.bashrc is not being sourced by default in Scientific Linux, but .profile is. To use your .bashrc, used on other GWDG Resources, put this in your .profile:
case "$SHELL" in /bin/bash) . /etc/bashrc . .bashrc ;; /usr/bin/bash) . /etc/bashrc . .bashrc ;; /usr/local/bin/bash) . /etc/bashrc . .bashrc ;; *) ;; esac