33 results on '"Román, Paula"'
Search Results
2. The effects of silica aerogel on the rheological behaviour and polymer matrix structure of Rigid Polyurethane foams
- Author
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Cimavilla-Román, Paula, Perez-Tamarit, Saul, Vananroye, Anja, Moldenaers, Paula, and Ángel Rodriguez-Pérez, Miguel
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- 2022
- Full Text
- View/download PDF
3. Dynamic Mechanical Analysis during polyurethane foaming: Relationship between modulus build-up and reaction kinetics
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Cimavilla-Román, Paula, Santiago-Calvo, Mercedes, and Rodríguez-Pérez, Miguel Ángel
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- 2021
- Full Text
- View/download PDF
4. Influence of silica aerogel particles on the foaming process and cellular structure of rigid polyurethane foams
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Cimavilla-Román, Paula, Pérez-Tamarit, Saul, Santiago-Calvo, Mercedes, and Rodríguez-Pérez, Miguel Ángel
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- 2020
- Full Text
- View/download PDF
5. Synthesis and properties of open- and closed-porous foamed glass with a low density
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König, Jakob, Lopez-Gil, Alberto, Cimavilla-Roman, Paula, Rodriguez-Perez, Miguel A., Petersen, Rasmus R., Østergaard, Martin B., Iversen, Niels, Yue, Yuanzheng, and Spreitzer, Matjaž
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- 2020
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6. X-ray radioscopy validation of a polyol functionalized with graphene oxide for producing rigid polyurethane foams with improved cellular structures
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Santiago-Calvo, Mercedes, Pérez-Tamarit, Saúl, Cimavilla-Román, Paula, Blasco, Victoria, Ruiz, Carolina, París, Rodrigo, Villafañe, Fernando, and Rodríguez-Pérez, Miguel Ángel
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- 2019
- Full Text
- View/download PDF
7. Technological proximity and the intensity of collaboration along the innovation funnel: direct and joint effects on innovative performance
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Anzola-Román, Paula, Bayona-Sáez, Cristina, García-Marco, Teresa, and Lazzarotti, Valentina
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- 2019
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- View/download PDF
8. Organizational innovation, internal R&D and externally sourced innovation practices: Effects on technological innovation outcomes
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Anzola-Román, Paula, Bayona-Sáez, Cristina, and García-Marco, Teresa
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- 2018
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9. Unveiling the Inner Structure of Micrometric Hollow Polymeric Fibers Using Synchrotron X-Ray Nanotomography.
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Torre, Jorge, Cimavilla-Román, Paula, Cuadra-Rodríguez, Daniel, Rodríguez-Pérez, Miguel Ángel, Guttmann, Peter, Werner, Stephan, Pinto, Javier, and Barroso-Solares, Suset
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- 2024
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10. Epidemic history and baseline resistance to NS5A-specific direct acting drugs of hepatitis C virus in Spain
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Palladino, Claudia, Ezeonwumelu, Ifeanyi Jude, Mate-Cano, Irene, Borrego, Pedro, Martínez-Román, Paula, Arca-Lafuente, Sonia, Resino, Salvador, Taveira, Nuno, and Briz, Verónica
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- 2020
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11. Comparison of methods and characterization of small RNAs from plasma extracellular vesicles of HIV/HCV coinfected patients
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Martínez-González, Elena, Brochado-Kith, Óscar, Gómez-Sanz, Alicia, Martín-Carbonero, Luz, Jimenez-Sousa, Ma Ángeles, Martínez-Román, Paula, Resino, Salvador, Briz, Verónica, and Fernández-Rodríguez, Amanda
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- 2020
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12. HCV-coinfection is related to an increased HIV-1 reservoir size in cART-treated HIV patients: a cross-sectional study
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López-Huertas, Maria Rosa, Palladino, Claudia, Garrido-Arquero, Marta, Esteban-Cartelle, Beatriz, Sánchez-Carrillo, Marta, Martínez-Román, Paula, Martín-Carbonero, Luz, Ryan, Pablo, Domínguez-Domínguez, Lourdes, Santos, Ignacio De Los, Moral, Sara De La Fuente, Benito, José Miguel, Rallón, Norma, Alcamí, José, Resino, Salvador, Fernández-Rodríguez, Amanda, Coiras, Mayte, Briz, Verónica, and on behalf of the Multidisciplinary Group of viral coinfection HIV/Hepatitis (COVIHEP)
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- 2019
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13. Different HCV exposure drives specific miRNA profile in PBMCS of HIV patients
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Valle-Millares, Daniel, Brochado-Kith, Óscar, Martín-Carbonero, Luz, Domínguez-Domínguez, Lourdes, Ryan, Pablo, De los Santos, Ignacio, De la Fuente, Sara, Castro, Juan M., Lagarde, María, Cuevas, Guillermo, Mayoral-Muñoz, Mario, Matarranz, Mariano, Díez, Victorino, Gómez-Sanz, Alicia, Martínez-Román, Paula, Crespo-Bermejo, Celia, Palladino, Claudia, Muñoz-Muñoz, María, Jiménez-Sousa, María A., Resino, Salvador, Briz, Verónica, Fernández-Rodríguez, Amanda, Multidisciplinary Group of Viral Coinfection HIV/Hepatitis, UAM. Departamento de Medicina, Instituto de Salud Carlos III, Fundación Universidad Alfonso X el Sabio, Fundación Banco Santander, Red de Investigación Cooperativa en Investigación en Sida, Centro de Investigación Biomédica en Red - CIBERINFEC (Enfermedades Infecciosas), Repositório da Universidade de Lisboa, Universidad Alfonso X El Sabio, Red Española de Investigación en SIDA, Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (España), Valle-Millares, Daniel, Brochado-Kith, Óscar, Martín-Carbonero, Luz, Domínguez-Domínguez, Lourdes, Ryan, Pablo, De Los Santos, Ignacio, Lagarde, María, Cuevas, Guillermo, Matarranz, Mariano, Díez, Victorino, Gómez-Sanz, Alicia, Crespo-Bermejo, Celia, Palladino, Claudia, Muñoz-Muñoz, María, Jiménez-Sousa, María A, Resino, Salvador, Briz, Verónica, and Fernández-Rodríguez, Amanda
