From: Dirk Kisters <d.kisters@unidui.uni-duisburg.de>
  To  : RASMB@BBRI.ORG
  Date: Fri, 11 Feb 2000 11:51:26 +0100

(Kein Betreff)

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Hi
can you send this E-mail and the attached file to ervery user in the  UZ
community.

I have attached some Schlierenpictures of a Gelatin Gel  (rotational
speed 6000 RPM , Temperature 5=B0C) at different times 1,  24, 195 and 84=
2
hours.
The initial concentration was about 12 %.
The Schlieren pictures for the same run and a initial concentration of
about 13% show also this double Schlieren line in the vicinity of the
meniscus Gel/Vapour:
Although the meniscus is not very sharp, I don=B4t think that this is not
the reason for the double Schlieren line.
Has anyone of you ever seen pictures with such kind of double Schlieren
line.
Perhaps it can be an effect, which is produced by double refraction of
the gel, but I don=B4t know.
It would be nice if you have an idea, what a kind of effect can be the
reason for these Schliern pictures.
In this case, please let me know.
Thanks a lot
With kind regards
Dirk Kisters