Development of probiotic mageu: A preliminary study of the organic volatiles using gas chromatography

2010 ◽  
Vol 28 (1) ◽  
Author(s):  
J.O Abu ◽  
P.J Jooste
Keyword(s):  
Gas Chromatography ◽  
Organic Volatiles ◽  
Preliminary Study

The role of organic volatile profiles in clinical diagnosis.

1981 ◽  
Vol 27 (6) ◽  
pp. 789-797 ◽  
Author(s):  
A Zlatkis ◽  
R S Brazell ◽  
C F Poole
Keyword(s):  
Gas Chromatography ◽  
Biological Fluids ◽  
Gas Chromatography Mass Spectrometry ◽  
Organic Volatiles ◽  
Volatile Profiles ◽  
Respiratory Virus Infection ◽  
Capillary Column Gas Chromatography ◽  
Trace Concentrations ◽  
Gain Access

Abstract The organic volatile constituents of biological fluids contain clinically useful diagnostic information for the recognition of metabolic disorders in man. To gain access to this information, it was necessary to develop the methodology for reproducibly stripping the trace concentrations of volatiles from biological fluids (dynamic headspace, gas phase-stripping, solvent extraction, and the transevaporator technique), to separate the complex extracts by high-resolution capillary column gas chromatography, and to develop computer-aided data-handling and pattern-recognition techniques for analyzing the immense amount of information generated. The normal and pathological organic volatiles identified by gas chromatography--mass spectrometry in urine, serum, and breast milk are tabulated. Clinical applications of the above techniques to the study and diagnosis of diabetes mellitus, respiratory virus infection, renal insufficiency, and cancer are described.

Gas chromatography/mass spectrometry identification of organic volatiles contributing to rendering odors

1982 ◽  
Vol 16 (12) ◽  
pp. 883-886 ◽  
Author(s):  
Herman R. Van Langenhove ◽  
Fredy A. Van Wassenhove ◽  
Jos K. Coppin ◽  
Marc R. Van Acker ◽  
Niceas M. Schamp
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Mass Spectrometry Identification ◽  
Organic Volatiles

D/L arabinitol Ratio as an Indicator of a Healthy Lifestyle. A preliminary Study

2013 ◽  
Vol 12 (7) ◽  
pp. 420-424
Author(s):  
Joanna Kałużna Czaplińska ◽  
Wioletta Grys ◽  
Tomasz Jędrzejczyk ◽  
Jacek Rynkowski
Keyword(s):  
Gas Chromatography ◽  
Healthy Lifestyle ◽  
Black Tea ◽  
Electron Capture Detection ◽  
Daily Consumption ◽  
Systemic Fungal Infection ◽  
Vitamin Deficiencies ◽  
Potential Indicator ◽  
Preliminary Study ◽  
Regular Intake

D-arabinitol, as opposed to the L-arabinitol, is produced by fungi of the genus Candida. The increasedD/L-arabinitol ratio in body fluids is a recognized biomarker of systemic fungal infection . The factors which increase the risk of candidiasis include: sugar and confectionery, sweetened sodas, alcohol, beer, coffee, black tea, red meat, refined flour products, tobacco and salt. Often, vitamin deficiencies are caused by candidiasis of the colon. The D/L ratios in urine were determined by gas chromatography with electron capture detection (GC-ECD). For 21 examined students a questionnaire survey related to their healthy lifestyle was conducted. The lower D/L ratio in the urine of students declaring regular intake of vitamin supplements and daily consumption of fruits and/or vegetables to improve their immunity against diseases was observed. The D/ L ratio may be considered a potential indicator of a healthy lifestyle, especially in the case of young people.

Gaseous and volatile exudates from germinating seeds and seedlings

1976 ◽  
Vol 54 (5-6) ◽  
pp. 518-532 ◽  
Author(s):  
V. Vančura ◽  
G. Stotzky
Keyword(s):  
Gas Chromatography ◽  
Formic Acid ◽  
Volatile Compounds ◽  
Plant Species ◽  
Qualitative And Quantitative ◽  
Volatile Metabolites ◽  
Ecological Implications ◽  
Organic Volatiles ◽  
Yellow Pine ◽  
Germinating Seeds

The quantities of gaseous and volatile metabolites liberated by germinating seeds and seedlings appeared to be related, in general, to the amount of storage substances present in the seeds. Both qualitative and quantitative differences were found between various plant species and varieties of both angiosperms and gymnosperms. The release of volatile compounds preceded the appearance of the first root and, with most seeds, was greatest in the first 24 to 48 h. Organic volatiles could be detected, by gas chromatography, in as little as 5% of the atmosphere from one germinating seed. All seeds that were studied liberated ethanol, and most seeds evolved methanol, formaldehyde, acetaldehyde, formic acid, ethylene, and propylene. Propionaldehyde and (or) acetone was also evolved by cotton, pea, and yellow pine. The possible source of these volatile metabolites and their ecological implications are discussed.

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