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  • Author or Editor: Alexandru Nicolae x
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In this paper, we argue for the existence of two local domains (phases, cf. Chomsky 2001; 2009; Legate 2003, among others) inside the DP: the n*-phase, parallel to the vP (as in Svenonius 2004), and the d*-phase, parallel to the CP. Two acknowledged phasal properties are discussed. (i) The n*/d*-phases define their own peripheries: peripheries are essentially modal-quantificational spaces, as shown by the decomposition of Topic—Focus features recently proposed (Butler 2004; McNay 2005; 2006). (ii) Phases are assumed to be domains of linearization: after (internal or external) merge, syntactic objects are hierarchical, but not linear, so phases must be linearized before they are sent to PF. The distribution and interpretation of DP-internal adjectives is taken to be indicative of these two domains.

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Abstract

The reduction kinetics with CO of the 12-molybdophosphoric—HPMo, 1-vanado-11-molybdophosphoric—HPVMo acids and their salts with NH4 +, K+ and Cs+ cations were studied for reduction/reoxidation cycles with mixtures of CO:Ar and O2: Ar, by means of “in situ” UV–Vis–DRS measurements. The reflectivity versus time curves registered during the reduction/reoxidation processes for the HPMo and HPVMo and its salts with NH4 +, K+ and Cs+ cations, at the constant wavelength of 620 nm and different reaction temperatures between 523 and 623 K, were processed as the Kubelka–Munk function versus time. The linear shape of Kubelka–Munk function versus time curves for the reduction process suggests apparent zeroth order kinetics and it was used for the calculation of apparent activation energy. The kinetic compensation effect between the apparent activation energy and the pre-exponential factor was observed. The Kubelka–Munk function versus time curves for the reoxidation process consist of two steps, the first with a very fast reaction rate and the second with a slow reaction rate. An explanation for their shape is proposed. The heteropoly oxomolybdates reach a degree of reoxidation higher than heteropoly compounds containing vanadium together with molybdenum.

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