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Biomedical subjects

L I Irzhak

Publications and source records attributed to L I Irzhak.

At least 19 recordsLinked to original sources
PubMed2000

[Mechanical human heart work in a newborn infant].

The echo- and dopplerography of newborn infants up to 10-day age revealed that their heart work capacity was about 6 Wt, relative capacity--25 Wt/100 g of ventricular mass. These data correspond to those of adult humans. The Frank-Starling mechanism was corroborated.

Blood Flow Velocity↗
PubMed1993

[The action of blood plasma and cerebrospinal fluid on the functional properties of human hemoglobin].

The blood plasma increases the O2 affinity and acid-base capacity of haemoglobin. The coefficient lg p50/pH is 2-5 times higher than Bohr coefficient. The effect remains unchanged after boiling of plasma, increases after dilution of haemoglobin and decreases after boiling of plasma with ethanol. The cerebrospinal fluid also increases the O2-affinity of haemoglobin. Probable mechanisms of the phenomenon are discussed.

Adult↗
PubMed1993

[The autodeoxygenation of hemoglobin].

The incubation of hemoglobin solutions without air contacts at room temperature with addition of antibiotics is accompanied by decrease of oxy form and accumulation of desoxy form. The content of methemoglobin changes at a less degree. The increase of the temperature accelerates the process, the acidification of solutions decelerates it.

Air↗
PubMed1987

[Action of hexenal and ethyl alcohol on hemoglobin and carboanhydrase].

The change of hemoglobin and carbonic anhydrase properties under the action of hexenal and ethyl alcohol has been studied in rabbits and ewes. It has been shown that hexenal causes the decrease of blood ph and p50 of hemoglobin, ethanol causes the increase of blood ph and p50. That contradicts the requirements of the alkaline Bohr effect. Hexenal decreases the activity of carbonic anhydrase.

Animals↗
PubMed1985

[Effect of sodium chloride on the properties of hemoglobin in the erythrocyte].

The effect of iso- and hypertonic concentrations of sodium chloride (NaCl) on hemoglobin functional properties and acid-base balance in hemolysate, was studied. Washing of erythrocytes with 0.85% solution of NaCl decreased the pH and hemoglobin affinity to oxygen to such an extent that the Bohr effect increased as the result of effect of chloride ions on hemoglobin properties added to the effects of pH.

Acid-Base Equilibrium↗
PubMed1984

[Not Available].

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History, Modern 1601-↗
PubMed1983

[Not Available].

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History, Modern 1601-↗
PubMed1978

Multinucleated erythroid cells in blood of golden hamster embryos.

Blood smears of 11 and 13-day-old embryos (20) and newborns (10) of golden hamsters were analysed. The smears were stained with brilliant cresyl blue in a moist chamber for 5--7 min. About 2--6 thousand cells were counted in 200 visual fields. By means of an ocular micrometer MOB-1 the diameters of 300 cells were measured and the curves on cell distribution were plotted according to the diameters. It was found that the blood of 11-day-old golden hamster embryos contained about 8% of binuclear and sixnuclear megaloblasts, and that of 13-day-old embryos--about 2.5% of binuclear and sixnuclear erythroblasts and megablasts of the second generation. In the bloood of newborn hamster polynuclear cells are absent.

Animals↗