Abstract:
A calibration gas generation method and apparatus for generating a selectively humidified calibration gas to a measurement probe includes a delivery conduit having a conduit inlet adapted to receive a carrier gas stream and a conduit outlet for delivering a calibration gas stream. The apparatus is provided with a first injection unit having a first intake in fluid communication with a first reservoir and a first outlet in fluid communication with the delivery conduit, the first reservoir being adapted to hold a first analyte in liquid form, and a second injection unit having a second intake in fluid communication with a second reservoir and a second outlet in fluid communication with the delivery conduit, the second reservoir being adapted to hold a humidificant in liquid form. The apparatus further includes at least one vaporizer downstream of the first and second outlets and upstream of the conduit outlet for converting the analyte and humidificant liquids to vapor form and delivering a calibration gas including the carrier gas, analyte vapor, and humidificant vapor to the conduit outlet.
Abstract:
A method of using an exhaust flow simulation system to test the effects of exhaust system conditions on various materials. A typical exhaust flow simulator is a burner-based system, in which exhaust from burner combustion is exhausted through an exhaust line. A "test coupon" of the material may be placed at an appropriate location in the flow line, and tested to determine how it is affected by the exhaust resulting from various fuels and additives.
Abstract:
Disclosed are hazardous chemical simulant compositions that can be used to simulate hazardous chemicals and methods for using hazardous chemical simulants. The compositions can include a phosphor, which emits visible light in the presence of ultraviolet light. The methods of using hazardous chemical simulants includes exposing a hazardous chemical simulant to special lighting conditions so that its location can be easily detected.
Abstract:
The present invention relates to a pozzolanic admixture containing ammonia-laden fly ash, method for making the pozzolanic admixture and method for controlling ammonia gas (NH3) emission from cementitious slurries using the pozzolanic admixture. The associated hypochlorite and ammonia reaction produces monochloramine and chloride salts at relatively low concentration levels harmless to concrete and concrete applications. The resulting monochloramine and chloride salt products are stable and do not dissipate into the air, thereby, eliminating odorous emission that is produced from cementitious slurry containing untreated ammonia laden fly ash. This invention relates to the method of adding hypochlorites (OCl ) in the form of calcium hypochlorite - Ca(OCl)2, lithium hypochlorite-LiOCl, sodium hypochlorite NaOCl or trichloro-s-triazinetrione - C3N3O3Cl3 to the ammonia-laden fly ash at dosage levels, based on ammonia concentration in ash and stoichiometry, for a complete or partial oxidation of ammonia to eliminate, or respectively reduce, ammonia gas evolution from the high pH cementitious slurries.
Abstract:
A method of storing an oxygen transfusion composed of a lipid molecule aggregates dispersed in an aqueous medium and an aqueous dispersion containing heme or a heme derivative contained in the lipid molecule aggregates, characterized by comprising: eliminating oxygen from the above-described aqueous dispersion to thereby convert the above heme or its derivative into the deoxy form; and storing the aqueous dispersion, from which oxygen has been thus eliminated, in an inert gas atmosphere.
Abstract:
A method and system are provided for creating a mercury halide standard, and for using that standard to test a mercury analyzer system. Gaseous elemental mercury of a known concentration from a gas cylinder and a halogen donor are fed to a reaction chamber where they react to form mercury halide. The mercury halide is fed to a mercury analyzer system where it is converted to reform gaseous elemental mercury which is then measured by a mercury analyzer. By comparing either the amount of elemental mercury supplied to the reaction chamber or the amount of mercury halide formed in the reaction chamber with the amount of elemental mercury converted from the mercury halide, the ability of the mercury analyzer system to convert mercury halide to gaseous elemental mercury can be evaluated.
Abstract:
Methods of passivating a metal surface are described, the methods comprising the step of i exposing the metal surface ti a silicon-containing passivation material ii evacuating the metal surface, iii exposing the treated surface to a gas composition having a concentration of reactive gas that is greater than an intended reactive gas concentration of gas to be transported by the metal surface iv evacuating the metal surface to remove substantially all of the gas composition to enable maintenance of an increased shelf-life, low concentration reactive gas at an intended concentration and v exposing the metal surface to the reactive gas at the intended reactive gas concentration. Manufactured products, high stability fluids, and methods of making same are also described.
Abstract:
This invention provides methods and apparatus that enable consumers to experience, prior to purchase, the aroma of a finished product even though the product as sold is unfinished. Further, methods and apparatus provide users of a product with a reference aroma that may be employed to determine if the product is suitable for use, while, prior to purchase, consumers can experience a selected aroma of a consumer product that has a plurality of aromas, and the aroma bouquet of a consumer product where a particular aroma in the bouquet has been intensified. Among other advantages, this invention enables marketers to employ additional sensual modalities, and particularly the sense of smell, in offering products for sale, and thus permits consumers to make better informed purchasing decisions. A preferred embodiment of a method of the invention includes the steps of characterizing an aroma of a finished state of a consumer product; synthesizing the aroma, responsive to the characterization; and associating the synthesized aroma with the consumer product.
Abstract:
Multi-analyte reference solutions with stable partial pressure of oxygen (pO2) in zero headspace packaging, wherein said solutions have long shelf and use lives at room temperature, are disclosed, as are methods for preparing such solutions. Source materials for the components of those reference solutions are screened and selected for low or no oxygen reactivity. The reference solutions are packaged in containers lined with a material having low or no oxygen reactivity. Those containers are laminated, preferably including polypropylene as an inner layer, aluminum foil as a middle layer, and an outer layer that protects the aluminum layer from physical damage. An access device attached to the inside wall of the container and preferred tubing for conducting a reference solution from the container into a blood analyser are also disclosed. Further described are stable quality control reagents constituting as few formulations as practicable to test for from about 5 to about 20 analytes wherein each formulation is in a zero headspace container.
Abstract:
A method is disclosed for reliably calibrating a sensor used in diagnostic sensing of a predetermined parameter, e.g., CO2 partial pressure, O2 partial pressure, or pH, of a solution such as blood, the method compensating for expected variations over time in the value of the parameter in a calibration solution. The parameter of the calibration solution has a predetermined initial value, and the solution is initially located within a container that is configured to allow the value of that parameter to vary over time in a predetermined manner. Supplying the calibration solution to the sensor causes the sensor to produce a calibration solution signal, which is compared with a calculated value for the parameter based on its expected variation over time, to produce a calibration factor. Thereafter supplying the test fluid to the sensor causes the sensor to produce a test fluid signal, and this test fluid signals then is adjusted in accordance with the calibration factor.