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 Title: 
Grain Growth in Protoplanetary Disks - From Infrared to Millimetre Wavelengths
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 Authors:
          Th. Henning, MPIA

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 Abstract:
        
We will summarize evidence for grain growth in protoplanetary disks, based on infrared spectroscopy from ISO and Spitzer and 7mm VLA observations of T Tauri stars. With the VLA we could resolve the disks and found clear evidence for millimetre- sized grains. These new results will be discussed in the framework of recent disks models.

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