“Male effect” and “temporary weaning” in synchronization of post-partum ovarian activity in Pelibuey ewes

To evaluate the response of the “male effect” and “temporary weaning” on the synchronization of post-partum ovarian activity in Pelibuey ewes, an experiment was carried out using 78 Pelibuey ewes with suckling lambs. The ewes were separated from their offspring for 48 hours and randomly assigned to one of four treatments derived from the arrangement of two factors, “male effect” and “temporary weaning”, each at two levels. Treatments were: T1 (n = 20) control ewes, without “male effect” and without “temporary weaning”); T2 (n = 19) ewes without “male effect” and with “temporary weaning”; T3 (n = 20) ewes with “male effect” and without “temporary weaning”; and T4 (n = 19), ewes with “male effect” and with “temporary weaning”. The response to oestrus, return to oestrus, gestation rate and lambing rate were analysed using logistic regression. The onset of oestrus was analysed using survival curves. No significant differences were found for lambing rate and prolificacy among treatments. “Temporary weaning” (T2) and “male effect” (T3) did not influence the response to oestrus, rate and duration of return to oestrus, or gestation rate and fertility, and was similar to the control group (T1). The interaction of “male effect” with “temporary weaning” (T4) increased the response to oestrus, reduced the rate and duration of return to oestrus, and the gestation rate, but increased fertility. Synchronizing post-partum ovarian activity with “male effect” and “temporary weaning” reduces the onset of oestrus and the rate of return to oestrus, but increases the response to oestrus and fecundity in Pelibuey ewes.Keywords: Biostimulation, progestogens, prolificacy, prostaglandins, sucklin

Effects of the type of exercise performed on the vibration delivered during whole-body vibration exercises

While the internal load factors of whole-body vibration training have been widely investigated, the study of external load magnitude has been overlooked. Thus, the aim of the present study was to evaluate differences in whole-body vibration stimulus magnitude between static/dynamic whole-body vibration training at various vibration conditions. Four Pro 5 Plate vibration platforms were exposed to twelve different vibration conditions and a triaxial USB Impact X250-2 accelerometer was used to measure platform acceleration during each condition. Paired samples t-test was calculated to evaluate differences among amplitude, frequency, time of acceleration and time of deceleration of each platform at each vibration condition and during static (squat of 90° knee flexion) or dynamic exercise (from stand to 90° knee flexion squat). Also, the intra-class correlation coefficients were examined in order to assess the inter-instrument reliability. Peak-to-peak amplitude, frequency, time of acceleration and deceleration of the vibration platform were not modified by the type of exercise performed. Moreover, the four platforms tested showed high repeatability values during the execution of free vibration, static or dynamic squat in all vibration conditions. This study confirms that the vibration delivered by the Pro 5 Plate vibration platform is not modified during the realization of static or dynamic exercises

Hombres en cuidado. Narraciones de cuidadores masculinos informales en Valencia

Presentamos los resultados de una investigación inédita en el marco territorial de la Comunidad Valenciana. Ésta se desarrolló por la Universidad de Valencia, desde agosto de 2016 y hasta un año después, con financiación del Ayuntamiento de Valencia La investigación pretendía observar como perciben su propio rol de cuidador, los hombres que desarrollan habitualmente esta función de manera informal en su entorno familiar. De igual modo, conocer cuáles son los factores psico-sociales que comprende la acción de cuidar y qué consecuencias positivas puede reportarles la atención a personas en situación de dependencia. Así, se ha podido comprobar como, a pesar de que los hombres utilizan con mayor asiduidad los resursos y servicios (tanto públicos como privados) disponibles; también es cierto que el cuidado reporta un valor tanto al individuo que lo ejerce como al que lo recibe; y constituye un beneficio evidente al colectivo (economía del cuidado).We present the results of an unpublished research in the territorial framework of the Valencian Community. This was developed by the University of Valencia, from August 2016 and until a year later, with funding from the City of Valencia The research sought to observe how they perceive their own role as caretaker, the men who habitually develop this function in an informal way in their family environment. In the same way, to know the psycho-social factors that understand the action of caring and what positive consequences can be reported to people in a situation of dependence. Thus, it has been possible to see how, although men use more assiduously the Resursos and services (both public and private) available; It is also true that care reports a value both to the individual who exerts it and to the one who receives it; And it constitutes an obvious benefit to the collective (economy of the care)

