{
  "annotation_id": "c24a539a-3fda-410b-9cae-9ccc6246e70e",
  "date_created": "2026-03-02T18:00:53.631000Z",
  "date_modified": "2026-03-02T18:00:53.631000Z",
  "file_hash": "539b60d1b45c6f8ce27493af6817195ac79b6aa248d2d5c5838407d4a848cfd1",
  "private": false,
  "record": {
    "abstract": "B-DNA solutions of suitable concentration form left-handed chiral nematic\nphases (cholesterics). Such phases have also been observed in solutions of\nother stiff or semiflexible chiral polymers; magnitude and handedness of the\ncholesteric pitch are uniquely related to the molecular features. In this work\nwe present a theoretical method and a numerical procedure which, starting from\nthe structure of polyelectrolytes, lead to the prediction of the cholesteric\npitch. Molecular expressions for the free energy of the system are obtained on\nthe basis of steric and electrostatic interactions between polymers; the former\nare described in terms of excluded volume, while a mean field approximation is\nused for the latter. Calculations have been performed for 130 bp fragments of\nB-DNA. The theoretical predictions provide an explanation for the experimental\nbehavior, by showing the counteracting role played by shape and charge\nchirality of the molecule.",
    "arxiv_id": "physics/0411203",
    "authors": [
      "F. Tombolato",
      "A. Ferrarini"
    ],
    "categories": [
      "physics.bio-ph",
      "q-bio.BM"
    ],
    "doi": "10.1063/1.1839859",
    "title": "From the double-stranded helix to the chiral nematic phase of B-DNA: a   molecular model",
    "url": "https://arxiv.org/abs/physics/0411203"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6e94cfa0-971b-4ac1-ae54-3f6b9486224d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}