Abílio Azenha

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these key points have been previously published; however, some are based on clinicians’ personal intuition and lack any good scientific data at present. In the future, through ongoing research in dermoscopy by clinicians both locally and through the International Dermoscopy Society, the list of key points will undoubtedly evolve as more scientific data(More)
The authors report a study of allergic contact dermatitis in 329 Portuguese children of 14 years or younger. 170 children (64 male and 106 female) reacted to 1 or more allergens. Most of these were in the 11-14 years group. The main allergens were nickel, thimerosal, cobalt, mercury, fragrance-mix and potassium dichromate. Nickel reactivity predominated in(More)
6 female patients with allergic contact dermatitis from textile dyes are described. Lesions were confined to areas in direct contact with the offending garment, mainly where friction and/or pressure occurred. Patch tests were positive to 2 or more disperse dyes. Thin-layer chromatography was carried out on the dyes extracted from fabrics of 3 patients, for(More)
patient developed occupational dermatitis from butylene glycol in a soap (9, 10). 2 large-scale group studies, including 364 and 272 patients, give frequencies of contact allergy to 1,3-butylene glycol of 0.4% and 1.1%, respectively, of patients tested (1, 2). Although 1,3-butylene glycol has been considered a safe cosmetic ingredient and a rare contact(More)
Abstract − In this paper the implementation of several variable structure algorithms in the position/force hybrid control of robotic manipulators is studied. The robustness and performances of the system are analyzed both in terms of time and frequency responses. This paper also studies the impact phenomena and it is demonstrated that the transient(More)