摘要:
The invention relates to biocatalytic methods for preparing enantiomerically pure stereoisomers of 1-(2,6-dichloro-3-fluorophenyl)ethanol. Disclosed are methods of preparation of the desired (S)-enantiomer, which methods are based on a combination of enzymatic resolution, chemical esterification and chemical hydrolysis with inversion of 1-(2,6-dichloro-3-fluorophenyl)ethyl esters or stereoselective bio-reduction of 2,6-dichloro-3-fluoro-acetophenone with a biocatalyst such as an enzyme or a microorganism. The chiral (S)-enantiomer can be used in the synthesis of certain enantiomerically enriched, ether linked 2-aminopyridine compounds that potently inhibit auto-phosphorylation of human heptocyte growth factor receptor.
摘要:
A street curb cleaning system for facilitating collecting trash from a street curb includes a tractor. A housing encloses a chamber space and includes a bottom wall, a back wall, a side wall, and a top wall. The bottom wall, the side wall, and the top wall form a front edge of the housing, wherein the front edge defines an opening into the chamber space. A mount attaches the housing to the tractor. A bottom wedge extends outwardly from a bottom section of the front edge. The bottom wedge separates trash from the street surface when the tractor moves the bottom wedge forward adjacently to the street surface. A side wedge extends outwardly from a side section of the front edge. The side wedge separates trash from a curb surface when the tractor moves the curb surface forward adjacently to the curb surface.
摘要:
Winder for an endless lane of a plastic web (2), with a revolving unit (6, 6′, 55, 90), which is constructed so as to be rotatable about its axis (16) and has at least two winding shafts (10 to 12, 10′ to 12′) running parallel to its axis, onto which winding cores (17) can be loaded, then wound with the web (2) to a roll (18), finally unloaded therefrom again as finished rolls (18), wherein on both sides of the revolving unit (6, 6′, 50, 90) support arrangements are arranged, in which the winding shafts (10 to 12, 10′ to 12′) are supported at their corresponding ends therein, and wherein the support for one end of the winding shafts (10 to 12, 10′ to 12′) is constructed so as to be detachable, such that the respective winding shaft (10 to 12, 10′ to 12′), with released support, can be loaded and unloaded from this end, characterized in that the detachably constructed support arrangements each have a gripper arrangement (36 to 38) with a two-armed scissor unit (39 to 41), the scissor arms (42, 43) of which surround the winding shaft (10 to 12, 10′ to 12′) in the closed position and are pivoted away therefrom in the open position.
摘要:
A method for delivering ballast to a section of railroad track includes measuring an existing ballast profile of a section of railroad track using a remote sensing system, and providing a signal indicative thereof to a first computer. Using the first computer, the existing ballast profile is compared with an ideal ballast profile to compute a track file representing a volume of additional ballast needed as a function of linear position along the section of railroad track, and data representing the track file is transmitted to a second computer of an automatic ballast dump train. Ballast is dumped along the section of railroad track according to the track file under control of the second computer.
摘要:
A robot is used to pick parts from a bin. The robot has a compliant apparatus and one or more tools are connected to the apparatus to perform the picking. The compliant apparatus has mechanisms for monitoring and/or controlling its compliance. The compliant apparatus can have various embodiments. Force sensing can be used during removal of grasped parts from the bin to determine the force exerted on the picking tool(s). The signal indicative of the exerted force can be used by the robot controller to determine the weight of the parts that may be held by the picking tool(s). The robot has one or more devices which can be the picking tool to stir the parts in the bin.
摘要:
The invention relates to a winding shaft for winding a continuous flexible material web into a roll. The winding shaft has means in order to adjust the diameter of the winding shaft surface to be wound between a reduced-diameter unused position and an expanded operating position, and the winding surface in the expanded position is formed jointlessly with a uniform curvature and is supported inward against the operational pressure around said winding surface in a dimensionally stable manner that is substantially uniform. A roll can thereby be wound without disruptions and then stored without a casing until the roll “dies”, said roll remaining stable during storage and not forming any disrupted zones on the inner face of the roll.
摘要:
A lighted handgrip assembly has a hand grip housing with the lighting system mounted therein, in order to indicate the location thereof. The handgrip housing includes an inner metal tube and outer plastic tube, which are supported in end caps, one end cap secured to each end of the tube.
摘要:
The present invention relates to methods of preparing a stereoisomerically enriched compound of formula (I), wherein R6 is hydrogen, comprising treating a compound of formula (I), wherein R6 is chosen from C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, —(CR7R8)t(C6-C14 aryl), and —(CR7R8)t(4-10 membered heterocyclic), and wherein said C6-C14 aryl and 4-10 membered heterocyclic are optionally substituted with at least one substituent chosen from halo, C1-C10 alkyl, —OR7, and —N(R7R8), with a biocatalyst in an aqueous solution, an organic solvent, or a mixture of organic and aqueous solvents wherein at least one stereoisomer is selectively hydrolyzed.