Abstract: A fan slide-in unit, module or chassis of the type used for cooling electronic assemblies. The fan slide-in unit constructed in modular manner having a plurality of fan installation locations arranged in rows and which comprises two half-shells made from substantially acoustically inert material. The number and location of the individual fans can comply with the needs of the particular individual, the installation locations left free being made air-impermeable. The ready electrical connection possibility provided for each installation location permits an easy changeover. In addition, the mounting of the individual fans in the half-shells takes place in solid-borne sound-decoupled manner, so that essentially there is only the noise caused by the air flow. The fans used are controlled in unitary manner by a manually adjustable control block, which can be guided in a temperature or parameter-dependent manner.

Abstract: This invention relates to a tool with at least one wear-resistant hard metal part which serves to process production pieces, stones, or the like, wherein the hard metal part is firmly connected with a metallic carrier by solder located in at least one solder aperture. In order to reduce the danger of formation of tension cracks in the hard metal part, the invention provides that at least one predetermined weak point is created in the solder aperture.

Abstract: This invention relates to a tool with at least one wear-resistant hard metal part which serves to process production pieces, stones, or the like, wherein the hard metal part is firmly connected with a metallic carrier by solder located in at least one solder aperture. In order to reduce the danger of formation of tension cracks in the hard metal part, the invention provides that at least one predetermined weak point is created in the solder aperture.

Abstract: The invention relates to new compositions which contain 0.5 to 90% by weight of a phthalazine derivative having the general formula (I), ##STR1## wherein R.sub.1 stands for hydrogen, halogen, a straight-chained or branched C.sub.1-4 alkyl group having optionally a chlorine or hydroxy substituent, a C.sub.2-4 alkenyl group, or an optionally alkyl-substituted amino, sulfhydryl or hydroxy group, andB.sub.1 and B.sub.2, which may be identical or different, have no meaning or stand for guanidine and/or hydrazine base,and/or an imidazole derivative of the general formula (II), ##STR2## wherein n is equal to zero or 4,R.sub.2 stands for hydrogen, a straight-chained or branched C.sub.1-5 alkyl group having optionally a chlorine or hydroxy substituent, or a C.sub.2-5 alkenyl group,X stands for an organic or inorganic anion, andin the compounds of the general formula (II) wherein n is equal to 4 R.sub.

Abstract: In the fining of a protein-containing beverage such as a fruit juice or a grape or fruit wine or a must therefor in unfermented, partially fermented or fermented form, wherein silica sol is added to said beverage, and the deposit formed is separated off, the improvement which comprises adding an aluminate-modified silica sol to said beverage, whereby the protein removing and flocculation occurs more readily than with unmodified silica sol. The aluminate is preferably added in the form of sodium aluminate. Optionally gelatin is also added.