“…The residual material of starch granules treated extensively (e.g., 3 months with 16% H2SO4) is called "Nageli arrtylodextrin" French 1971, Robin et al 1974). Extensive studies on " Nageli amylodextrin" (watanabe and French 1980, Umeki and Kainuma 1978, 1981, Kikumoto and French 1983) showed that a pair of a-(l-»4)-linked glucose chains are more stable to acid treatment than single chains and also supported the idea of the double helix model for the crystalline portion of starch.…”