Fernando Mata

Dr. Fernando Mata

Estação Zootecnica Nacional, Instituto Nacional de Investigação Agrária e Veterinária, Lisbon, Lisboa, Portugal
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Research Focus & Metrics

Academic Career Length

34Years (1993-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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19 April 2022 in Polymers
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Meirielly Santos JesusMeirielly Santos Jesus
Meirielly Santos Jesus
APAloia Romaní Pérez
Aloia Romaní Pérez
Fernando MataFernando Mata
Fernando Mata
LDLucília Domingues
Lucília Domingues
Europe is considered the largest producer of wine worldwide, showing a high market potential. Several wastes are generated at the different stages of the wine production process, namely, vine pruning, stalks, and grape marc. Typically, these residues are not used and are commonly discarded. Portugal generates annually approximately 178 thousand metric tons of wine production waste. In this context, the interest in redirecting the use of these residues has increased due to overproduction, great availability, and low costs. The utilization of these lignocellulosic biomasses derived from the wine industry would economically benefit the producers, while mitigating impacts on the environment. These by-products can be submitted to pre-treatments (physical, chemical, and biological) for the separation of different compounds with high industrial interest, reducing the waste of agro-industrial activities and increasing industrial profitability. Particularly, vine-pruning residue, besides being a source of sugar, has high nutritional value and may serve as a source of phenolic compounds. These compounds can be obtained by bioconversion, following a concept of biorefinery. In this framework, the current routes of the valorisation of the pruning residues will be addressed and put into a circular economy context.

4 October 2014 in Veterinary Record
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JOJ. Onyango
J. Onyango
Fernando MataFernando Mata
Fernando Mata
WMW. McCormick
W. McCormick
SCS. Chapman
S. Chapman
Orf is a viral disease found in English sheep flocks which can cause economic losses. It is a zoonosis with little epidemiological research available in the UK. In 2012, 3000 questionnaires were sent to English sheep farms in order to investigate the prevalence of orf, determine vaccination efficacy and to identify some of the potential risk factors. The usable response rate was 25.4 per cent. The usable farms (N=762 in the years 2011 and 2012) were used to model the percentage of animals affected on the farm, and the probability of a farm being found with the disease. The disease prevalence (DP) was standardised for the year and calculated as 1.88 per cent for ewes and 19.53 per cent for lambs. The disease risk ratio (RR) for the use of the vaccine was calculated as 2.04 for ewes and 0.75 for lambs, and therefore, the study found that lamb vaccination was beneficial (RR <1). Weed infestation and an increased number of orphan lambs were associated with increased cases of orf. We conclude that the DP in ewes and lambs affect each other, though the impact is higher for lambs in the presence of increasing prevalence in ewes. A short lambing season lowers the probability of a farm experiencing cases of orf. Vaccination was effective in lambs but not in ewes, though lambs benefitted when ewes were vaccinated (reduced orf prevalence in lambs born from vaccinated ewes), probably because any unvaccinated ewes may have been carriers that could spread the virus to the new‐born lambs.

17 December 2014 in Journal of Applied Animal Welfare Science
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Fernando MataFernando Mata
Fernando Mata
CJClaire Johnson
Claire Johnson
CBCharlotte Bishop
Charlotte Bishop
Bit and bridle accessories improperly fitted in ridden horses can cause oral trauma such as bone spurs, commissure ulceration, and tongue lacerations. This study was used to identify, grade, and compare the types of oral traumas commonly found within polo ponies and race horses. Injuries were assessed visually and by palpation on the tongue, lips' commissures, and interdental space. A total of 50 polo ponies and 50 race horses were sampled in the South of England. A Poisson model was successfully fitted to the data (p < .001), and the variables of discipline (p < .001), injury type (p < .001), and age (p < .001) were significant. Race horses with snaffle bits were predisposed to significantly higher severities and prevalence of oral trauma than were polo ponies in gag bits. Only polo ponies were observed with tongue trauma. Race horses had higher severities of injuries in the commissures and bone spurs. Positive correlations were found between age and/or time in sport and induced biting injuries. Polo ponies had been playing longer before the occurrence of injuries.

