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--- pinus_sylvestris_l [2018/06/29 16:53]
andreas
+++ pinus_sylvestris_l [2020/02/07 11:38] (aktuell)
andreas
@@ Zeile 28: / Zeile 28: @@
 [Tümen, İbrahim, and Markku Reunanen. "A comparative study on turpentine oils of oleoresins of Pinus sylvestris L. from three districts of Denizli." Records of Natural Products 4.4 (2010): 224-229] [[http://acgpubs.org/RNP/2010/Volume%204/Issue%201/27-RNP-1008-297.pdf]]
-To elucidate the smell of pine wood, solvent-assisted flavour evaporation (SAFE) of volatiles from pine wood shavings followed by dedicated odorant analysis techniques such as gas chromatography-olfactometry (GC-O) and aroma extract dilution analysis (AEDA) was applied. Of 44 odour-active compounds, 39 were identified by two-dimensional gas chromatography-mass spectrometry/olfactometry (2D-GC-MS/O). The majority of the identified odorants were fatty acid degradation products, plus some terpenoic substances and odorous substances resulting from the degradation of lignin. Highest flavour dilution factors (FD>=243) showed α-pinene (woody resinous), hexanal (green grassy), octanal (citrus), (E)-non-2-enal (fatty), linalool (citrus), (E)-dec-2-enal (fatty), (E,E)-nona-2,4-dienal (fatty), pentanoic acid (cheesy), (E,E)-deca-2,4-dienal (fatty), heptanoic acid (pepperoni-like, plastic), δ-octalactone (coconut), γ-nonalactone (peach) and (E,Z,Z)-trideca-2,4,7-trienal (fruity blood-like metallic), δ-nonalactone (sweet coconut), nonanoic acid (leather artificial soapy), sotolone (savoury), α-bisabolol (balsamic pepper-like), phenylacetic acid (honey-like), vanillin (vanilla-like), 3-phenylpropanoic acid (vomit-like fruity), an unidentified androstenone-like substance (perfume-like) and thymoquinone (pencil-like). \\
+To elucidate the smell of pine wood, solvent-assisted flavour evaporation (SAFE) of volatiles from pine wood shavings followed by dedicated odorant analysis techniques such as gas chromatography-olfactometry (GC-O) and aroma extract dilution analysis (AEDA) was applied. Of 44 odour-active compounds, 39 were identified by two-dimensional gas chromatography-mass spectrometry/olfactometry (2D-GC-MS/O). The majority of the identified odorants were fatty acid degradation products, plus some terpenoic substances and odorous substances resulting from the degradation of lignin. Highest flavour dilution factors (FD>=243) showed α-pinene (woody resinous), hexanal (green grassy), octanal (citrus), (E)-non-2-enal (fatty), linalool (citrus), (E)-dec-2-enal (fatty), (E,E)-nona-2,4-dienal (fatty), pentanoic acid (cheesy), (E,E)-deca-2,4-dienal (fatty), heptanoic acid (pepperoni-like, plastic), δ-octalactone (coconut), γ-nonalactone (peach), (E,Z,Z)-trideca-2,4,7-trienal (fruity blood-like metallic), δ-nonalactone (sweet coconut), nonanoic acid (leather artificial soapy), sotolone (savoury), α-bisabolol (balsamic pepper-like), phenylacetic acid (honey-like), vanillin (vanilla-like), 3-phenylpropanoic acid (vomit-like fruity), an unidentified androstenone-like substance (perfume-like) and thymoquinone (pencil-like). \\
-[Schreiner, L., Bauer, P., & Buettner, A. (2018). Resolving the smell of wood-identification of odour-active compounds in Scots pine (Pinus sylvestris L.). Scientific reports, 8(1), 8294] \\
+[Schreiner, L., Bauer, P., & Buettner, A. (2018). Resolving the smell of wood-identification of odour-active compounds in Scots pine (Pinus sylvestris L.). Scientific reports, 8(1), 8294]
 [[https://www.nature.com/articles/s41598-018-26626-8]]
+Using stable isotope dilution analysis (SIDA) and odor activity values (OAVs) calculated on the basis of odor thresholds determined in cellulose, hexanal, octanal, (E)-non-2-enal, p-cresol, vanillin, and thymoquinone were the dominant odorants for wood odor of several softwood species (Pinus sylvestris, Larix decidua, Calocedrus decurrens, Abies concolor, and Picea abies). OAVs ≥ 1 were obtained for p-cresol (2), hexanal (OAV=6), octanal (374), (E)-non-2-enal (163), and vanillin (10). \\
+Of all wood samples, the highest concentration of α-pinene was observed in Scots pine wood (122 mg/kg), but with an OAV<1. \\
+"Even though α-pinene did not exceed an OAV > 1 in the wood samples, this compound was added to the recombinate for several reasons: On the one hand, during sensory evaluation, the attribute resin-like was rated with the highest values for the pine wood. Thus, the resin-like–smelling α-pinene might have an impact on the odor, since it was observed as the only odorant representing that odor impression. Furthermore, α-pinene was recorded with high-flavor dilution (FD) factors. In concordance with that, we found that preparation of the recombinates in the absence of α-pinene resulted in a lack of the resin-like odor. One reason for not exceeding an OAV ≥ 1 might be a potential synergism with other wood constituents, leading to an increased resin-like odor impression." \\
+[Schreiner, Linda, Eva Ortner, and Andrea Buettner. „Nosy confirmation: reconstitution of the characteristic odor of softwood via quantitative analysis and human sensory evaluation.“ Analytical and Bioanalytical Chemistry (2019): 1-13]
 {{:pinus_sylvestris.jpg?600}} \\

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