Procedures are described whereby with the aid of recombinant DNA methods the expression of the binding subunit protein of cholera toxin (CTB) or derivatives thereof including hybrid gene fusion proteins to CTB has been brought under control of a foreign (non-cholera toxin) promoter and/or the CTB protein or its derivatives is being synthesized with a foreign rather than the natural leader peptide ...

The invention concerns apparatus for making corrugated tubing. Mold blocks (16) for formation of a travelling mold tunnel are provided with suction to the mold face by means of communication between suction passages in the mold block and a suction chamber (80). Each mold block (16) has a channel which slidingly engages a track of the suction chamber to receive suction as the mold blocks travel ove...

A process for the chlorination of sucrose or a derivative thereof, comprises reaction of the sucrose or derivative thereof with thionyl chloride and a nitrogen base at a ratio of about 1 molar equivalent (ME) of thionyl chloride and about 1 ME of base for every ME of free hydroxyl, in a non-reactive moderately polar solvent. The process is particularly suitable for the preparation of sucralose.

5-Amino-5-deoxy-1,2-O-isopropylidene- alpha -D-glucofuranose is conveniently prepared by a hydride reduction of 5-azido-5-deoxy-1,2-O-isopropylidene- alpha -D-glucuronolactone and can readily be converted to nojirimycin, deoxynojirimycin or homonojirimycin.

A process for the chlorination of sucrose or a derivative thereof, comprises reaction of the sucrose or derivative thereof with thionyl chloride and a nitrogen base at a ratio of about 1 molar equivalent (ME) of thionyl chloride and about 1 ME of base for every ME of free hydroxyl, in a non-reactive moderately polar solvent. The process is particularly suitable for the preparation of sucralose.

A process for the purification of oils such as perfluoropolyether oils, silicone oils or oils based on hydrocarbons, which are contaminated with different impurities, in particular, with dispersed solid matter which can be filtered only with difficulty with conventional filters, which process comprises filtration carried out with a filter of the tangential-flow type, the pores of the filter elemen...

Utility vehicle with a limited ground clearance, with an engine (70) having a drive shaft (76) emerging vertically towards the ground, with an axle assembly (72) having a differential and with a working appliance (58) which follows the ground contour and the working tool of which is driveable from the drive shaft (76) via a belt drive extending underneath the axle assembly (72), a belt pulley (94)...

A passenger conveyor apparatus comprises a plurality of steps endlessly connected to each other and guided along a circulating conveyor path, each of the steps having a tread on which a passenger stands and a riser adjacent the forward edge of the tread, at least a portion of the riser of the steps being constituted by a light transmissive material, and a light source for throwing light on the lig...

Organosilicon cpds. of formula (R1O)n(R2O)4-n-p R3pSi, R4 [OSi(OR2)3-pR3p 2, (R1O)n(R2O)3-nSiR5Si(OR1)r(OR2)3-r or R4 [OSi (OR2)2R5Si(OR2)3 2. In the formulas, R1 is a radical selected from a gp. of CH2 = CHCH2R6-, CH2 = CHR6OR7-, CH2CHR6OC(O)R8 and CH2 = CHR9C(O)OR7-; R2 = C1-4 alkyl; R3 = monovalent hydrocarbon or fluorohydrocarbon; R4 is a radical selected from a gp. of CH2 = CHR10<, CH2 = CHR...

i) a first step for preparing treatment bath column which consists of plural unit baths; ii) a second step for exchanging the treatment liquid in each unit bath, in order and at a time dipping a material that is not to be treated into the unit bath which is not for exchanging the treatment liquid.

A semi-full cut semiconductor wafer is punt on an adhesive sheet attached to a ring frame. The wafer is pushed upward from the back surface of the sheet by a rotation breaking member in the shape of a disk whose edge portion is triangular in section. In this state, the frame is moved so that the member may not deviate from dicing lines, where the wafer is divided into a large number of chips. T...

An oral hygiene product especially for inhibiting caries is the form of toothpaste or mouthwash. The product maintains a low fluoride ion concentration in the mouth for longer periods than conventional products by the rapid precipitation of calcium fluoride either in the mouth or immediately prior to use. The product comprises a composition containing calcium ions and a further composition contain...

The invention concerns apparatus for molding thermoplastic tubing having solid annular ribs. The apparatus is of the type where a tubular mold is defined by cooperatively interengaged mold block of a pair of mold assemblies. An annular extrusion orifice for the tube extends into the mold tunnel and tubing is extruded about a mandrel. The invention provides an accumulator chamber in the region of t...

A modified latex polymer adhesive composition for use in the fabrication of flexible electronic circuitry is made by (a) preparing by emulsion polymerization an initial aqueous dispersion of an initial water-insoluble latex polymer of at least one ethylenically unsaturated monomer which comprises 0 to 2% by weight of multi-alpha, beta-ethylenically unsaturated monomer, the initial latex polymer ...

A modified latex polymer adhesive composition for use in the fabrication of flexible electronic circuitry is made by (a) preparing by emulsion polymerization an initial aqueous dispersion of an initial water-insoluble latex polymer of at least one ethylenically unsaturated monomer which comprises 0 to 2% by weight of multi-alpha, beta-ethylenically unsaturated monomer, the initial latex polymer ...

A capture facilitating device is provided for a subminiature plug connector assembly comprising a plug connector and a socket connector each having a protective collar attached perpendicularly to a mounting plate and each provided at a free end with a beveled edge. The frame of the capture facilitating device has a plurality of plate-shaped resilient support elements each attached at one end to th...

MOCVD appts. comprises a reaction chamber and a load lock chamber with an intervening transfer chamber. The load chamber may be evacuated or filled with inert gas and the transfer chamber has its own inert gas inlet and outlet. A wafer transfer mechanism is provided between load lock and reaction chambers. Wafers are placed on a susceptor connected to a lid, which is driven by the transfer mech...

Particulate catalyst which has been used in a hydrocarbon conversion process such as catalytic reforming is regenerated in a moving bed regeneration zone (12). The catalyst being regenerated is passed into the top of the zone (12) and slowly moves downward as a dense bed (14, 19, 20) which is contacted successively with an oxygen-containing gas stream (31), a temperature-adjusting gas stream (30) ...

The forming method of a passivation film (I) on a circuit and/or circuit elements (II) formed on the surface of a semiconductor chip involves patterning (I) with a resist film, which is part of (I) after being subjected to post-baking. The upper layer of (I) is made of light-sensitive polyimide, silicone resin, epoxy resin or a silicone ladder polymer. The semiconductor, upon which (I) is coated...

The present invention relates to a method by reduction of nitrogen oxides in gas mixtures, especially removing/decomposition of nitrogen oxide in hot combustion gases. The hot gas mixture which contains N2O is given a retention time of 0.1-3 seconds before being cooled down. About 90% of N2O is hereby decomposed to N2 and O2. A hot gas mixture formed by catalytic combustion of ammonia is given a r...