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Browsing by Author "Theocharis, Charis R."

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    • Article  

      Adsorption of nitrogen and water vapour by activated Kevlar® chars 

      Freeman, J. J.; Tomlinson, J. B.; Sing, K. S. W.; Theocharis, Charis R. (1993)
      Fibrous activated carbons were prepared from Kevlar® (i.e. poly (p-phenylene terephthalamide), in the form of a commercially available woven textile. The cloth was carbonised in nitrogen and activated in either steam or ...

    • Article  

      Adsorption of nitrogen and water vapour by activated Nomex® chars 

      Freeman, J. J.; Tomlinson, J. B.; Sing, K. S. W.; Theocharis, Charis R. (1995)
      Fibrous activated carbons were prepared from Nomex® poly(m-phenylene isophthalamide), in the form of a commercially available woven textile. After carbonisation in nitrogen and activation in either carbon dioxide or steam ...

    • Article  

      The adsorption of water vapour by microporous solids 

      Carrott, P. J. M.; Kenny, M. B.; Roberts, R. A.; Sing, K. S. W.; Theocharis, Charis R. (1991)
      The adsorption of water vapour has been studied with a range of microporous carbons, zeolites and aluminophosphates in order to elucidate the relative influence of surface chemistry, pore size and pore shape upon the form ...

    • Article  

      The adsorption of water vapour by VPI-5, a large pore molecular sieve 

      Kenny, M. B.; Sing, K. S. W.; Theocharis, Charis R. (1991)
      The framework of VPI-5, the first molecular sieve having uniform pores larger than 1 nm diameter, is modified during removal of the zeolitic water

    • Article  

      Adsorptive properties and stability of VPI-5, a large-pore molecular sieve 

      Kenny, M. B.; Sing, K. S. W.; Theocharis, Charis R. (1992)
      The unusual adsorptive properties and the reported instability of VPI-5 have been investigated in some detail. The VPI-5 framework was found to undergo an irreversible but incomplete phase transformation to AlPO4-8 during ...

    • Article  

      Adsorptive Properties of Microporous Zro2 Gels 

      Ragai, J.; Selim, S.; Sing, K. S. W.; Theocharis, Charis R. (1993)
      Nitrogen adsorption studies were carried out on zirconia gels prepared through the agency of ammonium carbonate to zirconyl chloride solutions. The effect of heat treatment and cation uptake on the textural characteristics ...

    • Conference Object  

      An AFM Study of the Synthesis of Modified Porous Titania and Ceria 

      Papatryfonos, C.A.; Theocharis, Charis R. (2018)

    • Article  

      The anomalous sorptive behaviour of Zsm-5 and silicalite-I: Observation of low-pressure hysteresis in nitrogen adsorption 

      Kyriakou, Georgia; Theocharis, Charis R. (2002)
      A first stage of a systematic study of the nature of the low-pressure hysteresis loop observed in the nitrogen adsorption isotherms of some MFI zeolites is presented. It was shown that the pressure at which occurrence of ...

    • Article  

      Authenticity of cypriot sweet wine commandaria using FT-IR and chemometrics 

      Ioannou-Papayianni, Elena; Kokkinofta, Rebecca I.; Theocharis, Charis R. (2011)
      FT-IR spectra of 65 sweet wines produced in Cyprus and other countries were determined, in order to study the authenticity and uniqueness of the Cypriot traditional wine "Commandaria" that is produced from sun-dried grapes. ...

    • Article  

      Authenticity of the traditional Cypriot spirit "zivania" on the basis of 1H NMR spectroscopy diagnostic parameters and statistical analysis 

      Petrakis, Panos V.; Touris, Ioannis; Liouni, Maria; Zervou, Maria; Kyrikou, Ioanna; Kokkinofta, Rebecca I.; Theocharis, Charis R.; Mavromoustakos, Thomas M. (2005)
      A previous publication (Kokkinofta et al. J. Agric. Food Chem. 2003, 51, 6233-6239) discussed the use of inductively coupled plasma spectroscopy to differentiate between the traditional Cypriot alcoholic beverage zivania ...

