http://localhost:80/xmlui/handle/123456789/502 2026-03-03T21:12:07Z 2026-03-03T21:12:07Z ASLAM JAMAL MOHAMMED MUZIBUR RAHMAN SHER BAHADAR KHAN MOHAMMED MARGUB ABDULLAH MOHD FAISAL ABDULLAH MUHAMMAD ASIRI AFTAB ASLAM PARWAZ KHAN KALSOOM AKHTAR http://localhost:80/xmlui/handle/123456789/20043 2024-01-17T10:42:10Z 2013-06-20T00:00:00Z

Title: Simple Growth and Characterization of α-Sb₂O₄: Evaluation of their Photo-catalytic and Chemical Sensing Applications Authors: ASLAM JAMAL; MOHAMMED MUZIBUR RAHMAN; SHER BAHADAR KHAN; MOHAMMED MARGUB ABDULLAH; MOHD FAISAL; ABDULLAH MUHAMMAD ASIRI; AFTAB ASLAM; PARWAZ KHAN; KALSOOM AKHTAR Abstract: A comprehensive study on the synthesis, characterization and application of antimony oxide (α-Sb2O4) has been reported in this paper. Antimony oxide (α-Sb2O4) is successfully synthesized by hydrothermal method using antimony chloride and urea as a reducing materials. The morphology of the nanomaterial is investigated by field emission scanning electron microscopy (FE-SEM). Sheet like morphology of α-Sb2O4 ranging from 0.2 µm to 3.0 µm are found in the FE-SEM images. The detailed structural characterizations are performed by X-ray diffraction (XRD), Fourier transform infrared spectrophotometer (FT-IR), and Raman spectrophotometer respectively. It has been confirmed that the synthesized materials are well-crystalline and pure antimony oxide (α-Sb2O4). Optical properties are studied using UV-VIS spectrophotometer, where the direct band-gap of α-Sb2O4 is calculated to be 3.26 eV. The photo-catalytic degradation and chemical sensing applications are successfully checked by simple and reliable UV/vis. spectroscopy and I-V methods respectively.

2013-06-20T00:00:00Z MUHAMMAD FARRAKH NAWAZ GUILHEM BOURRIÉ http://localhost:80/xmlui/handle/123456789/20042 2024-01-04T09:00:44Z 2012-02-02T00:00:00Z

Title: Development of Sensor Calibration against Standards using Measurement Software TestPointTM-CEC and Application to the Verification of pH Electrodes Authors: MUHAMMAD FARRAKH NAWAZ; GUILHEM BOURRIÉ Abstract: The acquisition, processing and presentation of data from many commercial devices have been simplified by use of personal computers (PCs) and effective software in last decades. As compared to text-based languages, such as BASIC, dataflow programmation (LabVIEWTM) and graphical programming (TestPointTM) have been developed and widely used in diverse scientific fields. Here, TestPointTM is used to control via IEEE-488 interface a system voltmeter; pH measurement is a master variable in analytical chemistry and environmental studies. For precise and accurate measurements of pH, timely verification and calibration of pH electrodes are essentially required. However, the sensitivity of most commercial pH-meters (0.1 mV) is not high enough to check the deviation with respect to Nernst’s law. With this combination of a high resolution voltmeter and graphical programming, data are acquired and processed as follows: a moving average is computed to check if equilibrium is attained and statistical tests are performed to define the confidence interval of the slope of the regression straight line. This allows the user to compute the deviation from the ideal law, generally statistically significant and to verify pH electrodes against NBS standards, according to IUPAC recommendations. A control chart can be easily drawn to define when the electrodes must be replaced. The method and the code can be easily modified to calibrate other sensors.

2012-02-02T00:00:00Z MOHAMMAD AFRASIABI ZEINAB REZAYATI ZAD SHOKAT KIANIPOUR ALI BABAEI ALI REZA TAHERI http://localhost:80/xmlui/handle/123456789/20041 2023-12-29T04:29:02Z 2013-08-08T00:00:00Z

Title: A Sensor for Determination of Tramadol in Pharmaceutical Preparations and Biological Fluids Based on Multi-Walled Carbon Nanotubes-Modified Glassy Carbon Electrode Authors: MOHAMMAD AFRASIABI; ZEINAB REZAYATI ZAD; SHOKAT KIANIPOUR; ALI BABAEI; ALI REZA TAHERI Abstract: A chemically modified electrode is constructed based on multi-walled carbon nanotube modified glassy carbon electrode (MWCNTs/GCE). It is demonstrated that this sensor could be used for determination of pharmaceutical important compound tramadol (TRA). The measurements were carried out using differential pulse voltammetry (DPV), cyclic voltammetry (CV) and chronoamperometry (CA) methods. DPV experiments of various concentration of TRA showed two linear dynamic ranges. The first linear dynamic range was from 4 μM to 35 μM, and the second linear dynamic range was between 60 μM to 550 μM. A detection limit of 0.38 µM (S/N = 3) was obtained. The analytical performance of this sensor has been evaluated for the detection of TRA in human serum, human urine and some pharmaceutical preparations with satisfactory results

2013-08-08T00:00:00Z SYED NISAR HUSSAIN SHAH MUHAMMAD SALMAN MASHOOD AHMAD MAHBOOB RABBAN AMIR BADSHAH http://localhost:80/xmlui/handle/123456789/20040 2023-12-22T05:21:21Z 2012-02-01T00:00:00Z

Title: Effect of Oleic Acid on the Permeation Kinetics of Diclofenac Diethylamine Authors: SYED NISAR HUSSAIN SHAH; MUHAMMAD SALMAN; MASHOOD AHMAD; MAHBOOB RABBAN; AMIR BADSHAH Abstract: In vitro permeation studies were done using modified Franz diffusion cell through rabbit skin and silicone membrane utilizing different ratios of oleic acid with diclofenac diethylamine (DDA) in normal saline and methanol mixture during present study. Solubility studies indicated linear increase in drug solubility with carrier concentration. The enhancing effect of all the enhancer’s ratios was found to be significantly greater than that of standard without enhancer (control). ‘Benchmark’ values with which to compare the performance of the vehicle are the flux values which were statistically no significant difference (P>0.05) across rabbit skin and silicone membrane. The input-rate values of all the ratios have shown a constant trend. The vehicles used were predominantly influencing the partition of the drug into the skin rather than the diffusion throughout the study. Consequently, changes in diffusion and/or partition may occur as a result of absorption or depletion of permeation enhancer inside the membrane/or skin over time which validates our results.

2012-02-01T00:00:00Z