Desarrollo e implementación de un perfilómetro óptico por triangulación láser

Profilometers are instruments commonly used in surface metrology tasks. These instruments play a key role in the industry, such as in manufacturing and quality assurance. However, conventional profilometry techniques require direct contact with the object. In this work, we developed a practical and low-cost optical profilometer for contactless profilometry. The proposed profilometer is based on a laser triangulation system. A laser spot is projected onto the surface of an object, which is captured by a camera. The images are processed to detect the laser spot's location and obtain the object's surface height through calibration. We designed and built the translation stage to process the object's surface. Finally, encouraging results show that the profilometer provides high accuracy with fast acquisition. © 2020 IEEE

Modeling a Structured Light System with Open-Source Software

We propose modeling a structured light system with open-source computer graphics software to perform experimental verifications independently of the physical system. Encouraging experimental results show the capabilities of the digital twin. © 2022 The Author(s

Identification of new sources of resistance to RHBV- rice hoja blanca virus

With the aim to find new sources of resistance to rice hoja blanca (white leaf) disease, transmitted by the insect Tagosodes orizicolus, 660 genotypes were evaluated under greenhouse and field conditions. Seven resistant genotypes were identified, and genomic studies were performed to demonstrate that the resistance in these sources is genetically different from that of Fedearroz 2000, which is currently the variety with the most resistance to hoja blanca. These new resistance sources constitute a resource that can be used to sustainably extend hoja blanca disease management throughout all of the rice-growing regions of tropical America. This is the first report of hoja blanca resistance in indica rice and different from that of Fedearroz 2000

Mantle-to-crust metal transfer by nanomelts

The transfer of chalcophile metals across the continental lithosphere has been traditionally modeled based on their chemical equilibrium partitioning in sulfide liquids and silicate magmas. Here, we report a suite of Ni-Fe-Cu sulfide droplets across a trans-lithospheric magmatic network linking the subcontinental lithospheric mantle to the overlying continental crust. Petrographic characteristics and numerical calculations both support that the sulfide droplets were mechanically scavenged from the mantle source during partial melting and transported upwards by alkaline magmas rising through the continental lithosphere. Nanoscale investigation by high-resolution transmission electron microscopy (HR-TEM) documents the presence of galena (PbS) nanoinclusions within the sulfide droplets that are involved in the mantle-to-crust magma route. The galena nanoinclusions show a range of microstructural features that are inconsistent with a derivation of PbS by exsolution from the solid products of the Ni-Fe-Cu sulfide liquid. It is argued that galena nanoinclusions crystallized from a precursor Pb(-Cu)-rich nanomelt, which was originally immiscible within the sulfide liquid even at Pb concentrations largely below those required for attaining galena saturation. We suggest that evidence of immiscibility between metal-rich nanomelts and sulfide liquids during magma transport would disrupt the classical way by which metal flux and ore genesis are interpreted, hinting for mechanical transfer of nanophases as a key mechanism for sourcing the amounts of mantle-derived metals that can be concentrated in the crust.This research was supported by the BES-2017-079949 Ph.D. fellowship to E.S. The Spanish projects PID2019-111715GB-I00/AEI/10.13039/501100011033, NANOMET PID2022-138768OB-I00, and MECOBE ProyExcel_00705 provided funding for field emission gun–environmental scanning electron microscopy (FEG-ESEM), focused-ion beam (FIB) and high-resolution transmission electron microscopy (HR-TEM). M.F. and F.P. acknowledge financial support from the Australian Research Council through ARC Linkage Project LP190100785

Use of Andromed® and OviXcell® diluents in the processing of sheep semen with the addition of HTF

Objective: To assess the effect of two ovine semen diluents, Andromed® and OviXcell®, on the mass motility, vitality, and acrosomal integrity of spermatozoa processed at different temperatures and with the addition of post-thawed HTF (human tubal fluid). Design/Methodology/Approach: Semen from 2 Dorper ram was used. Four ejaculations per male were collected and diluted with Andromed® and Ovixcell®. There were four treatments with Ovixcell®: 1) fresh Ovixcell®, 2) refrigerated Ovixcell®, 3) post-thawed Ovixcell®, and 4) post-thawed Ovixcell® + HTF. Four treaments with Andromed® were also carried out: 1) fresh Andromed®, 2) refrigerated Andromed®, 3) post-thawed Andromed®, and 4) post-thawed Andromed® + HTF. Mass motility, vitality, and acrosomal integrity were performed with a CASA computer system and statistically analyzed with the GLM procedure of the SAS software. Results: When the effect of Ovixcell® mass motility was assessed, the following results were obtained, with differences (p˂0.05) between treatments: 87% in fresh semen, 72% refrigerated semen, 55% in post-thawed semen, and 68% in post-thawed semen + HTF. A clear difference (p˂0.05) was observed when HTF was added to post-thawed semen (13%). Andromed® behaved in the same way as Ovixcell® (p˂0.05) and a 18% recovery was observed with the addition of HTF. A high percentage of live spermatozoa with intact acrosome was observed for fresh semen (97.8%), while it diminished (p<0.05) as the temperature of refrigerated and frozen semen gradually decreased. Study Limitations/Implications: More experimental units should be used, despite the increase in maintenance costs per animal. Findings/Conclusions: The use of Andromed® and OviXcell® diluents was satisfactory in relation to the mass motility, vitality, and acrosomal integrity in spermatozoa processed at different temperatures (fresh, refrigerated, and post-thawed). Furthermore, the addition of HTF increased post-thawed mass motility

