ZnO synthesis from Zn-C and alkaline spent batteries by alkaline leaching: properties and applications

6th EUCHEMS Chemistry Congress. Seville, Spain, 11th-19 th September 2016This report describes the leaching experiments to recover Zn from spent household Zn-C and alkaline batteries. Basic zinc carbonate Zn5(CO3)2(OH)6 nanoparticles have been successfully synthesized by the leaching of an ammoniacal ammonium carbonate solution of black mass. Zinc oxide (ZnO) were prepared by the thermal decomposition of basic zinc carbonate precursor. The synthesis of ZnO micro and nanostructures is carried out through the vapor solid growth process.Ministerio de Economía y Competitividad MINECO (Projects MAT 2012-31959 and CSD2009-00013) and MINECO/FEDER (MAT2015-65274-R; 2016-2019). This work has supported by the Envirobat España S.L.Peer reviewe

Dolor osteoarticular y depresión en adultos mayores atendidos en un hospital geriátrico de Lima-Perú

Objective: To determine the relationship between osteoarticular pain and depression in older adults treated in a geriatric hospital in Lima, Peru. Materials and methods: An observational and descriptive study. A sample of 74 older adults treated in the outpatient department of a geriatric hospital in Lima, Peru, in 2021 was selected. A survey was used as technique and a questionnaire as instrument. Using the IBM SPSS Statistics statistical software, a chi-square test was performed with a significance level of 5 %. Results: Concerning the older adults’ general characteristics, 51.35 % were over 70 years of age, 55.41 % were women, 60.81 % had secondary education and 86.49 % were married or cohabiting. Regarding the characteristics of pain, 32.43 % stated that the pain decreased when they were not alone, 20.27 % pointed out that the pain was more intense at home, 81.08 % had moderate pain and 64.86 % had experienced pain for more than six months. As for depression, 43.24 % dealt with mild depression and 29.73 % had persistent depression. The characteristics of osteoarticular pain associated with depression were the degree of pain (p = 0.041) and duration of pain (p = 0.024). Conclusions: Osteoarticular pain was significantly associated with depression in older adults treated in a geriatric hospital in Lima, Peru.Objetivo: Determinar la relación existente entre el dolor osteoarticular y la depresión en adultos mayores atendidos en un hospital geriátrico de Lima-Perú.Materiales y métodos: Estudio de diseño observacional y descriptivo. Se seleccionó una muestra de 74 adultos mayores que fueron atendidos en consulta externa de un hospital geriátrico de Lima-Perú, en el 2021. Se utilizó como técnica la encuesta y como instrumento, el cuestionario. Mediante el paquete estadístico SPSS se realizó la prueba de chi cuadrado, con un nivel de significancia del 5 %. Resultados: Acerca de las características generales, el 51,35 % de los adultos mayores fueron mayores de 70 años, el 55,41 % fueron mujeres, el 60,81 % tuvo instrucción secundaria y el 86,49 % eran casados o convivientes. Respecto a las características del dolor, el 32,43 % manifestó que el dolor disminuía cuando estaba acompañado, el 20,27 % señaló que el dolor es más intenso en casa, el 81,08 % tuvo un dolor moderado y el 64,86 % experimentó dolor mayor a 6 meses. La frecuencia de la depresión en su mayoría fue leve, con el 43,24 %, seguido de la depresión establecida, con el 29,73 %. Las características del dolor osteoarticular asociados a la depresión fue el grado del dolor (p = 0,041) y el tiempo de dolor (p = 0,024). Conclusiones: El dolor osteoarticular se asocia de manera significativa con la depresión en adultos mayores atendidos en un hospital geriátrico de Lima-Perú

Deep Learning for Action and Gesture Recognition in Image Sequences: A Survey

Interest in automatic action and gesture recognition has grown considerably in the last few years. This is due in part to the large number of application domains for this type of technology. As in many other computer vision areas, deep learning based methods have quickly become a reference methodology for obtaining state-of-the-art performance in both tasks. This chapter is a survey of current deep learning based methodologies for action and gesture recognition in sequences of images. The survey reviews both fundamental and cutting edge methodologies reported in the last few years. We introduce a taxonomy that summarizes important aspects of deep learning for approaching both tasks. Details of the proposed architectures, fusion strategies, main datasets, and competitions are reviewed. Also, we summarize and discuss the main works proposed so far with particular interest on how they treat the temporal dimension of data, their highlighting features, and opportunities and challenges for future research. To the best of our knowledge this is the first survey in the topic. We foresee this survey will become a reference in this ever dynamic field of research

Proptosis, una búsqueda cada vez más rápida y certera

This is a case report corresponding to a young woman with neurological symptoms (headache and diplopia), a structural lesion of the orbit and lesions on chest radiography, where a broad differential diagnosis arises and where the challenge is to quickly locate the most accessible primary lesion that allows more thorough characterization clinical case and enables more accurate treatment.Se trata de un caso clínico correspondiente a una mujer joven con clínica neurológica (cefalea y diplopia), una lesión estructural de la órbita, junto con una radiografía de tórax patológica, donde se plantea un amplio diagnóstico diferencial y donde el reto consiste en la rápida localización de la lesión primaria más accesible que permita la tipificación más exhaustiva y posibilite el tratamiento más certero

