Abstract: The present application relates to the use of 3-(2,4,6-trimethylphenyl)-4-neopentylcarbonyloxy-5,5-tetramethylene-?3-dihydrofuran-2-one for controlling insects from the family Cecidomyiidae.

Abstract: The invention provides apparatus for exposing a face of a panel, in particular a printed circuit panel, the device including a light source. The device further comprising: two moving shutters suitable for masking said light source, each of said shutters presenting a respective edge, said edges together defining a window through which a light zone is generated on said face of the panel to be exposed; means for displacing said shutters in a plane lying between said light source and said panel; and control means for controlling the displacement of said shutters in such a manner that both shutters move past said face of the panel at substantially the same speed and in the same direction.

Abstract: The invention provides apparatus for exposing a face of a panel, in particular a printed circuit panel, the device including a light source.

Abstract: A process for the production of calcium borate from boric acid; boric acid, obtained from any source, is reacted with a calcium compound, preferably calcium hydroxide, in an aqueous medium to obtain a suspension of solid calcium borate which is then separated from the residual liquor. Preferably the boric acid is prepared from minerals containing borate salts, in particular, colemanite and howlite; wherein said minerals are ground, reacted with sulfuric acid in an aqueous medium, at high temperature, to obtain a pulp of solids, including mainly gypsum and clay, in a liquor; said solids are eliminated from the liquor and boric acid is crystallized.