Content Of Microaggregates Research Articles

Microaggregate content and flow rates of packed red blood cells.

Platelet rich red cells (PRRC) and platelet poor red cells (PPRC) are both prepared in the course of red cell production. PRRC tend to have a higher hematocrit (82 +/- 7) than PPRC (77 +/- 5), (p less than .001). There are more microaggregates present in PRRC (2.48 +/- 1.41 gm) than in PPRC (1.46 +/- 0.61 gm), (p less than .001). The infusion rate for PRRC was 4.0 X 1.8 ml/minute, and this was significantly smaller than for PPRC which was 9.7 +/- 1.7 m/minute, (p less than .001). This compares to a rate for whole blood of 32.8 ml/minute. The difference in flow rate of the two types of red blood cells is in part due to a difference in viscosity, but more inportantly due to a difference in microaggregate content. Flow rate is normalized for both types of packed cells by the addition of 100 to 150 ml of saline, while infusion time is normalized by the addition of only 50 to 100 ml of saline to the packed cell units.

INFLUENCE OF MINIMIZING TILLAGE ON AGROPHYSICAL PROPERTIES OF SODDY-MESOPODZOL SOIL

There are studied the effect of minimizing tillage by agrophysical parameters of sod-medium podzolic same eroded soil in the Middle Ural conditions in 2017-2018. A comparative assessment of annual underwinter plowing to a deep of 18 cm with annual shallow loosening of the soil up to 8 cm was made on backgrounds with different levels of agrochemical parameters. The influence of the studied factors and their combinations on the density and soil structure in layers 0-10 and 10-20 cm was determined. It is established that annual plowing, providing a looser plow layer (1.32-1.44 g / cm3), inevitably leads to an increase in the content of microaggregates to 18.5%, which means that it reduces the soil structure and its resistance to erosion processes. There is a tendency to decrease the density of the soil for plowing with the deterioration of agrochemical indicators in the low layer of the plow horizon. There are the soil in a layer of 10-20 cm was over-compacted to 1.58-1.59 g/cm3 with a minimal tillage on high and medium backgrounds. The density of the soil in the 0-10 cm layer did not differ significantly from its density during plowing by the high agrochemical background, (1.32-1.33 g / cm3), and the uncultivated layer did not over-compact and had an excellent structural condition (the content of the cloddy-granular structure is 84.1%). There is an agronomically valuable structure of the topsoil was more plowing on the average background. Results of studying have show that the improvement of agrochemical indicators of sod-medium podzolic medium loam soil expands the possibilities of minimizing tillage in the conditions of the Middle Urals.