2008
Autores
Barrias, A; Cunha, F; Varajão, J; Cunha, A;
Publicação
Proceedings of the IADIS International Conference on e-Society 2008
Abstract
A smart house is usually described as an interactive house where information and communications technology is used to support the daily tasks of its inhabitants. One of the important components of a family house context is the food storeroom or pantry. In a fully smart house, the pantry should also be supported by information technologies, as it happens with the others components of the house. By other means, in a fully smart house, the pantry should be smart too. In this paper we present an UML specification for a smart pantry management system. We also discuss all the process that was followed to identify the system requirements, to build the systems models and to create the system prototype. As final remarks we present some guidelines for the future development of a complete smart pantry system. © 2008 IADIS.
2008
Autores
Basto, V; Varajao, J; Cunha, A;
Publicação
ICE-B 2008: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON E-BUSINESS
Abstract
It is well known, widely accepted, scientifically proved and published by major governmental and non-governmental organizations worldwide (e.g. WHO - World Health Organization), that nutritional misbehaviour in so called developed countries, is a major cause of diseases, morbidity and death. The phenomenon is mainly felt in aged populations, but a significant increase has also been detected more recently in young populations. This paper presents a proposal to tackle serious social and behavioural problems related to aging and nutrition. NutriMe is presented as a nutritional monitoring and advising system to help individuals to monitor and correct their behaviours. We also propose NutriMe as the main component for a public national observatory on nutritional profiles for public health analysis purposes.
2008
Autores
Martins, RC; Lopes, VV; Vicente, AA; Teixeira, JA;
Publicação
FOOD AND BIOPROCESS TECHNOLOGY
Abstract
Shelf-life is defined as the time that a product is acceptable and meets the consumers expectations regarding food quality. It is the result of the conjunction of all services in production, distribution, and consumption. Shelf-life dating is one of the most difficult tasks in food engineering. Market pressure has lead to the implementation of shelf-life by sensory analyses, which may not reflect the full quality spectra. Moreover, traditional methods for shelf-life dating and small-scale distribution chain tests cannot reproduce in a laboratory the real conditions of storage, distribution, and consumption on food quality. Today, food engineers are facing the challenges to monitor, diagnose, and control the quality and safety of food products. The advent of nanotechnology, multivariate sensors, information systems, and complex systems will revolutionize the way we manage, distribute, and consume foods. The informed consumer demands foods, under the legal standards, at low cost, high standards of nutritional, sensory, and health benefits. To accommodate the new paradigms, we herein present a critical review of shelf-life dating approaches with special emphasis in computational systems and future trends on complex systems methodologies applied to the prediction of food quality and safety.
2008
Autores
Amaral, JS; Valentao, P; Andrade, PB; Martins, RC; Seabra, RM;
Publicação
MOLECULES
Abstract
Walnut leaves from nine different cultivars (Arco, Franquette, Hartley, Lara, Marbot, Mayette, Meylannaise, Parisienne and Rego) were studied for their phenolic compounds. Samples were harvested along three consecutive years, at two different geographical locations, in order to evaluate if significant differences in the phenolics composition can be related with genetic, climatic or geographical factors. Nine compounds (3-caffeoylquinic, 3-p-coumaroylquinic and 4-p-coumaroylquinic acids, quercetin 3-galactoside, quercetin 3-arabinoside, quercetin 3-xyloside, quercetin 3-rhamnoside, a quercetin 3-pentoside derivative and a kaempferol 3-pentoside derivative) were quantified using an HPLC-DAD methodology. The qualitative profiles were identical for all samples, but differences were observed in terms of individual compounds' contents. Multivariate statistical analysis was carried out, showing that significant differences exist among production years, which can be related to climatic reasons.
2008
Autores
Pereira, RN; Martins, RC; Vicente, AA;
Publicação
JOURNAL OF DAIRY SCIENCE
Abstract
The disruption of the milk fat globule membrane can lead to an excessive accumulation of free fatty acids in milk, which is frequently associated with the appearance of rancid flavors. Solid-phase microextraction and gas chromatography techniques have been shown to be useful tools in the quantification of individual free fatty acids in dairy products providing enough sensitivity to detect levels of rancidity in milk. Therefore, the aim of this study was to characterize the short-chain and medium-chain free fatty acid profile in i) raw untreated goat milk; ii) raw goat milk passing through pumps and heating units (plate-and-frame heat exchanger and ohmic heater); and iii) processed goat milk by conventional and ohmic pasteurization to determine the influence of each treatment in the final quality of the milk. Multivariate statistical analysis has shown that the treatments studied were not responsible for the variability found on free fatty acid contents. In particular, it was possible to conclude that ohmic pasteurization at 72 C for 15 s did not promote an extended modification of free fatty acid contents in goat milk when compared with that of conventional pasteurization. Furthermore, principal component analysis showed that the capric acid can be used to discriminate goat's milk with different free fatty acid concentrations. Hierarchical cluster analysis showed evidence of the existence of correlations between contents of short and medium chain free fatty acids in goat milk.
2008
Autores
Martins, RC; Lopes, VV; Valentao, P; Carvalho, JCMF; Isabel, P; Amaral, MT; Batista, MT; Andrade, PB; Silva, BM;
Publicação
NATURAL PRODUCT RESEARCH
Abstract
The main purpose of this study was the characterisation of 'Serra da Lousa' heather honey by using novel statistical methodology, relevant principal component analysis, in order to assess the correlations between production year, locality and composition. Herein, we also report its chemical composition in terms of sugars, glycerol and ethanol, and physicochemical parameters. Sugars profiles from 'Serra da Lousa' heather and 'Terra Quente de Tras-os-Montes' lavender honeys were compared and allowed the discrimination: 'Serra da Lousa' honeys do not contain sucrose, generally exhibit lower contents of turanose, trehalose and maltose and higher contents of fructose and glucose. Different localities from 'Serra da Lousa' provided groups of samples with high and low glycerol contents. Glycerol and ethanol contents were revealed to be independent of the sugars profiles. These data and statistical models can be very useful in the comparison and detection of adulterations during the quality control analysis of 'Serra da Lousa' honey.
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