ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions. ***************************************************************************** I have used vinegar to separate the protein casein from milk (I believe that it is a precipitation reaction). I have found that slowly adding about 5 ml of vinegar to about 60 ml of 2% milk at room temperature works best. Scott Scott Randol, Ph.D., Research Specialist Center for Research, Evaluation, & Assessment Lawrence Hall of Science University of California, Berkeley Berkeley, CA 94720-5200 510 225-8747 [log in to unmask] ----Original Message Follows---- From: Phillip Keck <[log in to unmask]> Reply-To: Informal Science Education Network <[log in to unmask]> To: [log in to unmask] Subject: Kitchen chemistry Date: Fri, 2 Mar 2007 10:32:03 -0600 ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions. ***************************************************************************** Hi all, Does anyone have any suggestions on any precipitation reactions that can either be carried out with grocery store chemicals, or with chemicals that are relatively safe? Thanks, Phil Museum of Science & Industry, Chicago, IL *********************************************************************** More information about the Informal Science Education Network and the Association of Science-Technology Centers may be found at http://www.astc.org. To remove your e-mail address from the ISEN-ASTC-L list, send the message SIGNOFF ISEN-ASTC-L in the BODY of a message to [log in to unmask] _________________________________________________________________ Play Flexicon: the crossword game that feeds your brain. PLAY now for FREE. http://zone.msn.com/en/flexicon/default.htm?icid=flexicon_hmtagline *********************************************************************** More information about the Informal Science Education Network and the Association of Science-Technology Centers may be found at http://www.astc.org. The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit http://www.lsoft.com/LISTSERV-powered.html. To remove your e-mail address from the ISEN-ASTC-L list, send the message SIGNOFF ISEN-ASTC-L in the BODY of a message to [log in to unmask]