Abstract: A device for dispensing liquid material is disclosed having an ampoule with at least four storage lumens, a mixing tip coupled to a distal end of the storage lumens, and an outlet lumen in fluid communication with storage lumens via the mixing tip. The at least four storage lumens extend axially along the length of an ampoule body, and the mixing tip has at least four gasket seats formed therein, each gasket seat corresponding to one of the storage lumens. The device also includes a first fluid provided in one of the storage lumens and a second fluid having a characteristic different from the first fluid provided in another of the storage lumens. Each of the storage lumens has a proximal gasket sealing the fluids from a proximal end of the ampoule and a distal gasket sealing the fluids from a distal end of the ampoule.

Abstract: A dispensing device is disclosed having an ampoule with at least four storage lumens extending axially along the length of an ampoule body, a mixing tip coupled to a distal end of the storage lumens, the mixing tip having at least four gasket seats formed therein, each gasket seat corresponding to one of the storage lumens, and an outlet lumen in fluid communication with the storage lumens.

Abstract: A container used for chromatographic sample analysis has (a) at least one silica uppermost layer, which is deposited onto the container using a liquid phase deposition process, and, optionally, (b) at least one indicator present in at least part of the at least one silica uppermost layer for visually distinguishing the container from other containers, and/or determining the “use status” of the container, and/or identifying the proper orientation of the container when it is to be put in use, and/or providing a means of decoration, identification, or counterfeit detection. In one preferred embodiment, the indicator is thermochromic. In another preferred embodiment, the indicator is photochromic.

Abstract: A gas chromatography inlet liner comprises a glass tube formed by a glass wall, the glass wall having pore channels formed therein, and an indicator present in the pore channels in at least part of the inlet liner. The indicator may be any element, compound, dopant, or mixture additive that modifies color or transparency of the inlet liner.

Abstract: It is an object of the invention to improve the current QuEChERS technology. In one aspect of the invention, the buffer-salt powder mixture of the first stage of the QuEChERS process is compressed into a solid dosage form before it is used in the first stage of the QuEChERS process. Replacing the QuEChERS powders (the buffer-salt powder mixture of the first stage of the QuEChERS process) with solid aliquots eliminates the need for using centrifuge tubes for packaging the product.

Abstract: A compound of formula (I), wherein W is formula (1); A is a benzene ring, a fÊve-membered heteroaromatic ring containing 1, 2 or 3 heteroatoms independently chosen from O, N and S, providing that no more than one O or S atom is present, or a six-membered heteroaromatic ring containing 1, 2 or 3 N atoms; n is zero, one, two or three; when n is zero or one, V is CH2; when n is two or three, V is CH2, O or NR5; when V is CH2, the bond formed by V and an adjacent carbon ring atom is optionally fused to a phenyl ring, a five-membered heteroaromatic ring containing 1, 2 or 3 heteroatoms independently chosen from O, N and S, providing that no more than one O or S is present, or a six-membered heteroaromatic ring containing 1, 2 or 3 N atoms; the ring being optionally substituted by one or more R1 groups; and R7 and R8 are independently hydrogen, hydroxy, halogen or C1-4alkyl; Z is a phenyl ring, a five-membered heteroaromatic ring containing one, two, three or four heteroatoms independently chosen from O, N or S, at

Abstract: A gas chromatographic device comprises an inlet system and a chromatography column. The inlet system includes a liner having pressure reducing means contained therein for reducing pressure between an inlet of the pressure reducing means and an outlet of the pressure reducing means. When the devise is in use, the chromatography column is positioned in the liner of the inlet system downstream from the pressure reducing means, and the chromatography column is under vacuum at its outlet.

Abstract: A gas chromatography inlet liner comprises a glass tube formed by a glass wall, the glass wall having pore channels formed therein, and an indicator present in the pore channels in at least part of the inlet liner. The indicator may be any element, compound, dopant, or mixture additive that modifies color or transparency of the inlet liner.

Abstract: A gas chromatographic device comprises an inlet system and a chromatography column. The inlet system includes a liner having pressure reducing means contained therein for reducing pressure between an inlet of the pressure reducing means and an outlet of the pressure reducing means. When the devise is in use, the chromatography column is positioned in the liner of the inlet system downstream from the pressure reducing means, and the chromatography column is under vacuum at its outlet.

