Abstract: Silicon having a low carbon content is produced by removing carbon from molten silicon by heating the molten silicon to temperatures of 1420.degree. to 1900.degree. C. and establishing a temperature gradient of 30.degree. to 400+ K. in the melt.

Abstract: Method and apparatus for measuring the quality of the radio transmission channels during the transmission in progress, and for recording co-channel interferences, fast fluctuations caused by interferences are separated from slow fluctuations caused by fading, are measured and a quality indicator is derived from the test values of fast and slow fluctuations. By means of the separate measurement of the sum of the power of the receiver input noise and the power of co-channel noise sources it is possible to effect in a simple way and manner a selection of the stationary station having the best receiving condition.

Abstract: The invention relates to a process for the production of polyarylene sulphides with functional end groups.

Abstract: This invention relates to a process for the production of polyarylene sulphides with functional end groups.

Abstract: A process for the production of columnarly grown blocks of silicon containing coarsely crystalline regions comprising cooling a silicon melt in a mold, selectively effecting solidification at the melt surface and advancing the solidification front downwardly. The blocks can be sawed into chips, useful for solar cells.

Abstract: The invention relates to a process for the production of optionally branched polyarylene sulfides by reacting dihalogen benzenes in admixture with aromatic polyhalogen compounds and alkali sulfides in polar solvents, the reaction being carried out in the presence of reducing agents.

Abstract: This invention relates to a new process for the production of optionally branched polyarylene sulphides from optionally substituted halogen benzenes in admixture with aromatic polyhalogen compounds and alkali metal sulphides in polar solvents, with the addition of reducing agents and other polyhalogenated compounds.

Abstract: A tubeless pneumatic tire having a pair of beads characterized in that the area of the bead beneath the bead core comprises a layer of cellular elastomeric material.

Abstract: Sulfonylurea derivatives of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are as hereinafter set forth, ARE DESCRIBED. The sulfonylurea derivatives are useful as hypoglycemic agents.

Abstract: 3-Cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2) and compositions containing the same, are useful for controlling the growth of undesirable pest plant growth, e.g., algae, weeds and undesirable grasses, when applied to the locus to be protected.

Abstract: Process for obtaining 5,6 or 6,7 or 7,8 dihydroxy coumarin or derivatives thereof, which are useful for lower blood pressure and for chemical sympathectomy by oxidizing 2,3 or 3,4 or 4,5 dihydroxyphenyl-propionic acid or derivatives thereof, and novel coumarin derivatives of the process.