Abstract: A blood bag is described which aids in maintaining the separation of blood components. This bag is constructed of a flexible plastic, has a conical top leading to an outlet line and internal septa to reduce swirling of the bag's contents during rotor deceleration. The bag is adapted to be placed in a split sleeve prior to placement in the swinging bucket of a centrifuge rotor. A collar is placed over the top of the bag to aid in reducing wrinkles in the bag.Methods are described for reducing contamination of separated blood components by reducing bag wrinkles, reducing swirling of the blood fractions during rotor deceleration, and reducing mixing during expression.

Abstract: A blood bag is described which aids in maintaining the separation of blood components. This bag is constructed of a flexible plastic, has a conical top leading to an outlet line and internal septa to reduce swirling of the bag's contents during rotor deceleration. The bag is adapted to be placed in a split sleeve prior to placement in the swinging bucket of a centrifuge rotor. A collar is placed over the top of the bag to aid in reducing wrinkles in the bag.Methods are described for reducing contamination of separated blood components by reducing bag wrinkles, reducing swirling of the blood fractions during rotor deceleration, and reducing mixing during expression.

Abstract: Removal of acrylonitrile from latex by azeotropic distillation with methanol.

Abstract: The channel in a sedimentation field flow fractionation apparatus is improved by the use of a heavy liquid layer formed of a water immiscible, chemically inert, nontoxic material. This thin, heavy liquid layer prevents the sample from plating on the outer channel wall thereby permits a less perfect finish to be formed and to some degree corrects lack of circularity of the channel. Where multiple channels are used, the use of this layer reduces leakage between adjacent channels.

Abstract: A polymeric heat resistant photopolymerizable composition of a polyamide ester resin containing photopolymerizable groups useful for forming relief structures on electrical devices such as capacitors, integrated circuits, printed circuits and semiconductors; a solution of the composition is applied to a substrate such as a coated silicon wafer which is the base for an electrical device, dried to form a film, the film is exposed to radiation through a pattern and photopolymerized; the unexposed and unpolymerized part of the film is dissolved off and the resulting relief structure is converted to a polyimide structure with sharp definition and has good mechanical, chemical and electrical properties; to reduce radiation exposure time and increase the rate of photopolymerization the following constituents are used in the composition:radiation sensitive polymerizable polyfunctional acrylate compound and photopolymerization initiators containing hydrogen donor initiator and aromatic biimidazole, and an oxygen scave

Abstract: In order to produce a preform or parison from which an optical fiber can be drawn, a vitrifiable substance such as silicon chloride and a doping agent such as germanium chloride, for example, are fed in liquid form and at room temperature to a spray nozzle together with water or steam for continuous deposition on a relatively rotating and axially reciprocating inner or outer surface of a cylindrical support until that surface is covered with a heavy layer of as yet unvitrified hydrated silica admixed with the doping agent in proportions designed to provide a selected refractive-index profile. The resulting preform, after degassing and separation from the support if necessary, is freed from occluded water molecules by exposure to a flow of hot dehydrating gas which may contain anhydrous compounds and is thereafter collapsed into a solid rod and completely vitrified at high temperatures.

Abstract: A polarographic catheter-shaped probe for determining analytical data of logical fluids of human beings, of animals, or of plants, and having a cathode, an anode and an electrolyte connecting the two, which are surrounded by a flexible sheath sealed in the tip region of the cathode by an ion-impermeable but gas-permeable membrane, wherein the anode is arranged at the distal end of the catheter shaft away from the cathode tip, the electrolyte extends from the anode to the tip of the cathode within the probe, and the anode and cathode are connected to a terminal jack for measuring instruments located at the end of the probe facing the anode. The jack optionally contains a supply chamber for the electrolyte, which is connected in a liquid-tight manner to the one end of the catheter shaft.

Abstract: Process for preparing "living" polymers from acrylic-type or maleimide monomers and organosilicon, -tin or -germanium initiators.

