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1.
Semergen ; 50(5): 102191, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38309199

RESUMO

BACKGROUND: During the last years, lifestyle has worsened along the entire European population, causing an alarming boom-up regarding overweight and obese people. Pediatric population is also influenced in this sense, which may predispose to suffer from several diseases in adulthood. Educational interventions at early ages could be an effective strategy to face this situation. AIM: To describe the impact of an educational intervention about healthy lifestyle in adolescents. METHODS: A quasi-experimental study analyzing the knowledge of high school students, before and after a brief educational intervention based on a self-elaborated questionnaire including questions from the validated questionnaire CAPA (from Spanish, Conocimientos en Alimentación de Personas Adolescentes). RESULTS: The results of this study show a significant increase in knowledge about healthy lifestyles in the study population after the educational intervention (14.3±3.8 vs. 16.5±4.5; p<0.001). In addition, this improvement presents an asymmetric distribution according to gender (13.2±3.6 vs. 14.9±4.6; p=0.002 in men; 15.6±3 vs. 18.1±3.6; p<0.001 in women) and the type of educational center (14.17±3.6 vs. 16.48±4.17; p<0.001 in public schools and 14.86±4.15 vs. 16.54±5.32; p=0.047 in private schools). Parents' educational level was associated with improvement in knowledge about healthy lifestyles (13.44±2.9 vs. 15.67±5.37; p=0.132 at low level, 14.22±3.42 vs. 16.9±4.68; p<0.001 at medium level and 15.75±3.3 vs. 17.39±4.5; p=0.022 at high level). CONCLUSION: Educational intervention taught by primary health care professionals is a useful and efficient tool for the acquisition of nutritional and healthy lifestyle knowledge in adolescents.


Assuntos
Educação em Saúde , Conhecimentos, Atitudes e Prática em Saúde , Estilo de Vida Saudável , Humanos , Adolescente , Masculino , Feminino , Inquéritos e Questionários , Educação em Saúde/métodos , Estudantes , Espanha , Instituições Acadêmicas
2.
Rev Neurol ; 77(s01): S13-S16, 2023 07 28.
Artigo em Espanhol | MEDLINE | ID: mdl-37477029

RESUMO

INTRODUCTION: Narcolepsy type 1 is a focal degenerative disease of the hypothalamus that selectively affects orexin (hypocretin)-producing neurons. It presents multiple clinical manifestations, both in wakefulness and in sleep. The symptoms are often so disruptive that they cause enormous suffering and impair patients' quality of life. Although a non-pharmacological approach is sometimes sufficient, the vast majority of patients need medication for adequate clinical management. CASE REPORT: A male who, at 43 years of age, began to present acutely with excessive daytime sleepiness and episodes of cataplexy. After a thorough examination, he was diagnosed with narcolepsy type 1. Throughout the course of the disease, he was prescribed antidepressants, neurostimulants and sodium oxybate, in monotherapy or in combination. The response to pharmacological treatment was insufficient and accompanied by numerous side effects. Following the introduction of pitolisant, there was a marked improvement in his symptoms and a reduction in the dose of the other drugs and their adverse effects was achieved. CONCLUSION: A number of measures are now available to address the cardinal symptoms of the disease, although there are still cases that are resistant to anti-narcoleptic treatment. Drugs with mechanisms of action that act upon receptors in the histaminergic system can be very useful in these cases.


TITLE: Narcolepsia multirresistente.Introducción. La narcolepsia de tipo 1 es una enfermedad degenerativa focal del hipotálamo que afecta selectivamente a las neuronas productoras de orexina (hipocretina). Presenta múltiples manifestaciones clínicas, tanto en vigilia como en sueño. Con frecuencia, los síntomas son tan disruptivos que ocasionan enorme sufrimiento y deterioro de la calidad de vida de los pacientes. Aunque en ocasiones es suficiente con un abordaje no farmacológico, la gran mayoría de los enfermos necesita medicación para un adecuado control clínico. Caso clínico. Varón que a los 43 años comenzó a presentar de forma aguda excesiva somnolencia diurna y episodios de cataplejía. Tras un exhaustivo estudio se le diagnosticó narcolepsia de tipo 1. A lo largo de la evolución de la enfermedad se le prescribieron antidepresivos, neuroestimulantes y oxibato sódico, en monoterapia o en combinación. La respuesta al tratamiento farmacológico fue insuficiente y se acompañó de numerosos efectos secundarios. Tras la introducción de pitolisant se objetivó una franca mejoría de los síntomas, y se consiguió reducir la dosis de los otros fármacos y de sus efectos adversos. Conclusión. Son numerosas las medidas disponibles en la actualidad para abordar los síntomas cardinales de la enfermedad, aunque siguen existiendo casos resistentes al tratamiento antinarcoléptico. Los fármacos con mecanismos de acción sobre receptores del sistema histaminérgico pueden resultar de gran utilidad en estos casos.


