Compounds of formula (1) wherein R represents a sugar residue or an acylated derivative thereof; R<1> represents a methyl, ethyl or isopropyl group; Y<1> is -CH2, Y<2> is -CH- and X represents [wherein R<2> represents a hydrogen atom or a group OR<6> (where OR<6> is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms) and R<3> represents a hydrogen atom, o...

Compounds of formula (1) and salts thereof, wherein R<1> represents a methyl, ethyl or isopropyl group; Y<1> is -CH2-, Y<2> is -CH- and X represents where R<2> represents a hydrogen atom or a group OR<8> (where OR<8> is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms) and R<3> represents a hydrogen atom, or R<2> and R<3> together with the carbon atom ...

Compounds of formula (1) wherein R<1> represents a methyl, ethyl or isopropyl group; Y<1> is -CH2-, Y<2> is -CH- and X represents [where R<2> represents a hydrogen atom or a group OR<6> (where OR<6> is a hydroxy group or a substituted hydroxyl group having up to 25 carbon atoms) and R<3> represents a hydrogen atom, or R<2> and R<3> together with the carbon atom to which they are at...

The invention relates to a process for the treatment of ceramic fibres based on silicon, nitrogen and/or carbon, characterised in that it consists in bringing the said fibres into contact with hydrofluoric acid.

The invention relates to a process for the treatment of ceramic fibres based on silicon, nitrogen and/or carbon, characterised in that it consists in bringing the said fibres into contact with hydrofluoric acid.

A limited slip differential for driving two coaxial shafts (2, 4) comprises a driving gear carrier (6) in which first and second worm members (10C) and (10A) are rotatably mounted on pins (11) parallel to the shafts (2) and (4). The worms (10A and 10C) are extended to form respective helical pinions (24C) and (24A) meshing respectively with helical sun gears (18) and (20) on the shafts (2) and (4)...

A fermentation process and a fermenter in which aeration is improved by injecting substantially pure oxygen into a culture medium by means including a venturi (14) located outside the main body of the fermenter. Preferably the oxygen is injected at the throat of the venturi. The invention is particularly suitable for the fermentation of viscous cultures, e.g. cultures of filamentous fungi.

A surface plasmon resonance (SPR) detector in which radiation from a laser source 13 is reflected off a concave reflector 18 to a point or line 19 of incidence on the interface between a glass slide 11 and a metal layer. The single pencil beam 14 from the laser 13 is scanned by a moving mirror 15 across a small arc, covering those angles of incidence within which surface plasmon resonance occurs. ...

Hearing improvement device (10), auditory prosthesis, hearing aid, fitting device (12) for these apparatus (10) and method of fitting or determining new auditory characteristic by selecting and applying a vector consisting of relative changes to a plurality of individual ones of a set of acoustic parameters (22) which determine the auditory characteristic of such apparatus. The method involves sel...

In order to unroll a strip (3) of material automatically, irrespective as to how the roll (6,7) is orientated in relation to the work direction of the unroller (11), the movement path of a strip coming from the unrolling equipment is monitored, and when no strip is forthcoming, the drive direction of the equipment is altered.

The gap between the vehicle window (1) external surface and the lower edge of the window aperture is blocked by means of a fillet fixed with an outwardly directed flange.

Data items D (e.g. bytes or words) are transferred over a bus (10) in bit-parallel form between a sending device (12) and a receiving device (14). For enabling error correction, each data item is transferred not only in its original form (D), but also in inverted form ( &upbar& D) and in bit permuted (cyclically shifted) form (D*). On the receiving side, the received original data (A) are kept wit...