9 documents found, page 1 of 1

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On the optimization of carob seed peel extraction using aqueous-based acidic sy...

Medronho, Bruno; boutoub, Oumaima; Duarte, Hugo; Aliaño González, María José; Guerra, Rui; Brazio, António; Gonçalves, Sandra; Romano, Anabela

Carob fruit utilization remains limited, with most of their commercial value derived from locust bean gum, which is obtained from seed endosperm. Efficient extraction requires dehusking, which is traditionally performed under harsh conditions. This study aims to develop and optimize a milder, more sustainable dehusking method while preserving seed quality for industrial applications. Various aqueous-based solve...


Shedding light on carob seeds: a non-destructive approach to assess Dehusking e...

Guerra, Rui; Brazio, António; Gonçalves, Sandra; Romano, Anabela; Medronho, Bruno

The carob tree (Ceratonia siliqua L.) is receiving growing attention for its agro-industrial potential, particularly due to its seeds, which are the source of locust bean gum (LBG), a galactomannan-rich polysaccharide with wide applications in food and pharmaceutical industries. Efficient dehusking of carob seeds is critical to maximize LBG purity and yield, yet current industrial methods pose environmental con...


Sensory evaluation and spectra evolution of two kiwifruit cultivars during cold...

Afonso, Andreia M.; Guerra, Rui; Cruz, Sandra; Antunes, Maria D.

Kiwifruit consumption has increased due to its rich nutritional properties. Although ‘Hayward’ continues to be the main cultivar, others, such as yellow fleshed ‘Jintao’, are of increasing interest. The objective of this research was to evaluate the acceptability and storage performance of these two cultivars. Sensory evaluation of green ‘Hayward’ and yellow ‘Jintao’ kiwifruit were performed along cold storage ...


Spectral analysis, biocompounds, and physiological assessment of Cork Oak leave...

Guerra, Rui; Pires, Rosa; Brazio, António; Cavaco, Ana Margarida; Schütz, Gabriela; Coelho, Ana Cristina

The cork oak tree (<i>Quercus suber</i> L.) symbolizes <i>the Montado</i> landscape in Portugal and is a central element in the country’s social and economic history. In recent decades, the loss of thousands of cork oaks has been reported, revealing the ongoing decline of these agroforestry ecosystems. This emblematic tree of the Mediterranean Basin is host to the soil-born root pathogen <i>Phytophthora cinnamo...


An ultra-low-cost RCL-meter

Inácio, Pedro; Guerra, Rui; Stallinga, Peter

An ultra-low-cost RCL meter, aimed at IoT applications, was developed, and was used to measure electrical components based on standard techniques without the need of additional electronics beyond the AVR<sup>®</sup> micro-controller hardware itself and high-level routines. The models and pseudo-routines required to measure admittance parameters are described, and a benchmark between the ATmega328P and ATmega32U...


Making sense of light: the use of optical spectroscopy techniques in plant scie...

Cavaco, A. M.; Utkin, Andrei B.; Marques da Silva, Jorge; Guerra, Rui

As a result of the development of non-invasive optical spectroscopy, the number of prospective technologies of plant monitoring is growing. Being implemented in devices with different functions and hardware, these technologies are increasingly using the most advanced data processing algorithms, including machine learning and more available computing power each time. Optical spectroscopy is widely used to evalua...


Spatiotemporal modelling of the quality and ripening of two cultivars of "Algar...

Cavaco, Ana M.; Cruz, Sandra P.; Antunes, M. Dulce; Guerra, Rui; Pires, Rosa; Afonso, Andreia M.; Brazio, António; Silva, Leonardo

Algarve Citrus are non-climacteric Protected Geographical Indication (PGI) commodities. They are harvested with minimal levels of juice content (>35 %), soluble solids content (SSC) (>10 %) and maturation index (MI) (>8), as required by the respective PGI normative reference. These internal quality attributes (IQA) are usually determined in small samples of fruit collected from the orchards close to harvest. Th...



A new path integral approximation to photon propagation in turbid media

Neves, Rui; Guerra, Rui

The path integral approach is applied to describe the propagation of photons in bounded homogeneous turbid media. Introducing a new controlled perturbative expansion centred on the diffusion limit, new analytic solutions for continuous wave reflectance and transmittance are determined, as relevant for non-invasive measurements of tissue optical properties based on continuous wave photon migration instruments. A...


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