Novel Sol-Gel Route to Prepare Eu3+-Doped 80SiO2-20NaGdF4 Oxyfluoride Glass-Ceramic for Photonic Device Applications.

Oxyfluoride glass-ceramics (OxGCs) with the molar composition 80SiO2-20(1.5Eu3+: NaGdF4) were prepared with sol-gel following the "pre-crystallised nanoparticles route" with promising optical results. The preparation of 1.5 mol % Eu3+-doped NaGdF4 nanoparticles, named 1.5Eu3+: NaGdF4, was optimised and characterised using XRD, FTIR and HRTEM. The structural characterisation of 80SiO2-20(1.5Eu3+: NaGdF4) OxGCs prepared from these nanoparticles' suspension was performed by XRD and FTIR revealing the presence of hexagonal and orthorhombic NaGdF4 crystalline phases. The optical properties of both nanoparticles' phases and the related OxGCs were studied by measuring the emission and excitation spectra together with the lifetimes of the 5D0 state. The emission spectra obtained by exciting the Eu3+-O2- charge transfer band showed similar features in both cases corresponding the higher emission intensity to the 5D0→7F2 transition that indicates a non-centrosymmetric site for Eu3+ ions. Moreover, time-resolved fluorescence line-narrowed emission spectra were performed at a low temperature in OxGCs to obtain information about the site symmetry of Eu3+ in this matrix. The results show that this processing method is promising for preparing transparent OxGCs coatings for photonic applications.

Influence of Polyols on the In Vitro Biodegradation and Bioactivity of 58S Bioactive Sol-Gel Coatings on AZ31B Magnesium Alloys.

The mechanical qualities of AZ31B magnesium alloys make them a promising material for biodegradable metallic implants. However, rapid degradation limits the application of these alloys. In the present study, 58S bioactive glasses were synthesized using the sol-gel method and several polyols such as glycerol, ethylene glycol, and polyethylene glycol, were used to improve the sol stability and to control the degradation of AZ31B. The synthesized bioactive sols were dip-coated onto AZ31B substrates and then, characterized by various techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemical techniques (potentiodynamic and electrochemical impedance spectroscopy), among them. FTIR analysis confirmed the formation of a silica, calcium, and phosphate system and the XRD the amorphous nature of the 58S bioactive coatings obtained by sol-gel. The contact angle measurements confirmed that all the coatings were hydrophilic. The biodegradability response under physiological conditions (Hank's solution) was investigated for all the 58S bioactive glass coatings, observing a different behaviour depending on the polyols incorporated. Thus, for 58S PEG coating, an efficient control of the release of H2 gas was observed, and showing a pH control between 7.6 and 7.8 during all the tests. A marked apatite precipitation was also observed on the surface of the 58S PEG coating after the immersion test. Thus, the 58S PEG sol-gel coating is considered a promising alternative for biodegradable magnesium alloy-based medical implants.

Vínculos, autonomía y salud mental en adultos jóvenes del proceso de reintegración en Colombia / Bonds, autonomy and mental health in young adults of the reintegration process in Colombia

Este artículo busca explorar la construcción de los vínculos, su relación con el desarrollo de la autonomía y las problemáticas de salud mental de adultos jóvenes excombatientes de grupos armados que hacen parte del proceso de reintegración en Colombia. Se analizaron 3977 registros de la Encuesta Multimodal Psicosocial (EMP) correspondientes a adultos jóvenes entre los 18 y 24 años, que fueron aplicadas en desarrollo del proceso de reincorporación. Se aplicaron dos métodos de análisis estadísticos complementarios: el método de Componentes Principales (ACP) y un método Jerárquico aglomerativo. En el análisis de los procesos vinculares se encontró que en un grupo alrededor de un 80 % de los casos registra haber experimentado rupturas vinculares importantes a causa de la violencia, el abandono temprano y/o vivir en contextos de conflicto y violencia. En cuanto al análisis de los procesos de autonomía, se encontró que un grupo correspondiente al 70 % reporta no contar con las capacidades para garantizar su autonomía y calidad de vida, pasando por condiciones de precarización laboral con riesgo a incurrir en redes de delincuencia. Y un 39 % reporta coincidir alta disposición de riesgo en sus procesos vinculares y de autonomía.

