Comparative Study of the New Colorimetric VITEK 2 Yeast Identification Card versus the Older Fluorometric Card and of CHROMagar Candida as a Source Medium with the New Card

The new VITEK 2 colorimetric card was compared to the previous fluorometric card for identification of yeast. API 20C was considered the “gold standard.” The new card consistently performed better than the older card. Isolates from CHROMagar Candida plates were identified equally as well as those from Sabouraud dextrose agar

Interdiffusion in Ge rich SiGe/Ge multilayers studied by in situ diffraction

We report on the investigation of diffusion properties of SiGe/Ge multiple quantum well (MQW) structures with period of 24 nm grown strain symmetrized on relaxed SiGe buffers on Si (001) substrates by molecular beam epitaxy. During in situ annealing, X-ray diffraction experiments were performed on series of MQW structures with average Ge contents of about 70 and 90% using reciprocal space mapping around the (224) reciprocal lattice point. The reciprocal space maps were obtained at elevated temperatures at the ESRF for temperatures from about 600 to 800 degrees C. The temperatures, where interdiffusion becomes observable, is in the range from 680 to 780 degrees C for x(Ge) = 0.7 and from 650 to 720 degrees C for x(Ge) = 0.9. The diffusion parameters were obtained from the analysis of the decay of the periodic satellites in the recorded intensity maps. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinhei