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Abstract Background Niemann–Pick disease type C (NP-C) is a rare genetic lysosomal lipid storage disorder characterized by progressive neurological impairment. Early diagnosis is critical for initiating treatment with miglustat, which can decelerate disease progression. In this study, we evaluated a cohort of 22 NP-C patients who underwent MRI, [18F]FDG PET, and clinical assessment at baseline. We performed a cross-sectional and longitudinal imaging study evaluating the role of [18F]FDG PET as an adjunct diagnostic tool for NP-C alongside MRI, the current neuroimaging standard. Results Group-level MRI analysis identified significant cerebellar and thalamic atrophy (d = 1.56, p

Objectives Generalized pustular psoriasis (GPP) is a rare, life-threatening skin inflammatory disorder. This study aimed to describe the disease course, treatment strategies, and healthcare utilization among patients with GPP in Portugal.Methods This multicentric, observational, retrospective study included consecutive adult patients with GPP undergoing a dermatology evaluation in different reporting institutions by experienced dermatologists between 2002 and 2023.Results A total of 59 patients were assessed. Most of the cohort had a previous history of plaque psoriasis (71%) and 83% presented at least one comorbidity. At the initial encounter, 64% of the cohort needed hospitalization. Systemic involvement was common, including fever (37%), and elevated white blood cell count and erythrocyte sedimentation rate/C-reactive protein (49%). Nearly, 73% of patients initiated systemic drugs, and 70% had to discontinue the first treatment. During the study, 98% of patients experienced at least one flare. At the last visit, 3.4% of patients had died, and 71.2% exhibited signs of active disease despite undergoing treatment.Conclusions Our study demonstrates that GPP is a chronic, debilitating condition associated with systemic involvement, frequent flares, and hospitalizations, despite receiving multiple systemic treatments. Improved disease awareness and new treatments are needed to improve patient care and decrease the burden of the disease.

Abstract This study aimed to investigate if the duration of breastfeeding and the method at initiation of complementary feeding affect eating behaviour in children aged 3−6 years. This is a cross‐sectional analysis from the Childhood Obesity Risk Assessment Longitudinal Study project, an ongoing longitudinal cohort study that aims to identify childhood obesity risk factors in Spanish children. A total of 1215 children aged 3−6 years were included. Breastfeeding duration and the method of initiation of complementary feeding [baby‐led weaning (BLW), traditional/spoon or mixed method] were evaluated. Eating behaviour at 3−6 years was assessed with the Child Eating Behaviour Questionnaire. Generalized linear models were fitted to assess the association between the aforementioned exposures and eating behaviour. Children breastfed for ≥4 months were less likely to be fussy eaters at 3−6 years compared to those breastfed for

Fracture risk assessment in patients with chronic kidney disease (CKD) has been included in the CKD-MBD (''Chronic Kidney Disease-Mineral and Bone Disorders'') complex in international and national nephrology guidelines, suggesting for the first time the assessment of bone mineral density (BMD) if the results can influence therapeutic decision-making. However, there is very little information on actual clinical practice in this population. The main objective of the ERCOS (ERC-Osteoporosis) study is to describe the profile of patients with CKD G3-5D with osteoporosis (OP) and/or fragility fractures treated in specialized nephrology, rheumatology and internal medicine clinics in Spain. Fifteen centers participated and 162 patients (mostly women [71.2%] postmenopausal [98.3%]) with a median age of 77 years were included. Mean estimated glomerular filtration rate (eGFR) was 36 mL/min/1.73 m2 and 38% of the included patients were on dialysis. We highlight the high frequency of prevalent fragility fractures [37.7%), mainly vertebral (52.5%) and hip (24.6%)], the disproportionate history of patients with glomerular disease compared to purely nephrological series (corticosteroids) and undertreatment for fracture prevention, especially in nephrology consultations. This study is an immediate call to action with the dissemination of the new, more proactive, clinical guidelines, and underlines the need to standardize a coordinated and multidisciplinary care/therapeutic approach to these patients in an efficient way to avoid current discrepancies and therapeutic nihilism. Resumen: La valoración del riesgo de fractura del paciente con enfermedad renal crónica (ERC) ha sido incluida en el complejo CKD-MBD («Chronic Kidney Disease-Mineral and Bone Disorders») en guías nefrológicas internacionales y nacionales, sugiriéndose por primera vez la evaluación de la densidad mineral ósea (DMO) si los resultados pueden condicionar la toma de decisiones terapéuticas. Sin embargo, existe muy poca información en práctica clínica real en esta población. El objetivo principal del estudio ERCOS (ERC-Osteoporosis) es describir el perfil de los pacientes con ERC G 3-5 D con osteoporosis (OP) y/o fracturas por fragilidad atendidos en consultas especializadas de nefrología, reumatología y medicina interna en España. Participaron 15 centros y se incluyeron 162 pacientes (siendo en su mayoría mujeres [71,2%] postmenopáusicas [98,3%]) con una mediana de edad de 77 años. La mediana del filtrado glomerular estimado (FGe) fue de 36 mL/min/1,73m2 y 38% de pacientes incluidos estaban en diálisis. Destacamos la elevada frecuencia de fracturas por fragilidad prevalentes [37,7%), principalmente vertebrales (52,5%) y de cadera (24,6%)], el antecedente desproporcionado de pacientes con patología glomerular en comparación a series puramente nefrológicas (corticoides) y el infratratamiento para la prevención de fracturas, fundamentalmente en consultas nefrológicas. Este estudio supone una inmediata llamada a la acción con la difusión de las nuevas guías clínicas, más proactivas, y subraya la necesidad de homogeneizar el enfoque asistencial/terapéutico multidisciplinar coordinado de estos pacientes de un modo eficiente para evitar las actuales discrepancias y el nihilismo terapéutico.

The Eastern South Pacific Right Whale (SRW) (Eubalaena australis) population has gained interest due to its Critically Endangered conservation status. So far, this population has been confirmed only along the coasts of Chile (18°20'S to 56°30'S) and from southern to central Peru (17°38'S to 12°11'S). Recent records have extended the species' known range, highlighting its geographic distribution, now reaching 1500 km north. Here, we report six recent records, consisting of five sightings and one stranding, that expand the documented range to northern Ecuador (0.6°N). The northern extension of the population may be associated with the unusual three-year-long cold phase (La Niña) of the El Niño Southern Oscillation (ENSO) in the eastern South Pacific, population expansion, movement and re-distribution of the species, increased monitoring effort, or a combination of these factors. These observations raise hope for the Critically Endangered SRW population, as the occurrence of mother-calf pairs may indicate a potential for population recovery. Nevertheless, these findings intensify concerns for what is still the least abundant SRW population, underscoring the urgency for more targeted research and conservation measures.

Current efforts in stomach-related drug design focus on improving drug bioavailability within the gastric region. Bacterial nanocellulose (BNC) has been established as a suitable material for drug delivery systems; however, it lacks adhesion to the gastric environment. This limitation can be addressed by leveraging the mucoadhesive properties of low molecular weight chitosan (LMWC). Therefore, we aimed to develop mucoadhesive capsules constructed from BNC coated with crosslinked LMWC, intended for targeted drug delivery in the gastric region. The capsules were characterized using scanning electron microscopy, infrared spectroscopy, thermogravimetric analysis, and mucoadhesion assessments. Under acidic conditions, crosslinked chitosan exhibited enhanced swelling relative to neutral conditions. The coating of chitosan onto the BNC fibrillar network of the capsules resulted in the superimposition of vibration bands and enhanced thermal stability. Furthermore, the capsules exhibited significant mucoadhesive properties in the gastric environment, with an attachment force measuring 89.151 ± 6.226 mN. To validate the efficacy of the system, we utilized antioxidant turmeric extract (TE) as a bioactive compound with chemopreventive potential against stomach cancer. TE was adsorbed onto BNC in a reversible multilayer system, enabling controlled adsorption and desorption. These findings highlight the significance of developing mucoadhesive capsules as a tailored drug delivery system for gastric conditions, particularly in the context of treating stomach diseases as cancer.

