher than would be expected from measurements of the distribution of 198Au between sea-water and dead sponge samples.Many attempts have been made to devise methods for concentrating gold from sea water, but none of them are commercially viable. Recent work has shown that gold can be concentrated by adsorption or absorption on certain artificial polymers (Hummel, 1957; Bowen, unpublished). This note describes some measurements of the accumulation of gold by marine sponges whose scleroprotein structure resembles some of the artificial polymers employed.

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