Farklı nem düzeylerinde kanola tohumlarının fiziksel özelliklerinin belirlenmesi

Determination of the Physical Properties of the Canola Seeds in Different MoistureContent LevelsAbstract: The purpose of the research was the studying of the effects of three different moisture contentsconstituting of 6.36, 16.54 and 25.94% on the physico-mechanical properties of canola seeds. Turkish cultivar ofcanola seeds called as ‘Turan’ was used in the research. With the research, it was found that the dimensionalproperties such as the length, diameter, projection area and geometric mean diameter and volumetric properties likethe bulk density, one thousand seed mass, porosity and sphericity were changed with the increases in moisturecontent of canola seeds. One thousand kernel mass and kernel volume of canola seeds are determined to increasefor the moisture contents examined as 6.36, 16.54 and 25.94 %, respectively. The projection areas of canolakernels were investigated with two different digital image processing software developed for digital imageprocessing and evaluation purposes, as well as with the mathematical formula given by Mohsenin (1986) andSitkei (1986) according to the planes in the three dimensional space. In the study, true density was observed toincrease with the moisture content increments in canola seed, while the bulk density of seed decreased withmoisture content increments. Similarly, the equivalent spherical diameter of canola kernels was observed toincrease with the moisture content. The variations on the sphericity of canola kernels depending on the moisturecontents were as the increasing way while the moisture contents of canola seeds went from 6.36 to 16.54%, andthen in decreasing way when they increased to 25.94%. Yet, it was seen that the variations of the oblateness of theseeds decreasingly increase with the increases of moisture contents. Finally, terminal velocity of the canola seedsinvestigated with this study showed a logarithmic variation trend by increasing with the moisture content increases.Keywords: Physical property, canola, moisture, pneumatic conveying.Farkli Nem Duzeylerinde Kanola Tohumlarinin Fiziksel Ozelliklerinin BelirlenmesiOz: Bu arastirmayla, pnomatik iletimlerinde %6.36, 16.54 ve 25.94 seklindeki uc farkli nem duzeyinin kanolatohumunun fiziksel ozellikleri uzerine etkileri incelenmistir. ‘Turan’ kanola cesidi bitkisel materyal olarakkullanilmistir. Arastirmayla kanolanin uzunluk, genislik, kalinlik, cap, projeksiyon alani ve geometrik ortalama capgibi boyut ozellikleri ile hacim agirligi, ozgul kutle, bin dane agirligi, porozite, kuresellik, basiklik ve esdeger kurecapi gibi hacimsel ozelliklerinin neme bagli degisimi belirlenmistir. Kanola tohumlarinin projeksiyon alanlari ikifarkli sayisal goruntu isleme yazilimi kullanilarak incelenmistir. Arastirmada, Kanola tohumlarinin dane hacmi ilebin dane agirliklarinin nemle arttigi, ozgul kutlenin kanola tohumunun nem icerigindeki artislarla artacagi, bununyaninda hacim agirliginin ise dane nem icerigindeki artislara bagli olarak azaldigi gozlenmistir. Benzer sekilde,esdeger kure caplarinin, danenin nem icerigiyle arttigi bulunmustur. Nem iceriklerindeki artisa bagli olarak kanolatohumlarinin kureselligindeki degisimler; nem icerikleri %6.36’ dan %16.54’ e yukseldiginde artis yonunde, dahasonrasinda nem icerikleri %25.94’ e ciktiginda azalan seyir gosterdi. Tohumlarin nem iceriklerindeki artisa bagliolarak basiklik oranindaki degisimlerin ise goreceli olarak nem icerigi %16.54’ e ciktiginda azaldigi, %25.94’ ubuldugunda ise artigi saptanmistir. Arastirma kapsaminda incelenen Kanola tohumlarinin pnomatik yollarlailetimlerinde sistem tasarimindaki onemli parametrelerden birisini olusturan terminal hiz degerlerinin neme baglidegisimleri; logaritmik artan bir degisim egilimi gostermistir.Anahtar Kelimeler: Fiziko-mekanik ozellik, kanola, nem, pnomatik iletim