{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-81GC8T8Q/47e703c0-c775-4078-b883-f3aa63df2ff7/HTML","dcterms:extent":"38 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-81GC8T8Q/a9f4ea70-0bf4-4a8e-bb45-1e8dd68c0404/PDF","dcterms:extent":"144 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-81GC8T8Q/5ee8cf44-1319-40a8-8fba-bb60fc4fef64/TEXT","dcterms:extent":"36 KB"}],"edm:TimeSpan":{"@rdf:about":"1998-2025","edm:begin":{"@xml:lang":"en","#text":"1998"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:doc-81GC8T8Q","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-KC6O72BG"},{"@xml:lang":"sl","#text":"Acta chimica slovenica"}],"dcterms:issued":"2006","dc:creator":["Perdih, Anton","Perdih, Franc"],"dc:format":[{"@xml:lang":"sl","#text":"10 strani"},{"@xml:lang":"sl","#text":"številka:3"},{"@xml:lang":"sl","#text":"letnik:53"},{"@xml:lang":"sl","#text":"str. 306-315"}],"dc:identifier":["ISSN:1318-0207","COBISSID:27967237","URN:URN:NBN:SI:doc-81GC8T8Q"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Slovensko kemijsko društvo"},"dc:subject":[{"@xml:lang":"sl","#text":"alkani"},{"@xml:lang":"sl","#text":"fizikalna kemija"},{"@xml:lang":"sl","#text":"oktansko število"},{"@xml:lang":"sl","#text":"struktura"}],"dcterms:temporal":{"@rdf:resource":"1998-2025"},"dc:title":{"@xml:lang":"sl","#text":"Chemical interpretation of octane number|"},"dc:description":[{"@xml:lang":"sl","#text":"The empirical rules of Octane Number (ON) dependence on the structure of alkanes are amended. ON decreases with the number of CH2 groups and increases with the number of CH3 groups; the number of adjacent CH2 groups has the highest but sigmoid influence; ON decreases with the separation between branchesč it increases with the more central position of branches and with their bulkiness. Ethyl group causes apparently contradictory effectsČ If it increases the number of CH2 groups, ON decreases; if not, ON increases. The use of structural features of alkanes, i.e. the size of the molecule, the number of branches, the position of branches, the separation between them, the type of branches, and the type of the branched structure enables a more thorough understanding of the relations between the structure of alkanes and their physicochemical properties. Comparison of kinetic and structural data ofn-alkanes vs. branched alkanes indicates that in alkanes having a sufficientnumber (3 to 7) of adjacent CH2 groups there exists the possibility of forming a limited number of gem-diperoxydiol groups, which may be responsible for knocking of low ON fuel - air mixtures"},{"@xml:lang":"sl","#text":"Izboljšana so empirična pravila o odvisnosti oktanskega števila alkanov od njihove strukture. Le-to pada s številom CH2 skupin in narašča s številom CH3 skupin; najbolj vplivajo sosednje CH2 skupine. Pada z razdaljo med vejami, narasča pa z bolj sredinsko lego vej in njihovo razvejanostjo. Etilne skupine dajo navidezno nasprotujoče učinke; če povečajo stevilo CH2 skupin, oktansko število pade, če ne, pa naraste. Uporaba strukturnih značilnosti alkanov, to so velikost molekule, število vej, njihova lega, razdalja med njimi, njihova vrsta in vrsta razvejanosti, omogoča temeljitejše razumevanje odnosov med njihovo strukturo in lastnostmi. Primerjava kinetičnih in strukturnih podatkovza n-alkane in razvejane alkane kaže, da pri alkanih, ki imajo dovolj (3 do 7) sosednjih CH2 skupin, obstoja možnost tvorbe omejenega števila gem-diperoksidiolnih skupin, ki bi lahko bile vzrok klenkanja v motorju"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:doc-81GC8T8Q","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:doc-81GC8T8Q"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:doc-81GC8T8Q/a9f4ea70-0bf4-4a8e-bb45-1e8dd68c0404/PDF"},"edm:rights":{"@rdf:resource":"http://creativecommons.org/licenses/by/4.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Slovensko kemijsko društvo"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:doc-81GC8T8Q/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:doc-81GC8T8Q"}}}}