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QH301-705.5 ,Medicina ,Human immunodeficiency virus (HIV) ,Medicine (miscellaneous) ,Acute infection ,medicine.disease_cause ,PI3K signaling ,Peripheral blood mononuclear cell ,General Biochemistry, Genetics and Molecular Biology ,Article ,chemistry.chemical_compound ,Spontaneous viral clearance ,microRNA ,medicine ,Biology (General) ,Gene ,business.industry ,virus diseases ,HIV ,Virology ,digestive system diseases ,MicroRNAs ,chemistry ,High throughput sequence ,Antifolate ,HCV ,Hiv patients ,business - Abstract
18 Pág. Departamento de Mejora Genética Animal, Micro RNAs (miRNAs) are essential players in HIV and HCV infections, as both viruses modulate cellular miRNAs and interact with the miRNA-mediated host response. We aim to analyze the miRNA profile of HIV patients with different exposure to HCV to explore specific signatures in the miRNA profile of PBMCs for each type of infection. We massively sequenced small RNAs of PBMCs from 117 HIV+ infected patients: 45 HIV+ patients chronically infected with HCV (HIV/HCV+), 36 HIV+ that spontaneously clarified HCV after acute infection (HIV/HCV-) and 36 HIV+ patients without previous HCV infection (HIV). Thirty-two healthy patients were used as healthy controls (HC). Differential expression analysis showed significantly differentially expressed (SDE) miRNAs in HIV/HCV+ (n = 153), HIV/HCV- (n = 169) and HIV (n = 153) patients. We found putative dysregulated pathways, such as infectious-related and PI3K signaling pathways, common in all contrasts. Specifically, putatively targeted genes involved in antifolate resistance (HIV/HV+), cancer-related pathways (HIV/HCV-) and HIF-signaling (HIV) were identified, among others. Our findings revealed that HCV strongly influences the expression profile of PBMCs from HIV patients through the disruption of its miRNome. Thus, different HCV exposure can be identified by specific miRNA signatures in PBMCs., This work has been supported by grants from Institute of Health Carlos III, [PI15CIII/00031 and PI18CIII/00020/ to AFR and VB] and the Foundation Universidad Alfonso X el Sabio-Santander [grant number 1.010.932 to AFR] and the Spanish AIDS Research Network (RD16CIII/0002/0002), and Centro de Investigación Biomédica en Red (CIBER) en Enfermedades Infecciosas (CB21/13/00044). AFR is supported by the Miguel Servet programme from Fondo de Investigación Sanitaria (ISCIII) [CP14/CIII/00010 and CPII20CIII/0001]
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- 2021
14. University spin-offs: a case study on their characterization, challenges and entrepreneurship ecosystem
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Anzola Román, Paula, Bayona Sáez, Cristina, Universidad Pública de Navarra. Departamento de Gestión de Empresas, and Nafarroako Unibertsitate Publikoa. Enpresen Kudeaketa Saila
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Case study ,Entrepreneurship ,Ambidexteriry ,Technology-based companies ,Entrepreneurial ecosystem ,University spin-offs - Abstract
University has moved away from the ‘ivory tower’ conceptualization that characterized it as an isolated and inexpugnable knowledge fortress. On the contrary, universities fully participate today of a system, acting the main agent for the dissemination of knowledge and technological change, but permeating its borders to be in full contact with its context. Academic literature, noting these transformations, has coined the term ‘entrepreneurial university’, to refer to this institution that interacts with private companies and other economic agents, exploiting entrepreneurship opportunities, and thus contributing to economic and social development. Within the context of the ‘entrepreneurial university’, this work focuses on business initiatives arising from academic R&D activities. For this purpose, the research provides a comparative study and a multiple case study based on in-depth interviews with the founding leaders of six firms constituted as spin-offs from the Public University of Navarra (henceforward, UPNA) and other agents related. The objective is to determine a characterization for these types of firms, with the aim of contributing to the literature regarding the phenomenon of university spin-offs and its idiosyncrasy. In turn, this work intends also to identify the main challenges faced by these firms, and to carry out an exploratory study on how the entrepreneurship ecosystem –promoted by the University- helps in overcoming these challenges. In this sense, the results of the analysis highlight the difficulties regarding the need to combine practices to explore disruptive technologies with the need to guarantee a sustainable model for the exploitation of the products developed by these spin-offs. Therefore, this study concludes that the main challenge for university spin-offs is ambidexterity. In addition, it elaborates on the relevance of the support instruments provided by the ecosystem, which intend to complement the initial deficiencies of university spin-offs in matters of management and commercial strategy. This insight is undoubtedly useful for practitioners, researches and policy makers alike.