This article seeks to explore the construction of bonds, their relation with the development of autonomy and the mental health problems of young adult ex-combatants of armed groups who are part of the reintegration process in Colombia. A total of 3977 records of the Psychosocial Multimodal Questionnaire (PMS) corresponding to young adults between 18 and 24 years old, which were applied in the development of the reincorporation process, were analyzed. Two complementary statistical analysis methods were applied: The Principal Components Method (PCA) and an agglomerative Hierarchical method. In the analysis of bonding processes, it was found that, in one group, about 80% of the cases recorded having experienced significant bonding ruptures due to violence, early abandonment and/or living in contexts of conflict and violence. Regarding the analysis of the processes of autonomy, a group corresponding to 70% reported not having the capacities to guarantee their autonomy and quality of life, going through conditions of job insecurity with the risk of incurring in criminal networks. And 39% report a high risk disposition in their relationship and autonomy processes.

Electrochemical Characterization of Polymeric Coatings for Corrosion Protection: A Review of Advances and Perspectives.

The development of anti-corrosion polymeric coatings has grown exponentially in the fields of material science, chemistry, engineering, and nanotechnology during the last century and has prompted the evolution of efficient characterization techniques. Nowadays, polymeric coatings represent a well-established protection system that provides a barrier between a metallic substrate and the environment. However, the increase in complexity and functionality of these coatings requires high-precision techniques capable of predicting failures and providing smart protection. This review summarizes the state of the art for the main electrochemical techniques, emphasizing devices that track the anti-corrosion properties of polymeric coatings from the macroscale to the nanoscale. An overview of the advances in accelerated corrosion testing and the electrochemical characterization of coatings is explored, including insights into their advantages and limitations. In addition, the challenges and potential applications of the theoretical approaches are summarized based on current knowledge. Finally, this work provides the reader with the trends and challenges of designing future technologies and models capable of tracking corrosion and predicting failures.

Role of Eu2+ and Dy3+ Concentration in the Persistent Luminescence of Sr2MgSi2O7 Glass-Ceramics.

In this study, glass-ceramics based on Sr2MgSi2O7 phosphor co-doped with Eu/Dy were obtained from the sintering and crystallisation of glass powders. The glasses were melted in a gas furnace to simulate an industrial process, and the dopant concentration was varied to optimise the luminescence persistence times. The doped parent glasses showed red emission under UV light excitation due to the doping of Eu3+ ions, while the corresponding glass-ceramics showed persistent blue emission corresponding to the presence of Eu2+ in the crystalline environment. The dopant concentration had a strong impact on the sintering/crystallisation kinetics affecting the final glass-ceramic microstructure. The microstructures and morphology of the crystals responsible for the blue emission were observed by scanning electron microscopy-cathodoluminescence. The composition of the crystallised phases and the distribution of rare-earth (RE) ions in the crystals and in the residual glassy phase were determined by X-ray diffraction and energy dispersive X-ray analysis. The emission and persistence of phosphorescence were studied by photoluminescence.

Hybrid Epoxy-Alkyl Sol-Gel Coatings Reinforced with SiO2 Nanoparticles for Corrosion Protection of Anodized AZ31B Mg Alloy.

AZ31B Mg alloys were anodized at different potentials using an alkaline electrolyte. Then, an epoxy-alkyl silane sol reinforced with SiO2 nanoparticles was prepared by sol-gel and deposited on top of the optimized anodic layers. 1-Methyl imidazole was added to the sol to promote a partial epoxy ring aperture and improve the condensation degree of the inorganic network. The results showed the curing temperature affects the inorganic polycondensation of the organic-inorganic network; this effect was analyzed by 29Si and 13C solid-state NMR spectroscopy. Electrochemical impedance spectroscopy in 3.5 wt% NaCl solution revealed that the corrosion resistance is enhanced by the anodized process obtained for Mg alloy anodized at 100 V/2 min. However, a quick deterioration of the oxide film with immersion time was evident, showing a reduction of the protection efficiency (ηE%) of 76.5% after 16 h/immersion. The deposition of an epoxy-alkyl coating improved the ηE% up to 98.6% after 72 h/immersion. The proposed hybrid coating used for post-sealing the porous anodized Mg alloy looks like a good alternative protective barrier to control the corrosion process of Mg alloys. A suitable compromise between cross-linking network and curing temperature is necessary to obtain a good barrier coating.

Non-Linear Optical Properties of Er3+-Yb3+-Doped NaGdF4 Nanostructured Glass-Ceramics.

