{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:CFKSTYCM3ODI6J4IS77CYQFR3A","short_pith_number":"pith:CFKSTYCM","canonical_record":{"source":{"id":"1010.1958","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-10T19:15:46Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"6fe52c46b6422cd5e9cf68023d9fccf1cfd701d5057b75b60f9cf3f3e1967297","abstract_canon_sha256":"30f8dcb2c7c9d4f78fda90803b0014200a2f94bb225f9b0b3f2ed28a835701cc"},"schema_version":"1.0"},"canonical_sha256":"115529e04cdb868f278897fe2c40b1d80f34ce883327d5fd1c65213688b26839","source":{"kind":"arxiv","id":"1010.1958","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1958","created_at":"2026-05-18T02:05:07Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1958v1","created_at":"2026-05-18T02:05:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1958","created_at":"2026-05-18T02:05:07Z"},{"alias_kind":"pith_short_12","alias_value":"CFKSTYCM3ODI","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"CFKSTYCM3ODI6J4I","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"CFKSTYCM","created_at":"2026-05-18T12:26:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:CFKSTYCM3ODI6J4IS77CYQFR3A","target":"record","payload":{"canonical_record":{"source":{"id":"1010.1958","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-10T19:15:46Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"6fe52c46b6422cd5e9cf68023d9fccf1cfd701d5057b75b60f9cf3f3e1967297","abstract_canon_sha256":"30f8dcb2c7c9d4f78fda90803b0014200a2f94bb225f9b0b3f2ed28a835701cc"},"schema_version":"1.0"},"canonical_sha256":"115529e04cdb868f278897fe2c40b1d80f34ce883327d5fd1c65213688b26839","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:05:07.025765Z","signature_b64":"EZoDv8j0l9rRfOBKe1XJ8M4/FK7nesuQA2ndhxcv2Y2GxHpRozEROLhNOVWp+lUAtRAk49G/54a8tMQjnbONBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"115529e04cdb868f278897fe2c40b1d80f34ce883327d5fd1c65213688b26839","last_reissued_at":"2026-05-18T02:05:07.024858Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:05:07.024858Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1010.1958","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:05:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zSOR2tGPHRcRX5ZZHea96oVtBKY1Fh71poRACjWMomT0VymouBfyLUH3FUhXtMahwUZycQWeERfwz1ME0RGTCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:08:13.768922Z"},"content_sha256":"fe769f483d3dcdceba3cde61f0901cdc43d104199b5f2903bb909f1c6150295a","schema_version":"1.0","event_id":"sha256:fe769f483d3dcdceba3cde61f0901cdc43d104199b5f2903bb909f1c6150295a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:CFKSTYCM3ODI6J4IS77CYQFR3A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct observation of a hydrophobic bond in loop-closure of a capped (-OCH2CH2-)n oligomer in water","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.bio-ph"],"primary_cat":"physics.chem-ph","authors_text":"Lawrence R. Pratt, Mangesh I. Chaudhari, Michael E. Paulaitis","submitted_at":"2010-10-10T19:15:46Z","abstract_excerpt":"The small r variation of the probability density P(r) for end-to-end separations of a -CH2CH3 capped (-OCH2CH2-)n oligomer in water is computed to be closely similar to the CH4 ... CH4 potential of mean force under the same circumstances. Since the aqueous solution CH4 ... CH4 potential of mean force is the natural physical definition of a primitive hydrophobic bond, the present result identifies an experimentally accessible circumstance for direct observation of a hydrophobic bond which has not been observed previously because of the low solubility of CH4 in water. The physical picture is