Resultados de investigación

Ethical slaughter practices for crustaceans remain poorly standardized, and their effects on product quality and consumer perception are insufficiently understood. This study evaluated four ice-slurry-based slaughter methods in Penaeus vannamei reared under intensive biofloc technology (BFT) and their impact on refrigerated shelf life. While BFT enhances farming sustainability, it may an increase in microbial load, potentially shaping post-mortem spoilage. Shrimp were subjected to cold thermal shock in seawater ice slurry (C-TS); a 5 min immersion in chilled seawater with 50 ppm sodium hypochlorite, followed by TS (5BTS); 3–4 h of intestinal clarification, followed by 1 min immersion in chilled seawater with 50 ppm sodium hypochlorite and subsequent TS (C1BTS); and TS, followed by UV-C exposure (TS-UV). Over 12 days at <4 ◦C refrigeration, culture-based microbiology (mesophilic bacteria, enterobacteria, psychrotrophs, pseudomonas, and specific spoilage organisms), total volatile nitrogen compounds (TVB-N), melanosis, and qualitative descriptive analysis were performed. Storage time showed typical spoilage patterns driven by psychrotrophic bacteria, TVB-N, and melanosis. Slaughter method influenced quality: C1BTS limited psychrotroph proliferation but accelerated melanosis, and TS-UV yielded the poorest performance. Notably, 5BTS delayed melanosis (~3 days), maintained sensory quality, and avoided excessive microbial growth, making it the most effective method. These findings provide practical guidance for additive-free shrimp processing and identify psychrotrophs as key spoilage indicators in BFT systems., This work was supported by I+D+i Research Project: “Pursuing the zero waste in Biofloc Technology to produce a sustainable and biosafe aquaculture product (ZeroFloc)” (PID2023-149570OB-I00). S. Ferrando-Juan has a predoctoral Research Personnel Training Grant (PRE2021-098367) supported by MCIN/AEI/10.13039/501100011033/. A. Honrado-Frías was supported by grant from Government of Aragón. The authors gratefully acknowledge Javier Gómez Aguilera, shrimp farm technician at the Universitat Politècnica de València, for his valuable assistance with the daily care and maintenance of the animals. The authors also thank Jessica Brol, student and laboratory colleague, for her willingness to assist throughout the study. In addition, we acknowledge the colleagues at the Universidad de Zaragoza who contributed to shrimp quality assessment and melanosis evaluation, and we sincerely appreciate their time and expertise.

Sustainability website indicators after scraping the websites of textile companies in the Comunitat Valencia region.

[EN] This dataset includes, as supplementary material of the article "How does the type of MCDM method affect the results of the prioritization and assessment of ecosystem services? A case study in the Ebro River Delta (Spain)", the detailed calculations of the different decision-making methods applied for each expert, as well as the compatibility and correlation analyses of the priorities obtained.

CuOx (x = 1 and 2) nanostructures have been synthesized by electrochemical anodization in ethylene glycol based electrolytes using oxalic acid or NaF (with or without NaOH) as complexing agents. The influence of hydrodynamic conditions and time during anodization of copper have also been evaluated. An electrochemical and photoelectrochemical characterization of the nanostructures has been performed.

[EN] The dataset contains information on citrus fruit prices and varieties across different provinces in the Comunitat Valenciana, Spain, over multiple seasons (2015-2016 to 2023-2024 seasons). It includes various statistical indicators derived from weekly price observations. The data aims to support agricultural market analysis, price forecasting, and clustering methodology research., Authors acknowledge the support of “Ayuda a Primeros Proyectos de Investigación (PAID-06-22), Vicerrectorado de Investigación de la Universitat Politècnica de València (UPV)”.

The influence of three annealing atmospheres (air, nitrogen and argon) and the use of controlled hydrodynamic conditions (from 0 to 5000 rpm) on morphological, structural, chemical and photoelectrochemical properties of TiO2 nanotubes have been evaluated. For this purpose, different characterization techniques have been used: Raman Confocal Laser Spectroscopy, X-Ray Photoelectron Spectroscopy, Mott-Schottky analysis and photoelectrochemical water splitting tests. According to the results, it can be concluded that both hydrodynamic conditions and annealing in non-oxidizing atmospheres improve the photoelectrochemical response of the TiO2 nanotubes. This fact has been attributed to the oxygen vacancies formed after annealing in argon and nitrogen atmospheres and also to the presence of nitrogen into the TiO2 lattice due to the thermal treatment in the nitrogen atmosphere.

