The serotonergic system has been hypothesized to contribute to the biological susceptibility to type 2 diabetes mellitus (T2DM) and body-mass index (BMI) categories. We investigate a possible association of 5-HTTLPR polymorphism (L and S alleles) in the promoter region of the serotonin transporter gene (SLC6A4) with the development of T2DM and/or higher BMI by analyzing a sample of 138 individuals diagnosed with T2DM and 172 unrelated controls from the Mexican general population. In the total sample genotypes were distributed according to Hardy- Weinberg equilibrium, and S allele frequency was 0.58. There was no statistical association between 5-HTTLPR polymorphism and the development of T2DM in this Mexican population sample (p = 0.12). Nevertheless, logistic regression analysis of the L allele and increased BMI disclosed an association, after adjusting for age, sex and T2DM (p = 0.02, OR 1.74, 95% CI: 1.079-2.808).

Fiberboards were manufactured using the pulp of two raw materials: sawdust and chips of a tropical wood, "tornillo" (Cedrelinga cateniformis Ducke). The pulp was obtained by means of the cold soda chemi-mechanical process with a yield of 78%. The average dimensions of the fiberboards were 0.40 m x 0.40 m by 5 mm in thickness using 1.5% colophony and 2% alum. The fibrous mantle (MAT) was subjected to 5 kg/cm² of room temperature pressing for 2 min, followed by a hot pressing in a diagram of 110 kg/cm², 40 kg/cm² and 80 kg/cm² for 4, 15 and 4 min, respectively. The density of fiberboards made from sawdust pulp was 958 kg/m³ and 967 kg/m³ for fiberboards made from pulp chips and the water absorption values were 69% and 60% for both kinds of fiberboards, respectively. The Modulus of Rupture (MOR) was 107 kg/cm² and 242 kg/cm², respectively. Statistically, the values of the fiberboard properties displayed a great variability and there were significant differences between both types.

Se elaboraron tableros de fibras utilizando pulpa de dos materias primas: aserrín y astillas de una madera tropical, "tornillo" (Cedrelinga cateniformis Ducke). La pulpa fue obtenida mediante el proceso químico-mecánico a la soda en frío con un rendimiento de 78%. Las dimensiones medias de estos tableros fueron de 0,40 m x 0,40 m por 5 mm de espesor, utilizando 1,5% de colofonia y 2% de sulfato de alúmina. El manto fibroso (MAT) fue sometido a 5 kg/ cm² de prensado en frío por 2 min, luego prensado en caliente en un esquema de 110 kg/cm², 40 kg/cm² y 80 kg/ cm² por 4, 15 y 4 min respectivamente. La densidad promedio fue de 958 kg/m³ para tableros confeccionados a partir de pulpa de aserrín y 967 kg/m³ para los de pulpa de astillas, ambos presentaron valores de absorción de agua de 69% y 60%. El módulo de ruptura (MOR) fue de 107 kg/cm² y 242 kg/cm² respectivamente; estadísticamente, los valores de las propiedades de los tableros de fibras presentan gran variabilidad y diferencias significativas entre ambos tipos.