- Published
- 2021
15. Design and validation of experimental methods for probing foam formation dynamics and cellular structure
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Cimavilla Román, Paula, Rodríguez Pérez, Miguel Ángel, and Universidad de Valladolid. Escuela de Doctorado
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2210.90 Química-Física de Polímeros ,Polímeros ,Polimeros y polimerización ,Cellular Materials ,Polymers ,Foams ,Espumas ,Materiales Celulares - Abstract
The present thesis focuses on the development of new experimental techniques to study the process-structure-properties relationship in polymeric foams. To achieve this objective rigid polyurethane (RPU) foams were studied. Methodologies have been developed to investigate the synthesis of RPU foams from complementary rheological, physicochemical and structural points of view. To validate the potential of the methods, the effect of different catalyst and blowing agent concentrations on the synthesis of these foams has been systematically studied. As a result of this research, new methods of characterisation of the synthesis process have been obtained at laboratory level, these are based on Dynamic Mechanical Analysis (DMA), Shear Rheology, as well as X-ray tomography and X-ray radioscopy. Furthermore, the development and application of these techniques has allowed to understand the effect of micrometric Silica Aerogel particles on the synthesis, cellular structure and thermal insulation properties of RPU foams reinforced with these particles. The joint evaluation of the reaction kinetics, polymer matrix development and cell structure of RPU foams has identified new ways for the future improvement and optimisation of RPU-Aerogel composite materials with great potential to replace traditional thermal insulators. The present thesis is part of the research activities carried out in the CellMat Laboratory of the Department of Condensed Matter Physics of the University of Valladolid and has been supervised by Prof. Dr. Miguel Ángel Rodríguez-Pérez, director of this laboratory and professor at the University of Valladolid. This thesis has been written as a compendium of eight publications, five of which have already been published in international journals. In addition, this thesis meets the requirements to be accredited with an International Mention., La presente tesis se centra en el desarrollo de nuevas técnicas experimentales para estudiar la relación proceso-estructura-propiedades en las espumas poliméricas. Para alcanzar este objetivo se estudiaron principalmente espumas de poliuretano rígido (RPU). Se han desarrollado metodologías que permiten investigar la síntesis de las espumas de RPU desde puntos de vista complementarios, reológico, fisicoquímicos y estructural. Para validar el potencial de los métodos se ha estudiado de forma sistemática el efecto de distintas concentraciones de catalizador y agente espumante en la síntesis de estas espumas. Como resultado de esta investigación se han podido obtener nuevos métodos de caracterización a nivel de laboratorio del proceso de síntesis, basados en Análisis Mecánico Dinámico (DMA), Reología de Cizalla, así como tomografía y radioscopía de rayos X. Además, el desarrollo y aplicación de estas técnicas ha permitido comprender el efecto de partículas micrométricas de Aerogel de Silice en la síntesis, estructura celular y propiedades de aislamiento térmico de espumas de RPU reforzadas con dichas partículas. La evaluación conjunta de las cinética de reacción, desarrollo de la matriz polimérica y de la estructura celular de las espumas de RPU ha permitido identificar vías para la mejora y optimización futura de materiales compuestos de RPU-Aerogel con gran potencial para sustituir a los aislantes térmicos tradicionales. La presente tesis es parte de las actividades de investigación desarrolladas en el Laboratorio CellMat del Departamento de Física de la Materia Condensada de la Universidad de Valladolid y ha sido supervisada por el Prof. Dr. Miguel Ángel Rodríguez-Pérez, director de este laboratorio y catedrático de la Universidad de Valladolid. Esta tesis se ha escrito como compendio de ocho publicaciones, cinco de las cuales ya han sido publicadas en revistas internacionales. Además, esta tesis reúne los requerimientos para ser acreditada con Mención Internacional., Escuela de Doctorado, Doctorado en Física
- Published
- 2021
16. Dynamics of HIV Reservoir and HIV-1 Viral Splicing in HCV-Exposed Individuals after Elimination with DAAs or Spontaneous Clearance.
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Martínez-Román, Paula, Crespo-Bermejo, Celia, Valle-Millares, Daniel, Lara-Aguilar, Violeta, Arca-Lafuente, Sonia, Martín-Carbonero, Luz, Ryan, Pablo, de los Santos, Ignacio, López-Huertas, María Rosa, Palladino, Claudia, Muñoz-Muñoz, María, Fernández-Rodríguez, Amanda, Coiras, Mayte, and Briz, Verónica
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HIV , *VIRAL load , *HEPATITIS C virus , *TAT protein , *VIRAL proteins - Abstract
Background: Although human immunodeficiency virus type 1 (HIV-1) reservoir size is very stable under antiretroviral therapy (ART), individuals exposed to the Hepatitis C virus (HCV) (chronically coinfected and spontaneous clarifiers) show an increase in HIV reservoir size and in spliced viral RNA, which could indicate that the viral protein regulator Tat is being more actively synthesized and, thus, could lead to a higher yield of new HIV. However, it is still unknown whether the effect of HCV elimination with direct-acting antivirals (DAAs) could modify the HIV reservoir and splicing. Methods: This longitudinal study (48 weeks' follow-up after sustained virological response) involves 22 HIV+-monoinfected individuals, 17 HIV+/HCV- spontaneous clarifiers, and 24 HIV+/HCV+ chronically infected subjects who eliminated HCV with DAAs (all of them aviremic, viral load < 50). Viral-spliced RNA transcripts and proviral DNA copies were quantified by qPCR. Paired samples were analyzed using a mixed generalized linear model. Results: A decrease in HIV proviral DNA was observed in HIV+/HCV- subjects, but no significant differences were found for the other study groups. An increased production of multiple spliced transcripts was found in HIV+ and HIV+/HCV+ individuals. Conclusions: We conclude that elimination of HCV by DAAs was unable to revert the consequences derived from chronic HCV infection for the reservoir size and viral splicing, which could indicate an increased risk of rapid HIV-reservoir reactivation. Moreover, spontaneous clarifiers showed a significant decrease in the HIV reservoir, likely due to an enhanced immune response in these individuals. [ABSTRACT FROM AUTHOR]
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- 2022
- Full Text
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17. Sub-pixel Tomographic Methods for Characterizing the Solid Architecture of Foams.
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Cimavilla-Román, Paula, Pérez-Tamarit, Saúl, Barroso-Solares, Suset, Pinto, Javier, and Rodríguez-Pérez, Miguel Ángel
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- 2022
- Full Text
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18. University Spin-Offs: A Case Study on Their Characterization, Challenges and Entrepreneurship Ecosystem.
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Anzola-Román, Paula and Bayona-Sáez, Cristina
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ENTREPRENEURSHIP education ,ENTREPRENEURSHIP ,PUBLIC universities & colleges ,DISRUPTIVE innovations ,SOCIAL development ,ECOSYSTEMS - Abstract
University has moved away from the ‘ivory tower’ conceptualization that characterized it as an isolated and inexpugnable knowledge fortress. On the contrary, universities fully participate today of a system, acting the main agent for the dissemination of knowledge and technological change, but permeating its borders to be in full contact with its context. Academic literature, noting these transformations, has coined the term ‘entrepreneurial university’, to refer to this institution that interacts with private companies and other economic agents, exploiting entrepreneurship opportunities, and thus contributing to economic and social development. Within the context of the ‘entrepreneurial university’, this work focuses on business initiatives arising from academic R&D activities. For this purpose, the research provides a comparative study and a multiple case study based on in-depth interviews with the founding leaders of six firms constituted as spin-offs from the Public University of Navarra (henceforward, UPNA) and other agents related. The objective is to determine a characterization for these types of firms, with the aim of contributing to the literature regarding the phenomenon of university spin-offs and its idiosyncrasy. In turn, this work intends also to identify the main challenges faced by these firms, and to carry out an exploratory study on how the entrepreneurship ecosystem –promoted by the University- helps in overcoming these challenges. In this sense, the results of the analysis highlight the difficulties regarding the need to combine practices to explore disruptive technologies with the need to guarantee a sustainable model for the exploitation of the products developed by these spin-offs. Therefore, this study concludes that the main challenge for university spin-offs is ambidexterity. In addition, it elaborates on the relevance of the support instruments provided by the ecosystem, which intend to complement the initial deficiencies of university spin-offs in matters of management and commercial strategy. This insight is undoubtedly useful for practitioners, researches and policy makers alike. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
19. Study of primary care referrals to Mental Health centers in adult patients in Madrid Region
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Díaz, Juan, Díaz-de-Neira, Mónica, Jarabo, Andrea, Roig, Pilar, and Román, Paula
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Estudio de partes de interconsulta ,lcsh:Psychology ,Derivación de pacientes ,lcsh:BF1-990 ,Mental health ,Consultation reports study ,Atención primaria ,Primary care ,Salud Mental ,Referral of patients - Abstract
Resumen En el presente trabajo se estudian y analizan variables sociodemográficas, clínicas y asistenciales incluidas en los partes de interconsulta (PIC) que traen los pacientes adultos durante un periodo de 15 días recogidos de forma consecutiva en los meses de marzo a junio del 2015 en tres centros de Salud Mental de Madrid (CSM Colmenar Viejo, CSM Vallecas Villa y CSM Villaverde). El estudio estadístico mediante el análisis de variables descriptivas y variables dicotómicas muestra los siguientes resultados: dos tercios de las derivaciones a salud mental son a psiquiatría y un tercio están destinadas a psicología clínica; el tiempo medio de espera para la primera consulta en psicología es de 74 días frente a 38 días en psiquiatría; el 31% de las derivaciones son con carácter preferente con un tiempo medio de demora de 28 días y la mayor parte de las mismas se dirigen a la especialidad de psiquiatría; las principales patologías derivadas son trastornos de ansiedad, cuadros adaptativos y depresivos; el 46.7% de los pacientes derivados a salud mental toman ya algún psicofármaco; las derivaciones a psicología clínica se realizan con pacientes más jóvenes y menos medicados, con menor carácter de urgencia y con menos especificaciones sobre información diagnóstica y farmacológica en los PIC que las derivaciones a psiquiatría. Estos resultados son en su mayoría coherentes con los encontrados en estudios previos, aunque faltan investigaciones que incluyan varios CSM o analicen la información cualitativa de los PIC de derivación. Abstract In this paper, we analyze the sociodemographic, clinical, and health care variables included in the interconsultation reports (PIC) that bring adult patients over a period of 15 days, collected consecutively in the months of March through June 2015 from three mental health centers in Madrid (Colmenar Viejo CSM, Villaverde CSM, and Vallecas Villa CSM). The statistical analysis of data, including analysis of descriptive variables and dichotomous variables, shows the following results: two thirds of referrals are transfers to psychiatry and one third are transfers to clinical psychology; mean time in the waiting list is 74 days for clinical psychology consultation and 38 days for psychiatry consultation; preferential referrals are 31%, with 28 days of mean time in waiting list, being mostly intended for psychiatry; main referred pathologies are anxiety and adaptive and depressive disorders; 46.7% of patients transferred to mental health were already taking some psychiatric medication; clinical psychology referrals involve significantly younger and less medicated patients, significantly less preferential, and with fewer diagnostic and pharmacologic specifications in the PIC than psychiatry referrals. These results are consistent with previous studies, although we have not found other studies that include more than one mental health center, or analyze qualitative information contained in the inter-consultation reports.
- Published
- 2017
20. Profiting from collaborative and organizational innovation practices: a research through case studies and quantitative analysis
- Author
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Anzola Román, Paula, Bayona Sáez, Cristina, García Marco, María Teresa, Universidad Pública de Navarra. Departamento de Gestión de Empresas, and Nafarroako Unibertsitate Publikoa. Enpresen Kudeaketa Saila
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I+D+i ,Innovación ,R+D+i ,Innovation - Abstract
Esta investigación abarca una amplia variedad de prácticas de innovación, y pretende avanzar en la comprensión sobre el aprovechamiento de las mismas, teniendo en cuenta factores contextuales y los potenciales efectos de su adopción conjunta. En concreto, los estudios que conforman esta tesis profundizan en la implementación y los efectos de prácticas internas de I+D+i, actividades de I+D+i desarrolladas en colaboración con agentes externos y prácticas de innovación organizativa. A tal efecto, la tesis adopta una perspectiva holística que abarca la complejidad de estos procesos de innovación y la naturaleza diversa de las contingencias que pueden afectarlos. De esta forma, la investigación se ha desarrollado a través de métodos cualitativos y cuantitativos. Así, el estudio de casos llevado a cabo en una primera etapa contribuye a la formulación de las preguntas de investigación de la segunda fase, cuyo análisis se desarrolla a través de la estimación de modelos causales y basa la interpretación de los resultados en el cálculo de efectos marginales. Las conclusiones del primer estudio cualitativo subrayan la importancia de la innovación organizativa para la generación de valor en las empresas, y sugieren que ésta favorece la explotación de los resultados de las prácticas de innovación tecnológica. El tercer estudio testea estas conclusiones a través de un análisis cuantitativo, y presenta evidencia de la existencia de efectos complementarios entre la adopción de prácticas de innovación tecnológica (tanto internas como en colaboración) y de innovación organizativa con respecto a la generación de innovaciones complejas (de producto y proceso conjuntamente). El estudio múltiple de casos presentado en el capítulo dos concluye con la propuesta de un marco teórico sobre el efecto de factores contextuales organizativos en el aprovechamiento de prácticas de innovación en colaboración a lo largo del proceso innovador. Con similares objetivos de avanzar en la comprensión del aprovechamiento de este tipo de prácticas, teniendo en cuenta la influencia