{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:N72LA7HLMSQD4YZ4HZIYVVMAT4","short_pith_number":"pith:N72LA7HL","canonical_record":{"source":{"id":"1305.7324","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2013-05-31T08:48:43Z","cross_cats_sorted":[],"title_canon_sha256":"9a471e254870ef022cd4cdbaba23198903dcefae212ef94f588f8e2f2b4f7ea4","abstract_canon_sha256":"a533224ec65520b4a9bbfddd56ff0468a5c29da2c9fc60c791a5dc5a370113d6"},"schema_version":"1.0"},"canonical_sha256":"6ff4b07ceb64a03e633c3e518ad5809f2e5eb8a7063514e987628e82e422d2d1","source":{"kind":"arxiv","id":"1305.7324","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.7324","created_at":"2026-05-18T02:50:24Z"},{"alias_kind":"arxiv_version","alias_value":"1305.7324v3","created_at":"2026-05-18T02:50:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.7324","created_at":"2026-05-18T02:50:24Z"},{"alias_kind":"pith_short_12","alias_value":"N72LA7HLMSQD","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"N72LA7HLMSQD4YZ4","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"N72LA7HL","created_at":"2026-05-18T12:27:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:N72LA7HLMSQD4YZ4HZIYVVMAT4","target":"record","payload":{"canonical_record":{"source":{"id":"1305.7324","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2013-05-31T08:48:43Z","cross_cats_sorted":[],"title_canon_sha256":"9a471e254870ef022cd4cdbaba23198903dcefae212ef94f588f8e2f2b4f7ea4","abstract_canon_sha256":"a533224ec65520b4a9bbfddd56ff0468a5c29da2c9fc60c791a5dc5a370113d6"},"schema_version":"1.0"},"canonical_sha256":"6ff4b07ceb64a03e633c3e518ad5809f2e5eb8a7063514e987628e82e422d2d1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:50:24.384849Z","signature_b64":"nw2+lja7i00qXl78eOAaCEMdUCmNNMcQeuyFMPKeoRXvwhVC3ok6Ag3J4S0zmQfHmYpYy0xSkxn2GVpQM+H4CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6ff4b07ceb64a03e633c3e518ad5809f2e5eb8a7063514e987628e82e422d2d1","last_reissued_at":"2026-05-18T02:50:24.384038Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:50:24.384038Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1305.7324","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:50:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WmdVgPJIbcLf7nuJTOB6o/UOEbZ1/FtFKFdRVl3jmVJ/5KfoR0Z0cCdNw8laPlcMWFR1JhVJVJiRP2RaemkHDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:36:37.191536Z"},"content_sha256":"589364e0da6aebbb6660fb6efdd70f9f2d314290b3a4696c56dfd58851b5b32f","schema_version":"1.0","event_id":"sha256:589364e0da6aebbb6660fb6efdd70f9f2d314290b3a4696c56dfd58851b5b32f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:N72LA7HLMSQD4YZ4HZIYVVMAT4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Relevance of electron spin dissipative processes to dynamic nuclear polarization via thermal mixing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.stat-mech","authors_text":"Alberto Rosso, Fabio Tedoldi, Marta Filibian, Pietro Carretta, Sonia Colombo Serra","submitted_at":"2013-05-31T08:48:43Z","abstract_excerpt":"The available theoretical approaches aiming at describing Dynamic Nuclear spin Polarization (DNP) in solutions containing molecules of biomedical interest and paramagnetic centers are not able to model the behaviour observed upon varying the concentration of trityl radicals or the polarization enhancement caused by moderate addition of gadolinium complexes. In this manuscript, we first show experimentally that the nuclear steady state polarization reached in solutions of pyruvic acid with 15 mM trityl radicals is substantially independent from the average internuclear distance. This evidences "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.7324","kind":"arxiv","version":3},"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":"2026-05-18T02:50:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sJ3ipKBv/rFpkgiU5za0LFE+eaHsKtokuHtZEJ2nabw0lFhg1yMk0GsDbEZDMUSEBkbzTNpFAAGwTrc+lsYUCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:36:37.192291Z"},"content_sha256":"e8bd64594d995846a154d612c890a70c82ea3181b7f4942e59d8b6c042bc035a","schema_version":"1.0","event_id":"sha256:e8bd64594d995846a154d612c890a70c82ea3181b7f4942e59d8b6c042bc035a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/N72LA7HLMSQD4YZ4HZIYVVMAT4/bundle.json","state_url":