Abstract: A colloid comprising a plurality of nanocrystals, each nanocrystal comprising rubidium, a group 11 element of the Periodic Table of Elements such as copper, silver or gold, and a halogen. A method for preparing said colloid via a room temperature ligand assisted re-precipitation (LAPP) method, wherein the ligand is an acidic ligand such as oleic acid. The precursor solution is formed in a polar organic solvent such as DMSO or DMF, and the precursor solution is contacted with a non-polar organic solvent and said ligand to precipitate the nanocrystals. A polymer comprising a plurality of nanocrystals, each nanocrystal having a particle size in the range of 1 nm to 50 nm; and a use of said colloid in optoelectronic devices, etc. are also disclosed.

Abstract: Speaker systems are provided, particularly for mounting in off-road vehicles, ATVs, UTVs, watercraft and motorcycles. The speaker systems may include a linear array of speakers and a housing encasing a backside thereof. In some cases, the speaker systems include a pipe-mounting clamp coupled to the housing for mounting the speaker system to a surface. In addition or alternatively, the speaker systems may include L-shaped mounting brackets arranged along opposing lateral sides of the housing for mounting the speaker system to a surface. In some cases, the housing includes a substantially uniform depth spanning opposing lateral sides of the linear array of speakers. In some embodiments, a speaker system may be suspended in proximity to an upper bar of a windshield frame, front roll bar, and/or front edge of a roof of a vehicle.

Abstract: The present invention provides the use of a metal-doped hydroxyapatite catalyst for highly selective conversion of an alcohol to an aldehyde at low temperatures. More specifically, the invention provides the use of a silver-doped hydroxyapatite catalyst for the highly selective oxidative dehydrogenation of ethanol to acetaldehyde. The present invention also provides the method for converting ethanol to acetaldehyde using a silver-doped hydroxyapatite catalyst.

Abstract: Speaker systems are provided, particularly for mounting in off-road vehicles, ATVs, UTVs, watercraft and motorcycles. The speaker systems may include a linear array of speakers and a housing encasing a backside thereof. In some cases, the speaker systems include a pipe-mounting clamp coupled to the housing for mounting the speaker system to a surface. In addition or alternatively, the speaker systems may include L-shaped mounting brackets arranged along opposing lateral sides of the housing for mounting the speaker system to a surface. In some cases, the housing includes a substantially uniform depth spanning opposing lateral sides of the linear array of speakers. In some embodiments, a speaker system may be suspended in proximity to an upper bar of a windshield frame, front roll bar, and/or front edge of a roof of a vehicle.

Abstract: Speaker systems are provided, particularly for mounting in off-road vehicles, ATVs, UTVs, watercraft and motorcycles. The speaker systems include a linear array of speakers and a housing encasing a backside thereof. In some cases, the speaker systems may include mounting brackets arranged along opposing lateral sides of the housing. Each of mounting brackets may include a hub secured to the housing, a bracket rotationally coupled to the hub, and a locking mechanism for securing positions of the bracket and the hub relative to each other. In addition or alternatively, a speaker system may include a pipe-mounting clamp comprising a lower part removably coupled to the housing and an upper part removably coupled to the lower part.

Abstract: Speaker systems are provided, particularly for mounting in off-road vehicles, ATVs, UTVs, watercraft and motorcycles. The speaker systems may include a linear array of speakers and a housing encasing a backside thereof. In some cases, the housing includes sliding track mounts along its top and bottom surfaces. In addition or alternatively, the speaker systems may include nut and bolt fasteners arranged on top of the housing and/or mounting brackets arranged along opposing lateral sides of the housing. In some embodiments, a speaker system may be suspended in proximity to an upper bar of a windshield frame, front roll bar, and/or front edge of a roof of a vehicle and adjustable mounting brackets may be used to direct the speakers toward the driver and passenger seats of the vehicle. In some cases, a speaker system may be operationally independent from a stereo of a vehicle in which it is mounted.

Abstract: The present invention provides the use of a metal-doped hydroxyapatite catalyst for highly selective conversion of an alcohol to an aldehyde at low temperatures. More specifically, the invention provides the use of a silver-doped hydroxyapatite catalyst for the highly selective oxidative dehydrogenation of ethanol to acetaldehyde. The present invention also provides the method for converting ethanol to acetaldehyde using a silver-doped hydroxyapatite catalyst.

Abstract: Loudspeaker clamps and assemblies are disclosed which include base and mounting clamps having respectively engageable electrical connectors, wherein the electrical connectors include distinct electrical contacts for audio signal transmission, ground connection, and optionally light signal transmission. In some cases, the structure of the base clamp may be rotatable relative to the structure of the mounting clamp when the electrical connectors are engaged. In some embodiments, the base and mounting clamps may each include an annular structure surrounding their respective electrical connectors, wherein one of the annular structures is nestable within the other encircling structure and the nestable structure includes an outer circumferential groove.

Abstract: Methods for waste treatment and compositions of stabilized waste elements are provided, typically for the disposal of arsenical wastes. Arsenic trioxide waste produced as a by-product of metal extraction is slurried in water for from 6 to 24 hours with finely divided quicklime to produce nonvolatile calcium arsenate (III). An excess of CaO stoichiometry with As is used to consume secondary waste species such as sulphate, silicate and iron oxides. The precipitated arsenate is oven dried at 120.degree. C. and then calcined in air between 15 minutes to several hours at 1000.degree. C. to 500.degree. C. respectively to oxidize arsenate (III) to arsenate (V) as Ca.sub.5 (AsO.sub.4).sub.3 (OH) (an apatite) as the major arsenic immobilization phase, with minor arsenic incorporated in Ca.sub.3 (AsO.sub.4).sub.2. Calcium sulphate anhydrate (sulphate immobilization) and calcium iron oxide (iron immobilization) are also produced.