The numerical information in these datasets consists of two files. The first file (Dataset_SRI.xlsx) contains the asset data of monthly returns and ESG risk scores for three fund managers from January 2011 to December 2019. The second file (Pareto_Fronts.xlsx) contains the mean-variance-ESG Pareto fronts and the Pareto sets of non-dominated solutions for each manager obtained using the ev-MOGA algorithm. To get these Pareto fronts, we have considered an in-sample period of 72 monthly returns over six years from January 2011 to December 2016. To implement the ev-MOGA algorithm, we use an initial population of 50000 individuals and an auxiliary population of 500. The number of boxes defining the space of each function is 100.

Biofloc technology transforms nitrogen wastes into microbial biomass, that can be consumed in situ by cultured animals. The process requires addition of an exogenous carbon source at a specific carbon-to-nitrogen (C:N) ratio. In this study, three carbon sources at 10:1, 18:1, and 26:1 C:N ratios were tested under super-intensive conditions (350 P.vannamei/m³): molasses (MOL, control), yeast (YST), with an initial brewer's yeast addition and polybutylene succinate (PBS, as slow-release carbon source). Through biofloc maturation, the water quality parameters remained optimal, with PBS strategy and low-to-intermediate C:N ratios exhibiting reduced nitrogen and phosphate levels. The mineral dynamics evidenced that seawater and biofloc experienced a decrease in Ca, K, Mg, and Sr while shrimp accumulated these elements over time. Additionally, the biofloc acted as a mineral reservoir accumulating several times more ions than water and shrimp. Carbon strategies influenced bacterial composition of biofloc differently, with YST treatment supporting dominant bacterial groups, while PBS favored less abundant taxa. Both MOL and YST promoted an increase in heterotrophic bacteria, however, MOL exhibited a more balanced distribution of key bacterial groups involved in the nitrogen cycle. Regarding shrimp performance, PBS produced the lowest specific growth rate despite showing better water quality and higher bacterial diversity, likely due to reduced heterotrophic bacteria. Finally, a principal component analysis highlighted the interactions between water quality, bacterial diversity and shrimp growth. Overall, the findings suggest that MOL carbon addition strategy at low-to-intermediate C:N ratios as the most recommendable based on its more balanced bacterial composition and good shrimp performance., This work was supported by I+D+i Research Project: “Optimizing shrimp feeding and nutrition in biofloc system (BioFlango)” (PID2020–114574RB-C21), and the Research Personnel Training Grant (PRE2021–098367); supported by MCIN/ AEI/10.13039/501100011033/. Additionally, a farm technician was recruited through the grant: Fish Production Management in Biofloc: An Economically and Environmentally Sustainable System (EDGJID/2021/255), supported by Generalitat Valenciana & with RRHH funding. Funding for open access charge: Universitat Politècnica de València. Special acknowledgements to Andrés Moñino, María Consolación Milián and Laura Caro, shrimp farm technicians, for their valuable assistance in the daily care and maintenance of the animals. And, extended gratitude to Javier Moya, laboratory technician, for his support and guidance during the sample analysis.

The dataset contains the data that have been obtained during the calculation of the equilibrium conditions used for the construction of the Pourbaix diagrams for iron-chromium alloys in the absence of and in the presence of lithium bromide (LiBr)/water (H2O) solutions with high concentrations (400-992 g/L) to simulate the aggressive conditions in the LiBr absorption machines. Equilibrium conditions for electrochemical and chemical reactions are calculated. The activity values of aqueous species considered are 10^–6, 10^–4, 10^–2 and 10^0. The bromide ion activities are 15.61, 194.77, 650.06 and 2042.65 and the water activities are 0.715, 0.358, 0.216 and 0.118, corresponding respectively to LiBr/H2O concentrations of 400, 700, 850 and 992 g/L at 25 ºC.

The dataset contains the data that have been used to synthesize and characterize different types of nanostructures (WO3, WO3-Mo, TiO2, and TiO2-ZnO) for a comparison of hybrid and pure nanostructures to use them as a photoanodes for photoelectrocatalytic degradation of emerging contaminants. A structural and compositional characterization was performed using Raman confocal laser spectroscopy and X-Ray Diffraction (XRD). Photoelectrochemical characterization of nanostructures was performed by Photoelectrochemical Impedance Spectroscopy (PEIS), Mott-Schottky (M-S), and Water Splitting (WS) tests. Finally, the photoelectrocatalytic degradation of the pesticide Imazalil was carried out with the best optimized nanostructure (TiO2-ZnO).