Abstract: An apparatus with which to perform numerous exercises including two elongated frame members which are hingably attached to a horizontal strut that may be fastened to a ceiling such as in a garage. Various items may be detachably secured to the frame when it is supported on the floor, including a squat rack that supports a barbell preparatory to its use in performing squats, a chinning bar, a tricep support for performing curls, a leg machine for performing leg extensions and leg curls, a cable and pulley arrangement for performing pulldowns, a bench for performing bench presses, etc. The frame is hinged to a strut that is fastened to the ceiling so that when it is desired to fold the apparatus away after the workout, it may be lifted on its hinges up to the ceiling where it is hooked until the next workout.

Abstract: Water soluble xanthylium derivative substrates of rhodamine 110 and rhodol permit spectrophotometric and fluorescent measurements of trypsin-like enzymes without the addition of organic solvent additives and/or special water solubilizing agents. These novel substrates exhibit increased sensitivity for determining low levels of activity of trypsin-like enzymes such as proteolytic enzymes, cofactors, activators, antiactivators, and inhibitors. These substrates can be substituted for fibrinogen to monitor the pathways of blood coagulation.

Abstract: Water soluble xanthylium derivative substrates of rhodamine 110 and rhodol permit spectrophotometric and fluorescent measurements of trypsin-like enzymes without the addition of organic solvent additives and/or special water solubilizing agents. These novel substrates exhibit increased sensitivity for determining low levels of activity of trypsin-like enzymes such as proteolytic enzymes, cofactors, activators, antiactivators, and inhibitors. These substrates can be substituted for fibrinogen or monitor the pathways of blood coagulation.

Abstract: Fluorogenic substrates for proteolytic enzymes having the formula: ##STR1## or acid salts thereof wherein: R.sub.1 is hydrogen-L, hydrogen-D, benzoyl, benzenesulfonyl, glutaryl, pyroglutamyl, carbobenzoxy, D-serine, or carbobenzoxy-serine;R.sub.2 is hydrogen, phenyl, a straight, branched or cyclic alkyl having 1 to 4 carbons, or propionic acid;R.sub.3 is hydrogen, straight or branched or cyclic alkyl having 1 to 4 carbons, 4-aminobutane, or 3-guanidylpropane;R.sub.4 is methyl, 4-aminobutane, or 3-guanidylpropane;R.sub.5 is a fluorogenic moiety, severable from said compound by a proteolytic enzyme and having different fluorescent property when severed from said compound than when forming part of said compound.The enzymes, when reacting with the substrate, remove the fluorogenic group R.sub.5 producing an increase in its fluorescence. The increase of the fluorescence is an indication of the activity of the enzyme present. Specific enzymes thusly detectable include plasmin, thrombin, the factors X.sub.a, XI.sub.

Abstract: Fluorogenic substrates for proteolytic enzymes having the formula: ##STR1## or acid salts thereof wherein: R.sub.1 is hydrogen-L, hydrogen-D, benzoyl, benzenesulfonyl, glutaryl, pyroglutamyl, carbobenzoxy, D-serine, or carbobenzoxy-serine;R.sub.2 is hydrogen, phenyl, a straight, branched or cyclic alkyl having 1 to 4 carbons, or propionic acid;R.sub.3 is hydrogen, straight or branched or cyclic alkyl having 1 to 4 carbons, 4-aminobutane, or 3-guanidylpropane;R.sub.4 is methyl, 4-aminobutane, or 3-guanidylpropane;R.sub.5 is a fluorogenic moiety, severable from said compound by a proteolytic enzyme and having different fluorescent property when severed from said compound than when forming part of said compound.The enzymes, when reacting with the substrate, remove the fluorogenic group R.sub.5 producing an increase in its fluorescence. The increase of the fluorescence is an indication of the activity of the enzyme present. Specific enzymes thusly detectable include plasmin, thrombin, the factors X.sub.a, XI.sub.