Selected Physical Properties of Peanuts

In this study, several physical properties of unsplit pistachio nut were determined as functions of moisture content. By increasing moisture content from 5 to 20% all geometric characteristics increased linearly. Also, apparent and bulk density increased from 803 to 872 kg/m3 and from 458 to 575 kg/m3, respectively, while porosity decreased from 43% to 34%. Coefficient of static friction of the sample nuts on galvanized iron, plywood, and rubber surfaces increased linearly with moisture content. Nut splitting force decreased from 142 to 21 N and energy increased from 20 to 52 mJ with increasing moisture content from 5 to 20%.

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“…Similar trends have been reported for apricot pit, split pistachio nut, sunflower seed and peanut samples. [9,13,16,19,20] …”

Section: Static Coefficient Of Frictionmentioning

confidence: 99%

Selected Geometric Characteristics, Density, and Mechanical Properties of Unsplit Pistachio Nut

Maghsoudi

Khoshtaghaza

Minaei

2010

International Journal of Food Properties

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“…Aspect ratio for ebony seed (68.24 %) was lower than for morama, Bambara groundnut, chickpea and jack bean, but higher than for African breadfruit seeds (Table 2). Seed or grain specific mass is a vital parameter in product storage, transport, handling and processing (Alcali et al 2006). Average TSW for ebony seed was 0.70 Kg, of which the kernel accounted for 0.42 Kg, that is, 60.06 % of seed weight.…”

Section: Linear Dimensions and Geometric Propertiesmentioning

confidence: 99%

Physical properties of ebony seed (Pithecellobium flexicaule) and functional properties of whole and defatted ebony seed meal

et al. 2014

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A partial characterization was done of ebony (Pithecellobium flexicaule) seed physical properties, and how defatting affected some functional properties of ebony seed meal. Average seed dimensions were 13.02 mm length, 8.78 mm width and 9.65 mm thickness. Geometric diameter was 10.76 mm, volume was 530 mm(3), surface area was 364.33 mm(2), sphericity was 83.26 % and aspect ratio was 68.24 %. Thousand-seed weight was 0.70 Kg, of which 0.42 Kg (60 %) represented the kernel. Defatted ebony seed meal differed from whole meal in all measured parameters, particularly in its protein (44.72 g/100 g) and carbohydrates (44.12 g/100 g) proportions. The defatted meal had higher water absorption capacity (1.28 g/g sample), water solubility capacity (26.06 %), oil absorption capacity (2.04 g/g sample), emulsifying capacity (53.78 %) and gelling capacity (8 % w/v) than the whole meal. Ebony seed physical properties may prove useful in designing post-harvest processing equipment and in quality control. The high protein content of defatted ebony seed meal suggests its use as a natural alternative ingredient in numerous food industry applications.

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“…Hence, a gap exists in the evaluation of groundnut sheller performance. Research on nut moisture content required for optimum shelling performance has yielded varying results, with values of 5% , 13% and 15% being suggested (Adedeji and Ajuebor, 2002;Akcali et al, 2006;and Nyaanga et al, 2007). Results from concave clearance tests recommend differing optimum values of 12 mm, 18 mm and 30 mm (Adedeji and Ajuebor, 2002;Helmy et al, 2007 andRostami et al, 2009).…”

Section: Statement Of the Problemmentioning

confidence: 99%

Influence of Groundnut and Machine Characteristics on Motorised Sheller Performance

Simiyu¹

2015

AJAF

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Groundnut shelling is a fundamental process in post-harvest management. Manual shelling is inefficient and laborious with low throughput. Motorised shellers experience less than 100% shelling efficiency and varying levels of kernel damage. From the research, throughput per unit power consumption and shelling efficiency increased with reduction in % moisture content (mc), with maximum outputs realized at 6%. Kernel mechanical damage decreased with increase in % mc up to a minimum at between 15% and 18% mc then increased marginally with further rise in mc. Meanwhile, throughput per unit power consumption increased with bulk density of the groundnut variety being shelled. In addition, kernel to pod diameter ratio had a significant influence on the outputs under study. All the three output parameters under review rose exponentially with increase in feed rate. Throughput per unit power consumption and shelling efficiency rose steadily with increase in shelling speed with the highest values obtained at a shelling speed of about 12 m/s. Kernel mechanical damage remained low (less than 4%) for speeds below 8 m/s, and then rose sharply with further increment in speed. All the output parameters increased with reduction in concave clearance with maximum values obtained at 10 mm clearance. Steel and rubber paddles yielded the highest throughput per unit power consumption. At low shelling speeds (less than 8 m/s), rolling rubber and steel pipes resulted in lowest shelling efficiency and kernel mechanical damage but at higher speeds they resulted into both highest shelling efficiency and kernel mechanical damage.

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Selected Physical Properties of Peanuts

Cited by 34 publications

References 14 publications

Selected Geometric Characteristics, Density, and Mechanical Properties of Unsplit Pistachio Nut

Selected Geometric Characteristics, Density, and Mechanical Properties of Unsplit Pistachio Nut

Physical properties of ebony seed (Pithecellobium flexicaule) and functional properties of whole and defatted ebony seed meal

Influence of Groundnut and Machine Characteristics on Motorised Sheller Performance

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