Abstract
Drying kinetics and effects of drying on nutritional properties of 5 varieties of aonla were investigated using cabinet dryer. Thin shreds of aonla were spread in a layer in dryer and dried at varying temperature of 40, 50 and 60 °C till constant weight attained. Thin layer Newton model was proposed to study drying kinetic of aonla varieties. Degradation in TPC (total phenolic content) and ascorbic acid content were studied at varying temperature. Total phenolic and ascorbic acid content were retained maximum at 50 °C and higher values of R2 and the lowest value of root mean square error (RMSE), Chi square and mean biased error (MBE) for all varieties indicated that Newton model appropriately described the drying curve of aonla. Among the varieties, variety Banarasi had maximum value of R2 (0.993) and the lowest values for RMSE (0.039), Chi square (0.018) and MBE (0.001) at 50 °C. Reduction was observed in ascorbic acid, reducing sugar, polyphenol content and pectin content of aonla varieties during drying process. From study, it was observed that drying of aonla at 50 °C was best in terms of higher retention of TPC and ascorbic acid and Newton model was found suitable to explain drying pattern within temperature range under study.
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Alfaro S, Mutis A, Quiroz A, Seguel I, Scheuermann E (2014) Effects of drying techniques on murtilla fruit polyphenols and antioxidant activity. J Food Res 3(5):73–82
AOAC (2005) Official methods of analysis, 18th edn. Association of Official Analytical Chemists, Washington
Chukwuma P, Ozoma RT (2006) Tropical plant perishables, handling, storage and processing of food commodity series. Silicon Valley Publishers, Enugu 2, pp 93–94
Damodaran S, Parkin KL, Fennema OR (2007) Fennema’s food chemistry, 4th edn. CRC Press, Boca Raton
Demir V, Gunhan T, Yagcioglu AK, Degirmencioglu A (2004) Mathematical modeling and the determination of some quality parameters of air-dried bay leaves. Biosys Eng 88:325–335
Di Scala KC, Crapiste GH (2008) Drying kinetics and quality changes during drying of red pepper. LWT- Food Sci Technol 41(5):789–795
Dini I, Tenore GC, Dini A (2008) Chemical composition, nutritional value and antioxidant properties of Allium caepa L. Var. tropeana (red onion) seeds. Food Chem 107:613–621
Famurewa JAV, Olumofin KM (2015) Drying kinetic and influence on the chemical characteristics of dehydrated okra (Abelmoschusesculentues) using cabinet dryer. Eur J Eng Technol 3(2):7–19
Goodenough PW, Atkin PK (1981) Quality in stored and processed vegetables and fruits. Academic Press, London
Guine RPF, Ferreira DMS, Barroca MJ, Gonc-alves FM (2007) Study of the drying kinetics of solar-dried pears. Biosyst Eng 98:422–429
Hashim N, Daniel O, Rahaman E (2014) A preliminary study: kinetic model of drying process of Pumpkins (Cucurbita moschata) in a convective hot air drying. Agric Agric Sci Proc 2:345–352
Hodge JE, Hofreiter BT (1962) Determination of reducing sugars and carbohydrates. In: Methods in carbohydrate chemistry, vol 1. Academic Press, London, pp 380–394
López J, Uribe E, Vega-Gálvez A, Miranda M, Vergara J, Gonzalez E, Di Scala K (2010) Effect of air temperature on drying kinetics, vitamin C, antioxidant activity, total phenolic content, non-enzymatic browning and firmness of blueberries variety O´Neil. Food Bioprocess Technol 3:772–777
Methakhup S, Chiewchan N, Devahastin S (2005) Effect of drying methods and conditions on drying kinetics and quality of Indian gooseberry flake. LWT-Food Sci Technol 38:579–587
Mishra P, Srivastava V, Verma D, Chauhan OP, Rai GK (2009) Physico-chemical properties of Chakiya variety of Amla (Emblica officinalis) and effect of different dehydration methods on quality of powder. Afr J Food Sci 3:303–306
Mujumdar AS (1987) Handbook of industrial drying. Marcel Dekker, New York
Murthy ZVP, Joshi D (2007) Fluidized bed drying of Aonla (Emblica officinalis). Drying Technol 25:883–889
Nag S, Dash KK (2016) Mathematical modeling of thin layer drying kinetics and moisture diffusivity study of elephant apple. Int Food Res J 23:2594–2600
Pareek S, Kaushik RA (2012) Effect of drying methods on quality of Indian gooseberry (Emblica officinalis Gaertn.) powder during storage. J Sci Res 71:727–732
Parveen K, Khatkar BS (2015) Physico-chemical properties and nutritional composition of aonla (Emblica officinalis) varieties. Int Food Res J 22:2358–2363
Patter HE (1985) Evaluation of quality of fruits and vegetables. AVI Publishing Co Inc., Westport
Popa C, Petrus M (2017) Heavy metals impact at plants using photoacoustic spectroscopy technology with tunable CO2 laser in the quantification of gaseous molecules. Microchem J 134:390–399. https://doi.org/10.1016/j.microc.2017.07.006
Popa C, Dumitras DC, Patachia M, Banita S (2014) Testing fruits quality by photoacoustic spectroscopy assay. Laser Phys. https://doi.org/10.1088/1054-660X/24/10/105702
Pragati DS, Dhawan SS (2003) Effect of drying methods on nutritional composition of dehydrated aonla fruit (Emblica officinalis Gaertn.) during storage. Plant Food Hum Nutr 58:1–9
Prajapti VK, Nema PK, Rathore SS (2011) Effect of pretreatment and drying methods on quality of value-added dried aonla (Emblica officinalis Gaertn) shreds. J Food Sci Tech 48(1):45–52
Ranganna (1986) Hand book of analysis and quality control for fruit and vegetable products. Tata McGraw-Hill Publishing Co., Pvt. Ltd., New Delhi, pp 40–43
Sethi V (1986) Effect of blanching on drying of aonla. Indian Food Packer 40(4):7–10
Singh BP, Pandey G, Sarolia DK, Pandey MK, Pathak RK (2005) Shelf-life evaluation of aonla cultivars. Indian J Hort 62:137–140
Singh PL, Ganesan S, Singh S (2006a) Drying study of amla (Emblica officinalis Gaertn.) in a solar tunnel dryer. Indian Food Packer 60:47–51
Singh R, Dashora LK, Upadhyay B (2006b) Effect of pre-drying treatments and drying methods on physico-nutritional quality of dehydrated aonla shreds. Indian Food Packer 60:57–63
Turner I, Mujumdar AS (1996) Mathematical modeling and numerical techniques in drying technology. Marcel Dekker, New York
Vadivambal R, Jayas DS (2007) Changes in quality of microwave-treated agricultural products—a review. Biosyst Eng 98:1–16
Verma RC, Gupta A (2004) Effect of pre-treatments on quality of solar-dried amla. J Food Eng 65:397–402
Yemm EW, Willis AJ (1954) The estimation of carbohydrates in plant extracts by anthrone. Biochem J 57(3):508–514
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Kumari, P., Khatkar, B.S. Nutritional composition and drying kinetics of aonla fruits. J Food Sci Technol 55, 3135–3143 (2018). https://doi.org/10.1007/s13197-018-3241-8
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DOI: https://doi.org/10.1007/s13197-018-3241-8