de decisiones estratégicas y de contingencias internas, el último estudio presenta un análisis cuantitativo sobre los efectos causales en el desempeño innovador de la proximidad tecnológica y de la intensidad de la colaboración en las distintas etapas del proceso. La evidencia hallada sugiere que las empresas deberían intentar colaborar intensamente con socios tecnológicamente próximos, y prestar atención a los mecanismos de protección, especialmente cuando se colabora en las fases tardías del proceso innovador. This research covers a wide range of innovation practices, and intends to advance the understanding of how to better profit from their implementation, taking into account contextual factors and the potential effects of their joint adoption. In particular, the studies presented here delve into the implementation and effects of in-house R&D&I practices, collaborative R&D&I activities developed with the participation of external agents, and organizational innovation practices. In order to do so, the thesis adopts a comprehensive approach that encompasses the complexity of these innovative processes and the diverse range of contingencies affecting them. Therefore, the research is conducted through both qualitative and quantitative methods. Indeed, the case study methodology applied in the first stage of the investigation helps to define and formulate the research questions for the second stage, whose analysis is conducted through the estimation of causal models, and implies an interpretation of the results by means of calculating average marginal effects. The conclusions from the first qualitative study highlight the relevance of the implementation of organizational innovation practices for value generation in firms, suggesting that organizational innovations allow for better exploitation of the results of technological innovation practices. The third study tests these conclusions through a quantitative analysis, providing evidence of the complementary effect of technological (be it internal or collaborative) and organizational innovation practices when pursuing the generation of complex technological innovations (both product and process innovations). The multiple case study presented in chapter two results in the proposal of a theoretical framework on how organizational context factors influence the profiting of collaborative innovation practices along the stages of the process. Also with purposes of better understanding how firms may profit from collaborative innovation practices, taking into account the potential influence of strategic decisions and internal context contingencies, the study described in chapter four presents a quantitative analysis on the causal effects on innovative performance of technological proximity and the intensity of collaboration in different stages of the process. The evidence found here suggests that firms should try to collaborate intensely with technologically proximate partners, and pay attention to proper protection mechanisms, especially when collaborating in the later stages of the innovation process. Programa de Doctorado en Economía, Empresa y Derecho (RD 99/2011) Ekonomiako, Enpresako eta Zuzenbideko Doktoretza Programa (ED 99/2011)
- Published
- 2018
21. Nanotechnology: A reality for diagnosis of HCV infectious disease.
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Arca-Lafuente, Sonia, Martínez-Román, Paula, Mate-Cano, Irene, Madrid, Ricardo, and Briz, Verónica
- Abstract
Hepatitis C virus (HCV) is the primary etiologic agent of liver cirrhosis or hepatocellular carcinoma. HCV elevated infection rates are mostly due to the lack of an accurate and accessible screening and diagnosis, especially in low- and middle-income countries. Conventional HCV diagnostic algorithm consists of a serological test followed by a nucleic acid test. This sequence of tests is time consuming and not affordable for low-resource settings. Nanotechnology have introduced new promising tests for the diagnose of infectious diseases. Based on the employment of nanoparticles and other nanomaterials which lead to highly sensitive and specific nanoscale tests, most of them target pathogen genome. Implementation of nanoscale tests, which are affordable, portable and easy to use by non-specialized personal, would improve HCV diagnosis algorithm. In this review, we have summed up the current emerging nanotechnology tools, which will improve actual screening and treatment programs, and help to reach HCV elimination proposal. [ABSTRACT FROM AUTHOR]
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- 2020
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22. Profiting from collaborative innovation practices: Identifying organizational success factors along the process.
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Anzola-Román, Paula, Bayona-Sáez, Cristina, and García-Marco, Teresa
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- 2019
- Full Text
- View/download PDF
23. Profiting from coupled open innovation practices: an exploratory research.
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Román, Paula Anzola, Sáez, Cristina Bayona, and García-Marco, Teresa
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OPEN innovation ,VALUE capture ,RESEARCH & development ,COMMERCIALIZATION ,BUSINESS development - Abstract
The research on the innovation phenomenon assumes that many of the innovative practices are not based on activities of internal R&D departments, but are instead developed through networking and imply the involvement of different kinds of agents. This paper aims to answer the following question: how do companies profit from coupled innovation practices? For this purpose, three case studies are discussed by means of applying a conceptual framework that structures the coupled innovation process in three areas of relevance: development, integration and commercialization of the innovation. The analysis will lead to the verification of the propositions stated based on the literature review contemplating coupled innovation practices and to the identification of the factors that are critical for profiting from said practices. [ABSTRACT FROM AUTHOR]
- Published
- 2015
24. Organizational Innovation as Leverage for Open Innovation Practices: A Business Model Perspective.
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Román, Paula Anzola, Bayona-Sáez, Cristina, and García-Marco, Teresa
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OPEN innovation ,ORGANIZATIONAL change ,BUSINESS models ,INNOVATION management ,INNOVATIONS in business - Abstract
Open Innovation is currently one of the hottest topics in innovation management. However, there is still research to be done regarding the process through which companies incorporate Open Innovation practices and take advantage of them. Moreover, innovation is nowadays much more than just technology and R & D it must include organizational innovation. A business model perspective may provide valuable insight into a very important question: how do firms turn their innovation efforts into value and how do they capture part of that value? This paper addresses this topic through an in-depth case study. The firm studied is a brake systems designer and manufacturer that underwent a profound process of strategic change in order to adapt its evolving environment. In this process, not only market related decisions were taken, but also (and very importantly) deep organizational innovation took place. All this in a context of openness in which the company had already been moving, but which begun to be systematized thanks to the implementation of the new structure. With regard to the business model concept, this paper adopts the definition of Osterwalder and Pigneur (2009), the developers of the widely used "Business model canvas" tool for describing and discussing business models. Based on this framework, the paper analyses the process of change undergone by the firm and illustrates how and to what extent the organizational innovation contributes to the creation and capture of value, focusing especially on the way in which the Open Innovation practices are leveraged by an appropriate business model design. [ABSTRACT FROM AUTHOR]
- Published
- 2013
25. Cold neutron transmission for the in-situ analysis of the gas diffusion in polymers.
- Author
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Martín-de León, Judith, Cimavilla-Román, Paula, Bernardo, Victoria, Solórzano, Eusebio, Kardjilov, Nikolai, and Rodríguez-Pérez, Miguel A.