    • Article  

      Authenticity of the traditional Cypriot spirit "zivania" on the basis of metal content using a combination of coupled plasma spectroscopy and statistical analysis 

      Kokkinofta, Rebecca I.; Petrakis, Panos V.; Mavromoustakos, Thomas M.; Theocharis, Charis R. (2003)
      Sixty-eight alcoholic beverages ranging in alcoholic degree between 40 and 55 from different countries were analyzed for their 16 most abundant metal elements using inductively coupled plasma (ICP) spectroscopy. The results ...

    • Article  

      Changes in the surface properties of calcium hydroxide upon ageing A spectroscopic and gas sorption study 

      Theocharis, Charis R.; Yeates, D. (1991)
      The surface chemistry of commercial grade calcium hydroxide was studied by sorption methods, thermal analysis and spectroscopy. In this paper, the effect of exposure to the atmosphere (moisture and carbon dioxide) upon the ...

    • Article  

      Characterization of microporous zirconia gels 

      Ragai, J.; Selim, S.; Sing, K. S. W.; Theocharis, Charis R. (1994)
      Microporous zirconia gels were prepared from zirconyl chloride by the reaction in aqueous solutions with either ammonium carbonate or bircarbonate. Under conditions of low pH the ammonium bicarbonate precipitated gels ...

    • Article  

      Characterization of the traditional Cypriot spirit Zivania by means of Counterpropagation Artificial Neural Networks 

      Ballabio, D.; Kokkinofta, Rebecca I.; Todeschini, R.; Theocharis, Charis R. (2007)
      Multivariate chemometric techniques, such as Principal Component Analysis and Discriminant Analysis, were previously used to determine the authenticity of the Cypriot traditional spirit Zivania, but these techniques revealed ...

    • Article  

      Chemometric characterization of the cypriot spirit "Zivania" 

      Kokkinofta, Rebecca I.; Theocharis, Charis R. (2005)
      In 42 alcoholic beverages produced in Cyprus and other countries, 26 chemical and physical-chemical variables were determined by HPLC and GC chromatography, 1H NMR and ICP spectroscopy, and other techniques. Data were ...

    • Article  

      Co-ordination polymers based on 2,5-dibenzylidenecyclopentanone, which are photochemically cross-linkable 

      Theocharis, Charis R. (1987)
      2,5-Bis(2,3-dihydroxybenzylidene)cyclopentanone is topochemically photodimerisable, and i.r. spectroscopic evidence suggests that its packing mode on co-ordination to various metal ions is modified

    • Article  

      Control of the morphology of crystalline calcium hydroxide 

      Theocharis, Charis R.; Pashalidis, Ioannis; Jordan, Stephanie L.; Gray, A. C.; Yeates, D. (2001)
      The reaction of solid calcium hydroxide with liquid or gaseous methanol, ethanol and toluene, and the effect this has on the surface properties of the solid was examined, as well as the modification of crystal habit by the ...

    • Article  

      Crystal and molecular structure of 1,3-dibenzylcyclobutane-2,4-bis(2′-spiro-(5′-p-chloro)-benzylcyclopentanone): Product of a single-crystal→single-crystal reaction 

      Jones, W.; Theocharis, Charis R. (1984)
      The title compound is the product of the photo-induced solid-state reaction of 2-(p-chloro)-benzyl-5-benzylidenecyclopentanone, a reaction which is shown to occur in a single-crystal to single-crystal fashion. The cell ...

    • Article  

      Crystal and molecular structures of 2-(p-methylbenzyl)- and 2-(p-chlorobenzyl)-5-(p-bromobenzylidene)cyclopentanone. Influence of chloro and methyl substitution on solid-state reactivity 

      Theocharis, Charis R.; Jones, W.; Motevalli, M.; Hursthouse, M. B. (1982)
      The crystal structures of the title compounds have been determined as part of an investigation into the factors which may influence the solid-state reactivity of benzylidene cyclopentanones. The p-methyl derivative, which ...

    • Article  

      Crystal engineering of photodimerizable cyclopentanones. Comparison of chloro and methyl substitution as solid-state steering groups 

      Jones, W.; Ramdas, Subramaniam; Theocharis, Charis R.; Thomas, John M.; Thomas, N. W. (1981)
      The interchangability of chloro and methyl groups, insofar as solid-state structure and photoreactivity are concerned, is examined in a family of three pairs of closely related molecules derived from the same parent, ...

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