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737 results on '"Durán E"'

6. CGAlgebra: a Mathematica package for conformal geometric algebra. v.2.0

Author

Ortiz-Duran, E. Alejandra and Aragon, Jose L.

Subjects
Computer Science - Mathematical Software
Abstract

A tutorial of the Mathematica package CGAlgebra, for conformal geometric algebra calculations is presented. Using rule-based programming, the 5-dimensional conformal geometric algebra is implemented and defined functions simplify the calculations of geometric, outer and inner products, as well as many other calculations related with geometric transformations. CGAlgebra is available from https://github.com/jlaragonvera/Geometric-Algebra, Comment: Improved version, one figure

Published
2017

10. Impact of Irrigation Management Decisions on the Water Footprint of Processing Tomatoes in Southern Spain

Author

Universidad de Sevilla. Departamento de Agronomía, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Egea Cegarra, Gregorio, Castro Valdecantos, Pedro, Gómez Durán, E., Munuera, Teresa, Domínguez-Niño, Jesús M., Nortes, Pedro, Universidad de Sevilla. Departamento de Agronomía, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Egea Cegarra, Gregorio, Castro Valdecantos, Pedro, Gómez Durán, E., Munuera, Teresa, Domínguez-Niño, Jesús M., and Nortes, Pedro

Abstract

The water footprint is an increasingly demanded environmental sustainability indicator for certifications and labels in agricultural production. Processing tomatoes are highly water-intensive, and existing studies on water footprint have uncertainties and do not consider the impact of different irrigation configurations (e.g., surface drip irrigation (SDI) and subsurface drip irrigation (SSDI)) and irrigation strategies. This study presents a two-year experimental investigation to determine the water footprint of processing tomatoes grown in southern Spain (Andalusia) and the impact of SSDI and deficit irrigation. Five irrigation treatments were established: SDI1 (surface drip irrigation without water limitation), SDI2 (surface drip irrigation without water limitation adjusted by soil moisture readings), SSDI1 (subsurface drip irrigation without water limitation and a dripline depth of 15 cm), SSDI2 (similar to SSDI1 but with mild/moderate water deficit during the fruit ripening stage), and SSDI3 (subsurface drip irrigation without water limitation and a dripline depth of 35 cm (first year) and 25 cm (second year)). Measurements included crop vegetative growth, leaf water potential, leaf gas exchange, nitrate concentration in soil solution, and crop yield and quality. The soil water balance components (actual evaporation, actual transpiration, deep drainage), necessary for determining the total crop water footprint, were simulated on a daily scale using Hydrus 2D software. Results indicated that SSDI makes more efficient use of irrigation water than SDI. The water footprint of SSDI1 was 20–35% lower than that of SDI1. SSDI2 showed similar water footprint values to SDI1 under highly demanding environmental conditions and significantly lower values (≈40%) in a year with lower evaporative demand. The dripline depth in SSDI was critical to the water footprint. With a 35 cm installation depth, SSDI3 had a significantly higher water footprint than the other treatments, wh

Published
2024

11. Water_footprint_processing_tomatoes [dataset]

Author

Universidad de Sevilla. Departamento de Agronomía, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. AGR-278: Smart Biosystems Laboratory, Ministerio de Ciencia e Innovación (MICIN). España, Agencia Estatal de Investigación. España, Egea Cegarra, Gregorio, Castro Valdecantos, Pedro, Gómez Durán, E., Munuera, Teresa, Domínguez-Niño, Jesús M., Nortes, Pedro, Universidad de Sevilla. Departamento de Agronomía, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. AGR-278: Smart Biosystems Laboratory, Ministerio de Ciencia e Innovación (MICIN). España, Agencia Estatal de Investigación. España, Egea Cegarra, Gregorio, Castro Valdecantos, Pedro, Gómez Durán, E., Munuera, Teresa, Domínguez-Niño, Jesús M., and Nortes, Pedro

Abstract

Dataset generated in the work “Impact of Irrigation Management Decisions on the WaterFootprint of Processing Tomatoes in Southern Spain” whose main objective was to determine the water footprint of processing tomatoes grown in southern Spain under different drip irrigation methodologies.

Published
2024

16. Comparative Analysis of the Tracking Efficiency of a Maximum-Power Point Tracker Based on Maximum-Power Point Resistance Modeling Versus a Classic P&O

Author

Enrique, J. M., Barragán, A. J., Durán, E., Andújar, J. M., Ríos, J., Ferrera, M. B., Martins, I., Monteiro, J., Semião, J., Mortal, António, editor, Aníbal, Jaime, editor, Monteiro, Jânio, editor, Sequeira, Cláudia, editor, Semião, Jorge, editor, Moreira da Silva, Manuela, editor, and Oliveira, Miguel, editor

Published
2018
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49. Insights on the emerging biotechnology of histidine-rich peptides

Author

López-Laguna H, Voltà-Durán E, Parladé E, Villaverde A, Vázquez E, and Unzueta U

Subjects
Biomaterials, Recombinant protein, Biosensing, Nanobiotechnology, Modular protein
Abstract

In the late 70's, the discovery of the restriction enzymes made possible the biological production of functional proteins by recombinant DNA technologies, a fact that largely empowered both biotechnological and pharmaceutical industries. Short peptides or small protein domains, with specific molecular affinities, were developed as purification tags in downstream processes to separate the target protein from the culture media or cell debris, upon breaking the producing cells. Among these tags, and by exploiting the interactivity of the imidazole ring of histidine residues, the hexahistidine peptide (H6) became a gold standard. Although initially used almost exclusively in protein production, H6 and related His-rich peptides are progressively proving a broad applicability in novel utilities including enzymatic processes, advanced drug delivery systems and diagnosis, through a so far unsuspected adaptation of their binding capabilities. In this context, the coordination of histidine residues and metals confers intriguing functionalities to His-rich sequences useable in the forward-thinking design of protein-based nano- and micro-materials and devices, through strategies that are comprehensively presented here.

Published
2022

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