Percorrer por autor "Machado, P."
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- Comparison between sensory descriptors and flavour compounds in an ovine Portuguese traditional cheese (Serra da Estrela)Publication . Franco, M. I.; Machado, P.; Teixeira, S.; Monteiro, M. J.; Tavaria, F.; Ferreira, A. C.; Pintado, M. E.; Malcata, F. Xavier
- Dysregulated behaviors in bulimia nervosa – a case-control studyPublication . Gonçalves, Sónia Ferreira; Machado, Bárbara César; Martins, Carla; Machado, P.Background: Bulimia nervosa is often related to self-control difficulties and to self-harm behaviors. This study aimed to evaluate the frequency of self-injurious behavior, suicide attempts and other behaviors’ related to impulsivity in bulimia nervosa, using two control groups (a healthy group and a general psychiatric group), and also to examine the association between sexual abuse and parasuicide behaviours in bulimia nervosa. Method: Women (N =233) aged between 13 to 38 years old were evaluated using the Risk Factors for Eating Disorders Interview Schedule (RFI; Fairburn et al., 1998). Results: Participants with bulimia nervosa reported more self-injurious behaviours, suicide attempts by drug intake, and poor control in smoking and drugs use compared with participants in both control groups. Bulimia nervosa group also presented more spending behaviors’ compared with the general psychiatric control group. No association was found between sexual abuse and parasuicide behaviors amongst bulimia nervosa participants. Conclusions: This study concluded that BN is commonly related to self-harm behaviours, and clinicians must take into account the multi-impulsive spectrum behaviours of BN in their evaluation and treatment of BN.
- Migration of two antioxidants from packaging into a solid food and into TenaxPublication . Reinas, I.; Oliveira, J.; Pereira, J.; Machado, P.; Poças, M. F.The migration of chemicals from packaging materials into foods is an important issue in food safety and quality. European legislation sets specific migration limits which compliance must be assessed, surveyed and controlled by industry and authorities. Recently, the new Regulation UE 10/2011 included a new simulant - the Modified Polyphenylene Oxide (Tenax ) for solid dry foods. The objective of this work was to compare the migration kinetics of two antioxidants into Tenax as compared to rice at 3 temperatures: 23, 40 and 70 C. The application of two different solutions of the 2nd Fick’s law to describe and simulate the migration of the migrants to the present systems was studied. Diffusion coefficients ranged between 4.80E-13 and 2.84E-11 cm2/s for the migration into Tenax and between 6.90E-18 and 4.33E-17 cm2/s for the migration into rice. The partition coefficients ranged between 6 and 29 for Tenax and were over 1000 for rice. The activation energy for the migration into rice was half of that for Tenax . The models described relatively well the experimental data (ε < 12% and < 30% for rice and Tenax , respectively). Results indicate that the food simulant tends to overestimate migration values and thus can be safely used to assess materials compliance when materials are intended to contact with rice. However, results also indicate that Tenax is a much more severe simulant in representing rice.
- Parental high expectations and childhood overweight as risk factors for bulimia nervosa: a portuguese case-control studyPublication . Gonçalves, S.; Machado, B. C.; Martins, C.; Hoek, H. W.; Machado, P.Aims: To identify the risk factors implicated in the development of bulimia nervosa and determine which of these risk factors are especially common among bulimia nervosa subjects compared with healthy subjects and subjects with other psychiatric disorders. Design: A case-control design was used involving the comparison of 60 female subjects who meet DSM-IV criteria for bulimia nervosa with 60 healthy control subjects and 60 subjects with other psychiatric disorders. Risk factors were assessed by interviewing each subject with the Oxford Risk Factor Interview. Results: The main risk factors identified from the comparison of bulimia nervosa subjects with healthy controls were high parental expectations and adolescence obesity. Compared with subjects with other psychiatric disorders, those with bulimia nervosa reported also childhood obesity. Discussion: Overweight in infancy and adolescence and the exposure to family functioning variables like high expectations increased the risk for the development of bulimia nervosa.