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Andersson, J
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Publications (3 of 3) Show all publications
Hedenström, E., Wallin, E., Andersson, J., Bång, J., Wang, H.-L., Löfstedt, C., . . . Baquet, P. (2015). Stereoisomeric Analysis of 6,10,14-Trimethylpentadecan-2-ol and the Corresponding Ketone in Wing Extracts from African Bicyclus Butterfly Species. Journal of Chemical Ecology, 41(1), 44-51
Open this publication in new window or tab >>Stereoisomeric Analysis of 6,10,14-Trimethylpentadecan-2-ol and the Corresponding Ketone in Wing Extracts from African Bicyclus Butterfly Species
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2015 (English)In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 41, no 1, p. 44-51Article in journal (Refereed) Published
Abstract [en]

Gas chromatography (GC) and mass spectrometry (MS) were used to determine the stereoisomeric compositions of 6,10,14-trimethylpentadecan-2-ol and 6,10,14-trimethylpentadecan-2-one in wing extracts from 17 Bicyclus butterfly species from different regions of Africa. All samples were purified using solid phase extraction (SPE). Since some species contained both alcohol and ketone, these were separated and the ketone was reduced to the alcohol before analysis as either (R)-trans-chrysanthemoyl or (S)-2-acetoxypropionyl esters. A novel asymmetric synthesis was developed for a reference mixture of (2R/S,6S,10R)-6,10,14-trimethylpentadecan-2-ol with known composition of the eight stereoisomers. The mixture then was used as the (R)-trans-chrysanthemoyl esters to correlate each of the eight gas chromatographic peaks to a specific stereoisomer of the extracted wing compounds. Seven butterfly species showed (2R,6R,10R)-configuration of the alcohol, four species contained minute amounts of alcohol too small to determine the stereochemistry, nine species showed (6R,10R)-configuration of the ketone, and one species contained minute amounts of ketone too small to determine the stereochemistry. No other stereoisomers of alcohol or ketone could be detected in the extracts, and the quantities of the compounds in the wing extracts varied from 5 to 900 ng per sample for each species.

Keywords
6, 10, 14-Trimethylpentadecan-2-one, Asymmetric synthesis, GC/MS, Stereoisomers, Wing compounds
National Category
Chemical Sciences
Identifiers
urn:nbn:se:miun:diva-23026 (URN)10.1007/s10886-014-0539-5 (DOI)000348424800006 ()2-s2.0-84925537674 (Scopus ID)
Note

Published online 20 Dec 2014.

Available from: 2014-09-19 Created: 2014-09-19 Last updated: 2017-12-05Bibliographically approved
Andersson, J. & Wågberg, L. (2009). Ageing of Flexographic Printed Model Cellulose Surfaces and Determination of the Mechanisms Behind Ageing. Pulp & paper Canada, 110(7-8), 34-38
Open this publication in new window or tab >>Ageing of Flexographic Printed Model Cellulose Surfaces and Determination of the Mechanisms Behind Ageing
2009 (English)In: Pulp & paper Canada, ISSN 0316-4004, Vol. 110, no 7-8, p. 34-38Article in journal (Refereed) Published
Abstract [en]

The influence of storage conditions on the ink detachment efficiency of

water-based flexographic ink printed onto model cellulose surfaces and

handsheets was investigated. It was shown that UV light, elevated

temperatures, longer storage time, increasing surface roughness, and

increasing surface hydrophobicity all had a negative effect on ink

detachment. It was also shown that the ink's chemical and structural

characteristics changed when stored at elevated temperatures. No

chemical or structural changes could be observed for the ink when

stored under UV light.

 

Keywords
Materials Science, Paper & Wood
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-10016 (URN)000269791800008 ()2-s2.0-70349627492 (Scopus ID)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2017-12-13Bibliographically approved
Forsström [Andersson], J. & Wågberg, L. (2004). Ageing of flexographic printed model cellulose surfaces and determination of the mechanisms behind ageing. In: Research Forum on Recycling, Proceedings: . Paper presented at 7th Research Forum on Recycling, 27 September 2004 through 29 September 2004, Quebec City, QC (pp. 21-25). TAPPI Press
Open this publication in new window or tab >>Ageing of flexographic printed model cellulose surfaces and determination of the mechanisms behind ageing
2004 (English)In: Research Forum on Recycling, Proceedings, TAPPI Press, 2004, p. 21-25Conference paper, Published paper (Refereed)
Abstract [en]

The influence of storage conditions on the ink detachment efficiency of water-based flexographic ink printed onto model cellulose surfaces and hand sheets were investigated. It was shown that UV-light, elevated temperatures, longer storage time, increasing surface roughness and increasing surface hydrophobicity all had a negative effect on ink detachment. It was also shown that the ink's chemical and structural characteristics changed when stored at elevated temperatures. No chemical or structural changes could be observed for the ink when stored under UV-light.

Place, publisher, year, edition, pages
TAPPI Press, 2004
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-29052 (URN)2-s2.0-33645010865 (Scopus ID)
Conference
7th Research Forum on Recycling, 27 September 2004 through 29 September 2004, Quebec City, QC
Available from: 2016-10-06 Created: 2016-10-06 Last updated: 2016-10-06Bibliographically approved
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