A new "spiral-in-to-spiral-out" mixed-mode type chaos of the Belousov-Zhabo
tinsky (BZ) reaction in a continuous flow stirred tank reactor (CSTR) is ob
served. We discussed its evolution and characterization in detail. We contr
olled the new chaos into steady periodic behavior by two control methods: (
i) a self-adaptive delayed feedback controlling scheme; and (ii) a linear s
elf-interacting feedback controlling scheme.