1,997 research outputs found
Individual variance in the attributes of Clusia salvinii Donn. Smith associated with the attraction of frugivores in the dispersal of fruits and seeds
Seed dispersal is one of the processes of plant-frugivore interactions that involves characteristics specific to the plant effecting the attraction of frugivores. In this paper, the individual variance in the attributes of Clusia salvinii in relation to the attraction of frugivores and its effect on the dispersal of fruits and seeds in the Reserva de Nanchititla, State of Mexico was studied. The morphometric characteristics of 25 trees of the C. salvinii species were evaluated (height, coverage, number of fruit, number of seeds per fruit, and fruit below the canopy). The removal of fruits and seeds (dispersal) was also estimated, as well as some of its attributes as estimators of the quantity of biomass assigned to the reproduction or as compensation for the dispersers (average weight per tree, average weight of the arils per tree). According to the results, tree height and harvest size or fruit production have an effect on the removal of seeds. On the other hand, the mass of the fruit, aril and seed had no relation to the removal of the fruit. Tree height and the quantity of fruit play an important role in the attraction of dispersers
Intensification of heat transfer during mild thermal treatment of dry-cured ham by using airborne ultrasound
[EN] The application of power ultrasound (PuS) could be used as a novel technology with which to intensify thermal treatments using hot air. Mild thermal treatments have been applied to improve the soft texture of dry-cured ham caused by defective processing. In this regard, the aim of this study was to assess the kinetic intensification linked to the application of airborne PuS in the mild thermal treatment using hot air of dry-cured ham. For this purpose, vacuum packed cylindrical samples (2.52±0.11cm in diameter and 1.90±0.14cm in height) of dry-cured ham were heated using hot air at different temperatures (40, 45, 50°C) and air velocities (1, 2, 3, 4, 6m/s) with (22.3kHz, 50W) and without PuS application. Heat transfer was analyzed by considering that it was entirely controlled by conduction and the apparent thermal diffusivity was identified by fitting the model to the heating kinetics. The obtained results revealed that PuS application sped up the heat transfer, showing an increase in the apparent thermal diffusivity (up to 37%). The improvement in the apparent thermal diffusivity produced by PuS application was greater at high temperatures (50°C) but negligible at high air velocities (6m/s). Heating caused an increase in the hardness and elasticity of dry-cured ham, which would correct ham pastiness defects, while the influence of PuS on such textural parameters was negligible.The authors acknowledge financial support from the "Spanish Ministerio de Economia y Competitividad (MINECO), the Institute Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA)" in Spain, the European Regional Development Fund (ERDF 2014-2020) (Project RTA2013-00030-C03-02) and the PhD grant of M. Contreras from the Universitat Politecnica de Valencia (Ref 2447 FPI-Programe 1-2015).Contreras-Ruiz, M.; Benedito Fort, JJ.; Bon CorbĂn, J.; Garcia-Perez, J. (2018). Intensification of heat transfer during mild thermal treatment of dry-cured ham by using airborne ultrasound. Ultrasonics Sonochemistry. 41:206-212. https://doi.org/10.1016/j.ultsonch.2017.09.019S2062124
Accelerated mild heating of dry-cured ham by applying power ultrasound in a liquid medium
[EN] Mild thermal treatments could be considered a feasible technique with which to improve the texture of dry-cured ham. This study explores the feasibility of using power ultrasound (PuS) to intensify heat transfer during the mild thermal treatment of dry-cured ham immersed in a liquid medium. For that purpose, a temperature controlled ultrasonic bath was used to avoid the water temperature rise due to cavitation during ultrasonic application, which could mask the actual effect of ultrasound in heat transport mechanisms. Experiments were carried out using dry-cured ham slices (thickness 2 cm), which were heated at different temperatures (40, 45, 50 degrees C) with (PuS) and without (conventional mechanical stirring, CV) ultrasonic assistance. Temperature was monitored in the two main muscles of the ham (Biceps lemons and Semimembranosus) and in different positions of the slice. A model that considered heat transfer entirely controlled by conduction was chosen for describing heating kinetics and quantify the influence of temperature and ultrasonic application in the apparent thermal diffusivity.
