The use of autologous umbilical cord blood is feasible in neonatal open heart surgery. Complete surgical repair of complex critical CHD can be applied successfully to neonates within the first hours of life.
Origin of the circumflex coronary artery (Cx) from the pulmonary arteries is an extremely rare anomaly. We describe a two-month-old female patient with anomalous origin of the Cx from the right pulmonary artery associated with coarctation of the aorta. Reimplantation of the anomalous Cx to the aorta and coarctation repair were performed. There were no postoperative complications, and the patient was discharged in satisfactory condition.
A 5-hour-old boy underwent arterial switch operation and totally anomalous pulmonary venous connection repair. Subsequently developed severe pulmonary venous stenosis was successfully treated with hybrid balloon angioplasty.
Steel corrosion processes that occur due to the effects of the biochemically treated water in coke quenching plenums have been studied. Model investigations into the processes of the corrosion failure of carbon St. 3 steel and alloyed 18Х1MF steel were carried out to study the behavior of the metal exposed to the action of the primary but treated water used for the coke quenching after the metal is heated to 373 K and 773 K. Different types of the corrosion that results from the contact of the carbon steel and alloy steel with the sodium hydroxide biochemically treated water of the coke-chemical production have been described. It was shown that the corrosion failure of the steels results from the formation of the films of hydrated iron oxides that appear in all the test media and these films show different behavior of adhesion to specimen surfaces. It was proved that the water treatment results in a certain decrease of the values of the mass and in-depth corrosion factors for St.3 and 12X1MF steels, however it fails to produce an essential effect when the steel is in constant touch with hot water.
The assumption that oxides (glycidol, glycidol acetate, glycidol formate) are the intermediate molecular products of the oxidation reaction of allyl alcohol and its esters in the medium of acetic acid has been grounded. To optimize the process of obtaining glycerin esters the kinetics of these oxides reaction with acetic and formic acids has been investigated. Glycidol formate was found to be the most stable compound and glycidol-the least stable one. The rate of oxides reaction with formic acid is by order higher than that with acetic acid. It is reasonable to use allyl formate as the starting material to achieve the maximum yields of glycerin esters.
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