Abstract: A test composition and device are disclosed for determining the presence of peroxidatively active substances, such as hemoglobin, in a test sample. Also disclosed is a one-dip method for preparing the device.The test composition comprises:An organic hydroperoxide,An indicator capable of producing a detectable response in the presence of a hydroperoxide and a peroxidatively active substance, andA borate ester having the structure ##STR1## in which m, n and p, same or different, are integers of 1 to about 4. The test device comprises a carrier matrix incorporated with the test composition.

Abstract: A test composition is disclosed which is useful in determining the presence of a peroxidatively active substance, such as hemoglobin, in a test sample. The composition comprises an organic hydroperoxide, an indicator capable of producing a detectable response in the presence of a peroxide, and a diluent having the structure ##STR1## IN WHICH R.sub.1 and R.sub.2, same or different, are hydrogen, alkyl or alkoxy having 1 to about 6 carbon atoms, or aryl. The method comprises preparing the test composition and incorporating it with a carrier matrix.

Abstract: A test composition, device, and method for determining the presence of a peroxidatively active substance in a sample are disclosed. The composition comprisesA. an organic hydroperoxide,B. an indicator capable of producing a detectable response in the presence of a hydroperoxide and a peroxidatively active substance,C. a diluent compound having the structure ##STR1## or mixtures thereof, in which R.sub.1 and R.sub.2, same or different, are hydrogen, alkyl or alkoxy having 1 to about 6 carbon atoms, or aryl, andD. a borate ester having the structure ##STR2## in which m, n and p, same or different, are integers of 1 to about 4. The device comprises a carrier matrix incorporated with the composition, and the method comprises contacting a sample, suspected of containing a peroxidatively active substance, with said composition.

Abstract: A magnetic bubble detector comprising a planar layer of magnetic material in which magnetic bubble domains can be moved and a thin planar film on one surface of that layer. The layer has a magnetization perpendicular to the plane of the layer while the film has a magnetization in the plane thereof. The planar layer and film comprise an optical waveguide for propagation of linearly polarized light therethrough along a first axis. Linearly polarized light is coupled into the guide. A bubble expander stretches bubble domains in a direction transverse to their direction of movement as they are moved in the layer of magnetic material past the light guide on a second axis transverse the first axis.

Abstract: Improved test compositions, devices and methods are provided for detecting peroxidatively active substances in body fluids, excreta and the like. In the type of test compositions including an indicator capable of being oxidized in the presence of a peroxidatively active substance to provide a color change, an oxidizing agent effective to oxidize said indicator, and a potentiating agent, the improvement comprises the use as said potentiating agent of an acid salt or adduct of a compound selected from the class of compounds of the general formula ##SPC1##Wherein R.sub.1 is hydrogen, lower alkyl, hydroxy or thiophenyl; R.sub.2 is hydrogen or lower alkyl; R.sub.3 is hydrogen or lower alkyl; R.sub.4 is hydrogen, carboxy, lower alkyl or lower alkoxy; and R.sub.5 is hydrogen or lower alkyl.