Abstract
The effect of toasting (mild heat treatment) and cooking (severe heat treatment) on color and antioxidant properties of flours from pearl millet cultivars grown in India were investigated. The antioxidant properties studied were total phenolic content (TPC), total flavonoids content (TFC), antioxidant activity (AOA), metal chelating activity (MCA), and ABTS+ scavenging activity. Toasting resulted in increase in antioxidant properties (TPC, TFC, AOA, MCA, and ABTS+) as well as hunter a* and b* values. The hunter L* value was, however, decreased. Except for increase in hunter L* value and MCA all other antioxidant properties of flours studied showed a decrease after cooking as compared to flours from their native counterparts. Comparison of both the processing methods revealed that except for MCA, all other antioxidant properties of flours after toasting had significantly (p < 0.05) higher values than after cooking.
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.References
F.S. Pushparaja, A. Urooj, Antioxidant activity in two pearl millet (Pennisetum typhoideum) cultivars as influenced by processing. Antioxidants 3, 55–66 (2014)
R. K. Salar, S. S. Purewal, M. S. Bhatti, Optimization of extraction conditions and enhancement of phenolic content and antioxidant activity of pearl millet fermented with Aspergillus awamori MTCC-548. Resour-Efficient Technol. 2, 148–157 (2016)
D. Peressini, A. Sensidoni, Effect of soluble dietary fibre on rheological and bread making properties of wheat dough’s. J. Cereal Sci. 49, 190–201 (2009)
P.S. Hegde, T.S. Chandra, ESR spectroscopic study reveals higher free radical quenching potential in kodo millet (Paspalum scrobiculatum) compared to other millets. Food Chem. 92, 177–182 (2005)
E.E. Towo, U. Svanberg, G.D. Ndossi, Effect of grain pre-treatment on different extractable phenolic groups in cereals and legumes commonly consumed in Tanzania. J. Sci. Food. Agric. 83, 980–986 (2003)
H. Zielinski, A. Michalska, M.K. Piskula, H. Kozlowska, Antioxidants in thermally treated buckwheat groats. Mol. Nutr. Food Res. 50, 824–832 (2006)
C. Fares, V. Menga, Effects of toasting on the carbohydrate profile and antioxidant properties of chickpea (Cicer arietinum L.) flour added to durum wheat pasta. Food Chem. 131, 1140–1148 (2012)
M. Kaur, N. Singh, Relationships between various functional, thermal and pasting properties of flours from different Indian black gram (Phaseolus mungo L.) cultivars. J. Sci. Food. Agric. 87, 974–984 (2007)
W. Brand-Williams, M.E. Cuvelier, C. Berset, Use of a free radical method to evaluate antioxidant activity. LWT-Food Sci. Technol. 28, 25–30 (1995)
L. Gao, S. Wang, B.D. Oomah, G. Mazza, Wheat quality: antioxidant activity of wheat millstreams, in wheat quality elucidation, ed. by P. Ng, C.W. Wrigley (AACC International, St Paul, 2002), pp. 219–233
Z. Jia, M. Tang, J. Wu, The determination of flavonoids content in mulberry and their scavenging effects on superoxides radicals. Food Chem. 64, 555–559 (1999)
T.C. Dinis, V.M. Madeira, L.M. Almeidam, Action of phenolic derivates (acetoaminophen, salycilate, and 5-aminosalycilate) as inhibitors of membrane lipid peroxidation and peroxyl radicals scavengers. Arch. Biochem. Biophy. 315, 161–169 (1994)
R. Re, N. Pellegrini, A. Proteggente, A. Pannala, M. Yang, C. Rice-Evans, Antioxidant activity applying an improved ABTS radical cation decolorization assay. Free Radic. Bio. Med. 26, 1231–1237 (1999)
K.S. Sandhu, P. Godara, M. Kaur, S. Punia, Effect of toasting on physical, functional and antioxidant properties of flour from oat (Avena sativa L.) cultivars. J. Saudi Soc. Agric. Sci. (2015). doi:10.1016/j.jssas.2015.06.004
D.N. Yadav, J. Kaur, T. Anand, A.K. Singh, Storage stability and pasting properties of hydrothermally treated pearl millet flour. Int. J. Food Sci. Technol. 47, 2532–2537 (2012)
A.K. Siroha, K.S. Sandhu, M. Kaur, Physicochemical, functional and antioxidant properties of flour from pearl millet varieties grown in India. Food Meas. 10, 311–318 (2016)
J. Boateng, M. Verghese, L.T. Walker, S. Ogutu, Effect of processing on antioxidant contents in selected dry beans (Phaseolus vulgaris L.). LWT-Food Sci. Technol. 41, 1541–1547 (2008)
