Stress relaxation of selected viscoelastic herbs
This study presents stress relaxation characteristics of selected viscoelastic herbs which are Andrographis paniculata, Orthosiphon stamineus, and Eurycoma longifolia Jack. These herbs can be found in the Asia region and have been reported on having several therapeutics properties. The herbs powders...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
Malaysian Tribology Society
2011
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| Online Access: | http://psasir.upm.edu.my/id/eprint/64280/ http://psasir.upm.edu.my/id/eprint/64280/1/t1-1.pdf |
| _version_ | 1848854957504069632 |
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| author | Yusof, Yus Aniza Mohd Din, S. N. Chin, Nyuk Ling Anuar, Mohd Shamsul |
| author_facet | Yusof, Yus Aniza Mohd Din, S. N. Chin, Nyuk Ling Anuar, Mohd Shamsul |
| author_sort | Yusof, Yus Aniza |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | This study presents stress relaxation characteristics of selected viscoelastic herbs which are Andrographis paniculata, Orthosiphon stamineus, and Eurycoma longifolia Jack. These herbs can be found in the Asia region and have been reported on having several therapeutics properties. The herbs powders were compressed into tablets, which is convenient for consumption and packaging. A uniaxial die of 13mm in diameter was used using a universal testing machine with pressures ranging from 15 to 30 MPa and the compression speeds between 3mm/min and 6mm/min. The stress relaxation characteristics and related parameters were compared. The Eurycoma l. Jack showed plastic deformation, however the value of the asymptotic residual modulus indicate that the deformation was insignificant to form a coherent tablet. Binder is suggested to be added to the compression process. Thus, these properties are essential to understand storage and transportation of herbal tablets. |
| first_indexed | 2025-11-15T11:18:07Z |
| format | Conference or Workshop Item |
| id | upm-64280 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T11:18:07Z |
| publishDate | 2011 |
| publisher | Malaysian Tribology Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-642802018-07-04T02:31:32Z http://psasir.upm.edu.my/id/eprint/64280/ Stress relaxation of selected viscoelastic herbs Yusof, Yus Aniza Mohd Din, S. N. Chin, Nyuk Ling Anuar, Mohd Shamsul This study presents stress relaxation characteristics of selected viscoelastic herbs which are Andrographis paniculata, Orthosiphon stamineus, and Eurycoma longifolia Jack. These herbs can be found in the Asia region and have been reported on having several therapeutics properties. The herbs powders were compressed into tablets, which is convenient for consumption and packaging. A uniaxial die of 13mm in diameter was used using a universal testing machine with pressures ranging from 15 to 30 MPa and the compression speeds between 3mm/min and 6mm/min. The stress relaxation characteristics and related parameters were compared. The Eurycoma l. Jack showed plastic deformation, however the value of the asymptotic residual modulus indicate that the deformation was insignificant to form a coherent tablet. Binder is suggested to be added to the compression process. Thus, these properties are essential to understand storage and transportation of herbal tablets. Malaysian Tribology Society 2011 Conference or Workshop Item PeerReviewed text en http://psasir.upm.edu.my/id/eprint/64280/1/t1-1.pdf Yusof, Yus Aniza and Mohd Din, S. N. and Chin, Nyuk Ling and Anuar, Mohd Shamsul (2011) Stress relaxation of selected viscoelastic herbs. In: Regional Tribology Conference (RTC 2011), 22-24 Nov. 2011, Bayview Hotel, Langkawi Island, Malaysia. (pp. 11-15). |
| spellingShingle | Yusof, Yus Aniza Mohd Din, S. N. Chin, Nyuk Ling Anuar, Mohd Shamsul Stress relaxation of selected viscoelastic herbs |
| title | Stress relaxation of selected viscoelastic herbs |
| title_full | Stress relaxation of selected viscoelastic herbs |
| title_fullStr | Stress relaxation of selected viscoelastic herbs |
| title_full_unstemmed | Stress relaxation of selected viscoelastic herbs |
| title_short | Stress relaxation of selected viscoelastic herbs |
| title_sort | stress relaxation of selected viscoelastic herbs |
| url | http://psasir.upm.edu.my/id/eprint/64280/ http://psasir.upm.edu.my/id/eprint/64280/1/t1-1.pdf |