El tratamiento de las denominadas Uniones de Empresa en el Anteproyecto de Ley de Código Mercantil

El presente trabajo analiza la regulación dada por el Anteproyecto a los instrumentos jurídicos de formalización del control – grupos por subordinación – y de la coordinación empresarial – grupos por coordinación, agrupaciones de interés económico y uniones temporales de empresa. Analiza las novedades regulatorias en el ámbito de los grupos por subordinación y critica la pretensión de homogeneizar en una única categoría de “Uniones de Empresas” ambos tipos de instrumentos organizativa y funcionalmente diversos, la pretensión de construir el régimen de los grupos por coordinación sobre la horma de los grupos por subordinación, la deriva de las UTEs al régimen de las sociedades colectivas y la preservación de la esquizofrenia regulatoria asociación – sociedad y del régimen supletorio de las sociedades colectivas para las Agrupaciones de Interés Económico

A Tetraferrocenyl-Resorcinarene Cavitand as a Redox-Switchable Host of Ammonium Salts

Tetraannulation of a resorcinarene-octaamino cavitand with ferrocenecarboxaldehyde allows the preparation of a tetrabenzimidazole-resorcinarene cavitand with four ferrocenyl moieties directly linked to the C2 atom of the imidazole units. Oxidation of the four ferrocenyl moieties produces important structural modifications of the molecule, as indicated by DFT calculations performed for the neutral and tetraoxidized forms of the cavitand. By means of 1H NMR spectroscopic analysis, the encapsulating properties of the new tetraferrocenyl-resorcinarene cavitand toward a series of ammonium salts were evaluated, and a clear cutoff point in binding affinity with respect to size was observed. Cyclic voltammetric studies allowed us to estimate the relative association constants for the neutral and oxidized forms of the cavitand, thus indicating that the guest was bound to the neutral (reduced) state of the cavitand and was released from the oxidized form. These redox-addressable conformational and binding properties of the resorcinarene-tetraferrocenyl cavitand constitute all the necessary features of a redox-switchable molecular gripper. By means of mass-spectrometric analysis, we could unambiguously confirm the molar stoichiometry of the host–guest complex (1:1) and assess the strong guest encapsulation, as indicated by triggering the covalent coupling between host and guest in the gas phase.MEC of Spain (CTQ2011-24055/BQU and CTQ2014-54071-P) and the Universitat Jaume I (P11B2014-02

Hook effect in radioligand assay for Anti Glutamic Acid Decarboxylase (Anti-GAD65). Influence of temperature and physicochemical interpretation

Background: Radioligand assay is one of the principal methods used for analytical determination of the Anti-GAD65 concentration. We studied the influence of temperature on the calibration curves obtained by such a method Matherial and Methods: We used a commercially available RIA kit for Anti-GAD65 and a gamma counter. Data was analyzed using Statistica software. Results and Discusion: Activities bound to the antibody increase with temperature. There was a decrease in activity for high concentrations attributable to the "hook effect". We propose a simple physicochemical model that justifies satisfactorily the results.Objetivo: El análisis por radioligando es uno de los métodos principales utilizados en la determinación analítica del Anti-GAD65. Se ha estudiado la influencia de la temperatura sobre las gráficas de calibración obtenidas por dicha técnica. Material y Métodos: Usamos un kit comercial para Anti-GAD65 y un contador gamma. Los resultados son analizados mediante el programa Statistica. Resultados y Discusión: Las actividades ligadas al anticuerpo aumentan con la temperatura. Se observa una disminución de la actividad para altas concentraciones atribuible al llamado “efecto anzuelo”. Se propone un sencillo modelo fisicoquímico que justifica satisfactoriamente los resultado

Implantación de las buenas prácticas de laboratorio en la asignatura "Química para las Ingenierias" en la Universitat Jaume I

Comunicación presentada en la V Jornada Nacional sobre Estudios Universitarios, celebrades en la Universitat Jaume I (Castellón, España), los dies 12 y 13 de Noviembre de 2015.En el presente artículo, se detalla la implementación de las Buenas Prácticas de Laboratorio (BPL) en el laboratorio de la asignatura «Química para las Ingenierías» (EX1006), impartida en varios grados de ingeniería (Agroalimentaria y del Medio Ambiente, Mecánica, Eléctrica, Tecnologías Industriales y Química) de la Universitat Jaume I. Las BLP son un conjunto de normas y procedimientos operativos acerca de la forma adecuada de organizar y trabajar en el laboratorio en una amplia variedad de disciplinas científicas, incluida la química. El principal objetivo de las BPL es asegurar la fiabilidad, estabilidad y calidad de los resultados. Para ello, se indica cómo el procedimiento experimental debe ser planificado, ejecutado, supervisado, anotado, registrado y archivado. Asimismo, proporciona recomendaciones para la gestión del laboratorio, en especial para minimizar el vertido de residuos tóxicos, e incrementar la seguridad laboral en el laboratorio. Varias organizaciones y agencias internacionales (industria farmacéutica, la Organización para la Cooperación y el Desarrollo Económicos, US Food and Drug Administration y la Comisión Europea), han desarrollado y promulgado varios conjuntos de normas BLP. La Universitat Jaume I considera que un conocimiento profundo y una aplicación adecuada de las BPL son muy importantes para desarrollar un trabajo correcto en el laboratorio químico. Por ello, los estudiantes de química deben ser conscientes desde el primer curso académico de su relevancia, así como conocer las normas principales y la forma de aplicarlas en el laboratorio. Por ello, las BPL se han incluido en la guía docente de la asignatura de Laboratorio de Química para las Ingenierías (1er curso académico) Además, los profesores deben centrarse en las BLP al impartir la docencia, para un correcto aprendizaje por parte de los estudiantes. Se requirió a los estudiantes que evaluasen el proceso de implantación y mostrasen su grado de aceptación de las BPL, mediante un cuestionario global de la asignatura. Como resultado final, se puede remarcar que los estudiantes comprendieron la utilidad de las BPL y la importancia de conocerlas para su futuro laboral, así como la necesidad de su inclusión en la guía docente de las asignatura de laboratorios de química

