Propuesta de valoración de la condición biológica en jugadoras Sub-13 de la Comunidad de Madrid

En el presente trabajo, las jugadoras de fútbol de la categoría Sub-13 fueron sometidas a diferentes pruebas de valoración a lo largo de la temporada 2013/2014 con el objetivo de determinar su condición biológica y además, conocer la evolución de su rendimiento deportivo y de su salud. Para dar cumplimiento a estos objetivos, se plantearon una serie de pruebas que permitiesen valorar la condición motora y fisiológica. Siguiendo ese orden, fueron medidas utilizando el Yo-Yo Intermittent Recovery Test 1 (resistencia), Counter Movement Jump (fuerza explosiva), test de velocidad de 30 metros lanzados, Zig-Zag Run Test (agilidad) y goniometría de cadera (flexibilidad). La muestra estuvo conformada por 11 niñas que practican fútbol durante 1 hora 2 días a la semana y con rangos de edad entre 12 y 13 años

High temperature corrosion behavior on molten nitrate salt-based nanofluids for CSP plants

Recently, a number of theoretical and experimental studies have been performed to understand the effect of nanoparticles on thermal properties and heat transfer performance but there is a lack regarding their corrosion properties. In this work, an extended corrosion characterization (at central tower plant storage temperature (565 °C)) has been carried out in two different grades of solar salt (industrial and refined purity) doped with the addition of 1 wt% Al2O3 nanoparticles or 1 wt% SiO2 nanoparticles. Corrosion rates were determined in commercial stainless steel commonly used in CSP technology (347SS) by gravimetric tests, measuring the weight gain during 1000 h, identifying the corrosion products by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD). The lowest corrosion rate (0.007 mm/year) was obtained in the refined solar salt with the addition of 1 wt% Al2O3 nanoparticles. A protective layer was formed in the steel-salt interphase, identified through XRD as Al2O3.The authors would like to acknowledge the financial support provided by CONICYT/FONDAP 15110019 “Solar Energy Research Center” SERC-Chile. The authors wish to acknowledge the Univer- sity of the Basque Country UPV/EHU for supporting the PhD of Belen Munoz-Sanchez (Zabalduz program) and her research stay at the Universidad de Antofagasta

Changes in the relationships between aerobic capacity and hematological variables after a diet and exercise intervention.

Relación entre los cambios de las variable hematolóicas y la capacidad aeróbic

The influence of mixing water on the thermophysical properties of nanofluids based on solar salt and silica nanoparticles

The use of nanofluids (NFs) based on Solar Salt (SS) and nanoparticles (NPs), either as Thermal Energy Storage (TES) material or as Heat Transfer Fluid (HTF), is attracting great interest in recent years. Many authors [1,3] have reported important improvements on the thermophysical properties (specific heat capacity cp,thermal conductivity k) of NFs based on SS and ceramic NPs. These improvements would lead to important savings and better performance of TES facilities on new Concentrated Solar Power (CSP) plants due to lower quantities of material required and smaller storage tanks. To achieve these advantageous features in the final NFs, it is essential to avoid NP agglomeration during their preparation. Different synthesis procedures have been reported: mixing of solid NPs within a SS solution by means of ultrasounds [1-3], direct mixing of solid NPs and molten salt [4]. In this work, NFs based on SS and 1% by wt. of silica NPs were synthetized from a SS-water solution and a commercial water-silica NF called Ludox HS 30% (Sigma-Aldrich). The influence of the mixing water volume (MW) on the cp of NFs was evaluated. With this aim, the cp of these samples was measured by Differential Scanning Calorimetry (DSC) both in the solid and the liquid state. In addition, the distribution of sizes was measured during the whole preparation process by Dynamic Light Scattering (DLS). Further information about sizes and uniformity of the final NFs was obtained from Scanning Electron Microscopy (SEM) images. X-ray Diffraction (XRD) patterns of the SS and final NF were performed.Basque Government's ETORTEK 201

Preparation of nanofluids based on solar salt and boehmite nanoparticles: Characterization of starting materials

A nanofluid composed of Solar Salt (SS) and boehmite nanoparticles (A) in a concentration of 1% by weight, is proposed as thermal storage medium for Concentrated Solar Power (CSP) plants. A wide characterization of the raw materials has been done, focused on their thermal stability and the nanoparticle primary size and shape among other properties such as its specific heat and crystalline structure. Some features of the final nanofluids have been also investigated: thermal stability, nanoparticle sizes and their distribution and specific heat. The showed results confirm that these materials are thermally stable in the working temperature range both individually and combined. In addition, the synthesis procedure implemented is effective to keep the nanoparticle sizes in the nanometric range (<100 nm). These findings mean the first step to carry on research and characterization of this nanofluid.Basque Government's ETORTEK 201

Can the exercise mode determine lipid profile improvements in obese patients?

Influencia del modo de ejercicio sobre el perfil lipídic

Differences in Activated Partial Thromboplastin Time (APTT) measures depending on the device used in blood samples drawn (direct Vacutainer® versus Butterfly needle): A Randomized Comparative Study