- Subjects
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NEUTRON radiography , *GAS analysis , *POLYMERS , *DIFFUSION kinetics , *DIFFUSION , *DIFFUSION processes - Abstract
A novel set-up for monitoring the gas diffusion process in polymers has been developed. This set-up is based on performing neutron radiography and tomography of polymeric materials under high pressures of gas. Information about the absorption kinetics of supercritical CO 2 was obtained. Additionally, solubility, diffusivity, and macroscopic changes in the dimensions of the samples can be in-situ obtained through the developed measurement technique. This novel approach can be very helpful to analyze the diffusion kinetics in a wide range of polymers. [Display omitted] • In-situ visualization of gas diffusion process in polymers. • Neutron radiography and tomography of gas diffusion in polymers. • In situ dimensions evolution of polymers under gas pressure. • In situ solubility and diffusivity evolution of polymers under gas pressure. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
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26. Provirus reactivation is impaired in HIV-1 infected individuals on treatment with dasatinib and antiretroviral therapy.
- Author
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Vigón, Lorena, Martínez-Román, Paula, Rodríguez-Mora, Sara, Torres, Montserrat, Puertas, María C., Mateos, Elena, Salgado, María, Navarro, Antonio, Sánchez-Conde, Matilde, Ambrosioni, Juan, Cervero, Miguel, Wyen, Christoph, Hoffmann, Christian, Miró, José M, Alcamí, José, Podzamczer, Daniel, García-Gutiérrez, Valentín, Martínez-Picado, Javier, Briz, Verónica, and Rosa López-Huertas, María
- Subjects
- *
DASATINIB , *HIV , *ANTIRETROVIRAL agents , *CHRONIC myeloid leukemia , *T cells , *HEPATITIS B virus - Abstract
[Display omitted] The latent viral reservoir formed by HIV-1, mainly in CD4 + T cells, is responsible for the failure of antiretroviral therapy (ART) to achieve a complete elimination of the virus in infected individuals. We previously determined that CD4 + T cells from individuals with chronic myeloid leukemia (CML) on treatment with dasatinib are resistant to HIV-1 infection ex vivo. The main mechanism for this antiviral effect is the preservation of SAMHD1 activity. In this study, we aimed to evaluate the impact of dasatinib on the viral reservoir of HIV-infected individuals with CML who were on simultaneous treatment with ART and dasatinib. Due to the low estimated incidence of HIV-1 infection and CML (1:65,000), three male individuals were recruited in Spain and Germany. These individuals had been on treatment with standard ART and dasatinib for median 1.3 years (IQR 1.3–5.3 years). Reservoir size and composition in PBMCs from these individuals was analyzed in comparison with HIV-infected individuals on triple ART regimen and undetectable viremia. The frequency of latently infected cells was reduced more than 5-fold in these individuals. The reactivation of proviruses from these cells was reduced more than 4-fold and, upon activation, SAMHD1 phosphorylation was reduced 40-fold. Plasma levels of the homeostatic cytokine IL-7 and CD4 effector subpopulations TEM and TEMRA in peripheral blood were also reduced. Therefore, treatment of HIV-infected individuals with dasatinib as adjuvant of ART could disturb the reservoir reactivation and reseeding, which might have a beneficial impact to reduce its size. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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27. Modelling of the mechanisms of heat transfer in recycled glass foams.
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Cimavilla-Román, Paula, Villafañe-Calvo, Juan, López-Gil, Alberto, König, Jakob, and Rodríguez-Perez, Miguel Ángel
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CELLULAR glass , *HEAT transfer , *FOAM , *THERMAL conductivity measurement , *HEAT radiation & absorption , *THERMAL insulation - Abstract
• Low thermal conductivity foams prepared from recycled panel glass have been produced. • The mechanisms of heat transfer through glass foams of varying density and microstructure are evaluated. • A new model accounting for the scattering of radiation in foams with bimodal cellular structures is proposed. • The contribution of each heat transfer mechanism and the thermal conductivity of glass foams at different temperatures are predicted by the model. • The model is validated using experimental measurements and the deviation is below 2%. Glass foams are highly sustainable materials with enormous potential to replace traditional thermal insulators. Current research on glass foams is focused on improving thermal insulation by reducing density, but this is somehow a limited approach. Selecting the best approach to reduce thermal conductivity relies on establishing a detailed knowledge on the heat transfer mechanisms playing the most significant role. We have studied the mechanisms of heat transfer in a set of cathode-ray-tube (CRT) panel glass foams. The influence of relative density, cellular structure, gas composition, glass distribution between cell walls and struts, and radiation on heat transfer is addressed. From a detailed characterisation and state-of-the-art models, we have created a new analytical model adapted to the peculiarities of the foams under analysis. Additionally, the thermal conductivity for varying temperature conditions has been predicted. The obtained results point out to a significant contribution of the heat transfer by radiation for foams with porosities higher than 0.96. The predicted values of thermal conductivity indicate the existence of a plateau region at high porosities. Temperature is proven to shift the contributions of heat transfer, increasing the weight of radiation and gas conduction. The predictions of the new analytical model have been contrasted with experimental measurements of the thermal conductivity at different densities and temperatures obtaining differences below 2%. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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28. Hepatitis C Virus Influences HIV-1 Viral Splicing in Coinfected Patients.
