Abstract: Improved diazonium affinity matrixes are provided which are storable stable and may be stored for extended periods for future use. The improved affinity matrixes are diazonium silica gel affinity matrixes containing an amine linkage and especially the fluoborate salts thereof.

Abstract: A chromatography column adapted to be used in high performance liquid chromatography which includes an elongated tubular hollow column of rigid material which is enclosed by an outer tubular sleeve. End fittings are removably attachable to opposite ends of the outer tubular sleeve and have longitudinal passageways extending through their length, said passageways terminating in an enlarged bore at their innermost ends wherein ring means are insertable. Opposite ends of the column are also insertable into the enlarged bores of the end fittings. The end fittings are adjustably securable to opposite ends of the sleeve so that opposite ends of the column are brought into secure and sealing abutment with the ring means which in turn are sandwiched against the end fittings.

Abstract: Thickening of paper pulp, or a like suspension, is effected prior to feeding the pulp to an apparatus utilizing stationary screens for effecting washing, bleaching, or further thickening of the pulp. The stationary screens are mounted in a top portion of a vertical-axis vessel, and a plurality of radially extending rotating hollow arms, with annular screens mounted on them, is provided in the bottom of the vessel to effect thickening of the suspension from, for example, 11/2% consistency to about 9-14% consistency. Extraction from the hollow arms is provided through conduits extending vertically through a hollow shaft for rotating the arms, and a filtrate valve is also mounted within the hollow shaft in operative communication with the filtrate conduits, and includes a valve member which is rotatable in a different direction, and at a different speed, than the hollow shaft.

Abstract: A valve is provided for precisely controlling fluid flow at low flow rates and simultaneously filtering said fluid. The valve employs a resilient porous filtering medium interposed in the flow path and capable of undergoing adjustable compression by means of a threaded shaft associated with an external handle. When the filtering medium is compressed, it provides greater occlusion of the flow path, thereby diminishing flow rate through the valve. The valve is readily dismantled to facilitate cleaning or replacement of the filtering medium.

Abstract: An improved chromatographic analytical column, the column containing a pellicular type (agglomerated) anion-exchange packing, comprising:Component A, which comprises a pressure packed bed of substrate particles of insoluble synthetic resin, having cation-exchanging sites at least on their available surfaces, the Component A particles being of low porosity relative to Component B microparticles, described below, andComponent B, derived by agglomerating microparticles of insoluble synthetic resin onto the pressure packed bed of Component A particles, the microparticles having a volume average diameter of less than about 1,500 and greater than about 50 Angstroms and having anion-exchanging sites, at least on their outer surfaces, which attract available cation sites of Component A, wherein the microparticles of Component B are attached as a monolayer to the available surfaces of the Component A particles.

Abstract: An industrial water intake comprising a screen for screening water and a spray nozzle for detaching deposited debris from the screen and entraining it into a debris recovery channel on the other side of the screen from the spray nozzle. A cylindrical rotary member comprising a roller is arranged along the adjacent longitudinal edge of the debris recover channel. The rotary member rotates in a direction tending to carry debris falling on or coming in contact with the longitudinal edge into the channel to prevent the build up of debris thereon. The rotary member extends above and is disposed inwardly of the longitudinal edge relative to the debris recovery channel. The rotary member is usable on recovery channels for band screens, drum screens or even bar screens associated with trash rakes.

Abstract: Apparatus has a receiving chamber subjected to low pressure to receive solid/liquid mixture through inlet valve thereof. The chamber also has outlet valve to discharge the mixture, an admitting valve to raise pressure in the chamber, and quantity sensing structure responsive to predetermined quantity of mixture within the chamber. The inlet valve is positioned above a predetermined upper level of mixture within the chamber, and a riser constrains the mixture to move initially upwardly and then, optionally, downwardly prior to discharging through the inlet valve. The riser is shaped to cause solids that might otherwise tend to rest initially adjacent the inlet valve, when the mixture flow therethrough ceases, to fall under gravity either forwardly through the inlet valve, or backwardly towards mixture within the delivery duct.

Abstract: A filter mesh constructed from a plurality of structural members. Each member has a central body portion and a plurality of extensions extending therefrom such that when such sections are assembled together the extensions hold the body members in spaced relation and define a plurality of orifices in the structure. The extensions preferrably extend to one side of the body members and are preferrably shaped such that a contoured surface is effectively formed to one side of the body members, such contoured surface simulating the surface of a woven mesh. A variety of mesh patterns may be duplicated by the appropriate alterations in the placement and conformity of the extensions relative to the body portions of the structural members.

Abstract: A lifting mechanism for a rake arm and rake structure employed to move sediments settling out from a solids-liquid slurry in a sedimentation tank, includes a fixed center column (27) in the tank and a concentric movable column (28) in telescoping relation to the fixed column. A first series of sheave assemblies (40) are attached to or fixed with respect to the fixed column and a second series of sheave assemblies (51-55) attached to the movable column at a vertically displaced distance from the first series. The respective sheave assemblies may extend in part in an annulus (34) between the fixed and movable columns and are positioned around the peripheries of the respective columns. A continuous cable (45) extends alternately between individual sheaves in each series and the ends of the cable are attached to a vertical take-up drum (38).

Abstract: A filtration apparatus comprising a filter tank, a support provided at least at a lower interior portion of the filter tank, a filter medium layer composed of fiber lumps accumulated on the support, a filter medium spreading zone provided within the filter tank above the support, air injecting means disposed under the filter medium layer, prefilt inlet means disposed at an upper portion of the tank, and filtrate outlet means disposed at a lower portion of the tank. The apparatus is simple in construction and easy to operate, assures depth-type filtration with high accuracy and is easy to wash for the reuse of the filter medium.

