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Serdang, Malaysia

Siregar J.P.,3400 UPM | Salit M.S.,3400 UPM | Ab Rahman M.Z.,University Putra Malaysia | Mohd Dahlan K.Z.H.,Malaysian Nuclear Agency
Pertanika Journal of Science and Technology | Year: 2011

This paper studied the thermal behaviour of pineapple leaf fibre (PALF) reinforced high impact polystyrene (HIPS) composite. Thermogravimetric analysis (TGA) and differential scanning calorimetric (DSC) analysis were used to measure the thermal characteristic of HIPS/PALF composites. In particular, the TGA analysis was utilized to measure the degradation and decomposition of materials in neat polystyrene, pineapple fibre, and the composites. The measurements were carried out in the temperature of 25°C - 800°C, at a heating rate of 20°C min-1 and the nitrogen gas flow was 50 mL min-1. The temperature of the DSC analysis was programmed to be between 25°C - 300°C. The results from TGA analysis show that the addition of pineapple fibre has improved the thermal stability of the composites as compared to neat HIPS. In addition, the effects of compatibilising agent and surface modification of PALF with alkali treated were also determined and compared. © Universiti Putra Malaysia Press. Source


Kaveh K.,3400 UPM | Ibrahim R.,3400 UPM | Emadi M.,University Putra Malaysia | Bakar M.Z.A.,University Putra Malaysia | Ibrahim T.A.,University Putra Malaysia
Journal of Animal and Veterinary Advances | Year: 2010

Osteoporosis is a metabolic bone disorder, which is characterized by a decreased in the overall amount of bone mass. This is major public problem with 30% mortality rate within the first year following osteoporotic hip fracture. The altered microarchitectural structure of bone would lead to increased susceptibility to fractures. By improving the public health and aging of the population, the incidence of this disorder is also increasing. Different treatments costs of patients is showing an increasing trend, which implies that there should be a public education regarding this threatening abnormality. Prevention rather than treatment has to be publicized by correct instructing the population and especially in the women society. This review has a brief simple but concise outlook at osteoporosis its manifestation, treatment and prevention. © Medwell Journals, 2010. Source

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