Study of natural resin composition by method of NMR spectroscopy

Skakovsky, E. D.; Yu., Tychinskaya L.; Klyuev, A. Yu.; Латышевич, И. А.; Gapankova, E. I.; Козлов, Н. Г.

doi:10.32864/polymmattech-2018-4-3-84-88

Cited by 2 publications

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“…Figure 1 shows the NMR spectra of the solutions of the oleoresin samples collected in September (IX) 2019. Eight RA were detected, namely, abietic (1), dehydroabietic (2), isopimaric (3), levopimaric (4), neoabietic (5), palustric (6), pimaric (7), and sandaracopimaric (8) acids, as well as five MT, namely, camphene (9), limonene (10), α-pinene (12), β-pinene (13), and terpinolene (14). Also, myrcene (11) was present in some of the samples.…”

Section: Resultsmentioning

confidence: 99%

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Seasonal Changes in the Composition of Scots Pine (Pinus Syvestris L.) Oleoresin, Measured by the NMR Method

Skakovskii,

L.Yu.,

Gapan’kova

et al. 2023

Russ J Bioorg Chem

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Seasonal changes in the composition of Scots pine oleoresin were analyzed by 1 H and 13 C NMR spectroscopy. Due to favorable weather conditions (positive temperatures on the sampling dates throughout the year) samples for each of the 12 months were obtained and studied. Chloroform (CDCl 3 ) solutions of oleoresin were investigated. Eight resin acids: abietic, dehydroabietic, isopimaric, levopimaric, neoabietic, palustric, pimaric, and sandaracopimaric acids, as well as six monoterpenes: camphene, limonene, myrcene, α-pinene, β-pinene, and terpinolene, were identified and quantified. It was revealed that the amounts of the oleoresin released and its constituent α-pinene decreased at low temperatures. Other monoterpenes were not detected within the measurement accuracy in this period of time. It was supposed that monoterpenes, formed in smaller amounts during the period of pests' anabiosis, play the key role in the control of coniferous insect pests. The contents of dehydroabietic, isopimaric, neoabietic, pimaric, and sandaracopimaric acids were found to vary insignificantly throughout the year. An interrelation between the amounts of abietic, levopimaric, and palustric acids in the oleoresin composition was revealed. The observed interrelation was supposedly associated with low-temperature catalytic reactions of levopimaric acid isomerization leading to predominant formation of abietic acid. It was suggested that these processes should be taken into account to avoid errors in determining the contents of these acids in the oleoresin even in the case of statistical analysis.

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Section: Resultsmentioning

confidence: 99%

“…Using 1 H and 13 C NMR spectroscopy, we studied the composition of the Scots pine resin balsams [12], the gum resin proper [13,14], and the gum rosin derived therefrom [14].…”

Section: Introductionmentioning

confidence: 99%

Seasonal Changes in the Composition of Scots Pine (Pinus Syvestris L.) Oleoresin, Measured by the NMR Method

Skakovskii,

L.Yu.,

Gapan’kova

et al. 2023

Russ J Bioorg Chem

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Seasonal Changes in the Composition of Scots Pine (Pinus Syvestris L.) Oleoresin Measured by the NMR Method

Скаковский¹,

Tychinskaya²,

Hapankova³

et al. 2022

JCPRM

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Analysis of seasonal changes in the composition of Scots pine oleoresin by 1H and 13C NMR spectroscopy was carried out. Due to favorable weather conditions (positive temperatures on the days of sampling throughout the year) samples for each of the 12 months were obtained and studied. Chloroform (CDCl3) solutions of oleoresin were studied. Eight resin acids were identified and quantified: abietic, dehydroabietic, isopimaric, levopimaric, neoabietic, palustric, pimaric and sandaracopymaric, and also 6 monoterpenes: camphene, limonene, myrcene, α-pinene, β-pinene and terpinolene. It was found that the amount of oleoresin and α-pinene contained in it decreased at low temperatures. At the same time other monoterpenes were not detected within the measurement error. It was supposed that monoterpenes formed in smaller amounts during the period of pests' anabiosis, play the main role in the control of coniferous insect pests. It was found that the content of dehydroabietic, isopimaric, neoabietic, pimaric, and sandaracopymaric acids varied insignificantly during the year. The relationship between the amounts of abietic, levopimaric and palustric acids in the composition of oleoresin was found. It was supposed that the observed relationship was caused by low-temperature catalytic reactions of levopimaric acid isomerization with formation of abietic acid mainly. It was suggested that these processes should be taken into account to exclude errors in determining the content of the above acids in oleoresin even in case of statistical analysis.

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Study of natural resin composition by method of NMR spectroscopy

Cited by 2 publications

References 0 publications

Seasonal Changes in the Composition of Scots Pine (Pinus Syvestris L.) Oleoresin, Measured by the NMR Method

Seasonal Changes in the Composition of Scots Pine (Pinus Syvestris L.) Oleoresin, Measured by the NMR Method

Seasonal Changes in the Composition of Scots Pine (Pinus Syvestris L.) Oleoresin Measured by the NMR Method

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