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- W1966989842 abstract "Abstract Ultrastructural estimation of the relative volume of the interstitial space in guinea pig cerebral cortex slices incubated under various experimental conditions has been made. The interstitial space volume was 3% in a slice incubated aerobically for 10 min in a medium enriched with 10 m M glucose as well as in an unincubated slice suspended in a medium lacking glucose. Under the optimal condition of 20 min aerobic incubation in a medium containing 10 m M glucose, the interstitial space volume was 7.5%. It was also 7.5% after 20 min anaerobiosis. However, the volume of intracellular compartment was much larger in the anaerobically-incubated slices. With longer aerobic incubation, the interstitial space volume was increased, reaching 13% at 1 h. The alterations in the size of the interstitial space caused by deprivation of glucose, or both glucose and oxygen were studied. The interstitial space volume was also determined in slices incubated in the presence of l -glutamic acid as substrate or in the combined presence of glucose and l -glutamic acid. Measurements were made of the astrocytic cytoplasm volume in electron micrographs prepared from slices incubated under optimal conditions. It is suggested that the extracellular space estimated by biochemical methods includes both the true interstitial space and the fluid compartment represented by astrocytic cytoplasm. This inclusion of astrocytic cytoplasm into a functional extracellular space is consistent with previously-reported ultrastructural evidence for a high sodium content of cortical astrocytes." @default.
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- W1966989842 date "1971-03-01" @default.
- W1966989842 modified "2023-09-27" @default.
- W1966989842 title "Ultrastructural estimation of relative volume of extracellular space in brain slices" @default.
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- W1966989842 doi "https://doi.org/10.1016/0022-510x(71)90063-3" @default.
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