La polifarmacia en el adulto mayor es de interés para las autoridades sanitarias porque predispone a interacciones farmacológicas y efectos secundarios nocivos que pueden causar la muerte. El objetivo de esta revisión fue identificar las prescripciones medicamentosas potencialmente inapropiadas en adultos mayores, así como evaluar la calidad metodológica de los estudios disponibles. Se realizó una revisión sistemática en las bases de datos Pubmed, Dialnet, Scielo, Scient direct, Redalyc, Ovid. La ecuación de búsqueda fue: prescripción inadecuada AND medicamentos AND adulto mayor y sus equivalentes en inglés y portugués. Se encontraron, en la búsqueda inicial, 20.296 artículos y fueron incluidos finalmente en la revisión 42 artículos. Se encontró que el 50% de los artículos fueron de diseño transversal; el rango de prevalencia de MPI fue de 19,8% a 98,2%, detectados por los criterios de Beer, STOPP, START, PRISCUS, ACOVE, FROTA o MAI. Los MPI mayormente identificados fueron las benzodiazepinas y los factores que se asociaron fueron el número de medicamentos, la edad, el sexo y la presencia de comorbilidades.

BackgroundIn recent years, there has been increasing interest in studying differences in recipient sex in renal disease treatment, access to renal replacement therapy, and subsequent outcomes. Our aim was to find out whether there are differences in outcomes after renal transplantation between female and male kidney transplant recipients in our series, particularly in adults under 60 years of age during long-term follow-up.MethodsThis was a retrospective study of our kidney transplant series (n = 1,101) to compare graft survival depending on the sex of the recipient in the entire series and patients < 60 years of age (n = 687) during long-term follow-up.ResultsWe observed no association between recipient sex and graft survival throughout the series, regardless of recipient sex. However, adult female recipients under 60 years of age had lower graft survival than male recipients (p = 0.040). Pre-transplant sensitization (HR 2.438, p = 0.002) and donor age (HR: 1.021, p = 0.017) were the independent variables associated with graft failure.ConclusionFemale recipients younger than 60 years of age had lower graft survival than male recipients, although there were no gender differences in graft or patient survival in the overall study population. Recipient sex per se was not related to graft failure, but the greater immunological risk in women and more frequent use of expanded criteria donors in female recipients under 60 years of age were the main factors related to their poorer graft survival. Further studies and new strategies are needed to identify these differences and develop the best approach to address them.

Es el primer estudio de seguimiento de cohorte que se realiza en la Facultad de Odontología de la Universidad de Costa Rica (FOUCR). El objetivo es determinar la eficiencia terminal, el rezago y la deserción en la cohorte del 2010 en la FOUCR, para desarrollar estrategias tendientes a mejorar la gestión académica. Se realizó un censo de la cohorte del 2010 desde marzo del 2010 a marzo del 2020. Los datos se recopilaron del Sistema de Aplicaciones Estudiantiles (SAE), los expedientes físicos y las listas de estudiantes graduados desde el 2015 hasta marzo del 2020. El criterio de inclusión comprendió todos los expedientes de los estudiantes que fueron admitidos y consolidaron su matrícula en Odontología de la UCR, en el año 2010. La cohorte es el conjunto de estudiantes que iniciaron sus estudios en un mismo año y semestre académico, cumplen con las mismas medidas de selección y cursan el mismo plan de estudios, se siguen en el tiempo hasta que presentan el evento en estudio: graduación, deserción o hasta la fecha de culminación de la investigación. Los datos se analizaron con estadística descriptiva. Los resultados señalan que la eficiencia terminal es de 8,5 %, un 50% se ha graduado con rezago, un 9,5% de los estudiantes permanecen cursando la carrera y el abandono es de 32%. Se recomienda la búsqueda de las causas de estos resultados con el objetivo de mejorar estos indicadores.

After an injury, the limited regenerative capacity of the central nervous system makes the reconnection and functional recovery of the affected nervous tissue almost impossible. To address this problem, biomaterials appear as a promising option for the design of scaffolds that promote and guide this regenerative process. Based on previous seminal works on the ability of regenerated silk fibroin fibers spun through the straining flow spinning (SFS) technique, this study is intended to show that the usage of functionalized SFS fibers allows an enhancement of the guidance ability of the material when compared with the control (nonfunctionalized) fibers. It is shown that the axons of the neurons not only tend to follow the path marked by the fibers, in contrast to the isotropic growth observed on conventional culture plates, but also that this guidance can be further modulated through the biofunctionalization of the material with adhesion peptides. Establishing the guidance ability of these fibers opens the possibility of their use as implants for spinal cord injuries, so that they may represent the core of a therapy that would allow the reconnection of the injured ends of the spinal cord.

OBJECTIVES:. Inhaled L-epinephrine is a known treatment of severe croup and postextubation upper airway obstruction. L-epinephrine can be delivered continuously in the vapor phase, but the indications, safety, and efficacy of this novel practice have yet to be evaluated. Theoretical risks are tachycardia, hypertension, and dysrhythmias. The study objective was to describe patient characteristics and vital sign changes related to continuous vaporized L-epinephrine use in critically ill children with the hypothesis that it can be practically and safely administered to children with subglottic edema and lower airway obstruction. DESIGN:. Retrospective cohort study. SETTING:. PICU and cardiothoracic ICU in a tertiary academic children’s hospital. PATIENTS:. Patients age 0–21 years treated with continuous vaporized L-epinephrine from 2013 to 2019. INTERVENTIONS:. None. MEASUREMENTS AND MAIN RESULTS:. Continuous vaporized L-epinephrine was administered 140 times to 129 subjects via a high-flow nasal oxygen device. The median age was 10.6 months (1.3; interquartile range, 4.8–17.1 mo). The most common indications were lower respiratory tract obstruction (45%), postextubation subglottic edema (31%), and croup (16%). Eighty-eight percent had no escalation of respiratory support within 24 hours of initiation of continuous vaporized L-epinephrine, 5% progressed to require endotracheal intubation, and 3% were reintubated within 24 hours of initiation of continuous vaporized L-epinephrine following an extubation attempt. After starting continuous vaporized L-epinephrine, 85% of subjects had a decrease in heart rate and 80% had a decrease in respiratory rate. Six subjects had an increase in heart rate, and eight had an increase in blood pressure of more than 20% from baseline. These subjects did not receive interventions specific to these vital sign changes, including discontinuation of continuous vaporized L-epinephrine. CONCLUSIONS:. Continuous vaporized L-epinephrine was safely administered to critically ill children with most subjects demonstrating a decrease in heart rate, blood pressure, and respiratory rate.