Manufacture of Carbon Materials with High Nitrogen Content

Nowadays one of the biggest challenges for carbon materials is their use in CO2 capture and their use as electrocatalysts in the oxygen reduction reaction (ORR). In both cases, it is necessary to dope the carbon with nitrogen species. Conventional methods to prepare nitrogen doped carbons such as melamine carbonization or NH3 treatment generate nitrogen doped carbons with insufficient nitrogen content. In the present research, a series of activated carbons derived from MOFs (ZIF-8, ZIF-67) are presented. Activated carbons have been prepared in a single step, by pyrolysis of the MOF in an inert atmosphere, between 600 and 1000 °C. The carbons have a nitrogen content up to 20 at.% and a surface area up to 1000 m2/g. The presence of this nitrogen as pyridine or pyrrolic groups, and as quaternary nitrogen are responsible for the great adsorption capacity of CO2, especially the first two. The presence of Zn and Co generates very different carbonaceous structures. Zn generates a greater porosity development, which makes the doped carbons ideal for CO2 capture. Co generates more graphitized doped carbons, which make them suitable for their use in electrochemistry.Authors acknowledge financial support by MINECO (Spain) through the project MAT2017-86992-R and “Ministerio de Ciencia e Innovación” (PID2020-116998RB-I00)

Proyecto de emprendimiento para revolucionar el concepto del servicio en lavandería

El proyecto surgió a partir de la aplicación de una técnica llamada ideación1, en la cual se realizó como primera actividad una lluvia de ideas para identificar los problemas o necesidades que tiene el común de la gente y que, desde nuestro punto de vista, valía la pena explorar. Una vez identificados estos problemas se realizó un proceso de votación para identificar aquellos que tuviesen una mayor relevancia. Identificados los dos problemas de mayor impacto se optó por elegir uno de ellos para adoptarlo, validarlo y diseñar una propuesta de solución innovadora planteándola como un modelo de negocio base con el que dicha solución pudiera operar en el mercado. Este proceso nos dio aprendizaje y conocimiento de las metodologías Lean startup y Customer development2, que nos permiten evaluar un problema en campo, utilizando como principal herramienta la entrevista y la observación, con la finalidad de poder validar si el problema planteado se percibe como una oportunidad de negocio y si puede ser atractiva, al grado de trabajar en ella para atacarla frontalmente y así ofrecer una solución factible que permita solventar esta necesidad para luego validarla buscando identificar el valor percibido del cliente ante la solución planteada, con la intención final de saber si el cliente tendría la intención de usarla y si estaría dispuesto a pagar por ella. C. Palabras clave Ideación, El proyecto surgió a partir de la aplicación de una técnica llamada ideación1 , en la cual se realizó como primera actividad una lluvia de ideas para identificar los problemas o necesidades que tiene el común de la gente y que, desde nuestro punto de vista, valía la pena explorar. Una vez identificados estos problemas se realizó un proceso de votación para identificar aquellos que tuviesen una mayor relevancia. Identificados los dos problemas de mayor impacto se optó por elegir uno de ellos para adoptarlo, validarlo y diseñar una propuesta de solución innovadora planteándola como un modelo de negocio base con el que dicha solución pudiera operar en el mercado. Este proceso nos dio aprendizaje y conocimiento de las metodologías Lean startup y Customer development2 , que nos permiten evaluar un problema en campo, utilizando como principal herramienta la entrevista y la observación, con la finalidad de poder validar si el problema planteado se percibe como una oportunidad de negocio y si puede ser atractiva, al grado de trabajar en ella para atacarla frontalmente y así ofrecer una solución factible que permita solventar esta necesidad para luego validarla buscando identificar el valor percibido del cliente ante la solución planteada, con la intención final de saber si el posible cliente de esta solución tendría la intención de usarla y si estaría dispuesto a pagar por ella.ITESO, A.C

Validity of the polar h7 heart rate sensor for heart rate variability analysis during exercise in different age, body composition and fitness level groups

This work aims to validate the Polar H7 heart rate (HR) sensor for heart rate variability (HRV) analysis at rest and during various exercise intensities in a cohort of male volunteers with different age, body composition and fitness level. Cluster analysis was carried out to evaluate how these phenotypic characteristics influenced HR and HRV measurements. For this purpose, sixty-seven volunteers performed a test consisting of the following consecutive segments: sitting rest, three submaximal exercise intensities in cycle-ergometer and sitting recovery. The agreement between HRV indices derived from Polar H7 and a simultaneous electrocardiogram (ECG) was assessed using concordance correlation coefficient (CCC). The percentage of subjects not reaching excellent agreement (CCC > 0.90) was higher for high-frequency power (PHF) than for low-frequency power (PLF) of HRV and increased with exercise intensity. A cluster of unfit and not young volunteers with high trunk fat percentage showed the highest error in HRV indices. This study indicates that Polar H7 and ECG were interchangeable at rest. During exercise, HR and PLF showed excellent agreement between devices. However, during the highest exercise intensity, CCC for PHF was lower than 0.90 in as many as 60% of the volunteers. During recovery, HR but not HRV measurements were accurate. As a conclusion, phenotypic differences between subjects can represent one of the causes for disagreement between HR sensors and ECG devices, which should be considered specifically when using Polar H7 and, generally, in the validation of any HR sensor for HRV analysis

