Open AccessEffect of Particle Size on Physico-Chemical and Antioxidant Activity of Insoluble Dietary Fiber Powder from Corncob (Zea mays L.)
Author(s) -
Edi Suryanto,
Mercy Taroreh
Publication year - 2022
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2022.22541
Subject(s) - corncob , chemistry , particle size , antioxidant , fiber , fourier transform infrared spectroscopy , food science , dietary fiber , nuclear chemistry , chromatography , organic chemistry , chemical engineering , raw material , engineering
Effects of particles size of dietary fiber powder on the physico-chemical properties and antioxidantactivity of corncob were investigated. Corncob was grounded in a regularly mill and grindingcharacteristics and the particles size were evaluated by particle size analyzer (PSA) using laser diffractionmethod and Fourier transform infrared (FTIR). The results showed that the insoluble dietary fiber(IDF) powder from corncob had the highest crude fiber content (32.31%) and carbohydrates (55.07%).Spectral analysis shows that the IDF matrix structure does not change after grinding and has threecharacteristics of absorption spectra at 3433-3425 cm-1 (O-H); 2920 cm-1 (C-H) and 1635 cm-1 (aromatic)in presence of the special structures of polysaccharide and lignin compounds. Particle size analyzer(PSA) results showed that the size of IDF 200 mesh and 80 mesh powder were 63.13 and 260.89 μm,respectively. The insoluble dietary fiber (IDF) significantly shows a decrease in dietary fiber contentin line with the reduction in particle size. The IDF powder with a particle size of 63.13 μm showed thathighest total phenolic content accompanied with the best antioxidant activity through all antioxidantassays (p < 0.05). This study concluded that the IDF micro-powder particle size exerted influence onphysico-chemical properties, dietary fiber, total phenolic and antioxidant activity.