Abstract: A fluoride monitoring electrode comprises a single crystal of a lanthanum series fluoride doped with alkaline earth ions. The sample pre-treatment solution used in conjunction with the electrode includes a buffer that maintains a pH of 5 to 8 and a complexing agent that complexes iron and aluminum.

Abstract: An elongate container structure that is coaxially aligned includes a lipstick tube structure arranged to direct the lipstick tube from within the container at a first end of a central hub, with a second end of the central hub having a removable storage container arranged to contain medicament, coins, or the like therein.

Abstract: A form of calcium carbonate having a blocky rhombohedral crystal structure and properties including a surface area of from about 3 to about 15 m.sup.2 g, an average discrete particle size of from about 0.2 to about 0.9 micron, wherein the discrete particles have an aspect ratio less than about, 2:1 and a particle size distribution such that at least about 60 weight percent of the particles have a size within 50 percent of the equivalent discrete particle spherical diameter, suitable for use as a filler material in papermaking to improve the optical properties of the resulting paper, is disclosed. An accelerated heat-aging process, including embodiments thereof which utilize hydrothermal techniques, for rapidly producing this form of calcium carbonate, and a related form of calcium carbonate having a hexagonal prismatic crystal structure and the same properties, in large quantities to meet the demand of the papermaking industry, as well as a method for using these materials in papermaking, are also disclosed.

Abstract: A form of calcium carbonate having a blocky[-six-sided] rhombohedral crystal [habit ] structure and [a morphology, with] properties including a surface area of from about 3 to about 15 m.sup.2 /g, an average discrete particle size of from about 0.2 to about 0.9 micron, wherein the discrete particles have an aspect ratio less than 2, and a particle size distribution such that at least about 60 weight percent of the particles have a size within 50 percent of the equivalent discrete particle spherical diameter, suitable for use as a filler material in papermaking to improve the optical properties of the resulting paper, is disclosed.

Abstract: A form of calcium carbonate having a blocky rhombohedral crystal structure and properties including a surface area of from about 3 to about 15 m.sup.2 /g, an average discrete particle size of from about 0.2 to about 0.9 micron, wherein the discrete particles have an aspect ratio less than about 2:1, and a particle size distribution such that at least about 60 weight percent of the particles have a size within 50 percent of the equivalent discrete particle spherical diameter, suitable for use as a filler material in papermaking to improve the optical properties of the resulting paper, is disclosed. An accelerated heat-aging process, including embodiments thereof which utilize hydrothermal techniques, for rapidly producing this form of calcium carbonate, and a related form of calcium carbonate having a hexagonal prismatic crystal structure and the same properties, in large quantities to meet the demand of the papermaking industry, as well as a method for using these materials in papermaking, are also disclosed.

Abstract: A form of calcium carbonate having a blocky rhombohedral crystal structure and properties including a surface area of from about 3 to about 15 m.sup.2 /g, an average discrete particle size of from about 0.2 to about 0.9 micron, wherein the discrete particles have an aspect ratio less than about 2:1, and a particle size distribution such that at least about 60 weight percent of the particles have a size within 50 percent of the equivalent discrete particle spherical diameter, suitable for use as a filler material in papermaking to improve the optical properties of the resulting paper, is disclosed. An accelerated heat-aging process, including embodiments thereof which utilize hydrothermal techniques, for rapidly producing this form of calcium carbonate, and a related form of calcium carbonate having a hexagonal prismatic crystal structure and the same properties, in large quantities to meet the demand of the papermaking industry, as well as a method for using these materials in papermaking, are also disclosed.

Abstract: A form of calcium carbonate, acid-stabilized by the addition to finely divided calcium carbonate of one of a calcium- chelating agent and a conjugate base, such as sodium hexametaphosphate, followed by the addition of a weak acid, such as phosphoric acid, is disclosed. A process for producing this material, and a method for its use in the making of neutral to acidic paper in order to improve the optical properties of the paper are also disclosed.

Abstract: A form of calcium carbonate, acid-stabilized by the addition to finely divided calcium carbonate of one of a calcium- chelating agent and a conjugate base, such as sodium hexametaphosphate, followed by the addition of a weak acid, such as phosphoric acid, is disclosed. A process for producing this material, and a method for its use in the making of neutral to acidic paper in order to improve the optical properties of the paper are also disclosed.

Abstract: This invention relates to a process for the preparation of high surface area rhenium sulfide hydrodesulfurization catalysts and to a process of using such catalysts for hydrotreating, particularly hydrodesulfurizing heavy hydrocarbons. The catalyst may be supported during use. They are preferably made using an aqueous procedure for forming the solid ReS.sub.2+s precursor. The precursor is then heated for a period of time in substantially pure H.sub.2 S.

Abstract: A method of propagating rotavirus in vitro which comprises growing the virus in cell cultures susceptible to the virus in the presence of a serum-free medium containing a proteolytic enzyme. Such a method promotes the growth of virus in tissue culture, thus providing large quantities of antigen for immunization and for use in diagnostic tests.

Abstract: A novel antigenic preparation which comprises a plurality of microvesicles which microvesicles are unilamellar bodies comprising a single lipid bilayer upon the exterior surface of which is bound an antigenic protein derived from a virus and having a hydrophobic region.

Abstract: A preparation of rotavirus inner capsid antigenic subunits which is substantially free from complete virus particles and fragments thereof. The subunits have a sedimentation coefficient of 17.5S, and a molecular weight of >2.times.10.sup.5 and >2.times.10.sup.6. Such a preparation can be prepared by suspending a sample of faecal material obtained from a mammal infected with rotavirus, incubating the suspension followed by the removal and concentration of the subunits from the suspension by centrifugation and/or filtration. Such a preparation is useful in several immunological tests and for the preparation of antisera also for use in tests.

Abstract: A novel antigenic preparation which comprises a plurality of microvesicles are unilamellar bodies comprising a single lipid bilayer upon the exterior surface of which is bound an antigenic protein derived from a virus and having a hydrophobic region.

Abstract: A movable picture poster supported by a take-up roller and a supply roller. The drive mechanism of this picture poster unit is composed of means to vary speed, vary direction, to start and stop as well as means to control the time during which the picture poster is exposed for viewing.