Effect of acetate on hepatic inorganic ion content

1988 ◽  
Vol 16 (4) ◽  
pp. 577-578
Author(s):  
WILLIAM L. GITOMER ◽  
RICHARD L. VEECH
Keyword(s):  
Ion Content ◽  
Inorganic Ion

scholarly journals cAMP activates the sodium pump in cultured cells of the elasmobranch rectal gland.

1992 ◽  
Vol 2 (10) ◽  
pp. 1523-1528
Author(s):  
S Lear ◽  
B J Cohen ◽  
P Silva ◽  
C Lechene ◽  
F H Epstein
Keyword(s):  
Sodium Pump ◽  
Cultured Cells ◽  
Chloride Content ◽  
Squalus Acanthias ◽  
Rectal Gland ◽  
Dibutyryl Camp ◽  
Ion Content ◽  
Electron Probe Analysis ◽  
Inorganic Ion ◽  
Shark Rectal Gland

The inorganic ion content of rectal gland cells cultured from Squalus acanthias was studied by electron probe analysis in order to determine the effect of stimulation by cAMP. Cell sodium was reduced by 30% (P less than 0.01) at 8 min after exposure to dibutyryl cAMP and theophylline and remained low at 25 and 33 min. Chloride content also fell significantly with stimulation. Although cAMP may activate several transport sites, the results are consistent with a direct effect of stimulation to increase the activity of the sodium pump in shark rectal gland.

Isosmotic Regulation in Various Tissues of the Diamondback Terrapin Malaclemys Centrata Centrata (Latreille)

1973 ◽  
Vol 59 (1) ◽  
pp. 39-43
Author(s):  
M. GILLES-BAILLIEN
Keyword(s):  
Amino Acids ◽  
Osmotic Pressure ◽  
Sea Water ◽  
Amino Acid Content ◽  
Inorganic Ions ◽  
Total Amino Acid ◽  
Diamondback Terrapin ◽  
Ion Content ◽  
Inorganic Ion ◽  
Total Amino Acid Content

1. Osmotic adjustment is achieved by blood and intracellular fluids in the diamond-back terrapin when acclimatized either to fresh water or to sea water. 2. The muscle adjusts its composition to a higher blood osmotic pressure by greater concentrations in ammonia, in taurine and in urea and to a lesser extent in all amino acids (aspartate excepted). The inorganic ion content is not affected. 3. In the bladder mucosa ammonia, taurine and all amino acids are more concentrated in sea-water animals. But essentially urea is responsible for the higher osmotic pressure. Of the inorganic ions only potassium shows a (slight) increase in sea-water animals. 4. In the colon mucosa there is a slight increase in the total amino acid content, in the concentrations of sodium and chloride, and a larger increase in urea. 5. In the jejunum mucosa the concentrations of amino acids, urea and K are much higher in sea-water animals. 6. The results are discussed within the framework of isosmotic regulation of intracellular fluids.

Inorganic ion content of fungal mycelia and spores

1974 ◽  
Vol 20 (7) ◽  
pp. 935-936 ◽  
Author(s):  
David K. Dalby ◽  
William D. Gray
Keyword(s):  
Aspergillus Niger ◽  
Mineral Elements ◽  
Penicillium Roqueforti ◽  
Ion Content ◽  
Inorganic Ion ◽  
Zinc Concentrations ◽  
Penicillium Claviforme ◽  
Fungal Mycelia

Inorganic ion analyses were made on the mycelia and spores of five fungi: Linderina pennispora, Aspergillus niger, Spicaria elegans, and Penicillium claviforme and Penicillium roqueforti. The concentration of mineral elements in spores and mycelia of the five fungi varied with each element. The amount of Cu was consistently higher in spores than in mycelia. Zinc concentrations were higher in mycelia than in spores with the exception of A. niger. The concentration of Mg was higher in mycelia than in spores of the five species with the exception of L. pennispora. As with Mg, K concentrations varied considerably.

Towards an appreciation of fern edaphic niche requirements

1985 ◽  
Vol 86 ◽  
pp. 93-103 ◽  
Author(s):  
Raymond L. Petersen
Keyword(s):  
Soil Ph ◽  
Mineral Content ◽  
Inorganic Ions ◽  
Soil Nutrient ◽  
Pteridium Aquilinum ◽  
Growth Responses ◽  
Ion Content ◽  
Inorganic Ion ◽  
Species Specific

SynopsisThis assessment of selected literature on pteridophyte edaphic adaptation is presented in three parts: (1) pH and general soil nutrient background, (2) growth responses to specific inorganic ions and frond mineral content, and (3) collected works on Pteridium aquilinum edaphic adaptations. In this report, a case is made for the overriding effect of both soil pH and inorganic ion content in determining pteridophyte occurrence. Recommendations are made for more field and laboratory co-ordinated studies, especially as they pertain to the determination of species-specific amplitudes of adaptation, and for the initiation of physiological and metabolic investigations into the basis of these edaphic adaptations.

REGULATION OF THE INORGANIC ION CONTENT OF CELLS

1961 ◽  
Vol 242 (2) ◽  
pp. 131
Author(s):  
G. E. W. WOLSTENHOLME ◽  
CECILIA M. O??CONNOR
Keyword(s):  
Ion Content ◽  
Inorganic Ion

The inorganic ion content of native aquatic bacteria

1999 ◽  
Vol 45 (4) ◽  
pp. 304-311 ◽  
Author(s):  
Kjell Magne Fagerbakke ◽  
Svein Norland ◽  
Mikal Heldal
Keyword(s):  
Marine Bacteria ◽  
Chloride Concentration ◽  
Inorganic Ions ◽  
Ion Content ◽  
X Ray ◽  
Carbon And Nitrogen ◽  
Inorganic Ion ◽  
Transmission Electron ◽  
Cell Turgor ◽  
Cultured Bacteria

In this study we have quantified the ionic content and volume of native aquatic, and two cultured bacteria, by X-ray microanalysis (XRMA) in the transmission electron microscope (TEM). The cellular concentrations of magnesium (means of 630 and 710 mM) were more than an order of a magnitude higher than the outside concentrations. The internal concentrations of sodium were on average 50-180 mM, and the [K+]/[Na+] ratios were in the range of 0.1-0.5; lowest for apparently nonactive bacteria. Magnesium and chloride probably act as the major components of cell turgor, since no other inorganic ions were present in comparable amounts. Our carbon and nitrogen measurements indicated that organic solutes are not likely to be present at significant concentrations. The estimated charge of inorganic ions (Na, Mg, P, Cl, K, and Ca) gave a positive net internal charge for most cells. However, in cultures of Vibrio natriegens, the high internal chloride concentration made the net inorganic charge negative in these cells. Our results suggest that growing marine bacterioplankton have an internal environment in which magnesium is the dominating cation. These results suggest that actively growing marine bacteria are physiologically adapted to high internal concentrations of both magnesium and chloride.Key words: X-ray microanalysis, magnesium, osmolyte, marine bacteria.

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