Results 291 to 300 of about 46,095 (333)
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Experimental Gerontology, 1972
Abstract The whole blood viscosity was determined as a function of the shear rate for young and old subjects. The results of these studies indicate that a definite difference does exist in the viscosity of whole blood. This difference is related to the age, morphology, mean corpuscular volume and hemoglobin content of the red cell.
L C, Cerny, F B, Cook, F, Valone
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Abstract The whole blood viscosity was determined as a function of the shear rate for young and old subjects. The results of these studies indicate that a definite difference does exist in the viscosity of whole blood. This difference is related to the age, morphology, mean corpuscular volume and hemoglobin content of the red cell.
L C, Cerny, F B, Cook, F, Valone
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Erythrocyte deformability in aging
Mechanisms of Ageing and Development, 1984Blood viscosity and the deformability and other properties of erythrocytes were compared among 60-, 150-, 320- and 710-day-old rats. Blood viscosity was remarkably higher in the 320- and 710-day old rats than in those 60- and 150 days' old. Measurement by the capillary centrifugal method showed that the deformability of erythrocytes is significantly ...
H, Abe, M, Orita, S, Arichi
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Erythrocyte fragility in aging
Biochimica et Biophysica Acta (BBA) - Biomembranes, 1974Abstract Hemolysis experiments were run on normal human whole blood from young and old people. An equation was developed to fit the data and determine the mean erythrocyte fragility and breadth of the fragility distribution. Results indicate an increase in mean fragility and a broadening of the erythrocyte fragility distribution as a function of ...
M, Detraglia +3 more
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Erythrocyte Sedimentation Rate and Age
Archives of Ophthalmology, 1976One hundred sixty-nine adult patients admitted to McPherson Hospital for elective eye or ear, nose, and throat surgery had erythrocyte sedimentation rates (ESRs) performed by the Wintrobe method, in addition to the usual admission laboratory work. The patients were selected for study if they had no known disease or were not receiving any medication ...
G S, Hayes, I N, Stinson
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Surface carbohydrates of aged erythrocytes
Biochemical and Biophysical Research Communications, 1978Abstract Human erythrocytes, fractioned into populations of different density by ultracentrifugation in albumin gradients were examined to determine what changes in cell surface carbohydrates occur during their lifespan. In addition to changes occurring in N -acetylneuraminic acid ageing was accompanied by reduction in the N ...
A, Baxter, J G, Beeley
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Decreased deformability in aging erythrocytes
Biochimica et Biophysica Acta (BBA) - Biomembranes, 1982Deformability of bovine erythrocytes separated according to density (and age) was estimated by a modified Teitel's filterability test, the centrifugational test of Sirs, and viscosity measurements of cell suspensions. Both youngest and oldest erythrocytes were found to be less deformable than middle-aged cells, a result speaking against any chief role ...
G, Bartosz +2 more
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Aged erythrocytes exhibit decreased anion exchange
Mechanisms of Ageing and Development, 1987The rate of transport of [32P] phosphate into human and bovine erythrocytes and of a spin-label analogue of phosphate (Tempo-phosphate) into human erythrocytes was found to decrease with increasing erythrocyte age by 15-20% when comparing 20% most dense cells with 20% of lightest cells.
G, Bartosz +5 more
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Changes in Erythrocyte Enzyme Activities during Erythrocyte Aging in Alcoholism
Alcoholism: Clinical and Experimental Research, 1988Aldehyde dehydrogenase, glucose‐6‐phosphate dehydrogenase, and pyruvate kinase activities were determined in erythrocytes of various ages, separated by Percoll gradient centrifugation, in 13 alcoholic patients and eight control subjects. The total erythrocyte activities of all three enzymes were not affected by alcoholism, however, the youngest cells ...
E, Mezey, D L, Rhodes
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Role of peroxidation in erythrocyte aging
Mechanisms of Ageing and Development, 1982The role of membrane peroxidation in red cell aging was investigated by exposing rat erythrocytes to a peroxide-generating system of xanthine oxidase with hypoxanthine, and the resulting alterations were compared to those observed during in vivo aging.
S R, Pfeffer, N I, Swislocki
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d-Amino acids in aging erythrocytes
1998Mature human erythrocytes are highly differentiated cells which have lost the ability to biosynthesize proteins de novo. During cell aging in circulation, erythrocyte proteins undergo spontaneous postbiosynthetic modifications, regarded as "protein fatigue" damage, which include formation of isomerized and/or racemized aspartyl residues.
INGROSSO, Diego, PERNA, Alessandra
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