Abstract: The present invention provides a system that has been devised to overcome the two most important limitations for sustained biological hydrogen production, namely contamination of the microbial hydrogen-producing cultures with methane-producing cultures necessitating frequent re-start-up and/or other methanogenic bacteria inactivation techniques, and the low bacterial yield of hydrogen-producers culminating in microbial washout from the system and failure. The system includes a continuously stirred bioreactor (CSTR) for biological hydrogen production, followed by a gravity settler positioned downstream of the CSTR, which combination forms a biohydrogenator. The biomass concentration in the hydrogen reactor is kept at the desired range through biomass recirculation from the bottom of the gravity settler and/or biomass wastage from the gravity settler's underflow.

Abstract: A method of making a semiconductor device, includes providing a graphene sheet, creating a plurality of nanoholes in the graphene sheet to form a graphene nanomesh, the graphene nanomesh including a plurality of carbon atoms which are formed adjacent to the plurality of nanoholes, passivating a dangling bond on the plurality of carbon atoms by bonding a passivating element to the plurality of carbon atoms, and doping the passivated graphene nanomesh by bonding a dopant to the passivating element.

Abstract: A method of making a semiconductor device, includes providing a graphene sheet, creating a plurality of nanoholes in the graphene sheet to form a graphene nanomesh, the graphene nanomesh including a plurality of carbon atoms which are formed adjacent to the plurality of nanoholes, passivating a dangling bond on the plurality of carbon atoms by bonding a passivating element to the plurality of carbon atoms, and doping the passivated graphene nanomesh by bonding a dopant to the passivating element.

Abstract: The present invention provides a system that has been devised to overcome the two most important limitations for sustained biological hydrogen production, namely contamination of the microbial hydrogen-producing cultures with methane-producing cultures necessitating frequent re-start-up and/or other methanogenic bacteria inactivation techniques, and the low bacterial yield of hydrogen-producers culminating in microbial washout from the system and failure. The system includes a continuously stirred bioreactor (CSTR) for biological hydrogen production, followed by a gravity settler positioned downstream of the CSTR, which combination forms a biohydrogenator. The biomass concentration in the hydrogen reactor is kept at the desired range through biomass recirculation from the bottom of the gravity settler and/or biomass wastage from the gravity settler's underflow.

Abstract: The invention relates to a method for controlling the application of an insecticide on a surface, which comprises the use of an insecticide composition including a pH indicator colorant in an aqueous medium changing the colorless after drying in the air on said surface, and the recoloration of the insecticide composition by remoistering selected areas of the surface to be checked.

Abstract: An apparatus and method are provided for sorting microstructures in a fluid medium employing a receptacle having N regions of columns positioned in the receptacle between an inlet and an outlet thereof. Fluid medium introduced into the receptacle through the inlet passes sequentially through the N regions of columns before exiting through the outlet, wherein N?2. Each region i (i=1 . . . N) of columns of the N regions of columns includes at least one row of columns spaced to define multiple fluidic channels of a respective minimum width Wi. The minimum widths Wi of the multiple fluidic channels of each region decrease in size in the receptacle between regions from the inlet to the outlet thereof.

Abstract: The invention relates to a method for controlling the application of an insecticide on a surface, which comprises the use of an insecticide composition including a pH indicator colorant in an aqueous medium changing the colourless after drying in the air on said surface, and the recoloration of the insecticide composition by remoistering selected areas of the surface to be checked.