Nur Farahiyah Mohammad
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Preferred name
Nur Farahiyah Mohammad
Official Name
Nur Farahiyah, Mohammad
Alternative Name
Mohammad, N. F.
Nur Farahiyah, Mohammad
Mohammad, N.
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Scopus Author ID
36872346600
Researcher ID
X-6539-2019

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Nano Hydroxyapatite (Nano-HA) based on pholas orientalis shells and degradation analysis

2023-04 , Mohd Riza Mohd Roslan , Nashrul Fazli Mohd Nasir , Nur Farahiyah Mohammad , Farah Diana Mohd Daud , Cheng Ee Meng , Beh Chong You

Millions of tons of seashells are produced every day as waste around the world. These underutilized seashells waste was executed as calcium precursor by researcher to synthesis the nano-hydroxyapatite (nano-HA). Nano-HA was successfully synthesised from Pholas Orientalis seashells waste via the chemical precipitation method. Different sintering temperatures were implemented to evaluate the physicochemical criteria of nano-HA. The obtained powders were examined by various physicochemical methods such as XRD, FTIR, FESEM, EDX and degradation analysis. The peaks in XRD and FTIR analysis the HA is successfully produced. The FESEM images on the other hand showing the HA particle in nano size range with rice-like structure. Meanwhile, a variation of Ca/P ratio can be observed in respect to sintering temperatures. The Ca/P ratio for HA-WS, HA-S500 and HA-S700 sample is 1.78, 2.03 and 1.57 respectively. Different sintering temperatures result in different crystallinity value which consequently affects its degradation profile.

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Synthesizing and Optimization the Hydroxyapatite Based on Corbiculacea Seashells

2021-01-01 , Mohd Riza Mohd Roslan , Nashrul Fazli Mohd Nasir , Nur Farahiyah Mohammad , Cheng Ee Meng , Nasrul Amri Mohd Amin , Abdul Khalid M.F. , Mohd Zakimi Zakaria , Muhammad Mokhzaini Azizan , Muzammil Jusoh

Hydroxyapatite (HA) is one of the main components in bone which functions to enhance its cell regeneration. Synthetically produced HA, based on seashell resources has higher biocompatibility, and in high demand especially in bone tissue engineering. However, the secondary phase of HA production are calcium oxide and carbonate, which impedes its performance. HA is synthesized via wet chemical precipitation and optimization were done to obtain nearly pure HA by manipulating the pH value and sintering temperature. It is expected that the combination of these parameters will optimize the amount of secondary phase hence attained nearly stoichiometric or pure HA. HA powders were analyzed through Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-ray Spectrometry (EDX).

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EFFECT OF NITRATE ACID TREATED DOLOMITE ON THE TENSILE PROPERTIES OF ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE (UHMWPE) COMPOSITES

2024-01-01 , Abdullah S.F.A. , Saleh S.S.M. , Nur Farahiyah Mohammad , Syarifah Nuraqmar Syed Mahamud , Mohd Firdaus Omar , Akil H.M.D. , Chang B.P. , Saliu H.R. , Rostam N.H. , Gondro J.

Ultra-High Molecular Weight Polyethylene (UHMWPE) polymers have been used in biomedical applications due to its biocompatibility, durability, toughness and high wear resistance. To enhance the mechanical properties, various types of minerals are commonly utilized as fillers in UHMWPE. One of the minerals is dolomite, which has been recognized as a valuable mineral with versatile applications, particularly in the field of biomedical applications. This paper presents the tensile properties of UHMWPE composites that filled with dolomite and treated-dolomite at various filler loading (i.e., 1-5 wt.%). Nitric acid and diammonium phosphate were used to treat the dolomite. From the results, the peaks of the FTIR spectrum displays carbonate (CO3–2), phosphate (PO4–3) and hydroxyl (OH–) groups in the ct-dolomite powder sample while the XRD pattern reveals that using dolomite treated with 1M nitric acid resulted in the presence of calcium hydroxide phosphate (Ca10(PO4)5(OH)) and MgO. For tensile strength, UHMWPE/ct-dolomite composites show better tensile strength than the pure UHMWPE composites. Treated improve the dolomite filler and resulted in significantly better matrix-filler interfacial interactions and improve the properties.

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