The invention relates to a method for reductive amination of polysaccharides which comprises subjecting a reaction mixture comprising a polysaccharide, an amino compound and a reducing agent, to microwave radiation for a period of time sufficient to aminate the polysaccharide. The carrier material being unwound from a feeding roll, the one tape ply with its adhesive coating being laminated against the other tape ply with a lateral projection on at least one side. The low noise amplifier LNA is constituted of transistors, an inductor, capacitors, and resistors.