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Martínez-Román, Paula, López-Huertas, María Rosa, Crespo-Bermejo, Celia, Arca-Lafuente, Sonia, Cortegano, Isabel, Valle-Millares, Daniel, Gaspar, María Luisa, Martín-Carbonero, Luz, Domínguez-Domínguez, Lourdes, Ryan, Pablo, de los Santos, Ignacio, de la Fuente-Moral, Sara, Fernández-Rodríguez, Amanda, Coiras, Mayte, and Briz, Verónica
- Subjects
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HEPATITIS C virus , *HIV-positive persons , *MIXED infections - Abstract
Coinfection with hepatitis C virus (HCV) influences HIV reservoir size. However, it is unknown whether this coinfection also induces a higher provirus transcription. Viral transcription is promoted by synergy between cellular factors such as NF-κB and the viral regulator Tat. The impact of HCV coinfection on HIV provirus transcription was analyzed in resting (r)CD4 T+ cells (CD3+CD4+CD25-CD69-HLADR-) and rCD4 T cells-depleted PBMCs (rCD4 T- PBMCs) from a multicenter cross-sectional study of 115 cART-treated HIV patients: 42 HIV+/HCV+ coinfected individuals (HIV+/HCV+), 34 HIV+ patients with HCV spontaneous clearance (HIV+/HCV−) and 39 HIV patients (HIV+). Viral transcription was assessed in total RNA through the quantification of unspliced, single spliced, and multiple spliced viral mRNAs by qPCR. Linear correlations between viral reservoir size and viral splicing were determined. A 3-fold increase of multiple spliced transcripts in rCD4 T+ cells of HIV+/HCV+ patients was found compared to HIV+ individuals (p < 0.05). As Tat is synthesized by multiple splicing, the levels of Tat were also quantified in these patients. Significant differences in single and multiple spliced transcripts were also observed in rCD4 T- PBMCs. Levels of multiple spliced mRNAs were increased in rCD4 T+ cells isolated from HIV+/HCV+ subjects, which could indicate a higher Tat activity in these cells despite their resting state. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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29. Overcoming the Challenge of Producing Large and Flat Nanocellular Polymers: A Study with PMMA.
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Martín‐de León, Judith, Bernardo, Victoria, Cimavilla‐Román, Paula, Pérez‐Tamarit, Saúl, and Rodríguez‐Pérez, Miguel Ángel
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SPECIFIC gravity ,CELL anatomy ,POLYMETHYLMETHACRYLATE ,MECHANICAL properties of condensed matter ,CELL size ,HOT pressing - Abstract
Although nanocellular polymers are interesting materials with improved properties in comparison with conventional or microcellular polymers, the production of large and flat parts of those materials is still challenging. Herein, gas dissolution foaming process is used to produce large and flat nanocellular polymethylmethacrylate samples. In order to do that, the foaming step is performed in a hot press. The methodology is optimized to produce flat samples with dimensions of 100 × 100 × 6 mm3, relative densities in the range 0.25–0.55 and cell sizes around 250 nm. Additionally, foaming parameters are modified to study their influence on the final cellular structure, and the materials produced in this paper are compared with samples produced by using a most conventional approach in which foaming step is conducted in a thermal bath. Results obtained show that an increment in the foaming temperature leads to a reduction in relative density and an increase of cell nucleation density. Moreover, differences in the final cellular structure for materials produced by both foaming routes are studied, proving that although there exist some differences, the mechanisms governing the nucleation and growing are the same in both processes, leading to the production of homogeneous materials with very similar cellular structures. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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30. Epidemiological trend of hospitalized acute and recurrent hepatitis C in Spain.
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Maté-Cano, Irene, Alvaro-Meca, Alejandro, Ryan, Pablo, Diaz, Asuncion, Martínez-Román, Paula, Sánchez-Carrillo, Marta, Resino, Salvador, and Briz, Verónica
- Subjects
HEPATITIS C treatment ,HOSPITAL patients ,DISEASE relapse ,EPIDEMIOLOGY ,MEDICAL screening - Abstract
Introduction: Acute hepatitis C virus (HCV) infection (AHC) is often difficult to identify due to the lack of symptoms (around 85% of cases) [1,2]. Despite the decline of HCV transmission via blood-to-blood due to donor screening programs and a decline in intravenous drug use (IDUs) [3], the incidence of sexual transmission has now increased, particularly in human immunodeficiency virus (HIV)-infected men who have sex with men (MSM), arousing great interest in this new public health problem [4,5]. This is the first study to evaluate the incidence of hospital admissions and mortality related to admitted AHC and AHC recurrences, with particular attention to HIV-infected patients, as well as to analyze its trend through the combination antiretroviral therapy (cART) era (1997–2012) in Spain. Materials and methods: We performed a retrospective study on patients with an AHC diagnosis in the Spanish Minimum Basic Data Set (MBDS). Patients were classified as HCV-monoinfected patients and HIV/HCV-coinfected patients. The outcome variables were: i) AHC-related hospital admission; ii) AHC-related mortality (intra-hospital mortality); iii) hospital admissions related to AHC recurrences. The data were treated with full confidentiality, according to Spanish legislation. MBDS is regulated by an organic law that sets out how institutions must proceed with health-related personal data. Informed consent is not required because personal data are collected for the exercise of the functions proper to public administrative bodies. The Spanish Ministry of Health confirmed that our study fulfilled all the appropriate ethical considerations, according to Spanish legislation. Results: Overall, 5792 patients were diagnosed with AHC during the study period, 4831 subjects were HCV-monoinfected, 961 individuals were HIV/HCV-coinfected and there were 115 (1.99%) recurrences, of them, 97 (2.00%) were HVC monoinfected and 18 (1,88%) HIV/HCV coinfected, showing similar incidence in both groups. The incidence of AHC-related hospital admission in HIV/HCV-coinfected patients was 0.81 per 10,000 person-years (p-y) while in HCV-monoinfected, it was 1.2 per 100,000 p-y (p < 0.001). Both groups showed a dramatic decrease in hospital admissions during the study period (p < 0.001). The mortality over the whole follow-up in the HIV/HCV-coinfected group was 2.2 per 10,000 p-y, while in the HCV-monoinfected group it was 2.0 per 100,000 p-y (p < 0.001). AHC-related mortality diminished significantly in both groups (approximately 2–3 times) during the study period (p < 0.001). The adjusted likelihood of death for AHC was 1.90 (95%CI =2.07–3.02) times higher in HIV/HCV-coinfected patients than in HCV-monoinfected. The adjusted likelihood of AHC recurrence during the follow-up was 1.31 times higher in HIV/HCV-coinfected patients than in HCV-monoinfected patients [adjusted hazard ratio (aHR) = 1.31 (95%CI = 1.05–1.63); p = 0.013]. Discussion and conclusions: HIV/HCV-coinfected individuals were at higher risk of hospital admissions and deaths related to AHC during the cART era, with higher incidence and mortality than HCV-monoinfected subjects. Recurrence of AHC-related to hospital admissions was observed. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
31. Impulsivity, Social Environment and Delinquency: How Environmental Factors Mediate Individual Traits and Criminal Behavior.