The heat conduction model proposed was adequate to describe both CV and PuS heating kinetics (VAR > 98.6%). Ultrasound application sped up the heat transfer by increasing the apparent thermal diffusivity up to 51%, but the higher the temperature, the lower the ultrasonic intensification. The apparent thermal diffusivities identified for the slices were satisfactorily validated (VAR > 98.4%) in independent experiments with ham cylinders. Therefore, PuS could be considered as an effective technology for the purposes of accelerating the heat transfer, thus shortening the heating time of dry-cured ham slices immersed in a liquid medium.The authors acknowledge the financial support from the "Spanish Ministerio de Economia y Competitividad (MINECO), Instituto Nacional de Investigation y Tecnologia Agraria y Alimentaria (INIA)" in Spain, the European Regional Development Fund (ERDF 2014-2020) (Project RTA2013-00030-C03-02) and the PhD grant of M. Contreras from Universitat Politecnica de Valencia.Contreras-Ruiz, M.; Benedito Fort, JJ.; Bon CorbĂn, J.; Garcia-Perez, J. (2018). Accelerated mild heating of dry-cured ham by applying power ultrasound in a liquid medium. Innovative Food Science & Emerging Technologies. 50:94-101. https://doi.org/10.1016/j.ifset.2018.10.010S941015
How a bottom-up multi-stakeholder initiative helped transform the renal replacement therapy landscape in Spain
[Abstract] Healthcare reforms aim to change certain parts of the health system to improve quality of care, access, or financial sustainability. Traditionally, healthcare reform is understood as an action undertaken by a government at a national or local level. However, bottom-up changes can also lead to improvements in the health system. This paper describes the efforts of a coordinated multi-stakeholder advocacy group in Spain to promote a more cost-effective and patient-centred treatment for people receiving renal replacement therapy and assesses the outcomes of their advocacy for health system financing and patient satisfaction. It concludes that bottom-up initiatives do indeed have the power to change health policy and that policy makers should pay attention to their arguments
DesafĂo tecnolĂłgico: herramienta para trabajar y evaluar las competencias básicas y generales en los estudios de grado de la E.T.S.I. de TelecomunicaciĂłn
This work presents the evolution of the five editions of the educational activity named “Technological Challenge” specially focused on the students at “Escuela TĂ©cnica Superior de IngenierĂa de TelecomunicaciĂłn” (ETSIT), but open to all students of the “Universidad de Málaga” (UMA). This initiative has been developed in the context of the educational innovation project PIE17-021 funded by UMA. The “Technological Challenge” consists on the formulation of specific real problems, which students must face in a competitive regime. This activity allows the reinforcement and evaluation of basic and general competences reached by the graduate students in the ETSIT.
After nearly five years, this paper describes the evaluation of the results, regarding interest and participation of the students in the “Technology Challenge” along with the basic and general competences reached by the students.Universidad de Málaga. Campus de Excelencia Internacional AndalucĂa Tech.
PIE17-02
New records of Reig´s tuco-tuco (Ctenomys osvaldoreigi) in the Pampa de Achala, Córdoba, Argentina
Ctenomys es uno de los gĂ©neros más diversos de roedores sudamericanos y el conocimiento de su taxonomĂa alfa es aĂşn incompleto. En la provincia de CĂłrdoba se han citado cinco especies vivientes. Una de ellas, el tuco-tuco de Reig, fue reportada solo para su localidad tipo. En este trabajo se reportan poblaciones previamente no documentadas de esta especie sobre la base de colectas de especĂmenes y registros de actividad. La identificaciĂłn de los especĂmenes se basĂł en comparaciones con la serie tipo y otras especies (vivientes y fĂłsiles) presentes en CĂłrdoba. Finalmente, se discute el estado del conocimiento del gĂ©nero y la necesidad de incrementar relevamientos de campo.The genus Ctenomys is one of the most diverse among rodents, and knowledge of its alpha-taxonomy is still incomplete. Five living species have been reported from CĂłrdoba province. One of them, Reig´s tuco-tuco, was reported only for its type locality. In this work we report new populations of this species including specimen collection and activity records. The identification of the specimens collected was based on comparison with the type series and other species (living and extinct) present in CĂłrdoba. Finally, we discuss the state of knowledge of the genus and the need to increase field surveys.Fil: Contreras, Facundo. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; ArgentinaFil: Perez, MartĂn. Universidad Nacional de RĂo Cuarto. Facultad de Ciencias Exactas, FisicoquĂmicas y Naturales. Departamento de Ciencias Naturales; ArgentinaFil: Priotto, Jose Waldemar. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; ArgentinaFil: Coda, JosĂ© Antonio. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; ArgentinaFil: Mapelli, Fernando Javier. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". EstaciĂłn HidrobiolĂłgica de Puerto QuequĂ©n (sede QuequĂ©n); Argentin
Association between central retinal thickness and low luminance visual acuity in early age-related macular degeneration
Purpose/Aim: To examine whether central retinal thickness (CRT) is related to mesopic visual acuity (VA) and low luminance deficit (LLD, difference between photopic and mesopic VA) in eyes with early and intermediate age-related macular degeneration (AMD).
