Browsing Ciències Bàsiques by Subject "Pinces òptiques"

Now showing items 1-3 of 3

    • Counter-propagating dual-trap optical tweezers based on linear momentum conservation 

      Ribezzi-Crivellari, M.; Huguet Casades, Josep Maria; Ritort, F. (Review of Scientific Instruments, 2013)
      We present a dual-trap optical tweezers setup which directly measures forces using linear momentum conservation. The setup uses a counter-propagating geometry, which allows momentum measurement on each ...

    • Measurement of work in single-molecule pulling experiments 

      Mossa, Alessandro; de Lorenzo, Sara; Huguet Casades, Josep Maria; Ritort, Felix (The Journal of Chemical Physics, 2009)
      A main goal of single-molecule experiments is to evaluate equilibrium free energy differences by applying fluctuation relations to repeated work measurements along irreversible processes. We quantify ...

    • Single-molecule derivation of salt dependent base-pair free energies in DNA 

      Huguet Casades, Josep Maria (Proceedings of the National Academy of Sciences., 2010)
      Accurate knowledge of the thermodynamic properties of nucleic acids is crucial to predicting their structure and stability. To date most measurements of base-pair free energies in DNA are obtained in ...