Compression Characteristics of the Extract of Orthosiphon Stamineus


So'bah A., Chin N.L., Yus Aniza Y.  
Department of Process and Food Engineering, Faculty of Engineering, University Putra Malaysia, 43400 UPM, Serdang, Selangor.   
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Compression Characteristics of the Extract of Orthosiphon Stamineus


Medicinal and Aromatic Plants Seminar (MAPS 2008)


21st October - 22nd October 2008

Place Held

The Legend Hotel, Kuala Lumpur


This study presents the compression characteristics of a Malaysian herb extract from Orthosiphon staminues, also known as 'misai kucing'. This herb has been used due to its medicinal and nutritional advantages. The main purpose of this project is to investigate the compression characteristics of the extract which is important for downstream processing in herbal industries. A commercial universal testing machine with a 13-mm-cylindrical stainless steel uniaxial die was used to compress the extract. A range of pressure from 7.5 to 74 MPa was applied with a compression speed of 5 mms┬╣. The results were presented through tensile strength and pressure-volume relationship in order to study the effect of the quantity of feed powder. Four classical compression models were used to validate the data, namely, Heckel, Kawakita, Walker, and Cooper-Eaton. Amongst the four models used, it was found that 0.5 g tablet feed powder compressed more easily compared to 1.0 g tablet, at the same compression force. As for the tensile strength test, the tensile strength of compressed 0.5 g feed powder was the strongest. Based on this simple approach, a better understanding of the compression characteristics of this herb was obtained which would be essential for the further development of herbal industries in Malaysia.


Orthosiphon stamineus; 'misai kucing'; compression characteristics; herb extract


Plenary: Session 3


Think Global, Act Local: A New Paradigm In Malaysian Herbal Industry (Prof. Emeritus Dr. Abdul Latif Ibrahim-UNISEL)