Resumen: La osteoporosis (OP) y la enfermedad renal crónica (ERC) influyen independientemente en la salud ósea. Numerosos pacientes con ERC presentan una disminución de densidad mineral ósea (DMO), un elevado riesgo de fracturas por fragilidad ósea y un incremento de su morbimortalidad. Con el envejecimiento de la población estos hechos no son dependientes solo de la «osteodistrofia renal» sino también de la OP asociada. Dado que la DMO tiene capacidad predictiva en pacientes con ERC (parte I), ahora analizaremos las implicaciones terapéuticas derivadas. Análisis post hoc de estudios aleatorizados han mostrado que fármacos como alendronato, risedronato, raloxifeno, teriparatida o denosumab tienen una eficacia comparable a la población general en pacientes con una disminución leve-moderada del filtrado glomerular (especialmente ERC-3). Estos estudios tienen limitaciones, pues incluyen mayoritariamente mujeres «sanas», sin diagnóstico conocido de ERC y habitualmente con parámetros normales de laboratorio; sin embargo, también existen datos positivos preliminares en estadios más avanzados (ERC-4) y más limitados en ERC-5D. Por todo ello, al menos en ausencia de alteraciones significativas del metabolismo mineral (i.e., hiperparatiroidismo severo), el beneficio potencial de dichos fármacos debería ser considerado en pacientes que presenten un riesgo de fractura elevado o muy elevado. Es novedad importante que las nuevas guías no condicionan su uso a la práctica de una biopsia ósea previa y que el beneficio/riesgo de estos fármacos podría estar justificado. Sin embargo, debemos considerar que la mayoría de estudios no son consistentes y tienen un bajo grado de evidencia, por lo que la indicación farmacológica (riesgo/beneficio) debe ser individualizada y prudente. Abstract: Osteoporosis (OP) and chronic kidney disease (CKD) both independently affect bone health. A significant number of patients with CKD have decreased bone mineral density (BMD), are at high risk of fragility fractures and have an increased morbidity and mortality risk. With an ageing population, these observations are not only dependent on “renal osteodystrophy” but also on the associated OP. As BMD predicts incident fractures in CKD patients (part I), we now aim to analyse the potential therapeutic consequences. Post-hoc analyses of randomised studies have shown that the efficacy of drugs such as alendronate, risedronate, raloxifene, teriparatide and denosumab is similar to that of the general population in patients with a mild/moderate decline in their glomerular filtration rate (especially CKD-3). These studies have some flaws however, as they included mostly “healthy” women with no known diagnosis of CKD and generally with normal lab test results. Nevertheless, there are also some positive preliminary data in more advanced stages (CKD-4), even though in CKD-5D they are more limited. Therefore, at least in the absence of significant mineral metabolism disorders (i.e. severe hyperparathyroidism), the potential benefit of these drugs should be considered in patients with a high or very high fracture risk. It is an important change that the new guidelines do not make it a requirement to first perform a bone biopsy and that the risk/benefit ratio of these drugs may be justified. However, we must also be aware that most studies are not consistent and the level of evidence is low. Consequently, any pharmacological intervention (risk/benefit) should be prudent and individualised. Palabras clave: Osteoporosis, CKD-MBD, Densidad mineral ósea, Fracturas, ERC, DEXA, Bisfosfonatos, Denosumab, Romosozumab, Keywords: Osteoporosis, CKD-MBD, Bone mineral density, Fractures, CKD, DEXA, Bisphosphonates, Denosumab, Romosozumab

Osteoporosis (OP) and chronic kidney disease (CKD) both independently affect bone health. A significant number of patients with CKD have decreased bone mineral density (BMD), are at high risk of fragility fractures and have an increased morbidity and mortality risk. With an aging population, these observations are not only dependent on “renal osteodystrophy” but also on the associated OP. As BMD predicts incident fractures in CKD patients (part I), we now aim to analyze the potential therapeutic consequences. Post hoc analyses of randomized studies have shown that the efficacy of drugs such as alendronate, risedronate, raloxifene, teriparatide and denosumab is similar to that of the general population in patients with a mild/moderate decline in their glomerular filtration rate (especially CKD-3). These studies have some flaws however, as they included mostly “healthy” women with no known diagnosis of CKD and generally with normal lab test results. Nevertheless, there are also some positive preliminary data in more advanced stages (CKD-4), even though in CKD-5D they are more limited. Therefore, at least in the absence of significant mineral metabolism disorders (i.e. severe hyperparathyroidism), the potential benefit of these drugs should be considered in patients with a high or very high fracture risk. It is an important change that the new guidelines do not make it a requirement to first perform a bone biopsy and that the risk/benefit ratio of these drugs may be justified. However, we must also be aware that most studies are not consistent and the level of evidence is low. Consequently, any pharmacological intervention (risk/benefit) should be prudent and individualized. Resumen: La osteoporosis (OP) y la enfermedad renal crónica (ERC) influyen independientemente en la salud ósea. Numerosos pacientes con ERC presentan una disminución de densidad mineral ósea (DMO), un elevado riesgo de fracturas por fragilidad ósea y un incremento de su morbimortalidad. Con el envejecimiento de la población estos hechos no son dependientes solo de la «osteodistrofia renal» sino también de la OP asociada. Dado que la DMO tiene capacidad predictiva en pacientes con ERC (parte I), ahora analizaremos las implicaciones terapéuticas derivadas. Análisis post hoc de estudios aleatorizados han mostrado que fármacos como alendronato, risedronato, raloxifeno, teriparatida o denosumab tienen una eficacia comparable a la población general en pacientes con una disminución leve-moderada del filtrado glomerular (especialmente ERC-3). Estos estudios tienen limitaciones, pues incluyen mayoritariamente mujeres «sanas», sin diagnóstico conocido de ERC y habitualmente con parámetros normales de laboratorio; sin embargo, también existen datos positivos preliminares en estadios más avanzados (ERC-4) y más limitados en ERC-5D. Por todo ello, al menos en ausencia de alteraciones significativas del metabolismo mineral (i.e., hiperparatiroidismo severo), el beneficio potencial de dichos fármacos debería ser considerado en pacientes que presenten un riesgo de fractura elevado o muy elevado. Es novedad importante que las nuevas guías no condicionan su uso a la práctica de una biopsia ósea previa y que el beneficio/riesgo de estos fármacos podría estar justificado. Sin embargo, debemos considerar que la mayoría de estudios no son consistentes y tienen un bajo grado de evidencia, por lo que la indicación farmacológica (riesgo/beneficio) debe ser individualizada y prudente. Keywords: Osteoporosis, CKD-MBD, Bone mineral density, Fractures, CKD, DEXA, Bisphosphonates, Denosumab, Romosozumab, Palabras clave: Osteoporosis, CKD-MBD, Densidad mineral ósea, Fracturas, ERC, DEXA, Bisfosfonatos, Denosumab, Romosozumab

Tumor organoids are defined as self-organized three-dimensional assemblies of heterogeneous cell types derived from patient samples that mimic the key histopathological, genetic, and phenotypic characteristics of the original tumor. This technology is proposed as an ideal candidate for the evaluation of possible therapies against cancer, presenting advantages over other models which are currently used. However, there are no reports in the literature that relate the techniques and material development of tumor organoids or that emphasize in the physicochemical and biological properties of materials that intent to biomimicry the tumor extracellular matrix. There is also little information regarding the tools to identify the correspondence of native tumors and tumoral organoids (tumoroids). Moreover, this paper relates the advantages of organoids compared to other models for drug evaluation. A growing interest in tumoral organoids has arisen from 2009 to the present, aimed at standardizing the process of obtaining organoids, which more accurately resemble patient-derived tumor tissue. Likewise, it was found that the characteristics to consider for the development of organoids, and therapeutic responses of them, are cell morphology, physiology, the interaction between cells, the composition of the cellular matrix, and the genetic, phenotypic, and epigenetic characteristics. Currently, organoids have been used for the evaluation of drugs for brain, lung, and colon tumors, among others. In the future, tumor organoids will become closer to being considered a better model for studying cancer in clinical practice, as they can accurately mimic the characteristics of tumors, in turn ensuring that the therapeutic response aligns with the clinical response of patients.

