Abstract: An apparatus includes a network component that is connected between at least two communication, installation and/or computer networks and is suitable and designed for allowing the passage of data traffic between the networks on the basis of adaptable and appropriately activated data traffic rules or for blocking the passage of data traffic through the network component. The network component has a communication relationship recording functionality for recording the communication relationships present during the passage of the data traffic. The recording functionality can be temporarily activated and/or deactivated for recording communication relationships, and the processing of the recorded communication relationships for the purpose of adapting and subsequently activating the data traffic rules is enabled only when the communication relationship recording functionality is deactivated. Also, a method for operating such a network component.

Abstract: A network-compatible device with a security function for destroying user data includes the a signal input configured to receive a control signal and a configuration signal; a memory configured to store first user data; and a controller configured, upon receipt of the control signal, to carry out a safety function which destroys the first user data in the memory. The network-capable device is inoperable when the first user data is destroyed, and the controller is further configured, upon receipt of the configuration signal, which includes second user data, to store the second user data in the memory to enable the network-compatible device to operate based on the second user data.

Abstract: A mode-of-operation switching method for a network component for a network, which network component has a plurality of digital signal input connections and a mode-of-operation switching functionality for switching between at least two different modes of operation of the network component. The method can be used to temporarily selectively switch from a first preconfigured mode of operation to the at least one further mode of operation of the network component by at least temporarily switching a signal onto at least one predetermined digital signal input connection. Further, an apparatus having an accordingly adapted network component.

Abstract: An access control method and a router, the router connected between at least two communication, installation or computer networks and equipped with login functionality and configured, for logging in a user, to grant the user access to predefined network zones and/or to network devices connected to the network zones following entry of login data recognized as permissible. The access method and router are characterized by an activation/deactivation device interacting with the login functionality provided on the router for temporarily activating and/or deactivating a login data input device required by the user for entering login data.

Abstract: A network-compatible device with a security function for destroying user data includes the a signal input configured to receive a control signal and a configuration signal; a memory configured to store first user data; and a controller configured, upon receipt of the control signal, to carry out a safety function which destroys the first user data in the memory. The network-capable device is inoperable when the first user data is destroyed, and the controller is further configured, upon receipt of the configuration signal, which includes second user data, to store the second user data in the memory to enable the network-compatible device to operate based on the second user data.

Abstract: A process for the preparation of alkyl (C.sub.1 -C.sub.3) nitrobenzoates by reacting the nitrobenzoic acid to be esterified with an excess of about 300 to about 600 mol % of an alkanol (C.sub.1 -C.sub.3) in a solvent which is inert towards the starting compounds and the reaction product in the presence of a polyfluoroalkanesulfonic acid of the general formula (1)Y(C.sub.n F.sub.2n)SO.sub.3 H (1)in which Y is a hydrogen or fluorine atom, with the proviso that, if Y is H, this hydrogen atom is in the .beta.-position relative to the sulfo group, or the hydrate thereof as catalyst in an amount of about 0.1 to about 20 mol %, relative to the nitrobenzoic acid used, at temperatures from about 60.degree. to about 120.degree. C.

Abstract: Compounds of the formula ##STR1## in which R.sup.1 denotes haloalkyl, haloalkenyl or haloalkynyl, (R.sup.2).sub.n denotes H or up to 3 halogens, A denotes N or N.fwdarw.0, R.sup.3 denotes H or alkyl, and Z denotes, inter alia, a carboxyl group or a functional derivative thereof, are valuable herbicides and growth regulators.

Abstract: A process for the preparation of halogen-containing aromatic compounds of the formula I ##STR1## wherein Hal represents halogen,R represents H, C.sub.1 -C.sub.3 -alkyl, phenyl, halogen or trifluoromethyl,Y represents CO or SO.sub.2 andZ represents an aromatic or heteroaromatic group, andY-Z-Y together may also be CO or SO.sub.2, which comprises reacting a haloaromatic compound of the formula RC.sub.6 H.sub.4 Hal (II) with a halide of a bisacid having the formula Hal-Y-Z-Y-Hal (III) in a molar ratio of at least 2:1 in the presence of hydrogen fluoride and or boron trifluoride, in formulae II and III Hal, R, Y and Z having the aforementioned meaning.

Abstract: The compounds of the formula (I) ##STR1## in which A denotes N or N.fwdarw.0,R denotes a radical of the formula R.sup.4 --CY.sup.1 --NR.sup.5 --CY.sup.2 --NR.sup.6 --, ##STR2## R.sup.1 denotes halogen, alkyl, alkenyl, alkynyl, alkoxy, alkoxycarbonyl or alkylcarbonyl, where these radicals may be halogenated, nitro, cyano or carboxyl, R.sup.2 denotes halogenated alkoxy, halogenated alkenyloxy or halogenated alkynloxy, R.sup.3 denotes halogen, n denotes 0, 1 or 2, m denotes 0, 1, 2 or 3, and p denotes 0 or 1, and also the salts thereof, are advantageously suitable for combating noxious insects, acarides, nematodes or mollusks.

Abstract: The compounds of the formula I ##STR1## in which A denotes N or N.fwdarw.O, Z denotes O or NH, R denotes H, (halo)alkyl, (halo)alkenyl, (halo)alkynyl or alkoxycarbonyl, R.sup.1 denotes hydrogen, halogen, amino, --NHOH, hydroxyl, (substituted) phenylazo or a radical of the formulae Y=C=N--, Y.sup.1 Y.sup.2 C.dbd.N--, Y.sup.3 NH-- or ##STR2## K denotes 0 or 1, and m and n, independently of one another, denote a number from 1 to 4, with the proviso that, when Z-R denotes OH or NH.sub.2, (R.sup.1).sub.n denotes at least one radical of the formula ##STR3## or represents two radicals, in the 5 or 6 position of the heterocyclic ring, which, in the 5 position, denote halogen and, in the 6 position, denote a radical of the group comprising halogen, amino, hydroxyl or phenylazo, which may be substituted as specified above, are valuable intermediates in the synthesis of plant protection agents.

Abstract: The invention relates to a process for the preparation of compounds of the formula I and salts or acid addition compounds thereof ##STR1## in which R denotes hydrogen, (halogenated) alkyl with the exception of CF.sub.3, a (substituted) aromatic radical, (substituted) heteroaryl, (substituted) phenoxy, (substituted) phenylthio, (substituted) phenylamino, halogen, hydroxyl, alkoxy, mercapto, (halogenated) cycloalkyl, alkylmercapto, amino, monoalkylamino or dialkylamino,R.sup.1 denotes (substituted alkyl, (substituted) phenyl or naphthyl, alkenyl, alkinyl, cycloalkyl, (substituted) benzyl or heteroaryl, and X denotes oxygen or sulfur, which comprises reacting a nitrile of the formula II with a compound of the formula IIIR--C.tbd.N (II)R.sup.