Abstract: Increased stability of derivitization agents on the surfaces of packing material used in choromatography is described. In particular, the stability of the organosilanes on silicia surfaces used in chromatography is increased, thereby creating a more durable coating of organosilanes. By increasing its stability, the organosilane entity becomes more resistant to de-bonding and the durability of the underlying surface is enhanced against dissolution. Thus, chromatographic separations are able to be performed at higher and lower pH ranges and higher temperatures. The stability can be increased through attachment of polydentate silanes which are either pre-polymerized and then surface bonded or can be bonded first and then cross-polymerized afterward, yielding a polymerized polycarbosilane backbone that is very stable against hydrolytic cleavage conditions.

Abstract: Increased stability of derivitization agents on the surfaces of packing material used in choromatography is described. In particular, the stability of the organosilanes on silicia surfaces used in chromatography is increased, thereby creating a more durable coating of organosilanes. By increasing its stability, the organosilane entity becomes more resistant to de-bonding and the durability of the underlying surface is enhanced against dissolution. Thus, chromatographic separations are able to be performed at higher and lower pH ranges and higher temperatures. The stability can be increased through attachment of polydentate silanes which are either prepolymerized and then surface bonded or can be bonded first and then cross-polymerized afterward, yielding a polymerized polycarbosilane backbone that is very stable against hydrolytic cleavage conditions.

Abstract: A fitting provides a means of making a union between a tube and a female fitting with low dead volume and without the use of tools. The fitting is comprised of a tube member that is pressed into the female fitting to automatically remove dead volume. The tube member is pressed into the fitting by a spring with the appropriate tension to hold the tube member against the expected pressure. The fitting also is comprised of a two piece nut assembly. The forward nut compresses a ferrule to create the high-pressure seal. The rearward nut is attached to the forward nut and provides compression and a holding means for the spring.

Abstract: An overhead garage door having a plurality of pivotally interconnected panel structures and a reinforcing strut to allow use of the door in hurricane prone environments. The reinforcing strut extends the full width of the door across the inside rear face of the door and includes widely spaced straight upper and lower horizontal legs extending rearwardly from the rear faces of the stiles of the panel structure joined by a semi-circular top section extending in a continuous convex curvilinear sweep between the two legs. The radius of curvature of the semi-circular section is relatively large compared to the length of the upper and lower leg sections, giving the beam a wide stance. For example, the radius of curvature of the top section may be approximately 1.25" and the leg section length may be between about 2.5" and 5". The strut may be roll-formed or shaped by bending flat stock on, for example, a press brake.

Abstract: Methods for the solvent extraction of organic analytes from a sample are provided. An organic solvent system is used to extract analytes under elevated temperatures and pressures above 100 psi but below supercritical conditions in short times and with low amounts of solvent. The extracted organic analytes are then removed by flowing a purge fluid through the extraction cell, the cell being maintained at a constant volume throughout the extraction and purging, afterwards the analytes being analyzed.

Abstract: A tailgate for a pickup truck (10) includes an integrated air foil mechanism mounted in an open top cargo area (12) defined by two side walls (14) and (16), a front end and an open trailing end. The tailgate includes two control frames (20) and (22), a main air foil wing (24) and control apparatus. The two control frames (20) and (22) are mounted on the pickup truck side walls (14) and (16) at the open trailing end of the cargo area. The main air foil wing (24) has two ends, each end pivotally mounted to the control frames (20) and (22), such that the main air foil wing (24) spans the opening between the control frames (20) and (22).

Abstract: Apparatus such as a cofferdam 1, intended to be partially buried in ground beneath water comprises a hollow structural framework. The framework includes chambers 12 which have inlets 29 via which pressurized water can be supplied to the chambers. Each chamber 12 communicates with a plurality of nozzles 36 from which jets of the pressurized fluid issue to break up the ground below. Each chamber 12 also communicates with a plurality of water operated pumps 25 via inlets 24. The pumps 25 are operated by the pressurized water to draw or suck water-suspended solids from below through the pumps via the inlets 32 and discharged from the pumps via outlets 28.

Abstract: The present invention relates to novel liquid crystalline compounds having the following formula: ##STR1## In the above formula, a is 1 or 2, or R.sub.1 and R.sub.2 may be virtually any chemical groups which will maintain the liquid crystalline properties of the resultant compound. The novel compounds of the present invention contain a biphenylcarboxylate ester moiety so as to define a new class of liquid crystalline compounds. The present invention further includes polymers made from the novel liquid crystalline compounds by attaching the compounds to a polymer backbone such as a polysiloxane backbone. Additionally, the present invention also contemplates methods for using such polymers as stationary phases in the chromatographic analysis of various chemical compounds, such as polycyclic aromatic hydrocarbons (PAH).