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Sökning: WFRF:(Burg D.) > Kungliga Tekniska Högskolan

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  • Kehoe, Laura, et al. (författare)
  • Make EU trade with Brazil sustainable
  • 2019
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 364:6438, s. 341-
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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4.
  • Siddiqui, K. S., et al. (författare)
  • A chemically modified α-amylase with a molten-globule state has entropically driven enhanced thermal stability
  • 2010
  • Ingår i: Protein Engineering Design & Selection. - : Oxford University Press (OUP). - 1741-0126 .- 1741-0134. ; 23:10, s. 769-780
  • Tidskriftsartikel (refereegranskat)abstract
    • The thermostability properties of TAA were investigated by chemically modifying carboxyl groups on the surface of the enzyme with AMEs. The TAAMOD exhibited a 200 improvement in starch-hydrolyzing productivity at 60°C. By studying the kinetic, thermodynamic and biophysical properties, we found that TAAMOD had formed a thermostable, MG state, in which the unfolding of the tertiary structure preceded that of the secondary structure by at least 20°C. The X-ray crystal structure of TAAMOD revealed no new permanent interactions (electrostatic or other) resulting from the modification. By deriving thermodynamic activation parameters of TAAMOD, we rationalised that thermostabilisation have been caused by a decrease in the entropy of the transition state, rather than being enthalpically driven. Far-UV CD shows that the origin of decreased entropy may have arisen from a higher helical content of TAAMOD. This study provides new insight into the intriguing properties of an MG state resulting from the chemical modification of TAA.
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5.
  • van der Burg, D., et al. (författare)
  • Method development for mono- and disaccharides monitoring in cell culture medium by capillary and microchip electrophoresis
  • 2022
  • Ingår i: Electrophoresis. - : Wiley. - 0173-0835 .- 1522-2683. ; 43:9-10, s. 922-929
  • Tidskriftsartikel (refereegranskat)abstract
    • The rapidly growing, competitive biopharmaceutical market requires tight bioprocess monitoring. An integrated, automated platform for the routine online/at-line monitoring of key factors in the cell culture medium could greatly improve process monitoring. Mono- and disaccharides, as the main energy and carbon source, are one of these key factors. A CE-LIF method was developed for the analysis of several mono- and disaccharides, considering requirements and restrictions for analysis in an integrated, automated monitoring platform, such as the possibility for miniaturization to microchip electrophoresis. Analysis was performed after fluorescent derivatization with 8-aminopyrene-1,3,6-trisulfonic acid. The derivatisation reaction and the separation BGE were optimized using design of experiments. The developed method is applicable to the complex matrix of cell culture medium and proved transferable to microchip electrophoresis.
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  • Resultat 1-5 av 5

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