Now showing items 1-16 of 16

  • Bioavailability of organic contaminants in sediments. 

    Yates, Kyari (The Robert Gordon University Department of Pharmacy and Life Sciences, 2008-03)
    The bioavailability of polycyclic aromatic hydrocarbons (PAHs) and chlorobiphenyls (CBs) in sediments is largely dependent on the freely dissolved concentration of these pollutants. However, measuring these is challenging, ...
  • The crystallinity and thermal degradation behaviour of polyamide 6/oil based mud fillers (PA6/OBMFs) nanocomposites. 

    Siddique, Shohel; Kwoffie, Lorraine; Addae-Afoakwa, Kofi; Yates, Kyari; Njuguna, James (Elsevier https://doi.org/10.1016/j.polymdegradstab.2018.11.004, 2018-11-10)
    SIDDIQUE, S., KWOFFIE, L., ADDAE-AFOAKWA, K., YATES, K. and NJUGUNA, J. 2018. The crystallinity and thermal degradation behaviour of polyamide 6/oil based mud fillers (PA6/OBMFs) nanocomposites. Polymer degradation and stability [online], In Press. Available from: https://doi.org/10.1016/j.polymdegradstab.2018.11.004
    The crystallinity and thermal degradation behaviours of Polyamide 6/Oil Based Mud Fillers (PA6/OBMFs) nanocomposites have been investigated using DSC and TGA. TGA indicates the onset decomposition temperature of D1/2 ...
  • Demulsification and recycling of spent oil based drilling fluid as nanofiller for polyamide 6 nanocomposites. 

    Adegbotolu, Urenna V. (Robert Gordon University School of Engineering, 2016-09-01)
    ADEGBOTOLU, U.V. 2016. Demulsification and recycling of spent oil based drilling fluid as nanofiller for polyamide 6 nanocomposites. Robert Gordon University, PhD thesis.
    Spent oil based drilling fluid and cutting wastes are global liabilities due to their hazardous hydrocarbon content which impacts negatively on flora, fauna, and global carbon footprint. The formulation of two demulsifiers ...
  • Determination of sinapine in rapeseed pomace extract: its antioxidant and acetylcholinesterase inhibition properties. 

    Yates, Kyari; Pohl, Franziska; Busch, Maike; Mozer, Annika; Watters, Louis; Shiryaev, Andrey; Kong Thoo Lin, Paul (Elsevier https://doi.org/10.1016/j.foodchem.2018.10.045, 2018-10-10)
    YATES, K., POHL, F., BUSCH, M., MOZER, A., WATTERS, L., SHIRYAEV, A.and KONG THOO LIN, P. 2018. Determination of sinapine in rapeseed pomace extract: its antioxidant and acetylcholinesterase inhibition properties. Food chemistry [online], 276, pages 768-775. Available from: https://doi.org/10.1016/j.foodchem.2018.10.045
    Sinapine is the main secondary metabolite present in rapeseed pomace (RSP) with its concentration being dependent on rapeseed processing, growing conditions, extraction parameters and the country of origin. Here we report, ...
  • Evaluation of spot and passive sampling for monitoring, flux estimation and risk assessment of pesticides within the constraints of a typical regulatory monitoring scheme. 

    Zhang, Zulin; Troldborg, Mads; Yates, Kyari; Osprey, Mark; Kerr, Christine; Hallett, Paul D.; Baggaley, Nikki; Rhind, Stewart M.; Dawson, Julian J. C.; Hough, Rupert L. (Elsevier https://dx.doi.org/10.1016/j.scitotenv.2016.06.219, 2016-07-15)
    ZHANG, Z., TROLDBORG, M., YATES, K., OSPREY, M., KERR, C., HALLETT, P.D., BAGGALEY, H., RHIND, S.M., DAWSON, J.J.C. and HOUGH, R.L. 2016. Evaluation of spot and passive sampling for monitoring, flux estimation and risk assessment of pesticides within the constraints of a typical regulatory monitoring scheme. Science of the total environment [online], 569-570, pages 1369-1379. Available from: https://dx.doi.org/10.1016/j.scitotenv.2016.06.219
    In many agricultural catchments of Europe and North America, pesticides occur at generally low concentrations with significant temporal variation. This poses several challenges for both monitoring and understanding ecological ...
  • Evaluation of the interactions between oilfield chemicals and reservoir rocks. 

    Wuyep, Elizabeth O.; Oluyemi, Gbenga Folorunso; Yates, Kyari; Akisanya, Alfred R.
    WUYEP, E.O., OLUYEMI, G.F., YATES, K. and AKISANYA, A.R. [2019]. Evaluation of the interactions between oilfield chemicals and reservoir rocks. Natural resources research [online], (accepted). Available from: https://doi.org/10.1007/s11053-019-09523-3
    Sand failure and production occurs when the formation stress exceeds the strength of the formation which is derived majorly from the natural material that cements the sand grain and cohesive forces. This study investigates ...
  • Geomechanical effects of oilfield chemicals on sand failure in reservoir rocks. 

    Wuyep, Elizabeth O.; Oluyemi, Gbenga Folorunso; Yates, Kyari; Akisanya, Alfred R. (Elsevier https://doi.org/10.1016/j.petrol.2018.02.041, 2018-02-19)
    WUYEP, E.O., OLUYEMI, G.F., YATES, K. and AKISANYA, A.R. 2018. Geomechanical effects of oilfield chemicals on sand failure in reservoir rocks. Journal of petroleum science and engineering [online], 165, pages 347-357. Available from: https://doi.org/10.1016/j.petrol.2018.02.041
    Sand failure may result in the production of formation sand at the same time the formation fluids are being produced. This work examines the effects of some commonly used oilfield chemicals, specifically, biocide, corrosion ...
  • Mechanical, thermal, and flammability behaviour of low density polyethylene - oil based mud fillers nanocomposites. 

    Siddique, Shohel; Yates, Kyari; Njuguna, James (HTW Berlin, University of Applied Sciences (Organisers), 2018-05-23)
    SIDDIQUE, S., YATES, K. and NJUGUNA, J. 2018. Mechanical, thermal, and flammability behaviour of low density polyethylene - oil based mud fillers nanocomposites. Presented at the 4th International structural nano composites conference 2018 (NANOSTRUC 2018), 23-24 May 2018, Berlin, Germany.
    Novel low density polyethylene (LDPE)/Oil based mud fillers (OBMF) nanocomposites were manufactured by a melt compounding process. Fourier Transform Infrared (FTIR) Spectroscopy was used to characterise the structure of ...
  • Multi-residue analysis of chiral and achiral trace organic contaminants in soil by accelerated solvent extraction and enantioselective liquid chromatography tandem-mass spectrometry. 

    Petrie, Bruce; Mrazova, Jana; Kasprzyk-Hordern, Barbara; Yates, Kyari (Elsevier https://doi.org/10.1016/j.chroma.2018.08.034, 2018-08-19)
    PETRIE, B., MRAZOVA, J., KASPRZYK-HORDERN, B. and YATES, K. 2018. Multi-residue analysis of chiral and achiral trace organic contaminants in soil by accelerated solvent extraction and enantioselective liquid chromatography tandem-mass spectrometry. Journal of chromatography A [online], 1572, pages 62-71. Available from: https://doi.org/10.1016/j.chroma.2018.08.034
    Reported here is the first analytical methodology for the enantiomeric determination of chiral trace organic contaminants (TOrCs) in soil. Direct enantioselective separations were achieved on a Chirobiotic V2® column ...
  • Multivariate analysis of Scotch whisky by total reflection x-ray fluorenscence and chemometric methods: a potential tool in the identification of counterfeits. 

    Shand, Charlie A.; Wendler, Renate; Dawson, Lorna; Yates, Kyari; Stephenson, Hayleigh (Elsevier https://doi.org/10.1016/j.aca.2017.04.041, 2017-05-06)
    SHAND, C.A., WENDLER, R., DAWSON, L., YATES, K. and STEPHENSON, H. 2017. Multivariate analysis of Scotch whisky by total reflection x-ray fluorenscence and chemometric methods: a potential tool in the identification of counterfeits. Analytica chimica acta [online], 976, pages 14-24. Available from: https://doi.org/10.1016/j.aca.2017.04.041
    Most methods used in the identification of counterfeit whisky have focused on the profiling of volatile organic congeners determined by gas chromatography. We tested the use of total reflection x-ray fluorescence (TXRF) ...
  • Oil based drilling fluid waste: an overview on highly reported but less explored sink for environmentally persistent pollutants. 

    Siddique, Shohel; Kwoffie, Lorraine; Addae-Afoakwa, Kofi; Yates, Kyari; Njuguna, James (IOP https://doi.org/10.1088/1757-899X/195/1/012008, 2017-05-11)
    SIDDIQUE, S., KWOFFIE, L., ADDAE-AFOAKWA, K., YATES, K. and NJUGUNA, J. 2016. Oil based drilling fluid waste: an overview on highly reported but less explored sink for environmentally persistent pollutants. IOP conference series: materials science and engineering [online], 195: proceedings of the 3rd structural nano composites conference (NANOSTRUC 2016), 12-15 September 2016, Aberdeen, UK, article ID 012008. Available from: https://doi.org/10.1088/1757-899X/195/1/012008
    Operational discharges of spent drilling fluid, produced water, and accumulated drill cuttings from oil and gas industry are a continuous point source of environmental pollution. To meet the strict environmental standard ...
  • Sand failure: effect of biocide on the geomechanical properties of outcrop carbonate rock under static conditions. 