Assuntos
Resistência a Múltiplos Medicamentos , Narcolepsia , Humanos , Masculino , Antidepressivos/uso terapêutico , Cataplexia/complicações , Cataplexia/tratamento farmacológico , Estimulantes do Sistema Nervoso Central/uso terapêutico , Narcolepsia/tratamento farmacológico , Narcolepsia/complicações , Qualidade de Vida , Oxibato de Sódio/uso terapêutico , Adulto , Sonolência
3.
An Sist Sanit Navar ; 45(2)2022 Aug 18.
Artigo em Espanhol | MEDLINE | ID: mdl-35980248

RESUMO

BACKGROUND: The objective was to assess fatigue in children with complex chronic diseases (CCCDs) and analyze its relationship with clinical and sociodemographic characteristics, use of healthcare services, and quality of life (QoL). METHODS: Cross-sectional study carried out in CCCDs attended in a tertiary hospital during 2016. Fatigue (PedsFacit-F questionnaire) and quality of life (PedsQL) were determined, and the following variables were registered: use of health resources, disease group, time with disease, and educational level and type of employment of the parents. A multiple regression model was developed to predict the use of healthcare resources. RESULTS: Seventy children were included in this study; mean age 10.5 years (range: 8-17), 41.4% girls, and cancer was the most frequent group disease (28.6%). Annual use of healthcare resources (38.86; SD: 30.73) increased with fatigue (r=-0.292; p=0.015). Higher levels of fatigue were determined for children with cancer (24.9; SD: 10.7) in comparison to other pathologies, while lower levels were found for heart diseases (44.5; SD: 7.9). The QoL perceived by CCCDs (20.6; SD: 16.5) directly correlated (p<0.001) with that of their parents (22.8; SD: 16.8); a correlation with fatigue was seen in both cases (r=0.528 and r= 0.441; p<0.0001). The adjusted effect of higher levels of fatigue (lower scores), lower length of disease duration, and higher level of education of the mother, predicted greater use of healthcare resources. CONCLUSION: CCCDs with higher fatigue levels use healthcare resources more often and perceive a worse QoL. This should be considered when providing care to this population.


Assuntos
Neoplasias , Qualidade de Vida , Criança , Doença Crônica , Estudos Transversais , Atenção à Saúde , Fadiga/epidemiologia , Fadiga/etiologia , Feminino , Humanos , Masculino , Inquéritos e Questionários
4.
Sci Rep ; 12(1): 14304, 2022 Aug 22.
Artigo em Inglês | MEDLINE | ID: mdl-35995921

RESUMO

Space weather phenomena can threaten space technologies. A hazard among these is the population of relativistic electrons in the Van Allen radiation belts. To reduce the threat, artificial processes can be introduced by transmitting very-low-frequency (VLF) waves into the belts. The resulting wave-particle interactions may deplete these harmful electrons. However, when transmitting VLF waves in space plasma, the antenna, plasma, and waves interact in a manner that is not well-understood. We conducted a series of VLF transmission experiments in the radiation belts and measured the power and radiation impedance under various frequencies and conditions. The results demonstrate the critical role played by the plasma-antenna-wave interaction around high-voltage space antennae and open the possibility to transmit high power in space. The physical insight obtained in this study can provide guidance to future high-power space-borne VLF transmitter developments, laboratory whistler-mode wave injection experiments, and the interpretation of various astrophysical and optical phenomena.

