Über die Biogenese von Aromastoffen bei Pflanzen und Früchten / About the Biogenesis of Aroma-Substances in Plants and Fruits

1971 ◽  
Vol 26 (8) ◽  
pp. 774-779 ◽  
Author(s):  
Roland Tressl ◽  
Friedrich Drawert
Keyword(s):  
Fatty Acids ◽  
Double Bond ◽  
Osmium Tetroxide ◽  
Octanoic Acid ◽  
Mass Spectrometric ◽  
Valeric Acid ◽  
Similar Composition ◽  
Mass Spectrometric Fragmentation

Banana slices metabolize 8-14C-octanoic acid via β-oxidation to ketones, alcohols, and fatty acids depending on the climacteric state of the fruits. Simultaneously, esterification of the octanoic acid and its reduction to octanol take place. The latter was found as alkyl component in various esters.As the typical banana-aroma component cis-hepten- (4) -ol- (2) was found. The position of the double bond was determined by treatment with osmium tetroxide, sililation of the resulting hydroxycompound, and mass spectrometric fragmentation.Strawberries have a similar composition of the aroma but cis-hepten- (4) -ol- (2) was not formed.The occurence of 14C-labelled oenanth- and valeric acid is explained by α-oxidation.

2,3-Dihydroxy Fatty Acids-Containing Waxes in Storks (C iconiidae)

1996 ◽  
Vol 51 (9-10) ◽  
pp. 743-749 ◽  
Author(s):  
Jürgen Jacob ◽  
Gottfried Raab
Keyword(s):  
Fatty Acids ◽  
Mass Spectrometric ◽  
Hydroxy Fatty Acids ◽  
Uropygial Gland ◽  
Mass Spectrometric Fragmentation ◽  
Dihydroxy Fatty Acids ◽  
Fatty Acids And Alcohols

Uropygial gland secretions from five out of a total of seven species forming the genus Ciconia (family Ciconiidae; order Ciconiiformes) were found to consist of mixtures of monoester waxes, diester waxes, triester waxes, and triglycerides. Monoester waxes were composed of unbranched fatty acids and alcohols, whereas diester waxes derived from both 2- and 3-hydroxy fatty acids esterified with unbranched alcohols and fatty acids. Interestingly, triester waxes were also found deriving from either 2-hydroxy alkylmalonic acids or from erythro-2,3-dihydroxy fatty acids the latter of which have not yet been found in vertebrates so far. To compare the typical mass spectrometric fragmentation of this class of compounds erythro-2,3-dihydroxyhexadecanoic acid has been synthesized

Massenspektroskopische Untersuchungen an Glycosylglyceriden / Mass Spectrometric Investigation of Glycosyl Glycerides

1973 ◽  
Vol 28 (9-10) ◽  
pp. 499-504 ◽  
Author(s):  
H. Budzikiewicz ◽  
J. Rullkötter ◽  
E. Heinz
Keyword(s):  
Fatty Acids ◽  
Mass Spectrometric ◽  
Spectrometric Investigation ◽  
Mass Spectrometric Investigation ◽  
Special Regard ◽  
Fragmentation Behavior ◽  
Mass Spectrometric Fragmentation

Abstract The mass spectrometric fragmentation behavior of glycosyl glycerides is discussed with special regard to the localisation of the fatty acids present in the molecule and to the applicability for mixture analyses.

