scholarly journals Effects of storage and processing parameters on pasting properties of Ofada for production of boiled and mashed rice

2018 ◽  
Vol 36 (No. 3) ◽  
pp. 239-245
Author(s):  
Oludare Olumuyiwa Adekoyeni ◽  
Rahman Akinoso ◽  
Adekola Felix Adegoke ◽  
Stephen Akintunde Fagbemi

This study was designed to determine the effect of storage duration and processing conditions on pasting characteristics of Ofada rice and to determine the optimum pasting parameters for the production of boiled and mashed rice. The interactions of variables (storage, soaking, parboiling and drying) were studied using response surface methodology and pasting responses (final viscosity, trough, setback viscosity, breakdown, pasting temperature and pasting time) were analysed. The coefficient of R<sup>2 </sup>and adequate precision ranged between 0.994–0.7374 and 26.825–5.375, respectively, which indicate good fitness of the model. Parboiling temperature, drying temperature and storage duration significantly influenced the pasting properties of grain as revealed by positive coefficients in the model. The pasting requirements for boiled rice are storage of paddy for nine months, soaking for two days and 19 h, parboiling at 90.42°C and drying at 30°C, while for mashed rice storage of paddy for one month followed by soaking for five days, parboiling at 80°C and drying at 54.22°C are required.

Author(s):  
Emmanuel Ohene Afoakwa ◽  
Agnes Simpson Budu ◽  
Alan Bullock Merson

Bambara groundnut (Voandzei subterranea) seeds were canned with the objective of investigating the optimal pre-processing conditions that would yield the best quality canned product from it. Pre-canning procedures such as blanching time, soaking time and sodium hexametaphosphate [(NaPO3)6] salt concentration were used as the independent variables for a Central Composite Rotatable Design (CCRD). The pre-processing parameters obtained from the CCRD for k = 3 were used for the canning of the bambara groundnuts and the quality characteristics (moisture content, pH of the drained liquid, drained weight, splitting of the seeds, leached solids and seed hardness) of the canned products were studied using response surface methodology. Regression models were generated using regression analysis and used for the plotting of response surface curves. Adequacy of the model equation for predicting the optimum responses were tested in the experiment using the blanching time of 2-12 minutes, soaking time of 0-24 hours and salt concentration [(NaPO3)6] of 0-1%. Three optimal processing conditions of the canning procedures of the bambara groundnuts were determined from the mathematical models. The results revealed that the soaking time, blanching time and salt concentration all significantly (p<0.05) influenced most of the quality indices of the canned bambara groundnuts. The optimal conditions required to achieve the optimum moisture content, pH level and other quality indices studied on the canned bambara groundnuts were blanching time of 5 min, soaking time of 12 h and [(NaPO3)6] salt concentration of 0.5 %. These conditions would give the best quality canned product from bambara groundnut with acceptable quality characteristics.


LWT ◽  
2013 ◽  
Vol 50 (1) ◽  
pp. 326-330 ◽  
Author(s):  
Gap-Don Kim ◽  
Tae-Chul Jung ◽  
Eun-Young Jung ◽  
Jin-Yeon Jeong ◽  
Han-Sul Yang ◽  
...  

2020 ◽  
Vol 13 (1) ◽  
pp. 51-68
Author(s):  
O. F. Akinyele ◽  
A. V. Ikujenlola ◽  
T. O. Omobuwajo

Abstract Pupuru and pupuru analogues are fermented, smoked food products usually produced from cassava or cassava substituted with a varying ratio of breadfruit. This study aims at determining and comparing the functional and pasting characteristics of pupuru and pupuru analogues with a view to expanding the utilization of breadfruit as pupuru analogue. The functional properties (water absorption capacity (%), swelling power (g/g), solubility (%)) and pasting characteristics were determined using standard methods. The results showed that the yield of the products ranged between 24.66 and 29.65%, and it was not affected by the amount of breadfruit substituted. The water absorption capacities of the pupuru and pupuru analogues ranged between 216.0 and 449.0%; this parameter increased with temperature increase. Both swelling power and solubility had a rapid increase from 80 °C to 90 °C. Pasting temperature ranged between 73.15 and 83.66 °C, with peak time between 4.58 and 5.33 min. The final viscosity ranged between 94.08 and 391.83 RVU, and it decreased with increase in breadfruit substitution. The study concluded that adding breadfruit to cassava in pupuru analogue production improved some of the functional and pasting properties of the product.


2018 ◽  
Vol 14 (54) ◽  
pp. 235 ◽  
Author(s):  
Young-Sung Ju ◽  
Jee-Hyun Yoon ◽  
Jung-Hoon Kim ◽  
Seong-Sik Ham ◽  
Bu-Yeon Gang ◽  
...  

2009 ◽  
Vol 8 (9) ◽  
pp. 1316-1324 ◽  
Author(s):  
Khamis Ali Omar ◽  
Liang Shan ◽  
Xiaoqiang Zou ◽  
Zhihua Song ◽  
Xingguo Wang

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