1.Radiation exposure to the surgeon during femoral interlocking nailing under fluoroscopic imaging.
T S Tengku Muzaffar ; Y Imran ; M A Iskandar ; A Zakaria
The Medical journal of Malaysia 2005;60 Suppl C():26-9
Femoral interlocking nailing requires fluoroscopic assistance for insertion of the nail and distal screws. In this study, scattered radiation to the eye and hand of the operating surgeon was measured during the procedure. Thermo-luminescent dosimeter (TLD) was used to quantify the dose received by the surgeon. The mean radiation exposure time during the procedure was 3.89 minutes. The mean scattered radiation doses to the hand and eye were 0.27 mSv and 0.09 mSv per procedure respectively. These very low doses have made a surgeon very unlikely to receive more than the recommended annual dose limit set by the National Council on Radiological Protection.
Radiation
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Procedures
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Millisievert
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Hand
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Eye
2.Synthesis and characterization of poly(p-phenylene vinylene).
M Y Abd Rashid ; A Abu Bakar ; M T Mohd Asri ; S M Iskandar
The Medical journal of Malaysia 2004;59 Suppl F():135-6
Poly (p-phenylene vinylene) (PPV) was synthesized from p-xylylene bis(tetrahydrothiophenium chloride) using the Wessling route and characterized by Fourier Transform Infra-Red (FTIR) and UV-visible (UV-VIS) spectroscopic techniques. The significance of thermal treatment along with evolution of precursor polymer to polymer PPV was also studied through these spectroscopic techniques. Thermally Stimulated Current (TSC) measurements indicated the presence of crystallization, sulphonium group which occurred through the evolution from precursor polymer to polymer PPV during thermal treatment.
lower case pea
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Polymers
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Synthesis
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therapeutic aspects
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Methodology
3.Radiation and temperature effects on conductivity properties of PVA-KOH-PC composite.
M T Mohd Asri ; S Elias ; S M Iskandar ; S Abd Halim ; H Jumiah ; A R M Zaki ; K Taiman ; M Y Abd Rashid ; A A Mohamad
The Medical journal of Malaysia 2004;59 Suppl F():139-40
The aim of this work was to study radiation and the effects of temperature on conductivity properties of polyvinyl alcohol (PVA)-based potassium hydroxide (KOH) and propylene carbonate (PC), where the ionic conduction preferentially occurs in the amorphous phase by free radicals ions through gamma-irradiation. Alkaline composite polymer electrolyte (ACPE) consisting of PVA, KOH and PC of different concentration ratios were prepared by solvent-casting technique. The ACPE were irradiated with different doses from 5 kGy up to 200 kGy. The conductivity properties of the electrolyte films were measured at different frequencies in the range 20 Hz to 1 MHz using LCR meter. The results showed that the conductivity properties were dependent on the radiation dose, temperature and the concentration of the polymer blends.
Radiation
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asparaginase/prednisone/vincristine
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Personal Computers
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Temperature
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Concentration