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Acta Alimentaria
Authors: A. Pérez-López, P. Navarro, A. Soler, and A. Carbonell-Barrachina

Everyday consumption of fruits and vegetables is associated with a lowered risk of cancer, hypertension and heart diseases due to the various forms of antioxidants present in these foods such as carotenoids. Besides, consumers demand organic products because they are believed to be more flavourful, healthier, and more respectful to the environment. The effects of organic farming on CIEL*a*b* colour, minerals contents, carotenoids composition and sensory quality of Clemenpons mandarin juices were studied. Organic farming of mandarins resulted in juices with higher mineral and carotenoid contents and of better sensory quality. For instance, organic juice contained a total concentration of carotenoids of 17.3 mg l−1 compared to 13.5 mg l−1 of conventional juice. Finally and in general, mandarin juices are good source of some important elements, such as potassium and antioxidants, e.g. β-cryptoxanthin.

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Abstract  

We present examples of the application of the X-ray fluorescence (XRF) to the study of the artistic and cultural patrimony of the Comunidad Valenciana in the following areas: a) Valencian paintings of the XV and XVI centuries; b) silver ornaments coming from Iberian towns (s. III b.C.); c) ink and paper samples in manuscripts and engravings of the XVII and XIX centuries. The non destructive analyses are carried out “in situ” using a XRF system that consists of a tube of X-rays of 50 kV and 1 mA, and a detector of Si(Li) with an energy resolution 140 eV (FWHM at 5.9 keV).

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Recent progress in numerical methods for the determination of thermokinetics

Results of multinational programme on the comparison of the methods

Journal of Thermal Analysis and Calorimetry
Authors: E. Cesari, P. Gravelle, J. Gutenbaum, J. Hatt, J. Navarro, J. Petit, R. Point, V. Torra, E. Utzig, and W. Zielenkiewicz
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