623 research outputs found

    Criterios de implementación de buenas prácticas pecuarias, en la producción bovina de leche, en la finca El Encenillo municipio de Zipacón Cundinamarca

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    Teniendo en cuenta este trabajo se basa en analizar una serie de requerimientos que se deben tener en cuenta al momento de buscar una certificación de buenas prácticas pecuarias (BPP) por parte el ICA, es este caso la respectiva visita que se realizo fue a una finca de producción ganadera en leche por tanto realizaremos el estudio de la lista de chequeo de verificación en buenas practicas pecuarias. Esta finca visitada está ubicada en el municipio de Zipacón Cundinamarca y se llama finca El Encenillo. Es importante resaltar que la finca no cuenta con la certificación de buenas prácticas pecuarias y se utilizara una lista de chequeo descargada de la página del ICA lista de chequeo para predios productores de leche. Al final realizaremos una serie de análisis y conclusiones de la vista y verificación de lo sugerido en la lista de chequeo propuesta para el sector lechero.Taking this into account, the work is based on analyzing a series of requirements that must be taken into account when seeking a certification of good livestock practices (GPP) by the ICA. In this case, the respective visit that was carried out was to a dairy livestock production farm therefore we will carry out the study of the verification checklist in good livestock practices. This visited farm is located in the municipality of Zipacón Cundinamarca and is called El Encenillo farm. It is important to highlight that the farm does not have certification of good livestock practices and a checklist downloaded from the ICA page checklist for milk producing farms will be used. At the end we will carry out a series of analyzes and conclusions based on the view and verification of what is suggested in the proposed checklist for the dairy sector

    Ultra-low thermal conductivities in large-area Si-Ge nanomeshes for thermoelectric applications

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    In this work, we measure the thermal and thermoelectric properties of large-area Si0.8Ge0.2 nano-meshed films fabricated by DC sputtering of Si0.8Ge0.2 on highly ordered porous alumina matrices. The Si0.8Ge0.2 film replicated the porous alumina structure resulting in nano-meshed films. Very good control of the nanomesh geometrical features (pore diameter, pitch, neck) was achieved through the alumina template, with pore diameters ranging from 294 ± 5nm down to 31 ± 4 nm. The method we developed is able to provide large areas of nano-meshes in a simple and reproducible way, being easily scalable for industrial applications. Most importantly, the thermal conductivity of the films was reduced as the diameter of the porous became smaller to values that varied from κ = 1.54 ± 0.27 W K−1m−1, down to the ultra-low κ = 0.55 ± 0.10 W K−1m−1 value. The latter is well below the amorphous limit, while the Seebeck coefficient and electrical conductivity of the material were retained. These properties, together with our large area fabrication approach, can provide an important route towards achieving high conversion efficiency, large area, and high scalable thermoelectric materials

    Analysis of Engine Thermal Effect on Electronic Control units for “Robot Fleets for Highly effective Agriculture and Forestry Management” (RHEA)

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    The procedures carried out in order to perform the analysis by engine thermal effect on the electronic control units installed on a ground robot fleet were studied in this work. The objective is to characterize the temperatures on the engine tractor environment for different tasks. In this way, it could be possible to estimate the environmental conditions that the cabinets will be exposed to. Those cabinets, in which the electronic controls of sensors, actuators and power supplies will be stored, will be located aboard the ground robot unit

    Unusual finding during laparoscopic cholecystectomy: liver choristoma in the gallbladder wall

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    Hepatic choristomas or ectopic livers are rare developmental anomalies and are usually located in the abdomen, retroperitoneum and thorax. A 34-year-old male patient underwent a scheduled laparoscopic cholecystectomy, the findings during surgery were a gallbladder with multiple lithiasis inside, with a smooth fragment of reddish-brown tissue attached to the anterolateral surface of the gallbladder. The patient evolved satisfactorily and was discharged 24 hours after surgery. Objective was to describe a clinical case of hepatic choristoma adhered to the anterolateral wall of the gallbladder, as well as its etiology, clinical picture and therapeutic conduct. Hepatic choristoma in the gallbladder is due to an anomaly in the embryologic development of the liver, due to its potential for malignant degeneration, it should be resected as soon as it is detected, being laparoscopic cholecystectomy an adequate approach

    Early Molecular Responses of Tomato to Combined Moderate Water Stress and Tomato Red Spider Mite Tetranychus evansi Attack

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    Interaction between plants and their environment is changing as a consequence of the climate change and global warming, increasing the performance and dispersal of some pest species which become invasive species. Tetranychus evansi also known as the tomato red spider mite, is an invasive species which has been reported to increase its performance when feeding in the tomato cultivar Moneymaker (MM) under water deficit conditions. In order to clarify the underlying molecular events involved, we examined early plant molecular changes occurring on MM during T. evansi infestation alone or in combination with moderate drought stress. Hormonal profiling of MM plants showed an increase in abscisic acid (ABA) levels in drought-stressed plants while salicylic acid (SA) levels were higher in drought-stressed plants infested with T. evansi, indicating that SA is involved in the regulation of plant responses to this stress combination. Changes in the expression of ABA-dependent DREB2, NCED1, and RAB18 genes confirmed the presence of drought-dependent molecular responses in tomato plants and indicated that these responses could be modulated by the tomato red spider mite. Tomato metabolic profiling identified 42 differentially altered compounds produced by T. evansi attack, moderate drought stress, and/or their combination, reinforcing the idea of putative manipulation of tomato plant responses by tomato red spider mite. Altogether, these results indicate that the tomato red spider mite acts modulating plant responses to moderate drought stress by interfering with the ABA and SA hormonal responses, providing new insights into the early events occurring on plant biotic and abiotic stress interaction

    Hepatoid adenocarcinoma of the stomach – a different histology for not so different gastric adenocarcinoma: a case report

