A carrier material is combined with Tc-99m and the resulting radiolabeled reagent is combined with a known ulcer-specific compound. The resultant agent, because of the ulcer-specific compound, tends to accumulate at the site of an ulcer in the digestive tract. The presence of localized concentrations of Tc-99m in the digestive tract indicates the existence and location of an ulcer. The Tc-99m is detected in the digestive tract by conventional radioimaging procedures.

An infrared detector includes a vacuum tube containing a photo sensitive layer comprised of densely packed needles arranged vertically on a substrate and having been grown as metal whiskers in a porous portion of the substrate. The substrate includes a metallic layer either in contact with or insulated from the needles depending upon the mode of the detecting system. The needles may face the incoming radiation, or may face away therefrom, in which case at least part of the substrate has to be tr...

A method and an apparatus for detecting a possible leak in a vacuum package, in which the vacuum package is received within a wrapping wall at least essentially consisting of a gas-tight, flexible wrapping foil adapted for substantial adjustment to the contours of the vacuum package under the influence of overpressure, so that the vacuum package is tightly enveloped by the wrapping wall. Overpressure is applied to the wrapping foil such that this adjustment to the contours of the vacuum package ...

Reticulocytes are stained with thioflavin T for detection in a flow cytometer.

A personal dust spectrometer for aerodynamically classifying and collecting sub-fractions of inspirable dust, has an entry which has an entry efficiency approximating that of the human head during inhalation, and a cascade impactor comprising a stack of stages each having a flat element and a peripheral wall and gas exit holes. A connector enables a gas sampling pump to be attached to draw air through the entry and through the cascade impactor. A filter is desirably used to collect the smallest ...

A railway detection system in which the presence of a train is detected by means of first inductive loop apparatus. When the train is detected second inductive loop apparatus is enabled to detect the passage of wheels of the train.

Reticulocytes are stained with thioflavin T or chrysaniline for detection in a flow cytometer.

A method and apparatus for detecting concentrations of nitrogen between 20% and 30% by weight such as is common in explosives is disclosed. A microtron having an output electron beam at a level below 45 MeV is targeted onto a typically tungsten target to provide gamma radiation levels. Deflection magnets adjacent to the target deflect the electron beam of the microtron to cause it to scan. Articles placed on a container containing suspect nitrogen are systematically scanned and output gamma radi...

Apparatus for determining displacement of an object comprises a light source (1) for propagating polychromatic light along a path to a detector (7). Radiation modulation means such as a filter (5) is provided in predetermined fixed location with respect to the source (1) and the path of the light is adjusted in response to a displacement of the object such as to vary the distributed spectral content of the light reaching the detector (7). The detector comprises first and second photoresponsive e...

The present invention relates to improvements in test methods for determining if eggs, seeds or the like are fertile. This is accomplished through the use of thermography equipment which senses a temperature rise characteristic of a fertile egg or seed. The sensing can be visually observed or a thermograph can be made of the observation.