tha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1958","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:05:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UzQIy7TvYmWE8CYiygeDoQdVDqPAwgniXvqoBA7ZzrDkSt0dhTOzbiw9gRD8XV5d86+knNiQcdm5FLyWND9/AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:08:13.769583Z"},"content_sha256":"54d62ffb6ed6403c48ed537a25309ce05c5e8df0d3675cd93efd51166f4339b3","schema_version":"1.0","event_id":"sha256:54d62ffb6ed6403c48ed537a25309ce05c5e8df0d3675cd93efd51166f4339b3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CFKSTYCM3ODI6J4IS77CYQFR3A/bundle.json","state_url":"https://pith.science/pith/CFKSTYCM3ODI6J4IS77CYQFR3A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CFKSTYCM3ODI6J4IS77CYQFR3A/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T08:08:13Z","links":{"resolver":"https://pith.science/pith/CFKSTYCM3ODI6J4IS77CYQFR3A","bundle":"https://pith.science/pith/CFKSTYCM3ODI6J4IS77CYQFR3A/bundle.json","state":"https://pith.science/pith/CFKSTYCM3ODI6J4IS77CYQFR3A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CFKSTYCM3ODI6J4IS77CYQFR3A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:CFKSTYCM3ODI6J4IS77CYQFR3A","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":"30f8dcb2c7c9d4f78fda90803b0014200a2f94bb225f9b0b3f2ed28a835701cc","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-10T19:15:46Z","title_canon_sha256":"6fe52c46b6422cd5e9cf68023d9fccf1cfd701d5057b75b60f9cf3f3e1967297"},"schema_version":"1.0","source":{"id":"1010.1958","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1958","created_at":"2026-05-18T02:05:07Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1958v1","created_at":"2026-05-18T02:05:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1958","created_at":"2026-05-18T02:05:07Z"},{"alias_kind":"pith_short_12","alias_value":"CFKSTYCM3ODI","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"CFKSTYCM3ODI6J4I","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"CFKSTYCM","created_at":"2026-05-18T12:26:05Z"}],"graph_snapshots":[{"event_id":"sha256:54d62ffb6ed6403c48ed537a25309ce05c5e8df0d3675cd93efd51166f4339b3","target":"graph","created_at":"2026-05-18T02:05:07Z","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":"The small r variation of the probability density P(r) for end-to-end separations of a -CH2CH3 capped (-OCH2CH2-)n oligomer in water is computed to be closely similar to the CH4 ... CH4 potential of mean force under the same circumstances. Since the aqueous solution CH4 ... CH4 potential of mean force is the natural physical definition of a primitive hydrophobic bond, the present result identifies an experimentally accessible circumstance for direct observation of a hydrophobic bond which has not been observed previously because of the low solubility of CH4 in water. The physical picture is tha","authors_text":"Lawrence R. Pratt, Mangesh I. Chaudhari, Michael E. Paulaitis","cross_cats":["physics.bio-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-10T19:15:46Z","title":"Direct observation of a hydrophobic bond in loop-closure of a capped (-OCH2CH2-)n oligomer in water"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1958","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:fe769f483d3dcdceba3cde61f0901cdc43d104199b5f2903bb909f1c6150295a","target":"record","created_at":"2026-05-18T02:05:07Z","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":"30f8dcb2c7c9d4f78fda90803b0014200a2f94bb225f9b0b3f2ed28a835701cc","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2010-10-10T19:15:46Z","title_canon_sha256":"6fe52c46b6422cd5e9cf68023d9fccf1cfd701d5057b75b60f9cf3f3e1967297"},"schema_version":"1.0","source":{"id":"1010.1958","kind":"arxiv","version":1}},"canonical_sha256":"115529e04cdb868f278897fe2c40b1d80f34ce883327d5fd1c65213688b26839","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"115529e04cdb868f278897fe2c40b1d80f34ce883327d5fd1c65213688b26839","first_computed_at":"2026-05-18T02:05:07.024858Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:05:07.024858Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EZoDv8j0l9rRfOBKe1XJ8M4/FK7nesuQA2ndhxcv2Y2GxHpRozEROLhNOVWp+lUAtRAk49G/54a8tMQjnbONBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:05:07.025765Z","signed_message":"canonical_sha256_bytes"},"source_id":"1010.1958","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fe769f483d3dcdceba3cde61f0901cdc43d104199b5f2903bb909f1c6150295a","sha256:54d62ffb6ed6403c48ed537a25309ce05c5e8df0d3675cd93efd51166f4339b3"],"state_sha256":"a0af7c3f7f96e457aa4beb45556b4a7112490e5702ec4eeb295d361dbeda07f9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kGhmzO8adwEFAjFRanlf5zI5jvtL9wqGK+y0nu1zFujX0cMvj4vtkWwYLYs7Fmu9weZDlLKNRY+icS+YeSFEBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T08:08:13.772831Z","bundle_sha256":"3f2f8dff77347c3365331760ef2a20c1c80ed2ff945269f2a5ded527a44b5329"}}