Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.
2011
Volume 14
Issue 3
Topic:
Food Science and Technology
ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Shakeri M. , Khodabakhshian R. 2011. THE PHYSICAL ATTRIBUTES OF SAFFLOWER SEED AS A FUNCTION OF MOISTURE CONTENT, VARIETY AND SIZE, EJPAU 14(3), #06.
Available Online: http://www.ejpau.media.pl/volume14/issue3/abs-06.html

THE PHYSICAL ATTRIBUTES OF SAFFLOWER SEED AS A FUNCTION OF MOISTURE CONTENT, VARIETY AND SIZE

Mohsen Shakeri, Rasool Khodabakhshian
Department of Agricultural Machinery Ferdowsi University of Mashhad

 

ABSTRACT

Physical attributes of two common Iranian varieties of safflower seed (namely Golshid and Afshan), such as geometric properties (size, geometric mean diameter and sphericity), gravimetric properties (thousand seed mass, bulk density, true density and porosity) frictional properties (emptying angle of repose and coefficient of static friction on four structural surfaces) and terminal velocity were determined as a function of size (large, medium, small) and moisture content in the range of 4 to 20% (d.b.). The results showed that the mean values of all geometric properties increased linearly with increasing moisture content. Among the varieties, Afshan had the highest values of geometric properties, in all moisture contents and size studied. At studied moisture contents and size categories, thousand grain mass, true density and porosity increase linearly, but the bulk density of safflower seeds linearly decrease as moisture content increase from 4 to 20 %. Among the applied surfaces, rubber (0.5–0.69) showed the highest value of friction coefficient safflower seed followed by plywood (0.45–0.63), galvanized iron (0.41–0.54) and aluminium (0.36–0.47). The obtained values of emptying angle of repose increase linearly with an increase in moisture content and size categories. The terminal velocity of Golshid variety varied from 6.1 to 6.7, 5.8 to 6.3 and 5.3 to 5.9 m/s for large, medium and small sizes, respectively. The range of terminal velocity for Afshan variety obtained 6.4–7.2, 6.3–6.9 and 6–6.6 m/s, respectively.

Key words: Frictional properties, geometric properties, gravimetric properties, safflower seed, terminal velocity .


Mohsen Shakeri
Department of Agricultural Machinery
Ferdowsi University of Mashhad
P.O. Box. 91775-1163 Mashhad, Iran

Rasool Khodabakhshian
Department of Agricultural Machinery
Ferdowsi University of Mashhad
P.O. Box. 91775-1163 Mashhad, Iran
email: ra_kh544@stu-mail.um.ac.ir

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