{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:TELFNLQ6DOALPEFL7BA7JNVSBD","short_pith_number":"pith:TELFNLQ6","canonical_record":{"source":{"id":"1805.00234","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-05-01T08:34:37Z","cross_cats_sorted":[],"title_canon_sha256":"6955ccfa1beccac4243e317c4075820bc03a29bd16a2c8ea7dff99e8acc0e2e9","abstract_canon_sha256":"8e7f1ac6eea6a8575ccff8bfc07b1fed3f686bb92cec91414a9d5d8f9c530160"},"schema_version":"1.0"},"canonical_sha256":"991656ae1e1b80b790abf841f4b6b208fdc7c6d04c73512f0cd89a9fdbb82007","source":{"kind":"arxiv","id":"1805.00234","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00234","created_at":"2026-05-18T00:16:15Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00234v1","created_at":"2026-05-18T00:16:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00234","created_at":"2026-05-18T00:16:15Z"},{"alias_kind":"pith_short_12","alias_value":"TELFNLQ6DOAL","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"TELFNLQ6DOALPEFL","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"TELFNLQ6","created_at":"2026-05-18T12:32:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:TELFNLQ6DOALPEFL7BA7JNVSBD","target":"record","payload":{"canonical_record":{"source":{"id":"1805.00234","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-05-01T08:34:37Z","cross_cats_sorted":[],"title_canon_sha256":"6955ccfa1beccac4243e317c4075820bc03a29bd16a2c8ea7dff99e8acc0e2e9","abstract_canon_sha256":"8e7f1ac6eea6a8575ccff8bfc07b1fed3f686bb92cec91414a9d5d8f9c530160"},"schema_version":"1.0"},"canonical_sha256":"991656ae1e1b80b790abf841f4b6b208fdc7c6d04c73512f0cd89a9fdbb82007","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:15.797438Z","signature_b64":"hn2nNC7TlJHNfPrv5sBjLPo06hLX6HyjwgwNr/1D/uzk6pSvHYml+bwU/8nVF6/b2+XV1yWgvsqwHweo6TEGBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"991656ae1e1b80b790abf841f4b6b208fdc7c6d04c73512f0cd89a9fdbb82007","last_reissued_at":"2026-05-18T00:16:15.796824Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:15.796824Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.00234","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":"2026-05-18T00:16:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"afMqSB7RV/joLoV2+QJEM8/GEXNnNcDNaPLD0c9cpqD+vuEj9nbUFH4HPpT0fuAU//M1+31tLe7ayKcLmeFeDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:37:58.237058Z"},"content_sha256":"ad0aae5965882fb6a8ee9c328868f09c263fcb5f8ce395822f4351f165422f89","schema_version":"1.0","event_id":"sha256:ad0aae5965882fb6a8ee9c328868f09c263fcb5f8ce395822f4351f165422f89"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:TELFNLQ6DOALPEFL7BA7JNVSBD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental and theoretical studies on the photodegradation of 2-ethylhexyl 4-methoxycinnamate in the presence of reactive oxygen and chlorine species","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Alicja Gackowska, Jerzy Gaca, Maciej Przyby{\\l}ek, Waldemar Studzi\\'nski","submitted_at":"2018-05-01T08:34:37Z","abstract_excerpt":"2-Ethylhexyl 4-methoxycinnamate (EHMC) is one of the most commonly used sunscreen ingredient. In this study we investigated photodegradation of EHMC in the presence of such common oxidizing and chlorinating systems as H2O2, H2O2/HCl, H2O2/UV, and H2O2/HCl/UV. Reaction products were detected by gas chromatography with a mass spectrometric detector (GC-MS). As a result of experimental studies chloro-substituted 4-methoxycinnamic acid (4-MCA), 4-methoxybenzaldehyde (4-MBA) and 4-methoxyphenol (4-MP) were identified. Experimental studies were enriched with DFT and MP2 calculations. We found that r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00234","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":"2026-05-18T00:16:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BhrbwjGUjq64v7eqy+p+wuKPqxBMi7jq1TAfDnFhIaDIL3H42JfVu6R8q8iYgWTJhJSAWU9cR8Hj/uq0k3y7Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:37:58.237422Z"},"content_sha256":"ef1f54dafc351f8421f29d08495e04a61b183abdc71a7879f0218f9b986ba1ca","schema_version":"1.0","event_id":"sha256:ef1f54dafc351f8421f29d08495e04a61b183abdc71a7879f0218f9b986ba1ca"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TELFNLQ6DOALPEFL7BA7JNVSBD/bundle.json","state_url":"https://