Abstract: A plasma-arc furnace comprises a casing with plasma torches, particularly ree torches, mounted therewithin in symmetrical relationship relative to the vertical axis thereof. Each of these torches comprises a body provided with a nozzle and an axial conduit for feeding a plasma-forming gas therethrough, and a cylindrical electrode disposed within said conduit. According to the invention, the distance between the centers of working ends of electrodes disposed within adjacent plasma torches is not more than 15 diameters of the electrode.

Abstract: Carbonylation of olefins is carried out in the presence of a hydroxylic compound, carbon monoxide and a catalyst system comprising an organic phosphine liganded palladium compound and a perfluorosulfonic acid.

Abstract: Vinyl ether monomers derived from diesters of the formula: ##STR1## wherein R is CH.sub.3 or C.sub.2 H.sub.5 and n is 0 to 10; copolymers of the vinyl ether monomers with one or more selected perfluorinated monoolefins; articles of manufacture made from the copolymers; process for making the diesters; process for using copolymer membranes in a chlor-alkali cell.

Abstract: Solutions and membranes formed therefrom are disclosed with solvents having completely halogenated, saturated, hydrocarbon backbones and solubility parameters within a particular range. Preferred solvent have at least one ether linkage. An exemplary solvent is ##STR1## wherein X is F, Cl, Br, and I; n is 0, 1, and 2; m is 1, 2, and 3; and Y is COOCH.sub.3 and SO.sub.2 F. The solutions include perfluorinated copolymers having high equivalent weight which have been prepared from tetrafluoroethylene and perfluorinated sulfonyl fluoride- or carboxyl-containing vinyl monomers.

Abstract: A blood bag is described which aids in maintaining the separation of blood components. This bag is constructed of a flexible plastic, has a conical top leading to an outlet line and internal septa to reduce swirling of the bag's contents during rotor deceleration. The bag is adapted to be placed in a split sleeve prior to placement in the swinging bucket of a centrifuge rotor. A collar is placed over the top of the bag to aid in reducing wrinkles in the bag.Methods are described for reducing contamination of separated blood components by reducing bag wrinkles, reducing swirling of the blood fractions during rotor deceleration, and reducing mixing during expression.

Abstract: An improved spectrophotometer having a light source, a scanning type monochromator that provides light beams of different wavelengths over a light spectrum being scanned, and an object photometer for measuring the intensity of reflected light from an object being tested and generating an electrical signal proportional to the intensity of the light measured and connected to means for recording the signal as a function of wavelength measured, the improvement used therewith comprising:(a) a beam splitter that divides the beam exiting from the monochromator into first and second light beams, whereby the first beam is incident upon the object;(b) a reference photometer that measures the flux of the second light beam and generates an output electrical signal proportional to the intensity of the light measured; and(c) a light source control, connecting the reference photometer and the light source, which receives the electrical signal from the reference photometer and generates a feedback electrical signal to adjust

Abstract: Co-vulcanizable fluoroelastomer blends of tetrafluoroethylene/perfluoro-(methylvinyl-ether)/cure-site monomer terpolymer and hexafluoropropylene oxide/cure-site monomer dipolymer.

Abstract: An improved process is provided for making tufted carpets having bonded nonwoven fabric secondary backings. After the secondary backing has been laminated to a back-sized and tufted primary backing to form a carpet composite, the composite is passed through a nip to emboss the secondary backing and provide a less stiff, easier to install carpet.

Abstract: A dispersion of iron oxide pigments, selected according to particle size to avoid interference with desired properties is added to a polymerizable acrylic composition containing alumina trihydrate as filler. This mixture is cured to form a filled polymeric structure containing 15 to 80% by weight polymethyl methacrylate and 20 to 85% by weight alumina trihydrate with a pleasing uniform color, maintaining desired properties of machinability, translucency, and visual depth.

Abstract: The amount of methacrolein impurity in tetrahydrofuran made from acetylene and formaldehyde can be significantly reduced by treating it with hydrogen peroxide during an interval in the multi-stage distillation tetrahydrofuran refining procedure.