scholarly journals Seasonal variations in the leaf surface composition of field grown grapevine plants

2009 ◽  
Vol 74 (11) ◽  
pp. 1229-1240 ◽  
Author(s):  
Daniela Batovska ◽  
Iva Todorova ◽  
Simeon Popov
Keyword(s):  
Mass Spectrometry ◽  
Leaf Surface ◽  
Surface Composition ◽  
Environmental Stressors ◽  
Gas Chromatography Mass Spectrometry ◽  
Metabolic Profiles ◽  
Esterified Fatty Acids ◽  
Plant Environment ◽  
Aldehydes And Ketones ◽  
Plant Wax

The leaf surface is the first barrier of grapevine plants towards various environmental stressors causing damage in vineyards. For this reason, identification of leaf surface metabolites in grapevine and their putative role in plant-environment interactions is important for viticulture. In this study, the leaf surface components of 16 grapevine plants (Vitis vinifera) growing in an experimental vineyard were analyzed in two consecutive seasons - the summer and the autumn of 2007. Forty-eight individual metabolites typical of the cuticular plant wax were identified by gas chromatography-mass spectrometry (GC-MS). They belonged to the following groups of compounds: hydrocarbons, sterols, terpenes, free and esterified fatty acids, alcohols, aldehydes and ketones. The metabolic profiles of the summer and the autumn samples were statistically different (P < 0.05), which was mainly attributed to the specific insects present in the two seasons and to the adaptation of the grapevine to lower temperatures.

scholarly journals Molecular characterization of aldehydes and ketones in particle phase of mainstream and sidestream cigarette smoke

2019 ◽  
Vol 6 (2) ◽  
pp. 181832
Author(s):  
Xiu Chen ◽  
Quan Shi ◽  
Xibin Zhou ◽  
Xuezheng Liu
Keyword(s):  
Mass Spectrometry ◽  
Cigarette Smoke ◽  
Gas Chromatography Mass Spectrometry ◽  
Ion Cyclotron Resonance ◽  
Particle Phase ◽  
Orbitrap Mass Spectrometry ◽  
Aldehydes And Ketones ◽  
Ft Icr Ms ◽  
Ft Icr

Aldehydes and ketones (AKs) in cigarette smoke are risk to humans and environment. Due to the complexity of itself and the interference of the smoke tar matrix, the aldehydes and ketones in particle phase (AKPs) of mainstream smoke (MSS) and sidestream smoke (SSS) have not been well investigated. In this study, the AKPs of MSS and SSS were derivatized into polar products by reaction with Girard T reagent. The derivatives were isolated rapidly by column chromatography and analysed by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Fifteen species of aldehydes and ketones were detected by positive ion electrospray ionization (ESI) FT-ICR MS: O 1–6 , N 1 O 1–4 , N 2 O 1–3 and N 3 O 2–3 . The total number of AKPs obtained by ESI FT-ICR MS in MSS and SSS is about 1100 and 970, respectively. After hydrolysis, the original AKPs were obtained and 63 carbonyls were identified and quantified by gas chromatography–mass spectrometry (GCMS). The nitrogen-containing and high-oxygen AKPs were further characterized by Orbitrap mass spectrometry. Structures of compounds with high relative abundance in the mass spectrum were speculated (e.g. a series of degradants of cembrenediol) by comparison with the results of GCMS.

Metabolic Profiles: Gas-Phase Methods for Analysis of Metabolites

1971 ◽  
Vol 17 (8) ◽  
pp. 802-809 ◽  
Author(s):  
E C Horning ◽  
M G Horning
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Drug Metabolism ◽  
Gas Phase ◽  
Metabolic Pathways ◽  
Analytical Techniques ◽  
Gas Chromatography Mass Spectrometry ◽  
Metabolic Profiles ◽  
Developmental Studies ◽  
Drug Metabolites

Abstract Multicomponent analyses were carried out for three types of urinary constituents: steroids, acids, and drugs and drug metabolites. The methods were based on gas-phase analytical techniques, which include the use of instruments and instrumental systems for gas chromatography, gas chromatography—mass spectrometry, and mass spectrometry—computerization. After isolating an analytical sample, we prepared derivatives in each instance. Gas chromatography was used for separations, mass spectrometry for identification. These procedures for obtaining metabolic profiles may be used in various ways, including studies of abnormal conditions, drug metabolism, and the effects of drugs on metabolic pathways, as well as for human developmental studies.