 Background. Most laboratory errors occur during the pre-analytical phase and are often related to the blood drawn equipment. No studies have evaluated yet the influence of the most common vein puncture devices on activated partial thromboplastin time (APTT). We aimed to compare APTT when venous blood samples are drawn with two different needle devices (direct Vacutainer® versus butterfly needle). Methods. Consecutive adult healthy volunteers were prospectively enrolled and assigned to receive two antecubital peripheral blood punctures from both arms, using the two devices. The blood drawn sequence (i.e. right or left arm first) and the first device to be used (i.e. direct vacuntainer® or butterfly needle first) were randomly established.Results. Forty healthy volunteers (mean age 42.9 years; SD 7.5; range 27-58), comprising 25 (62.5%) women, were recruited. APTT obtained with the two blood drawn devices significantly and positive correlated (Spearman rho=0.943; p&lt;0.001). However, mean APTT was significantly more prolonged in blood samples drawn with butterfly needles than in those obtained with direct vacutainer® (34.01 ± 4.4 vs. 33.63 ± 3.8 seconds, respectively; p=0.013). No differences in APTT were found when samples obtained from right and left arms were compared.Discussion. The type of blood drawn equipment significantly influences APTT, which is prolonged when a butterfly needle is used. An increased contact time between blood and butterfly tube plastic material would favor a premature consumption of plasma coagulation factors before mixing with anticoagulants in the collection tube. The appropriately chosen blood drawn device is thus essential to avoid pre-analytical errors.KEY WORDS: Activated partial thromboplastin time, Phlebotomy; Quality control; Blood Specimen Collection; Pre-analytical quality; Laboratory techniques and procedure

Prevalence of missed lesions in patients with inadequate bowel preparation through a very early repeat colonoscopy

Adenoma; Colonoscòpia; TumorsAdenoma; Colonoscopy; Colonic neoplasmsAdenoma; Colonoscopia; Neoplasias del colonObjectives: When bowel preparation (BP) is inadequate, international guidelines recommend repeating the colonoscopy within 1 year to avoid missing clinically relevant lesions. We aimed to determine the rate of missed lesions in patients with inadequate BP through a very early repeat colonoscopy with adequate BP. Methods: Post hoc analysis was conducted using data collected from a prospective multicenter randomized clinical trial including patients with inadequate BP and then repeat colonoscopy. Inadequate BP was defined as the Boston Bowel Preparation Scale (BBPS) score <2 points in any segment. We included patients with any indication for colonoscopy. The adenoma detection rate (ADR), advanced ADR (AADR), and serrated polyp detection rate (SPDR) were calculated for index and repeat colonoscopies. Results: Of the 651 patients with inadequate BP from the original trial, 413 (63.4%) achieved adequate BP on repeat colonoscopy. The median interval between index and repeat colonoscopies was 28 days. On repeat colonoscopy, the ADR was 45.3% (95% confidence interval [CI] 40.5-50.1%), the AADR was 10.9% (95% CI 8.1-14.3%), and the SPDR was 14.3% (95% CI 10.9-17.7%). Cancer was discovered in four patients (1%; 95% CI 0.2-2.5%). A total of 60.2% of all advanced adenoma (AA) were discovered on repeat colonoscopy. A colon segment scored BBPS = 0 had most AA (66.1%) and all four cancers. Conclusion: Patients with inadequate BP present a high rate of AAs on repeat colonoscopy. When a colonoscopy has a colon segment score BBPS = 0, we recommend repeating the colonoscopy as soon as possible

Sociodemographic and clinical profile of long COVID-19 patients, and its correlation with medical leave: a comprehensive descriptive and multicenter study

The persistent condition of COVID-19 is characterized by a wide range of symptoms that have had a significant impact on both the health status and occupational life of the population. In this observational and multicenter study, the relationship between the sociodemographic and clinical profile of Spanish patients diagnosed with long COVID, and the work-related disability resulting from this pathology was analyzed. The analysis included 689 responses. A descriptive analysis of the variables recorded was performed, together with a bivariate analysis to determine associations between work-related disability and variables such as gender, age, health status, disabling symptoms or comorbidities. The results obtained highlight fatigue and lack of concentration (brain fog) as the most incapacitating symptoms among patients diagnosed with long COVID. Multivariate analysis revealed that time since diagnosis (OR: 0.57, CI95%: 0.36–0.89, p: 0.013), concomitant renal insufficiency (OR: 4.04, CI95%: 1.42–11.4, p: 0.008), and symptoms like fatigue (OR: 0.56, CI95%: 0.33–0.99) and tremors (OR: 2.0, CI95%: 1.06–3.69, p: 0.029), were associated with work-related disability. These findings highlight the need to improve the health and work-related management of this condition in the healthcare system. Besides risk factor control, it is suggested to pay special attention to determining the appropriate timing of medical leave work reintegration, along with coordination between primary care and occupational health services to ensure the gradual and tailored return of patients with long COVID to the workforce

Effects of dietary restriction combined with different exercise programs or physical activity recommendations on blood lipids in overweight adults

Background and aim: Many exercise studies, although generally showing the beneficial effects of supervised aerobic, resistance or combined exercise on blood lipids, have sometimes reached equivocal conclusions. The aim of this study is to evaluate the impact of different programs that combined exercise and dietary restriction on blood lipids versus a clinical practice intervention for weight loss, in overweight adults. Methods: For this study 66 subjects participated in a supervised 22 weeks training program, composed of three sessions per week and they were randomized in three groups: strength training (S; n = 19), endurance training (E; n = 25), a combination of E and S (SE; n = 22). Eighteen subjects served as physical activity group (PA) that followed a clinical intervention consisted of physical activity recommendations. All groups followed the same dietary treatment, and blood samples were obtained for lipids measurements, at the beginning and end of the study. Results: Lipid profile improved in all groups. No significant differences for baseline and post-training values were observed between groups. In general, SE and PA decreased low-density lipoprotein cholesterol (LDL-C) values (p menor que 0.01). S decreased triglyceride levels (p menor que 0.01) and E, SE, and PA decreased total cholesterol levels (p menor que 0.05, p menor que 0.01 and p menor que 0.01, respectively). Conclusions: These results suggest that an intervention program of supervised exercise combined with diet restriction did not achieved further improvements in blood lipid profile than diet restriction and physical activity recommendations, in overweight adults. (Clinical Trials gov number: NCT01116856)