Diffraction In The Binary Encounter Electron Peak Observed In Collisions Of 0.6 MeV Amu⁻¹ I7+, I23+ And Au11+ Projectiles With He And Ar

Relative double differential cross sections for electron emission from collisions of 0.6 MeV amu-1I7+and I23+ projectiles with Ar and Au11+projectiles with He were measured for electron energies from 100 eV to 2000 eV and for angles from 0° to 50°. Experimentally observed sudden shifts of the position of the binary encounter peak were interpreted as resulting from quantum interference in the scattering of target electrons from the partially stripped projectile ion. To this end calculations for the elastic scattering of free electrons initially at rest in the laboratory reference frame from the screened projectile field as well as model calculations of binary encounter electron production taking into account the target Compton profile were performed and compared with the experimental results. Good agreement was obtained for the angular locations of these shifts as well as for the angular distribution of the binary encounter electron yield. © 1992 IOP Publishing Ltd

Plasmonic DNA: Towards Genetic Diagnosis Chips

"Plasmonics and DNA" special issueInternational audienc

Sphenoid sinus mucocele caused by a completely thrombosed intracavernous carotid artery aneurysm: an unusual association

Background Mucocele is an inflammatory disease caused by the retention of mucoid secretions within a paranasal sinus. Although rare, the presence of a vascular lesion inside the sphenoid sinus could determine ostium obstruction, thus causing mucocele development. Clinical Presentation An 84-year-old woman was referred to our institution due to a lesion abutting into the sphenoid sinus; she was complaining of constrictive frontal headache, progressive worsening of visual acuity in the left eye; later, sudden homolateral ptosis and diplopia occurred. The radiologic evidence was consistent with the diagnosis of thrombosed aneurysm of the right intracavernous carotid artery, surrounded by sphenoidal mucocele. The patient underwent an endoscopic endonasal transsphenoidal approach exclusively for sphenoid mucocele drainage. Conclusion Although rare, the presence of a vascular lesion inside the sphenoid sinus has to be considered among the possible diagnostic hypotheses of masses abutting in this cavity; the association with mucocele is even more rare and, to date, has not been described

OLIGONUCLEOTIDE HYBRIDIZATION OBSERVED BY SURFACE-PLASMON OPTICAL TECHNIQUES

This paper argues that the enduring mystery of colour, in particular its elemental effusiveness, has been tamed and managed by notions of good taste and chic that equate cultural maturity with a limited palette. Yet colour in all its post industrial forms continues to break free of constraints in an audacious display of autopoiesis. The science of colour based on image, mimesis, and the physiology of the eye has missed the phenomenon of colour altogether because it takes place at the incalculable level of shine and radiance. Ontologically colour makes things manifest by revealing them in their unique presence rather than merely facilitating communication, representation or spectacle. Before colour is seen, before light can facilitate a look, colour looks back in such a way that looking and seeing are provoked. Using Thierry de Duve, David Batchelor and Martin Heidegger it will be shown that these ways of being with colour are extended by a formal evolution in painting whereby expanded painting addresses everything in the everyday world that carries colour from data screens to plastic utensils and even paint itself. Ultimately, the medium of painting however deconstructed or expanded, has become the entity to ‘whom’ the work of colour is addressed