winogradski columns

Date view Thread view Subject view Author view Attachment view

From: Fred Stein (fred@exploratorium.edu)
Date: Tue Apr 22 2003 - 09:34:30 PDT 

Message-Id: <l03110701bacb1e95b16b@[192.174.2.85]>
Date: Tue, 22 Apr 2003 09:34:30 -0700
From: Fred Stein <fred@exploratorium.edu>
Subject: winogradski columns

Hi Carrie,

Try covering your column with plastic wrap and a rubber band if you haven't
already. If you notice the plastic ballooning out, vent the column when
this happens. This should cut down on evaporation.

Hope this helps,

Fred

>Subject: Re: Pinhole Digest #1191 - 04/18/03
>From: "Carrie Maslow" <cmaslow@lwhs.org>
>Date: Mon, 21 Apr 2003 16:28:35 -0700
>
>Hello,
>I have a question related to the Winogradsky columns we built this
>summer in the high school bio institute. I built one last summer but
>didn't fill it with marsh mud until school started. The colorful
>bacterial colonies (orange, green, purple, brown) are all thriving
>and competing but I'm finding that I have to water it at least once a
>month or else it's totally dry. I know it's only supposed to be
>watered once a year- any ideas of what's I did wrong? Thanks.
>Carrie Maslow

Fred Stein
Science Educator
Exploratorium Institute for Inquiry
3601 Lyon St.
San Francisco, CA 94123
(415) 561-0332
fred@exploratorium.edu

Date view Thread view Subject view Author view Attachment view

This archive was generated by hypermail 2.1.3 : Mon Aug 04 2003 - 16:18:13 PDT