Late local recurrence of dermatofibrosarcoma protuberans in the skin of female breast

Dermatofibrosarcoma protuberans (DFSP) of the breast is exceptionally obscure and late local recurrence of this entity on this site is even more uncommon. We describe such a case in a 48-year-old woman, who at the age of 35 had a DFSP excised from her right breast. Thirteen years later, she developed an ovoid mass in her right breast over the postsurgical scar area. Wide local excision of the tumor with generous tissue margin was performed and microscopic and immunohistochemical findings established the diagnosis of recurrent DFSP. No further treatment was administered and she remains well 18 months later, without tumor recurrence. We report an exceptionally rare case of local recurrence of DFSP in the female breast and discuss in detail the diagnostic and therapeutic implications of this pathology

Graphene-Based Systems for Enhanced Energy Storage

Extensive global research efforts have focused on the exploitation of graphene for enhanced energy storage. Novel graphene-based composite material electrodes have been developed, in many cases with reports of outstanding performance. However, the development of these composites involve extremely complex and costly procedures/methods whose scalability and eventual commercial exploitation is extremely hard [1]. Within the present activity the use of graphene nanotechnology is exploited to manufacture electrodes for supercapacitors. The goal however is to achieve electrodes with increased specific energy density (compared to the currently commercially available products) using proven and simple manufacturing procedures that can easily be scaled-up and offer competitive products. The roadmap was developed under the framework of European Space Agency highlighting the main advantages brought up from this technology. The activity is separated in three parallel routes; the development and test planning of small–scale production of graphene based materials via the tape casting technology, the establishment of a reliable and low cost industrial production process (scale-up) for these materials and the development and testing of an energy storage demonstrator that shall incorporate the novel electrodes and exhibit their favorable characteristics in energy storage applications for use in space

Graphene-Based Systems for Enhanced Energy Storage

Extensive global research efforts have focused on the exploitation of graphene for enhanced energy storage. Novel graphene-based composite material electrodes have been developed, in many cases with reports of outstanding performance. However, the development of these composites involve extremely complex and costly procedures/methods whose scalability and eventual commercial exploitation is extremely hard [1]. Within the present activity the use of graphene nanotechnology is exploited to manufacture electrodes for supercapacitors. The goal however is to achieve electrodes with increased specific energy density (compared to the currently commercially available products) using proven and simple manufacturing procedures that can easily be scaled-up and offer competitive products. The roadmap was developed under the framework of European Space Agency highlighting the main advantages brought up from this technology. The activity is separated in three parallel routes; the development and test planning of small–scale production of graphene based materials via the tape casting technology, the establishment of a reliable and low cost industrial production process (scale-up) for these materials and the development and testing of an energy storage demonstrator that shall incorporate the novel electrodes and exhibit their favorable characteristics in energy storage applications for use in space

Solubility of CO₂ and CH₄ in Ionic Liquids: Ideal CO₂/CH₄ Selectivity

A synthetic method has been used to measure the bubble-point pressures of carbon dioxide (CO₂) and methane (CH₄), for a temperature range of 303.15–363.15 K and for pressures up to 14 MPa, in the following ionic liquids: 1-ethyl-3-methylimidazolium diethylphosphate [emim]­[dep], trihexyltetradecylphosphonium bis­(2,4,4-trimethylpentyl)­phosphinate [thtdp]­[phos], trihexyltetradecylphosphonium dicyanamide [thtdp]­[dca], 1-allyl-3-methylimidazolium dicyanamide [amim]­[dca], 1-butyl-1-methylpyrrolidinium dicyanamide [bmpyrr]­[dca], 1,2,3-tris­(diethylamino)­cyclopropenylium dicyanamide [cprop]­[dca], 1,2,3-tris­(diethylamino)­cyclopropenylium bis­(trifluoromethylsulfonyl)­imide [cprop]­[Tf₂N], 1-butyl-1-methylpiperidinium bis­(trifluoromethylsulfonyl)­imide [bmpip]­[Tf₂N], triethylsulfonium bis­(trifluoromethylsulfonyl)­imide [tes]­[Tf₂N], and methyltrioctylammonium bis­(trifluoromethylsulfonyl)­imide [toa]­[Tf₂N]. The solubility of CH₄ on mole fraction basis is a factor of 10 lower than that of CO₂ at similar conditions. Henry constants of CO₂ and CH₄ in all the ionic liquid (IL) systems are presented, from which the ideal CO₂/CH₄ selectivities are obtained. The ideal CO₂/CH₄ selectivities of the investigated ILs are in the range of the conventional solvents like Selexol, Purisol, Rectisol, Fluor Solvent, and sulfolane. The ideal CO₂/CH₄ selectivity decreases dramatically with increasing temperature and increasing IL molecular weight. Furthermore, the experimental data has been modeled accurately with the Peng–Robinson equation of state in combination with van der Waals mixing rules