Abstract: A gas sensing laser transceiver that may be used for sensing gas in explosive environments has a laser light source and electronic analysis equipment within an explosion proof chamber. The explosion proof chamber has an optical coupling allowing a laser output from the laser light source to exit the explosion proof chamber. The laser output travels along a path from the transceiver through a region in which a gas is to be detected and back to a photodetector. The photodetector may be intrinsically safe. A light concentrating optic located outside the explosion proof chamber, for example in a separate intrinsically safe chamber, may collect the incoming light and direct it to the photodetector.

Abstract: A gas sensing laser transceiver that may be used for sensing gas in explosive environments has a laser light source and electronic analysis equipment within an explosion proof chamber. The explosion proof chamber has an optical coupling allowing a laser output from the laser light source to exit the explosion proof chamber. The laser output travels along a path from the transceiver through a region in which a gas is to be detected and back to a photodetector. The photodetector may be intrinsically safe. A light concentrating optic located outside the explosion proof chamber, for example in a separate intrinsically safe chamber, may collect the incoming light and direct it to the photodetector.

Abstract: A whole-blood-based substitute composition that is useful in coagulation assays as a standard, reference, control, calibrator, linearity verifier, or training material is prepared by combining a red blood cell lysate that is free of plasma, leukocytes, and platelets with a platelet-free plasma of human origin and an antimicrobial agent.

Abstract: The present invention provides a cellular whole-blood D-dimer composition for use with diagnostic test procedures for D-dimer, and a method of its preparation. The composition comprises human erythrocytes and processed plasma to which D-dimer, and stabilizers, and optionally antimicrobial agents, are added and can be used as a standard and control for D-dimer testing.

Abstract: A whole-blood-based substitute composition that is useful in coagulation assays as a standard, reference, control, calibrator, linearity verifier, or training material is prepared by combining a red blood cell lysate that is free of plasma, leukocytes, and platelets with a platelet-free plasma of human origin and an antimicrobial agent.

Abstract: The present invention provides a cellular whole-blood D-dimer composition for use with diagnostic test procedures for D-dimer, and a method of its preparation. The composition comprises human erythrocytes and processed plasma to which D-dimer, and stabilizers, and optionally antimicrobial agents, are added and can be used as a standard and control for D-dimer testing.

Abstract: Stabilized compositions of natriuretic peptides comprise the peptide and an effective stabilizing amount of (i) an alkyl or aryl sulfonyl fluoride protease inhibitor, or (ii) benzamidine: