scholarly journals Physical properties and water absorption kinetics of three varieties of Mucuna beans

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ajibola B. Oyedeji ◽  
Olajide P. Sobukola ◽  
Ezekiel Green ◽  
Oluwafemi A. Adebo
Keyword(s):  
Physical Properties ◽  
Water Absorption ◽  
Rate Constant ◽  
Geometric Mean ◽  
Seed Mass ◽  
Activation Energies ◽  
Mucuna Pruriens ◽  
Absorption Kinetics ◽  
Kinetics Of ◽  
Soaking Temperature

AbstractThe physical properties and water absorption kinetics of three varieties of Mucuna beans (Mucuna pruriens, Mucuna rajada and Mucuna veracruz) were determined in this study. Physical properties including length, width, thickness, geometric mean diameter, sphericity, porosity, bulk density, area, volume and one thousand seed mass were calculated while hydration kinetics was studied by soaking Mucuna beans in water at 30 °C, 40 °C and 50 °C and measuring water uptake at 9 h interval. Peleg’s equation was used to model the hydration characteristics and Arrhenius equation was used to describe the effect of temperature on Peleg’s rate constant k1 and to obtain the activation energies for soaking. Significant variations were observed in almost all the physical properties of the different varieties, however, there were no significant differences (p < 0.05) in their thicknesses and bulk densities. The effectiveness of fit of Peleg’s model (R2) increased with increase in soaking temperature. Peleg’s rate constant k1 decreased with increase in soaking temperature while k2 increased with temperature increase. Activation energies of Mucuna pruriens, Mucuna rajada and Mucuna veracruz were 1613.24 kJ/mol, 747.95 kJ/mol and 2743.64 kJ/mol, respectively. This study provides useful information about the properties of three varieties of Mucuna beans that could be of importance to processors and engineers for process design and optimization.

Theoretical analysis of water absorption kinetics of recycled aggregates immersed in water

2021 ◽  
Vol 302 ◽  
pp. 124156
Author(s):  
Kun Liang ◽  
Yingjie Hou ◽  
Jianchun Sun ◽  
Xiaoguang Li ◽  
Jiahong Bai ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Water Absorption ◽  
Recycled Aggregates ◽  
Absorption Kinetics ◽  
Kinetics Of

scholarly journals Experimental Study of the Water Absorption Kinetics of the Coconut Shells (Nucifera) of Cameroun

2016 ◽  
Vol 07 (03) ◽  
pp. 159-170 ◽  
Author(s):  
Dieunedort Ndapeu ◽  
Ebénezer Njeugna ◽  
Nicodème Rodrigue Sikame ◽  
Sophie Brogly Bistac ◽  
Jean Yves Drean ◽  
...  
Keyword(s):  
Experimental Study ◽  
Water Absorption ◽  
Absorption Kinetics ◽  
Coconut Shells ◽  
Kinetics Of

scholarly journals Mathematical Modelling of Water Absorption Kinetics Using Empirical and Phenomenological Models for Millets

2019 ◽  
Vol 8 (6) ◽  
pp. 1016-1021 ◽  
Keyword(s):  
Activation Energy ◽  
Water Absorption ◽  
Pearl Millet ◽  
Rate Constant ◽  
Finger Millet ◽  
Effective Diffusivity ◽  
Process Time ◽  
Absorption Kinetics ◽  
Experimental Conditions ◽  
Sigmoidal Model

Steeping is one of the major pre-treatment which can reduce anti-nutritional factors without losing dietary fibre and polyphenols unlike in dehulling. In the current study water absorption characteristics of pearl millet and finger millet during steeping at temperature 10°C, 20°C, 30°C, 40°C and 50°C were calculated. Two empirical and one phenomenological model were used to simulate water absorption kinetics. Both the Peleg model and Omoto model were found adequately capable to predict water uptake of pearl millet and finger millet under the designed experimental conditions with regression coefficient more than 0.96. Due to comparatively high variation in grain volume during the hydration process and longer process time, sigmoidal model cannot be utilized for calculation of effective diffusivity and activation energy. Peleg’s rate constant shows an inverse relationship with steeping temperature. The activation energy was calculated by substituting effective diffusivity with reciprocal of Peleg’s rate constant in Arrhenius equation and was found 25.97 kJ/mol and 32.36 kJ/mol respectively for pearl millet and finger millet.

Moisture Dependent Selected Engineering Properties of Deenanath Seeds in Relation to Development of Processing Machinery

2021 ◽  
Vol 58 (03) ◽  
pp. 250-261
Author(s):  
Sanjay Kumar Singh ◽  
Sheshrao Kautkar ◽  
P. K. Pathak ◽  
Bholuram Gurjar ◽  
Sunil Swami ◽  
...  
Keyword(s):  
Moisture Content ◽  
Physical Properties ◽  
Geometric Mean ◽  
Seed Mass ◽  
Correlation Coefficients ◽  
Engineering Properties ◽  
True Density ◽  
Linear Relationships ◽  
Mean Diameter ◽  
Length Width

Propagation of grasses through seeds is important in view of vigour and germination. Various grasses as Pennisetum pedicellatum Trin., Cenchrus ciliaris L., Chrysopogan fulvus have lower vigour and germination, due to which they need specific operations as defluffing, separation of true seeds, cleaning and grading by specific machines. In designing a machine for a specific use, physical properties and their behaviour with moisture play an important role. A study was conducted to assess the effect of moisture content at five levels [6.88 - 19.23 %, (d.b.)] on selected physical properties of defluffed Deenanath grass seed. The length, width, thickness, arithmetic mean diameter, and geometric mean diameter of defluffed Deenanath seed increased from 2.30 mm to 2.56 mm, 0.71 mm to 0.96 mm, 0.47 mm to 0.63 mm, 1.16 mm to 1.38 mm, and 0.90 mm to 1.15 mm, respectively, with increase in moisture content 6.88 % to 19.23 %. Bulk density, true density, and porosity decreased from 652.16 kg.m-3 to 585.78 kg.m-3, 852.63 kg.m-3 to 792.71 kg.m-3, and 25.62 % to 24.97 %, respectively, with increase in moisture content from 6.88 % to 19.23 per cent. The aspect ratio, sphericity, surface area, volume, and thousand-seed mass of the seed were in the range of 30.91 - 37.51 %, 0.39 - 0.45, 2.58 - 3.23 mm2 , 3.71 - 4.97 mm3 , and 0.480 - 0.523 g, respectively. Linear relationships with correlation coefficients higher than 0.90 were observed for the physical properties over the experimental range of moisture content.

Study on water absorption kinetics of black beans during soaking

2020 ◽  
Vol 283 ◽  
pp. 110030 ◽  
Author(s):  
Peng Li ◽  
Yan Li ◽  
Li Wang ◽  
Hui Zhang ◽  
Xiguang Qi ◽  
...  
Keyword(s):  
Water Absorption ◽  
Absorption Kinetics ◽  
Black Beans ◽  
Kinetics Of

Moisture Dependent Physical Properties of Grape Seeds

2010 ◽  
Vol 6 (5) ◽  
Author(s):  
Jafar Milani ◽  
Ali Moetamedzadegan
Keyword(s):  
Moisture Content ◽  
Physical Properties ◽  
Geometric Mean ◽  
Seed Mass ◽  
Grape Seed ◽  
Angle Of Repose ◽  
Grape Seeds ◽  
Length Width ◽  
Static Coefficient Of Friction ◽  
Static Coefficient

This study was carried out to determine the effect of moisture content on some physical properties of grape seed. Seven levels of moisture content varying from 12.26 to 24.61% (w.b.) were considered in this study. Length, width, thickness, geometric mean diameter, sphericity and 1000 seed mass increased by 2.58%, 3.63%, 8.36%, 4.78%, 2.14%, and 22.62%, respectively, with the increase of moisture content. Bulk and true density increased from 469.3 to 546.3 kg/m3 and 1058.7 to 1159.3 kg/m3, respectively, while porosity decreased from 55.67 to 52.87%. The angle of repose increased from 21.79 to 29.65° with the increase of moisture content. The hardness decreased from 58.72 to 23.34 N with increase in moisture content. The static coefficient of friction of seeds was determined on concrete, galvanized iron, plywood and glass sheets at various moisture contents. The highest and lowest static coefficients of friction were observed on concrete and glass sheet, respectively.

Thermal behavior and water absorption kinetics of polylactic acid/chitosan biocomposites

2020 ◽  
Author(s):  
Nor Helya Iman Kamaludin ◽  
Hanafi Ismail ◽  
Arjulizan Rusli ◽  
Sam Sung Ting
Keyword(s):  
Thermal Behavior ◽  
Water Absorption ◽  
Polylactic Acid ◽  
Absorption Kinetics ◽  
Kinetics Of

scholarly journals Physical Properties of Seeds of Eleven Fir Species

Forests ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 142 ◽  
Author(s):  
Zdzisław Kaliniewicz ◽  
Piotr Markowski ◽  
Andrzej Anders ◽  
Krzysztof Jadwisieńczak ◽  
Zbigniew Żuk ◽  
...  
Keyword(s):  
Physical Properties ◽  
Geometric Mean ◽  
Seed Mass ◽  
Terminal Velocity ◽  
Strongly Correlated ◽  
Seed Processing ◽  
Aspect Ratios ◽  
White Fir ◽  
Sphericity Index ◽  
Sorting Process

Research Highlights: The correlations between seed mass and the remaining physical properties were determined in selected fir species, and a method for seed sorting was proposed to promote uniform germination and emergence. Background and Objectives: Information about the variation and correlations between the physical properties of seeds is essential for designing and modeling seed processing operations such as seed separation. The aim of this study was to determine the range of variation in the physical properties of seeds in eleven fir species, and to analyze the correlations between these parameters to improve the seed sorting process. Materials and Methods: Terminal velocity, thickness, width, length, the angle of external friction and mass were determined in the seeds of 11 fir species. The measured parameters were used to calculate the geometric mean diameter, three aspect ratios, sphericity index and the specific mass of each seed. Results: The seeds of Sierra white fir where most similar, whereas the seeds of balsam fir differed most considerably from the seeds of the remaining fir species. In the majority of the analyzed fir species, seed mass was most strongly correlated with terminal velocity, followed by thickness. Conclusions: Fir seeds should be sorted primarily with the use of mesh sieves with longitudinal openings to obtain fractions with similar seed mass and to eliminate the need for dewinging.

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