Transparent oxyfluoride glass-ceramics containing NaGdF4 nanocrystals were prepared by melt-quenching and doped with Er3+ (0.5 mol%) and different amounts of Yb3+ (0-2 mol%). The selected dopant concentration the crystallization thermal treatments were chosen to obtain the most efficient visible up-conversion emissions, together with near infrared emissions. The crystal size increased with dopant content and treatment time. NaGdF4 NCs with a size ranging 9-30 nm were obtained after heat treatments at Tg + 20-80 °C as confirmed by X-ray diffraction and high-resolution transmission electron microscopy. Energy dispersive X-ray analysis shows the incorporation of rare earth ions into the NaGdF4 nanocrystals. Near-infrared emission spectra, together with the up-conversion emissions were measured. The optical characterization of the glass-ceramics clearly shows that Er3+ and Yb3+ ions are incorporated in the crystalline phase. Moreover, visible up-conversion emissions could be tuned by controlling the nanocrystals size through appropriated heat treatment, making possible a correlation between structural and optical properties.

Hybrid Sol-Gel Silica Coatings Containing Graphene Nanosheets for Improving the Corrosion Protection of AA2024-T3.

In the present work, nanostructured graphene nanosheets were added to hybrid silica sols and deposited on aluminium alloy A2024-T3 to study the effect on the corrosion behaviour. Sols were prepared using tetraethyl-orthosilicate (TEOS), 3-glycidoxypropyl-trimethoxysilane (GPTMS) and a colloidal silica suspension (LUDOX) as silica precursors with adding chemically modified graphene nanosheets (GN-chem). The graphene nanosheets were modified through a straightforward and simple hydrothermal approach and then, dispersed into a silica sol (SiO2/GN-chem). ATR-FTIR was used to optimize the silica sol-gel synthesis and to confirm the cross-linking of the silica network. The corrosion behaviour of the SiO2/GN-chem coatings was also analysed by electrochemical measurement (potentiodynamic polarization) in 0.05 M NaCl solution. The results showed that the incorporation of modified graphene nanosheets into hybrid silica sol-gel coatings affected the corrosion properties of the substrates. An improvement in the corrosion resistance was observed likely due to the enhanced barrier property and hydrophobic behaviour obtained by incorporation of GN-chem and colloidal silica nanoparticles.

Familia y proceso de reintegración de excombatientes en el conflicto armado colombiano: estado del arte 2010-2018 / Family and reintegration process in the Colombian armed conflict: state of the art 2000-2018

En el marco del conflicto armado la producción de conocimiento sobre Desmovilización, Desarme y Reintegración reconoce a la familia como un factor fundamental en el proceso de reintegración, tal y cómo se encuentra al interior de diversas producciones, aunque las mismas no hayan sido lo suficientemente difundidas. En este artículo, analizamos la producción académica en torno a la familia durante el proceso de reintegración, teniendo como contexto la desmovilización de personas de Grupos Armados Ilegales (GAI) en Colombia. Construimos un estado del arte con artículos y tesis durante el periodo 2010-2018 publicadas revistas indexadas y centros de investigación universitarios. Entre los resultados se destaca la importancia de la familia como factor de riesgo y protección en el proceso de reintegración, se identifican los ajustes en las dinámicas familiares antes, durante y después de la vinculación al grupo armado y se exploran perspectivas de género en las transformaciones de sujetos y familias

In the framework of the armed conflict the production of knowledge on Demobilization, Dis-armament and Reintegration recognizes the family as a fundamental factor in the process of reintegration, as it is found within various productions, even though these have not been sufficiently disseminated. In this article, we analyze the academic production around the family during the reintegration process, taking as a context the demobilization of people from Illegal Armed Groups (IAG) in Colombia. We build a state of the art with articles and theses during the period 2010-2018 published in indexed journals and university research centers. Among the results, we highlight the importance of the family as a risk and protection factor in the reintegration process, we identify the adjustments in family dynamics before, during and after joining the armed group, and we explore gender perspectives in the transformations of subjects and families

Conclusiones del I Foro Nacional de jefes de Estudio, técnicos docentes y responsables autonómicos de Formación Sanitaria Especializada y del II Congreso Nacional de Formación Sanitaria Especializada (XIV Encuentro Nacional de tutores y jefes de Estudio). SEFSE-AREDA 2017, Madrid 28-29 de septiembre / Conclusions of I National Forum of heads, technicians and regional responsibles of Specialized Training and of the 2th National Congress of the Spanish Society for Postgraduate Medical Education (14th National Meeting of Heads and Tutors of Specialized Training). SEFSE-AREDA 2017, Madrid, September 28-29

