{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:ZEVMU5MK63NJO5QQ6YYLCJGYEB","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":"a0c414cab00dff5c9586be35944b2680faf090033834a9b52f4e88b819fefb99","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.QM","submitted_at":"2014-05-17T06:40:13Z","title_canon_sha256":"1143def54376b3ada648837f84e405d304333b21329d8d3b08455762dda466b9"},"schema_version":"1.0","source":{"id":"1405.4357","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.4357","created_at":"2026-05-18T01:55:33Z"},{"alias_kind":"arxiv_version","alias_value":"1405.4357v1","created_at":"2026-05-18T01:55:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.4357","created_at":"2026-05-18T01:55:33Z"},{"alias_kind":"pith_short_12","alias_value":"ZEVMU5MK63NJ","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZEVMU5MK63NJO5QQ","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZEVMU5MK","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:698232b573641c5e8d718892997a745b9f079a576c59318773c640964736b66d","target":"graph","created_at":"2026-05-18T01:55:33Z","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":"A novel portable fluorometer combining the attributes of a smartphone with an easy fit, simple and compact sample chamber fabricated using 3D printing has been developed for pH measurements of environmental water in the field. The results were then compared directly with those obtained using conventional electrode based measurements.","authors_text":"Abbas Jamalipour, John Canning, Md. Arafat Hossain, Peter J. Rutledge, Sandra Ast, Teh Li Yen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.QM","submitted_at":"2014-05-17T06:40:13Z","title":"Lab-in-a-phone: Smartphone-based Portable Fluorometer for pH Field Measurements of Environmental Water"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.4357","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":"sha256:7c1d62b2ea74b9f8b9c5c01ffe021f743b2565dc49bd480ccc369b49ee05cdf4","target":"record","created_at":"2026-05-18T01:55:33Z","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":"a0c414cab00dff5c9586be35944b2680faf090033834a9b52f4e88b819fefb99","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.QM","submitted_at":"2014-05-17T06:40:13Z","title_canon_sha256":"1143def54376b3ada648837f84e405d304333b21329d8d3b08455762dda466b9"},"schema_version":"1.0","source":{"id":"1405.4357","kind":"arxiv","version":1}},"canonical_sha256":"c92aca758af6da977610f630b124d820449124314b7d438c66107a531062522a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c92aca758af6da977610f630b124d820449124314b7d438c66107a531062522a","first_computed_at":"2026-05-18T01:55:33.883702Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:33.883702Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BYsKRvefjSu0bObvCSFWH/w4vFG/BNeLIylkNbCTEQNdg8ajjXVMSiJJK8mVOktKM4dIOA/POFL93KKjWpy2Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:33.884235Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.4357","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7c1d62b2ea74b9f8b9c5c01ffe021f743b2565dc49bd480ccc369b49ee05cdf4","sha256:698232b573641c5e8d718892997a745b9f079a576c59318773c640964736b66d"],"state_sha256":"6c7cbe72f6c1f070b5e305f26382e51061e75c186381e36eb8861e037af63673"}