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  • 1.
    Kumar, Raj
    et al.
    National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
    Sirajuddin,
    National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
    Solangi, Amber Rehana
    National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
    Amin, Sidra
    National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
    Mahar, Ali Muhammad
    National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
    Abro, Muhammad Ishaque
    Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro, Pakistan.
    Shaikh, Tayyaba
    National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
    Shah, Syed Muhammad Usman Ali
    Department of Electronics, NED University of Engineering and Technology, Karachi, Pakistan.
    Tahira, Aneela
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Ibupoto, Zafar Hussain
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Dr. M. A. Kazi Institute of Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
    Synthesis of Sheet Like Morphology of NiO for Sensitive and Selective Determination of Urea2017In: Sensor Letters, ISSN 1546-198X, E-ISSN 1546-1971, Vol. 15, no 10, p. 803-810Article in journal (Refereed)
    Abstract [en]

    An efficient and simple method has been demonstrated for the synthesis of nickel oxide nanostructures using urea as a capping agent. The nanosheet-like morphology was confirmed by scanning electron microscopy, crystalline nature was studied by using the X-ray diffraction (XRD) and surface area of nanomaterial was investigated by automated sorption analyzer. Then synthesized NiO nanostructures were used to fabricate the surface of glassy carbon electrode (GCE). The electrocatalytic parameters of modified NiO/GCE electrode were investigated by using various techniques such as electrochemical impedance spectroscopy (EIS), square wave voltammetry (SWV), differential pulse voltammetry (DPV), normal pulse voltammetry (NPV) and cyclic voltammetry (CV) and chronoamperometry. Various working experimental conditions were optimized in order to attain the highest sensitivity for the determination of urea and the highest peak current 1032 μA of response were obtained at 100 μM concentration of urea. A linear calibration plot was obtained for peak current versus concentration of urea in the range of 10 μM urea to 80 μM urea with a good detection limit of 2 μM. The proposed working strategy was successfully employed for the estimation of urea in human urine samples and the obtained results are found satisfactory. The newly functional urea sensor can be exploited at large scale as an alternative analytical device beside to the other reported urea sensors

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  • 2.
    Saeed, Sumbul
    et al.
    Institute of Biotechnology and Genetic Engineering, University of Sindh-76080, Jamshoro, Pakistan.
    Rafiq, Muhammad
    Institute of Biotechnology and Genetic Engineering, University of Sindh-76080, Jamshoro, Pakistan.
    Baloach, Qurrat-ul-Ain
    Dr. M. A. Kazi Institute of Chemistry University of Sindh-76080, Jamshoro, Pakistan.
    Naqvi, Syed Habib Ahmed
    Institute of Biotechnology and Genetic Engineering, University of Sindh-76080, Jamshoro, Pakistan.
    Tahira, Aneela
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Willander, Magnus
    Department of Science and Technology, Campus Norrkoping, Linkoping University.
    Akhtar, Mansoor
    Key Lab of Polyoxometalate of Science, Northeast Normal University, Changchun City, Jilin Province, P. R. China.
    Ibupoto, Zafar Hussain
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Dr. M. A. Kazi Institute of Chemistry University of Sindh-76080, Jamshoro, Pakistan.
    Realization of Peptone Biosensor Based on Newly Prepared NiO Nanostructures2017In: Sensor Letters, ISSN 1546-198X, E-ISSN 1546-1971, Vol. 15, no 10, p. 822-826Article in journal (Refereed)
    Abstract [en]

    The present study authenticates the fabrication of nickel oxide porous shaped nanostructure by hydrothermal method. The novel and functionalized nickel oxide nanomaterial were visualized by using scanning electron microscopy (SEM) and X-ray diffraction techniques (XRD). NiO nanomaterial advertised sensitive, selective and attracted morphology for the development of peptone biosensor. Phenylalanine displays a soft template and growth directing agent for the developing of nickel oxide low dimension nanostructures. The nickel oxide nanomaterial together with protease possesses tremendous role towards the oxidation potential phenomena and transfer of anodic electro-catalytic current for the peptone. The generation of low potential electrochemical signals exhibited the determination of peptone by utilizing different electrochemical techniques for the given concentration ranging from 0.1 mM to 2.5 mM with the measured limit of detection about 0.002 mM with a sensitivity of 107200 μA/mMCm2. The well-defined and highly developed sensor system provides the standard platform for the fabrication and functioning of new devices that are helpful for the determination of many biological macromolecules. The presented peptone biosensor is highly selective, sensitive, and reproducible that could also be useful for the determination of peptone from various milk samples.

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    fulltext
  • 3.
    Sberveglieri, Veronica
    et al.
    University of Brescia.
    Camona, E. N.
    Department of Science and Methods for Engineering, University of Modena and Reggio Emilia.
    Falasconi, Matteo
    CNR IDASC SENSOR Lab, University of Brescia.
    Concina, Isabella
    CNR-INO SENSOR Lab.
    Pulvirenti, Andrea
    Università di Modena e Reggio Emilia.
    Fast identification of different kind of green coffee by electronic nose2014In: Sensor Letters, ISSN 1546-198X, E-ISSN 1546-1971, Vol. 12, no 6/7, p. 1110-1112Article in journal (Refereed)
    Abstract [en]

    The present contribution is focused on the application of the Electronic Nose to the fast detection of fungi in green coffee. The Electronic nose applied in this study is based on array of 6 metal oxide gas sensors with 4 obtained by the film technology and 2 by nanowire technology. The detection of mold in green coffee was achieved by the EN thanks to the cooperation use of different chemical and microbiological (fenotipic) techniques aimed to detect metabolities. Acquired results strongly recommend the use of the EN as screening tools for the green coffee in industrial quality control laboratories, emphasizing at the same time some limits still affecting the sensor technology.

  • 4.
    Yadav, Divya
    et al.
    NIT Jalandhar, India.
    Chouhan, Shailesh Singh
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Vishvakarma, S.K.
    Indian Institute of Technology, Indore India.
    Raj, Balwinder
    NIT Jalandhar India.
    Application Specific Microcontroller Design for Internet of Things Based Wireless Sensor Network2018In: Sensor Letters, ISSN 1546-198X, E-ISSN 1546-1971, Vol. 16, no 5, p. 374-385Article in journal (Refereed)
    Abstract [en]

    Today sensors are all over the place. We undervalue it, yet there are sensors in our vehicles, in our advanced cells, in processing plants controlling CO2 discharges, and even in the ground observing soil conditions in vineyards. WSN surprisingly cover the broad area of applications, and research and technology advance continuously increase their application field. The internet of things (IoT) introduced in correspondence to WSNs. WSN was traditionally recognized fundamental enabler for the IoT standard. WSNs make IoT applications valuable for both sensing and actuation. In this paper we design the microcontroller specifically for IoT based wireless sensor network. It takes the data from the different sensor node and send it to the gateway sensor node. We also design the Serial communication Peripheral (SPI) so that fast data transmission can be obtained very easily. Internal memory is used in the controller to hold the data for a short period, and then it is transmitted to the other wireless sensor node.

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