Abstract: A novel substrate for measuring plasmin which has chromophoric and fluoroescent properties against plasmin or a plasmin-like enzyme, which is characterized by being a compound of the formula or a salt thereof: ##STR1## wherein ##STR2## wherein ##STR3## .

Abstract: A novel substrate for measuring thrombin which has chromophoric and fluorescent properties on thrombin or a thrombin-like enzymes and is represented by a compound of the following general formula or a salt thereof: ##STR1##

Abstract: A glass fiber strand winding apparatus having a primary strand winding portion and a preliminary strand winding portion comprises a flanged portion the diameter of which is greater than that of the preliminary winding portion and at least one groove axially provided in the preliminary winding portion and the flanged portion from the inner end of the preliminary winding portion.

Abstract: Apparatus for reciprocating a yarn guide to wind yarn on a bobbin including a rotating scroll cam provided with an endless helical cam groove and a second cam groove in superposed relationship with the endless cam groove and having a greater lead angle than the endless cam groove over a predetermined distance adjacent each turning point. The yarn guide is provided with an elongate ship-shaped cam follower slidably fitted into the endless cam groove and pivotable with respect to the yarn guide and a cylindrical cam follower slidably fitted into the second cam groove. The width of the portion of the endless cam groove adjacent each turning point is gradually increased toward the turning point so as to permit the elongate cam follower to smoothly reverse its direction when it passes the turning point.

Abstract: An apparatus for winding a strand of glass fibers drawn from a bushing, having a rotatable turret and at least two winding collets mounted on the turret and adapted to be brought into a winding position one by one upon rotation of the turret. Each winding collet is provided at its free end with a waste strand winding portion having a frusto-conical strand guide surface coaxially extending with the collet and converged towards its free end, an annular strand stopping wall radially outwardly extending from the free end of the frusto-conical guide surface, at least one crescent-shaped wall surface extending radially inwardly from a portion of the outer periphery at the free end of the guide surface and formed thereon with a plurality of parallel grooves extending at a right angle to the diameter of the guide surface, and a crescent-shaped flat portion extending from a portion of the outer periphery of the stopping wall in confronting spaced relationship with the crescent-shaped wall surface.

Abstract: This invention provides a process for coating chopped strand of glass fiber with a thermosetting resin in an individually separated state which comprises dispersing chopped strand of glass fiber impregnated with a solution of thermosetting resin into an aqueous medium and then carrying out a removal of solvent. By this process, a pellet-formed glass fiber base material thickly coated with said thermosetting resin and free from filamentation and fuzzy of glass fiber can be obtained by a simple procedure.

Abstract: A fiber reinforced plastic molded article containing a porous resin concrete plate as a reinforcing material and a process for the production thereof are described. The porous resin concrete plate is made of 100 parts by weight of a thermosetting resin, 20 to 50 parts by weight of inorganic or organic hollow beads, and 50 to 100 parts by weight of an inorganic fine powder. The fiber reinforced molded article is produced by placing a glass fiber substrate in a mold, mounting a porous resin concrete late on the glass fiber substrate at an area to be reinforced, covering the porous resin concrete plate with a glass fiber substrate, impregnating the glass fiber substrates with a molding resin, and molding.

Abstract: In a glass fiber forming unit including a hollow-cylinder-shaped rotating spinner having (a) a bottom, (b) a surrounding wall with a number of molten glass projecting orifices, and (c) an upper annular flange extending inwardly from the upper edge of the surrounding wall; and an attenuating blast burner with jet flame orifices for attenuating primary filaments formed at the tips of transition cones of molten glass projecting from the rotating spinner into secondary filaments, the improvement comprising the jet flame orifices in the attenuating blast burner being so positioned that, for each jet flame from each jet flame orifice, only an outer cone of flame is in contact with the lower portion of the outer surface of the surrounding wall of the hollow-cylinder-shaped rotating spinner where the speed of the outer cone of flame is such as to not break the transition cone of molten glass, and a heating burner disposed inside the upper annular flange of the hollow-cylinder-shaped rotating spinner for jetting a fla

Abstract: An air nozzle apparatus for directing air flow against the undersurface of an orifice plate of a glass fiber drawing forehearth, having an air introducing section having a manifold formed with at least one air supply port, and an air nozzle section formed with a plurality of nozzle channels communicating with the manifold. The air nozzle section has a plurality of nozzle ribs of substantially the same shape each having opposed side surfaces and opposed end edge portions. The plurality of nozzle ribs are arranged to have their side surfaces located in adjacent relationship to provide a nozzle block. Each nozzle rib is formed on at least one of the opposed side surfaces with a longitudinally extending recess which defines one of the plurality of nozzle channels between the adjacent nozzle ribs.

Abstract: A traverse motion used in combination with a device for winding a continous elongate element such as a strand consisting of a large number of glass filaments drawn through a bushing with a large number of nozzles. In the traverse motion of the type including a scroll cam with an endless cam groove consisting of at least one pair of right- and left-hand grooves joined at each end and a strand guide which has a cam follower fitted in the endless cam groove of the scroll cam and is adapted to reciprocate along a straight path in parallel with the axis of the shaft of the scroll cam when the latter is rotated, the lead angle of the endless cam groove is increased adjacent to its ends or adjacent to each returning point of the cam follower so that the guide is increased in velocity adjacent to each returning point.

