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Sökning: WFRF:(Hook H.) > (2005-2009)

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  • Arvidsson, Per, et al. (författare)
  • Exploring the Antibacterial and Hemolytic Activity of Shorter- and Longer-Chain B-, a,B-, and y-Peptides, and of B-Peptides from B2-3-Aza- and B3-2-Methylidene-amino Acids Bearing Proteinogenic Side Chains - A Survey
  • 2005
  • Ingår i: Chemistry & Biodiversity. ; 2, s. 401-420
  • Tidskriftsartikel (refereegranskat)abstract
    • The antibacterial activities of 31 different b-, mixed a/B-, and y-peptides, as well as of B-peptides derived from B2-3-aza- and B3-2-methylidene-amino acids were assayed against six pathogens (Enterococcus faecails, STaphylococcus aureus, Streptococcus pneumoniae, Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa), and the results were compared with literature data. The interaction of these peptides with mammalian cells, as modeled by measuring the hemolysis of human erythrocytes, was also investigated. In addition to those peptides designed to fold into amphiphilic helical conformations with positive charges on one face of the helix, one new peptide with hemolytic activity was detected within the sample set. Moreover, it was demontrated that neither cationic peptides used for membrane translocation (B3-oligoarginines), nor mixeda/B- or y-peptides with somatostatin-mimicking activities display unwanted hemolytic activity.
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3.
  • Rubin, D., et al. (författare)
  • Looking Beyond Lambda with the Union Supernova Compilation
  • 2009
  • Ingår i: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 695, s. 391-403
  • Tidskriftsartikel (refereegranskat)abstract
    • The recent robust and homogeneous analysis of the world's supernova distance-redshift data, together with cosmic microwave background and baryon acoustic oscillation data—provides a powerful tool for constraining cosmological models. Here we examine particular classes of scalar field, modified gravity, and phenomenological models to assess whether they are consistent with observations even when their behavior deviates from the cosmological constant Λ. Some models have tension with the data, while others survive only by approaching the cosmological constant, and a couple are statistically favored over Λ cold dark matter. Dark energy described by two equation-of-state parameters has considerable phase space to avoid Λ and next-generation data will be required to constrain such physics, with the level of complementarity between probes varying with cosmology.
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