[Primary mucinous carcinoma of the eyelid. Case report]. / Carcinome mucineux primitif palpébral. À propos d'un cas.

Primary cutaneous mucinous carcinoma, a tumor of the sweat glands, is a rare tumor localized to the eyelid in 40% of cases. We report a case of a primary cutaneous mucinous carcinoma of the upper eyelid in a 53-year-old Caucasian male who appeared to have a chalazion. Histology showed rows and lobules of epithelial cells with discretely anisonucleotic nuclei and few mitotic figures scattered throughout the tumor cells, surrounded by a mucoid substance. Immunohistochemical analysis was cytokeratin 7 positive and cytokeratin 20 negative, and imaging and endoscopic screening were negative for metastasis, favoring the diagnosis of primary cutaneous mucinous carcinoma. Despite a high recurrence rate of about 35%, this type of tumor displays an indolent course, and metastatic spread is very rare.

[French Guyana's case of renal pseudotumor caused by actinomycosis]. / Un cas guyanais d'actinomycose rénale pseudotumorale.

We report one case of renal pseudotumor caused by actinomycosis with cutaneous fistula in a young French Guyana's boy. Diagnosis before surgery and histology is difficult. CT is the best examination to evaluate the extent of the disease. A short review of the literature is presented.

Acceleration of pH variation in cloudy apple juice using electrodialysis with bipolar membranes.

The purpose of this study was to accelerate pH variation in cloudy apple juice using electrodialysis (ED). The testing was conducted using two ED configurations. The bipolar and cationic membrane configuration showed that reducing the spacing from 8 to 0.75 mm had little effect on treatment time, whereas stacking eight bipolar membranes reduced acidification time by 30%, although the treatment still took too long (21 min). Furthermore, it was not possible to acidify apple juice to a pH of 2.0 to completely inhibit enzymatic browning. The bipolar and anionic membrane configuration helped to accelerate the acidification step by a factor of 3, increasing the yield from 3.3 to 10 L of juice/m(2) membrane/min. Moreover, treatment time was inversely proportional to the size of the membrane stack. The speed at which the pH of acidified juice returned to its initial value was, however, 4 times slower than the speed of acidification, giving a yield of 2.5 L of juice/m(2) membrane/min. By accelerating the acidification step, ED treatment with bipolar and anionic membranes results in more effective polyphenol oxidase activity and more rapid control of juice browning at pH 2.0. Also, the treatment has very little effect on the chemical composition and organoleptic quality of apple juice.

The monolayer technique as a tool to study the energetics of protein-protein interactions.

In this paper, we explore the possibility of using the monolayer technique and hydrophobic homopolypeptides to study the energetics of protein stability. We have studied the stabilization of the bilayer state of poly-L-alanine in its alpha-helical conformation at the air-water interface by measuring compression and expansion surface pressure (II)-residual area (A) isotherms at 22 +/- 2 degrees C. The Gibbs free energy of stabilization per alanyl residue transferred from the water exposed state in the monolayer to the inside of the bilayer was calculated from the surface area of the hysteresis loops obtained during compression-expansion cycles performed during the monolayer to bilayer transition. Using atomic solvation parameters and the water accessible surface area per atom group for an alanyl residue in a standard alpha-helix, we have dissected the free energy of stabilization per alanyl residue into the change of solvation free energy (delta Gs) upon transfer from the water surface to the inside of the bilayer state, and the free energy associated to the formation of hydrophobic van der Waals interactions (delta GvdW) in the bilayer. We estimate a value of 25 +/- 4 cal/(mol A2) for the hydrophobic interaction, as defined by the sum of delta Gs and delta GvdW per unit of hydrophobic (aliphatic) accessible surface area in an alanyl residue.

A precise investigation on the TL behavior of LiF: Mg, Cu, P (GR-200A).

LiF: Mg, Cu, P is a TL material presenting unique dosimetric features. The TL sensitivity of this material was studied as a function of the annealing temperature and of the repeated cycles of annealing-irradiation-readout. A fading study was carried out over a period of 40 days with the purpose of checking the stability of the stored dosimetric information as a function of different annealing temperatures. A detailed statistical analysis of sets of data, obtained from repeated measurements on a group of ten dosimeters, is presented.