Abstract: An apparatus is provided informing when a filter located in a fuel passage between a fuel tank and a fuel injection pump has clogged a predetermined amount. The apparatus is responsive to fuel pressure downstream of the filter to provide an indication when the sensed pressure is below a predetermined value. A device for draining water separated from the fuel is also disclosed.

Abstract: A system wherein suspended solids are separated from liquids by passage through a filter after a precoat of filter aid has been deposited on a filter septum. The subsequent addition of filter aid to the liquid and its deposit on the precoat are so regulated that the filter cake produced maintains a practical specific cake resistance to flow therethrough at a preselected value, even if the concentration of suspended solids varies with time, said value being the ratio .DELTA.R/.DELTA.W, where .DELTA.W is a small increment of filter aid weight fed and .DELTA.R is an incremental increase in cake resistance to flow corresponding to that increment .DELTA.W, both increments being on a per unit of filtration area, and the resistance to flow being the differential pressure across the filter cake divided by the flow rate per unit of filtration area.

Abstract: This invention relates to settlement tank installation for the clarification of liquids particularly water and including an inclined plate assembly for solids removal. The plate assembly comprises a multiplicity of flexible sheets suspended from an upper end and weighted at their lower ends which are located to give the desired angle of inclination to the sheets wherein preferably the upper ends of the sheets are connected to a fixed frame and the lower ends to a movable frame through rods extending across the frame and attached to the sheets.

Abstract: A gas extractor for processing crude oil to provide the energy to power an internal combustion engine driving a conventional oil pumping unit. the extractor comprises a vertical tank, an extractor chamber, an exhaust gas pipe passing through the tank with a plurality of baffle pans mounted longitudinally thereon; a crude oil reservoir in the top of the tank, valve means controlling the rate of oil flow from the reservoir to the upper baffle pan; means to vary the amount of exhaust gases passed through the exhaust pipe to control the temperature of the extractor chamber; a gas outlet passage, air inlet passage and oil drain passages in the extractor chamber, each adjacent baffle pan being oppositely tilted and having a drain opening at its lower side whereby the oil passing through the extractor flows across each adjacent oil pan before being drained from the extractor.

Abstract: The method of transfer of macromolecules such as nucleic acid and proteins from a chromatographic substrate to an immobilizing matrix uses as the immobilizing matrix, a charge modified microporous membrane comprising an organic microporous membrane having a charge modifying amount of a cationic charge modifying agent bonded to substantially all of the wetted surfaces of said membrane. The charge modified microporous membrane can also be a reinforced microporous membrane, preferably a porous reinforcing web impregnated with a polymeric microporous membrane. A nucleic acid or protein blotting product comprising a chromatographic matrix having the charge modified microporous membrane on a surface thereof is also provided.

Abstract: A packing material for chromatographic use comprising an inorganic carrier having hydroxyl groups at the surface thereof having grafted thereon an organosilane derivative selected from the group consisting of a urea derivative obtained by reacting an optically active isocyanate with an aminoalkylsilane, an N-carbomoyl amino acid derivative obtained by reacting an optically active amino acid carbamoylated by isocyanate with an aminoalkylsilane and an O-carbamoyl hydroxy acid derivative obtained by reacting an optically active hydroxy acid carbamoylated by isocyanate with an aminoalkylsilane is disclosed. This packing material is useful as a packing material for liquid chromatography analysis which comprises separating and analyzing an enantiomer mixture of a compound having an --OH group, a --CONH-- group, ##STR1## a --COO-- group, an --NHCOO-- group, an --NHCONH-- group or ##STR2## bonded to an asymmetric carbon atom thereof.

Abstract: In liquid chromatography apparatus including rigid tubes and pliable tubes that convey fluids between various sections of the apparatus, fluid tight connections are made between such tubes by having the O.D. of a rigid tube about equal to the I.D. of a pliable tube, inserting an end of the rigid tube into an end of the pliable tube, providing a short tubular member having a threaded bore that tapers from an opening at one end large enough for the pliable tube to enter to an opening at the other end substantially smaller than the O.D. of the pliable tube, but larger than the O.D. of the rigid tube, sliding the tubular member along the rigid tube until its large opening end engages the pliable tube and then rotating the tubular member so that it threads itself over the outer surface of the pliable tube, deforming it and compressing it against the inserted end of the rigid tube.

Abstract: A molecular separation column for effecting the differential distribution, between two phases, of the components of a sample flowing therethrough. The column contains a substantially homogenous solid stationary phase which comprises a porous matrix of fiber having particulate immobilized therein, wherein at least one of said fiber or particulate is effective for molecular separation. The column is characterized by a reduced pressure drop, increased axial dispersion, more uniform peak shapes and better separations at high sample loading.

Abstract: The present invention relates to a new type of chromatography technique, referred to as dynamic column chromatography, for separation of one or more compounds present in a solution, which is characterized by the existence of a moving solid adsorbent bed. According to the invention, the chromatographic system comprises a piston having at its bottom a sealing element and a longitudinal channel containing the adsorbent between two barriers and a test tube having at its bottom a multiple way valve. By pushing the piston into the test tube, the desired eluent which was prior forced through said valve is entering under intrinsic pressure of the closed system through the channel moving the adsorbed compounds to be separated between said barriers, the solution obtained going out through a nozzle located at one of the end parts of the piston.

Abstract: A gas chromatographic column comprising synthetic fused silica tubing irradiated in its raw state with gamma radiation of pre-selected dosage and dosage rate. The column further comprises a stationary phase coating of cyano-silicone immobilized and stabilized by cross-linking in situ by means of further irradiation by gamma radiation.