@prefix this: . @prefix sub: . @prefix np: . @prefix dct: . @prefix nt: . @prefix npx: . @prefix xsd: . @prefix rdfs: . @prefix orcid: . @prefix ns1: . @prefix prov: . @prefix foaf: . sub:Head { this: np:hasAssertion sub:assertion; np:hasProvenance sub:provenance; np:hasPublicationInfo sub:pubinfo; a np:Nanopublication . } sub:assertion { dct:description "the ratio of the speed of light in vacuum to that in a substance."; a , ; rdfs:label "Refractive index"; sub:Materials; . } sub:provenance { sub:assertion prov:wasAttributedTo orcid:0009-0002-2913-1293 . } sub:pubinfo { orcid:0009-0002-2913-1293 foaf:name "Christos Vasileiou" . this: dct:created "2026-01-16T14:59:26.730Z"^^xsd:dateTime; dct:creator orcid:0009-0002-2913-1293; dct:license ; npx:introduces ; npx:wasCreatedAt ; nt:wasCreatedFromProvenanceTemplate ns1:RANwQa4ICWS5SOjw7gp99nBpXBasapwtZF1fIM3H2gYTM; nt:wasCreatedFromPubinfoTemplate , ; nt:wasCreatedFromTemplate . sub:sig npx:hasAlgorithm "RSA"; npx:hasPublicKey "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz1OobdRASd9SftHrLhG905OXjv8DHndvyWzXRJ5EDFPankMSnHZPHK+g2qEeRWdonstt55CLrpTpWsVv9xRtTqPidXHbnWLBXX42iCB+EnZNoKqAVKF5GxkSR38S0uTTq3aeQJbw2kTpx6LMkspmuH95fgAI/lfqPWrxdlI98jIeHQ14UXZpiWmkkvPgC9GVgmwHiG1hB/NCA2fKCOxVodN44OfhAPtkWmPJ40IcGPSalI4HRqgLLI5PabdRk3PiG81cUngmQU1Xk6EapzkRJGenkOlGsC5L4ktEPO6LS9uBMLTMLQDtGtkrcwqg5HmeKv7Ili3vgr3LL8/GaBBOLQIDAQAB"; npx:hasSignature "iyxzJOmkslagJCzQfxk4gbMm1gn9CRg1rphSWoWs1wrRM4AfGWgEtcJnagD5VS2MHX+hSomTfyLj3RJRrMJmv8pNflruKxSGRm5metPIAad5Kq5p/FpzgxDdO1LvYlNTX5jrzVAaZtETWaGHwmVK/13kI3Lb7/E0fK5Tlu/YSADuZi+2oaCcX/UxBiNhooNPlmBW4xl+5b49M7SlV/Ah7zJtdgOC7tMef00RENlnKdfhc/RKBfX1w3RusiMFfrSnylzT3a0S26ZYxRvpl1Np+q8iUQEWH6lsqsg8bhx6FZvUUxGdvL876jmZYW4xvp+NgDbNdRksw743uSgTJGX4ag=="; npx:hasSignatureTarget this:; npx:signedBy orcid:0009-0002-2913-1293 . }