A5013930142- Postharvest Quality and Shelf Life Management
- Phytochemicals and Antioxidant Activities
- Polysaccharides and Plant Cell Walls
- Plant Physiology and Cultivation Studies
- Horticultural and Viticultural Research
- Polysaccharides Composition and Applications
- Bee Products Chemical Analysis
- Insect and Pesticide Research
- Fermentation and Sensory Analysis
- Botanical Research and Applications
- Food Drying and Modeling
- Anaerobic Digestion and Biogas Production
- Recycling and Waste Management Techniques
- Composting and Vermicomposting Techniques
- Odor and Emission Control Technologies
- Microbial Metabolites in Food Biotechnology
- Freezing and Crystallization Processes
- Rural Development and Agriculture
- Healthcare and Venom Research
- Essential Oils and Antimicrobial Activity
- GABA and Rice Research
- Microbial Inactivation Methods
- Genomics, phytochemicals, and oxidative stress
- Microencapsulation and Drying Processes
- Waste Management and Recycling
Polytechnic Institute of Viseu
2016-2025
University of Aveiro
2002-2025
Rede de Química e Tecnologia
2019-2025
Research Center for Natural Resources, Environment and Society
2024-2025
University of Trás-os-Montes and Alto Douro
2019-2024
AgroBio
2019
Apple pomace is a by-product of apple processing industries with low value and thus frequent disposal, although valuable compounds. Acidified hot water extraction has been suggested as clean, feasible, easy approach for the recovery polyphenols. This type allowed us to obtain 296 g extract per kg dry pomace, including 3.3 polyphenols 281 carbohydrates. Ultrafiltration solid-phase using C18 cartridges that, in addition native detected by ultra-high-pressure liquid chromatography coupled...
The composition of phenolic compounds a Portuguese pear cultivar (Pyrus communis L. var. S. Bartolomeu) was determined by HPLC after thioacidolysis. average concentration in harvested at commercial maturity stage 3.7 g per kg fresh pulp. Procyanidins were the predominant phenolics (96%), with mean degree polymerization (mDP) 13−44; hydroxycinnamic acids (2%), arbutin (0.8%), and catechins (0.7%) also present. most abundant monomer procyanidin structures (−)-epicatechin (99%), which found as...
It is estimated that in Portugal per year, 132 kg/person of food wasted due to imperfections weight, shape and their perishability, resulting foods cannot be marketed. Solar drying can used extend life. However, it usually does not meet the current productivity quality requirements dried product. energy renewable, very available Portugal, which make an important contribution reducing specific consumption carbon footprint intensity associated with drying. This work aims optimize process using...
To study structure-function relationships of pectic polysaccharides with their immunostimulatory activity, broccoli by-products were used. Pectic composed by 64 mol% uronic acids, 18 Ara, and 10 Gal, obtained hot water extraction, activated B lymphocytes in vitro (25-250 μg/mL). disclose active structural features, combinations ethanol chromatographic fractionation modification the performed. Polysaccharides insoluble 80 % (Et80) showed higher activity than pristine mixture, which was...
Figs are highly perishable, with significant losses due to overripening or failure meet market standards. Drying is essential extending their shelf life and reducing food waste. This study evaluated the impact of traditional sun drying hybrid solar on quality dried “Pingo de Mel” figs. Sun required 5–7 days, while completed process in 3 days. Both methods resulted a similar final moisture content (29.43% 28.14%, respectively), water activity (0.68 0.63, hardness (2.36 2.61 N, respectively)....
ABSTRACT Increase in the atmospheric carbon dioxide concentration ([CO 2 ]) enhanced of carbohydrates rice grains, according to results a previous study. However, its impact on other quality traits is little known. To investigate effect CO levels (375 and 550 μmol/mol) quality, field experiment was conducted with open‐top chambers. Elevated [CO ] affected several nutritional parameters grain. Whereas α‐linolenic acid increased, that linoleic γ‐linolenic acids decreased. For example,...
Elderberry (Sambucus nigra L.) juice concentrate is highly rich in polyphenols, particularly anthocyanins and flavonols, which have been associated with a wide range of health-promoting properties. Phenolic compounds, particular anthocyanins, are unstable may change during storage, might influence the product color quality its potential health effects. The aim this study was to evaluate changes polyphenols profile elderberry produced at an industrial scale seven months storage 5 °C room...
Slurry storage is a significant source of NH3 and greenhouse gas (GHG) emissions. The aim this laboratory study was to assess the effects different chemical additives biochars on emissions NH3, N2O, CO2, CH4 during short-term pig slurry. experiment performed using Kilner jars filled with raw slurry as control six treatment (5% w/w): acidified slurry, alkalinized neutralized agroforestry biochar, cardoon elderberry biochar. were measured for 30 days, composition slurries determined. During...
Composting is one of the best organic waste management techniques, with zero waste; however, it generates environmental impacts. The objective this study was to evaluate emission NH3, N2O, CO2, and CH4 from composting olive, elderberry, grape agro-food waste. experiment carried out using reactors receiving straw as control three treatments mixtures or wastes. gas emissions were measured for 150 days, composition composts determined. results showed NH3 reduced by 48% 29% Olive Elderberry...
Regional varieties of apples present an endogenous patrimony that should be preserved and promoted to guarantee biodiversity genetic resources. In the work, Texture Profile Analysis (TPA) was performed fourteen different regional varieties, having in consideration spatial geometry fruits, textural parameters: hardness, adhesiveness, springiness, cohesiveness, chewiness were assessed. The samples perform TPA's obtained from locations fruit–external internal–and considering axial radial...
"Pera Rocha do Oeste" is a pear (Pyrus communis L.) variety native from Portugal with Protected Designation of Origin (PDO). To supply the world market for almost all year, fruits are kept under controlled storage. This study aims to identify which classical physicochemical parameters (colour, total soluble solids (TSS), pH, acidity, ripening index, firmness, vitamin C, phenols, protein, lipids, fibre, ash, other compounds including carbohydrates, and energy) could be fingerprint markers PDO...
The storage of animal manure is a major source gaseous emissions. aim this study was to evaluate the effects biochar and clinoptilolite on composition emissions during separated liquid fraction pig slurry. experiment carried out using containers with 6 L slurry each. additives were added alone mixed at rate 2.5% each, in total four treatments three replicates including control. Gaseous monitored by photoacoustic multigas monitor, samples collected 0 85 days their assessed. Results showed...