{
  "annotation_id": "750bf3f5-648d-4ef5-986d-f8f67496b022",
  "date_created": "2026-03-02T18:01:14.866000Z",
  "date_modified": "2026-03-02T18:01:14.866000Z",
  "file_hash": "63fe656a673526c1f9568aa17bf795a3ddbc57e17e1d049ffd93c0d9855da0b9",
  "private": false,
  "record": {
    "abstract": "We report on a new technique which was used to detect single Escherichia coli\nthat is based on the changes in the nonlinear rotation of a magnetic\nmicrosphere driven by an external magnetic field. The presence of one\nEscherichia Coli bacterium on the surface of a 2.0 micron magnetic microsphere\ncaused an easily measurable change in the drag of the system and, therefore, in\nthe nonlinear rotation rate. The straight-forward measurement uses standard\nmicroscopy techniques and the observed average shift in the nonlinear rotation\nrate changed by a factor of ~3.8.",
    "arxiv_id": "physics/0610144",
    "authors": [
      "Brandon H. McNaughton",
      "Rodney R. Agayan",
      "Raoul Kopelman"
    ],
    "categories": [
      "physics.bio-ph"
    ],
    "title": "Dynamic detection of a single bacterium: nonlinear rotation rate shifts   of driven magnetic microsphere stages",
    "url": "https://arxiv.org/abs/physics/0610144"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "da10ec70-952c-4c24-80c5-68986e30e924",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}