Una buena gestión y calidad de la Formación Sanitaria Especializada (FSE) exige el compromiso explícito de los responsables de las CCAA y de los centros sanitarios. Esto implica la acreditación y reconocimiento de tutores, desarrollar el marco normativo que establece el RD 183/2008 (a los nueve años de su publicación sólo Cataluña, Canarias, Castilla y León, Extremadura, La Rioja y el País Vasco, lo han hecho), una mención explícita de la FSE en los planes estratégicos de las organizaciones sanitarias y en los contratos-programa con las unidades docentes y una participación activa de los jefes de estudio en los consejos de dirección de los centros. Por parte del Ministerio de Sanidad, es preciso agilizar la acreditación de las nuevas unidades docentes y abordar, junto con las CCAA, los problemas de financiación del proyecto de troncalidad y la organización de las unidades docentes troncales. Respecto al sentido de la formación, esta se ha de centrar en la seguridad del paciente, aquí la simulación es una metodología formativa idónea, y en la humanización, con una práctica de la medicina bajo un modelo deliberativo, siendo los formadores ejemplo para los que aprenden

The commitment of the heads of the Autonomous Communities and the health centers is key to a good management and the quality of the Specialized Healthcare Training (SHT). This implies the accreditation and recognition of tutors, developing the regulatory framework established by Royal Decree 183/2008 (nine years after its publication, only Catalonia, the Canary Islands, Castilla y León, Extremadura, La Rioja and the Basque Country have done so), an explicit mention of the SHT in the strategic plans of the health organizations and an active participation of the heads of SHT in the boards of directors. On the part of the Ministry of Health, it is necessary to speed up the accreditation process of new teaching units and, together with the Autonomous Communities, and address the financing problems of the core curriculum project and the organization of the core teaching units. Regarding the sense of training, this has to focus on safety patient, here the simulation is a suitable training methodology, and in the humanization, with a practice of medicine under a deliberative model, being the trainers an example for those who learn

Transparent Sol-Gel Oxyfluoride Glass-Ceramics with High Crystalline Fraction and Study of RE Incorporation.

Transparent oxyfluoride glass-ceramic films and self-supported layers with composition 80SiO2-20LaF3 doped with Er3+ have been successfully synthesized by sol-gel process for the first time. Crack-free films and self-supported layer with a maximum thickness up to 1.4 µm were obtained after heat treatment at the low temperature of 550 °C for 1 min, resulting in a LaF3 crystal fraction of 18 wt%, as confirmed by quantitative Rietveld refinement. This is the highest value reported up to now for transparent oxyfluoride glass-ceramics prepared by sol-gel. This work provides a new synthesis strategy and opens the way to a wide range of potential applications of oxyfluoride glass-ceramics. The characterization by a wide range of techniques revealed the homogeneous precipitation of LaF3 nanocrystals into the glass matrix. X-ray absorption spectroscopy and electron paramagnetic resonance confirmed that the Er3+ ions are preferentially embedded in the low phonon-energy LaF3 nanocrystals. Moreover, photoluminescence (PL) measurements confirmed the incorporation of dopants in the LaF3 nanocrystals. The effective concentration of rare-earth ions in the LaF3 nanocrystals is also estimated by X-ray absorption spectroscopy.

Laser-Assisted Synthesis of Cu-Al-Ni Shape Memory Alloys: Effect of Inert Gas Pressure and Ni Content.

The paper explores the applicability of laser-assisted synthesis for producing high density Cu-Al-Ni alloys with shape memory characteristics, that could be further developed towards a method of additive manufacturing of large size Cu-based shape memory alloys (SMA). The manufacturing approach consists in laser melting of elemental powder mixture in a controlled atmosphere of varying relative pressure of protective argon gas, producing alloys of 14.2 wt.% Al and Ni content varying between 2 and 4 wt.%. All the fabricated alloys are found to have attained martensitic microstructures capable of SMA specific phase transformations in the temperature range from 85 to 192 °C. Both gas pressure and content of Ni are found to affect the specific transformation temperatures, transformation enthalpies, and mechanical properties. In particular, increasing gas pressure suppresses the austenite to martensite transformation reducing microhardness. In conclusion, the selective laser melting (SLM) employed in this work is shown capable of producing high density Cu-Al-Ni SMA (porosity ≈ 2%).

