Abstract: This syringe for dispensing multiple doses of a liquid medicament one at a time has a cylindrical barrel for containing the medicament. At one end of the barrel is a single outlet opening. A plunger in the barrel discharges the medicament. A syringe cap rotatable mounted on the barrel has guide means restraining the cap against axial movement. Ratchet means on the cap and barrel permit only unidirectional rotation of the cap and sequentially retain the cap in equally spaced detent positions on the barrel. Nozzles on top of the cap have passages for ejecting the medicament. Each passage terminates in a hole in the top of the cap. Only one nozzle at a time communicates with the barrel vis the outlet opening in each detent position of the cap on the barrel.

Abstract: This invention concerns apparatus and a method for preparing an embryo for cryogenic storage, and for thawing thereof prior to implantation. The apparatus employs a washing tube containing a microporous filter dividing the tube into two chambers between opposite open ends. A tubular coupling member is attachable to either end of the tube. A liquid driving device which may be an aspirator, drives holding, washing, and storing liquid through the tube while the filter retains the embryo in a washing chamber. A storage straw can be attached to the coupling member to receive by aspiration the storing liquid containing the embryo. The straw contains a movable plug or wick at one end to force the storing liquid and embryo out of the storage straw into the washing chamber, after the storing liquid is thawed.

Abstract: A hermetically sealed, nonrotatable closure for a bottle having a cylindrical body containing liquid and having an integral tubular neck formed with a free open end, comprises an annular flange on the tubular neck. A flexible stopper mounts on the flange. A cup shaped cap has a flat top wall with peripherally integral pliable skirt in which is an internal beveled ridge. The ridge engages the flange to lock the cap on the neck of the bottle. The top wall of the cap has a central hole to expose the stopper which can be pierced by a hypodermic needle to extract the liquid from the bottle while the cap remains unbroken on the neck of the bottle. Inside the skirt of the cap are circumferentially spaced teeth which engage in circumferential slots in the annular flange to cooperate with the ridge in preventing axial movement on the cap and stopper on the bottle.

Abstract: An arrangement for interconnecting and supporting a pair of hexagonal building structures includes a pair of common support columns each having a hexagonal shaped connector tube mounted to an upper end thereof. Each connector tube includes apertures in each of the six lateral walls thereof which are adapted for receiving a nut and bolt combination for coupling the tube to the eave beams and roof trusses of two hexagonal building structures. The nut and bolt combinations are hidden from view within the connector tube and adjacent beams to provide a clean, attractive appearance and are not exposed to the elements. The use of common support columns and a common eave beam for adjacent hexagonal building structures simplifies assembly, reduces the number of structural components and building cost, and integrates two or more of such building structure for increased structural strength.

Abstract: A system for embryo retrieval from a uterine cavity may employ apparatus comprising a container of liquid medium, a syringe and a filter interconnected by a plurality of valved conduits connected in a closed loop to circulate the liquid medium into and out of the container, syringe, filter and cavity cyclically. The circulation cycle can be repeated many times with a minimum amount of liquid medium to collect a maximum number of embryos in the filter.

Abstract: A method of preparing a solid water absorbing resin including mixing a monomer solution of (A) acrylic acid neutralized 70-100 mole percent; and (B) a water-miscible to water-soluble polyvinyl monomer in a combined concentration of at least 30 wt. %; with water to form a mixed monomer solution, and adding a thermal initiator and a redox initiator to the mixed monomer solution to form an initiated mixed monomer solution, and wherein the mixed monomer solution is at a temperature below the decomposition temperature of the thermal initiator when the thermal initiator is added to the mixed monomer solution and wherein the temperature of the mixed monomer solution is high enough such that addition of the redox initiator thereto causes sufficient polymerization of the monomers to raise the temperature of the initiated mixed monomer solution to a level sufficient that the thermal initiator decomposes sufficiently to provide, together with the redox initiator, substantially complete polymerization.

