scholarly journals Distribution of Radionuclides among Green Alga, Marine Sediments and Sea Water

1977 ◽  
Vol 18 (4) ◽  
pp. 322-330 ◽  
Author(s):  
R. NAKAMURA ◽  
Y. SUZUKI ◽  
T. UEDA
Keyword(s):  
Green Alga ◽  
Marine Sediments ◽  
Sea Water

The Yorkshire Dogger: III. Upper Eskdale

1943 ◽  
Vol 80 (6) ◽  
pp. 209-230 ◽  
Author(s):  
R. H. Rastall ◽  
J. E. Hemingway
Keyword(s):  
Shallow Water ◽  
Sea Level ◽  
Marine Sediments ◽  
Sea Water ◽  
Second Phase ◽  
Faunal Assemblage ◽  
Chemical Changes ◽  
Main Series ◽  
Uplift And Erosion ◽  
Shallow Water Sediments

1. A sequence of strata is determined in the Dogger of Upper Eskdale and its tributary valleys. The rocks fall into three main series, which are subdivided into groups.2. The underlying Yeovilian sediments, originally included with the Dogger, are mapped and briefly described. The unconformity between them and the Dogger is emphasized.3. The Dogger is marine throughout but only the oldest yields an adequate faunal assemblage, similar to that of the Glaisdale Oolite Series (upper opalinum). The greater part of the Dogger of this area is therefore younger than that of the Yorkshire Coast.4. Chemical changes in the sea-water caused the deposition of siderite to characterize the earliest phase (Glaisdale Oolite Series). This was succeeded by a phase of dominantly chamosite deposition (the Chamositic Series) followed by a reversion to siderite deposition (the Ajalon Series).5. Earth-movement controlled sedimentation over the area. During the first phase an eastern tilt to the region held the centre and west above or near sea-level, where it received no sediment. The second phase saw general depression with the accumulation of shallow water sediments. This was followed by uplift and erosion when a broad shallow valley was cut. Partial depression then flooded the valley with derived marine sediments.

Influence of major cations of sea water on the desorption of137Cs from marine sediments

1994 ◽  
Vol 187 (3) ◽  
pp. 197-205 ◽  
Author(s):  
D. V. M. Desai ◽  
Sathi S. Kumar ◽  
K. C. Pillai
Keyword(s):  
Marine Sediments ◽  
Sea Water ◽  
Major Cations

Utilization of sea water–urea as a culture medium for Spirulina maxima

1979 ◽  
Vol 25 (6) ◽  
pp. 752-759 ◽  
Author(s):  
Onil Faucher ◽  
Bernard Coupal ◽  
Anh Leduy
Keyword(s):  
Green Alga ◽  
Culture Medium ◽  
Sea Water ◽  
Synthetic Medium ◽  
Blue Green Alga ◽  
Spirulina Maxima ◽  
Partial Decomposition ◽  
Inhibition Effect ◽  
Open Pond ◽  
Alkali Medium

The possibilities of utilization of seawater enriched with urea as the culture medium for a blue-green alga, Spirulina maxima, were investigated. Pretreatment by precipitation with NaHCO3 and (or) Na2CO3 was found essential to remove the excess amounts of Ca2+ and Mg2+ present in seawater prior to cultivation. A culture medium as good as the synthetic medium reported in the literature for the growth of S. maxima was obtained after treating seawater with NaHCO3 (19.2 g/L) at pH 9.2 and 35 °C for 2 h, filtering to remove precipitates, and enriching with K2HPO4 (0.5 g/L), NaNO3 (3.0 g/L), and FeSO4 (0.01 g/L). The same results were obtained by substituting a small amount (0.2 g/L or less) of either crystalline or polymerized urea for the NaNO3 in the above medium. Growth of S. maxima was inhibited at higher concentration s of urea in the culture medium. The inhibition effect was due to the partial decomposition of urea into ammonia in alkali medium. Tests conducted on the 130-L cultivation open pond also confirmed that the seawater–urea medium supports growth of S. maxima as well as the best known synthetic medium.

Chromatographic Analysis of Hydrocarbons in Marine Sediments and Sea water

1975 ◽  
Vol 13 (11) ◽  
pp. 535-540 ◽  
Author(s):  
W. E. May ◽  
S. N. Chesler ◽  
S. P. Cram ◽  
B. H. Gump ◽  
H. S. Hertz ◽  
...  
Keyword(s):  
Marine Sediments ◽  
Chromatographic Analysis ◽  
Sea Water

The occurrence of thallium in sea water and marine sediments

1970 ◽  
Vol 6 ◽  
pp. 149-152 ◽  
Author(s):  
A.D. Matthews ◽  
J.P. Riley
Keyword(s):  
Marine Sediments ◽  
Sea Water
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