Fátima Pereira

Contact allergy to gold sodium thiosulfate: A comparative study

During 1995, we added gold sodium thiosulfate and potassium dicyanoaurate to the patch test standard series. Our purpose was to compare the reactivity of the gold salts, to determine the frequency of contact allergy to gold in our country, to compare our results with those of the Malmö group and, finally, to try to clarify the clinical relevance. 2853 patients were routinely tested and 168 patients answered a questionnaire similar to that used by the Malmö group. Contact allergy to gold was found in 23 patients; all women: 22 to gold sodium thiosulfate (0.78%). only 1 to potassium dicyanoaurate and 2 to both salts. All reactors had their ears pierced and were exposed to gold jewellery (mainly earrings). Simultaneous allergies to nickel and cobalt were statistically significant in patients with positive patch tests to gold sodium thiosulfate. Atopy was no more common among these patients.

Scaling Analysis for the Tracer Flow Problem in Self-Similar Permeability Fields

The spatial variations in porous media (aquifers and petroleum reservoirs) occur at all length scales (from the pore to the reservoir scale) and are incorporated into the governing equations for multiphase flow problems on the basis of random fields (geostatistical models). As a consequence, the velocity field is a random function of space. The randomness of the velocity field gives rise to a mixing region between fluids, which can be characterized by a mixing length

Pyoderma gangrenosum associated with sclerosing cholangitis, type 1 diabetes mellitus and ulcerative colitis

\ell=\ell(t)

Contact dermatitis due to a cream containing chitin and a Carbitol

. Here we focus on the scale-up problem for tracer flows. Under very general conditions, in the limit of small heterogeneity strengths it has been derived by perturbation theories that the scaling behavior of the mixing region is related to the scaling properties of the self-similar (or fractal) geological heterogeneity through the scaling law

Occupational allergic contact dermatitis from a glue, containing isothiazolinones and N-methylol-chloroacetamide, in a carpenter.

\ell(t)\sim t^{\gamma}

Allergic contact blepharoconjunctivitis caused by phenylephrine, associated with persistent patch test reaction

, where

Allergic contact dermatitis caused by (meth)acrylates in nail cosmetic products in users and nail technicians – a 5-year study

\gamma=\max\{1/2,

Contact dermatitis from barley.

1-\beta/2\}

Contact dermatitis from chamomile tea

;