5.
J Mech Behav Biomed Mater ; 119: 104497, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33798935

RESUMO

The understanding of the tribological behavior of natural structures has been used as inspiration to design and optimize surfaces for diverse applications in engineering. In the present work, morphological, microstructural, mechanical and tribological characterization of the shed skin of two snake species, namely Boa Red Tail and Python Regius was carried out. Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) analyses showed the existence of deterministic patterns, i.e., ordered arrays of geometrical features at the surface, while Transmission Electron Microscopy (TEM) allowed studying the internal structure and chemical composition of the skin sheds. Nanoindentation measurements showed significant variations in hardness and elastic modulus from the surface to the inner layers of the skin, and pin-on-disc tests revealed anisotropic behavior of the friction coefficient (COF) as a function of the sliding direction against balsa wood in dry conditions. Correlations between the friction data, nano-indentation mechanical properties and subsurface skin structure were established for both species taking into account the ways in which the skins' deterministic patterns influence the tribological performance.


Assuntos
Boidae , Animais , Módulo de Elasticidade , Fricção , Dureza , Microscopia de Força Atômica , Propriedades de Superfície
6.
Int. j. morphol ; 38(3): 677-682, June 2020. graf
Artigo em Inglês | LILACS | ID: biblio-1098306

RESUMO

Given the importance of the Golden kingklip (Genypterus blacodes) as an alternative to the production of salmonid species for worldwide diversification of aquaculture this study researched the morpho-histology of the digestive canal, providing a uniform nomenclature and basic information to support their nutritional management in captive conditions. The objective was to describe the normal morphology of the digestive canal. Twelve wild specimens were collected and dissected. Samples of the esophagus, stomach, liver, pyloric blind and intestines were obtained. An anatomical and histological description was performed. The digestive canal presented a short tubular esophagus, a slightly dilated, J-shaped stomach and thick walls. The stomach had a cardiac region that ended in a pyloric sphincter from which the intestine of thin walls. The intestine presented an anterior, middle and posterior segment. The anterior region of the first segment of the middle intestine presented 4-5 pairs of pyloric cecum. The middle intestine represented approximately 30 % of the total length of the digestive canal, with a smaller diameter compared to the first segment. The posterior intestine was separated from the middle intestine by a thick and powerful sphincter. The liver was large and elongated, and located in the peritoneal cavity located to the left plane and ventral to the swim bladder. The gallbladder was located lateral to the hepatic anterior wolf. The bile duct led to the duodenal region of the anterior intestine. Ventrally, the rectum ended in the anus, located in front of the anal fin. In general, the histological structures were variable according to the segment studied, a mucous tunic was recognized that presented a simple columnar epithelium, a lamina propria composed of loose connective tissue, a muscular layer of the mucosa composed of smooth muscle tissue and a submucosal layer composed of loose connective tissue, a circular and longitudinal stratum of muscular tunic, which had striated musculature and an adventitial tunic composed of a simple squamous epithelium. In conclusion, Golden kingklip (Genypterus blacodes) presents a digestive system typical of a carnivorous benthic fish adapted to feed on fish and crustaceans.


Dada la importancia del Congrio colorado (Genypterus blacodes) como alternativa a la producción de especies salmonídeas para la diversificación mundial de la acuicultura, el objetivo del presente estudio es describir la morfología normal del canal digestivo de esta especie, proporcionando una nomenclatura uniforme e información básica para apoyar su manejo nutricional en condiciones de cautiverio. Doce especímenes silvestres fueron colectados y disecados. Se obtuvo muestras del esófago, estómago, hígado, ciego pilórico e intestinos. Se realizó una descripción anatómica e histológica. El canal digestivo presentó un esófago tubular corto, un estómago ligeramente dilatado, con forma de J y paredes gruesas. El estómago presentaba una región cardíaca que terminaba en un esfínter pilórico desde el cual el intestino de paredes delgadas. El intestino presentaba un segmento anterior, medio y posterior. La región anterior del primer segmento del intestino medio presentó 4-5 pares de ciegos pilóricos. El intestino medio representó aproximadamente el 30 % de la longitud total del canal digestivo, con un diámetro menor en comparación con el primer segmento. El intestino posterior estaba separado del intestino medio por un esfínter grueso y poderoso. El hígado era grande y alargado, y ubicado en la cavidad peritoneal ubicado al plano izquierdo y ventral a la vejiga natatoria. La vesícula biliar se ubicó lateral al lobo anterior hepático. El ducto biliar desembocó en la región duodenal del intestino anterior. Ventralmente, el recto terminó en el ano, ubicado frente a la aleta anal. En general, las estructuras histológicas fueron variables según el segmento estudiado, se reconoció una túnica mucosa que presentaba un epitelio columnar simple, una lámina propia de la mucosa compuesta por tejido conectivo laxo, una capa muscular de la mucosa compuesta por músculo liso tejido y una capa submucosa compuesta de tejido conectivo laxo, un estrato circular y longitudinal de túnica muscular, que tenía musculatura estriada y una túnica adventicia compuesta por un epitelio plano simple. En conclusión, Congrio colorado (Genypterus blacodes) presenta un sistema digestivo típico de un pez bentónico carnívoro adaptado para alimentarse de peces y crustáceos.


