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您的检索式：作者名="Muhammad Amir Ismail"
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| 1 | A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine显示文摘Nitrogen-doped reduced graphene oxide(NrGO)sheets decorated with Co(OH)_2nanoflakes were prepared by a single-step hydrothermal process.The morphological and structural characterizations of as synthesized Nr GO@Co(OH)_2nanoflakes were performed by field emission scanning electron microscopy(FESEM),EDX-mapping and X-ray diffraction(XRD).Nr GO@Co(OH)_2nanoflakes modified glassy carbon electrode(GCE)was used for electrochemical sensing of dopamine in neutral medium.The nanocomposite modified electrode showed enhanced electrochemical sensing ability for the detection of dopamine and the limit of detection(Lo D)was found to be 0.201μM with a sensitivity value of 0.0286±0.002 m A m M^(-1).Interference studies revealed that Nr GO@Co(OH)_2─GCE endow excellent selectivity for DA detection even in the presence of higher concentration of common co-existing physiological interfering analytes.Additionally,proposed sensor demonstrated excellent performance in urine samples with promising reproducibility and stability. | Muhammad Mehmood Shahid Ahmad H. Ismail Ali MA. Abdul Amir AL-Mokaram R. Vikneswaran Sohail Ahmad Amir Hamza Arshid Numan | 2017 | Progress in Natural Science:Materials International2017，27，5： | 1 |
| 2 | Effect of head tilt on repeatability of optic nerve head parameters using Cirrus spectral-domain optical coherence tomography显示文摘AIM: To assess the repeatability of measuring optic nerve head(ONH) parameters using the Cirrus optical coherence tomography(OCT), as well as to assess the effect of head tilt on these measurements.METHODS: Thirty healthy participants with no evidence of glaucoma were recruited for the study. Visual acuity, intraocular pressure, standard automated perimetry and ocular examination were performed for each participant. One eye was then randomly selected and scanned undilated with the Cirrus OCT in 3 positions(neutral, 30° right tilt and 30° left tilt).RESULTS: Data collected from 29 eyes were used for analysis. One patient was omitted due to poor scan quality. The repeatability of the ONH parameters was analyzed using analysis of variance, coefficient of variation(COV) and intraclass correlation coefficient(ICC). Analysis of variance showed no statistically significant difference between 3 scans in a single position. There was good agreement between measurements(ICC 0.919-0.996, COV 1.94%-5.48%).Even with the presence of head tilt, repeated scans in the 3 positions showed good agreement as well(ICC 0.888-0.996, COV 2.04%-5.39%).CONCLUSION: Serial measurements of ONH parameters using the Cirrus OCT are found to have good repeatability. The ONH parameters with Cirrus OCT also maintain good repeatability despite head tilt. | Lilian Hui Li Koh Muhammad Amir Ismail Sae Cheong Yap Elizabeth Poh Ying Wong Leonard Wei Leon Yip | 2016 | International Journal of Ophthalmology(English edition)2016，9，8： | 0 |
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