"https://pith.science/pith/N72LA7HLMSQD4YZ4HZIYVVMAT4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/N72LA7HLMSQD4YZ4HZIYVVMAT4/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":"2026-05-31T07:36:37Z","links":{"resolver":"https://pith.science/pith/N72LA7HLMSQD4YZ4HZIYVVMAT4","bundle":"https://pith.science/pith/N72LA7HLMSQD4YZ4HZIYVVMAT4/bundle.json","state":"https://pith.science/pith/N72LA7HLMSQD4YZ4HZIYVVMAT4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/N72LA7HLMSQD4YZ4HZIYVVMAT4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:N72LA7HLMSQD4YZ4HZIYVVMAT4","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":"a533224ec65520b4a9bbfddd56ff0468a5c29da2c9fc60c791a5dc5a370113d6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2013-05-31T08:48:43Z","title_canon_sha256":"9a471e254870ef022cd4cdbaba23198903dcefae212ef94f588f8e2f2b4f7ea4"},"schema_version":"1.0","source":{"id":"1305.7324","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.7324","created_at":"2026-05-18T02:50:24Z"},{"alias_kind":"arxiv_version","alias_value":"1305.7324v3","created_at":"2026-05-18T02:50:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.7324","created_at":"2026-05-18T02:50:24Z"},{"alias_kind":"pith_short_12","alias_value":"N72LA7HLMSQD","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"N72LA7HLMSQD4YZ4","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"N72LA7HL","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:e8bd64594d995846a154d612c890a70c82ea3181b7f4942e59d8b6c042bc035a","target":"graph","created_at":"2026-05-18T02:50:24Z","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 available theoretical approaches aiming at describing Dynamic Nuclear spin Polarization (DNP) in solutions containing molecules of biomedical interest and paramagnetic centers are not able to model the behaviour observed upon varying the concentration of trityl radicals or the polarization enhancement caused by moderate addition of gadolinium complexes. In this manuscript, we first show experimentally that the nuclear steady state polarization reached in solutions of pyruvic acid with 15 mM trityl radicals is substantially independent from the average internuclear distance. This evidences ","authors_text":"Alberto Rosso, Fabio Tedoldi, Marta Filibian, Pietro Carretta, Sonia Colombo Serra","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2013-05-31T08:48:43Z","title":"Relevance of electron spin dissipative processes to dynamic nuclear polarization via thermal mixing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.7324","kind":"arxiv","version":3},"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":"sha256:589364e0da6aebbb6660fb6efdd70f9f2d314290b3a4696c56dfd58851b5b32f","target":"record","created_at":"2026-05-18T02:50:24Z","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":"a533224ec65520b4a9bbfddd56ff0468a5c29da2c9fc60c791a5dc5a370113d6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2013-05-31T08:48:43Z","title_canon_sha256":"9a471e254870ef022cd4cdbaba23198903dcefae212ef94f588f8e2f2b4f7ea4"},"schema_version":"1.0","source":{"id":"1305.7324","kind":"arxiv","version":3}},"canonical_sha256":"6ff4b07ceb64a03e633c3e518ad5809f2e5eb8a7063514e987628e82e422d2d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6ff4b07ceb64a03e633c3e518ad5809f2e5eb8a7063514e987628e82e422d2d1","first_computed_at":"2026-05-18T02:50:24.384038Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:50:24.384038Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nw2+lja7i00qXl78eOAaCEMdUCmNNMcQeuyFMPKeoRXvwhVC3ok6Ag3J4S0zmQfHmYpYy0xSkxn2GVpQM+H4CA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:50:24.384849Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.7324","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:589364e0da6aebbb6660fb6efdd70f9f2d314290b3a4696c56dfd58851b5b32f","sha256:e8bd64594d995846a154d612c890a70c82ea3181b7f4942e59d8b6c042bc035a"],"state_sha256":"3611387b19254531c9209599709120d3e913b26732ad1643203c18912fff6e1e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mFlo4O+xjCbFSCvc8GEXTaSYEOskFxzOLV0GnrqZhYk8fW3Ks12cERpHdrtF12pxZh/xBg3/Ql4AxSGePDQDCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T07:36:37.195764Z","bundle_sha256":"0a88a704d8447d4bbbee8a48b1b31a93ac3947696a246037b06a9f75b26b38bf"}}