The Sodium and Potassium Content of Sea Water

1939 ◽  
Vol 16 (2) ◽  
pp. 178-183
Author(s):  
D. A. WEBB
Keyword(s):  
Sea Water ◽  
Potassium Content ◽  
Sodium And Potassium

The sodium and potassium content of sea water have been re-determined. The following values are suggested: K/Cl=0.02009±0.0002; Na/Cl=0.5549±0.001.

scholarly journals THE EXTRACELLULAR RELEASE OF ECHINOCHROME

1946 ◽  
Vol 29 (5) ◽  
pp. 267-275 ◽  
Author(s):  
Herbert Shapiro
Keyword(s):  
Sea Urchin ◽  
Sea Water ◽  
Potassium Content ◽  
Red Pigment ◽  
Anaerobic Conditions ◽  
Outward Diffusion ◽  
Arbacia Punctulata ◽  
Extracellular Release

A study was made of the diffusion of the red pigment echinochrome from the eggs of the sea urchin, Arbacia punctulata, into sea water. Unfertilized eggs retained their pigment, over periods of hours. Outward diffusion of pigment from unfertilized eggs normally is entirely negligible, or does not occur at all. Enchancing the calcium or potassium content of the artificial sea water (while retaining isosmotic conditions) did not induce pigment release. Under anaerobic conditions, unfertilized eggs release pigment in small quantities. Fertilization alone brings about echinochrome release. Fertilized eggs invariably released pigment, whether in normal sea water, or sea water with increased calcium or potassium. This diffusion of the pigment began during the first cleavage, possibly soon after fertilization. The pigment release is not a consequence solely of the cell's permeability to echinochrome (or chromoprotein, or other pigment combination) but is preceded by events leading to a release of echinochrome from the granules in which it is concentrated within the cell. These events may be initiated by activation or by anaerobiosis. The phenomenon was not due to cytolysis.

scholarly journals CHANGES IN THE POTASSIUM CONTENT OF SEA URCHIN EGGS ON FERTILIZATION

1951 ◽  
Vol 34 (3) ◽  
pp. 285-293 ◽  
Author(s):  
Anna Monroy Oddo ◽  
Maria Esposito
Keyword(s):  
Sea Urchin ◽  
Sea Water ◽  
Paracentrotus Lividus ◽  
Potassium Content ◽  
Minimum Point ◽  
Sea Urchin Eggs ◽  
Maximum Loss ◽  
Arbacia Lixula

In the eggs of Arbacia lixula and Paracentrotus lividus an uptake of K occurs during the first 10 minutes following fertilization. Between 10 and 40 minutes K is then released. Both in Arbacia and in Paracentrotus the minimum point of the curve coincides with the nuclear streak stage. A maximum loss of 25 per cent in Arbacia and 20 per cent in Paracentrotus with respect to the amount present in the unfertilized eggs has been found. From 40 minutes up to 1 hour K undergoes a further increase and when the first cleavage sets in the same amount of K is present as in the unfertilized eggs. By treating the eggs with K-free artificial sea water it has been established that about 60 per cent of the K content of the eggs is in a non-diffusible condition. Also under such conditions the eggs when fertilized are able to take up even the very small amount of K present in the medium that was released by them prior to fertilization.

scholarly journals The use of electro-gustometry to assess the functional state of the adrenal glands

1981 ◽  
Vol 62 (5) ◽  
pp. 34-36
Author(s):  
E. S. Halfen ◽  
A. D. Tryapyshko
Keyword(s):  
Blood Glucose ◽  
Adrenal Insufficiency ◽  
Approximate Method ◽  
Functional State ◽  
Adrenal Glands ◽  
Potassium Content ◽  
Daily Excretion ◽  
Sodium And Potassium

Comparison of electro-gustometry data and the results of blood glucose studies, sodium and potassium content in saliva and blood, daily excretion of 17-ketosteroids in healthy and sick patients showed that electro-gustometry can be used as a simple approximate method for detecting adrenal insufficiency.

Sodium and potassium in pig muscle

1963 ◽  
Vol 61 (3) ◽  
pp. 409-410 ◽  
Author(s):  
R. A. Lawrie ◽  
R. W. Pomeroy
Keyword(s):  
Muscle Mass ◽  
Rectus Femoris ◽  
Potassium Content ◽  
Longissimus Dorsi ◽  
Pig Muscle ◽  
Psoas Major ◽  
Extensor Carpi Radialis ◽  
Sodium And Potassium ◽  
Total Muscle ◽  
Lateral Head

1. The sodium and potassium content of longissimus dorsi (lumbar), psoas major, rectus femoris, triceps (lateral head) and extensor carpi radialis from 6 pigs each at pork, bacon and manufacturing weights were determined: these varied significantly and systematically between muscles and between groups.2. Since the concentration of potassium may differ by at least 30% between muscles, it is concluded that assessment of total muscle mass may be inaccurate if based on the integration ofγ-ray emission from 40K.

Effect of Hypertension on Arterial Wall Electrolytes During Desoxycorticosterone Administration

1957 ◽  
Vol 189 (3) ◽  
pp. 451-454 ◽  
Author(s):  
Louis Tobian ◽  
Paul D. Redleaf
Keyword(s):  
Arterial Wall ◽  
Renal Hypertension ◽  
Sodium Content ◽  
Potassium Content ◽  
Sodium Restriction ◽  
Potassium Sodium ◽  
Experimental Renal Hypertension ◽  
Per Se ◽  
Sodium And Potassium

Administration of desoxycorticosterone and NaCl resulted in an increased sodium and potassium content of the aorta in rats becoming severely hypertensive. Equivocally hypertensive animals on this regimen showed smaller increases in sodium and a decrease in potassium. Sodium restriction prevented both hypertension and changes in arterial wall chemistry from occurring in rats receiving desoxycorticosterone. Hypertension per se may be fundamentally associated with an increased potassium and sodium content in artery, as experimental renal hypertension is characterized by a similar electrolyte alteration.

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