LEUKAEMIC infiltration of the lacrimal sac is rare (Duke-Elder, 1952) and dacryocystitis due to leukaemic involvement of the sac has seldom been reported (Stokes, 1938; Busina, 1950). The number of cases recorded is increased when the reports of Sulzer and Duclos (1906), Pascheff (1927), and Weve (1928) are considered, but these authors described lymphomata of the sac without the typical blood ...

We study the contribution of glueball and σ-meson degrees of freedom to nucleon excited states in the framework of a chiral version of the chromodielectric model. We have found that these degrees of freedom considerably lower the energy of the Roper and may substantially weaken the electroexcitation amplitudes for the N(1440) and in particular for the N(1710). Among the excited states of the nu...

Mars' surface is characterized by a weathered layer of regolith and exposed rock exposures that are the results long-term geological processes. The Mars Rover Penetrating Radar (RoPeR) on board Zhurong rover China's first mission (Tianwen-1) has been investigating fine structure dielectric properties martian in southern Utopia Planitia. permittivity within 5 m landing zone , average loss tangen...