Genetic Diversity and Population Genetics of Mosquitoes (Diptera: Culicidae: Culex

The population genetics and phylogenetic relationships of Culex mosquitoes inhabiting the Sonoran Desert region of North America were studied using mitochondrial DNA and microsatellite molecular markers. Phylogenetic analyses of mitochondrial cytochrome c oxidase subunit I (COI) from mosquitoes collected over a wide geographic area, including the Baja California peninsula, and mainland localities in southern Arizona, USA and Sonora, Mexico, showed several well-supported partitions corresponding to Cx. quinquefasciatus, Cx. tarsalis, and two unidentified species, Culex sp. 1 and sp. 2. Culex quinquefasciatus was found at all localities and was the most abundant species collected. Culex tarsalis was collected only at Tucson, Arizona and Guaymas, Sonora. The two unidentified species of Culex were most abundant at Navojoa in southern Sonora. Haplotype and nucleotide diversities in the COI gene segment were substantially lower in Cx. quinquefasciatus compared with the other three species. Analysis of molecular variance revealed little structure among seven populations of Cx. quinquefasciatus, whereas significant structure was found between the two populations of Cx. tarsalis. Evidence for an historical population expansion beginning in the Pleistocene was found for Cx. tarsalis. Possible explanations for the large differences in genetic diversity between Cx. quinquefasciatus and the other species of Culex are presented

Covalently Cross-Linked Nanoparticles Based on Ferulated Arabinoxylans Recovered from a Distiller’s Dried Grains Byproduct

The purpose of this investigation was to extract ferulated arabinoxylans (AX) from dried distillers’ grains with solubles (DDGS) plus to investigate their capability to form covalently cross-linked nanoparticles. AX registered 7.3 µg of ferulic acid/mg polysaccharide and molecular weight and intrinsic viscosity of 661 kDa and 149 mL/g, correspondingly. Fourier transform infrared spectroscopy (FTIR) was used to confirm the identity of this polysaccharide. AX formed laccase induced covalent gels at 1% (w/v), which registered an elastic modulus of 224 Pa and a content of FA dimers of 1.5 µg/mg polysaccharide. Scanning electron microscopy pictures of AX gels exhibited a microstructure resembling a rough honeycomb. AX formed covalently cross-linked nanoparticles (NAX) by coaxial electrospray. The average hydrodynamic diameter of NAX determined by dynamic light scattering was 328 nm. NAX presented a spherical and regular shape by transmission electron microscopy analysis. NAX may be an attractive material for pharmaceutical and biomedical applications and an option in sustainable DDGS use

Enantiopure 4‐oxazolin‐2‐ones and 4‐methylene‐2‐oxazolidinones as chiral building blocks in a divergent asymmetric synthesis of heterocycles

En este trabajo se describe la reactividad de las oxazolidin-2-onas en un ambiente quiral obteniéndose resultados novedosos, los cuales se describen extensamente.Enantiopure 3‐((R)‐ and 3‐((S)‐1‐phenylethyl)‐4‐oxazoline‐2‐ones were evaluated as chiral building blocks for the divergent construction of heterocycles with stereogenic quaternary centers. The N‐(R)‐ or N‐(S)‐1‐phenylethyl group of these compounds proved to be an efficient chiral auxiliary for the asymmetric induction of the 4‐ and 5‐positions of the 4‐oxazolin‐2‐one ring through thermal and MW‐promoted nucleophilic conjugated addition to Michael acceptors and alkyl halides. The resulting adducts were transformed via a cascade process into fused six‐membered carbo‐ and heterocycles. The structure of the reaction products depended on the electrophiles and reaction conditions used. Alternative isomeric 4‐methylene‐2‐oxazolidinones served as chiral precursors for a versatile and divergent approach to highly substituted cyclic carbamates. DFT quantum calculations showed that the formation of bicyclic pyranyl compounds was generated by a diastereoselective concerted hetero‐Diels‐Alder cycloaddition.Instituto Politécnico Nacional, Secretaria de Investigación y Estudios Avanzados de la Universidad Autónoma del Estado de México, Universidad de Guanajuato y CONACYT

Pasados releídos: el Dolmen del Portillo de las Cortes. Guadalajara / MAN

La oportunidad de retomar el estudio del dolmen del Portillo de las Cortes, Guadalajara, a partir de los materiales conservados en el MAN y de recientes trabajos de campo, ofrece un resultado positivo. Podemos aportar el conocimiento de fuentes de aprovisionamiento, una fecha C14 obtenida de un cráneo recientemente documentado en la reestructuración del MAN, y una nueva lectura de posibles refacturas del monumento

Escritura creativa y digital en las aulas a partir de cuentos tradicionales

El objetivo final de este proyecto del grupo ELLI es múltiple; por un lado, la creación de una web especializada en los cuentos tradicionales y en la escritura creativa, y por otro, un proyecto didáctico que empieza en las aulas de la Facultad de Educación, con metodología de Aprendizaje Basado en Proyectos (ABP o PBL, Project-based learning)