X-ray diffraction pattern and relative crystallinity of irradiated arrowroot starch
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2017
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Resumo
After cereals, tubers and roots are the major source of starch for food and industrial uses. Arrowroot refers to
any plant of the genus Marantha, but the term is most commonly used to describe the easily digested starch
obtained from the rhizomes of Marantha arundinacae. The rhizomes of this herbaceous plant contain about 20%
of starch. As few studies exist on arrowroot starch, the objective of this preliminary work was to study the X-ray
diffraction patterns (XRD) patterns of arrowroot starch when treated by γ-radiation with doses up to 15 kGy in a
60Co source. The XRD patterns of the arrowroot starch exhibited A-type crystalline arrangements with strong
peaks at approximately 15º, 17º, 18º and 23º (2θ). A slight increase of diffractogram peaks intensity was noticed
after the irradiation process. The cristallinity index was calculated using Bruker DIFFRAC.EVA version 4.2
software. Relative crystallinity seems to increase with radiation doses, and this effect is more noticeable at low
doses. That can be attributed to different radiation sensitivity among the amorphous and crystalline regions of
the arrowroot starch molecule. Present results will contribute to elucidate the behavior under radiation treatment
of this starchy component increasingly employed by the food industry.
Como referenciar
BARROSO, ALINE G.; GARCIA, RAFAEL H.L.; DEL MASTRO, NELIDA L. X-ray diffraction pattern and relative crystallinity of irradiated arrowroot starch. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28330. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.