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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 536914
Title Preparation of antinutrients-reduced dhokla using response surface process optimisation
Author(s) Sharma, Anand; Kumari, Sarita; Nout, Martinus J.R.; Sarkar, Prabir K.
Source Journal of Food Science and Technology-Mysore 55 (2018)6. - ISSN 0022-1155 - p. 2048 - 2058.
Department(s) Food Microbiology
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Antinutrient - Bengalgram - Dhokla - Process optimisation - Response surface methodology - Rice
Abstract Dhokla, a popular indigenous savoury dish of India, is prepared by soaking bengalgram dal and rice, grinding separately, mixing the batters, and spontaneously fermenting and steaming of mixed batter. Central composite rotatable response surface designs for soaking, fermentation and steaming at five-level combinations were used for optimising preparation of dhokla to achieve reduced contents of antinutrients. Optimum soaking of bengalgram dal (dal–water ratio of 1:5 w/w, pH 7.0, 23 °C, 20 h) and rice (rice–water ratio of 1:5 w/w, pH 5.6, 16 °C, 18 h) resulted in reduced levels of all the antinutrients, except total biogenic amines in rice. Fermentation of dal–rice (3:1 v/v) mixed batter under optimum condition (added NaCl of 8 g/kg, 32 °C, 18 h) further reduced their levels, but total biogenic amines content was enhanced. However, optimum steaming of dal–rice mixed fermented batter for 20 min was effective in reducing all the tested antinutrients. In dhokla, the content of tannins, phytic acid and total biogenic amines reduced by 100, 94 and 20%, respectively; trypsin inhibitor and haemagglutinating activities reduced by 92 and 100%, respectively, over raw ingredients. The optimally prepared product (dhokla) ranked “excellent” in terms of overall sensory quality.
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