3-(m-Tolyloxy)phthalonitrile

-"'m 3 : >&% M

Log(m Pl /m 3/2 )

Flux compactifications of string theory seem to require the presence of a fine-tuned constant in the superpotential. We discuss a scheme where this constant is replaced by a dynamical quantity which we argue to be a ‘continuous Chern– Simons term’. In such a scheme, the gaugino condensate generates the hierarchically small scale of supersymmetry breakdown rather than adjusting its size to a con...

3-(m-Tol­yloxy)phthalonitrile

In the mol-ecule of the title compound, C(15)H(10)N(2)O, the dihedral angle between the two benzene rings is 65.49 (9)°.

New M +, M 3+-arsenates – the framework structures of AgM 3+(HAsO4)2 (M 3+ = Al, Ga) and M +GaAs2O7 (M + = Na, Ag)

The crystal structures of hydro-thermally synthesized silver(I) aluminium bis-[hydrogen arsenate(V)], AgAl(HAsO4)2, silver(I) gallium bis-[hydrogen arsenate(V)], AgGa(HAsO4)2, silver gallium diarsenate(V), AgGaAs2O7, and sodium gallium diarsenate(V), NaGaAs2O7, were determined from single-crystal X-ray diffraction data collected at room temperature. The first two compounds are representatives o...

Erbium 3 - m Fiber Lasers

With its recent breakthrough in terms of output power, the erbium 3m fiber laser has become an object of intense scientific research and an increasingly attractive tool for medical applications. This paper reviews the research on the erbium 3m fiber laser since its first demonstration. Its development is seen in relationship to the early success of the corresponding crystal laser system, to the...