Management of diversity in master classroom: an increasing challenge for science education in valencian universities

Comunicació presentada a INTED2018, 12th International Technology, Education and Development Conference. (March 5-7, 2018, Valencia, Spain).Currently, many foreign students study a Master degree at the Valencian Universities. We can find students, which have immigrated to Spain in the recent years, and then have partially or fully follow the Spanish curricula (High School and/or Grade), and others which have come specifically to study the Master, attracted by the reputation of the Universities and the job and way-of-life offered by the country, and then have achieved their Grade in their countries. This has increased the diversity of the students in the classrooms, related to the ethnic origin, mother language, study practices, background and integration in the society. The present work gives an overview on how students and teacher manage the heterogeneity and diversity in a Master classroom related to chemistry. The term “diversity” is first detailed prior to discussing explicit studies. Different aspects of diversity are stated. The personal experience of the foreign students to adapt to the Spanish courses and environment was investigated. The actions taken by the lecturer to take advantage of diversity and minimize its negative effects were examined. A comparison between the academic results obtained by international and national students is given. Finally, the attention will be focused on language, study practices and background, since these dimensions are frequently discussed in the Valencian context. The implications and opportunities that offer diversity for national but also for international science research are presented

Design of the laboratory script by the students in chemistry practicals: Analysis of water

Comunicació presentada a INTED2018, 12th International Technology, Education and Development Conference. (March 5-7, 2018, Valencia, Spain).The laboratory practices during the Degree in Chemistry are currently designed so that the student must learn and execute a fully developed experimental protocol, previously written up by the professor, which contains all the information and requirements for the correct development of each laboratory session. Under these conditions, students do not need to take any initiative and, consequently, they do not put enough effort in reaching practical abilities with a well-based scientific criterion and do not try to think over the purpose of each lab operation, as well as the reason to use each material and/or each reagent. Thus, with the aim to promote a more active role of the students in their learning process and to improve their autonomy, a new laboratory practices design has been developed in this work, which follows methodologies on project-based cooperative learning: the students have been requested to elaborate themselves the laboratory script by pairs. With this innovative design, we pursue to involve the students in both elaboration and execution steps of the laboratory practicals, and then to increase their attention on them. Besides, the required bibliographic research would improve their knowledge about the studied topic and all aspects about the work at the laboratory. The practicals to-be-developed were related to the study of the physico-chemical quality of natural water, which has a high social relevance

Redox-Switchable Cycloisomerization of Alkynoic Acids with Napthalenediimide-Derived N-Heterocyclic Carbene Complexes

Two naphthalene-diimide (NDI) bis-imidazolium salts have been used as N-heterocyclic carbene (NHC) precursors for the preparation of NDI-functionalized complexes of rhodium and iridium of general formula [MCl(NDI-NHC)(COD)] (M=Rh, Ir; NDI-NHC=NDI-functionalized NHC ligand). Comparison of the IR spectra of the complexes [IrCl(NDI-NHC)(CO)2] and their related one- and two-electron reduced forms, reveal that each one-electron reduction produces a decrease of the average ν(CO) of 9–10 cm−1, indicating a significant enhancement of the electron-richness of the metal. The [MCl(NDI-NHC)(COD)] complexes were tested in the catalytic cycloisomerization of alkynoic acids. The one-electron reduced forms showed greatly enhanced activities. For the cyclization of 5-hexynoic acid, the two-electron reduction of the ligand produced further enhancement of the catalytic activity, therefore showing that the catalyst can switch between three redox species with three distinct catalytic activities.Funding for open access charge: CRUE-Universitat Jaume IFunding for open access charge: CRUE-Universitat Jaume IWe gratefully acknowledge financial support from the Ministerio de Ciencia y Universidades (PGC2018-093382-B-I00), Generalitat Valenciana (AICO/2019/149), and the Universitat Jaume I (UJI-B2017-07 and UJI-B2018-46). S.G. thanks the Juan de la Cierva Incorporación program (IJC2019-039982-I). We are grateful to the Serveis Centrals d'Instrumentació Científica (SCIC-UJI) for providing with spectroscopic facilities

Development and validation of a scale to assess social entrepreneurship competency in Higher Education

This paper proposes an instrument to assess social entrepreneurship competency in higher education (SECS). 19 Features of social entrepreneurship competency were identified. The pilot test (n = 497) confirmed the validity and reliability of the SECS. Exploratory factor analysis proposed a set of categories consistent with the initial approach. Confirmatory factor analysis showed acceptable relationships among the scale categories and items, while the fit indices suggested that the data fit adequately to the default model. Pearson's test verified significant, positive correlations among the revised categories in all cases. Therefore, the scale carries the potential to contribute to social entrepreneurship research

Calculations of O(p6){\cal O}(p^6) Resonance Coupling Constants in the Scalar Sector of the ENJL Model

We derive the scalar resonance coupling constants of resonance chiral theory from the Extended Nambu Jona-Lasinio model by using heat-kernel expansion.Comment: 7 page