ELECTROLYTE METABOLISM IN THE RAT EXPOSED TO A LOW ENVIRONMENTAL TEMPERATURE. II

1960 ◽  
Vol 38 (1) ◽  
pp. 205-211
Author(s):  
D. G. Baker
Keyword(s):  
Water Content ◽  
Environmental Temperature ◽  
Subcutaneous Tissue ◽  
Intracellular Sodium ◽  
Total Water Content ◽  
Extracellular Water ◽  
Total Water ◽  
Electrolyte Metabolism ◽  
Exposure To Cold ◽  
Superficial Muscle

Rats acclimatized to cold (2 °C) have lower subcutaneous tissue and superficial muscle temperatures than comparable animals living at 25 °C. The total water content of the skin is significantly increased after acclimatization to cold. This increase is due to an increase in the chloride space. The total water content of muscle was decreased in the rats acclimatized to cold although the chloride space (extracellular water) was increased. The intracellular sodium of muscle was decreased by exposure to cold.

ELECTROLYTE METABOLISM IN THE RAT EXPOSED TO A LOW ENVIRONMENTAL TEMPERATURE. II

1960 ◽  
Vol 38 (3) ◽  
pp. 205-211 ◽  
Author(s):  
D. G. Baker
Keyword(s):  
Water Content ◽  
Environmental Temperature ◽  
Subcutaneous Tissue ◽  
Intracellular Sodium ◽  
Total Water Content ◽  
Extracellular Water ◽  
Total Water ◽  
Electrolyte Metabolism ◽  
Exposure To Cold ◽  
Superficial Muscle

Rats acclimatized to cold (2 °C) have lower subcutaneous tissue and superficial muscle temperatures than comparable animals living at 25 °C. The total water content of the skin is significantly increased after acclimatization to cold. This increase is due to an increase in the chloride space. The total water content of muscle was decreased in the rats acclimatized to cold although the chloride space (extracellular water) was increased. The intracellular sodium of muscle was decreased by exposure to cold.

ELECTROLYTE METABOLISM IN THE RAT EXPOSED TO A LOW ENVIRONMENTAL TEMPERATURE

1957 ◽  
Vol 35 (1) ◽  
pp. 631-636 ◽  
Author(s):  
D. G. Baker ◽  
E. A. Sellers
Keyword(s):  
Water Content ◽  
Blood Volume ◽  
Total Body Water ◽  
Room Temperature ◽  
Environmental Temperature ◽  
Prolonged Exposure ◽  
Chloride Concentration ◽  
Electrolyte Metabolism ◽  
Exposure To Cold ◽  
Total Body

Some aspects of electrolyte metabolism in the rat exposed to a low environmental temperature have been examined. The first day of exposure at 2 °C. was accompanied by a loss of chloride. Continued exposure to cold resulted in a retention of sodium, and to a lesser extent, of potassium. Exposure to cold for 45 days (at 2 °C.) caused a sustained elevation of concentration of sodium in the plasma, with a transient increase in potassium and no change in the chloride concentration. Prolonged exposure to cold resulted in an increased blood volume and total body water content. These observations suggest that the rats acclimatized to cold have a larger proportion of actively metabolizing tissues than do comparable animals at room temperature.

ELECTROLYTE METABOLISM IN THE RAT EXPOSED TO A LOW ENVIRONMENTAL TEMPERATURE

1957 ◽  
Vol 35 (8) ◽  
pp. 631-636 ◽  
Author(s):  
D. G. Baker ◽  
E. A. Sellers
Keyword(s):  
Water Content ◽  
Blood Volume ◽  
Total Body Water ◽  
Room Temperature ◽  
Environmental Temperature ◽  
Prolonged Exposure ◽  
Chloride Concentration ◽  
Electrolyte Metabolism ◽  
Exposure To Cold ◽  
Total Body

Some aspects of electrolyte metabolism in the rat exposed to a low environmental temperature have been examined. The first day of exposure at 2 °C. was accompanied by a loss of chloride. Continued exposure to cold resulted in a retention of sodium, and to a lesser extent, of potassium. Exposure to cold for 45 days (at 2 °C.) caused a sustained elevation of concentration of sodium in the plasma, with a transient increase in potassium and no change in the chloride concentration. Prolonged exposure to cold resulted in an increased blood volume and total body water content. These observations suggest that the rats acclimatized to cold have a larger proportion of actively metabolizing tissues than do comparable animals at room temperature.

scholarly journals Indicators of the water regime of some varieties of chrysanthemums in the conditions of the South Ural

2021 ◽  
Vol 10 (1) ◽  
pp. 57-64
Author(s):  
Svetlana Galimullovna Denisova ◽  
Antonina Anatolyevna Reut
Keyword(s):  
Water Content ◽  
Water Deficit ◽  
Water Regime ◽  
Water Holding Capacity ◽  
Research Centre ◽  
Total Water Content ◽  
Total Water ◽  
The South ◽  
Irreversible Damage ◽  
Water Holding

In introduction studies, it is of great importance to determine how favorable the water balance of the studied species is under given environmental conditions. The aim of the research was to study the water regime of some varieties of chrysanthemums in the conditions of the Southern Ural. The study was conducted in 20182020 on the basis of the South-Ural Botanical Garden-Institute of the Ufa Federal Research Centre of Russian Academy of Sciences. The objects of the study were 23 varieties of Chrysanthemum hortorum Bailey. In the course of the research, the total water content, water-holding capacity, the content of mobile moisture, water deficit, and sublethal water deficit were determined. The analysis of water regime indicators is based on the method of artificial wilting (V.N. Tarenkov, L.N. Ivanova) and the method of saturation of plant samples (V.P. Moiseev, N.P. Reshetsky). Sublethal water deficit was determined by the method of T.K. Goryshina, L.I. Samsonova, modified by N.I. Bobrovskaya. The calculations were carried out by standard methods using statistical packages of the Microsoft Excel 2003 and the Agros 2.13 program. The studies made it possible to determine the value of the sublethal water deficit (28,4%) for the varieties of chrysanthemums in the conditions of the Bashkir Ural. It was found that the studied varieties during the growing season did not experience such a moisture deficit in the tissues that could lead to irreversible damage to the assimilating organs. Our experiments showed that chrysanthemum varieties in the Bashkir Cis-Ural under the same soil-climatic and agrotechnical conditions had the following range of indicators of total water content 70,090,4% and water-holding capacity 19,0064,6%. The analysis of variance revealed significant differences between water-holding capacity and the content of mobile moisture by varieties, the share of influence was 27,8531,71%. As a result of the correlation-regression analysis, the authors revealed a direct dependence of the indicators of mobile moisture content on the total water content, and an inverse one on the indicators of the content of mobile moisture and water-holding capacity.

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