Laminated test devices in which positive results are detected by the appearance of a symbol on the surface of the device due to a color change in an indicator in the device are improved by placing the indicator lamina on one side of a light-transmissive substrate sheet and a pigment lamina on the other side, the indicator lamina forming the icon and the pigment lamina forming the background, the pigment being the color of the indicator prior to the color change. This arrangement reduces false po...

An exhaust system for a liquid processing vessel or tank including a port provided in a cover of the tank and a closure fixed in the tank to close the port when the cover in a closed position closing the space enclosed by the tank. The cover is movable to an open position and fumes or vapors from the liquid in the tank are removed through the port and a conduit communicating with the port and an exhaust passage in which suction is produced to remove the vapors. When the cover is moved to its clo...

Stationary swimming exercises are conducted with a lightweight, compact and portable apparatus which includes a manually collapsible bag formed of flexible sheet material for containing a volume of water, and a tether line which has a rear portion connected to the bag and a forward portion which is connectable to a swimmer. To facilitate filling and draining, the bag has an elongated opening provided with an elongated closing member. According to the method, the bag is filled with pool water by ...

A method of removing hydrocarbon contaminants from a source stream, which is particularly applicable to removing volatile hydrocarbon contamination (such as from spilled gasoline) from an underground site. The source stream, which may be extracted from an underground site, is typically mixed with an oxygen containing second stream (preferably air) and the resulting mixed stream passed through a catalytic converter. One or more parameters are monitored which provide an indication of oxidation eff...

An air filter apparatus, in particular for a heating and/or air conditioning installation for a motor vehicle, is of the kind comprising a housing through which an air stream can pass, with at least one filter member pivotally mounted within the housing for movement between a working position and retracted position. The filter member comprises a first end which is pivotally mounted about a first axis extending at right angles to the direction of flow of the air stream, and a second end disposed ...

A test support for support-bound tests for the determination of components of fluids, especially of human and animal body fluids. The test support is composed of a plurality of layers, and the joining of the layers is accomplished at least partially by sewing.

An exhaust gas system for an internal combustion engine includes a first exhaust treatment unit with a first back pressure and a second exhaust treatment unit with a second back pressure being higher than the first back pressure. The system advantageously enables the configuration of systems having two exhaust treatment units that are disposed one behind the other in flow direction. The first and/or second exhaust treatment unit can have a smaller construction due to the homogenization of flow. ...

Fluid analyzer systems are provided which can detect a multitude of fluids in a sample to a very high level of accuracy which includes the detection of the presence of very small amounts of fluids. The results are both qualitative and quantitative. The systems consist of a receptacle which is filled with the fluid sample to be analysed which is placed into a consistent light condition environment where its temperature is measured. Under a predetermined time duration, Charge-Coupled Device (CCD) ...

The invention relates to a chemical sensor comprising a sensor film formed of a nanoparticle network in which the nanoparticles are interlinked by functionalized dendrimer molecules. The dendrimers support an efficient uptake of analyte molecules by the film material and therefore enable a high sensitivity of the sensor. In addition, the chemical nature of the dendrimers strongly determines the chemical selectivity of the sensor device. By cross-linking the components of the sensitive material t...

Assay device structures for a device where fluid flows from a one region to another. The device structures comprising one or more capillarity-inducing structures; where the capillarity-inducing structure induces capillary force along an axis that is essentially perpendicular to the axis along which capillary force induced in another region of the device.