Abstract: An apparatus and method for manufacturing glass fibers are provided. The apparatus comprises means for containing a head of glass; an orifice plate having a large number of orifices arranged in flooding relationship, each of said orifices being provided on a projection or tip extending downwardly from said orifice plate; and means disposed below said orifice plate and being in communication with a gas supply for directing air upwardly to the undersurface of said orifice plate to cool the cones of glass formed at each projection or tip, said air impinging upon said orifice plate.

Abstract: The inorganic fiber of this invention comprising as major constituents______________________________________ % by weight ______________________________________ SiO.sub.2 40-50 CaO 0-10 MgO 15-25 Fe.sub.2 O.sub.3 + FeO 0-10 Al.sub.2 O.sub.3 5-15 MnO 2-15 ______________________________________(provided that the total amount of CaO, Fe.sub.2 O.sub.3, FeO and MnO is about 20% by weight) is excellent in alkali- and heat-resistances and is useful as a replacement of asbestos in asbestos-cement boards. Titanium oxide (TiO.sub.2) is contained in natural rocks or slags to be used for the meltable material as an impurity in the amount of about 2% by weight.

Abstract: Apparatus for applying a liquid to a cloth or the like including a stamp roll having a peripheral surface provided with a pattern of pits. A rubbing block, having at least one material supply passage extending vertically therethrough, is disposed above the stamp roll in such a way that a lower rubbing surface of the block is in sliding contact with the peripheral surface of the roll. A supply container is connected to the material supply passage of the rubbing block for supplying the liquid through the block to the peripheral surface of the stamp roll. A pressure roll is disposed below the stamp roll in abutting relation thereto to carry the cloth into intimate contact with the peripheral surface of the stamp roll.

Abstract: In drawing glass fiber from a glass melting furnace to form a multiplicity of filaments which are first divided and formed into a plurality of strands which are then wound on a single spindle to form a plurality of square-ended packages thereon, the strands are shifted to a front waste take-up portion of the spindle by means of a guide which is moved from the rear end to the front end of the spindle across the paths of movements of the strands when the packages are fully wound, to enable the fully wound spindle to be replaced by a new spindle without interrupting the drawing of glass fiber. The spacing between the spindle and the path of travel of the guide and the speed of travel of the guide are set at a low level and a high level respectively which are sufficient to ensure at least loose portions of the strands, which are produced when they drop into the groove between the adjacent packages, to be immediately wound on the peripheral surface of the adjacent package.

Abstract: Novel L-.gamma.-glutamyl-3-carboxy-4-hydroxyanilide of the formula, ##STR1## an acid addition salt thereof, or an alkali metal or amine salt thereof, which is useful for determining the activity of .gamma.-glutamyl transpeptidase.

Abstract: A cutting roller 2 of a glass filament chopping apparatus mounts a plurality of spaced, axially parallel cutting blades 19 held in receiving grooves 20 by retainer strips 21. The peripheral flange surfaces 24, 25 of the cutting roller on the opposite ends of the roller drum 18 are raised to almost the radius of the cutting blade edges, and serve as driving engagement surfaces when the rotating cutting roller is biased into contact with a feed roller 1.

Abstract: Novel L-.gamma.-glutamyl-3-carboxy-4-hydroxyanilide of the formula, ##STR1## an acid addition salt thereof, or an alkali metal or amine salt thereof, which is useful for determining the activity of .gamma.-glutamyl transpeptidase.

Abstract: An apparatus and method for use with a bushing assembly of the type wherein glass fibers are drawn through an orifice plate having a flat undersurface against which bulk gas is directed to effect cooling and fiber attentuation. A selectively adjustable bulk gas nozzle has a plurality of discharge conduits with valves therein which are adjustable and capable of being selectively operated to close the conduits or return the conduits to a preset open condition. The nozzle and/or a binder applicator are supported for select movement toward and away from the path of the fiber being drawn from the orifice plate. A detector senses the presence of fiber being drawn from the orifice plate and, in the event of fiber break-out, initiates a series of steps to warn the operator of the bushing assembly and, in the event the break-out condition is not corrected, shut down the drawing operation.

Abstract: A glass composition comprising 54-60% by weight of SiO.sub.2, 13-16% by weight of ZrO.sub.2, 12-15% by weight of Na.sub.2 O, 5.5-14% by weight of MnO and 0-7% by weight of CaO, in which MnO+CaO is 11% by weight or more and MnO.gtoreq.CaO, can produce alkali resistant glass fibers which can be used for reinforcing cement products.

Abstract: An apparatus and method for use with a bushing assembly of the type wherein glass fibers are drawn through an orifice plate having a flat undersurface against which bulk gas is directed to effect cooling and fiber attentuation. A selectively adjustable bulk gas nozzle has a plurality of discharge conduits with valves therein which are adjustable and capable of being selectively operated to close the conduits or return the conduits to a preset open condition. Mounting means supports the nozzle and/or a binder applicator for select movement toward and away from the path of fiber being drawn from the orifice plate. A detector senses the presence of fiber being drawn from the orifice plate and, in the event of fiber break-out, initiates a series of steps to warn the operator of the bushing assembly and, in the event the break-out condition is not corrected, shut down the drawing operation.