Experimental characterization, modelling and compensation of temperature effects in optotunable lenses

15 pags., 10 figs., 1 tab.Most tunable lenses (TLs) are affected by deviations in optical power induced by external temperature changes or due to internal heating while in use. This study proposes: (1) An experimental characterization method to evaluate the magnitude of the optical power deviations due to internal temperature shifts; (2) three different mathematical models (experimental, polynomial, and optimized) to describe the response of the lens with temperature; (3) predictions of the internal temperature shifts while using the lens in time frames of minutes, seconds, and milliseconds and; (4) a real time optical power compensation tool based on the implementation of the models on a custom voltage electronic driver. The compensation methods were successfully applied to two TL samples in static and dynamic experiments and in hysteresis cycles. After 40 min at a static nominal power of 5 diopters (dpt), the internal temperature exponentially increased by 17 °C, producing an optical power deviation of 1.0 dpt (1.5 dpt when the lens cools down), representing a 20% distortion for heating and 30% for cooling. Modelling and compensation reduced the deviations to 0.2 dpt when heating (0.35 dpt when cooling) and the distortions to 4% and 7%. Similar levels of improvement were obtained in dynamic and hysteresis experiments. Compensation reduced temperature effects by more than 75%, representing a significant improvement in the performance of the lens.XB and IM acknowledge fnancial support from Comunidad de Madrid Doctorado Industrial IND2017/ BMD-7670

Producción de heteropolisacáridos por cepas de Lactobacillus aisladas de sidra

Comunicación presentadas en la 6ª reunión de la Red temática BAL (Participación de las Bacterias Lácticas en la Salud Humana y en la Calidad Alimentaria), celebrada el 28 y 29 de junio de 2012 en Tarragona.Peer Reviewe

Disclosing diversity of exopolysaccharide-producing lactobacilli from Spanish natural ciders

24 p.-2 fig.-2 tab.-1 fig. supl.-1 tab.supl.Lactic acid bacteria (LAB) are naturally occurring bacterial populations in traditional cider from the Basque Country (Spain), which is spontaneously fermented without starters. Some LAB are able to produce exopolysaccharides (EPS) thus causing viscosity, a cider spoilage called “ropiness” or “oilness”. A total of 41 isolates recovered between 1992 and 2009 from ropy ciders of different cider factories were included in the present study. Identification by 16S rRNA gene sequencing, biochemical traits (API), RAPD-PCR using four universal primers (M13, M13V, P1 and P2) and 16S-23S ISRs amplification profiles revealed that the spoiler species were L. collinoides, L. diolivorans, L. sicerae and L. suebicus. EPS production in L. collinoides and L. sicerae strains approached by PCR amplification of eps genes encoding for homopolysaccharide and heteropolysaccharide revealed that these strains synthesize heteropolysacccharides and in addition, L. collinoides CUPV231 synthesizes a 2-branched (1,3)-β-D-glucan. The molecular weight of their EPS determined by HP-SEC revealed the presence of three polymers with average molecular weights (MW) of around 106 g/mol, 104 g/mol and 103 g/mol. The middle-weight fraction was the most abundant except in L. sicerae CUPV261 which mainly produced the high Mw polymer.This study was supported by grants AGL2012-40084-C03 (co-funded by FEDER), AGL2015-65010-C3-1-R, IT866-13 from the Basque Government and PROMETEO/2012/040 from the Generalitat Valenciana.Peer reviewe

Efectos de la contaminación atmosférica sobre piedra arenisca de la Diputación provincial de Gipuzkoa

Cartel presentado en la XXX Reunión Científica del Grupo de Cromatografía y Técnicas Afines - GCTA 2001 Burjassot, Valéncia, 18 a 20 de Abril de 2001Peer Reviewe

Risk of diabetes in patients with sleep apnea: comparison of surgery versus CPAP in a long-term follow-up study

This study aimed to obtain a comprehensive view of the risk of developing diabetes in patients with obstructive sleep apnea (OSA) and to compare this risk between patients receiving continuous positive airway pressure (CPAP) therapy versus upper airway surgery (UAS). We used local and the global-scale federated data research network TriNetX to obtain access to electronic medical records, including those for patients diagnosed with OSA, from health-care organizations (HCOs) worldwide. Using propensity score matching and the score-matched analyses of data for 5 years of follow-up, we found that patients who had undergone UAS had a lower risk of developing diabetes than those who used CPAP (risk ratio 0.415, 95% confidence interval (CI) 0.349-0.493). The risk for newly diagnosed diabetes patients showed a similar pattern (hazard ratio 0.382; 95% CI 0.317-0.459). Both therapies seem to protect against diabetes (Risk 0.081 after UAS vs. 0.195 after CPAP). Analysis of the large data sets collected from HCOs in Europe and globally lead us to conclude that, in patients with OSA, UAS can prevent the development of diabetes better than CPAP