Eficacia de una intervención educativa para mejorar el conocimiento de las/os enfermeras/os sobre el sondaje gástrico en pediatría / Effectiveness of an educational intervention to improve nurses' knowledge on pediatric nasogastric intubation

Objetivo. Eficacia de una intervención educativa para mejorar el conocimiento de las/os enfermeras/os sobre el sondaje gástrico en pediatría. Métodos. Estudio multicéntrico cuasi experimental pre- y postest mediante intervención educativa teórica basada en la evidencia bibliográfica y la evaluación de su eficacia a los 4 meses. Resultados. Cuestionarios entregados: 1019. Válidos: 557 (54,66 %) pretest, 246 (24,14 %) postest. Las respuestas pre- y postest fueron que el riesgo implícito que conllevaba siempre el procedimiento había sido percibido por el 53,2 % y aumentó al 70,7 % (p < 0,001). El 4,3 % elegía el tamaño de la sonda gástrica (SG) mediante tablas y se elevó al 24,6 % (p < 0,001). La longitud de la SG por introducir medida mediante el método nariz-oreja-distancia media xifoides-ombligo (nose-ear-mid-umbilicus; NEMU, por sus siglas en inglés) ascendió del 34,2 % al 81,3 % (p < 0,001). La comprobación de la ubicación de la SG previa a su uso pasó del 73,1 % al 86,5 % (p < 0,001). La comprobación de los cinco correctos (paciente, medicamento, dosis, vía y hora) previa a la utilización de la SG aumentó del 85,6 % al 91 %. Como métodos de comprobación, mejoró la percepción de inseguridad de la auscultación del 11,7 % al 31,1 % (p < 0,001), y disminuyó su uso del 95,1 % al 81,6 %. Creció la percepción de seguridad de la medición del pH gástrico del 71,3 % al 91,1 % (p < 0,001), y aumentó su uso del 7,6 % al 54,3 % (p < 0,001). Conclusiones. La intervención educativa resultó eficaz para incrementar el conocimiento de enfermería sobre el sondaje gástrico pediátrico.

Objective. To establish the effectiveness of an educational intervention to improve nurses' knowledge on pediatric nasogastric intubation. Methods. Multicenter, quasi-experimental, pre- and post-test study using a theoretical educational intervention based on bibliographic evidence and assessment of its effectiveness after 4 months. Results. Delivered questionnaires: 1019. Valid questionnaires: 557 (54.66 %) pre-test and 246 (24.14 %) post-test. Pre- and post-test answers indicated that the implied risk always entailed by the procedure had been perceived by 53.2 % and then increased to 70.7 % (p < 0.001). Nasogastric (NG) tube size was chosen using tables by 4.3 % of participants, and increased to 24.6 % (p < 0.001). The length of NG tube to be inserted as measured by the nose-ear-midumbilicus distance (NEMU) method increased from 34.2 % to 81.3 % (p < 0.001). Confirmation of NG tube placement prior to use increased from 73.1 % to 86.5 % (p < 0.001). Confirmation of the five rights (patient, drug, dosage, route, and timing) prior to NG tube use increased from 85.6 % to 91 %. In relation to confirmation methods, the perception that auscultation was unsafe improved from 11.7 % to 31.1 % (p < 0.001), and its use reduced from 95.1 % to 81.6 %. The perception that the measurement of gastric pH was safe increased from 71.3 % to 91.1 % (p < 0.001), and its use rose from 7.6 % to 54.3 % (p < 0.001). Conclusions. The educational intervention was effective to increase nurses' knowledge on pediatric nasogastric intubation.

Effectiveness of an educational intervention to improve nurses' knowledge on pediatric nasogastric intubation. / Eficacia de una intervención educativa para mejorar el conocimiento de las/os enfermeras/os sobre el sondaje gástrico en pediatría.

