Verification of Chemical Composition of Commercially Available Propolis Extracts by Gas Chromatography–Mass Spectrometry Analysis

2015 ◽  
Vol 18 (5) ◽  
pp. 584-591 ◽  
Author(s):  
Urszula Czyżewska ◽  
Joanna Konończuk ◽  
Joanna Teul ◽  
Paweł Drągowski ◽  
Renata Pawlak-Morka ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Chromatography Mass Spectrometry

Bud exudate composition of Populus tremuloides

1991 ◽  
Vol 69 (10) ◽  
pp. 2291-2295 ◽  
Author(s):  
S. English ◽  
W. Greenaway ◽  
F. R. Whatley
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Key Words ◽  
Populus Tremuloides ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Chromatography Mass Spectrometry ◽  
Populus Grandidentata

Gas chromatography – mass spectrometry analysis of the bud exudate of seven specimens of Populus tremuloides (section Leuce) revealed a different chemical composition from that previously observed for poplars of sections Aigeiros and Tacamahaca. The bud exudate consists of three principal groups of compounds; benzoic and phenylpropenoic acids and their esters, the flavanones isosakuranetin and sakuranetin and their corresponding chalcones, and hydrocarbons. The flavonoids characteristic of section Aigeiros and section Tacamahaca poplars were found to be either missing, as in the case of flavanonols and dihydrochalcones, or present in very small amounts. The seven specimens of P. tremuloides analysed were classified into three categories depending on the relative proportions of these three groups of compounds present in their bud exudate, and the exudate composition was compared with that of four specimens of Populus grandidentata analysed. Key words: Populus tremuloides, bud exudate, gas chromatography – mass spectrometry.

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