Abstract: This cannula assembly for injecting medicinal fluid into an animal's teat has a first tapered cannula formed with a circumferential bead at its wider end. A flexible jacket encloses the cannula and has another bead detachably engaging the bead on the cannula. A tapered second cannula extends forwardly from the jacket. This cannula is shorter than the first cannula. A flexible cap has an internal bead which detachably engages a corresponding bead at the sider end of the second cannula. This assembly provides the user with a choice of cannulas of two different sizes in treating a teat. In another form of the invention, a second flexible jacket has a bead which detachably engages a bead on the second cannula. A third cannula extends forwardly from the second jacket. The flexible cap detachably engages a bead on the third cannula, so that the user has a choice of cannulas of three different lengths in treating a teat.

Abstract: Improved water-absorbing, crosslinked acrylate resins are prepared by aqueous polymerization of (A) acrylic acid neutralized 70 to 100 mole percent for example with ammonia and/or caustic alkali and/or an amine; with (B) acrylamide in a mole ratio of 70 to 100 mole percent (A) to 30:0 mole percent (B); (C) styrene, in an amount of 0% to 25% based on the weight of acrylic acid or acrylate; and (D) a water miscible or a water soluble polyvinyl monomer in the presence of (E) a metal oxide, such as titanium dioxide, in an amount of 0.001% to 5% based on the total weight of (A), (B), (C), (D) and (E), such that the amount of (D) is 0.001 to 0.6 weight percent based on the total weight of (A), (B), (C), (D) and (E). In addition, surface treating the water-absorbing crosslinked acrylate resins with a polyquaternary amine substantially further increases both the rate of water absorption and the quantity of water absorbed and retained by the metal oxide-containing resin.

Abstract: Surface treating water-absorbent resins with a polyquaternary amine substantially increases both the rate of water absorption and the quantity of water absorbed and retained by the resin. In addition to improved water absorbing properties, the surface-treated resins maintain the necessary "dry feel" required for most applications.

Abstract: Improved water-absorbing, crosslinked acrylate resins are prepared by aqueous polymerization of (A) acrylic acid neutralized 70 to 100 mole percent for example with ammonia and/or caustic alkali and/or an amine; with (B) acrylamide in a mole ratio of 70 to 100 mole percent (A) to 30:0 mole percent (B); and (C) a water miscible or a water soluble polyvinyl monomer in the presence of (D) a styrene-maleic anhydride copolymer, neutralized 70 to 100 mole percent for example with ammonia, and/or caustic alkali and/or an amine, in an amount of 1% to 25% based on the weight of acrylic acid or acrylate, such that the amount of (C) is 0.001 to 0.6 weight percent based on the total weight of (A), (B), (C) and (D). In addition, surface treating the water-absorbing crosslinked acrylate resins with a polyquaternary amine substantially further increases both the rate of water absorption and the quantity of water absorbed and retained by the resin.

Abstract: Surface treating water-absorbent resins with a polyquaternary amine substantially increases both the rate of water absorption and the quantity of water absorbed and retained by the resin. In addition to improved water absorbing properties, the surface-treated resins maintain the necessary "dry feel" required for most applications.

Abstract: Water absorbing, cross-linked acrylate resin copolymers are prepared by aqueous polymerization of (A) acrylic acid neutralized 70 to 100 mole percent for example with ammonia, and/or caustic alkali and/or an amine; with (B) styrene and/or methyl methacrylate in an amount of 1% to 25% based on the weight of acrylic acid or acrylate, and (C) acrylamide in a mole ratio of 70 to 100 mole percent (A) to 30:0 mole percent (C); and (D) a water miscible or a water soluble polyvinyl monomer in an amount of 0.001 to 0.3 weight percent based on the total weight of (A), (B), (C) and (D).

Abstract: A method is disclosed for fixing certain dangerous substances into recyclable waste foundry sand so that they are less likely to leach out into the environment. The method uses a roasting process which causes the dangerous substances to form insoluble compounds with the sand. One example is shown where hazardous waste foundry sand which contains acetic acid soluble lead contamination is treated by this method. In this example the lead is believed to react with the sand during the roasting process forming compounds such as lead silicate which are insoluble to acetic acid. The amount of lead which may be leached out into the environment is reduced to a safe level according to the currently accepted test methods promulgated by the U.S. Environmental Protection Agency. The method may be applied to the conversion of waste foundry sand into reusable sand or landfill which are less likely to leach dangerous substances into the environment.