Abstract: Mutants of lactic acid bacteria including Lactococcus lactis which are defective in pyruvate formate-lyase production and/or in their lactate dehydrogenase (Ldh) production and methods of isolating such mutants or variants are provided. The mutants are useful in the production of food products or in the manufacturing of compounds such as diacetyl, acetoin and acetaldehyde and as components of food starter cultures.

Abstract: Mutants of lactic acid bacteria including Lactococcus lactis which are defective in pyruvate formate-lyase production and/or in their lactate dehydrogenase (Ldh) production and methods of isolating such mutants or variants are provided. The mutants are useful in the production of food products or in the manufacturing of compounds such as diacetyl, acetoin and acetaldehyde and as components of food starter cultures. In particular, Lactococcus lactis DN223 deposited under the accession No. DSM 11036.

Abstract: Old railroad beds need to be regraded in order to permit for an increased axle load. There are often cables or tubes embedded in the roadbed at the roadbed sides, which makes the regrading difficult. At intervals along the bed, one removes material by suction to form pits at each side of the track, and, with a laser camera, one both reads the profile adjacent the pits and the positions of the embedded cables/tubes and saves this information, and then, by using the saved information, one controls a device for mechanically excavating material from the roadbed sides without damaging the embedded cables/tubes and grades the railroad bed. A laser measuring device (11-15) for reading the roadbed profile is described.

Abstract: A device in connection with a hand-operated working machine with a water flow directed to the working tool comprises a first control which is a control (15) for a drive motor (3) for the tool, and a second control which is a control (17) for the water supply to the tool. A water control valve (45) in a water supply conduit (14) can be adjusted to adopt chosen opening positions, and is arranged constantly to be kept open in any chosen opening position when the motor is running the tool under influence of the drive motor control. The chosen opening positions are adjustable, i.e. the through opening of the valve can be increased or decreased by using water supply control (17).

Abstract: Genetically modified lactic acid bacteria having a reduced or lacking or enhanced diacetyl reductase activity, acetoin reductase activity and/or butanediol dehydrogenase activity are provided. Such bacteria are used in starter cultures in the production of food products including dairy products where it is desired to have a high content of diacetyl and for reducing or completely removing diacetyl in beverages including beers, fruit juices and certain types of wine, where the presence of diacetyl is undesired.

Abstract: A device in connection with a cutting machine with an annular saw blade and with a driving mechanism for off-center drive of the blade. The device includes two first rollers arranged to contact and roll against the web of the saw blade on one side of the blade and two second rollers arranged to contact and roll against the web of the blade on the other, opposite side of the blade. The first rollers are mounted on a first shaft, which is movable along a path against the plane of the saw blade, perpendicularly to the centerline of the shaft, for pressing the first rollers with a certain desired force against the blade web under counter force by the second rollers on the opposite side of the blade.

Abstract: A drive wheel for off-center drive of an annular saw blade in a cutting machine, consists of at least two components, which are separable but held together during operation, namely a holding disc and a drive ring, the latter having an encircling drive groove for the inner edge of the saw blade, the drive ring being arranged radially outside a central portion of the holder disc.

Abstract: A hand-operated cutting machine comprising a rotatable saw blade (3), a machine body with drive machinery for rotation of the saw blade, a rear manoeuvring handle (20) with control (17, 18) for a drive motor (2) included in said drive machinery and a front handle bow (25) which has the form of a crow which stretches from one side of the machine body over the machine body or over the saw blade to the other side of the machine body. The handle bow is rotatably attached to the machine body in a hinge (26) with an axis of rotation (24) which is located behind the saw blade and is perpendicular to the plane of the saw blade, that both ends of the handle bow are connected to each other through said hinge, and that the handle bow is fixingly adjustable in different rotational positions.

Abstract: Methods of isolating nonsense suppressor-encoding lactic acid bacteria, cultures and compositions of lactic acid bacteria and plasmids comprising a gene coding for a nonsense suppressor, and a method of confining extrachromosomal replicons capable of replicating in lactic acid bacteria to lactic acid bacteria.

Abstract: A method of isolating a lactic acid bacterial DNA fragment comprising a promoter, the method comprising introducing a DNA molecule comprising a transposable element comprising a promoterless structural gene as a promoter probe gene into a population of a lactic acid bacterium, methods of constructing a recombinant lactic acid bacterium comprising a regulatable promoter by using the above method, a recombinant lactic acid bacterium comprising a gene coding for a desired gene product and operably linked thereto a regulatable lactic acid bacterial promoter not natively associated with the gene, the use of such a recombinant lactic acid bacterium and recombinant plasmids comprising a regulatable lactic acid bacterial promoter.

Abstract: Useful mutants of lactic acid bacteria or plasmids capable of replicating in lactic acid bacteria, comprising nonsense mutation suppressor-encoding genes, the use of such suppressor genes for confining a replicon to a specific lactic acid bacterium or to a lactic acid bacterium growing in a particular environment and for controlling the number of lactic acid bacterial cells in a particular environment.

Abstract: The invention relates to a hydraulic motor having a motor body comprising a first and a second part (71, 72) which are joined to each other in a parting plane (74). A motor chamber (2) with driving cogwheels (10, 11) is formed by borings (84, 85), which extend from the parting plane into a certain depth in at least one of the first and second parts (71, 72). A by-pass conduit (15) is provided between the inlet and outlet hydraulic conduits of the motor chamber. In the by-pass conduit there is provided a main valve (20) for closing and opening the by-pass conduit for starting and for stopping the hydraulic motor, respectively. The by-pass conduit is formed by portions (16, 17) of a first (100) and a second (101) connection between the parting plane (74) and the inlet conduit (5), and between the parting plane (74) and the outlet conduit (7), respectively, and by a cross link (18) between the first and second connections (100, 101).

Abstract: A plunge valve for closing and for opening a connection in a hydraulic conduit comprises a plunge (37) which is slidably movable in the hydraulic conduit (5, 5A) under the influence of the pressure in a section (5A) of the conduit on the inlet side of said conduit adjacent to the plunge between a first, open position, when the pressure in said section (5A) is high, in which position the plunge is withdrawn and communication is established, and a second, closed position, in which the pressure in said section is low, in which position the plunge shuts off said connection.