Abstract: A VCSEL epitaxial structure includes an etched post between an active region and a sacrificial layer. Aa regrowth of sacrificial layer and HCG layer are around the etched post. providing a fully epitaxial grown tunable VCSEL with a small cavity volume, lateral electrical current and optical confinement. The etched post and regrowth provide lateral current and optical confinement, small volume and increased efficiency for more demanding applications, such as very high-speed modulation and coherent communication.

Abstract: A method for detecting ribonucleases uses a reagent fluid containing ribonucleic acid (RNA) tagged with two different affinity tags which is suspended in a buffered solution with a block copolymer surfactant. A plurality of detectable nanoparticles are coated with a receptor that can bind to one of the two affinity tags but not both. A test strip featuring a test line with receptors capable of binding one of the two affinity tags is provided. During the test, a sample containing ribonuclease is mixed with the reagent fluid and the running buffer. As the mixture travels along the strip, it reaches the test line where the nanoparticles are expected to bind. However, ribonuclease reduces this binding, therefore indicating the presence of the enzyme in the sample. This method provides a visual indication of ribonuclease activity based on the interaction and binding patterns of the nanoparticles on the test strip.

Abstract: A process of preparing an aqueous composition comprising a polysilicate, wherein the composition is a substantially uniform liquid when measured at 25° C., comprising the steps of, i) providing an aqueous liquid having a source of silicate, ii) adjusting the pH of the liquid to between about 2 and about 10.5, thereby causing polymerisation of the silicate, iii) allowing sufficient time for the polymerisation to proceed to substantial completion and thereby forming a product comprising gelled material, iv) subjecting the gelled material to sufficient shear to form a substantially uniform liquid. The novel aqueous composition made by this process is useful in the manufacture of paper and paperboard either as a mineral filler or as a retention/drainage aid.

Abstract: A process of preparing an aqueous composition comprising a polysilicate, wherein the composition is a substantially uniform liquid when measured at 25° C., comprising the steps of, i) providing an aqueous liquid having a source of silicate, ii) adjusting the pH of the liquid to between about 2 and about 10.5, thereby causing polymerisation of the silicate, iii) allowing sufficient time for the polymerisation to proceed to substantial completion and thereby forming a product comprising gelled material, iv) subjecting the gelled material to sufficient shear to form a substantially uniform liquid. The novel aqueous composition made by this process is useful in the manufacture of paper and paperboard either as a mineral filler or as a retention/drainage aid.

Abstract: The present invention relates to a method and composition for controlling pitch and stickies deposit in a pulp and papermaking process using amphoteric copolymers of diallyldimethylammonium chloride (DADMAC) with acrylic acid and/or acrylamide and optionally a siliceous material.

Abstract: A process of preparing an aqueous composition comprising a polysilicate, wherein the composition is a substantially uniform liquid when measured at 25° C.

Abstract: A method for storing a disk comprising providing a disk having a disk opening, providing a disk storage container having a base with a disk recess and a hub generally concentrically disposed in the disk recess, and disengaging an end side of a lid from a rear channel of an upright rear wall attached to said base. The method for storing additionally comprises sliding opposed sides of the lid in side channels of opposed upright side walls attached to the base and to the upright rear wall, passing the hub of the disk recess through the disk opening of the disk, and resting the disk on a bottom of the disk recess for storing the disk.

Abstract: Bentonite swelling clay is provided to a paper making mill as a fluid concentrate containing more than 15% bentonite wherein swelling of the bentonite is prevented by inorganic electrolyte in the concentrate, and the bentonite swells upon dilution either before addition of the cellulosic suspension or after addition.