[Thermal resistance of yeasts in orange juice at different concentrations of soluble solids]. / Resistencia térmica de levaduras en jugo de naranja a diferentes concentraciones de sólidos solubles.

Thermal decimal reduction time (D) of Rhodotorula rubra (R. rubra) and Candida intermedia (C. intermedia) at 63, 64, 65, 66 and 67 degrees C was studied, at soluble solids concentrations of 12, 36 and 52 degrees Brix in orange juice. Experiments were conducted according to Stumbo method. D values for R. rubra were obtained in a range of 3.1 s for D 67 degrees C at 36 degrees Brix as a minimum to 209 s at 64 degrees C and 52 degrees Brix as a maximum. For C. intermedia, the minimum D value was 3.2 s at 64 degrees C and 12 degrees Brix and the maximum was 6 s at 64 degrees C and 52 degrees Brix. It can be noticed that as the concentration of soluble solids increases, the thermal resistance of the yeasts increases. R. rubra exhibits its highest thermal resistance at 52 degrees Brix for all temperatures. C. intermedia shows more osmotolerancy that R. rubra but it is more sensitive to heat at high sugar concentrations.

[Antineutrophil cytoplasmic antibodies (ANCA): study of their presence in diseases not associated with arteritis]. / Anticuerpos anticitoplasmáticos de neutrófilos (ANCA): un estudio sobre su presencia en patologías no asociadas con arteritis.

Our study describes the presence of antineutrophil cytoplasmic antibodies (ANCA) in a group of different pathologies comprising 101 patients. Rheumatoid arthritis, systemic lupus erithematosus, idiopatic neutropenia, acute post-streptoccocal glomerulonephritis, minimal change nephrotic syndrome, Downs syndrome, adult periodontitis, tumoral calcinosis, monoartheritis and lipodystrophy were investigated for ANCA, through indirect immunofluorescence and an indirect solid-phase immunoassay (ELISA). Our results show the pattern of distribution of ANCA in the diseases investigated, and allowed us to make the first description of ANCA in diseases such as Downs syndrome, acute post-streptococcal glomerulonephritis and adult periodontitis. The high percentage of reactivity for ANCA detected in adult periodontitis, raise important questions about the possibility of reporting inaccurate percentages of positivity for some diseases, due to the presence of a concurrent disease such as adult periodontitis.