We have demonstrated a method to disperse and exfoliate graphite to give graphene suspended in water-surfactant solutions. Optical characterisation of these suspensions allowed the partial optimisation of the dispersion process. Transmission electron microscopy showed the dispersed phase to consist of small graphitic flakes. More than 40% of these flakes had <5 layers with ~3% of flakes consist...

Modelling the direct effect of aerosols in the solar near-infrared on a planetary scale N. Hatzianastassiou, C. Matsoukas, A. Fotiadi, E. Drakakis, P. W. Stackhouse Jr., P. Koepke, K. G. Pavlakis, D. Hatzidimitriou, and I. Vardavas Laboratory of Meteorology, Department of Physics, University of Ioannina, 45110 Ioannina, Greece Foundation for Research and Technology-Hellas, Heraklion, Crete, Gre...

Aerosol size distributions are presented for a winter intensive study at the Fresno Supersite. The size distributions were consistent with and predictive for continuous PM2.5 measured by beta attenuation. They varied temporally with respect to source type and intensity, with the smallest mean diameters associated with high NOx concentrations during weekday morning rush hours. Conversely, small ...

A Reply to the Comment by S. Skanthakumar, J. W. Lynn, and I. W. Sumarlin, Phys. Rev. Lett. 74, 2842 (1995).

may be because cases of gul dependence are usually not brought for consultation to the psychiatrists. It has been our experience that there is usually an increase in the symptomatic abuse of this product in psychotic disorders and episodes of depressive illness. This report is an effort to bring to the notice of researchers in the field of psychiatry and related fields, the endemic abuse of thi...

This study examines the role of observation during the formation of triads in female domestic hens. Results indicate that during hierarchy formation, a hen observing agonistic interactions and conflict settlement between its former dominant and a stranger uses this information when in turn confronted by the latter. Under a first condition (E, N=15 triads), bystanders witnessed their prior domin...

We examined the effect of prior victory or defeat in the same site as that of a subsequent encounter on the outcome of dyadic encounter of domestic hens by placing them in two situations: In the first set of dyads, two unacquainted hens having experienced prior victory were introduced in the site where one had experienced victory. In the second set, two unacquainted hens having experienced defe...