Novel non-ionic contrast media are efficiently prepared from generally available ionic contrast media or non-iodinated precursors. Particularly, polyhydroxyhalo-hydrocarbons are employed with a triiodo-substituted acylamido benzoic acids in aqueous weakly basic media to selectively substitute the amido nitrogen, followed by activation of the carboxyl group for amide formation.

PURPOSE:To make it possible to simply and surely change over the drive mode between high and low speed drive modes, and between four and two-wheel drive modes, by providing such an arrangement that shift forks for change-over devices are shifted in the axial direction thereof by means of cam grooves in a drum member rotated by a motor. CONSTITUTION:When a drum member 30 is rotated by a motor 32 in...

PURPOSE:To control the inclination of a gear to prevent dislocation of an intermeshing pitch circle and generation of the vibration by using a ring helical gear having a large diameter. CONSTITUTION:A large diameter cylindrical shaft 6 is formed integrally with a fitting flange 7 of one end of a gear shaft engaged with a body engagement hole 3 so as to support a helical gear 5 freely to turn. A cy...

A method for controlling a continuously variable transmission (6) having a pair of pulleys each of which includes a groove defined between a stationary pulley element (8,14) and a movable pulley element (10,16), including the step of using hydraulic oil for increasing and decreasing the width of the groove to respectively decrease and increase the radius of rotation of a belt (4) looped around the...

The invention relates to a process for the high yield, cost efficient means of separating enantiomers. The process utilizes a supported liquid membrane and a chiral carrier which selectively complexes with one of the two enantiomeric optical configurations. The invention is also directed to an apparatus adaptable to the continuous and staged separation of enantiomers. In one embodiment, the appara...

An apheresis apparatus and method is disclosed for increasing the purity and yield of platelets separated from donated whole blood in a centrifuge. The whole blood in the centrifuge is diluted by recirculating fluid, such as plasma or saline, at a first flow rate, to mix with further withdrawn whole blood prior to entering the centrifuge. As plasma is collected, it is recirculated through the cent...

Die Erfindung bezieht sich auf einen Fahrzeugreifen mit einer Lauffläche, welche zumindest in einem ihrer axialen Randbereiche in der Draufsicht im wesentlichen axial verlaufende Einschnitte aufweist, die in solcher Weise gewellt sind, daß die Wellenberge und -täler (4,5) im wesentlichen Geraden sind und in der Querebene geneigt. Um die mögliche Bremsverzögerung auf feuchten Straßen zu steigern un...

A water treatment plant has at least one vertical stack of dissolved air flotation clarifiers (114 and 116). Raw water is directed to a single stage clarifier with a shallow tank (114). Its output is fed to an underlying two stage clarifier (116), preferably having tall, mutually isolated cells; inclined baffles over a filtration medium in each cell; a cell-by-cell backwash capability; and an arra...

PURPOSE:To obtain a hydrogen processing-catalyst excellent in desulfurizing activity by depositing groups VI B and VIII metals on an alumina carrier mixed with silica and titania in a specified ratio and having specified properties. CONSTITUTION:From 7 to 25wt.% of a group VI B metal, based on a catalyst and expressed in terms of its oxide, and 3-6wt.% of a group VIII metal on the same basis are d...

PURPOSE:To obtain a catalyst having a large amount of a hydrodesulfurizing active metal supported thereon in a highly dispersed state and having high initial activity and long life by precipitating an alkoxide of every kind as a starting substance and supporting an active component on said substance. CONSTITUTION:An aluminum alkoxide or a substance containing the same is dissolved in an org. solve...

A process is described for producing a catalyst composition for hydrodesulfurization of hydrocarbon oil, which comprises: drying and calcining a carrier comprising alumina or an alumina-containing material impregnated with a solution mixture of (A) at least one of an alkoxide, a chelate compound, or a glykoxide of molybdenum or chromium; (B) at least one of an alkoxide, a chelate compound, or a ...

There is described a method of producing a cam for a jointed camshaft by sintering a compact made from a sintering powder, which is calibrated after sintering and then subjected to quenching and tempering. To avoid extensive rework, it is suggested that the compact be pressed, sintered and calibrated corresponding to a desired contour (4), which differs from the desired contour (1) of the cam cont...

An impedance feedback electrosurgical system (100) is useful with electrosurgical tools (104) to maintain a substantially constant level of current wihtin the tissue in contact with the tool. The system comprises active and return electrodes (108, 112) associated with an electrosurgical tool (104), an impedance monitoring device (116) and a power control unit (118). Energy sufficient to affect tis...

An impedance feedback electrosurgical system (100) is useful with electrosurgical tools (104) to maintain a substantially constant level of current wihtin the tissue in contact with the tool. The system comprises active and return electrodes (108, 112) associated with an electrosurgical tool (104), an impedance monitoring device (116) and a power control unit (118). Energy sufficient to affect tis...

A readily bondable polyester film excellent in antistatic performance, slipperiness, bondability, blocking resistance, water solubility, solvent resistance, chipping resistance, and so forth, and suitable as magnetic recording material, various photographic materials, wrapping material, electrical insulation material, general industrial materials, and so forth. This film is composed of a polyester...

Es wird eine Datenkartenaufnahme (1) vorgeschlagen mit einer Vorrichtung zum unzugänglichen Abdecken wenigstens eines dem Eingeben bzw. Entnehmen von Datenkarten (24, 25) zugeordneten Eingabeschlitzes (8, 9) und einem Gehäuse (2) mit im wesentlichen quaderförmigen Umrissen. Im einzelnen sind in in Seitenwänden (5, 6) des Gehäuses (2) ausgebildeten Kulissen (34/35, 36/37, 38/39 und 40/41) Klappen (...

There are disclosed a copolyester which comprises at least four components of: (A) terephthalic acid and/or its ester forming derivative (terephthalic acid component) and isophthalic acid and/or its ester forming derivative (isophthalic acid component) with a molar ratio of 30/70 to 70/30; (B) 5 to 15 mole % of a dicarboxylic acid having sulfonate group and/or its ester forming derivative based ...

A process for the production of mouldings having a density of at least 120 kg/m<3> from polyurethane foams having a compact surface by foam-moulding a reaction mixture comprising a) a polyisocyanate component, b) a reactive component containing groups which are reactive towards isocyanate groups, c) blowing agents and optionally d) further assistants and additives, where the blowing agents...

PCT No. PCT/SE90/00728 Sec. 371 Date May 18, 1992 Sec. 102(e) Date May 18, 1992 PCT Filed Nov. 9, 1990 PCT Pub. No. WO91/07653 PCT Pub. Date May 30, 1991.The present invention relates to a method and to an apparatus for detecting the presence of bark and for determining the barking degree of wood or chips. Accordingly, the apparatus includes a light source (12) which directs a concentrated light b...

One initial position of the mobile unit (E) is known. The first self-position of the unit is determined relative to the initial position with a position uncertainty. A first distance from the first position to a landmark (L) is determined with a bearing uncertainty. The first position and the landmark serve as the starting map. A second distance from a second self-position to the landmark is deter...