Complex and unexpected dynamics in simple genetic regulatory networks

Peer reviewedPublisher PD

Evaluación de un sistema de enfriamiento aplicado en el periodo seco de ganado lechero durante el verano

In order to determine some physiological responses 60 d prepartum and production responses postpartum to a cooling system in summer, 24 multiparous Holstein cows were allocated to two groups: one group with (n=12) and a second group without (n=12) cooling. Cooled cows showed a lower (PCon el objeto de evaluar algunas respuestas fisiológicas preparto y productivas posparto, se asignaron 24 vacas Holstein multíparas a dos tratamientos: con (n=12) y sin (n=12) sistema de enfriamiento durante su periodo seco en verano. Vacas enfriadas tuvieron menor (

Utilización de muestras de líquido esofagofaringeo para el diagnóstico de fiebre aftosa.

El diagnóstico etiológico de la fiebre aftosa (FA), se hace mediante la tipificación por la tecnica de la fijación del complemento con muestras de epitelio obtenidas de animales enfermos. En el LIMV, se hizo una investigación con el fin de mostrar la utilidad de la técnica de aislamiento de virus a partir de líquido esofágo-faríngeo (LEF) para la recuperación del virus de la fiebre aftosa en brotes de enfermedades vesiculares en los cuales no fue posible obtener muestras adecuadas de epitelios para las pruebas de diagnóstico por la fijación del complemento. Las muestras de LEF se tomaron de animales que se encontraban en la fase de recuperación, después de sufrir la enfermedad vesicular y en lapsos de tiempo variables, hasta 2 meses después de las manifestaciones clínicas. Se obtuvo el aislamiento de virus de FA en las muestras correspondientes de 19 a 32 hatos estudiados. Los virus fueron clasificados como pertenecientes a los tipos A y O de FA. Se investigó la presencia de anticuerpos séricos, contra el antígeno asociado a la infección por virus de la FA en los animales muestreados para aislamiento de virus. Los resultados obtenidos señalan que la técnica empleada para el aislamiento de virus, es una prueba eficiente que podría reforzar la vigilancia epidemiológica de la FA basada en el diagnóstico etiológicoGanado de doble propósito-Ganaderia doble proposit

Assessment of the status of small-scale fisheries resources in north-west Spain (Galicia) using length- based assessment methods

2nd Iberian Symposium on Modeling and Assessment of Fishery Resources (SIMERPE2) = 2º Simposio Ibérico de Modelado y Evaluación de Recursos Pesqueros, 24-27 October 2023, El puerto de Santa MaríaSmall-scale fisheries (SSFs) are major contributors to global catches and local economies, yet SSFs have historically been under-represented in national and international policies. In the European Union (EU), more than 80% of the fishing fleet is considered small-scale, and Galicia (NW Spain) is one of the most fisheries-dependent regions in Europe, with around 4000 fishing vessels, of which ~90% are registered as artisanal vessels. However, due to various data limitations, there is a lack of formal assessment of the main commercial species that could be used to implement better management practices. To overcome this shortcoming, and considering that length-frequency data from fisheries catches are probably the most common source of demographic information, a number of length-based methods (LBM) are available as potential assessment tools for use in data-limited scenarios. Therefore, in order to provide insight into the stock status of the main fishery resources of the Galician SSF (12 species of Teleostei, two Chondrichthyes, two Crustacea and two Cephalopoda), we applied two of the most commonly used LBMs, namely length-based indicators (LBI) and length-based spawning potential ratio (LBSPR), and one of the few models that relax the equilibrium assumption, such as the lengthbased integrated mixed effects (LIME). The selected LBMs were applied to the individual size data collected by the Galician Regional Government through the on-board monitoring programme of the SSF fleet, managed by its Technical Unit for Small-scale Fisheries (UTPB), for the period 2000 - 2022. To get an idea of the performance of the LBMs, for each stock we compared the results of the data-limited assessment with time series of the abundance index resulting from the standardization of catch-per-unit-of-effort (CPUE) data collected by the UTPB. This study represents a major step forward in the development of a stock assessment and management framework for one of Europe’s most important SSF fleets, based on the best available data and scientific toolsN