OBJETIVE: To establish the effectiveness of an educational intervention to improve nurses' knowledge on pediatric nasogastric intubation. METHODS: Multicenter, quasi-experimental, pre- and post-test study using a theoretical educational intervention based on bibliographic evidence and assessment of its effectiveness after 4 months. RESULTS: Delivered questionnaires: 1019. Valid questionnaires: 557 (54.66 %) pre-test and 246 (24.14 %) post-test. Pre- and post-test answers indicated that the implied risk always entailed by the procedure had been perceived by 53.2 % and then increased to 70.7 % (p < 0.001). Nasogastric (NG) tube size was chosen using tables by 4.3 % of participants, and increased to 24.6 % (p < 0.001). The length of NG tube to be inserted as measured by the nose-ear-midumbilicus distance (NEMU) method increased from 34.2 % to 81.3 % (p < 0.001). Confirmation of NG tube placement prior to use increased from 73.1 % to 86.5 % (p < 0.001). Confirmation of the five rights (patient, drug, dosage, route, and timing) prior to NG tube use increased from 85.6 % to 91 %. In relation to confirmation methods, the perception that auscultation was unsafe improved from 11.7 % to 31.1 % (p < 0.001), and its use reduced from 95.1 % to 81.6 %. The perception that the measurement of gastric pH was safe increased from 71.3 % to 91.1 % (p < 0.001), and its use rose from 7.6 % to 54.3 % (p < 0.001). CONCLUSIONS: The educational intervention was effective to increase nurses' knowledge on pediatric nasogastric intubation.

Objetivo. Eficacia de una intervención educativa para mejorar el conocimiento de las/os enfermeras/os sobre el sondaje gástrico en pediatría. Métodos. Estudio multicéntrico cuasi experimental pre- y postest mediante intervención educativa teórica basada en la evidencia bibliográfica y la evaluación de su eficacia a los 4 meses. Resultados. Cuestionarios entregados: 1019. Válidos: 557 (54,66 %) pretest, 246 (24,14 %) postest. Las respuestas pre- y postest fueron que el riesgo implícito que conllevaba siempre el procedimiento había sido percibido por el 53,2 % y aumentó al 70,7 % (p < 0,001). El 4,3 % elegía el tamaño de la sonda gástrica (SG) mediante tablas y se elevó al 24,6 % (p < 0,001). La longitud de la SG por introducir medida mediante el método nariz-oreja-distancia media xifoides-ombligo (nose-ear-mid-umbilicus; NEMU, por sus siglas en inglés) ascendió del 34,2 % al 81,3 % (p < 0,001). La comprobación de la ubicación de la SG previa a su uso pasó del 73,1 % al 86,5 % (p < 0,001). La comprobación de los cinco correctos (paciente, medicamento, dosis, vía y hora) previa a la utilización de la SG aumentó del 85,6 % al 91 %. Como métodos de comprobación, mejoró la percepción de inseguridad de la auscultación del 11,7 % al 31,1 % (p < 0,001), y disminuyó su uso del 95,1 % al 81,6 %. Creció la percepción de seguridad de la medición del pH gástrico del 71,3 % al 91,1 % (p < 0,001), y aumentó su uso del 7,6 % al 54,3 % (p < 0,001). Conclusiones. La intervención educativa resultó eficaz para incrementar el conocimiento de enfermería sobre el sondaje gástrico pediátrico.

Parental eating disorders symptoms in different clinical diagnoses / Síntomas parentales de trastornos de la conducta alimentaria en distintos diagnósticos clínicos

BACKGROUND: The influence of parents can be an important variable in the development of eating disorders (EDs). However, few studies exist which simultaneously assess parents and their children, especially in different clinical groups. METHODS: Our study examines the differences in ED symptoms as measured on the Eating Disorder Inventory (EDI), in parents and their children as patients with anorexia nervosa (AN), bulimia nervosa (BN), unspecified eating disorder (UED) and a control group (CG). RESULTS: The mothers in the clinical group scored higher in ineffectiveness, interoceptive awareness, maturity fears, social insecurity and impulse regulation than the mothers in the control group. The patients' fathers scored higher on impulse regulation than those in the control group. In addition, the fathers of patients in the BN group scored higher than the fathers of patients in the UED group in body dissatisfaction. They also scored higher in impulse regulation than the fathers of patients with AN. Ineffectiveness and impulse regulation were the variables in which patients' scores were most similar to their parents. CONCLUSIONS: These results show the presence of ED psychological variables in both parents, not just mothers. Prevention and intervention activities for eating disorders must be designed to also give an active role to the father

