In this combustion engine with two-stage register supercharging, excess exhaust gas from an exhaust collector (2) in the engine (1) is utilised in a turbine (7) which can transmit its output to the output shaft (9) of the engine (1) via a clutch (8). One of the two exhaust turbochargers (3; 4; 28) is also fed at either full or restricted rate from the exhaust gas collector (2) depending on the par...

A process is described for preparing a compound (I) (wherein R<1> represents a methyl, ethyl or isopropyl group and OR<2> represents a hydroxy, methoxy or acetyloxy group) which comprises reducing a compound (II) (wherein R<1> is as defined above, R<3> is a hydrogen atom, a methyl group or a protecting group and Hal represents a halogen atom. The intermediates (II) are new compounds.

A process is described for preparing a compound of formula (I) (in which R<1> represents a methyl, ethyl or isopropyl group, R<2> represents a hydrogen atom or a methyl or acetyl group and R<3> represents a hydrogen atom, or OR<2> and R<3> together with the carbon atom to which they are attached represent the group >C=0) which comprises treating a corresponding 23 alpha - compound with a tr...

A process for preparing a compound of formula (I) (in which R<1> represents methyl, ethyl or isopropyl group, R<2> represents a hydrogen atom or a methyl or acetyl group and R<3> represents a hydrogen atom, or OR<2> and R<3> together with the carbon atom to which they are attached represent the group >C=0) which comprises oxidising a corresponding 23 alpha -OH compound in the presence of a ...

Compounds of formula (I) and salts thereof, wherein R<1> represents a methyl, ethyl or isopropyl group; R<2> represents a C2-7 alkyl group interrupted by an oxygen or sulphur atom or an aryl, aryl C1-7 alkyl or heteroaryl C1-7 alkyl group; OR<3> is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms; and the group =NOR<2> is in the E configuration. These compounds ...

Compounds of formula (I) and salts thereof, wherein R is a C1-4 alkyl group, R<1> is a methyl, ethyl or isopropyl group; and OR<2> is a hydroxyl or substituted hydroxyl group having up to 25 carbon atoms. These compounds may be used for controlling insect, acarine, nematode or other pests.

Compounds of formula (I) wherein R represents a hydrogen atom or a silyl group; R<1> represents a methyl, ethyl or isopropyl group; Y<1> is -CH2-, Y<2> is -CH- and X represents -C(R<2>)(R<3>)-[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 ...

A process for preparing the compound of formula (I) which comprises treating the corresponding 23 alpha - compound sequentially with (i) oxalyl chloride and (ii) 2-mercaptopyridine-N-oxide, a catalytic amount of an organic base, and a thiol.

A process for preparing a compound of formula (I) (where (i) R<1> is an ethoxy group and R<2> is a hydrogen atom, (ii) R<1> is a hydrogen atom and R<2> is a bromine atom or (iii) (R<1> and R<2> together with the carbon atom to which they are attached represent >C=O) which comprises stereoselectively reducing the corresponding 5-keto compound.

Water-soluble thickened acid compositions suitable for matrix or fracture acidizing are provided comprising water, an acid, and an acid thickening amount of a copolymer of sodium 2-acrylamido-2-methylpropane sulfonate and acrylamide produced by irradiation. These compositions are useful without a crosslinking agent. They are also suitable for mud acidizing.

There is disclosed a traffic control system for vehicles and/or people, that employs a fixed station (5, 6) and a programmable element (3, 4) carred by the vehicle 3C. The vehicle 3C is provided with an infra-red transmitter-receiver pair, co-operating with a microprocessor associated with a non-volatile memory. The memory is adapted to contain data relating to the system parameters and/or data re...

In an electrically heated hose in which heat energy is produced by an electric current flowing through resistors arranged between longitudinally-running electrodes, it is provided that the electrodes (1) are embedded in the jacket of the hose and a homogeneous conductive layer (2) is arranged between them, and that this layer essentially forms the hose wall.

Stable, clear, antimicrobially effective, ophthalmic formulations include an ophthalmologically effective amount of a drug, especially a -COOH group-containing drug or a NSAID, and a preservative system formed of a quaternary ammonium preservative and a nonionic surfactant, all in an aqueous vehicle. These formulations are useful for treating diseases that are either caused by, associated with or ...

Stable, clear, antimicrobially effective, ophthalmic formulations include an ophthalmologically effective amount of a drug, especially a -COOH group-containing drug or a NSAID, and a preservative system formed of a quaternary ammonium preservative and a nonionic surfactant, all in an aqueous vehicle. These formulations are useful for treating diseases that are either caused by, associated with or ...

The mask (1) fits around the head of the user with the aid of straps (7, 9). A sprung component is inserted between the two layers of the mask to permit it to bend backwards or forwards. This enables the mask to be used for either the left or right eye, in that it can be turned inside out, with the mask bent in the opposite direction.

The invention relates to a method and device for feeding liquid-state weed-killer to a weed skimmer which is preferably mounted on a machine. To ensure that environmentally friendly small amounts of liquid are fed out, the feed according to the method is effected intermittently. The device includes an interval reversing switch 5, which controls the flow of weed-killer from a store 3 to the weed sk...

The invention relates to an arrangement of largely known technical component functions which, through systematized application and coordination, form a goods-handling unit which, arranged on an automatic mobile chassis and, in comparison with conventional forklift trucks, involves substantially shorter goods-handling time and lower energy consumption and which contains a facility for connecting a ...

A pipe connection device for a scientific equipment in which a reduced diameter head having slits is formed at a front end part of a clamp covering a packing fitted to an outer circumference of the open end part of the pipe. A part of the packing is positioned within the reduced diameter head. The reduced diameter head, at its extremity end, forms an inclined cylinder part fitted to an inner incli...

The method involves delivering a flow of flavouring substance to the tobacco rod with the aid of a feed arrangement. The method also involves controlling the flow of flavouring substance periodically between a flow of maximum value and a flow of minimum value, and applying the maximum flow to those parts (36) of the tobacco rod which each include the tip-end of a cigarette. - The method then compr...