The present invention comprises a process for the asymmetric synthesis of florfenicol, thiamphenicol or chloramphenicol, from a derivative of trans-cinnamic acid, comprising the steps: (a) converting the acid to an acid chloride using a chlorinating agent, and reducing the acid chloride to a trans allylic alcohol with a reducing agent; (b) asymmetrically epoxidizing the allylic alcohol of step (a)...

A unit for controlling valves being actuated by electromagnets for a pressure fluid includes a housing having a housing frame and a lid defining an interior. At least one valve coil and components of the at least one valve coil, such as a wound coil body and a yoke ring, are disposed in the housing. The at least one valve coil is spaced from the housing frame defining interstices therebetween, and...

The opener has a receptacle (1) in which the shell is held by an inclined edge (4). The upper edge (2) of the receptacle has holes and the bent end (7) of a lever (6) is held in one of these. Its position is varied according to the size of the shell fish. Two sides (2,3) of the receptacle are closed by a bar (5) across the corner and this holds the shell. A triangular blade (8) is fixed to the lev...

La coquille 2 d'un moule, ou toute autre pièce de celui-ci, comporte un perçage s'étendant à partir de la surface 20 au travers de ladite coquille 2 jusqu'à l'extérieur dudit moule. Le perçage est obturé par un évent 1 ayant une face d'extrémité entièrement étanche affleurant à ladite surface 20 pour constituer une partie 19 de la surface de moulage, ledit évent 1 occupant exactement la totalit...

A rugby ball (1) is adapted for "passing" practice by providing a ring (21) extending through aperture (20) in the casing and an elasticated cord having two runs (23, 24) looped through swivel (22) connected with the ring (21). The free ends of cords (23, 24) terminate in wrist cuffs (30). Ring (21) lies, in part, trapped between the ball bladder and casing with interposed reinforcement being prov...

The invention under proposal is a system for feeding aggregate to hammer mills producing sand or other granular material in general, its function being to provide a regulated acceleration of the immission of raw material for processing and the elimination of contact between the hammers and the material to be crushed during those unfavourable moments which give rise to the build-up of unprocessed m...

A container (10) having a neck (14) with a non-tapered cylindrical upper drain portion, and a frictional interference fit collar (20) for a withdrawal member (45) is disclosed which results in tight interference fit. Also total effective withdrawal of the contents of the container is promoted by providing a ring like stop or seat (21) at the bottom of the neck. The construction also will accommoda...

Polyol compositions comprising a polyol, an insoluble fluorinated compound and a surfactant composition which is the reaction product of a stoichiometric excess of a polyisocyanate and a polyalkylene glycol monoalkyl ether of formula R-A-OH, wherein R is C1-25 alkyl and A is a polypropylenoxy chain, optionally containing up to 25 % polyethylenoxy units, having a total length of from 4 to 39 units.

Apparatus for determining the position of a mobile vehicle relative to a fixed location marker device (10,20) which comprises a coil (22) energized to emit a magnetic field composed of lines of magnetic flux extending radially and arcuately from the ends of the coil's longitudinal axis (12). A sensor unit mounted on the mobile vehicle comprises four identical sensing coils (A,B,C,D,) each responsi...

A medical probe device for contacting tissue within the body includes a catheter tube (6) having a control end and a probe end (16). The probe end (16) includes a housing (24) having a port (28). An element (40) is located within the housing and is movable between a first and second position. The element has a distal tip (34) adapted to penetrate tissue during movement. The element (40) comprises ...

Improved fiber resin matrix prepreg fabrics are disclosed which are comprised of a first layer of reinforcing fabric coated with an epoxy resin composition and a discrete second layer of an epoxy resin modified with an elastomeric polymer. The discrete second layer is provided with a support comprising a gauze-like, lightweight fibrous mat or carrier of light-weight fibers that preserves the secon...

Compsn. for sizing glass fibres comprising (A) an emulsion or suspension based on at least one polyarylenethioether modified by at least one acid, anhydride, epoxy, hydroxy or amine cpd. or function and (B) at least one coupling agent.;

La présente invention concerne des fils de verre revêtus d'une composition d'ensimage pour fils de verre, comprenant (A) une émulsion ou suspension à base d'au ...

Process for prodn. of expandable (co)polymers of styrene comprise (co)polymerising styrene and opt. \- one comonomer in aq. suspension in the presence of a polymerisation initiator and \- one mercaptan as chain transfer agent, the mercaptan(s) being added to the polymerisation medium before or at the latest at the moment of commencement of the polymerisation in an amt. of \> 0.01 and <= 0.1 (0.0...

The prodn. of expandable (co)polymers of styrene comprises (co)polymerising styrene and opt. at least one comonomer in aq. suspension in the presence of a polymerisation initiator and at least one mercaptan as chain transfer agent, the mercaptan(s) being added to the polymerisation medium in an amt. of 0.005-3 pts. wt. per 100 pts. wt. styrene and any comonomers when the level of conversion of the...

Prodn. of expandable (co)polymers of styrene comprises (co)polymerising styrene and opt. at least one comonomer in aq. suspension in the presence of a polymerisation initiator and at least one mercaptan as chain transfer agent, the mercaptan(s) being added continuously to the polymerisation medium in an amt. of 0.005-3, pref. 0.01-0.5 pts. wt. per 100 pts. wt. styrene and any comonomers, during al...

The prodn. of expandable (co)polymers of styrene comprises (co)polymerising styrene and opt. at least one comonomer in aq. suspension in the presence of a polymerisation initiator with continuous addn. of the blowing agent(s) to the polymerisation medium in an amt. of 1-12 pts. wt. per 100 pts. wt. styrene and any comonomers, during the whole or part of the period of the (co)polymerisation during ...

The invention relates to polymer compositions, pelletised polymer product, polymer conversion processes and products produced therefrom. In particular the invention relates to polymer compositions having improved melt-processability, particularly in extrusion-type polymer conversion processes such as film extrusion as described in our co-pending application GB 9419946.0. This application relates t...

A currency counting and discrimination device (10) for receiving a stack of currency bills, rapidly counting and discriminating the bills in the stack (20), and then re-stacking the bills. The device comprises an input receptacle (209) for receiving a stack of currency bills to be discriminated, a discriminating unit (30) for discriminating the denomination of the currency bills, and one or more o...

Disclosed are foamable EPDM compositions comprising EPDM, a carbon black having a CTAB of about 50 to 60 m2/g and DBP of 90 to 115 cc/100 g and a blowing agent which are advantageous for use in applications where UHF microwave curing is utilized and for replacing foamable EPDM compositions incorporating similar amounts of conventional blends of carbon blacks. Also disclosed are foamed, cured EPDM ...

Porous materials suitable for a variety of uses including waterproof/breathable fabrics, air filters, liquid filters, liquid/liquid separation membranes, vascular grafts, mechanical seals, etc. which comprises an intimate combination of about 50 to 99.9 wt % polyetrafluoroethylene polymer and about 0.1 to 50 wt % of a fluorinated organic polymer which is liquid under ambient conditions, such as th...