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CHARACTERIZATION AND EVALUATION OF CORROSION BEHAVIOR OF CONDUCTING POLYMER COMPOSITE COATINGSJEEVAGAN, REBHADEVI 04 September 2003 (has links)
No description available.
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A compositional analysis of Roman and early post-Roman glass and glassworking waste from selected British sites : towards an understanding of the technology of glass-making through analysis by inductively-coupled plasma spectrometry of glass and glass production debris from the Roman/Saxon sites at York, Leicester, Mancetter and WorcesterJackson, Caroline Mary January 1992 (has links)
This study is concerned with the compositional analysis of Roman and early post-Roman glass from both domestic assemblages and the remains derived from glass working and producing sites in Britain, using Inductively Coupled Plasma Spectrometry (ICPS). Samples analysed were from glassworking waste from Mancetter (midsecond century), Leicester (third century) and Worcester (first to third centuries), glass production debris, probably manufactured from the raw materials, in conjuncton with a domestic assemblage, from Coppergate (first to fourth centuries, or possibly later), and a domestic assemblage from Fishergate (spanning both the Roman and immediate post- Roman periods). All the glass analysed was shown to be of a typical and uniform soda-limesilica composition, except for a small number of vessel fragments from York which were higher in calcium. Any compositional differences between blue-green glasses typologically dated either to the Roman or Saxon periods, were found not to be consistent. Analysis of the colourless glass showed that the majority appeared to be actively decolorized using antimony, in conjunction with apparent differences in the compositions of the raw materials, when compared to glass of the same date in other colours. Compositional differences between melted waste from Mancetter, Leicester and Worcester, were apparent, but not to an extent which allowed characterization to be successful. Analysis of glassmelting pots from Coppergate showed some high temperature glassworking (and possibly glassmaking) could have occurred. Other debris, thought to be indicative of glassmaking was also analysed and compared to the composition of the Roman domestic assemblage.
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A compositional analysis of Roman and early post-Roman glass and glassworking waste from selected British sites. Towards an understanding of the technology of glass-making through analysis by inductively-coupled plasma spectrometry of glass and glass production debris from the Roman/Saxon sites at York, Leicester, Mancetter and Worcester.Jackson, Caroline Mary January 1992 (has links)
This study is concerned with the compositional analysis of Roman and
early post-Roman glass from both domestic assemblages and the remains derived from
glass working and producing sites in Britain, using Inductively Coupled Plasma
Spectrometry (ICPS).
Samples analysed were from glassworking waste from Mancetter (midsecond
century), Leicester (third century) and Worcester (first to third centuries), glass
production debris, probably manufactured from the raw materials, in conjuncton with a
domestic assemblage, from Coppergate (first to fourth centuries, or possibly later), and
a domestic assemblage from Fishergate (spanning both the Roman and immediate post-
Roman periods).
All the glass analysed was shown to be of a typical and uniform soda-limesilica
composition, except for a small number of vessel fragments from York which were
higher in calcium. Any compositional differences between blue-green glasses
typologically dated either to the Roman or Saxon periods, were found not to be
consistent.
Analysis of the colourless glass showed that the majority appeared to be
actively decolorized using antimony, in conjunction with apparent differences In the
compositions of the raw materials, when compared to glass of the same date in other
0 colours.
Compositional differences between melted waste from Mancetter, Leicester
and Worcester, were apparent, but not to an extent which allowed characterization to be
successful.
Analysis of glassmelting pots from Coppergate showed some high
temperature glassworking (and possibly glassmaking) could have occurred. Other debris,
thought to be indicative of glassmaking was also analysed and compared to the
composition of the Roman domestic assemblage.
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Determination of the mineral composition of water and soil samples from Tshipise thermal spring, Mphephu thermal spring and Siloam borehole using inductively coupled plasma mass spectrometry and x-ray fluorescence spectrometryDube - Johnstone, Nhlalo Michael 17 May 2019 (has links)
MSc (Chemistry / Department of Chemistry / In this study, three sampling sites (Tshipise thermal spring, Mphephu thermal spring
and Siloam borehole) in Limpopo Province South Africa were considered for an
investigation into the mineral composition of their water and soil samples. Tshipise
and Mphephu thermal springs are well developed and located within tourist resorts.
On the other hand, Siloam is a borehole on the grounds of a private household. The
water is used for various domestic purposes such as laundry, general cleaning of the
household and bathing. Water and soil samples from the three sites were collected
once per week every week in February 2018. The sampling bottles were spiked with
1M HNO3 before sampling to keep any metal ions present in the water samples in
solution. The soil and water samples were analysed for their chemical composition
using X-ray fluorescence (XRF) and inductively coupled plasma mass spectrometry
(ICP-MS) respectively. XRF analysis of the soil samples found many major oxides of
which SiO2 made up 63.67%, 85.37% and 46.28% by mass of Tshipise, Mphephu
and Siloam soil samples respectively. XRF analysis also showed the presence of
dangerous levels of heavy metals such as As, Tl, Pb and V. The analysis of the
water samples by ICP-MS found that Tshipise, Mphephu and Siloam mineral water
were soft, soft-moderately hard and soft-hard respectively with regards to the water
hardness scale according to the United States Geological Survey (USGS) and the
Water Quality Association (WQA). Analysis of water samples also found the
presence of As, Cd, Cr and V. Arsenic was found to occur at concentrations above
the Maximum Allowable Concentration (MAC) set by the World Health Organisation
(WHO) (10 μg L-1) for Tshipise, Mphephu and Siloam mineral water (13.63 μg L-1,
15.83 μg L-1 and 20.97 μg L-1 respectively). Water temperatures for the three sites
ranged from 38°C (Siloam borehole) to 64°C (Tshipise thermal spring). The pH
values were 7.25 (Siloam borehole), 7.40 (Mphephu thermal spring) and 8.67
(Tshipise thermal spring). Due to the presence of As, Tl, Pb, V, Cd and Cr, the
mineral water from all three thermal springs is unsafe to consume as it would lead to
serious negative health effects some of which are outlined in this study. / NRF
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