Obtaining and Characterization of Alhagi persarum Boiss. et Buhse Callus Cell Cultures, Isoflavonoid Producers

2020 ◽  
Vol 36 (6) ◽  
pp. 35-48
Author(s):  
D.V. Коchkin ◽  
G.I. Sobolkovа ◽  
А.А. Fоmеnkov ◽  
R.А. Sidorov ◽  
А.М. Nоsоv
Keyword(s):  
Fatty Acids ◽  
Cell Culture ◽  
Liquid Chromatography ◽  
Secondary Metabolites ◽  
Cell Cultures ◽  
Mass Spectrometric ◽  
Mass Spectrometric Detection ◽  
Gas Liquid Chromatography ◽  
Callus Cell

The physiological characteristics of the callus cell cultures of Alhagi persarum Boiss et Buhse, a member of the legume family, widely used in folk medicine, have been studied. It was shown that the source of the explant was an important factor in the initiation of callusogenesis: more intense callusogenesis (almost 100%) was observed for explants from various organs of sterile seedlings, rather than intact plants (less than 30%). As a result, more than 20 lines of morphologically different callus cell cultures were obtained, and the growth parameters for the 5 most intensively growing lines were determined. The composition of fatty acids (FA) of total lipids and secondary metabolites in the most physiologically stable callus line Aр-207 was analyzed. Using capillary gas-liquid chromatography with mass spectrometric detection (GLC-MS), 19 individual C12--C24 FAs were identified, the main fraction of which were palmitic (~ 23%), stearic (~ 22%), linoleic (~ 14%) and α-linolenic (~ 33%) acids. The established atypical ratio of FAs (a simultaneous high content of both saturated FAs and polyunsaturated α-linolenic acid) is possibly due to the adaptation of cells to in vitro growth conditions. Phytochemical analysis of the secondary metabolites was carried out using ultra-performance liquid chromatography with electrospray ionization mass spectrometric detection (UPLC MS). Compounds belonging to different structural groups of isoflavones were found. Aglycones (calycosin, formononetin and afrormosin isomer), glucosides (formononetin glucoside), as well as esters of glucosides (malonylglycosides of calicosin, formononetin, afrormosin isomers, glycitein and genistein) were detected. These secondary metabolites are widespread in plants of the Fabaceae family; however, isoflavones are rare in representatives of the Alhagi genus. The presence of malonylated isoflavone glycosides in Alhagi spp. was shown for the first time. endemic plant species, Alhagi, in vitro cell culture, callus cell culture, isoflavones, fatty acids All studies were carried out using the equipment of the "Experimental Biotechnological Facility" and the "All-Russian Collection of Cell Cultures of Higher Plants" of IРР RAS. This work was supported by the Russian Foundation for Basic Research (RFBR), contract no.18-54-06021 (Az_a), and the Government of the Russian Federation, Megagrant Project no. 075-15-2019-1882.

scholarly journals Synthesis of a sucrose dimer with enone tether; a study on its functionalization

2014 ◽  
Vol 10 ◽  
pp. 1246-1254 ◽  
Author(s):  
Zbigniew Pakulski ◽  
Norbert Gajda ◽  
Magdalena Jawiczuk ◽  
Jadwiga Frelek ◽  
Piotr Cmoch ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Double Bond ◽  
Carbonyl Group ◽  
Osmium Tetroxide ◽  
Cd Spectroscopy ◽  
Allylic Alcohol ◽  
Circular Dichroïsm

The reaction of appropriately functionalized sucrose phosphonate with sucrose aldehyde afforded a dimer composed of two sucrose units connected via their C6-positions (‘the glucose ends’). The carbonyl group in this product (enone) was stereoselectively reduced with zinc borohydride and the double bond (after protection of the allylic alcohol formed after reduction) was oxidized with osmium tetroxide to a diol. Absolute configurations of the allylic alcohol as well as the diol were determined by circular dichroism (CD) spectroscopy using the in situ dimolybdenum methodology.

Investigation of the mass-spectrometric fragmentation of some isoindole derivatives

1991 ◽  
Vol 27 (7) ◽  
pp. 732-736
Author(s):  
P. B. Terent'ev ◽  
V. A. Kovtunenko ◽  
Z. V. Voitenko ◽  
T. T. Kucherenko ◽  
V. V. Ishchenko ◽  
...  
Keyword(s):  
Mass Spectrometric ◽  
Mass Spectrometric Fragmentation
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