Near-infrared spectroscopy in NGC 7538

The characterisation of the stellar population toward young high-mass star-forming regions allows to constrain fundamental cluster properties like distance and age. These are essential when using high-mass clusters as probes to conduct Galactic studies. NGC 7538 is a star-forming region with an embedded stellar population only unearthed in the near-infrared. We present the first near-infrared spectro-photometric study of the candidate high-mass stellar content in NGC 7538. We obtained H and K spectra of 21 sources with both the multi-object and long-slit modes of LIRIS at the WHT, and complement these data with sub-arcsecond JHKs photometry of the region using the imaging mode of the same instrument. We find a wide variety of objects within the studied stellar population of NGC 7538. Our results discriminate between a stellar population associated to the HII region, but not contained within its extent, and several pockets of more recent star formation. We report the detection of CO bandhead emission toward several sources as well as other features indicative of a young stellar nature. We infer a spectro-photometric distance of 2.7+-0.5 kpc, an age spread in the range 0.5-2.2 Myr and a total mass ~1.7x10^3 Msun for the older population.Comment: 11 pages, 8 figures, 1 table, accepted by A&

U B V R I Photometry of Stellar Structures throughout the Disk of the Barred Galaxy NGC 3367

We report new detailed surface U, B, V, R, and I photometry of 81 stellar structures in the disk of the barred galaxy NGC 3367. The images show many different structures indicating that star formation is going on in the most part of the disk. NGC 3367 is known to have a very high concentration of molecular gas distribution in the central regions of the galaxy and bipolar synchrotron emission from the nucleus with two lobes (at 6 kpc) forming a triple structure similar to a radio galaxy. We have determined the U, B, V, R, and I magnitudes and U - B, B - V, U - V, and V - I colors for the central region (nucleus), a region which includes supernovae 2003 AA, and 79 star associations throughout NGC 3367. Estimation of ages of star associations is very difficult due to several factors, among them: filling factor, metallicity, spatial distribution of each structure and the fact that we estimated the magnitudes with a circular aperture of 16 pixels in diameter, equivalent to $6''.8\sim1.4$ kpc. However, if the colors derived for NGC 3367 were similar to the colors expected of star clusters with theoretical evolutionary star tracks developed for the LMC and had a similar metallicity, NGC 3367 show 51 percent of the observed structures with age type SWB I (few tens of Myrs), with seven sources outside the bright surface brightness visible disk of NGC 3367.Comment: Accepted for publication (abr 2007) in The Astronomical Journal (July 2007 issue

Glycoprotein Ib activation by thrombin stimulates the energy metabolism in human platelets

<div><p>Thrombin-induced platelet activation requires substantial amounts of ATP. However, the specific contribution of each ATP-generating pathway <i>i</i>.<i>e</i>., oxidative phosphorylation (OxPhos) versus glycolysis and the biochemical mechanisms involved in the thrombin-induced activation of energy metabolism remain unclear. Here we report an integral analysis on the role of both energy pathways in human platelets activated by several agonists, and the signal transducing mechanisms associated with such activation. We found that thrombin, Trap-6, arachidonic acid, collagen, A23187, epinephrine and ADP significantly increased glycolytic flux (3–38 times <i>vs</i>. non-activated platelets) whereas ristocetin was ineffective. OxPhos (33 times) and mitochondrial transmembrane potential (88%) were increased only by thrombin. OxPhos was the main source of ATP in thrombin-activated platelets, whereas in platelets activated by any of the other agonists, glycolysis was the principal ATP supplier. In order to establish the biochemical mechanisms involved in the thrombin-induced OxPhos activation in platelets, several signaling pathways associated with mitochondrial activation were analyzed. Wortmannin and LY294002 (PI3K/Akt pathway inhibitors), ristocetin and heparin (GPIb inhibitors) as well as resveratrol, ATP (calcium-release inhibitors) and PP1 (Tyr-phosphorylation inhibitor) prevented the thrombin-induced platelet activation. These results suggest that thrombin activates OxPhos and glycolysis through GPIb-dependent signaling involving PI3K and Akt activation, calcium mobilization and protein phosphorylation.</p></div