[Ferricyanide method of testing hemoglobin preparations]. / Ferritsianidnyi sposob testirovaniia preparatov gemoglobina.

It has been shown that low concentrations of potassium chloride change almost similarly the rate constant of oxyhemoglobin autooxidation in tris-buffer and the rate constant of its oxidation by ferricyanide in the same buffer. A conclusion has been made on the principal possibility of using the latter constant as a test for oxyhemoglobin state in solution and, particularly, for its predisposition to autooxidation.

[The coagulation characteristics of human oxyhemoglobin in the presence of a mercury (II) ion in a neutral phosphate buffer]. / Osobennosti koaguliatsii oksigemoglobina cheloveka v prisutstvii iona rtuti (II) v neitral'nom fosfatnom bufere.

The kinetics of human oxyhemoglobin coagulation in neutral phosphate buffer in the presence of mercury acetate at 20 degrees has been studied using turbidimetric methods. The addition of small amounts of concentrated Hg2+ solution leads to rapid local protein coagulation with subsequent dissolution of the formed coagulate. Coagulation can be inhibited by addition of Tris that binds to mercury ions. The pattern of oxyhemoglobin coagulation is determined by molar Hg2+/protein ration rather than by total Hg2+ concentration.

[Antibiotic sensitivity of various Staphylococcus species isolated from newborn infants with purulent septic infections]. / Izuchenie chuvstvitel'nosti k antibiotikam stafilokokkov razlichnoi vidovoi prinadlezhnosti, vydelennykh ot novorozhdennykh s gnoino-septicheskoi infektsiei.

Sensitivity of 120 staphylococcal strains belonging to different species isolated from newborn infants with pyoseptic infections was studied with respect to 13 antibiotics. Methicillin, cephaloridin, rifampicin, ristomycin, gentamicin and novobiocin were mainly highly active against the isolates, while some of the strains were resistant. The coagulase negative species were as a whole characterized by higher resistance levels with respect to some antibiotics, as compared to Staph. aureus. The predominant part of the coagulase negative strains with exceedingly high resistance levels did not belong to Staph. epidermidis. The sensitivity of staphylococci depended on the source of their isolation. At large the strains isolated from purulent excretions of localized foci were characterized by lower levels of resistance to a number of antibiotics (benzylpenicillin, tetracycline, erythromycin, methicillin and others) as compared to the strains isolated from the blood.