[The evidence for higher blood pressures in children and adolescents of the rural interior of Galicia than in other locations in Spain]. / Evidencia de presiones arteriales más elevadas en niños y adolescentes del interior rural de Galicia que en otras localizaciones en España.

AIM: To analyze differences in blood pressure levels in children and adolescents in Galicia with those of peers living in other parts of Spain. DESIGN: Cross-sectional study done in a rural area in Galicia. PARTICIPANTS: 870 boys and girls 6 to 16 years old. They are compared with published data from the RICARDIN study, that includes 10,042 participants selected at the schools in nine centers of Spain (one was the center in Galicia). MEASUREMENTS: Standardized methodology and certification procedures were used in Galicia and Spain to measure weight, height, Quételet index, systolic (SBP) and fifth-phase diastolic blood pressure (DBP5) and sexual maturation. Data are presented by sex and age group (1 year) both in Galicia and Spain. RESULTS: From 11 years and above, girls in Galicia present higher SBP than in Spain. In boys, the difference appears later. Galicia shows higher DBP5 levels than Spain in every age-sex group. In relation to obesity, the differences are of a small magnitude in the Quételet index, again, higher values in Galicia. CONCLUSIONS: This is the first population-based study available that rules out the possibility that the observed differences, previously already suggested, could be attributed to methodological problems. The differences in blood pressure and obesity between Galicia and other areas of Spain, already previously suggested in adults, can be the reflection of differences present from childhood.

Cis/Trans Reactivity: Epoxy-Amine Systems.

The reactivities of cis and trans isomers of 1,2-diaminocyclohexane (1,2-DCH)/epoxy resin were studied separately. We found that the primary amine hydrogen disappears in both isomers at a similar rate when they react with an epoxy resin. However, the formation of tertiary amines differs considerably. The reactivity of the second amine hydrogen for the trans isomer is greater than that for the cis isomer, and this difference is observed as the reaction proceeds. The main reason for the slower disappearance of the cis secondary amine is steric hindrance and this fact is observed in the preexponential factors, glass transition temperatures (Tg), and ratio of rate constants of secondary to primary amine (R). The reaction was followed by Fourier transform infrared spectroscopy in the near-infrared range. The values of Tg were obtained by differential scanning calorimetry.