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A review of the volatiles from the healthy human body

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TLDR
A compendium of all the volatile organic compounds (VOCs) emanating from the human body (the volatolome) is for the first time reported and it is the authors' intention that this database will not only be a useful database of VOCs listed in the literature, but will stimulate further study of V OCs from healthy individuals.
Abstract
A compendium of all the volatile organic compounds (VOCs) emanating from the human body (the volatolome) is for the first time reported. 1840 VOCs have been assigned from breath (872), saliva (359), blood (154), milk (256), skin secretions (532) urine (279), and faeces (381) in apparently healthy individuals. Compounds were assigned CAS registry numbers and named according to a common convention where possible. The compounds have been grouped into tables according to their chemical class or functionality to permit easy comparison. Some clear differences are observed, for instance, a lack of esters in urine with a high number in faeces. Careful use of the database is needed. The numbers may not be a true reflection of the actual VOCs present from each bodily excretion. The lack of a compound could be due to the techniques used or reflect the intensity of effort e.g. there are few publications on VOCs from blood compared to a large number on VOCs in breath. The large number of volatiles reported from skin is partly due to the methodologies used, e.g. collecting excretions on glass beads and then heating to desorb VOCs. All compounds have been included as reported (unless there was a clear discrepancy between name and chemical structure), but there may be some mistaken assignations arising from the original publications, particularly for isomers. It is the authors' intention that this database will not only be a useful database of VOCs listed in the literature, but will stimulate further study of VOCs from healthy individuals. Establishing a list of volatiles emanating from healthy individuals and increased understanding of VOC metabolic pathways is an important step for differentiating between diseases using VOCs.

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Citations
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Metabolomics for Investigating Physiological and Pathophysiological Processes

TL;DR: How metabolomics is yielding important new insights into a number of important biological and physiological processes is explored, with a major focus on illustrating how metabolomics and discoveries made through metabolomics are improving the understanding of both normal physiology and the pathophysiology of many diseases.
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A European respiratory society technical standard : exhaled biomarkers in lung disease

TL;DR: Application of breath biomarker measurement in a standardised manner will provide comparable results, thereby facilitating the potential use of these biomarkers in clinical practice, and highlighting future research priorities in the field.
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Breath analysis by nanostructured metal oxides as chemo-resistive gas sensors

TL;DR: In this paper, a review of advances in these technologies in connection to breath analysis are critically reviewed, focusing on chemo-resistive gas sensors for their low cost and portability highlighting their potential and challenges for breath analysis as they start to be used in studies involving humans.
References
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Host-Bacterial Mutualism in the Human Intestine

TL;DR: New studies are revealing how the gut microbiota has coevolved with us and how it manipulates and complements the authors' biology in ways that are mutually beneficial.
Journal ArticleDOI

Brain Metabolism during Fasting

TL;DR: Catheterization of cerebral vessels in three obese patients undergoing 5-6 wk of starvation demonstrated that beta-hydroxybutyrate and acetoacetate replaced glucose as the predominant fuel for brain metabolism.
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TL;DR: Chemostat studies using pure cultures of saccharolytic gut micro-organisms demonstrate that C availability and growth rate strongly affect the outcome of fermentation, which can be seen through the effects of inorganic electron acceptors on fermentation processes.
Journal ArticleDOI

Short chain fatty acids in the human colon.

John H. Cummings
- 01 Sep 1981 - 
TL;DR: The human colon contains a luxuriant mixed culture of bacteria, which is in the main strictly anaerobic, the end-products being primarily the short chain, or volatile, fatty acids, acetic, propionic, and butyric acid.
Book

Patty's industrial hygiene and toxicology

F. A. Patty
TL;DR: Patty's industrial hygiene and toxicology, industrial hygiene as mentioned in this paper, industrial hygiene, toxicology and industrial hygiene, Patty's Industrial Hygiene and Toxicology, Industrial hygiene, and toxicity.
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