Assuntos
Animais , Sistema Digestório/anatomia & histologia , Peixes/anatomia & histologia , Estômago/anatomia & histologia , Intestinos/anatomia & histologia
7.
Clin Transl Oncol ; 22(2): 223-235, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32006340

RESUMO

Thyroid carcinoma is the most frequent endocrine malignancy and accounts for around 3% of global cancer incidence. Different histologies and clinical scenarios make necessary a multidisciplinary approach that includes new diagnostic methods and surgical, radiopharmaceutical and systemic therapies. This guideline updates several aspects of management of thyroid cancer.


Assuntos
Ensaios Clínicos como Assunto/normas , Guias de Prática Clínica como Assunto/normas , Neoplasias da Glândula Tireoide/terapia , Humanos , Oncologia , Sociedades Médicas
8.
J Healthc Qual Res ; 34(2): 66-77, 2019.
Artigo em Espanhol | MEDLINE | ID: mdl-30635250

RESUMO

OBJECTIVES: To identify gaps in patient safety during intra-hospital transfers. MATERIAL AND METHODS: A working group was set up and patient transfers carried out in the different healthcare areas of a hospital were identified. Using the Modal Failure and Effects Analysis (FMEA), the risks of each failure mode identified were quantified using the Risk Prioritisation Index (RPI) and establishing improvement measures for all RPIs with scores greater than 100. RESULTS: There were 31 critical points that could lead to failures / deficiencies in 20 types of transfers. A total of 35 safety improvement measures were proposed for the transfers in the different areas analysed. CONCLUSIONS: The use of FMEA has made it possible to objectify the risks for patient safety during internal hospital transfers by providing information to prioritise improvement strategies.


Assuntos
Análise do Modo e do Efeito de Falhas na Assistência à Saúde , Segurança do Paciente/normas , Transferência de Pacientes/normas , Humanos
10.
Front Physiol ; 9: 1470, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30405431

RESUMO

The polysaccharide heparan sulfate is ubiquitously expressed as a proteoglycan in extracellular matrices and on cell surfaces. In the glomerular filtration barrier, the action of the heparan sulfate is directly related to the function of glomerular filtration, mostly attributed to the sulfated domains that occur along the polysaccharide chain, as evidenced by fact that release of fragments of heparan sulfate by heparanase significantly increases the permeability of albumin passage through the glomerular endothelium, event that originates proteinuria. This review aims to show the importance of the structural domains of heparan sulfate in the process of selective permeability and to demonstrate how these domains may be altered during the glomerular inflammation processes that occur in preeclampsia.

