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Träfflista för sökning "WFRF:(Rennie Adrian R. 1957 ) srt2:(2019)"

Search: WFRF:(Rennie Adrian R. 1957 ) > (2019)

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1.
  • Cockcroft, Jeremy K., et al. (author)
  • Understanding the structure and dynamics of cationic surfactants from studies of pure solid phases
  • 2019
  • In: Physical Chemistry, Chemical Physics - PCCP. - : Royal Society of Chemistry (RSC). - 1463-9076 .- 1463-9084. ; 21:47, s. 25945-25951
  • Journal article (peer-reviewed)abstract
    • A homologous series of n-alkyl trimethylammonium bromide surfactants, H(CH2)(n)N+(CH3)(3) Br-, from C(10)TAB to C(18)TAB have been studied systematically in the bulk over a wide range of temperatures. Common features in the structures are identified, with packing dominated by the co-ordination of the cationic head groups with bromide anions and interdigitation of the hydrocarbon chains. This arrangement provides an explanation for the thin adsorbed bilayers that have been observed at various hydrophilic surfaces from aqueous solutions in previous studies. The molecular volumes and arrangement are comparable with structures of a number of different self-assembled amphiphiles. For these surfactants with bromide counter-ions, formation of crystal hydrates was not observed. The alkyl chains are highly mobile and at high temperatures a plastic phase is found for all materials with a transition enthalpy that is similar to the melting enthalpy of many long alkyl chains. Other unexpected phase transitions depend more markedly on the hydrocarbon chain length and evidently depend on delicate balances of the various contributions to the free energy.
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2.
  • Nouhi, Shirin, et al. (author)
  • Comparative study of flocculation and adsorption behaviour of water treatment proteins from Moringa peregrina and Moringa oleifera seeds
  • 2019
  • In: Scientific Reports. - : Nature Publishing Group. - 2045-2322. ; 9
  • Journal article (peer-reviewed)abstract
    • Trees of Moringa oleifera are the most widely exploited species of Moringa and proteins extracted from its seeds have been identified as the most efficient natural coagulant for water purification. Largely for climatic reasons, other Moringa species are more accessible in some regions and this paper presents a comparative study of the adsorption to different materials of the proteins extracted from seeds of Moringa peregrina and Moringa oleifera to explore their use as flocculating agents in regions where each is more readily accessible. Results showed that Moringa peregrina seed proteins had higher adsorption to alumina compared to silica, in contrast to opposite behavior for Moringa oleifera. Both species provide cationic proteins that can act as effective coagulants for the various impurities with different surface potential. Despite the considerable similarity of the amino acid composition, the seed proteins have significantly different adsorption and this presents the opportunity to improve processes by choosing the optimal species or combination of species depending on the type of impurity or possible development of separation processes.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Rennie, Adrian R., 1 ... (2)
Gutfreund, Philipp (1)
Wu, Han (1)
Cockcroft, Jeremy K. (1)
Shamsabadi, Andre (1)
Kwaambwa, Habauka M. (1)
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Nouhi, Shirin (1)
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University
Uppsala University (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)
Year
2019 (2)Undo refine

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