7 April 2023 in Sustainability
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BSBrenda Lohanny Passos Santos
Brenda Lohanny Passos Santos
Meirielly Santos JesusMeirielly Santos Jesus
Meirielly Santos Jesus
Fernando MataFernando Mata
Fernando Mata
APAline Alves Oliveira Santos Prado
Aline Alves Oliveira Santos Prado
IVIsabela Maria Monteiro Vieira
Isabela Maria Monteiro Vieira
DSDaniel Pereira Silva
Daniel Pereira Silva
Biosurfactants have attracted considerable attention because of their lower toxicity, biocompatibility, and effectiveness over chemical surfactants. The use of renewable sources and the concept of sustainable production for such biomolecules supports the increased demand for eco-friendly products. Herein, the present study investigated corncobs (CC) and sunflower stalks (SS) as substitutes for conventional substrates in submerged fermentation with B. subtilis. The agro-industrial residues were submitted to an alkaline pretreatment to obtain hydrolysates rich in hemicelluloses, whose concentrations were determined at 48.8% and 65.7% for corncob and sunflower stalk liquors, respectively. The influence of different concentrations of glucose (0, 2.5, and 5%) and liquor (0, 20%, and 40%) were evaluated according to cell concentration, surface tension reduction rate (STRR), and emulsification index (EI24). Biosurfactants obtained with the hemicellulose liquor of sunflower stalk showed the highest cell concentration (4.57 g/L) and STRR (58.07%), whereas the maximum values of EI24 (56.90% in hexane, 65.63% in toluene, and 64.86% in kerosene) were achieved by using corncob liquor. All top results were observed at 2.5% glucose, 20% liquor (CC or SS), and 1% mineral salts. Notably, excess glucose or liquor (CC or SS) negatively affected cell growth and biosurfactant performance. The results indicated the potential of corncobs and sunflower stalks as low-cost substrates to produce a high added-value biosurfactant with promising tensoative and emulsifying properties.

23 January 2025 in Foods
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TMTeresa Madureira
Teresa Madureira
FNFernando Nunes
Fernando Nunes
JVJosé Veiga
José Veiga
Fernando MataFernando Mata
Fernando Mata
Maria ALEXANDRAKIMaria ALEXANDRAKI
Maria ALEXANDRAKI
EMEleni Malissiova
Eleni Malissiova
Consumer interest in organic food has surged globally, driven by health, sustainability, and ethical considerations. Key factors include perceived safety, nutritional benefits, and environmental impact, while high prices and limited availability remain barriers. This study examines the factors influencing organic food preferences among Greek consumers, focusing on attribute importance, demographic variations, purchasing locations, and regional differences. A sample of 250 consumers was analysed using a best-worst scaling methodology to research the importance of organic food attributes. The two main attributes were then further analysed using ordinal regression models. Health benefits, particularly the absence of chemicals, emerged as the most valued attribute, followed by nutritional value, absence of GMOs, better taste expectations, and environmental impact. Certification showed intermediary importance, and price, country of origin, availability, and natural appearance were found to have lower importance. Women and highly educated individuals show greater recognition of organic food’s health and nutritional advantages. Consumers in rural regions exhibited stronger preferences for organic products, influenced by cultural traditions, trust in local sourcing, and economic accessibility, while urban consumers displayed more scepticism. For the Greek participants included in the study, supermarkets dominate organic food sales due to affordability and convenience.

4 June 2024 in Sustainability
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FVFabrícia Vieira
Fabrícia Vieira
Hortência E. P. SantanaHortência E. P. Santana
Hortência E. P. Santana
Meirielly Santos JesusMeirielly Santos Jesus
Meirielly Santos Jesus
Fernando MataFernando Mata
Fernando Mata
Preciosa de Jesus da Costa PiresPreciosa de Jesus da Costa Pires
Preciosa de Jesus da Costa Pires
DRDenise Santos Ruzene
Denise Santos Ruzene
Pretreatment is an essential step for breaking the recalcitrant structure of lignocellulosic biomass and allowing conversion to high-value-added chemicals. In this study, coconut fiber was subjected to three pretreatment methods to compare their impacts on the biomass’s structural characteristics and their efficiency in fractionating the biomass. This comparative approach was conducted to identify mild biomass pretreatment conditions that efficiently extract lignin and recover cellulose-rich pulp for the production of bioproducts. To this end, autohydrolysis, alkaline, and organosolv pretreatments were performed under different experimental conditions, and the physicochemical properties of the samples were evaluated using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and chemical characterization of the cellulose, hemicellulose, and lignin fractions. Therefore, efficient experimental conditions were identified to pretreat coconut fibers with an extended understanding of the methods to process lignocellulose. Great delignification efficiency and pulp yield were obtained with organosolv > alkaline extraction > autohydrolysis under the selected conditions of 2 h at 185 °C in the presence of a catalyst, namely, 0.5 M NaOH, for 2 h at 55 °C and 20 min at 195 °C, respectively. FT-IR revealed a predominance of hydroxyl groups in fibers obtained from alkaline and organosolv pretreatment, showing higher lignin degradation and cellulose concentration in these samples. TGA revealed mass loss curves with similar behaviors but different patterns and intensities, and MVE analysis showed differences on the surfaces of each sample. The comparison of experimental parameters allowed the identification of suitable conditions for each extraction method, and structural analyses identified the specific characteristics of the fibers that could be obtained according to the method used. Therefore, the results are of great importance for developing sustainable and effective industrial processes.