摘要:
Compounds of the formula ##STR1## in which R.sup.1 represents saturated, unsaturated or anhydro desoxypentosyl, desoxyhexosyl or didesoxyhexosyl, where the OH functions of the sugar are optionally protected, andR.sup.2 represents straight-chain or branched or heterosubstituted alkyl having up to ten carbon atoms andR.sup.3 represents straight-chain or branched or heterosubstituted alkyl having up to ten carbon atoms andX represents halogens andR.sup.4 represents straight-chain or branched or heterosubstituted alkyl having up to ten carbon atoms.Such compounds are useful as highly selective cytostatics in cancer therapy.
摘要:
A backpressure grid plate is provided for a pressure filtration system of the type comprising a housing with an inlet and outlet for conducting fluid to be treated, a filter disposed in the housing between said inlet and outlet, and a backpressure grid means arranged between the filter and the inlet. The backpressure grid means comprises a plate containing minute openings which are equal in size and distributed unevenly over the surface area of the plate in such manner that the surface distribution density of the openings is lowest within an inner impact area of the plate which receives inflowing fluid to be filtered and is highest within a proximity area of the plate located immediately adjacent to and surrounding the impact area. The surface distribution density of the openings within an outer area surrounding the proximity area is lower than that of the proximity area and higher than that of the impact area.
摘要:
An N-methyl-substituted triacetonamine compound is prepared by reacting at least one triacetonamine compound (I) with formaldehyde under reductive conditions, in the presence of hydrogen and in the presence of a supported catalyst, wherein the supported catalyst contains at least one metal M, wherein the metal M is selected from the group consisting of V, Cr, Mo, Mn, Ni, Pd, Pt, Fe, Ru, Os, Co, Rh, Ir, and Cu.
摘要:
A method and a device for the playback of digitalized audio signals that are transmitted packet-oriented from a signal source to at least one signal sink, especially a loudspeaker unit, in a motor vehicle by means of an asynchronous bus system. Connected upstream of the signal sink is an audio-signal processing unit demonstrating a data rate converter, which is fed the digitalized audio signals destined for the signal sink from a control unit over a data line by means of a first data interface of the control unit. The control unit has a second data interface for the connection to the asynchronous bus system and for receiving the digitalized audio signals. A data buffer and a controller are arranged within the control unit. A first and second clocking signal provide the clock rates for the first interface and the data rate converter. These clock rates can be changed by a logic unit.
摘要:
What is described is an actuator system (2) comprising at least one actuator (29, 29′) and an associated control system (8) which is designed for at least two operating modes, at least one of which may be deactivated, whereby one of the operating modes is a high efficiency operating mode.
摘要:
A device for filling cigarette tubes with tobacco, wherein the device comprises at least one separating means adapted to detach a tobacco portion from a tobacco block and at least one portioning means adapted to portion the tobacco block, at least one transport means adapted to transport the tobacco block towards the separating means, wherein the portioning means and the transport means are coupled such that the transport means transports the tobacco block in a number of transport steps, and at least one filling means adapted to fill a cigarette tube with the detached tobacco portion. The device further comprises at least one blocking means adapted to block the transport means after each transport step until the at least one filling means has been operated.
摘要:
In a method and a device for moving a working means in the ground, a coupling means rotatable about an axis of rotation for establishing a drive connection between a push-pull unit and a rod assembly having at least one projection and/or at least one recess is engaged with the projection and/or the recess of the rod assembly such that via a first contact area of the coupling means a first feed force is transmitted from the push-pull unit to the rod assembly. By the counter force opposite to the first feed force a torque acting on the coupling means is generated, which torque presses a second contact area of the coupling means against the rod assembly with a contact force. By the contact force, a non-positive connection is established between the push-pull unit and the rod assembly. Via this non-positive connection, a second feed force is transmitted to the rod assembly. By at least a part of the first and second feed force acting on the rod assembly a linear movement of the rod assembly is caused.
摘要:
The invention relates to a device for the plasma activated vapor coating of large-surface moved substrates, comprising at least one vacuum recipient, one pump system, one evaporator, one device for holding and transporting the substrates to be coated and at least one arc discharge plasma source, whereby at least one device for generating a magnetic field is included, which device can generate a magnetic field between the evaporator and the substrate, the field lines of which magnetic field are aligned approximately perpendicular to the movement direction and parallel to the transport plane of the substrate, and at least one arc discharge plasma source is arranged such that the axis of the arc discharge plasma source is aligned approximately perpendicular to the field lines of the magnetic field.
摘要:
An amine is prepared by cleaving a carbamate of the formula I wherein R1=hydrogen, alkyl, aryl or phenyl group, R2=alkyl, aryl or phenyl group, wherein R1 and R2 are independently substituted or unsubstituted, wherein the cleaving of the carbamate is performed in the presence of an acid of the formula II wherein R3, R4 and R5 are independently alkyl or phenyl group, wherein R1, R2, R3, R4 and R5 are the same or different.
摘要:
Provided is a process for preparing a heterocycle by catalytic reaction of an aromatic dinitrile with an amino alcohol, wherein the process includes: initially charging into a reaction vessel the amino alcohol and a catalyst to produce a reaction mixture; adding the aromatic dinitrile into the reaction mixture, which is maintained at a reaction temperature, wherein no solvent other than the amino alcohol of formula (III) is added to the reaction mixture prior to and/or during the catalytic reaction; and after completion of the catalytic reaction, completely replacing, or substantially completely replacing, unreacted amino alcohol with a nonpolar solvent to obtain the heterocycle, wherein the unreacted amino alcohol is present in an amount of not more than 20 wt. %, preferably 3-10 wt. % or less, based on a total weight of the heterocycle.