Rotational state-changing collisions between N2+_2^+ and Rb at low energies

We present a theoretical study of rotationally elastic and inelastic collisions between molecular nitrogen ions and Rb atoms in the sub-Kelvin temperature regime prevalent in ion-atom hybrid trapping experiments. The cross sections for rotational excitation and de-excitation collisions were calculated using quantum-scattering methods on ab-initio potential energy surfaces for the energetically lowest singlet electronic channel of the system. We find that the rotationally inelastic collision rates are at least an order of magnitude smaller than the charge-exchange rates found in this system, rendering inelastic processes a minor channel under the conditions of typical hybrid trapping experiments.Comment: 6 pages, 5 figures, Computational study of rotational state changing collision

Evaluación de la respuesta histológica tumoral luego de quimioterapia neoadyuvante en adenocarcinoma gástrico avanzado

The objective of the present study was to evaluate the tumor response after neoadjuvant chemotherapy (NAC) in patients diagnosed with advanced gastric adenocarcinoma. A cross-sectional observational analytical study was conducted based on data recorded in the clinical records of patients diagnosed with advanced gastric adenocarcinoma treated with NAC at the Regional Institute of Neoplastic Diseases - Northern IREN during the period from January 2012 to January 2017 To establish the relationship between the associated factors (Age, sex, histological type, primary tumor location, Bormann’s type, degree of cell differentiation, family history and tumor size evaluated by tomography prior to chemotherapy) and the response or not to the Neoadjuvant chemotherapy, bivariate analysis was used. It was found that the tumor size was the only variable statistically related to tumor regression after QNA (OR = 28, p = 0,010) although its 95% CI ranged between 0,92-851,6. It is concluded that there is an association between the tumor size prior to NAC and the tumor response in patients with advanced gastric adenocarcinoma.El objetivo del presente estudio fue evaluar la respuesta histológica tumoral luego de quimioterapia neoadyuvante (QNA) en adenocarcinoma gástrico avanzado. Se realizó un estudio analítico observacional de corte transversal en base a datos registrados en las historias clínicas de pacientes con diagnóstico de adenocarcinoma gástrico avanzado tratados con QNA en el Instituto Regional de Enfermedades Neoplásicas – IREN Norte durante el periodo de enero 2012 a enero del 2017. Se empleó el análisis bivariado. Para establecer la relación entre los factores asociados (Edad, sexo, tipo histológico, localización primaria del tumor, tipo de Borrmann, grado de diferenciación celular, antecedentes familiares y tamaño tumoral evaluado por tomografía previa a quimioterapia) y la respuesta o no a la quimioterapia neoadyuvante. Se encontró que el tamaño tumoral pretratamiento fue la única variable estadísticamente relacionada con la regresión tumoral luego de QNA (OR=28; p=0,010), aunque su IC 95% osciló entre 0,92-851,6. Se concluye que existe asociación entre el tamaño tumoral previo a QNA y la respuesta tumoral en pacientes con adenocarcinoma gástrico avanzado

TOX3 rs3803662 Polymorphism Is Associated With Breast Cancer Protection In Northeastern Mexican Woman

Introduction: Low penetrance genes are involved in breast cancer (BC) and confer risk for the development of this neoplasia. Different single nucleotide polymorphisms (SNPs) associated with BC have been identified, such as rs3803662 (TOX3), which is related to estrogen receptors in European and African-American women. The contribution of this variant in the Mexican population is unknown. The objective of this study was to evaluate, through a case-control design, the association of the SNP rs3803662 (TOX3), with the risk of BC in women from northeastern Mexico. Methods: We included 434 cases and 228 controls. Genotyping was carried out using RFLPs. The SPSS 7.0 statistical program was used to determine the gene frequencies, the estimation of the relative risk (Odds ratio [OR]), and the Hardy-Weinberg equilibrium (EHW). Results: The homocygote (T/T) genotype of the SNP TOX3 rs3803662 was identified as a protective allele for BC (OR: 0.47, 95% CI: 0.29 - 0.78). Conclusions; The T allele of the SNP rs3803662 can be considered as a protective factor for BC from northeastern Mexico women

Cold-water corals research in the lab and in the field: (1) growth rates of four CWC species maintained in aquaria, (2) new research areas: the Galicia Bank and the Avilés canyon (Atlantic and Cantabrian Sea), a scientific and methodological approach

Growth rates of 4 Cold-water Coral (CWC) species (Madrepora occulata, Lophe/ia pertusa, Desmophyllum cristagalli and Dendrophyllia cornigera) from the Mediterranean Sea have been measured under the same and controlled laboratory conditions over a nine months period. Results showed that M. occulata grew faster than the other three species, which presented similar growth rates. These results are discussed and also compared with the growth of tropical coral species maintained in aquaria, but in different light and temperature conditions, which corresponded to the usual culture conditions of these corals. It appeared that the zooxanthellate tropical coral Galaxea fascicularis exhibited similar growth rates than the CWC M. oculata. Further we present new research areas on the Atlantic and Cantabrian continental margin, the Galicia Bank and the Aviles canyon, which are part of the zones studied in the Spanish LIFE project INDEMARES, as well as possible targets as Marine Protected Areas (MPAs) for the NATURA 2000 network. Both areas are studied considering an ecosystem approach, aboarding an integrated study of the physical scenario (hydrography, geomorphology), all ecosystem compartments (fish, endo-, epi-, and suprabenthic and benthopelagic fauna) and the trophic relationships between them. All this information, together with the study of the impact of the fisheries working in the areas, will be integrated in a trophodynamic mass-balance model and will be used to identify vulnerable ecosystems (VE) (as the CWC habitats are) and essential fish habitats (EFH). This methodological approach offers a holistic view of these deep-sea ecosystems and can be used to design more effective and successful management strategies for MPA

Emigración, tránsito y retorno en México

Las condiciones políticas, económicas y sociales no solo han potencializado sino que además han modificado los flujos migratorios en el mundo. Pobreza, desempleo, violencia, persecución y reunificación familiar son fenómenos que obligan a las personas a movilizarse desde o hacia su país de origen. México es fiel reflejo de ello. El país vive la migración en todas sus formas: salida, llegada, tránsito, retorno. La ONU estima que más de 450 mil personas cruzan al año el territorio nacional hacia lo que esperan sea un destino mejor. Es un viaje largo, difícil, lleno de peligros, con repercusiones tanto físicas como mentales. Este libro aborda la compleja realidad migratoria del país desde cuatro ángulos: el trabajo de la Compañía de Jesús para apoyar a las familias migrantes; la migración de tránsito, con un aterrizaje en el caso de los adolescentes que viajan solos; la creciente migración de retorno y su encuentro con una realidad social ajena; y el aspecto psicológico del fenómeno migratorio, de quienes se van y los que se quedan. En conjunto, esta obra aporta elementos relevantes para que académicos, servidores públicos y sociedad civil entiendan mejor las distintas vertientes adoptadas por el fenómeno migratorio, así como el esfuerzo que se realiza desde la academia y por parte de la Compañía de Jesús para mejorar las condiciones de vida de sus protagonistas