Materials and Methods: In a cross-sectional study, 50 pseudophakic subjects older than 63 years were divided into three groups (no AMD, early AMD and intermediate AMD). Spectral domain optical coherence tomography (SD-OCT) was used to measure CRT in the 1 mm-central-area. Best-corrected distance VA was measured under photopic or mesopic luminance conditions and LLD calculated. Subjects were stratified by VA impairment to compare CRTs across these groups. Relationships were examined by stepwise multiple linear regression.
Results: No significant differences in mean CRT, photopic and mesopic VA or LLD were detected between the groups no AMD, early AMD and intermediate AMD. However, mean CRTs were 20 microns and 18 microns thicker in the eyes with impaired mesopic VA (> 0.3 logMAR) and impaired LLD (⩾ 0.3 logMAR) compared to the eyes with non-impaired VA or LLD respectively (both p < 0.01). CRT and mesopic pupil size were independent predictors of mesopic VA (p = 0.001). CRT emerged as the only independent predictor of LLD (p = 0.004).
Conclusions: Increased CRT was linked to worse retinal function when measured under mesopic conditions in eyes without AMD and eyes with early to intermediate AMD. SD-OCT imaging combined with VA measurements under low luminance conditions could be a useful tool to detect early AMD
Plan de responsabilidad social para la mejora de la compañĂa Alkosto
Anexo A E-Book de Ă©tica para la empresa Alkosto Link : https://editor-storage.reedsy.com/books/135368/exports/success/9355e084-0fb9- 4e34-9b07-28b4fe345e33/202004092354-codigo-de-etica-alkosto.zip Anexo B Diagnostico por observaciĂłnLa empresa seleccionada es una cadena de tiendas en Colombia llamada Alkosto, se
caracteriza por ser lĂder en el sector comercial compitiendo con sus precios bajos,
además de comercializar todo tipo de elementos básicos para la satisfacción de una gran
variedad de necesidades, por esto vemos una gran oportunidad en expandirnos
enfocándonos para el año 2022 en tener mayor presencia a nivel nacional llevando a
cada uno de nuestros clientes la mejor experiencia de compra para asĂ fidelizarlos, esto
iniciando desde varias de nuestras estrategias de marketing interno y externo, donde
deseamos involucrar nuestros clientes y a su vez mejorar nuestra visibilidad mediante la
potencializaciĂłn de marketing digital y redes sociales que a su vez nos ayudara a
disminuir publicidad fĂsica que genera desechos e impacto ambiental siendo eficaces en
nuestro proceso de responsabilidad social, adicional buscamos generar inclusiĂłn y
reconociendo a todas las personas que interactĂşen de manera directa o indirecta con la
compañĂa impulsando una mejor calidad de vida, en aspectos econĂłmicos y ambientales
mediante planes de acciĂłn que nos lleven a impactar positivamente y cumpliendo
protocolos establecidos para nuestra excelencia, igualmente siempre enfocándonos en
incentivar y organizar nuestro personal mediante las polĂticas de la compañĂa y
cumplimiento estricto de normas para garantizar la calidad de nuestros productos, el buen
funcionamiento de todos los almacenes y generando valores corporativos al personal
encargado en todas las áreas, para alcanzar la excelencia en conjunto como compañĂa y
transmitirla mediante la prestaciĂłn de nuestros servicios logrando la satisfacciĂłn del
cliente.The selected company is a chain of stores in Colombia called Alkosto, it is characterized
by being a leader in the commercial sector competing with its low prices, in addition to
marketing all kinds of basic elements to satisfy a wide variety of needs, for this we see a
great opportunity to expand by focusing by 2022 on having a greater presence at the
national level, bringing to each of our clients the best shopping experience in order to
retain them, this starting from several of our internal and external marketing strategies,
where we want to involve our clients and in turn improve our visibility through the
enhancement of digital marketing and social networks that in turn will help us to reduce
physical advertising that generates waste and environmental impact, being effective in
our process of social responsibility, additionally we seek to generate inclusion and
recognizing all people they interact man was direct or indirect with the company
promoting a better quality of life, in economic and environmental aspects through action
plans that lead us to positively impact and complying with established protocols for our
excellence, also always focusing on incentivizing and organizing our personnel through
the policies of the company and strict compliance with standards to guarantee the quality
of our products, the proper functioning of all warehouses and generating corporate values
for the personnel in charge in all areas, to achieve overall excellence as a company and
transmit it through the provision of our services achieving customer satisfaction
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