Abstract: The present invention relates to a device for generating cold plasma to be used in the process chemical industry, in particular for producing chemical substances, above all acids such as for example nitric acid and sulphuric acid. The invention also relates to reactors and plants involving said cold plasma generator device and to corresponding chemical processes based thereupon. The device and the associated method of the present invention allow producing with high efficiency several chemical substances, in particular acids. The invention also keeps the several advantages of using the cold plasma technology, in particular the one of not requiring catalysts and/or high reaction temperatures.

Abstract: Provided is a host cell comprising a rhlA gene or an ortholog thereof, under the control of a heterologous promoter and a rhlB gene or an ortholog thereof, under the control of a heterologous promoter. The host cell is capable of achieving a carbon yield of more than 0.18 Cmol rhamnolipid/Cmol substrate. Provided is also a method of producing rhamnolipids, employing such a host cell.