Long-term unbalanced diet might lead to intestinal malodorous gas generation and inflammation, which would cause health problems, especially in confined environment. In this study, the effects of high-fat and high-protein diets from different nutrient sources, including casein lard, soy protein and soybean oil, and pork protein and lard, respectively, on the differences of malodorous gas compounds emission and inflammation in rats were explored as well as the correlation with gut microbiota. The results showed that all the high-fat and high-protein diets could induce organ damage, abnormal serum biochemical indexes and inflammation. However, the malodorous gas compounds in the three experimental groups were totally different, which might be because the production of malodorous gas compounds was jointly regulated by the intestinal microbiota and liver cytochrome P450.
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http://dx.doi.org/10.1016/j.foodres.2022.110989 | DOI Listing |
Polymers (Basel)
November 2024
Institute of Inorganic and Analytic Chemistry, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany.
Polyurethane (PUR) soft foams release malodorous and potentially toxic compounds when exposed to oxidative conditions. Current chamber test methods cannot distinguish between pre-existing volatiles and those formed during oxidation, nor can they assess the formation rates of oxidation products. We subjected PUR soft foam to oxidative treatment in a continuous air flow at 120 °C.
View Article and Find Full Text PDFAnal Chem
December 2024
Chongqing Key Laboratory of Interface Physics in Energy Conversion, College of Physics, Chongqing University, Chongqing 401331, China.
The prevention and control of odor gas generated from kitchen waste are significant missions in research on environmental pollution. Because of the high complexity and variability of kitchen waste, the development of a suitable technique with high sensitivity for the accurate detection of odor gas is an urgent and core task in this frontier field. Here, a technique combining surface-enhanced Raman spectroscopy (SERS) and artificial intelligence (AI) is explored for detecting malodorous components in the leachate of kitchen waste.
View Article and Find Full Text PDFJ Breath Res
November 2024
LRM Statistical Consulting, LLC, West Orange, NJ, United States of America.
Oral malodor negatively impacts a person's quality of life and may affect up to 50% of the population. The aim of this randomized, placebo and no-product controlled, evaluator-blind, proof-of-concept study was to evaluate the effectiveness and safety of the single use of two experimental lozenges containing the laccase enzyme and green coffee extract (with and without flavor) in reducing intrinsic oral malodor. Following 12-16 h of avoidance of oral hygiene,156 generally healthy subjects presented at screening and baseline visits with a mean organoleptic odor intensity (OI) score of ⩾2 and an OralChromareading of ⩾125 parts per billion (ppb) hydrogen sulfide (HS) gas and were randomly assigned to receive either one of the two experimental lozenges, a placebo lozenge, or no-product.
View Article and Find Full Text PDFJ Chromatogr A
December 2024
Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, Pisa 56124, Italy.
We developed a novel approach to selectively isolate or remove nearly any compound from complex mixtures of volatile organic compounds. This was achieved by customizing a GC×GC system with a Deans switch, a passive splitter, and a custom-made adapter for sample recollection. The new setup was evaluated with 106 standard chemicals covering a wide range of volatility (boiling points: 56 - 343 ⁰C) and polarity (log P: 0.
View Article and Find Full Text PDFBackground And Purpose: Despite substantial evidence supporting the role of resident bacterial communities in therapeutic fasting outcomes, research has primarily focused on gut microbiota, leaving changes in oral microbiota largely unexplored. The clinical significance of oral health changes during fasting is nonetheless underscored by the documented development of halitosis in fasting individuals. However, no scientific studies have comprehensively examined the interplay between salivary microbiota alterations, inflammatory changes in the gingival crevice, and the production of malodorous volatile compounds.
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