11.
An Sist Sanit Navar ; 41(2): 171-180, 2018 Aug 29.
Artigo em Espanhol | MEDLINE | ID: mdl-30063034

RESUMO

BACKGROUND: Health professionals show a high prevalence of burnout syndrome. This syndrome could be involved in the alteration of higher cognitive functions in the clinical setting. The aim of this study is to evaluate whether burnout is related to the executive functions of inhibition, working memory, decision-making, and cognitive flexibility in palliative care health professionals. METHOD: Degree of burnout was evaluated in seventy-seven health professionals from palliative care units by the Maslach Burnout Inventory (MBI-HSS), while executive functions were evaluated by Stroop test (inhibition), Letter-Number Sequencing (working memory), Iowa Gambling Task (decision-making) and Trail Making Test (cognitive flexibility). The total sample was classified in relation to both degree of burnout (low, medium, high) in each subscale of MBI-HSS (emotional exhaustion, depersonalization, and reduced personal accomplishment), and the number of dimensions altered (high levels in none, one or more than one). RESULTS: Burnout syndrome was present in 54.5% of palliative care health professionals, 15.6% of them with more than one dimension altered; these professionals showed significantly lower scores than professionals without burnout in the Stroop test, the Letter-Number Sequencing and the Iowa Gambling Task. Higher levels of emotional exhaustion and depersonalization were associated with significantly lower scores in the Iowa Gambling Task for assessing decision-making. CONCLUSIONS: The results showed that palliative care health professionals with a higher level of burnout have an alteration of inhibition, working memory and decision-making. These executive functions can be relevant in the clinical setting since they could be related to the cognitive thinking required for correct clinical reasoning by health professionals.


Assuntos
Esgotamento Profissional/epidemiologia , Esgotamento Profissional/psicologia , Tomada de Decisão Clínica , Função Executiva , Cuidados Paliativos , Adulto , Estudos Transversais , Feminino , Humanos , Masculino
12.
Neurologia (Engl Ed) ; 33(7): 419-426, 2018 Sep.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-27645776

RESUMO

INTRODUCTION: Intracranial haemorrhages (ICH) represent a severe and frequently lethal complication in patients treated with vitamin K antagonists (VKA). The purpose of our study is to describe the factors and clinical features associated with mortality in these patients. METHODS: We conducted an observational, retrospective, multi-centre study based on prospective stroke registries in Spain. We included all patients admitted to neurology departments during a one-year period who met the following inclusion criteria: being 18 or older, having a diagnosis of ICH, and receiving VKA. Clinical and radiological parameters and 3-month outcomes were analysed. RESULTS: A total of 235 patients from 21 hospitals were included. Mortality rate at 90 days was 42.6%. Bivariate analysis showed a significant association between death and the following factors: median NIHSS score at admission (5 [IQR = 9] vs 17 [IQR = 14] points, P<.01) and presence of an extensive hemispheric haemorrhage (4.9% vs 35%, P < .01; χ2). Extensive hemispheric haemorrhages, in addition to being the most lethal type, were associated with a shorter time to death (mean of 16.5 days; 95% CI: 7.1-26). A logistic regression model showed that only baseline NIHSS scores independently predicted death (odds ratio=1.13 [95% CI: 1.08-1.17] for each point in the scale). CONCLUSION: ICH in patients treated with VKA is associated with high mortality rates; mortality in these patients is mainly and independently associated with the clinical situation at stroke onset.


Assuntos
Anticoagulantes/efeitos adversos , Hemorragia Cerebral/induzido quimicamente , Hemorragia Cerebral/mortalidade , Vitamina K/antagonistas & inibidores , Adulto , Idoso , Idoso de 80 Anos ou mais , Anticoagulantes/uso terapêutico , Causas de Morte , Feminino , Humanos , Pessoa de Meia-Idade , Prognóstico , Sistema de Registros , Estudos Retrospectivos , Espanha/epidemiologia , Acidente Vascular Cerebral/complicações , Adulto Jovem
13.
An Sist Sanit Navar ; 40(3): 421-431, 2017 Dec 29.
Artigo em Espanhol | MEDLINE | ID: mdl-29215659

RESUMO

BACKGROUND: Palliative care health professionals have reported high levels of burnout. An understanding of factors associated with this syndrome in this population could foster new prevention and intervention strategies. The objectives were to evaluate the levels of burnout in each of its dimensions in a sample of palliative care health professionals and to analyze the relationship between levels of burnout and sociodemographic, occupational and lifestyle characteristics in this sample. METHODS: The total sample was composed of 92 palliative care health professionals. Sociodemographic, occupational and lifestyle characteristics were registered. The levels of burnout syndrome were evaluated by the Maslach Burnout Inventory - Human Services Survey (MBI-HSS). The total sample was divided into three groups, depending on the level of burnout (non-burnout group, burnout group meeting one criterion, and burnout group meeting two or three criteria). Comparisons were performed amongst groups for all characteristics evaluated. RESULTS: The non-burnout professionals were significantly older and slept more than the professionals with more than one altered dimension; in addition, they had greater job seniority in the unit than those with a single altered dimension and did physical exercise more frequently than either of the burnout groups. CONCLUSION: The younger professionals, with more job seniority in the units of palliative care, and less hours of sleep and physical activity showed higher levels of burnout. Therefore, these factors should be considered for enhancing prevention and intervention strategies for these health professionals.


