PHYSICOCHEMICAL PROPERTIES OF STARCH FROM AVOCADO SEED (PERSEA AMERICANA MILL)

Q4 Agricultural and Biological Sciences Boletim Centro de Pesquisa de Processamento de Alimentos Pub Date : 2017-06-09 DOI:10.5380/CEP.V34I2.53138

D. M. Santos, D. Ascheri, A. L. Bukzem, C. Morais, C. Carvalho, J. Ascheri

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引用次数: 14

Abstract

The extraction and characterization of avocado starch isolated from seeds ( Persea americana Mill) were studied. The starch was extracted by steeping, wet grinding and sedimentation process and calculated its yield. Isolated starch was then characterized for chemical composition, morphology and granules size distribution, X-ray diffraction an mid-infrared spectra, swelling powder and solubility, pasting and thermal properties and clarity and syneresis behavior. The starch yield was 42.2%. The results showed starch granules were predominantly ellipsoidal with an average granule size of 17.83 μm. Exhibited B-type X-ray diffraction pattern with 25.7% of crystallinity, and apparent amylose content of 21.5% with similar mid-infrared spectra to other starches. Onset and peak gelatinization temperatures were 67.6 and 76.0 °C, respectively, and gelatinization enthalpy was 14.9 J/g. Starch suspensions showed p eak viscosity at 4421 cP and high retrogradation tendency, which was evidenced by opaque gels and syneresis.

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鳄梨种子淀粉的理化性质

研究了牛油果种子淀粉的提取及特性。采用浸渍、湿磨、沉降等工艺提取淀粉，并计算其得率。然后对分离淀粉的化学成分、形貌和粒度分布、x射线衍射和中红外光谱、溶胀粉和溶解度、糊化和热性能、透明度和协同作用行为进行了表征。淀粉得率为42.2%。结果表明:淀粉颗粒以椭球型为主，平均粒径为17.83 μm;表现为b型x射线衍射图，结晶度为25.7%，表观直链淀粉含量为21.5%，中红外光谱与其他淀粉相似。胶凝起始温度为67.6℃，胶凝峰温度为76.0℃，胶凝焓为14.9 J/g。淀粉悬浮液粘度峰值为4421 cP，具有较高的降解倾向，表现为凝胶不透明和协同作用。

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Boletim Centro de Pesquisa de Processamento de Alimentos Agricultural and Biological Sciences-Animal Science and Zoology

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期刊介绍： The CEPPA Bulletin publishes unpublished technical-scientific papers (unpublished or submitted to another journal), resulting from research and bibliographic reviews in the area of science, technology, food engineering and the like. Originals in English (priority) are accepted, which comply with the normative provisions of the newspaper. The opinions expressed in articles are the sole responsibility of the authors. The Bulletin reserves the right to adapt the originals to maintain the homogeneity of the publication, always respecting the author''s style. The CEPPA Bulletin is indexed in Scopus, Food Science and Technology Abstract (FSTA), CAB Abstract, Chemical Abstract (CA), Latin American and Caribbean Literature in Health Sciences (LILACS) databases and Periodical Literature in Agricultural Sciences (PERI).