Shipboard calibration of an infrared absorption gas analyser for total carbon dioxide determination in sea water

1982 ◽  
Vol 38 (3) ◽  
pp. 131-136 ◽  
Author(s):  
Satoru Kanamori
Keyword(s):  
Carbon Dioxide ◽  
Infrared Absorption ◽  
Sea Water ◽  
Total Carbon

scholarly journals Time course of the establishment of uterine seawater conditions in late-term pregnant spiny dogfish (Squalus acanthias)

1988 ◽  
Vol 137 (1) ◽  
pp. 443-456
Author(s):  
G. A. Kormanik
Keyword(s):  
Carbon Dioxide ◽  
Partial Pressure ◽  
Time Course ◽  
Sea Water ◽  
Ammonia Concentration ◽  
Squalus Acanthias ◽  
Total Carbon ◽  
Spiny Dogfish ◽  
Ionic Form ◽  
Carbon Dioxide Content

The gestation period for embryos of the spiny dogfish, Squalus acanthias (L.) lasts for nearly 2 years. During the latter part of this period the pups remain in the uterus and the fluid surrounding the embryos resembles sea water with respect to the major ions, but is low in pH (approx. 6), high in partial pressure of carbon dioxide (approx. 3 mmHg; 1 mmHg = 133.3 Pa), low in total carbon dioxide content (approx. 0.2 mmol l-1), and may have a total ammonia concentration of up to 22 mmol l-1. Thus the conditions under which the pups complete their development in utero is quite remarkable. The derivation of these conditions was examined in late-term pregnant females, from whose uterine horns the pups had been removed, by monitoring changes that occurred in instilled uterine sea water. The mother is responsible for reducing the pH, reducing the total carbon dioxide content and elevating the partial pressure of carbon dioxide to the levels observed in fresh-caught females, in less than 24 h. The ammonia concentration is also elevated, but this takes rather longer. The decreased pH is responsible for the accumulation of ammonia in the uterine sea water, and it also serves to protect the pups from the toxic effects of NH3, by converting it to the relatively non-toxic ionic form, NH4+. The reasons for the establishment of these uterine seawater conditions are still not evident.

scholarly journals Pretreatment apparatus for determination of total carbon dioxide in sea water and in decarbonated sea water

1974 ◽  
Vol 23 (3) ◽  
pp. 260-264 ◽  
Author(s):  
Kunio SUGINO ◽  
Hiroshi KITAMURA ◽  
Kenzaburo OBATA
Keyword(s):  
Carbon Dioxide ◽  
Sea Water ◽  
Total Carbon

The Inorganic Composition of the Blood of Mytilus Edulis and Anodonta Cygnea

1954 ◽  
Vol 31 (3) ◽  
pp. 376-385
Author(s):  
W. T. W. POTTS
Keyword(s):  
Carbon Dioxide ◽  
Mytilus Edulis ◽  
Sea Water ◽  
Total Concentration ◽  
Total Carbon ◽  
Anodonta Cygnea ◽  
Ionic Solutions ◽  
Order Of Magnitude ◽  
Inorganic Composition ◽  
Inorganic Constituents

1. Analyses have been made of the inorganic constituents of the blood of Mytilus edulis and Anodonta cygnea. 2. Mytilus blood resembles sea water in total concentration and composition, but has greater concentrations of calcium, potassium and total carbon dioxide. 3. Anodonta blood has a very low total concentration of solutes, but the concentrations of calcium and carbon dioxide are of the same order of magnitude as the concentrations in Mytilus blood. 4. This is discussed with reference to solubility of calcium carbonate in ionic solutions, and it is concluded that the blood of both animals is saturated with respect to aragonite.

Impact of Dursban and Abate on Microbial Numbers and Some Chemical Properties of Standing Ponds

1975 ◽  
Vol 10 (1) ◽  
pp. 33-41 ◽  
Author(s):  
J. Butcher ◽  
M. Boyer ◽  
CD. Fowle
Keyword(s):  
Carbon Dioxide ◽  
Active Ingredient ◽  
Algal Blooms ◽  
Chemical Properties ◽  
Total Carbon ◽  
Dissolved Carbon ◽  
Photosynthetic Productivity ◽  
Dissolved Carbon Dioxide ◽  
Microbial Numbers

Abstract Eleven small ponds, lined with polyethylene, were used to assess the consequences of applications of *DursbanR at 0.004, 0.030, 0.100 and 1.000 ppm and AbateR at 0.025 and 0.100 ppm active ingredient. The treated ponds showed a more pronounced long-term increase in pH and dissolved oxygen and decreasing total and dissolved carbon dioxide in comparison with untreated ponds. Algal blooms were of longer duration in treated ponds than in controls. Total photosynthetic productivity was higher in treated ponds but bacterial numbers did not change significantly. Photosynthetic productivity was estimated by following the changes in total carbon dioxide.

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