Gas-Chromatographic—Mass-Spectrometric Determination of Urinary Acid Profiles of Normal Young Adults. II. The Effect of Ethanol

1973 ◽  
Vol 19 (9) ◽  
pp. 963-966 ◽  
Author(s):  
Thomas A Witten ◽  
Steven P Levine ◽  
Mary T Killian ◽  
Peter J R Boyle ◽  
Sanford P Markey
Keyword(s):  
Mass Spectrometry ◽  
Young Adults ◽  
Mass Spectrometric ◽  
Gas Chromatography Mass Spectrometry ◽  
Standard Diet ◽  
Metabolic Profiles ◽  
Excretion Rates ◽  
Urinary Acid ◽  
Chromatographic Mass

Abstract Urinary acid metabolic profiles of 26 healthy young adults who were maintained on a palatable standard diet for three days have been studied by combined gas chromatography-mass spectrometry. Means and standard deviations of the excretion rates of individual, identified acids were determined after the ingestion of ethanol and compared to basal values previously reported. A significant net effect of ethanol was demonstrated for only six of the acids studied: α- and β-hydroxybutyric, adipic, β-methyladipic, p-hydroxyphenylacetic, and 2,5-furandicarboxylic acids.

scholarly journals Characterisation of volatile compounds of pineapple peel wine

2020 ◽  
Vol 185 ◽  
pp. 04065
Author(s):  
Li Zhang ◽  
Chuang Zhou ◽  
Yuan Yuan ◽  
Xiao Gong ◽  
Yuhao Hu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Volatile Compounds ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Phenethyl Alcohol ◽  
Pineapple Peel ◽  
Aldehydes And Ketones ◽  
Analytical Program

An analytical program based on the headspace solid phase microextraction (HS-SPME) method combined with gas chromatography–mass spectrometry (GC-MS) was developed to extract and analysis profiling of volatiles from pineapple peel wine. In total, 57 volatile compounds were detected on the basis of the MS information and RI, including 25 esters, 9 alcohols, 8 acids, 7 phenolic compounds, 6 aldehydes and ketones,1 terpene and 1 lactone, respectively. The types of esters are the most in various aroma substances, and the content of alcohols is the largest. Phenethyl alcohol, 3-methyl-1-butano, 2-methyl-1- butano, 2,3-Butanediol and 2-Methoxy-4-vinylphenol were the major constituents.

Analysis of Volatile and Semivolatile Components in Marsdeniae tenocissimae by Gas Chromatography-Mass Spectrometry

2014 ◽  
Vol 1033-1034 ◽  
pp. 337-341
Author(s):  
Ze Feng Wang ◽  
Ling Shi ◽  
Ai Ping Fan ◽  
Chun Xu ◽  
Li Zhang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Gas Chromatography ◽  
Extraction Method ◽  
Soxhlet Extraction ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Aldehydes And Ketones ◽  
Peak Areas

A gas chromatography-mass spectrometry (GC-MS) method was developed for analyses of volatile and semivolatile components in Marsdeniae tenocissimae. The volatile and semivolatile components in stem of Marsdenia tenocissima are extracted by soxhlet extraction method with chloroform. The results show that 46 compositions were identified and accounted for 90.144% of the total peak areas. The major volatile and semivolatile components of stem were: alkanes (12.168%), alcohol (6.732%), aldehydes and ketones (7.272%), fatty acids (46.152%), Esters (13.068%), other (4.752%), respectively. The study provides useful data for further analysis of components of Marsdenia tenocissima.

scholarly journals Characterization of Essential Oil Components from Aromatic Plants that Grow Wild in the “Piana del Sele” (Salerno, Southern Italy) using Gas Chromatography-Mass Spectrometry

2015 ◽  
Vol 10 (7) ◽  
pp. 1934578X1501000 ◽  
Author(s):  
Daniele Naviglio ◽  
Laura Le Grottaglie ◽  
Manuela Vitulano ◽  
Marco Trifuoggi ◽  
Monica Gallo
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Essential Oils ◽  
Southern Italy ◽  
Gas Chromatography Mass Spectrometry ◽  
Thymus Vulgaris ◽  
Mentha Spicata ◽  
Flame Ionization ◽  
Aldehydes And Ketones

Essential oils from Rosmarinus officinalis, Salvia officinalis, Thymus vulgaris, Melissa officinalis and Mentha spicata growing wild in the “Piana del Sele” (Salerno, Southern Italy) have been extracted by hydro-distillation, quantified and characterized by gas chromatography coupled with flame ionization detection (FID) and mass-spectrometry (MS). Sixty-nine compounds were identified and classified according to their chemical classes. The results showed that the composition of the essential oils was extremely variable and specific for each botanical species. Hydrocarbons were the most abundant class in all essential oils except for sage where aldehydes and ketones were the most representative compounds. Only for thyme was a higher content of alcohols found.

scholarly journals ORGANIC MATTER IN THERMAL WATERS OF KAMCHATKA (OXYGEN-CONTAINING COMPOUNDS)

2021 ◽  
Vol 24 (2-3) ◽  
pp. 39-42
Author(s):  
V.A. Poturay
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organic Matter ◽  
High Temperature ◽  
Hydrothermal Systems ◽  
Gas Chromatography Mass Spectrometry ◽  
Thermal Waters ◽  
Water Mixture ◽  
Biogenic Origin ◽  
Aldehydes And Ketones

The author represents his investigation of the oxygen-containing compounds composition in sterile steam-water mixture from wells and in high-temperature springs of the Mutnovskaya, Paratunskaya and Uzonskaya hydrothermal systems. Using gas chromatography-mass spectrometry, it has been identified 42 oxygen-containing compounds belonging to 7 homologous series. Alcohols, esters, carboxylic acids, aldehydes and ketones of biogenic origin are widely distributed in the hydrothermal systems.

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