ANTECEDENTES: la influencia parental puede ser un importante factor en el desarrollo de los trastornos de la conducta alimentaria (TCA). Sin embargo, existen muy pocos estudios que evalúen de forma simultánea a ambos progenitores (padre y madre), así como a sus hijos y, de forma específica, que comparen grupos con diferentes diagnósticos clínicos. MÉTODO: este estudio analiza diferencias en síntomas de TCA medidos mediante el Eating Disorder Inventory 2 (EDI-2), tanto en padres como madres y sus respectivos hijos. Éstos se dividieron en: pacientes con diagnóstico de anorexia nerviosa (AN), bulimia nerviosa (BN), trastorno de la conducta alimentaria no especificado (TCANE) y grupo control (GC). RESULTADOS: las madres de los grupos clínicos puntuaron más alto en ineficacia, consciencia introceptiva, miedo a la madurez, inseguridad social e impulsividad en comparación con las madres del grupo control. Ineficacia e impulsividad fueron las variables con mayor coincidencia entre pacientes y sus progenitores. CONCLUSIONES: estos resultados ponen de manifiesto la presencia de variables de funcionamiento psicológico que podrían estar asociadas con TCA también en padres de pacientes. De esta forma, las actividades de intervención en estos pacientes deberían diseñarse para otorgar un papel activo no solo a las madres sino también a sus padres

Parental eating disorders symptoms in different clinical diagnoses.

BACKGROUND: The influence of parents can be an important variable in the development of eating disorders (EDs). However, few studies exist which simultaneously assess parents and their children, especially in different clinical groups. METHODS: Our study examines the differences in ED symptoms as measured on the Eating Disorder Inventory (EDI), in parents and their children as patients with anorexia nervosa (AN), bulimia nervosa (BN), unspecified eating disorder (UED) and a control group (CG). RESULTS: The mothers in the clinical group scored higher in ineffectiveness, interoceptive awareness, maturity fears, social insecurity and impulse regulation than the mothers in the control group. The patients’ fathers scored higher on impulse regulation than those in the control group. In addition, the fathers of patients in the BN group scored higher than the fathers of patients in the UED group in body dissatisfaction. They also scored higher in impulse regulation than the fathers of patients with AN. Ineffectiveness and impulse regulation were the variables in which patients’ scores were most similar to their parents. CONCLUSIONS: These results show the presence of ED psychological variables in both parents, not just mothers. Prevention and intervention activities for eating disorders must be designed to also give an active role to the father.

Transparent Glass-Ceramics Produced by Sol-Gel: A Suitable Alternative for Photonic Materials.

Transparent glass-ceramics have shown interesting optical properties for several photonic applications. In particular, compositions based on oxide glass matrices with fluoride crystals embedded inside, known as oxyfluoride glass-ceramics, have gained increasing interest in the last few decades. Melt-quenching is still the most used method to prepare these materials but sol-gel has been indicated as a suitable alternative. Many papers have been published since the end of the 1990s, when these materials were prepared by sol-gel for the first time, thus a review of the achievements obtained so far is necessary. In the first part of this paper, a review of transparent sol-gel glass-ceramics is made focusing mainly on oxyfluoride compositions. Many interesting optical results have been obtained but very little innovation of synthesis and processing is found with respect to pioneering papers published 20 years ago. In the second part we describe the improvements in synthesis and processing obtained by the authors during the last five years. The main achievements are the preparation of oxyfluoride glass-ceramics with a much higher fluoride crystal fraction, at least double that reported up to now, and the first synthesis of NaGdF4 glass-ceramics. Moreover, a new SiO2 precursor was introduced in the synthesis, allowing for a reduction in the treatment temperature and favoring hydroxyl group removal. Interesting optical properties demonstrated the incorporation of dopant ions in the fluoride crystals, thus obtaining crystal-like spectra along with higher efficiencies with respect to xerogels, and hence demonstrating that these materials are a suitable alternative for photonic applications.

Analysis of the familiar psychopathology as a therapeutic tool / Análisis de la psicopatología familiar como herramienta terapéutica

The objective of this study is to find out the degree of psychopathology which patients with an eating disorder present (ED) and to which degree this is accompanied by the presence of psychopathology in mothers and fathers of patients. Three groups of patients with Anorexia Nervosa (AN), Bulimia Nervosa (BN), and eating disorders not otherwise specified (EDNOS) and a control group were selected. Each group had 30 participants (and mothers and fathers). A socio-demographic questionnaire and the SCL-90-R were applied. This scale measured nine dimensions of psychopathology in patients, mothers and fathers. An ANOVA of partially repeated measures with two factors was applied to each dimension of SCL- 90-R. Multiple comparisons between groups within each of the repeated measures were carried out with Sidak test. Patients in three clinical groups obtained significant differences in all psychopathological variables compared with the control group, except in phobic anxiety. These clinical results were accompanied by some degree of psychopathology in mothers but not fathers. The presence of high levels of psychopathology in the three groups of patients and mothers has therapeutic implications that indicate the need for psychological intervention in patients and their mothers (AU)

