Optimization of Mechanical Oil Expression from Sandbox (Hura crepitans Linn.) Seeds

This is a retraction to: Optimization of Mechanical Oil Expression from Sandbox (Hura crepitans Linn.) Seeds https://dergipark.org.tr/en/pub/turkager/article/1004051

Retraction Note

An article titled 'Optimization of Mechanical Oil Expression from Sandbox (Hura crepitans Linn.) Seeds' by David Nwabueze ONWE and Adeleke Isaac BAMGBOYE with ID 1004051 have been submitted to our journal. This mentioned article was published in the Turkish Journal of Agricultural Engineering Research in 2021 with the following volume and issue. 'Onwe, DN, Bamgboye AI (2021). Optimization of Mechanical Oil Expression from Sandbox (Hura crepitans Linn.) Seeds. Turkish Journal of Agricultural Engineering Research (TURKAGER), 2(2): 434-449. https://doi.org/10.46592/turkager.2021.v02i02.016’. An article similar to the aforementioned article in our journal was previously published in Poljoprivredna tehnika in the following volume and issue in 2020. ‘Nwabueze, O. D., & Isaac, B. A. (2020). Effect of process conditions on Sandbox seed oil yield by mechanical expression: A response surface approach. Poljoprivredna tehnika, 45(3), 70-81’. DOI: 10.5937/PoljTeh2003070N. The similarities between these two related articles are very high. In this sense, when both articles are examined in detail, it is seen that the figures and tables are the same, and the content is largely the same. Therefore, due to the fact that both articles are quite similar, our journal decided to retract the article ID 1004051 mentioned in our journal by the editorial board. Prof. Dr. Ebubekir ALTUNTAS Editor-in-Chief Turkish Journal of Agricultural Engineering Research https://dergipark.org.tr/en/pub/turkager

Abstract

Optimization of process variables has become very vital in oil extraction processes to obtain maximum oil yield from oilseeds and nuts. This work focussed on the optimization of process oil extraction process from sandbox seed by mechanical expression. Effects of moisture content, roasting temperature, roasting time, expression pressure and expression time on oil yield from sandbox seed was studied using a 5×5 Central Composite Rotatable Design of Response Surface Methodology experimental design. Results obtained were subjected to Analysis of Variance (ANOVA) and SPSS statistical tool at (p = 0.05). Optimum conditions predicted were validated by experiments. All the processing factors were significant at (p = 0.05) for the sandbox oil yield except roasting temperature. The experimental results and predicted values showed low deviation (0.01-0.62). Oil yields obtained from the sandbox seed at varying process conditions varied from 16.38-38.68%. The maximum oil yield of 38.68% was obtained when the sandbox seed was subjected to process conditions of 6% moisture content, 85°C roasting temperature, 15 min roasting time, expression pressure of 20 MPa and 8 min pressing time. Mathematical equations to predict sandbox seed oil yield at varying process conditions were developed with an R2 (0.8908). The optimum extractable oil yield of 38.95% was predicted for sandbox seed at processing conditions of 7.03% moisture content, 97.72°C roasting temperature, 11.32 min roasting time, 15.11 MPa expression pressure and 8.57 min expression time. The study results provide data for designs of process and equipment for oil extraction from sandbox and other oilseeds.

Keywords

• Process optimization
• sandbox seed
• oil extraction
• mechanical expression

Supporting Institution

None

Project Number

None

Thanks

Thank you

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