Proton stopping measurements at low velocity in warm dense carbon.

Ion stopping in warm dense matter is a process of fundamental importance for the understanding of the properties of dense plasmas, the realization and the interpretation of experiments involving ion-beam-heated warm dense matter samples, and for inertial confinement fusion research. The theoretical description of the ion stopping power in warm dense matter is difficult notably due to electron coupling and degeneracy, and measurements are still largely missing. In particular, the low-velocity stopping range, that features the largest modelling uncertainties, remains virtually unexplored. Here, we report proton energy-loss measurements in warm dense plasma at unprecedented low projectile velocities. Our energy-loss data, combined with a precise target characterization based on plasma-emission measurements using two independent spectroscopy diagnostics, demonstrate a significant deviation of the stopping power from classical models in this regime. In particular, we show that our results are in closest agreement with recent first-principles simulations based on time-dependent density functional theory.

Integrated quantitative PIXE analysis and EDX spectroscopy using a laser-driven particle source.

Among the existing elemental characterization techniques, particle-induced x-ray emission (PIXE) and energy-dispersive x-ray (EDX) spectroscopy are two of the most widely used in different scientific and technological fields. Here, we present the first quantitative laser-driven PIXE and laser-driven EDX experimental investigation performed at the Centro de Láseres Pulsados in Salamanca. Thanks to their potential for compactness and portability, laser-driven particle sources are very appealing for materials science applications, especially for materials analysis techniques. We demonstrate the possibility to exploit the x-ray signal produced by the co-irradiation with both electrons and protons to identify the elements in the sample. We show that, using the proton beam only, we can successfully obtain quantitative information about the sample structure through laser-driven PIXE analysis. These results pave the way toward the development of a compact and multifunctional apparatus for the elemental analysis of materials based on a laser-driven particle source.

[Eyelid sebaceous carcinoma. A case report with literature review]. / Carcinome sébacé des paupières. A propos d'un cas et revue de la littérature.

Sebaceous carcinoma of the eyelids is a rare malignancy of which most cases require extensive excision followed by usually complete eyelid reconstruction. We report a case developed from the Meibomius glands of the lower eyelid. Complete excision was achieved by removing the entire eyelid 'en bloc'. Reconstruction was with a composite, chondromucosal septal graft layered on an upper eyelid, musculocutaneous, transposition flap based on a lateral pedicle. After a brief review of the relevant literature, the advantages and disadvantages of the various methods of complete lower eyelid reconstruction are discussed.

Lengthening temporalis myoplasty and lip reanimation.

The authors report a new surgical technique of myoplasty of the temporalis muscle applied to the treatment of permanent peripheral facial paralysis. It consists of a muscle lengthening, using the totality of the temporalis muscle and the transfer of its tendon attached to the coronoid process directly to the lips, therefore modifying the temporal fixed point and respecting the deep temporal pedicles. Ten cadaver dissections were performed for a better understanding of the muscle fiber redistribution during surgery to measure the distance between coronoid process and lip commissure and to measure the width of the temporal tendon. The results in 10 patients have been very encouraging. This technique was performed on ten cases of permanent facial paralysis of various etiologies, by the same surgeon, with a 4-year follow-up.

[Epithelioma cuniculatum. Apropos of a case in the anterior gingiva with involvement of the mandibular symphyseal bone and reconstruction using a fibular osteocutaneous flap and integrated implants]. / Epithelioma cuniculatum. A propos d'un cas gingival antérieur avec extension osseuse mandibulaire symphysaire et reconstruction par lambeau ostéo-cutané fibulaire et pose d'implants.

We present a case report of an anterior gingival epithelioma cuniculatum in place of teeth 41 and 42, with osseous mandibular extension for which a one time reconstruction with an osteocutaneous free fibula flap was performed with three dental osseointegrated implants. We reviewed the literature on this type of carcinoma and discuss the diagnosis difficulty. Radical surgical treatment is required.

[Lichen and hepatitis C]. / Lichen et hépatite C.

We report a case of lichen planus in a patient with hepatitis C infection and discuss the relationship between these two diseases.

[Basocellular nevomatosis. Follow-up of 3 generations]. / Naevomatose baso-cellulaire. Suivi de trois générations.

We report on Gorlin-Goltz syndrome observed in 4 patients belonging to three generations of the same family. We present the clinical findings and emphasize recent genetic discoveries. We discuss the difficulty in following these patients and propose a series of simple explorations which can be helpful.