El objetivo de este estudio es averiguar el grado de psicopatología que presentan los pacientes con un Trastorno de la Conducta Alimentaria (TCA) y en qué grado está acompañado por la presencia de psicopatología en madres y padres de los pacientes. Se seleccionaron tres grupos de 30 pacientes cada uno con Anorexia Nerviosa, Bulimia Nerviosa y TCA No especificado y un grupo control (y sus madres y padres). Se aplicó un cuestionario socio-demográfico y la escala SCL-90-R que mide nueve dimensiones de psicopatología de pacientes, madres y padres, en los cuatro grupos. El análisis de datos se realizó con una ANOVA de dos factores con medidas parcialmente repetidas en cada subescala de la SCL-90-R. Las comparaciones múltiples entre los grupos dentro de cada medida repetida se realizaron con la prueba de Sidak. Los pacientes de los tres grupos clínicos obtuvieron diferencias significativas en todas las variables psicopatológicas frente al grupo control, menos en ansiedad fóbica. Este cuadro clínico fue acompañado por cierto grado de psicopatología de las madres pero no de los padres. La presencia de altos niveles de psicopatología en los tres grupos de pacientes y en las madres tiene implicaciones terapéuticas que marcan la necesidad de la intervención psicológica en las pacientes y en sus madres (AU)

Photocatalytic and biocidal activities of novel coating systems of mesoporous and dense TiO2-anatase containing silver nanoparticles.

Here we describe the development of novel nanostructured coating systems with improved photocatalytic and antibacterial activities. These systems comprise a layer of SiO2 followed by a layer of mesoporous or dense TiO2-anatase, and doping with silver nanoparticles (Ag NPs). The coatings were synthesized via a sol-gel technique by combining colloidal Ag NPs with TiO2 and SiO2 sols. The photocatalytic activity was studied through methyl orange decomposition under UV light. Results showed a great increase of photocatalytic activity by Ag NPs doping. The most active photocatalyst corresponded to the Ag-SiO2/TiO2 mesoporous system, associated with the porosity of the coatings and with the decrease of e-h recombination for the presence of Ag NPs. All the TiO2 coatings showed a strong bactericidal activity against planktonic forms of Gram-negative (enterohemorrhagic Escherichia coli) and Gram-positive (Listeria monocytogenes) pathogens, as well as a strong germicidal effect against deadly spores of human gas gangrene- and anthrax-producing bacteria (Clostridium perfringens and Bacillus anthracis, respectively). The bactericidal and sporocidal activity was improved by doping the coatings with Ag NPs, even more when nanoparticles were in the outer layer of TiO2, because they are more accessible to the environment. The mechanisms responsible for the increase of photocatalytic and bactericidal behaviors related to Ag NP doping were studied by spectroscopic ellipsometry, UV-vis spectroscopy, photoluminescence and anodic stripping voltammetry. It was found that the separation of the electron-hole pair contributed to the enhancement of photocatalysis, whereas the effect of the local electric field reinforcement was probably present. A possible involvement of a decrease of band-gap energy and dispersion by silver nanoparticles is ruled out. bactericidal efficacy was increased by Ag(+) ion release. Overall, the results included in this article show that the architecture of the films may tune photocatalytic and bactericidal properties.

Electrochemical characterization of AISI 316L stainless steel in contact with simulated body fluid under infection conditions.

Titanium and cobalt alloys, as well as some stainless steels, are among the most frequently used materials in orthopaedic surgery. In industrialized countries, stainless steel devices are used only for temporary implants due to their lower corrosion resistance in physiologic media when compared to other alloys. However, due to economical reasons, the use of stainless steel alloys for permanent implants is very common in developing countries. The implantation of foreign bodies is sometimes necessary in the modern medical practice. However, the complex interactions between the host and the can implant weaken the local immune system, increasing the risk of infections. Therefore, it is necessary to further study these materials as well as the characteristics of the superficial film formed in physiologic media in infection conditions in order to control their potential toxicity due to the release of metallic ions in the human body. This work presents a study of the superficial composition and the corrosion resistance of AISI 316L stainless steel and the influence of its main alloying elements when they are exposed to an acidic solution that simulates the change of pH that occurs when an infection develops. Aerated simulated body fluid (SBF) was employed as working solution at 37 degrees C. The pH was adjusted to 7.25 and 4 in order to reproduce normal body and disease state respectively. Corrosion resistance was measured by means of electrochemical impedance spectroscopy (EIS) and anodic polarization curves.