Browsing by Author "Kifilideen Lekan, Osanyinpeju"

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    APPLICATION OF VIBRATION TECHNIQUE FOR THE CONTROL OF PHYSICAL PROPERTIES OF YAM (Dioscorea spp.) SPROUTS DURING STORAGE IN FUNAAB, NIGERIA ENVIRONMENT
    (Center for Bioresource Research (CBR) Islamabad, Pakistan., 2022-03-25) Kifilideen Lekan, Osanyinpeju; Adewole A., Aderinlewo; Olawale U., Dairo; Olayide R., Adetunji; Emmanuel S.A., Ajisegiri
    Early sprouting of yam tuber is a typical problem during storage resulting into weight losses, deterioration, shrinkage and reduction in quality. This research work therefore carried out investigation on the application of vibration technique for the control of physical properties of yam (Dioscorea spp.) sprouts during storage in FUNAAB, Nigeria environment. The physical properties (length, number and weight of sprout, number of leaves and weight of roots) of the yam sprouts were determined for 140 white yam tubers. The yam tubers were divided into 108 experiment and 32 as control. The factors of the experimental design examined were frequency, amplitude and time of vibration of low (1 – 5 Hz, 5 mm and 3 minutes), medium (60 – 100 Hz, 10 mm and 10 minutes) and high (150 – 200 Hz, 20 mm and 15 minutes) respectively; weight of yam tuber of two levels of small (0.1 – 2.9 kg) and big (3.0 – 5.0 kg) were also considered. The tubers were stored for ten weeks after vibration, the physical properties of the yam sprouts were observed and records were taken every week. All the physical properties of yam sprouts examined followed the same trend. It was discovered that as the frequency, amplitude and time of vibration were increasing, the physical properties of the yam sprouts studied were decreasing significantly at p < 0.05 for both weight of yams between 0.1 – 2.9 kg and between 3.0 – 5.0 kg. The results revealed that mechanical vibration significantly help in slowing down sprouting in yam tubers.
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    Development of the shape of the cam profile of mechanical yam vibrator using cycloid motion
    (Association Research and Development Academy, ARDA, Bosnia, southeastern Europe, 2022-02-03) Kifilideen Lekan, Osanyinpeju; Adewole A., Aderinlewo; Olawale U., Dairo; Olayide R., Adetunji; Emmanuel S.A., Ajisegiri
    At a high frequency of vibration; the cam of a vibrator always encounters the issue of jamming or the follower rolling off or losing contact with the cam when the appropriate design is not carried out. This study, therefore, developed the shape of the cam profile of mechanical yam vibrator using cycloid motion. Displacement equations from the base circle to the cam profile were developed to obtain the shape of the cam using cycloid motion. A vibrometer was used to evaluate the developed 5 mm, 10 mm, and 20 mm cam sizes installed in a mechanical yam vibrator. The maximum displacement recorded for 5 mm, 10 mm and 20 mm cam sizes were 4.47 mm, 8.71 mm, and 14.54 mm respectively for low (1 – 5 Hz) frequency; 4.58 mm, 8.84 mm and 16.34 mm respectively for medium (60 – 100 Hz) frequency; and 4.66 mm, 9.09 mm and 17.30 mm respectively for high (150 – 200 Hz) frequency. This study shows that a cycloid cam would operate smoothly at low, medium, and high frequencies of vibration and function properly for frequency and displacement of vibration up to 200 Hz and 20 mm respectively without jamming and failing. A cycloid cam is therefore recommended for low, medium, and high frequencies motion of vibration