scholarly journals Volatiles from the tropical ascomycete Daldinia clavata (Hypoxylaceae, Xylariales)

2018 ◽  
Vol 14 ◽  
pp. 135-147 ◽  
Author(s):  
Tao Wang ◽  
Kathrin I Mohr ◽  
Marc Stadler ◽  
Jeroen S Dickschat
Keyword(s):  
Stationary Phase ◽  
Natural Product ◽  
Absolute Configuration ◽  
Chromatographic Analysis ◽  
Mass Spectra ◽  
Closed Loop ◽  
Retention Indices ◽  
Published Data ◽  
Cytotoxic Effects ◽  
Gas Chromatographic Analysis

The volatiles from the fungus Daldinia clavata were collected by use of a closed-loop stripping apparatus and analysed by GC–MS. A few compounds were readily identified by comparison of measured to library mass spectra and of retention indices to published data, while for other compounds a synthesis of references was required. For one of the main compounds, 5-hydroxy-4,6-dimethyloctan-3-one, the relative and absolute configuration was determined by synthesis of all eight stereoisomers and gas chromatographic analysis using a homochiral stationary phase. Another identified new natural product is 6-nonyl-2H-pyran-2-one. The antimicrobial and cytotoxic effects of the synthetic volatiles are also reported.

Evaluation of Use of a Dicationic Liquid Stationary Phase in the Fast and Conventional Gas Chromatographic Analysis of Health-Hazardous C18Cis/Trans Fatty Acids

2009 ◽  
Vol 81 (13) ◽  
pp. 5561-5568 ◽  
Author(s):  
Carla Ragonese ◽  
Peter Quinto Tranchida ◽  
Paola Dugo ◽  
Giovanni Dugo ◽  
Leonard M. Sidisky ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Stationary Phase ◽  
Chromatographic Analysis ◽  
Trans Fatty Acids ◽  
Gas Chromatographic Analysis ◽  
Liquid Stationary Phase

scholarly journals Chiral Resolution and Absolute Configuration of 3α,6β-Dicinnamoyloxytropane and 3α,6β-Di(1-ethyl-1H-pyrrol-2-ylcarbonyloxy)tropane, Constituents of Erythroxylum Species

2014 ◽  
Vol 9 (1) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Marcelo A. Muñoz ◽  
Solange Arriagada ◽  
Pedro Joseph-Nathan
Keyword(s):  
Stationary Phase ◽  
Natural Product ◽  
Absolute Configuration ◽  
Optical Rotation ◽  
Normal Phase ◽  
Vibrational Circular Dichroism ◽  
Chiral Resolution ◽  
Case Characteristic ◽  
The Absolute

Chiral resolution of (±)-3α,6β-dicinnamoyloxytropane (1) and (±)-3α,6β-di(1-methyl-1 H-pyrrol-2-ylcarbonyloxy)tropane (2), prepared by esterification of (±)-3α,6β-tropanediol (3), was achieved using an amylose-derived HPLC stationary phase and normal phase conditions. The corresponding vibrational circular dichroism (VCD) spectra provided the absolute configuration of the enantiomers as (-)-(3 R,6 R)-1, (+)-(3S,6S)- 1, (-)-(3 R,6 R)-2 and (+)-(3S,6S)- 2. In each case, characteristic VCD bands for the absolute configuration determination of the 3α,6β-tropandiol esters were observed. While the absolute configuration of natural 1, previously isolated from Erythroxylum hypericifolium, could not be established due to the lack of literature optical rotation values, that of catuabine E, previously isolated from E. vacciniifolium, is now assigned as (-)-(3 R,6 R)-2 by comparison with the optical rotation values of the prepared samples and the reported rotation of the natural product.

scholarly journals Efficiency of gas chromatographic analysis of terpens and terpenoids of sources of aromatic substances, taking into account the polarity of the stationary phase

2020 ◽  
Vol 9 (3) ◽  
pp. 664-676
Author(s):  
Natalia Frolova ◽  
Аnatoliy Ukrainets ◽  
Oleksandra Niemirich ◽  
Oksana Melnyk ◽  
Іhor Ustymenko
Keyword(s):  
Stationary Phase ◽  
Chromatographic Analysis ◽  
Gas Chromatographic Analysis

A comparison of supports for quantitative gas chromatographic analysis of nickel and zinc dithiocarbamates

1984 ◽  
Vol 49 (1) ◽  
pp. 197-200
Author(s):  
Jana Chovancová ◽  
Ján Krupčík ◽  
Ján Garaj
Keyword(s):  
Stationary Phase ◽  
Chromatographic Analysis ◽  
Chromatographic Behaviour ◽  
Gas Chromatographic Analysis ◽  
Theoretical Plates

The gas chromatographic behaviour of nickel and zinc diethyldithiocarbamates was examined on various supports, mainly of the Chromaton and Chromosorb families, coated with polydimethylsiloxane nonpolar stationary phase. The coefficients of asymmetry, retention ratios and relative molar responses with respect to C28H58, and numbers of theoretical plates were determined. While poor results were obtained with Chromosorb G, Chromaton N Super appears to suit well to thedetermination.

Optimization of the selectivity of a cyanopropyl stationary phase for the gas chromatographic analysis of trans fatty acids

2008 ◽  
Vol 1194 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Clayton Antunes Martin ◽  
Claudio Celestino de Oliveira ◽  
Jesuí Vergílio Visentainer ◽  
Makoto Matsushita ◽  
Nilson Evelázio de Souza
Keyword(s):  
Fatty Acids ◽  
Stationary Phase ◽  
Chromatographic Analysis ◽  
Trans Fatty Acids ◽  
Gas Chromatographic Analysis

scholarly journals Gas Chromatographic Analysis of Pyrimidine and Purine Bases by Retention Indices

1978 ◽  
Vol 98 (11) ◽  
pp. 1536-1541 ◽  
Author(s):  
AKIRA YAMAJI ◽  
SUMIHISA KIMURA ◽  
HIDEKI KAWASAKI ◽  
HIDETAKA YUKI
Keyword(s):  
Chromatographic Analysis ◽  
Retention Indices ◽  
Purine Bases ◽  
Gas Chromatographic Analysis
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