The invention relates to compounds and catalytic reactions to the production of 1,1-disubstituted alkenes or joining the two alkenes at their 2-position, starting from 2 equivalents of the aromatic alkenes (homodimerization) or two different alkenes (heterodimerization) over the production of typica.....
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A filter comprises at least one filtration unit with a filtration passage having an inlet and an outlet, wherein the filtration unit includes at least one groove formed in an inlet side surface of the filtration unit, said at least one groove extending to the inlet and dimensioned to hold back subst.....
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In conventional metallic waveguides, the transverse dimension of the waveguide determines the cut-off frequency for the transmission of electromagnetic (EM) waves. This means the larger the transverse dimension of the waveguide, the longer the wavelength of the guided waves. Hence, it may not be pra.....
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