    Wuyep, Elizabeth O.; Oluyemi, Gbenga Folorunso; Yates, Kyari; Akisanya, Alfred R. (Springer https://doi.org/10.1007/978-3-030-01665-4_43, 2018-12-31)
    WUYEP, E., OLUYEMI, G., YATES, K. and AKISANYA, A. 2019. Sand failure: effect of biocide on the geomechanical properties of outcrop carbonate rock under static conditions. In: Kallel A., Erguler, Z.A., Cui, Z.-D., Karrech, A., Karakus, M., Kulatilake, P. and Shukla, S.K. (eds.) Recent advances in geo-environmental engineering, geomechanics and geotechnics, and geohazards: proceedings of the 1st Springer conference of the Arabian Journal of Geosciences (CAJG-1), 12-15 November 2018, Hammamet, Tunisia. Advances in science, technology and innovation: IEREK interdisciplinary series for sustainable development. Cham: Springer [online], pages 183-185. Available from: https://doi.org/10.1007/978-3-030-01665-4_43
    The effects of chemical interaction of a biocide with formation rocks on the rock geomechanical strength were examined. A combination of analytical tests (Scanning Electron Microscopy/Energy-Dispersive X-Ray Analysis-SEM/EDX, ...
  • Structural and thermal degradation behaviour of reclaimed clay nano-reinforced low density polyethylene nanocomposites. 

    Siddique, Shohel; Smith, Grant David; Yates, Kyari; Mishra, Ajay Kumar; Matthews, Kerr H.; Csetenyi, Laszlo J.; Njuguna, James
    SIDDIQUE, S., SMITH, G.D., YATES, K., MISHRA, A.K., MATTHEWS, K., CSETENYI, L.J. and NJUGUNA, J. [2019]. Structural and thermal degradation behaviour of reclaimed clay nano-reinforced low-density polyethylene nanocomposites. Journal of polymer research [online], (accepted). Available from: https://doi.org/10.1007/s10965-019-1802-9
    In this study, a novel reclaimed clay nanofiller used to manufacture low-density polyethylene (LDPE)/Oil based mud fillers (OBMFs) nanocomposites by a melt compounding process. The mechanical testing samples were manufactured ...
  • Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil. 

    Nwinee, Sarah Ateduobie (Robert Gordon University School of Engineering, 2018-11-30)
    NWINEE, S.A. 2018. Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil. Robert Gordon University, PhD thesis.
    Environmental pollution from oilfield drilling waste poses potential hazards which can lead to ecological imbalance. The predominant pollutant from oilfield waste is petroleum hydrocarbons. Some effects of petroleum ...
  • Thermal stability, flame retardancy and mechanical properties of polyamide/montmorillonite nanocomposites prepared by melt processing. 

    Siddique, Shohel; Yates, Kyari; Njuguna, James (Robert Gordon University (Organisers), 2016-09-12)
    SIDDIQUE, S., YATES, K. and NJUGUNA, J. 2016. Thermal stability, flame retardancy and mechanical properties of polyamide/montmorillonite nanocomposites prepared by melt processing. Presented at the 3rd International structural nano composites conference 2016 (NANOSTRUC 2016), 12-16 September 2016, Aberdeen, UK.
    The increase in thermal stability, flame retardancy, and mechanical properties of Polyamide 6 (PA6)/montmorillonite (MMT) nanocomposites open a new research window in respect to successful technical application of PA6/MMT ...
  • Waste to want: polymer nanocomposites using nanoclays extracted from oil based drilling mud waste. 

    Adegbotolu, Urenna V.; Njuguna, James; Pollard, Pat; Yates, Kyari (IOP Publishing., 2014)
    ADEGBOTOLU, U. V., NJUGUNA, J., POLLARD, P. and YATES, K., 2014. Waste to want: polymer nanocomposites using nanoclays extracted from oil based drilling mud waste. IOP Conference Series: Materials Science and Engineering, 64, pp. 012023.
    Due to the European Union (EU) waste frame work directive (WFD), legislations have been endorsed in EU member states such as UK for the Recycling of wastes with a vision to prevent and reduce landfilling of waste. Spent ...