Assuntos
Esgotamento Profissional/epidemiologia , Pessoal de Saúde , Estilo de Vida , Ocupações , Cuidados Paliativos , Adulto , Estudos Transversais , Demografia , Feminino , Humanos , Masculino , Fatores Sociológicos
14.
Nat Commun ; 7: 13857, 2016 12 15.
Artigo em Inglês | MEDLINE | ID: mdl-27976747

RESUMO

The spin-orbit coupling relating the electron spin and momentum allows for spin generation, detection and manipulation. It thus fulfils the three basic functions of the spin field-effect transistor. However, the spin Hall effect in bulk germanium is too weak to produce spin currents, whereas large Rashba effect at Ge(111) surfaces covered with heavy metals could generate spin-polarized currents. The Rashba spin splitting can actually be as large as hundreds of meV. Here we show a giant spin-to-charge conversion in metallic states at the Fe/Ge(111) interface due to the Rashba coupling. We generate very large charge currents by direct spin pumping into the interface states from 20 K to room temperature. The presence of these metallic states at the Fe/Ge(111) interface is demonstrated by first-principles electronic structure calculations. By this, we demonstrate how to take advantage of the spin-orbit coupling for the development of the spin field-effect transistor.

15.
Nat Mater ; 15(12): 1261-1266, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27571452

RESUMO

The spin-orbit interaction couples the electrons' motion to their spin. As a result, a charge current running through a material with strong spin-orbit coupling generates a transverse spin current (spin Hall effect, SHE) and vice versa (inverse spin Hall effect, ISHE). The emergence of SHE and ISHE as charge-to-spin interconversion mechanisms offers a variety of novel spintronic functionalities and devices, some of which do not require any ferromagnetic material. However, the interconversion efficiency of SHE and ISHE (spin Hall angle) is a bulk property that rarely exceeds ten percent, and does not take advantage of interfacial and low-dimensional effects otherwise ubiquitous in spintronic hetero- and mesostructures. Here, we make use of an interface-driven spin-orbit coupling mechanism-the Rashba effect-in the oxide two-dimensional electron system (2DES) LaAlO3/SrTiO3 to achieve spin-to-charge conversion with unprecedented efficiency. Through spin pumping, we inject a spin current from a NiFe film into the oxide 2DES and detect the resulting charge current, which can be strongly modulated by a gate voltage. We discuss the amplitude of the effect and its gate dependence on the basis of the electronic structure of the 2DES and highlight the importance of a long scattering time to achieve efficient spin-to-charge interconversion.

16.
Phys Rev Lett ; 116(9): 096602, 2016 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-26991190

RESUMO

We present results on spin to charge current conversion in experiments of resonant spin pumping into the Dirac cone with helical spin polarization of the elemental topological insulator (TI) α-Sn. By angle-resolved photoelectron spectroscopy (ARPES), we first check that the Dirac cone (DC) at the α-Sn (0 0 1) surface subsists after covering Sn with Ag. Then we show that resonant spin pumping at room temperature from Fe through Ag into α-Sn layers induces a lateral charge current that can be ascribed to the inverse Edelstein effect by the DC states. Our observation of an inverse Edelstein effect length much longer than those generally found for Rashba interfaces demonstrates the potential of TIs for the conversion between spin and charge in spintronic devices. By comparing our results with data on the relaxation time of TI free surface states from time-resolved ARPES, we can anticipate the ultimate potential of the TI for spin to charge conversion and the conditions to reach it.


