Nowadays, it is known that every action made with the aim of contributing to reverse the global warming is appreciated according to its intrinsic value. Through the effect of economies of scale, together, the little actions made elsewhere are significant. If each person or every family in any area uses solar energy in all its domestic activities, the damage due to energy consumption in the world will be very low. This paper presents the command of an autonomous single phase converter with shifted command used to stabilize the energy produce by the photovoltaic cells in regard of the normal condition of usage. This shifted command aids in modifying the characteristics of the output voltage, particularly the effective value of its fundamental without involving the continue voltage of its energy supply. In multiple applications, it can be used in the energy supply of sensible devices like non synchronous machines. When this is jointed to a pump, it can produce drinking water by a tangential ultrafiltration unit of water with a perforated fiber. When it is combined to the command of the static converter of Mc Murray Bedford which is constituted of a monostich and a dephaser, commanded by the mutual inductance in order to obtain of a tension too close.

The objective of this work consisted in studying the procedures of the manufacture of beer from sorghum, in order to be able to put forward its qualities and to develop the local bittering substances such as Vernonia amygdalina and Nauclea diderrichii. In this study, Safrari sorghum cultivar was malted and brewed under laboratory controlled conditions. Different types of beers were manufactured using combinations of Vernonia amygdalina and Nauclea diderrichii as tropical hops. The extract, reducing sugars, free amino nitrogen (FAN) of worts hopped with Vernonia amygdalina and Nauclea diderrichii was respectively from: 16