Colorectal Cancer (CRC) ranks third in terms of incidence and second in terms of mortality and prevalence worldwide. In relation to chemotherapy treatment, the most used drug is 5-fluorouracil (5-FU); however, the use of this drug generates various toxic effects at the systemic level. For this reason, new therapeutic strategies are currently being sought that can be used as neoadjuvant or adjuvant treatments. Recent research has shown that natural compounds, such as genistein, have chemotherapeutic and anticancer effects, but the mechanisms of action of genistein and its molecular targets in human colon cells have not been fully elucidated. The results reported in relation to non-malignant cell lines are also unclear, which does not allow evidence of the selectivity that this compound may have. Therefore, in this work, genistein was evaluated in vitro in both cancer cell lines SW480 and SW620 and in the non-malignant cell line HaCaT. The results obtained show that genistein has selectivity for the SW480 and SW620 cell lines. In addition, it inhibits cell viability and has an antiproliferative effect in a dose-dependent manner. Increased production of reactive oxygen species (ROS) was also found, suggesting an association with the cell death process through various mechanisms. Finally, the encapsulation strategy that was proposed made it possible to demonstrate that bacterial nanocellulose (BNC) is capable of protecting genistein from the acidic conditions of gastric fluid and also allows the release of the compound in the colonic fluid. This would allow genistein to act locally in the mucosa of the colon where the first stages of CRC occur.

Genistein is an isoflavone with antioxidant, anti-inflammatory, and anticancer properties. That said, its use in the industry is limited by its low solubility in aqueous systems. In this work, bacterial nanocellulose (BNC) and BNC modified with cetyltrimethylammonium (BNC-CTAB) were evaluated as genistein-encapsulating materials for their controlled release in cancer chemoprevention. Thin films were obtained and characterized by contact angle, AFM, TEM, UV–Vis spectroscopy FTIR, and TGA techniques to verify surface modification and genistein encapsulation. The results show a decrease in hydrophilization degree and an increase in diameter after BNC modification. Furthermore, the affinity of genistein with the encapsulating materials was determined in the context of monolayer and multilayer isotherms, thermodynamic parameters and adsorption kinetics. Spontaneous, endothermic and reversible adsorption processes were found for BNC-GEN and BNC-CTAB-GEN. After two hours, the maximum adsorption capacity corresponded to 4.59 mg GEN∙g−1 BNC and 6.10 mg GEN∙g−1 BNC-CTAB; the latter was a more stable system. Additionally, in vitro release assays performed with simulated gastrointestinal fluids indicated controlled and continuous desorption in gastric and colon fluids, with a release of around 5% and 85%, respectively, for either system. Finally, the IC50 tests made it possible to determine the amounts of films required to achieve therapeutic concentrations for SW480 and SW620 cell lines.

Background and study aims: Endoscopy plays an essential role in managing patients with ulcerative colitis (UC), as it allows us to visualize and assess the severity of the disease. As such assessments are not always objective, different scores have been devised to standardize the findings. The main aim of this study was to assess the interobserver variability between the Mayo Endoscopy Score (MES), Ulcerative Colitis Endoscopy Index of Severity (UCEIS) and Ulcerative Colitis Colonoscopy Index of Severity (UCCIS) analyzing the severity of the endoscopic lesions in patients with ulcerative colitis. Patients and methods: This was a single-cohort observational study in which a colonoscopy was carried out on patients with UC, as normal clinical practice, and a video was recorded. The results from the video were classified according to the MES, UCEIS and UCCIS by three endoscopic specialists independently, and they were compared to each other. The Mayo Endoscopy Score (MES) was used to assess the clinical situation of the patient. The therapeutic impact was analyzed after colonoscopy was carried out. Results: Sixty-seven patients were included in the study. The average age was 51 (SD ± 16.7) and the average MES was 3.07 (SD ± 2.54). The weighted Kappa index between endoscopists A and B for the MES was 0.8; between A and C 0.52; and between B and C 0.49. The intraclass correlation coefficient for UCEIS was 0.92 among the three endoscopists (CI 95 %: 0.83–0.96) and 0.96 for UCCIS among the three endoscopists (CI 95 % 0.94–0.97). A change in treatment for 34.3 % of the patients was implemented on seeing the results of the colonoscopy. Conclusions: There was an adequate, but not perfect, correlation between the different endoscopists for MES, UCEIS, UCCIS. This was higher with the last two scores. Thus, there is still some subjectivity to be minimized through special training, on assessing the seriousness of the endoscopic lesions in patients with UC.

This article investigates traditional and modern adhesives used to consolidate distemper paintings on canvas, with special reference to sixteenth century Hispano-tüchlein paintings, also called sargas. Such artworks are not only difficult to handle due to their large size, but they are also inherently fragile and/or are highly hygroscopic. This sensitivity is caused in part by the nature of the painting technique as well as the lack of varnish, which might account for why conservation methods related to these works have not been addressed in the past. This investigation was conducted on historical reconstructions samples to assess and develop treatment strategies for distemper paintings, in particular issues linked to powdery/friable matte paint layers. The impact of several adhesives on the painted surface of historical reconstructions was evaluated before and after the samples were subjected to humidity cycling tests using a range of analytical techniques. Such information can be used to aid conservators who face consolidation issues related to underbound paintings or artworks with similar surfaces. The results reveal that there is no one perfect adhesive for matte paint nor one that can be removed completely, once applied. Aquazol® 200 and Funori performed the best, but still introduced changes in colour and gloss, even if minimal.

ABSTRACT Objective: The aim of the present study was to design a content-valid nursing objective structured clinical examination attending a first-year clinical nursing practice program. Method: The examination was designed following a procedure based on the consensus of experts which was comprised of three phases: selection of the activities in which students should be competent according to the learning outcomes of the course, clinical case design, and integration of the clinical cases designed into the stations of the test. Results: Of the 44 surveys submitted for the design of the stations, 37 were answered, of which 31 respondents met the inclusion criteria of the panel of experts. The activities on which the experts reached the highest degrees of consensus were: basic physical assessment and monitoring of vital signs, assessment of hygiene and skin status, ability to develop care plans, management of safety principles in administration of medication and administration of oral medication. Based on the selected activities, the experts developed 20 clinical cases, from which a four-station nursing objective structured clinical examination was designed. Conclusion: The structured methodology based on the design of experts enabled the design of a content-valid objective structured clinical examination appropriate for the evaluation of the learning outcomes achieved by the students attending a clinical practice program.

El trabajo parte de la determinación con un estudio diagnóstico, de las insuficiencias que presentan los estudiantes de Técnico Medio en Electricidad, en el desarrollo de la cultura energética, que afecta su formación integral debido a que en el diseño curricular de las asignaturas técnicas de la especialidad de Electricidad no aparece como contenidos los aspectos referidos a la cultura energética. Como vía de solución al problema se propone un programa de estudio para el tratamiento a la cultura energética en los estudiantes de Técnico Medio en Electricidad, a través del proceso pedagógico profesional que se desarrolla en la Escuela Politécnica de Cuba. El problema social de la ciencia que se plantea en este trabajo tiene gran connotación social, pues su solución permite formar cualidades de la personalidad del técnico medio en electricidad vinculadas a una adecuada relación sujeto objeto, que le permite adaptarse al escenario formativo donde se desarrolla y transforma para satisfacer las necesidades sociales a partir de su relación con el medio, lo que se concreta en la relación sujeto objeto con la educación energética de los estudiantes. Este resultado se sustenta en los principios y regularidades que caracterizan a la Pedagogía de la Educación Técnica y Profesional.

High-performance regenerated silkworm (Bombyx mori) silk fibers can be produced efficiently through the straining flow spinning (SFS) technique. In addition to an enhanced biocompatibility that results from the removal of contaminants during the processing of the material, regenerated silk fibers may be functionalized conveniently by using a range of different strategies. In this work, the possibility of implementing various functionalization techniques is explored, including the production of fluorescent fibers that may be tracked when implanted, the combination of the fibers with enzymes to yield fibers with catalytic properties, and the functionalization of the fibers with cell-adhesion motifs to modulate the adherence of different cell lineages to the material. When considered globally, all these techniques are a strong indication not only of the high versatility offered by the functionalization of regenerated fibers in terms of the different chemistries that can be employed, but also on the wide range of applications that can be covered with these functionalized fibers.