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    Hepatoid adenocarcinoma is an extrahepatic tumor characterized by morphological similarities to hepatocellular carcinoma. Hepatoid adenocarcinoma of the stomach is a cancer with an extremely poor prognosis with few cases reported. Here, we describe a 75-year-old Spanish man referred to our hospital with a history of abdominal pain, general fatigue, anorexia and sickness. Initial study revealed anemia, and computed tomography scan and abdominal ultrasonography showed multiple metastases to the liver with hepatocellular carcinoma characteristics in a liver with no cirrhotic change. Further study included a serum level of alpha-fetoprotein (AFP), which resulted markedly elevated, and a conclusive esophagogastroduodenoscopy describing an elevated tumour growing through the cardia and gastroesophageal junction with foci of necrosis and haemorrhage. Gastric biopsies of the tumor revealed poorly differenciated adenocarcinoma, with hepatoid differentiation. After a diagnosis of AFP-producing hepatoid adenocarcinoma of the stomach with multiple liver metastases was made, pallitive total gastrectomy, without liver resection, was performed. Patient recovered well after surgery, and entered into a palliative systemich chemotherapy protocol. Although this illness is recognized as having poor prognosis, the patient remains alive 8 months after the operation. Accurate diagnosis of hepatoid adenocarcinoma of the stomach is important, and should be suspected under certain circumstances. We describe this rare case of hepatoid adenocarcinoma of the stomach, and review the literature concerning the clinicopathological aspects

    Influence of high cardiovascular risk in asymptomatic people on the duration and cost of sick leave: results of the ICARIA study

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    Aims We investigated the potential influence of a moderate-to-high cardiovascular (CV) risk (CVR) (defined as a Systematic COronary Risk Evaluation model, or SCORE ≥ 4%), in the absence of an established CV disease, on the duration and cost of CV and non-CV sick leave (SL) resulting from common and occupational accidents or diseases. Methods and results We conducted a prospective cohort study on 690 135 workers with a 1-year follow-up and examined CV- and non-CV-related SL episodes. To obtain baseline values, CVR factors were initially assessed at the beginning of the year during routine medical examination. The CVR was calculated with the SCORE charts for all subjects. Moderate-to-high CVR was defined as SCORE ≥ 4%. A baseline SCORE ≥ 4% was associated with a higher risk for long-term CV and non-CV SL, as revealed by follow-up assessment. This translated into an increased cost, estimated at €5 801 464.18 per year. Furthermore, pharmacological treatment for hypertension or hyperlipidaemia was significantly associated with longer SL duration. Conclusion Moderate-to-high CVR in asymptomatic subjects was significantly associated with the duration and cost of CV and non-CV SL. These results constitute the first body of evidence that the SCORE charts can be used to identify people with a non-established CV disease, which might ultimately translate into more lost workdays and therefore increased cost for societ

    Global monitoring of soil multifunctionality in drylands using satellite imagery and field data

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    Models derived from satellite image data are needed to monitor the status of terrestrial ecosystems across large spatial scales. However, a remote sensing-based approach to quantify soil multifunctionality at the global scale is missing despite significant research efforts on this topic. A major constraint for doing so is the availability of suitable global-scale field data to calibrate remote sensing indicators (RSI) and, to a lesser extent, the sensitivity of spectral data of available satellite sensors to soil background and atmospheric conditions. Here, we aimed to develop a soil multifunctionality model to monitor global drylands coupling ground data on 14 soil functions of 222 dryland areas from six continents to 18 RSI derived from a time series (2006–2013) Landsat dataset. Among the RSI evaluated, the chlorophyll absorption ratio index was the best predictor of soil multifunctionality in single-variable-based models (r = 0.66, P < 0.01, NMRSE = 0.17). However, a multi-variable RSI model combining the chlorophyll absorption ratio index, the global environment monitoring index and the canopy-air temperature difference improved the accuracy of quantifying soil multifunctionality (r = 0.73, P < 0.01, NMRSE = 0.15). Furthermore, the correlation between RSI and soil variables shows a wide range of accuracy with upper and lower values obtained for AMI (r = 0.889, NMRSE = 0.05) and BGL (r = 0.685, NMRSE = 0.18) respectively. Our results provide new insights on assessing soil multifunctionality using RSI that may help to monitor temporal changes in the functioning of global drylands effectively.Field data were obtained with the support of the European Research Council (ERC) grant agreement 242658 (BIOCOM). Hernández-Clemente R was supported by the Ramón y Cajal program (RYC2020-029187-I) and the State Plan for Scientific and Subprogram for Knowledge Generation (PID2021-124058OA-I00) from the Spanish Ministry of Science and Innovation (RYC2020-029187-I). Maestre FT acknowledges support from Generalitat Valenciana (CIDEGENT/2018/041) and the Spanish Ministry of Science and Innovation (EUR2022-134048)

    FSD-HSO Optimization Algorithm for Closed Fringes Interferogram Demodulation

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    Due to the physical nature of the interference phenomenon, extracting the phase of an interferogram is a known sinusoidal modulation problem. In order to solve this problem, a new hybrid mathematical optimization model for phase extraction is established. The combination of frequency guide sequential demodulation and harmony search optimization algorithms is used for demodulating closed fringes patterns in order to find the phase of interferogram applications. The proposed algorithm is tested in four sets of different synthetic interferograms, finding a range of average relative error in phase reconstructions of 0.14–0.39 rad. For reference, experimental results are compared with the genetic algorithm optimization technique, obtaining a reduction in the error up to 0.1448 rad. Finally, the proposed algorithm is compared with a very known demodulation algorithm, using a real interferogram, obtaining a relative error of 1.561 rad. Results are shown in patterns with complex fringes distribution
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