This paper introduces a model for blu¢ng that is relevant when bets are sunk and only actions -not valuationsdetermine the winner. Predictions from poker are invalid in such nonzero-sum games. Blu¢ng (respectively Sandbagging) occurs when a weak (respectively strong) player seeks to deceive his opponent into thinking that he is strong (respectively weak). A player with a moderate valuation shou...

Recently, it was shown that genuine Ng-Ng chemical bonds are present in the endohedral fullerenes Ng(2)@C(60) in the case of Ng=Xe, while it is more debatable whether a chemical bond exist for Ng=Ar and Kr. The lighter homologues with helium and neon are weakly bonded van der Waals complexes. The presence of a noble gas dimer inside the cage is expected to modify the exohedral reactivity of the...

Allergic reactions to metals and metal salts used in pigments for tattoos are surprisingly frequent. The objective of this study was to quantify the metal content of tattoo inks using the sector field inductively coupled plasma mass spectrometry analysis (SF-ICP-MS). The inks were subjected to a robust microwave digestion in a mixture of nitric and fluoridric acids, and hydrogen-peroxide. A tot...

Background Melasma is a common, chronic skin condition of hyperpigmentation involving the appearance symmetric and irregular light brown macules patches, mainly on sun exposed head neck. Though pathogenesis not fully understood, hyperfunctional melanocytes are known to deposit excess melanin in epidermis dermis. Known risk factors or triggers include genetic influence, hormonal ultraviolet radi...

Melasma is a common, chronic skin condition of hyperpigmentation involving the appearance symmetric and irregular light brown macules patches, mainly on sun exposed head neck. Though pathogenesis not fully understood, hyperfunctional melanocytes are known to deposit excess melanin in epidermis dermis. Known risk factors or triggers include genetic influence, hormonal ultraviolet radiation. Due ...