Diagnostically useful reagents formed by chemically combining a serologically determinant material to a polymeric carrier particle utilizing a water-soluble monocarbodiimide as a condensing agent as well as diagnostic methods utilizing the reagents are disclosed.

1,2,3,4,4a,10b-Hexahydro- and 1,2,3,4,4a,5,6,10b-octahydrophenanthridines, substituted in the 9-postion with hydroxy, lower alkoxy, hydroxy-substituted lower alkoxy or lower alkoxy-substituted lower alkoxy and whose 10b-carbon atom is quaternized with lower alkyl, lower cycloalkyl-alkyl or lower alkenyl, are described. The end products are useful as analgesic agents.

Three embodiments of an improved photo acoustic cell for use in analyzing solid and quasi-solid samples are disclosed. Each cell includes a sample holding chamber having one wall or portion of one wall thereof made from a light transparent material. The sample holding chamber in each embodiment is connected to a microphone by a thin tube which renders the cell, which includes the chamber tube and microphone, an acoustical resonant structure at a frequency within the response characteristics of t...

1,4-Benzodiazepin-2-ones are prepared via the reaction of a haloacetamidophenyl ketone with hexamethylenetetramine in the presence of ammonia. The 1,4-benzodiazepin-2-ones so prepared are known compounds useful as muscle relaxant and anti-convulsant agents.

The present invention relates to the preparation of the antibacterial substance L-2-amino-4-methoxy-trans-3-butenoic acid by culturing the organism Pseudomonas aeruginosa.

An optical apparatus and method for recognition of three-dimensional objects comprising an uneven illumination to project a striated pattern of illuminated and non-illuminated areas on the object which is scanned along a plurality of successive scan lines for generating video data which is compared with reference data for object recognition purposes.

The present invention relates to a device for transferring predetermined quantities of different liquid medium contained in separate containers which device comprises pump means for selectively withdrawing predetermined amounts of different liquid media from different containers and then transferring the withdrawn liquid media to the same receptacle.

An arrhythmia detection system for analyzing electrocardiographic signals comprising transforming a filtered, absolute, derivative of the electrocardiographic signals into a first integral signal defining an adaptive threshold level and depending from prior heart beat signals, transforming the electrocardiographic signals into a second integral signal representative of a heart beat virtually independent from prior heart beat signals, and comparing the levels of the first and second integral sign...

A patient care system for monitoring respiratory distress problems and providing therapeutic treatment comprising, a sensor for generating patient derived respiratory activity signals, detecting an apnea episode from the signals, and providing in response to a detected apnea episode, stimulation of the patient by a momentary inflation of a pneumatic means adapted for placement under the patient to raise the patient and induce loss of equilibrium for startling the patient into a natural respirati...

Apparatus for withdrawing minute quantities of a liquid medium into a liquid collecting apparatus. The so-obtained liquid medium is then transferred from the liquid collecting apparatus into a vessel containing another medium which interacts with the liquid medium collected to give information about the latter.