Apparatus (10) and methods for measuring dark and bright reflectances of translucent sheet material (2) are disclosed. The apparatus (10) comprises first optical means for illuminating one side of the sheet material (2) with a source of electromagnetic radiation. A portion of the radiation is transmitted through the sheet material (2) and another portion of the radiation is reflected by the sheet ...

Such apparatus may consist of relatively simple elements as it comprises two clamping members (8, 9) which are connected to each of two trawl wires (2'). The one clamping member (8) is secured to prevent displacement in the longitudinal direction of the wires and a rigid connection member (10) is located between and pivotally attached to the clamping members (8, 9). The rigid connection member is ...

The invention relates to a new method of preparing lactulose by basic isomerisation of lactose. According to the invention the reaction mixture is treated with hydrogen peroxide or sodium chlorite to obtain lactulose of an acceptable colour for a pharmaceutical product. Preferably 0.5 - 5 g of hydrogen peroxide are used per kg of lactose. 1H2O.

A heating element (30) is inserted into the archwire slot (2) of the tooth (5) in order to allow the adhesive surface (6) of a dental bracket (1) to become loose. Force is exerted by a pull wire (42), controlled by a force limiting spring (24), until the bracket is removed. No harm comes to the patient or the tooth.

In a communication system having at least a central arrangement and a plurality of mutually independent subscriber stations, a subscriber station, after transmitting a request for access, expects an authorization for access to be granted by the central arrangement. For this purpose it is proposed that the subscriber station repects its request for access once it has established that a further subs...

In a communication system having at least a central arrangement and a plurality of mutually independent subscriber stations, a subscriber station, after transmitting a request for access, expects an authorization for access to be granted by the central arrangement. For this purpose it is proposed that the subscriber station repects its request for access once it has established that a further subs...

In a joint arrangement between two profiled panels 2, 3 which have lower portions 4 and elongate elevations, the joint extends essentially parallel to the longitudinal direction of the elevations. The two panels have, at their edges situated towards the joint, elevations 5A, 5B and, protruding upwards from these, in the joint which is designed as a lap joint, lap members 7, 8. Also forming part of...

Dry powdered material is slurried with a liq. in a container with the help of a stirrer unit. The powdered material includes gravel shaped contaminants. The powdered material is added under the surface near the stirrer. The bottom of the container slopes downwards towards the outlet for the contaminants. Pref. the dry material is limestone and the liq. is water.

Two adjacent horizontal first (1) and second (2) frame parts are joined to each other by two vertical third (3) and fourth (4) frame parts. All four parts are rotatably joined to each other in order to form an assemblable and collapsible sign board system. The distance between two rotary axes (20,21) for the first (1) frame part is the same as that between two such axes (22,23) for the second (2) ...

Active substance preparations characterised by a) up to 10000 ppm, based on the weight of the preparation, of one or more coccidiostats of the general formulae I and II in which R<1>, R and R' are, independently of one another, hydrogen or C1-C4-alkyl, R<2> is together with R<3> a double bond or independently thereof hydrogen or C1-C4-alkyl, R<3> is together with R<2> a double bond or ind...