Abstract: The invention relates to biodegradable polymeric composite material for the production of micro-capsules containing any kind of substances, e.g. foodstuffs, medicine and immunogens or technical materials such as oils, colorants, enzymes or similar.

Abstract: A method for converting data formats which differ from one another during exchange of messages or data between programs running on different processors of a communication system provides that a conversion procedure is generated per each data type during the translation event of the source programs and that the conversion procedure which controls the conversion of the data formats is called during the later running of the processes and programs immediately before a message exchange.

Abstract: At a channel bank, such as a D-type channel bank used in the Bell System, a steady visual alarm is exhibited if the source of a detected failure is at a location either within the channel bank or in the digital hierarchy of a digital transmission network. Unfortunately, a craftsperson is unable to distinguish between the two failure locations. To distinguish between the locations, apparatus for indicating the failure location to be in the hierarchy is situated between the hierarchy and the channel bank and, responsive to an alarm failure signal from the hierarchy, extends a predetermined cyclic code signal to the channel bank. Without modification of the channel bank and responsive to the code signal, a cyclic visual alarm in lieu of the prior art steady alarm is provided thereat.

Abstract: Process for the preparation of resorcinol monoalkyl ethers by dehydrogenizing 3-alkoxycyclohexene-(2)-ones in the liquid or gaseous phase.

Abstract: Cyclohexane-1,3-diones of the formula ##STR1## having up to 24 carbon atoms are prepared in admixture with 6-alkyl-3,4-dihydro-2-pyranones of the formula ##STR2## having up to 24 carbon atoms, in which formulae the radicals R and R' may be identical or different and represent each a hydrogen atom, an alkyl, a cycloalkyl or an aryl group each having up to 12 carbon atoms and the two radicals R' together optionally represent a --(CH.sub.2).sub.3 -group, by passing 4-oxocarboxylic acids of the formula ##STR3## having up to 24 carbon atoms and in which R and R' have the above meaning at a temperature of from 250.degree. to 500.degree. C in the gaseous phase over a dehydration catalyst and the pyranones are converted into cyclohexane-1,3-diones by passing them in the gaseous phase over a dehydration catalyst at a temperature of from 250.degree. to 500.degree. C.

Abstract: Cyclohexanediones-1,3 are prepared in a good selectivity by reacting an .alpha.,.beta.-unsaturate carboxylic acid ester with a ketone in the liquid phase in the presence of a strong base and a solvent selected from the group consisting of carboxylic acid amides, phosphoric acid amides, sulfoxides, sulfones, and glycol dialkyl ethers.

Abstract: The present invention is related to a process for the manufacture of hydroquinone by catalytic dehydrogenation of cyclohexanedione-(1,4) in the liquid phase by means of a dehydrogenation mixture composed of a solvent and a catalyst comprising a noble metal of Group VIII of the periodical system.

Abstract: Process for preparing resorcinols from .delta.-ketocarboxylic acids or their lactones in the gaseous phase at temperatures from 150.degree.14 500.degree. C by means of a dehydrogenation catalyst.