pith.science/pith/TELFNLQ6DOALPEFL7BA7JNVSBD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TELFNLQ6DOALPEFL7BA7JNVSBD/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":"2026-06-02T21:37:58Z","links":{"resolver":"https://pith.science/pith/TELFNLQ6DOALPEFL7BA7JNVSBD","bundle":"https://pith.science/pith/TELFNLQ6DOALPEFL7BA7JNVSBD/bundle.json","state":"https://pith.science/pith/TELFNLQ6DOALPEFL7BA7JNVSBD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TELFNLQ6DOALPEFL7BA7JNVSBD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:TELFNLQ6DOALPEFL7BA7JNVSBD","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":"8e7f1ac6eea6a8575ccff8bfc07b1fed3f686bb92cec91414a9d5d8f9c530160","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-05-01T08:34:37Z","title_canon_sha256":"6955ccfa1beccac4243e317c4075820bc03a29bd16a2c8ea7dff99e8acc0e2e9"},"schema_version":"1.0","source":{"id":"1805.00234","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00234","created_at":"2026-05-18T00:16:15Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00234v1","created_at":"2026-05-18T00:16:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00234","created_at":"2026-05-18T00:16:15Z"},{"alias_kind":"pith_short_12","alias_value":"TELFNLQ6DOAL","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"TELFNLQ6DOALPEFL","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"TELFNLQ6","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:ef1f54dafc351f8421f29d08495e04a61b183abdc71a7879f0218f9b986ba1ca","target":"graph","created_at":"2026-05-18T00:16:15Z","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":"2-Ethylhexyl 4-methoxycinnamate (EHMC) is one of the most commonly used sunscreen ingredient. In this study we investigated photodegradation of EHMC in the presence of such common oxidizing and chlorinating systems as H2O2, H2O2/HCl, H2O2/UV, and H2O2/HCl/UV. Reaction products were detected by gas chromatography with a mass spectrometric detector (GC-MS). As a result of experimental studies chloro-substituted 4-methoxycinnamic acid (4-MCA), 4-methoxybenzaldehyde (4-MBA) and 4-methoxyphenol (4-MP) were identified. Experimental studies were enriched with DFT and MP2 calculations. We found that r","authors_text":"Alicja Gackowska, Jerzy Gaca, Maciej Przyby{\\l}ek, Waldemar Studzi\\'nski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-05-01T08:34:37Z","title":"Experimental and theoretical studies on the photodegradation of 2-ethylhexyl 4-methoxycinnamate in the presence of reactive oxygen and chlorine species"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00234","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:ad0aae5965882fb6a8ee9c328868f09c263fcb5f8ce395822f4351f165422f89","target":"record","created_at":"2026-05-18T00:16:15Z","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":"8e7f1ac6eea6a8575ccff8bfc07b1fed3f686bb92cec91414a9d5d8f9c530160","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-05-01T08:34:37Z","title_canon_sha256":"6955ccfa1beccac4243e317c4075820bc03a29bd16a2c8ea7dff99e8acc0e2e9"},"schema_version":"1.0","source":{"id":"1805.00234","kind":"arxiv","version":1}},"canonical_sha256":"991656ae1e1b80b790abf841f4b6b208fdc7c6d04c73512f0cd89a9fdbb82007","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"991656ae1e1b80b790abf841f4b6b208fdc7c6d04c73512f0cd89a9fdbb82007","first_computed_at":"2026-05-18T00:16:15.796824Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:15.796824Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hn2nNC7TlJHNfPrv5sBjLPo06hLX6HyjwgwNr/1D/uzk6pSvHYml+bwU/8nVF6/b2+XV1yWgvsqwHweo6TEGBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:15.797438Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.00234","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ad0aae5965882fb6a8ee9c328868f09c263fcb5f8ce395822f4351f165422f89","sha256:ef1f54dafc351f8421f29d08495e04a61b183abdc71a7879f0218f9b986ba1ca"],"state_sha256":"dcc4b3f03a807246473f45d8dcd3c3d20307b1c8307d3013119b26a3abdef127"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j6ClLwari+DJ0/kTVjkrECagSvM1P79TKbwzCw2UA1Dh4OcgqUFDxFo+hsric9xr/pqSip6O89lRlbc2FMPcBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T21:37:58.239375Z","bundle_sha256":"de0671cb2f6e1e39f9be7a489d1d4867223caa1f96f586621ca9fe4c94d9949a"}}