32results about How to "Minimize forming" patented technology

The invention provides a rapid, sensitive and specific nucleic acid detection system which utilizes isothermal nucleic acid amplification in combination with a lateral flow chromatographic device, or DNA dipstick, for DNA-hybridization detection. The system of the invention requires no complex instrumentation or electronic hardware, and provides a low cost nucleic acid detection system suitable for highly sensitive pathogen detection. Hybridization to single-stranded DNA amplification products using the system of the invention provides a sensitive and specific means by which assays can be multiplexed for the detection of multiple target sequences.

Vacuum carburizing of ferrous workpieces is performed at low pressure in a vacuum furnace using a carburizing hydrocarbon as the carburizing medium. The furnace is constructed to be generally transparent to the carburizing hydrocarbon so that cracking tends to occur at the workpiece which functions as a catalyst to minimize carbon deposits. The carburizing hydrocarbon is supplied in liquid form to an injector which injects the liquid carburizing hydrocarbon as a vapor to produce a uniform dispersion of the carburizing hydrocarbon about the workpiece, resulting in uniform carburizing of the workpieces.

A system and method that minimizes plaque accumulation on a stent and thereby restenosis that could require a subsequent invasive medical procedure following stent implantation. The stent, essentially an expandable wire mesh tube comprised of a plurality of integral lattice portions, configured for expansion within a blood vessel of a patient, is formed with an electrically-controlled, biocompatible device as one of its integral lattice portions. In a first implementation, the biocompatible device is under control of an externally-positioned controller which causes the device to emit an ultrasonic wave at a frequency corresponding to the mechanical resonance of the stent and thereby minimize accumulation of plaque. In a second or supplemental implementation, the device is or other portions of the stent are coated with a drug that can be controllably eluted by passing a current through the coating under control of the biocompatible device and the externally-positioned controller.

A multi-color LED illumination device and specifically a lens comprising a cylindrical opening extending into the lens from a light entry region at which one or more LEDs are configured. A concave spherical surface extends across the entirety of the light exit region of the lens, and a TIR outer surface shaped as a CPC extends between the light entry region and the light exit region. There are various diffusion surfaces placed on the sidewall surface of the cylindrical opening, as well as its upper planar surface and, depending on whether glare control is not needed, the exit surface of the lens. Lunes can also be configured on the sidewall surfaces of the cylindrical opening and if lessening glare is needed, also on the TIR outer reflective surface. The combination of lunes, diffusion elements, and the overall configuration of the lens provides improved color mixing and output brightness according to one embodiment. According to another embodiment, diffusion elements are manufactured and possibly increased on only select surfaces but not on the light exit region in order to lessen glare. Three light interactions in a first portion of light and two interactions in a second portion of light can improve color mixing and beam control. Those interactions includes two refractions either with an intermediate reflection or not, all of which are necessary to achieve the improved performance of the multi-color LED illumination device and lens hereof.

Vacuum carburizing of ferrous workpieces is performed at low pressure in a vacuum furnace using an unsaturated aromatic such as benzene as the carburizing medium. The unsaturated aromatic is gas phase hydrogenated into naphthenes, such as cyclohexane, which is metered into the furnace chamber proper and functions as the carburizing gas. The furnace is constructed to be generally transparent to the naphthenes so that cracking tends to occur at the workpiece which functions as a catalyst to minimize carbon deposits. The unsaturated aromatic is supplied in liquid form to fuel injectors which inject the liquid aromatic as a vapor at duty cycles and firing orders to produce a uniform dispersion of the hydrocarbon gas about the work resulting in uniform carburizing of the workpieces. An in-situ methane infrared sensor controls the process. Excess hydrogen beyond what is required to hydrogenate the aromatic is added to the furnace chamber to either assure full carbon potential and produce methane or to perform variable carburizing. Hydrogenation occurs in a hydrogenation coil in fluid communication with the furnace chamber with temperature for the reaction set by the position of the hydrogenation coil in the furnace insulation.

A synergistic composition and method is provided for controlling odor from waste products. The composition comprises a combination of magnesium hydroxide and a sulfide-consuming compound. The method includes adding a sufficient amount of the composition to a waste stream to provide sufficient sulfide-consuming compound to effect immediate removal of sulfide. The composition incorporates a pH elevating and buffering compound, which both increases and buffers the pH. The increased pH serves to reduce both the volatile sulfide species and the volatile fatty acid (VFAs) species. The elevated pH also promotes the growth of naturally occurring bacteria which metabolize the sulfide to an innocuous form. Finally, addition of the composition drives the pH into a range where the growth of sulfide producing bacteria is inhibited. The mixture has surprisingly been found to be synergistic with respect to both control of chemical species that produce odors and corrosion of metals commonly found in sludge dewatering equipment.

The invention relates to a process for preparing an Al / TiC nanocomposite material comprising an aluminum matrix in which particles comprising nano-sized TiC are dispersed. It comprises:a) preparing a first powder mixture by contacting a graphite powder with a titanium aluminide powder of the formula Al3Ti, both powders having micro- or higher sized particles;b) preparing a second powder mixture by mechanosynthesis of the first powder mixture, the second powder mixture being formed in all or part by particles comprising both titanium aluminide and graphite;c) compressing the second powder mixture to obtain one or more greens;d) reactively sintering the green(s), thereby the Al / TiC nanocomposite material is obtained.