The disassembly of an excited nuclear aggregate is described as a time-dependent decay process in which clusters are continuously and sequentially emitted by the primitive aggregate and those which have already been formed at a given time. The dynamics describe the rate at which the different species are generated as well as the rate at which the system de-excites and expands isotropically in space. The model is applied to the study of sequentially decaying ~~ as a function of the initial excitation energy.

Continuing our work on the terpenoids occurring in plants of the Labiatae family, we report now on the diterpenoids isolated from Amaracus akhdarensis (Ietswaart et Boulos) Brullo et Furnari (syn. Origanum akhdarensis) and Amaracus pampanini Brullo et Furnari, both growing in Libya.

The essential oils from flowers and stems of Helichrysum litoreum collected in the Aeolian archipelago were examined by GC and GC-MS.ˇ-Caryophyllene (24.4%),˛-pinene (23.2%), -curcumene (5.6%) and rosifoliol (3.1%) were the predominant components of flower essential oil. The stem essential oil was almost totally characterized by monoterpene hydrocarbons (ca. 89%), limonene (74.6%) and˛-pinene (12.9%) being the main compounds.

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