Osteoporosis (OP) and chronic kidney disease (CKD) independently influence bone and cardiovascular health. A considerable number of patients with CKD, especially those with stages 3a to 5D, have a significantly reduced bone mineral density leading to a high risk of fracture and a significant increase in associated morbidity and mortality. Independently of classic OP related to age and/or gender, the mechanical properties of bone are also affected by inherent risk factors for CKD (“uraemic OP”). In the first part of this review, we will analyse the general concepts regarding bone mineral density, OP and fractures, which have been largely undervalued until now by nephrologists due to the lack of evidence and diagnostic difficulties in the context of CKD. It has now been proven that a reduced bone mineral density is highly predictive of fracture risk in CKD patients, although it does not allow a distinction to be made between the causes which generate it (hyperparathyroidism, adynamic bone disease and/or senile osteoporosis, etc.). Therefore, in the second part, we will analyse the therapeutic indications in different CKD stages. In any case, the individual assessment of factors which represent a higher or lower risk of fracture, the quantification of this risk (i.e. using tools such as FRAX®) and the potential indications for densitometry in patients with CKD could represent an important first step pending new clinical guidelines based on randomised studies which do not exclude CKD patients, all the while avoiding therapeutic nihilism in an area of growing importance. Resumen: Osteoporosis (OP) y enfermedad renal crónica (ERC) influyen de manera independiente en la salud ósea y cardiovascular. Un número significativo de pacientes con ERC, especialmente desde estadios 3a a 5D, presentan una disminución significativa de la densidad mineral ósea condicionando un alto riesgo de fractura y un incremento importante de la morbimortalidad asociada. Independientemente de la OP clásica asociada a edad y/o sexo, las propiedades mecánicas del hueso se encuentran afectadas adicionalmente por factores intrínsecos a la ERC («OP urémica»). En la primera parte de esta revisión, analizaremos conceptos generales sobre densidad mineral ósea, OP y fracturas, en gran parte infravalorados hasta ahora por los nefrólogos debido a la falta de evidencias y a las dificultades diagnósticas en el contexto de la ERC. Actualmente se ha demostrado que una densidad mineral ósea disminuida es realmente predictiva del riesgo de fracturas en pacientes con ERC, aunque no permite distinguir entre las causas que la originan (hiperparatiroidismo, enfermedad adinámica del hueso y/o osteoporosis senil, etc.). Por ello, en la segunda parte analizaremos las implicaciones terapéuticas en distintos estadios de la ERC. En cualquier caso, la valoración individualizada de los factores mayores y menores del riesgo de fractura, la cuantificación de dicho riesgo (i.e. con el uso de herramientas como el FRAX®) y las indicaciones potenciales de densitometría en pacientes con ERC podrían constituir un primer paso importante en espera de nuevas guías clínicas basadas en estudios aleatorizados que no excluyan a pacientes con ERC, evitando mientras tanto nihilismo terapéutico en un área de creciente importancia. Keywords: Osteoporosis, CKD–MBD, Bone mineral density, Fractures, FRAX, Chronic kidney disease, DEXA, Palabras clave: Osteoporosis, CKD-MBD, Densidad mineral ósea, Fracturas, FRAX, Enfermedad renal crónica, DEXA

Resumen: Osteoporosis (OP) y enfermedad renal crónica (ERC) influyen de manera independiente en la salud ósea y cardiovascular. Un número significativo de pacientes con ERC, especialmente desde estadios 3a a 5D, presentan una disminución significativa de la densidad mineral ósea condicionando un alto riesgo de fractura y un incremento importante de la morbimortalidad asociada. Independientemente de la OP clásica asociada a edad y/o sexo, las propiedades mecánicas del hueso se encuentran afectadas adicionalmente por factores intrínsecos a la ERC («OP urémica»). En la primera parte de esta revisión, analizaremos conceptos generales sobre densidad mineral ósea, OP y fracturas, en gran parte infravalorados hasta ahora por los nefrólogos debido a la falta de evidencias y a las dificultades diagnósticas en el contexto de la ERC. Actualmente se ha demostrado que una densidad mineral ósea disminuida es realmente predictiva del riesgo de fracturas en pacientes con ERC, aunque no permite distinguir entre las causas que la originan (hiperparatiroidismo, enfermedad adinámica del hueso y/o osteoporosis senil, etc.). Por ello, en la segunda parte analizaremos las implicaciones terapéuticas en distintos estadios de la ERC. En cualquier caso, la valoración individualizada de los factores mayores y menores del riesgo de fractura, la cuantificación de dicho riesgo (i.e. con el uso de herramientas como el FRAX®) y las indicaciones potenciales de densitometría en pacientes con ERC podrían constituir un primer paso importante en espera de nuevas guías clínicas basadas en estudios aleatorizados que no excluyan a pacientes con ERC, evitando mientras tanto nihilismo terapéutico en un área de creciente importancia. Abstract: Osteoporosis (OP) and chronic kidney disease (CKD) independently influence bone and cardiovascular health. A considerable number of patients with CKD, especially those with stages 3a to 5D, have a significantly reduced bone mineral density leading to a high risk of fracture and a significant increase in associated morbidity and mortality. Independently of classic OP related to age and/or gender, the mechanical properties of bone are also affected by inherent risk factors for CKD (“uraemic OP”). In the first part of this review, we will analyse the general concepts regarding bone mineral density, OP and fractures, which have been largely undervalued until now by nephrologists due to the lack of evidence and diagnostic difficulties in the context of CKD. It has now been proven that a reduced bone mineral density is highly predictive of fracture risk in CKD patients, although it does not allow a distinction to be made between the causes which generate it (hyperparathyroidism, adynamic bone disease and/or senile osteoporosis, etc.). Therefore, in the second part, we will analyse the therapeutic indications in different CKD stages. In any case, the individual assessment of factors which represent a higher or lower risk of fracture, the quantification of this risk (i.e. using tools such as FRAX®) and the potential indications for densitometry in patients with CKD could represent an important first step pending new clinical guidelines based on randomised studies which do not exclude CKD patients, all the while avoiding therapeutic nihilism in an area of growing importance. Palabras clave: Osteoporosis, CKD-MBD, Densidad mineral ósea, Fracturas, FRAX, Enfermedad renal crónica, DEXA, Keywords: Osteoporosis, CKD-MBD, Bone mineral density, Fractures, FRAX, Chronic kidney disease, DEXA

Polymersomes are biomimetic cell membrane-like model structures that are self-assembled stepwise from amphiphilic copolymers. These polymeric (nano)carriers have gained the scientific community’s attention due to their biocompatibility, versatility, and higher stability than liposomes. Their tunable properties, such as composition, size, shape, and surface functional groups, extend encapsulation possibilities to either hydrophilic or hydrophobic cargoes (or both) and their site-specific delivery. Besides, polymersomes can disassemble in response to different stimuli, including light, for controlling the “on-demand” release of cargo that may also respond to light as photosensitizers and plasmonic nanostructures. Thus, polymersomes can be spatiotemporally stimulated by light of a wide wavelength range, whose exogenous response may activate light-stimulable moieties, enhance the drug efficacy, decrease side effects, and, thus, be broadly employed in photoinduced therapy. This review describes current light-responsive polymersomes evaluated for anticancer therapy. It includes light-activable moieties’ features and polymersomes’ composition and release behavior, focusing on recent advances and applications in cancer therapy, current trends, and photosensitive polymersomes’ perspectives.