P. Wanyo, N. Meeso, S. Siriamornpun, Effects of different treatments on the antioxidant properties and phenolic compounds of rice bran and rice husk. Food Chem. 157, 457–463 (2014)
A. Chandrasekara, M. Naczk, F. Shahidi, Effect of processing on the antioxidant activity of millet grains. Food Chem. 133, 1–9 (2012)
S. Siah, J.A. Wood, S. Agboola, I. Konczak, C.L. Blanchard, Effects of soaking, boiling and autoclaving on the phenolic contents and antioxidant activities of faba beans (Vicia faba L.) differing in seed coat colours. Food Chem. 142, 461–468 (2014)
L.M. Cardoso, T.A. Montini, S.S. Pinheiro, V.A. Queiroz, H.M. Pinheiro-Sant Ana, H.S. Martino, A.V. Moreira, Effect of processing with dry heat and wet heat on the antioxidant profile of sorghum. Food Chem. 152, 210–217 (2014)
A.-M. Afify, H.S. El-Beltagi, S.M. El-Salam, A. A. Omran, Biochemical changes in phenols, flavonoids, tannins, vitamin E, β-carotene and antioxidant activity during soaking of three white sorghum varieties. Asian Pac. J. Trop. Biomed. 2, 203–209 (2012)
P. Sharma, H.S. Gujral, B. Singh, Antioxidant activity of barley as affected by extrusion cooking. Food Chem. 131, 1406–1413 (2012)
S.R. Pradeep, M. Guha, Effect of processing methods on the nutraceutical and antioxidant properties of little millet (Panicum sumatrense) extracts. Food Chem. 126, 1643–1647 (2011)
P. Sharma, H.S. Gujral, Effect of sand roasting and microwave cooking on antioxidant activity of barley. Food Res. Int. 44, 235–240 (2011)
M. Zhang, H. Chen, J. Li, Y. Pei, Y. Liang, Antioxidant properties of tartary buckwheat extracts as affected by different thermal processing. LWT-Food Sci. Technol. 43, 181–185 (2010)
F. Zhu, Y. Cai, J. Bao, H. Corke, Effect of γ-irradiation on phenolic compounds in rice grain. Food Chem. 120, 74–77 (2010)
W.W. Nawar, Lipids, in Food Chemistry, ed. by O.R. Fennema, 3rd edn. (Marcel Dekker, New York, 1996), pp. 225–319
H.M. Woffenden, J.M. Ames, S. Chandra, M. Anese, C. Nicoli, Effect of kilning on the antioxidant and pro-oxidant activities on pale malt. J. Agr. Food Chem. 50, 4925–4933 (2002)
R. Randhir, Y. Kwon, K. Shetty, Effect of thermal processing on phenolics, antioxidant activity and health-relevant functionality of select grain sprouts and seedling. Innov. Food Sci. Emerg. Technol. 9, 355–364 (2008)
S. Sakanaka, Y. Tachibana, Y. Okada, Preparation and antioxidant properties of extracts of Japanese persimmon leaf tea (kakinoha-cha). Food Chem. 89, 569–575 (2005)
V. Dewanto, X. Wu, R.H. Liu, Processed sweet corn has higher antioxidant activity. J. Agric. Food Chem. 50, 4959–4964 (2002)
B. Xu, S.K. Chang, Total phenolics, phenolic acids, isoflavones, and anthocyanins and antioxidant properties of yellow and black soybeans as affected by thermal processing. J. Agr. Food Chem. 56, 7165–7175 (2008)
A.M. Chuah, Y. Lee, T. Yamaguchi, H. Takamura, l. Yin, T. Matoba, Effect of cooking on the antioxidant properties of coloured peppers. Food Chem. 111, 20–28 (2008)
R. K. Salar, S. S. Purewal, Phenolic content, antioxidant potential and DNA damage protection of pearl millet (Pennisetum glaucum) cultivars of north Indian region. Food Meas. Charact. (2016). doi:10.1007/s11694-016-9379-z
P. Sharma, H. S. Gujral, Antioxidant potential of wheat flour chapattis as affected by incorporating barley flour. LWT-Food Sci. Technol. 56, 118–123 (2014)
H.S. Gujral, M. Angurala, P. Sharma, J. Singh, Phenolic content and antioxidant activity of germinated and cooked pulses. Int. J. Food Prop. 14, 1366–1374 (2012)
Acknowledgements
The financial support provided by Chaudhary Devi Lal University, Sirsa in the form of University Research Scholarship to Anil Kumar Siroha is deeply acknowledged.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors also declare no conflict of interest.
Rights and permissions
About this article
Cite this article
Siroha, A.K., Sandhu, K.S. Effect of heat processing on the antioxidant properties of pearl millet (Pennisetum glaucum L.) cultivars. Food Measure 11, 872–878 (2017). https://doi.org/10.1007/s11694-016-9458-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11694-016-9458-1