Abstract: Methods and apparatus for analyzing a sample using at least one detector are disclosed.

Abstract: Methods and apparatus for analyzing a sample using at least one detector are disclosed.

Abstract: Methods and apparatus for analyzing a sample using at least one detector are disclosed.

Abstract: Methods and apparatus for analyzing a sample using at least one detector are disclosed.

Abstract: A coating composition comprising low sodium containing colloidal silicas and ink jet recording sheets prepared from such coatings are described. The coating comprises binder and colloidal silica preferably having an average particle size in the range of about 1 to about 300 nanometers and which has a solids to alkali metal ratio of at least the sum of AW(?0.013SSA+9), AW being the atomic weight of alkali metal present in the colloidal silica and SSA being the specific surface area of the silica. It has been discovered that if the alkali metal, e.g., sodium, content of colloidal silica is reduced, coatings prepared from such colloidal silica and applied to conventional ink jet recording sheet supports provide a specular gloss of at least 30 at 60° C., even at a relatively high silica solids to binder solids ratio of 1:1 or greater.

Abstract: The invention relates to a desiccant based on clay-bound zeolite which is characterized in that it comprises hygroscopic salt and optionally further conventional additives. Preferably, it is present in the form of granules, the hygroscopic salt being arranged in the pores of the granular particles. Furthermore the invention relates to a process for the preparation of the desiccant as well as its use, in particular in insulating glass windows and spacers for insulating glass windows.

Abstract: Formulations comprising novel porous metal oxide particles and binder are particularly suitable for ink receptive coatings, e.g., for ink jet papers and films. The metal oxide particles used in this application have a porous structure that differs significantly from the nonporous silica colloids. The particles have a median particle size in the range of about 0.05 to about 3 microns and porosity such that when an aqueous dispersion of the particles is dried at least 0.5 cc/g of pore volume is from pores having a pore size of 600 ? or less. The particles also have a viscosity derived pore volume of at least 0.5 cc/g.

Abstract: The present invention relates to a solid and method useful in separating chemical components in a complex mixture when at least one of the chemical components of the mixture is capable of being selectively adsorbed. The solid of the present invention comprises an inorganic substance and moieties (R10) located on at least one surface of the inorganic substance, wherein said inorganic substance is an inorganic oxide and the surface moiety is selected from the group consisting of —CH2OH, —CH(OH)2, —CH(OH)CH3, —CH2CH2OH, —C(OH)2CH3, —CH2CH(OH)2 and —CH(OH)CH2(OH). Binding moiety, optionally attached to the inorganic substance via a linker, can also be located on the surface of the solid.

Abstract: The invention pertains to precipitated silica particles having edged surfaces and a length: width: depth ratio of 1:1:1 to 3:3–1:1 with the length being 0.25 to 15 mm, an absorbing capacity PV water (wt. % >;125, a pore volume PV Hg (ml/g) 0.8–4, a pore volume PV N2 (ml/g) 0.2–1.5, a bulk density BD (g/l) 200–500, and preferably a pH<8, for use as a cat liter.

Abstract: A chromatographic device comprises a chromatographic tube, a chromatographic medium, a piston assembly, an elongate rod, and a threaded member. The piston assembly is within the tube and is positioned generally between a first end of the tube and the chromatographic medium. The chromatographic medium is generally between the piston assembly and a second end of the tube. The elongate rod extends partially into the chromatographic tube such that the piston assembly is between the elongate rod and the second end of the chromatographic tube. The elongate rod has a threaded outer surface. The threaded member is threaded to the threaded outer surface of the elongate rod. The treaded member is operatively secured to the chromatographic tube.

Abstract: The present invention relates to a solid and method useful in separating chemical components in a complex mixture when at least one of the chemical components of the mixture is capable of being selectively adsorbed. The solid of the present invention comprises an inorganic substance and moieties (R10) located on at least one surface of the inorganic substance, wherein said inorganic substance is an inorganic oxide and the surface moiety is selected from the group consisting of —CH2OH, —CH(OH)2, —CH(OH)CH3, —CH2CH2OH, —C(OH)2CH3, —CH2CH(OH)2 and —CH(OH)CH2(OH). Binding moiety, optionally attached to the inorganic substance via a linker, can also be located on the surface of the solid.

Abstract: A chromatographic device comprises a tube, a chromatographic medium, a piston assembly, and a locking mechanism. The tube comprises first and second opposite ends and an inner surface. The inner surface of the tube at least in part defines an intermediate region. The intermediate region is generally between the first and second ends. The chromatographic medium is within the intermediate region. The piston assembly is within the tube and is positioned generally between the first end of the tube and the chromatographic medium. The piston assembly defines a passage for flow of process fluid. The piston assembly comprises a piston body portion. The locking mechanism is adjacent the piston assembly and is in engagement with the inner surface of the tube in a manner to prevent movement of the piston assembly relative to the tube axially toward the first end of the tube without preventing movement of the piston assembly relative to the tube axially toward the second end of the tube.