Resumen: Objetivo: Valorar la aceptabilidad y la factibilidad de la búsqueda oportunista del VIH por parte de los profesionales de atención primaria. Conocer el perfil del médico que participa en este tipo de estudio. Diseño: Estudio observacional, transversal. Emplazamiento: Centros de atención primaria del Sistema Nacional de Salud. Participantes: Médicos de familia y residentes que participaron en el estudio VIH-AP para medir la aceptabilidad de la búsqueda oportunista del VIH por parte de los pacientes. Mediciones principales: Mediante encuesta autocumplimentada se determinó: edad, sexo, cualidad de docente, años de investigación, tiempo trabajando con el mismo cupo, aceptabilidad y factibilidad de la búsqueda oportunista del VIH. Resultados: Un total de 197 médicos con una media de edad de 45,2 ± 9,7 (DT) años. El 18,8% eran menores de 36 años, el 70,1% mujeres y el 62,4% docentes. El 55,8% trabajaban en localidades mayores de 100.000 habitantes y la media de años ocupando el mismo cupo fue de 6,4 ± 6,6. El 91,9% (IC 95%: 88,1-98,7) consideró la búsqueda oportunista del VIH aceptable, el 89,3% (IC 95%: 85,0-93,6), factible de realizar, mostrando el análisis multivariante relación positiva con el realizar actividad docente (OR: 2,74; IC 95%: 1,16-6,49). La aceptación de la prueba por parte de los pacientes fue del 93,1%, y esta se relacionó positivamente con el tiempo que el médico había trabajado en el mismo cupo, la cualidad de docente y los años dedicados a la investigación. Conclusiones: La búsqueda oportunista del VIH es un método aceptable y factible para los profesionales de atención primaria. Abstract: Objective: To evaluate the acceptability and feasibility of the opportunistic search of HIV according to primary care doctorsâ experience. To set up the profile of the physician involved in this study. Design: Observational, transversal study. Location: Primary Care Centers of the National Health System. Participants: General practitioners and residents who participated in VIH-AP study to measure the acceptability of HIV opportunistic search by patients. Main measurements: Self-filling survey to collect data on age, sex, teaching skills, amount of years dedicated to research, time working with the same quota of patients, acceptability and feasibility of opportunistic HIV search. Results: A total of 197 physicians with a mean age of 45.2 ± 9.7 (SD) years. 18.8% were under 36 years old, 70.1% were women and 62.4% had teaching skills. 55.8% worked in towns with a population over 100,000 inhabitants and the mean of years working with the same quota of patients was 6.4 ± 6.6. 91.9% (95% CI: 88.1-98.7) of them considered the opportunistic search of HIV acceptable and 89.3% (95% CI: 85.0-93.6), feasible to perform. The multivariate analysis showed positive relation between the acceptability/feasibility and teaching skills (OR: 2.74; 95% CI: 1.16-6.49). The acceptance of the screening by patients was 93.1% and this was positively related to how long the doctor had worked with the same quota, teaching skills and the amount of years dedicated to research. Conclusions: HIV opportunistic search is an acceptable and feasible method for primary care professionals. Palabras clave: Virus de la inmunodeficiencia humana, Detección precoz, Cribado oportunista, Aceptabilidad, Keywords: Human immunodeficiency virus, Early detection, Case finding, Patient acceptance

O presente artigo aborda a temática da constituição da masculinidade, enfocando esse processo dentro do período da adolescência e trazendo questões da atualidade envolvidas no declínio da função parental. Ele integra os aspectos descritos anteriormente a partir de autores clássicos e contemporâneos. Conclui-se que a atualidade, com as decorrentes mudanças na estrutura familiar, traz novos aspectos a serem levados em conta para a constituição da masculinidade. Palavras-chave: Adolescência. Identidade de Gênero Função Parental.

Objective To characterise heart failure (HF) maintenance pharmacotherapy for children across Europe and investigate how angiotensin-converting enzyme inhibitors (ACE-I) are used in this setting.Methods A Europe-wide web-based survey was conducted between January and May 2015 among European paediatricians dedicated to cardiology.Results Out of 200-eligible, 100 physicians representing 100 hospitals in 27 European countries participated. All participants reported prescribing ACE-I to treat dilated cardiomyopathy-related HF and 97% in the context of congenital heart defects; 87% for single ventricle physiology. Twenty-six per cent avoid ACE-I in newborns. Captopril was most frequently selected as first-choice for newborns (73%) and infants and toddlers (66%) and enalapril for children (56%) and adolescents (58%). Reported starting and maintenance doses varied widely. Up to 72% of participants follow formal creatinine increase limits for decision-making when up-titrating; however, heterogeneity in the cut-off points selected existed. ACE-I formulations prescribed by 47% of participants are obtained from more than a single source. Regarding symptomatic HF maintenance therapy, 25 different initial drug combinations were reported, although 79% select a regimen that includes ACE-I and diuretic (thiazide and/or loop), 61% ACE-I and aldosterone antagonist; 44% start with beta-blocker, 52% use beta-blockers as an add-on drug. Of the 89 participants that prescribe pharmacotherapy to asymptomatic patients, 40% do not use ACE-I monotherapy or ACE-I-beta-blocker two-drug only combination.Conclusions Despite some reluctance to use them in newborns, ACE-I seem key in paediatric HF treatment strategies. Use in single ventricle patients seems frequent, in apparent contradiction with current paediatric evidence. Disparate dosage criteria and potential formulation-induced variability suggest significant differences may exist in the risk-benefit profile children are exposed to. No uniformity seems to exist in the drug regimens in use. The information collected provides relevant insight into real-life clinical practice and may facilitate research to identify the best therapeutic options for HF children.

Objetivo: Valorar la aceptabilidad de la prueba del virus de la inmunodeficiencia humana (VIH) mediante búsqueda oportunista. Diseño: Estudio observacional, transversal. Emplazamiento: Centros de atención primaria (CAP) del Sistema Nacional de Salud. Participantes: Pacientes de 18 a 65 años a los que hubiese que realizar una analítica y que nunca antes se hubiesen realizado la prueba del VIH. Mediciones principales: Edad, sexo, pareja estable, nivel de instrucción, consumo de tabaco/alcohol, motivo de la analítica, aceptabilidad de la prueba del VIH, motivo por el que no acepta o por el que no se le ha realizado antes. Se realizó un análisis estadístico descriptivo, bivariante y multivariante (regresión logística). Resultados: Doscientos ocho médicos de 150 CAP captaron 3.314 pacientes. La aceptabilidad del test del VIH fue del 93,1% (IC 95%: 92,2-93,9). De estos, el 56,9% no se la habían realizado antes por no considerarse en riesgo, y el 34,8% por no habérsela ofertado su médico. Del 6,9% que rechazaron la serología, el 73,9% alegaron no considerarse en riesgo. Mediante análisis de regresión logística las variables que mostraron relación con la aceptabilidad de la prueba positivamente fueron: la edad (grupo de 26 a 35 años; OR = 1,79; IC 95%:1,10-2,91) y ser no fumador (OR = 1,39; IC 95%: 1,01-1,93). Los residentes en poblaciones entre 10.000 y 50.000 habitantes (OR = 0,57; IC 95%: 0,40-0,80) fueron los que en menor grado aceptaron la prueba. La prevalencia de VIH detectada fue del 0,24%. Conclusiones: La prueba serológica del VIH tiene una alta aceptación entre los usuarios que acuden para hacerse un análisis de sangre a los CAP. La búsqueda oportunista es coste-efectiva.

