The present invention relates to an emulsion concentrate with content of water-insoluble oil components, of hydrophilic non-ionic emulsifiers, of lipophilic co-emulsifiers, of polyols and water, which comprises less than 50% by weight of water-insoluble oil component \u2014based on the total weight of the concentrate\u2014comprising components, and and in a ratio by weight A:B:C:D=1:::. The constructs are particularly useful for expression of double-stranded RNA in vitro and in vivo. The ends of the beam pivotally engage vertical arms depending downwardly where each of the arms terminates at a mixing plate. A sourceline is formed in a trench adjacent to the vertical floating gate transistor and coupled to the first sourcedrain region.