{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:6RWYULMXJZO53YSBVL5ZRABPG3","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"7e7d28c5405d9d74493b0f1ed345ae5f5f6ddfc974c4ed0d49c19fde89c203dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-07-13T02:24:24Z","title_canon_sha256":"f3497dbbb9a265e596fc85b2406016c41a07cf73ead746c3e8cbc22c2f1de135"},"schema_version":"1.0","source":{"id":"1907.06000","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.06000","created_at":"2026-05-17T23:40:42Z"},{"alias_kind":"arxiv_version","alias_value":"1907.06000v1","created_at":"2026-05-17T23:40:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.06000","created_at":"2026-05-17T23:40:42Z"},{"alias_kind":"pith_short_12","alias_value":"6RWYULMXJZO5","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"6RWYULMXJZO53YSB","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"6RWYULMX","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:af3196beb83a81806193379967409952f25a9ed9ef060a8879c87513533990d2","target":"graph","created_at":"2026-05-17T23:40:42Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Magnetic nanoparticles (MNPs) with proper surface functionalization have been extensively applied as labels for magnetic immunoassays, carriers for controlled drug/gene delivery, tracers and contrasts for magnetic imaging, etc. Here, we introduce a new biosensing scheme based on magnetic particle spectroscopy (MPS) and the self-assembly of MNPs to quantitatively detect H1N1 nucleoprotein molecules. MPS monitors the harmonics of oscillating MNPs as a metric for the freedom of rotational motion, thus indicating the bound states of MNPs. These harmonics can be readily collected from nanogram quan","authors_text":"Diqing Su, Jian-Ping Wang, Jinming Liu, Kai Wu, Maxim C-J Cheeran, Renata Saha, Venkatramana D. Krishna","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-07-13T02:24:24Z","title":"Detection of Influenza A Virus Nucleoprotein Through the Self-Assembly of Nanoparticles in Magnetic Particle Spectroscopy-Based Bioassays: A Method for Rapid, Sensitive, and Wash-free Magnetic Immunoassays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.06000","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:17ec4603bfa9401b3859e43052752eae838c7f4143fefaf52f75b31666d11283","target":"record","created_at":"2026-05-17T23:40:42Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"7e7d28c5405d9d74493b0f1ed345ae5f5f6ddfc974c4ed0d49c19fde89c203dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-07-13T02:24:24Z","title_canon_sha256":"f3497dbbb9a265e596fc85b2406016c41a07cf73ead746c3e8cbc22c2f1de135"},"schema_version":"1.0","source":{"id":"1907.06000","kind":"arxiv","version":1}},"canonical_sha256":"f46d8a2d974e5ddde241aafb98802f36c55a087d17b6c02151716da79fd5a53a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f46d8a2d974e5ddde241aafb98802f36c55a087d17b6c02151716da79fd5a53a","first_computed_at":"2026-05-17T23:40:42.719199Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:42.719199Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GbdtykK+QCuWXO4LcP0YjncOUgrB9NZRappUVfVmIr7ko13g4qFGU56J4JC5d1XZRHw8ECIRMetcdNNojUVMAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:42.719840Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.06000","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17ec4603bfa9401b3859e43052752eae838c7f4143fefaf52f75b31666d11283","sha256:af3196beb83a81806193379967409952f25a9ed9ef060a8879c87513533990d2"],"state_sha256":"4d342da754d6f12f2ddea12146b7639f931355a45eef78aa1453f8b004d63560"}