- Author
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Diamond-Román, Paula
- Abstract
Individual trait theory suggests that constraint regulates impulsive behavior, while self-control theory suggests that self-control governs pleasurable behavior. Delinquency results from impulsive behavior or pleasure-seeking going uncontrolled. Caspi et al. (1994) collaborated on a study based on individual trait theory, focusing on three "super traits" which contribute to delinquency: constraint (traditionalism, harm avoidance and rational control), negative emotionality, and positive emotionality. Delinquent youths were less likely to be traditional/conventional or controlled/cautious and more likely to behave aggressively for their own advantage. In other words, delinquent youth were more likely to be rebellious, impulsive and antagonistic. How do environmental factors mediate individual traits that translate into criminal behavior? The family, through environment and biology, may be the primary mechanism for developing impulsive behavior, but why do some impulsive youths end up as delinquent while others do not? Bringing sociology back into the picture painted by individual trait theory, it seems that youths growing up in the social disorganization of the inner-city with blocked opportunities for diagnosis and necessary educational supports and fewer economic or educational resources may not receive psychiatric or educational interventions. How is the link between impulsivity and delinquency mediated by differing access to appropriate pre-delinquency interventions? ..PAT.-Unpublished Manuscript [ABSTRACT FROM AUTHOR]
- Published
- 2009
32. HCV eradication with DAAs differently affects HIV males and females: A whole miRNA sequencing characterization.
- Author
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Valle-Millares, Daniel, Brochado-Kith, Óscar, Gómez-Sanz, Alicia, Martín-Carbonero, Luz, Ryan, Pablo, De los Santos, Ignacio, Castro, Juan M., Troya, Jesús, Mayoral-Muñoz, Mario, Cuevas, Guillermo, Martínez-Román, Paula, Sanz-Sanz, Jesús, Muñoz-Muñoz, María, Jiménez-Sousa, María Á, Resino, Salvador, Briz, Verónica, and Fernández-Rodríguez, Amanda
- Subjects
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MICRORNA , *HIV , *VIRUS diseases , *NUCLEOTIDE sequencing , *TREATMENT effectiveness - Abstract
Gender-specific consequences after HCV eradication are unexplored. MicroRNAs (miRNAs) play a crucial role in the immune response against viral infections. However, few have highlighted miRNA role in sex-biased disease or therapy response. We aim to assess gender differences reflected in the miRNA expression of HIV/HCV-coinfected patients who achieve sustained virological response (SVR) with direct acting antivirals (DAAs). We conducted a prospective study of miRNA expression in PBMCs from 28 chronic HIV/HCV-coinfected patients (HIV/HCV) at baseline and after achieving SVR with DAAs. Sixteen HIV-monoinfected patients (HIV) and 36 healthy controls (HC) were used as controls. Identification of significant differentially expressed (SDE) miRNAs was performed with generalized linear model and mixed GLMs. We also explored putative dysregulated biological pathways. At baseline , the HIV/HCV patients showed differences in the miRNA profile concerning the HIV group (165 and 102 SDE miRNAs for males and females, respectively). Gender-stratified analysis of HIV/HCV group at baseline versus at SVR achievement showed higher differences in males (80 SDE miRNAs) than in females (55 SDE miRNAs). After SVR, HIV/HCV group showed similar values to HIV individuals, especially in females (1 SDE miRNA). However, ten miRNAs in males remained dysregulated, which were mainly involved in cancer, fatty acid, and inflammatory pathways. Taken together, our results show gender-biased dysregulation in the miRNA expression profile of PBMCs after HCV eradication with DAAs. These differences were normalized in females, while miRNA profile and their target-related pathways in males lack of normalization, which may be related to a high-risk of developing liver-related complications. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
33. Different HCV Exposure Drives Specific miRNA Profile in PBMCs of HIV Patients.
- Author
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Valle-Millares D, Brochado-Kith Ó, Martín-Carbonero L, Domínguez-Domínguez L, Ryan P, De Los Santos I, De la Fuente S, Castro JM, Lagarde M, Cuevas G, Mayoral-Muñoz M, Matarranz M, Díez V, Gómez-Sanz A, Martínez-Román P, Crespo-Bermejo C, Palladino C, Muñoz-Muñoz M, Jiménez-Sousa MA, Resino S, Briz V, Fernández-Rodríguez A, and On Behalf Of Multidisciplinary Group Of Viral Coinfection Hiv/Hepatitis Covihep
- Abstract
Micro RNAs (miRNAs) are essential players in HIV and HCV infections, as both viruses modulate cellular miRNAs and interact with the miRNA-mediated host response. We aim to analyze the miRNA profile of HIV patients with different exposure to HCV to explore specific signatures in the miRNA profile of PBMCs for each type of infection. We massively sequenced small RNAs of PBMCs from 117 HIV+ infected patients: 45 HIV+ patients chronically infected with HCV (HIV/HCV+), 36 HIV+ that spontaneously clarified HCV after acute infection (HIV/HCV-) and 36 HIV+ patients without previous HCV infection (HIV). Thirty-two healthy patients were used as healthy controls (HC). Differential expression analysis showed significantly differentially expressed (SDE) miRNAs in HIV/HCV+ ( n = 153), HIV/HCV- ( n = 169) and HIV ( n = 153) patients. We found putative dysregulated pathways, such as infectious-related and PI3K signaling pathways, common in all contrasts. Specifically, putatively targeted genes involved in antifolate resistance (HIV/HV+), cancer-related pathways (HIV/HCV-) and HIF-signaling (HIV) were identified, among others. Our findings revealed that HCV strongly influences the expression profile of PBMCs from HIV patients through the disruption of its miRNome. Thus, different HCV exposure can be identified by specific miRNA signatures in PBMCs.
- Published
- 2021
- Full Text
- View/download PDF
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