770 resultados para heterothermy index


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Se presenta un índice nomenclatural  de los artículos publicados en la Sección de Nomenclatura Fitosociológica desde 1989 hasta 1997. Se adjunta una relación completa de los sintaxones citados en la misma, con la referencia de la página de la revista en que se han tratado; la relación incluye autoría de los nombres, situación nomenclatural, artículos del CPN aplicados e indicación de las referencias bibliográficas de la diagnosis original o de las informaciones sobre tipoficación aportadas.

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Se da a conocer la relación completa de los nuevos nombres de táxones fúngicos propuestos por L.M. Unamuno (1879-1943). En total se citan 267 táxones, que incluyen un género, 225 especies (9 de ellas con nombres inválidos), 22 variedades y 19 formas (2 de ellas con nombre inválido o ilegitimo). Para cada taxon se refieren la diagnosis original, la fecha de distribución de la misma y su indicación locotípica. Además, se incluye una lista completa de las publicaciones de Unamuno.

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Reduced arterial compliance precedes changes in blood pressure, which may be mediated through alterations in vessel wall matrix composition. We investigated the effect of the collagen type I-1 gene (COL1A1) +2046G>T polymorphism on arterial compliance in healthy individuals. We recruited 489 subjects (251 men and 238 women; mean age, 22.6±1.6 years). COL1A1 genotypes were determined using polymerase chain reaction and digestion by restriction enzyme Bal1. Arterial pulse wave velocities were measured in 3 segments, aortoiliac (PWVA), aortoradial (PWVB), and aorto-dorsalis-pedis (PWVF), as an index of compliance using a noninvasive optical method. Data were available for 455 subjects. The sample was in Hardy-Weinberg equilibrium with genotype distributions and allele frequencies that were not significantly different from those reported previously. The T allele frequency was 0.22 (95% confidence interval, 0.19 to 0.24). Two hundred eighty-three (62.2%) subjects were genotype GG, 148 (35.5%) subjects were genotype GT, and 24 (5.3%) subjects were genotype TT. A comparison of GG homozygotes with GT and TT individuals demonstrated a statistically significant association with arterial compliance: PWVF 4.92±0.03 versus 5.06±0.05 m/s (ANOVA, P=0.009), PWVB 4.20±0.03 versus 4.32±0.04 m/s (ANOVA, P=0.036), and PWVA 3.07±0.03 versus 3.15±0.03 m/s (ANOVA, P=0.045). The effects of genotype were independent of age, gender, smoking, mean arterial pressure, body mass index, family history of hypertension, and activity scores. We report an association between the COL1A1 gene polymorphism and arterial compliance. Alterations in arterial collagen type 1A deposition may play a role in the regulation of arterial compliance