Abstract: Adsorbent particles comprising superparamagnetic and/or low Curie Temperature transition metal-containing cores surrounded by a hydrous siliceous oxide coating can be formed by an aqueous process wherein the core is precipitated from an aqueous solution and a siliceous oxide coating is deposited thereon while complete drying of the core is avoided until after the siliceous oxide is deposited. The resulting siliceous adsorbents exhibit strong superparamagnetic and/or low Curie temperature magnetic properties with low transition metal leachability.

Abstract: A coating composition comprising relatively low alkali cationic colloidal silicas and ink jet recording sheets prepared from such coatings is described. The coating comprises binder and cationic colloidal silica preferably having an average particle size in the range of about 1 to about 300 nanometers and which has a solids to alkali metal ratio of at least the sum of AW(?0.013SSA+9), AW being the atomic weight of alkali metal present in the colloidal silica and SSA being the specific surface area of the silica. It has been discovered that if the alkali metal, e.g., sodium, content of colloidal silica is reduced, coatings prepared from such colloidal silica and applied to conventional ink jet recording sheet supports provide a specular gloss of at least 30 at 60° C., even at a relatively high silica solids to binder solids ratio of 1:1 or greater.

Abstract: A coating composition comprising cationic colloidal silicas and ink jet recording sheets prepared from such coatings is described. The coating comprises binder and polydispersed cationic colloidal silica. The cationic colloidal silica preferably has an average particle size in the range of about 1 to about 300 nanometers. It has been discovered that if a cationic polydispersed colloidal silica is employed in a glossy coating formulation, the coating provides a specular gloss of at least 30 at 60° C., even at a relatively high silica solids to binder solids ratio of 1:1 or greater, but also a coating having good to excellent printability characteristics.

Abstract: A silica gel abrasive having good cleaning and low abrasion is prepared by combining at least two silica gels before adjusting the pH of the abrasive to a pH in the range of 3-6. One of the gels is washed at relatively lower temperature compared to the wash temperature of a second gel. The two gels are then milled and dried to a median particle size in the range of 5 to 12 microns. The volatiles content of the gel combination is in the range of 20-40% by weight. The resulting mixtures have low abrasion as measured by Einlehner, e.g., in the range of 0.5 to 3 when measured using a brass screen. A dentifrice composition comprising 10 to 25% of the abrasive has a PCR of at least 80 and can obtain PCR's greater than 100.

Abstract: A coating composition comprising a relatively low alkali-containing colloidal silica and glossy ink jet recording sheets prepared from such coatings is described. The coating comprises binder and colloidal silica, e.g., having an average particle size in the range of about 1 to about 300 nanometers. The low alkali colloidal silica of this invention comprises ammonia, polydispersed colloidal silica, or both. Polydispersed silicas having a particle size distribution such that the median particle size is in the range of 15 to 100 nanometers and 80% of the particles span a range of at least about 30 to about 70 nanometers are preferred. It has been discovered that coatings prepared from such colloidal silica and applied to conventional ink jet recording sheet supports have a specular gloss of at least 30 at 60° C., and excellent printability at silica solids to binder solids ratio of 1:1 or greater.

Abstract: The invention pertains to an amorphous silica particle comprising 0.1 to 105 ppm boron atoms, and optionally 0.05 to 15 wt. % aluminum atoms wherein the boron and aluminum atoms are covalently bonded to the oxygen atoms of the silica network. The amorphous silica particles are used as a reinforcing filler for rubber articles, particularly for tires, more particularly for tire treads.

Abstract: Formulations comprising novel porous metal oxide particles and binder are particularly suitable for ink receptive coatings, e.g., for ink jet papers and films. The metal oxide particles used in this application have a porous structure that differs significantly from the nonporous silica colloids. The particles have a median particle size in the range of about 0.05 to about 3 microns and porosity such that when an aqueous dispersion of the particles is dried at least 0.5 cc/g of pore volume is from pores having a pore size of 600 ? or less. The particles also have a viscosity derived pore volume of at least 0.5 cc/g.

Abstract: The coating composition comprises inorganic oxide, e.g., silica, in combination with a binder system comprising a mixture of a water soluble polymer and non-ionic latex polymer. The composition may contain optional dye mordant (e.g., cationic polymer). It is found that the combinations of these components result in relatively high solids formulations (e.g., greater than 20% by weight) with relatively low viscosity (less than 5000 centipose), do not exhibit coating dusting, and give exceptional ink-jet printability. These formulations are especially suitable for preparing on-line formulations because they can be formulated to have a viscosity less than 2000 centipose. Preferable embodiments for online coatings have a viscosity less than 1000 centipose.