The interactions between films of bacterial nanocellulose (BNC) and B complex vitamins were studied using a Quartz Crystal Microbalance with Dissipation monitoring (QCM-D). Thin films of BNC were generated in situ by QCM-D, followed by real-time measurements of the vitamin adsorption. The desorption of vitamins was induced by rinsing the system using phosphate buffers at a pH of 2 and 6.5, emulating gastric conditions. Changes in frequency (which are proportional to changes in adsorbed mass, ∆m) detected by QCM-D were used to determine the amounts of vitamin adsorbed and released from the BNC film. Additionally, changes in dissipation (∆D) were proven to be useful in identifying the effects of the pH in both pristine cellulose films and films with vitamin pre-adsorbed, following its changes during release. The effects of pH on the morphology of the vitamin-BNC surfaces were also monitored by changes in rugosity from images obtained by atomic force microscopy (AFM). Based on this data, we propose a model for the binding phenomena, with the contraction on the relaxation of the cellulose film depending on pH, resulting in an efficient vitamin delivery process.

Colorectal cancer (CRC) is the type with the second highest morbidity. Recently, a great number of bioactive compounds and encapsulation techniques have been developed. Thus, this paper aims to review the drug delivery strategies for chemotherapy adjuvant treatments for CRC, including an initial scientific-technological analysis of the papers and patents related to cancer, CRC, and adjuvant treatments. For 2018, a total of 167,366 cancer-related papers and 306,240 patents were found. Adjuvant treatments represented 39.3% of the total CRC patents, indicating the importance of adjuvants in the prognosis of patients. Chemotherapy adjuvants can be divided into two groups, natural and synthetic (5-fluorouracil and derivatives). Both groups can be encapsulated using polymers. Polymer-based drug delivery systems can be classified according to polymer nature. From those, anionic polymers have garnered the most attention, because they are pH responsive. The use of polymers tailors the desorption profile, improving drug bioavailability and enhancing the local treatment of CRC via oral administration. Finally, it can be concluded that antioxidants are emerging compounds that can complement today’s chemotherapy treatments. In the long term, encapsulated antioxidants will replace synthetic drugs and will play an important role in curing CRC.

The goal of this project, one of the proposals of the EPS@ISEP Spring 2014, was to develop an Aquaponics System. Over recent years Aquaponics systems have received increased attention since they contribute to reduce the strain on resources within 1st and 3rd world countries. Aquaponics is the combination of Hydroponics and Aquaculture and mimics a natural environment in order to successfully apply and enhance the understanding of natural cycles within an indoor process. Using this knowledge of natural cycles, it was possible to create a system with capabilities similar to that of a natural environment with the support of electronics, enhancing the overall efficiency of the system. The multinational team involved in the development of this system was composed of five students from five countries and fields of study. This paper describes their solution, involving the overall design, the technology involved and the benefits it can bring to the current market. The team was able to design and render the Computer Aided Design (CAD) drawings of the prototype, assemble all components, successfully test the electronics and comply with the budget. Furthermore, the designed solution was supported by a product sustainability study and included a specific marketing plan. Last but not least, the students involved in this project obtained new multidisciplinary knowledge and improved their sustainable development, social compromise, team work and cross-cultural communication skills.

Excessive fossil fuel consumption is driving the search for alternative energy production solutions and, in particular, for sustainable sources of energy such as microalgae, from which biodiesel, among other useful compounds, can be obtained. After producing the microalgae, they must be harvested and dried. Existing drying solutions consume too much energy and are, therefore, expensive and unsustainable. The goal of this EPS@ISEP Spring 2013 project was to develop a solar microalgae dryer for the microalgae laboratory of ISEP. A multinational team of five students from distinct fields of study was responsible for designing and building the solar microalgae dryer prototype. The prototype includes a control system to ensure that the microalgae are not destroyed during the drying process. The solar microalgae dryer works as a distiller, extracting the excess water from the microalgae suspension. This paper details the design steps, the building technologies, the ethical and sustainable concerns and compares the prototype with existing solutions. The proposed sustainable microalgae drying process is competitive as far as energy usage is concerned. Finally, the project contributed to increase the team’s sustainable development awareness, active learning and motivation.

This study assessed the effect of molecular weight (MW) reduction by gamma irradiation on the antioxidant capacity of chitosan with potential application in the preservation of foodstuffs. Two batches of chitosan were obtained by heterogeneous chemical N-deacetylation of chitin from common lobster (Panulirus argus). Irradiation of chitosan was performed using a 60Co source and applying doses of 5, 10, 20 and 50 kGy with a dose rate of 10 kGy/h. Attenuated Total Reflection Fourier Transform Infrared Spectroscopy was used to identify main chemical features of chitosan. The average viscosimetric MW was determined by the viscosimetric method while the deacetylation degree by a potentiometric method. Thermogravimetric analysis and differential scanning calorimetry were conducted to evaluate the thermal degradation behavior of the chitosan samples, both under nitrogen flow. The antioxidant activity of chitosan solutions at 1% (w/v) in lactic acid at 1% (v/v) and Tween 80 at 0.1% (v/v) was evaluated through the ABTS assay and scavenging of DPPH radical by chitosan. The increase of irradiation dose with 60Co until 50 kGy decreased significantly the MW of chitosan through the scission of glycosidic bonds without affecting its functional groups, while the DD (72–75 %) did not vary (p > 0.05). The AC of the chitosan solutions increased with the reduction of MW of chitosan by gamma irradiation.

O jogo interativo designado por “Vogais Saltitantes” é um jogo onde o principal objetivo consiste na intervenção junto de alunos com necessidades educativas especiais (NEE) que apresentam problemas de linguagem em geral, e/ou especificamente alunos com disnomia. Este jogo foi construído e desenvolvido em cinco partes, onde cada uma delas pretende trabalhar cada vogal individualmente. O aluno é levado a associar palavras iniciadas por cada vogal com a imagem correspondente.

El Position on Nursing Diagnosis (PND) es una escala que utiliza la técnica del diferencial semántico para medir las actitudes hacia el concepto diagnóstico enfermero. El estudio objetivó desarrollar una forma abreviada de la versión española de esta escala, evaluar sus propiedades psicométricas y eficiencia. Se utilizó un doble enfoque empírico-teórico para obtener una forma reducida del PND, el PND-7-SV, que fuera equivalente a la original. Mediante un diseño transversal a través de encuesta, se evaluó la fiabilidad (consistencia interna y fiabilidad test-retest), validez de constructo (análisis factorial exploratorio, técnica de grupos conocidos y validez discriminante) y de criterio (validez concurrente), sensibilidad al cambio y eficiencia del PND-7-SV en una muestra de 476 estudiantes de enfermería españoles. Los resultados avalaron la utilidad del PND-7-SV para medir las actitudes hacia el diagnóstico enfermero de manera equivalente a la forma completa de la escala y en un tiempo más reducido.

We investigated wound dressing composites comprising fibrils of bacterial cellulose (BC) grown by fermentation in the presence of polyvinyl alcohol (PVA) followed by physical crosslinking. The reference biointerface, neat BC, favoured adhesion of fibroblasts owing to size exclusion effects. Furthermore, it resisted migration across the biomaterial. Such effects were minimized in the case of PVA/BC membranes. Therefore, the latter are suggested in cases where cell adhesion is to be avoided, for instance, in the design of interactive wound dressings with facile exudate control. The bioactivity and other properties of the membranes were related to their morphology and structure and considered those of collagen fibres. Bioactive materials were produced by simple 3D templating of BC during growth and proposed for burn and skin ulcer treatment.

En los últimos años parece existir un notable consenso acerca de la importancia de las conductas y/o actitudes problemáticas de los alumnos, las situaciones conflictivas y la ausencia de apoyo social como factores que dificultan la convivencia escolar y contribuyen a incrementar el malestar laboral de los docentes. No obstante, son escasos los estudios empíricos realizados en torno a las relaciones entre dichas casuísticas y las variables de personalidad. El propósito de esta investigación es, a partir de una muestra de 1537 profesores de Enseñanza Secundaria Obligatoria, identificar cuáles son las fuentes de estrés que establecen diferencias significativas entre distintos niveles de optimismo (bajo, moderado y alto) autoinformado por los docentes; se analiza, también, si las facetas de estrés (conductas problemáticas de los alumnos, ausencia de apoyo social y conflicto) discriminan entre los profesores que informan de bajo vs. alto optimismo. Los resultados permiten concluir que los estresores considerados diferencian válidamente entre los niveles de optimismo. Se constata, asimismo, que las facetas conflicto y conductas problemáticas de los alumnos permiten discriminar en función del optimismo de los profesores.

