The present invention relates to yeast species which are normally capable of producing sophorolipids but which are modified in such way that they are incapable producing the latter compounds. A second poly-silicon is formed on the silicon substrate. The magnetic field direction of the pinned layer is fixed, for example, by an antiferromagnetic exchange layer. The shaver is further designed with the shaver blade positioned perpendicularly to the elongated body. The intensity of light of the first and second color can be determined by comparing the measured intensity with the measured intensity when the light emission from the other LED is interrupted or changed. Further, the first conductive member and the second conductive member are connected to each other so as to form a loop.