Pith Number

pith:RUOD4DUG

pith:2005:RUOD4DUGDCMF4JUBFVK5XHQ2VI

not attested not anchored not stored refs pending

Chemical and Structural Disorder in Eumelanins - A Possible Explanation for Broad Band Absorbance

B. J. Powell, M. Linh Tran, Paul Meredith

arxiv:q-bio/0506028 v2 · 2005-06-20 · q-bio.BM · physics.bio-ph · physics.chem-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RUOD4DUGDCMF4JUBFVK5XHQ2VI}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T14:50:41.355985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8d1c3e0e8618985e26812d55db9e1aaa11189f6cc1f0ceb11dabb36e690717be

Aliases

arxiv: q-bio/0506028 · arxiv_version: q-bio/0506028v2 · doi: 10.48550/arxiv.q-bio/0506028 · pith_short_12: RUOD4DUGDCMF · pith_short_16: RUOD4DUGDCMF4JUB · pith_short_8: RUOD4DUG

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/RUOD4DUGDCMF4JUBFVK5XHQ2VI \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 8d1c3e0e8618985e26812d55db9e1aaa11189f6cc1f0ceb11dabb36e690717be

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec4aff1d7fa6d4063ea40c5c32ffbf2fb3a9a6abe92443e1bfb8881530964ac6",
    "cross_cats_sorted": [
      "physics.bio-ph",
      "physics.chem-ph"
    ],
    "license": "",
    "primary_cat": "q-bio.BM",
    "submitted_at": "2005-06-20T04:25:36Z",
    "title_canon_sha256": "8e70f44226ef665d9b514cbf3bedf8198b7cfa71e38729a0b5135a182d9552e6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "q-bio/0506028",
    "kind": "arxiv",
    "version": 2
  }
}