FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2042286750> ?p ?o ?g. }

• W2042286750 endingPage "126" @default.
• W2042286750 startingPage "117" @default.
• W2042286750 abstract "Abstract Heating of borage oil, either under vacuum as a model or during steam‐vacuum deodorization, produces artifacts that are geometrical isomers of γ‐linolenic acid ( cis ‐6, cis ‐9, cis ‐12 18∶3 acid). In a first approach, we have studied the behavior of these fatty acids in the form of either methyl or isopropyl esters on two capillary columns (CP‐Sil 88 and DB‐Wax). From this study, it appears that the DB‐Wax capillary column is the best suited analytical tool to study in some detail γ‐linolenic acid geometrical isomers. In a second approach, the structure of these isomers was formally established by combining several analytical techniques: Argentation thin‐layer chromatography, comparison of the equivalent chainlengths with those of isomers present in NO 2 ‐isomerized borage oil on two different capillary columns, partial hydrazine reduction, oxidative ozonolysis, gas chromatography coupled with mass spectrometry and gas chromatography coupled with Fourier transform infrared spectroscopy. The two main isomers that accumulate upon heat treatments are the trans ‐6, cis ‐9, cis ‐12 and cis ‐6, cis ‐9, trans ‐12 18∶3 acids with minor amounts of cis ‐6, trans ‐9, cis ‐12 18∶3 acid. One di‐ trans isomer, supposed to be the trans ‐6, cis ‐9, trans ‐12 18∶3 acid, is present in low although noticeable amounts in some of the heated oils. The content of these artificial fatty acids increases with increasing temperatures and duration of heating. The degree of isomerization (DI) of γ‐linolenic acid is less than 1% when the oil is deodorized at 200°C for 2 h. Heating at 260°C for 5 h increases the DI up to 74%. Isomerization of γ‐linolenic acid resembles that of α‐linolenic ( cis ‐9, cis ‐12, cis ‐15 18∶3) acid in several aspects: The same kinds and numbers of isomers are formed, and similar degrees of isomerization are reached when the octadecatrienoic acids are heated under identical conditions. It seems that the reactivity of a double‐bond vis‐à‐vis cis‐trans isomerization is linked to its relative position, central or external, and not to its absolute position (Δ6, 9, 12 or 15)." @default.
• W2042286750 created "2016-06-24" @default.
• W2042286750 creator A5009206632 @default.
• W2042286750 creator A5070960106 @default.
• W2042286750 date "1994-02-01" @default.
• W2042286750 modified "2023-10-16" @default.
• W2042286750 title "Characterization of γ-linolenic acid geometrical isomers in borage oil subjected to heat treatments (deodorization)" @default.
• W2042286750 cites W1532082124 @default.
• W2042286750 cites W1964707715 @default.
• W2042286750 cites W1970566698 @default.
• W2042286750 cites W1976296091 @default.
• W2042286750 cites W1981206147 @default.
• W2042286750 cites W2018298442 @default.
• W2042286750 cites W2035882312 @default.
• W2042286750 cites W2059063320 @default.
• W2042286750 cites W2063337840 @default.
• W2042286750 cites W2081644226 @default.
• W2042286750 cites W2160109519 @default.
• W2042286750 cites W2328364714 @default.
• W2042286750 cites W4252856092 @default.
• W2042286750 cites W987978119 @default.
• W2042286750 doi "https://doi.org/10.1007/bf02541545" @default.
• W2042286750 hasPublicationYear "1994" @default.
• W2042286750 type Work @default.
• W2042286750 sameAs 2042286750 @default.
• W2042286750 citedByCount "24" @default.
• W2042286750 countsByYear W20422867502012 @default.
• W2042286750 countsByYear W20422867502014 @default.
• W2042286750 countsByYear W20422867502015 @default.
• W2042286750 countsByYear W20422867502016 @default.
• W2042286750 countsByYear W20422867502017 @default.
• W2042286750 countsByYear W20422867502022 @default.
• W2042286750 crossrefType "journal-article" @default.
• W2042286750 hasAuthorship W2042286750A5009206632 @default.
• W2042286750 hasAuthorship W2042286750A5070960106 @default.
• W2042286750 hasConcept C104264131 @default.
• W2042286750 hasConcept C123460561 @default.
• W2042286750 hasConcept C126661725 @default.
• W2042286750 hasConcept C153033020 @default.
• W2042286750 hasConcept C153642686 @default.
• W2042286750 hasConcept C161790260 @default.
• W2042286750 hasConcept C176788430 @default.
• W2042286750 hasConcept C178790620 @default.
• W2042286750 hasConcept C185592680 @default.
• W2042286750 hasConcept C2779173278 @default.
• W2042286750 hasConcept C43617362 @default.
• W2042286750 hasConceptScore W2042286750C104264131 @default.
• W2042286750 hasConceptScore W2042286750C123460561 @default.
• W2042286750 hasConceptScore W2042286750C126661725 @default.
• W2042286750 hasConceptScore W2042286750C153033020 @default.
• W2042286750 hasConceptScore W2042286750C153642686 @default.
• W2042286750 hasConceptScore W2042286750C161790260 @default.
• W2042286750 hasConceptScore W2042286750C176788430 @default.
• W2042286750 hasConceptScore W2042286750C178790620 @default.
• W2042286750 hasConceptScore W2042286750C185592680 @default.
• W2042286750 hasConceptScore W2042286750C2779173278 @default.
• W2042286750 hasConceptScore W2042286750C43617362 @default.
• W2042286750 hasIssue "2" @default.
• W2042286750 hasLocation W20422867501 @default.
• W2042286750 hasOpenAccess W2042286750 @default.
• W2042286750 hasPrimaryLocation W20422867501 @default.
• W2042286750 hasRelatedWork W1544704432 @default.
• W2042286750 hasRelatedWork W1598377602 @default.
• W2042286750 hasRelatedWork W1970932631 @default.
• W2042286750 hasRelatedWork W2021926520 @default.
• W2042286750 hasRelatedWork W2029304452 @default.
• W2042286750 hasRelatedWork W2046089903 @default.
• W2042286750 hasRelatedWork W2066997627 @default.
• W2042286750 hasRelatedWork W2396486399 @default.
• W2042286750 hasRelatedWork W2605206679 @default.
• W2042286750 hasRelatedWork W4238592385 @default.
• W2042286750 hasVolume "71" @default.
• W2042286750 isParatext "false" @default.
• W2042286750 isRetracted "false" @default.
• W2042286750 magId "2042286750" @default.
• W2042286750 workType "article" @default.