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1. What causes it to be hollow?

1. What causes it to be hollow?. 2. What causes this kind of growth? My guess is that it is the same thing that causes the crystals to be hollow (see picture 1). The crystal is growing faster than the molecules of protein can be supplied to the growing surface. 3. Two types of dendritic growth.

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1. What causes it to be hollow?

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  1. 1. What causes it to be hollow?

  2. 2. What causes this kind of growth? My guess is that it is the same thing that causes the crystals to be hollow (see picture 1). The crystal is growing faster than the molecules of protein can be supplied to the growing surface.

  3. 3. Two types of dendritic growth • There are two types of dendritic growth: 1. sea urchins growing from spherulites and 2. fractal dendritic growth. Spherulites are due to too high supersaturation. Fractal dendritic growth is due to impurities. (But impurities of what? macroheterogeneity, small molecules, or microheterogeneity?)

  4. 4. These are what I would call spherulites. Do you make a distinction between spherulites and the ”sea urchins” (see picture 5)? I believe that all ”sea urchins” start off as spherulites, and so there is no need to make a distinction between the two. Do you agree?

  5. 5. In this picture I would call these sea urchins. The probably started off as spherulites, but have needles growing out of them

  6. 6. Is this fractal dendritic growth? OBS! This is Enrico Stura’s picture (from the cover of the ICCBM5 conference). I call these ” the Christmas trees”.

  7. 7. Fractal dendritic growth?

  8. 8. This is an example of Ostwald ripening. I would say the crystal, especially on the right, is growing faster than the protein molecules can be supplied to the growing face. This is why the crystal has so many ridges and imperfections on the surface. Is this an example of what happens when transport is by convection rather than diffusion? Or would you say there are impurities causing this?

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