The aim of this study was determine the volatile compounds, antimicrobial and antioxidant activity of the essential oils (EOs) of cinnamon (Cinnamomum verum), fenugreek seeds (Trigonella foenum greacum), ginger (Zingiber officinale) and marjoram (Origanum majorana) widely consumed in Egypt. EOs showed a great variety of compounds in their chemical compositions, Trans-cinnamyl aldehyde, terpinen...

In the standard model (SM), lepton L and baryon B number conservation take place due to the accidental U(1)L ×U(1)B symmetry existing at the level of renormalizable operators. But, for many extensions of the SM, this is not the case. The well known mechanism of lepton number (LN) violation is based on the mixing of massive Majorana neutrinos predicted by various Grand unified theories (GUTs) [1...

We study the mixing of elementary and composite particles. In quantum field theory the mixing of composite particles originates in the couplings of the constituent quarks and for neutrinos in self–energy diagrams. In the event that the incoming and outgoing neutrinos have different masses, the self–energy diagrams vanish because energy is not conserved but the finite decaying widths make the mi...