Intraerythrocytic organic phosphates of fetal and adult seaperch (Embiotoca lateralis): Their role in maternal-fetal oxygen transport

1981 ◽  
Vol 144 (2) ◽  
pp. 253-259 ◽  
Author(s):  
Rolf L. Ingermann ◽  
Robert C. Terwilliger
Keyword(s):  
Oxygen Transport ◽  
Organic Phosphates ◽  
Embiotoca Lateralis

THE SHIFT TO THE LEFT

PEDIATRICS ◽  
1971 ◽  
Vol 48 (6) ◽  
pp. 853-856 ◽  
Author(s):  
Frank A. Oski ◽  
Maria Delivoria-Papadopoulos
Keyword(s):  
Oxygen Transport ◽  
Normal Adult ◽  
Red Cell ◽  
Equilibrium Curve ◽  
Organic Phosphates ◽  
Clinical Interest ◽  
Red Cell Organic Phosphates

For many years it appeared that physiologists, and physiologists alone, puzzled over the causes and significance of alterations in the position of the oxygen-hemoglobin equilibrium curve. The reports by Benesch and Benesch1 and Chanutin and Curnish2 in 1967, concerning the role of red cell organic phosphates in determining the affinity of hemoglobin for oxygen, have served to rekindle curiosity in this problem of oxygen transport and produced a common focus of clinical interest for neonatologists, hematologists, biochemists, and the now nearly forgotten physiologists. The oxygen-hemoglobin equilibrium curve of normal adult blood is depicted as the center curve in Figure 1.

Role of erythrocyte organic phosphates in blood oxygen transport in anemic quail

1991 ◽  
Vol 260 (4) ◽  
pp. R798-R803
Author(s):  
M. Riera ◽  
J. F. Fuster ◽  
L. Palacios
Keyword(s):  
Blood Level ◽  
Oxygen Transport ◽  
Oxygen Affinity ◽  
Molar Ratio ◽  
Blood Oxygen ◽  
Compensatory Response ◽  
Organic Phosphates ◽  
Blood Oxygen Affinity ◽  
Additional Influence

The effects of two different degrees of experimentally induced anemia and the consequent high percentage of circulating immature erythrocytes on oxygen affinity (pH 7.5 and 41 degrees C), erythrocyte organic phosphates, and Hb fractions have been studied in quail. Blood reticulocytes reached percentages of 24 and 69-87% in the first and second experiments, respectively. Variations in the phosphate levels found during the anemic process were related to the amount of circulating reticulocytes. The erythrocyte [ATP] (brackets indicate concentration) and [ATP]/[Hb] molar ratio increased with the release of reticulocytes and returned to control levels as they matured. The erythrocyte [inositol pentakisphosphate (InsP5)] decreased significantly when circulating reticulocytes showed their highest values, whereas there was hardly any effect on the [InsP5]/[Hb] molar ratio, which changed only slightly. Hb-O2 affinity also exhibited no statistical changes associated with acute anemia. These latter findings indicate that InsP5, at physiological concentrations, is the primary modulator of quail Hb function; the observed rise in [ATP] has no additional influence on Hb-O2 affinity. It is suggested that InsP5 tends to maintain the blood oxygen affinity in both mature erythrocytes and reticulocytes. The main compensatory response at blood level is a rapid bulk reticulocyte release from medulla.

scholarly journals Temperature modulation of oxygen transport in a diving mammal (Balaenoptera acutorostrata)

1990 ◽  
Vol 271 (2) ◽  
pp. 509-513 ◽  
Author(s):  
O Brix ◽  
S G Condò ◽  
A Bardgard ◽  
B Tavazzi ◽  
B Giardina
Keyword(s):  
Carbon Dioxide ◽  
Functional Properties ◽  
Oxygen Transport ◽  
Temperature Modulation ◽  
Oxygen Binding ◽  
Balaenoptera Acutorostrata ◽  
Organic Phosphates

The functional properties of haemoglobin from the Lesser Rorqual whale (Balaenoptera acutorostrata) have been characterized as a function of the heterotropic effector concentrations and temperature. The results obtained suggest the existence of sophisticated modulation mechanisms based on the interplay of organic phosphates, carbon dioxide, lactate and temperature. These, together with the very small apparent heat of oxygenation (delta H) of oxygen binding, have been physiologically interpreted on the basis of the specific metabolic needs of this diving mammal.

Characterisation of production of organic rich topsoil from sludge

2000 ◽  
Vol 42 (9) ◽  
pp. 195-201 ◽  
Author(s):  
P. Andreasen ◽  
P. B. Mortensen ◽  
A. Stubsgaard ◽  
B. Langdahl
Keyword(s):  
Organic Matter ◽  
Oxygen Consumption ◽  
Oxygen Transport ◽  
Mineral Soil ◽  
Climatic Conditions ◽  
Growth Media ◽  
Soil Mixture ◽  
Water Suspension ◽  
Aerobic Process ◽  
Stable Product

The stabilisation of a sludge-mineral soil mixture and a method to evaluate the state of stabilisation were investigated. The organic matter and nitrogen content are reduced up to 50% during a stabilisation process of three months under Danish climatic conditions. The stabilisation was shown to be an aerobic process limited by oxygen transport within the mixture. The degree of stabilisation was evaluated by oxygen consumption in a water suspension and the results showed that a stable product was achieved when oxygen consumption was stable and in the level of natural occurring aerobic soils (0.1 mgO2/(g DS*hr). The study thereby demonstrates that a stability of a growth media can be controlled by the oxygen consumption method tested.

scholarly journals A Comparative Study of the Oxygen Transport Proteins of Dendrostomum pyroides

1972 ◽  
Vol 247 (18) ◽  
pp. 5959-5963
Author(s):  
Gerald L. Klippenstein ◽  
Dee A. Van Riper ◽  
Elizabeth A. Oosterom
Keyword(s):  
Comparative Study ◽  
Oxygen Transport ◽  
Transport Proteins
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