Impactos y adaptación al cambio climático en el Puerto de Veracruz / Impacts and adaptation to climate change in Veracruz

En este ensayo se disertan los impactos económicos, sociales y culturales que puede sufrir el puerto de Veracruz en caso de que el nivel del mar incremente súbitamente en 5 metros su nivel. Nuestro objetivo es geografizar los grupos vulnerables que se encuentran dentro de la zona de peligro. Es de advertir que el tratamiento cuantitativo proviene de micro-datos, mientras que con el trabajo de campo realizado a nivel local se buscó darle una representación cualitativa a nuestro enfoque interdisciplinario.   This article outlines the economic, social and cultural impacts that may suffer the port of Veracruz in case the sea level suddenly increase 5 meters their level. Our goal is zoning and caracterization of vulnerable groups that are within the danger zone. The quantitative treatment was derived from micro-data, while the fieldwork locally sought to give a qualitative representation to our interdisciplinary approach

Polymorphic appetite effects on waist circumference depend on rs3749474 CLOCK gene variant

Chronobiological aspects controlled by CLOCK genes may influence obesity incidence. Although there are studies that show an association between the expression of these genes and energy intake, waist circumference or abdominal obesity phenotypes, interactions with appetite have been insufficiently investigated in relation to chrononutrition. The objective was to identify interactions between CLOCK genetic variants involved in appetite status. A total of 442 subjects (329 women, 113 men; aged 18 to 65 years) were recruited. Anthropometric, dietary and lifestyle data were collected by trained nutritionists. Participants were classified according to their appetite feelings with a Likert scale. Multiple linear regression models were used to examine associations of the type genotype x appetite status on adiposity-related variables. p values were corrected by the Bonferroni method. A significant influence was found concerning the effects of appetite on waist circumference with respect to rs3749474 CLOCK polymorphism (p < 0.001). An additive model analysis (adjusted by age, gender, exercise and energy intake) showed that risk allele carriers, increased the waist circumference around 14 cm (β = 14.1, CI = 6.3–22.0) by each increment in the level of appetite. The effects of appetite on waist circumference may be partly modulated by the rs3749474 CLOCK polymorphism

Complejos de paladio (II) con carbenos mesoiónicos (MICs) diversidad estructural y catálisis homogénea

Una nueva serie de mono- y bis-1,2,3-triazol-5-ilidenos de paladio(ii) conteniendo (MICs) han sido sintetizados, aislados y caracterizados. La introducción de paladio a sales de 1,2,3-triazolio mediante su reacción con Pd(OAc)₂ generó complejos bimetálicos del tipo [Pd(MIC)I₂]₂con puentes del tipo ( ₂-I₂)y también complejos monometálicos con estructuras generales [PdMIC₂I₂ como mezclas isoméricascis y trans. Adicionalmente, se realizó la síntesis selectiva de complejos tipo-PEPPSI [MIC(PdI₂)Py] mediante la reacción de las sales de triazolio con PdCl₂ y K₂CO₃ en piridina. Todos los compuestos han sido caracterizados mediante RMN de ¹H y ¹ᶾC, FT-IR y cristalografía de rayos-X de monocristal. Estudios catalíticos preliminares de los nuevos complejos en procesos de formación de enlaces C-C y C-N serán discutidos.A new series of mono- and bis-1,2,3-triazol-5-ylidene (MIC) palladium(ii) complexes have been synthesized, isolated and characterized. Palladation of N3-methylated phenoxy derived 1,2,3-triazolium salts withPd(OAc)₂,afforded ₂-I₂ bridged bimetallic [Pd(MIC)I₂]₂and monometallic biscarbene complexes PdMIC₂I₂as a mixture of cis- and trans isomers. Efficient synthesis of PEPPSI-type complexes [Py(PdI₂)MIC] was achieved by the treatment of the triazolium precursors with PdCl₂in pyridine. All the complexes have been fully characterized by ¹H and ¹ᶾC NMR, FT-IR and single crystal X-ray diffraction. Preliminary catalytic performances of the new complexes in C-C and C-N bond forming processes will be discussed

Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV

The polarizations of promptly produced χ_(c1) and χ_(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at √s=8  TeV. The χ_c states are reconstructed via their radiative decays χ_c → J/ψγ, with the photons being measured through conversions to e⁺e⁻, which allows the two states to be well resolved. The polarizations are measured in the helicity frame, through the analysis of the χ_(c2) to χ_(c1) yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ → μ⁺μ⁻ decay, in three bins of J/ψ transverse momentum. While no differences are seen between the two states in terms of azimuthal decay angle distributions, they are observed to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum