Abstract: A method for dewatering dispersions of suspended solids by flocculation, using a polymeric flocculant, includes the steps of sequentially adding to the dispersions: at least one water soluble, anionic linear polymer having a molecular weight of at least 1×106 g/mol; and a blend of a water-soluble, cationic structured first polymer having a molecular weight of at least 1×106 g/mol, and a water-soluble, cationic linear second polymer having a molecular weight of at least 1×106 g/mol.

Abstract: The present invention provides, in at least one embodiment, a fault indicator powered by a capacitive power source. The capacitive power source can be a charged capacitor which can be charged by an electrostatic field and an electromagnetic field around a power line being monitored. The charged capacitor can be an electrochemical double-layer capacitor, a supercapacitor, or an ultracapacitor. These capacitors provide superior energy storage compared to conventional battery power sources.

Abstract: Positive-negative selector (PNS) vectors are provided for modifying a target DNA sequence contained in the genome of a target cell capable of homologous recombination. The vector comprises a first DNA sequence which contains at least one sequence portion which is substantially homologous to a portion of a first region of a target DNA sequence. The vector also includes a second DNA sequence containing at least one sequence portion which is substantially homologous to another portion of a second region of a target DNA sequence. A third DNA sequence is positioned between the first and second DNA sequences and encodes a positive selection marker which when expressed is functional in the target cell in which the vector is used. A fourth DNA sequence encoding a negative selection marker, also functional in the target cell, is positioned 5? to the first or 3? to the second DNA sequence and is substantially incapable of homologous recombination with the target DNA sequence.

Abstract: A toilet ventilation system includes a flush toilet having a toilet bowl portion including a perimeter wall enclosing an interior of the bowl. A bowl vent inlet extends through a side of the perimeter wall from the interior to the exterior of the bowl at a position above a static water level in the bowl. The bowl vent inlet has an exterior end configured to connect to a vent conduit for drawing odors out of the toilet bowl.