Assuntos
Modelos Teóricos , Estanho/química , Ferro/química , Espectroscopia Fotoeletrônica/métodos , Prata/química , Temperatura
17.
J Phys Condens Matter ; 28(16): 165801, 2016 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-26988255

RESUMO

We report on the spin transport properties in p-doped germanium (Ge-p) using low temperature magnetoresistance measurements, electrical spin injection from a ferromagnetic metal and the spin pumping-inverse spin Hall effect method. Electrical spin injection is carried out using three-terminal measurements and the Hanle effect. In the 2-20 K temperature range, weak antilocalization and the Hanle effect provide the same spin lifetime in the germanium valence band (≈1 ps) in agreement with predicted values and previous optical measurements. These results, combined with dynamical spin injection by spin pumping and the inverse spin Hall effect, demonstrate successful spin accumulation in Ge. We also estimate the spin Hall angle θ(SHE) in Ge-p (6-7 x 10(-4) at room temperature, pointing out the essential role of ionized impurities in spin dependent scattering.

18.
Maturitas ; 83: 65-71, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26546077

RESUMO

OBJECTIVE: To perform an external validation of FRAX algorithm thresholds for reporting level of risk of fracture in Spanish women (low < 5%; intermediate ≥ 5% and < 7.5%; high ≥ 7.5%) taken from a prospective cohort "FRIDEX". METHODS: A retrospective study of 1090 women aged ≥ 40 and ≤ 90 years old obtained from the general population (FROCAT cohort). FRAX was calculated with data registered in 2002. All fractures were validated in 2012. Sensitivity analysis was performed. RESULTS: When analyzing the cohort (884) excluding current or past anti osteoporotic medication (AOM), using our nominated thresholds, among the 621 (70.2%) women at low risk of fracture, 5.2% [CI95%: 3.4-7.6] sustained a fragility fracture; among the 99 at intermediate risk, 12.1% [6.4-20.2]; and among the 164 defined as high risk, 15.9% [10.6-24.2]. Sensitivity analysis against model risk stratification FRIDEX of FRAX Spain shows no significant difference. By including 206 women with AOM, the sensitivity analysis shows no difference in the group of intermediate and high risk and minimal differences in the low risk group. CONCLUSIONS: Our findings support and validate the use of FRIDEX thresholds of FRAX when discussing the risk of fracture and the initiation of therapy with patients.


Assuntos
Algoritmos , Fraturas por Osteoporose/epidemiologia , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Estudos Retrospectivos , Medição de Risco , Fatores de Risco , Espanha/epidemiologia
19.
Data Brief ; 4: 606-13, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26322327

RESUMO

The transcription factor (TF) Snail1 is a major inducer of the epithelial-mesenchymal transition (EMT) during embryonic development and cancer progression. Ectopic expression of Snail in murine mesenchymal stem cells (mMSC) abrogated their differentiation to osteoblasts or adipocytes. We used either stable isotopic metabolic labeling (SILAC) for 3T3-L1 cells or isobaric labeling with tandem mass tags (TMT) for mMSC stably transfected cells with Snail1 or control. We carried out a proteomic analysis on the nuclear fraction since Snail is a nuclear TF that mediates its effects mainly through the regulation of other TFs. Proteomics data have been deposited in ProteomeXchange via the PRIDE partner repository with the dataset identifiers PXD001529 and PXD002157 (Vizcaino et al., 2014) [1]. Data are associated with a research article published in Molecular and Cellular Proteomics (Pelaez-Garcia et al., 2015) [2].

20.
J Phys Condens Matter ; 27(32): 326002, 2015 Aug 19.
Artigo em Inglês | MEDLINE | ID: mdl-26213808

RESUMO

We have carried out measurements of domain wall dynamics in a Pt/Co/GdOx(t) wedge sample with perpendicular magnetic anisotropy. When driven by an easy-axis field Hz in the presence of an in-plane field Hx, the domain wall propagation is different along [Formula: see text]x, as expected for samples presenting Dzyaloshinskii-Moriya (DMI) interaction. In the creep regime, the sign and the value of the domain wall velocity asymmetry changes along the wedge. We show that in our samples the domain wall speed versus Hx curves in the creep regime cannot be explained simply in terms of the variation of the domain wall energy with Hx, as suggested by previous works. For this reason the strength and the sign of the DMI cannot be extracted from these measurements. To obtain reliable information on the DMI strength using magnetic field-induced domain wall dynamics, measurements have been performed with high fields, bringing the DW close to the flow regime of propagation. In this case we find large values of the DMI, consistent in magnitude and sign with those obtained from Brillouin light scattering measurements.

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