In order to determine the prevalence of ocular lesions in HTLV-1 infected patients in Salvador Bahia, a transversal study was conducted on 140 HTLV-1 infected patients (90 asymptomatic and 50 tropical spastic paraparesis/HTLV-1-associated myelopathy) between June 2004 and November 2005. The ophthalmological examination included visual acuity measurement, ocular motility, biomicroscopy of the anterior and posterior chambers, intraocular pressure and evaluation of lachrymal secretion. Observation verified 4 (2.8%) out of 140 patients with uveitis (two patients had intermediate uveitis and two had pan-uveitis) and 39 (36.4%) out of 107 patients with keratoconjunctivitis sicca. The prevalence of Keratoconjunctivitis sicca was significantly higher among the TSP/HAM patients (OR age adjusted=3.64; 95%CI 1.59-8.32). Uveitis and corneal opacities were also important findings, indicating the strong need for periodic ophthalmological follow-up in all HTLV-1 subjects.Com o objetivo de determinar a prevalência de lesões oculares, em portadores de HTLV-1 em Salvador, Bahia, foi realizado um estudo transversal em 140 pacientes (90 assintomático e 50 com paraparesia espática tropical/mielopatia associada ao vírus linfotrópico de células T humanas) entre junho de 2004 e novembro de 2005. O exame oftalmológico incluiu medida da acuidade visual, exame da motilidade ocular, biomicroscopia anterior e posterior, pressão intraocular e avaliação do filme lacrimal. Observamos 4.0 (2.8%) pacientes com uveites (dois com uveíte intermediária e dois com panuveíte) e 39 (36,4%) pacientes com ceratoconjuntivite seca. A prevalência de Ceratoconjuntivite seca foi significantemente mais elevada entre os pacientes com TSP/HAM (RC ajustada para idade = 3,64; IC 95% 1,59-8,32). As uveítes e opacidades corneanas foram também, patologias importantes, indicando a necessidade de acompanhamento oftalmológico periódico nos portadores de HTLV-1.

For the last decades, natural fibers have been used as reinforcement of friendly environmental polymeric composites, due to their technical, economical and environmental advantages that include: moderate mechanical and thermal properties. However, the OH groups in some of their chemical structures like cellulose, reduce the compatibility with hydrophobic polymeric matrices such as polyolefines. Natural fiber, usually are exposed to chemical and physical treatment to reduce their hydrophilic tendency and to enhance fiber/matrix adhesion. Alkalinization, alkali treatment or mercerization, is one of the most common procedures applied on natural fibers. This process introduces important changes on its mechanical properties, physical and morphological characteristics, and chemical composition. In spite of other studies, it is necessary define surface treatment conditions in accordance with industrial processing and environmental considerations. In this study, the influence of different alkali treatment conditions on the fique fiber tensile behavior has been evaluated. Treatment parameters as solution concentration, exposure time and dry conditions have been analyzed. Fourier transformation infrared spectrophotometry (FTIR) analysis, atomic force (AFM) and optical microscopies have been used to evaluate alteration on chemical and morphological characteristics. Treatment conditions that include low solution concentration bring a good enough quality in the mechanical behavior required by fique fiber bundles as polymeric reinforcementDesde hace un par de décadas, las fibras naturales son en una importante alternativa como refuerzo de materiales compuestos reciclables e incluso biodegradagables. Pese a combinar ventajas técnicas, económicas y ambientales, su carácter hidrofílico es su principal barrera al incorporarlas en matrices poliméricas hidrofóbicas como las poliolefinas. Algunas modificaciones superficiales de carácter físico y químico, se han empleando en las fibras. Estos tratamientos a la par que reducen la tendencia hidrofílica, mejoran el desempeño de la interfase fibra/matriz. El tratamiento alcalino o mercerización se considera uno de los más importantes. Pese a los estudios que se han realizado sobre este proceso, persiste la necesidad de definir condiciones de aplicación para este tratamiento que brinden una adecuada combinación de desempeño mecánico con un reducido impacto sobre el medio ambiente a costos razonables. En el presente trabajo, se reporta una apropiada condición de tratamiento alcalino que equilibra bajas concentraciones de hidróxido de sodio con un buen comportamiento mecánico. Los parámetros considerados son: concentración de la solución, tiempo de exposición y tipo de secado. La espectroscopia infrarroja FTIR, la microscopía óptica (OM) y de fuerza atómica (AFM) indican que aún en estas condiciones de tratamiento la fibra experimenta cambios sobre su estructura y comportamiento

O objetivo deste texto é identificar, por meio de práticas sociais, manifestações culturais de organizações internacionalizadas, utilizando os modelos de pesquisa de D’Iribarne e de Hofstede. Do ponto de vista cultural, o modo como cada país conta com seus costumes, define seus direitos e deveres; constrói suas normas, coopera e estabelece relações faz com que as empresas internacionalizadas constituam um espaço com especificidades culturais, influenciando suas práticas ao se inserirem em países hospedeiros. Visando à identificação dessas práticas e das manifestações culturais que representam, foram considerados os conceitos de cultura, práticas sociais e internacionalização e os modelos de estudo de D’Iribarne e Hofstede. Os principais resultados mostram que valores, símbolos são inseparáveis de comportamentos, ações e práticas, moldando a cultura organizacional. Sugere-se, por derradeiro a utilização das duas abordagens – Hofstede e D’Iribarne – de forma complementar, a fim de identificar manifestações culturais de organizações internacionalizadas, destacando diferenças que se refletem nos modelos de gestão dessas organizações.

For the last decades, natural fibers have been used as reinforcement of friendly environmental polymeric composites, due to their technical, economical and environmental advantages that include: moderate mechanical and thermal properties. How ever, the OH groups in some of their chemical structures like cellulose, reduce the compatibility with hydrophobic polymeric matrices such as polyolefines. Natural fiber, usually are exposed to chemical and physical treatment to reduce their hydrophilic tendency and to enhance fiber/matrix adhesion. Alkalinization, alkali treatment or mercerization, is one of the most common procedures applied on natural fibers. This process introduces important changes on its mechanical properties, physical and morphological characteristics, and chemical composition. In spite of other studies, it is necessary de fine surface treatment conditions in accordance with industrial processing and environmental considerations. In this study, the influence of different alkali treatment conditions on the fique fiber tensile behavior has been evaluated. Treatment parameters as solution concentration, exposure time and dry conditions have been analyzed. Fourier transformation infrared spectrophotometry (FTIR) analysis, atomic force (AFM) and optical microscopies have been used to evaluate alteration on chemical and morphological characteristics. Treatment conditions that include low solution concentration bring a good enough quality in the mechanical behavior required by fique fiber bundles as polymeric reinforcement.

This paper explores the main elements that influence innovation and the relationships among them. It is pointed out that innovation results from an entrepreneurial action inside an established institutional context, sustained by resources, abilities and competences and with the support of the necessary financial capital. Therefore, it is proposed that innovation is a function (just as the microeconomic production function) composed of entrepreneurship, institutions, capabilities and capital. Each one of these elements is explored individually, so that later the relationships among them can be analyzed. It is still suggested that the size of the firm is a moderator in the relationship between these elements and innovation. The study’s contribution it is the development of a conceptual model.

Recomendações das Secções de Pneumologia e Infecciologia Pediátrica da Sociedade Portuguesa de Pediatria