This study analyzed temporal variation of the composition of volatile organic compounds (VOCs) at different diffusion time of gaseous phase of aroma compounds of four essential oils, lavender, tea tree, eucalyptus, and melissa. GC/MS methodology with the trace gas sampling by a thermal desorption tube is used to quantitatively determine the concentration of the corresponding 14 kinds of major and original VOCs in four essential oils. This study revealed for the first time that the concentration level of gaseous phase composition is varied, with a diffusion time from that of the liquid phase at equilibrium with it and the VOCs in the essential oils are classified into two groups, depending on whether their concentration with the time. It is verified that the total concentration of VOCs of these essential oils in the room air diffused by the ultrasonic diffuser is as low as 0.6 ppb and decreased soon below 0.1 ppb.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8910502 | PMC |
| http://dx.doi.org/10.3390/ijerph19052904 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Essential oils modulate virulence phenotypes in a multidrug-resistant pyomelanogenic Pseudomonas aeruginosa clinical isolate.
Sci Rep
January 2025
School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri, Kerala, India.
Pyomelanogenic P. aeruginosa, frequently isolated from patients with urinary tract infections and cystic fibrosis, possesses the ability to withstand oxidative stress, contributing to virulence and resulting in persistent infections. Whole genome sequence analysis of U804, a pyomelanogenic, multidrug-resistant, clinical isolate, demonstrates the mechanism underlying pyomelanin overproduction.
View Article and Find Full Text PDFExtraction of Essential Oils and Terpene Volatiles from Plants and Identification by GC-MS-Based Techniques.
Methods Mol Biol
January 2025
Department of Cell and Metabolic Biology, Leibniz Institute of Plant Biochemistry, Halle, Germany.
The extraction of plant essential oils (EOs) and analysis by gas chromatography coupled to mass spectrometry (GC-MS) are standard methods when studying aromatic plants and the chemical composition of EOs. Here, two simple methods for the extraction of EO compounds from leaves of Thymus vulgaris are described. Organic solvent extraction and solid-phase microextraction (SPME), respectively, are used and the results of the GC-MS analyses are compared.
View Article and Find Full Text PDFStrategies for processing and valorization of ash gourd byproducts: A comprehensive review.
Food Chem
January 2025
Department of Food Engineering and Technology, Sant Longowal Institute of Engineering and Technology, Longowal 148106, (Sangrur) Punjab, India.
Ash gourd (Benincasa hispida) is cultivated for its medicinal benefits, with processing enhancing its health properties and shelf life. The processing industries generate significant byproducts, with peel and seeds common across all methods, along with lime (from petha sweet production), brine wastewater (from fermented foods), and pulp from juice processing. This review focuses on peel, seeds, and lime wastewater, which contain valuable compounds like polyphenols, terpenoids, essential oils, and ribosome-inactivating proteins known for their antioxidant and antibacterial properties.
View Article and Find Full Text PDFChemical composition, antibacterial and antioxidant activities of Piper betle and Anethum graveolens essential oils against Methicillin-resistant Staphylococcus aureus clinical isolates.
Braz J Microbiol
January 2025
Amity Institute of Biotechnology, Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh, 201313, India.
Methicillin-resistant Staphylococcus aureus (MRSA) is one of the leading causes of infection worldwide due to its antimicrobial resistance. Plant-derived essential oils (EOs) have undergone extensive observational and clinical research to explore their antimicrobial properties. The present study aimed to check mec A positive MRSA isolates using sequencing analysis, determination of chemical composition using gas chromatography-mass spectroscopy (GC-MS), antioxidant, and antimicrobial activity of Anethum graveolens and Piper betle EOs against the infectious agent MRSA.
View Article and Find Full Text PDFTurning residues into valuable compounds: organic waste conversion into odd-chain fatty acids via the carboxylate platform by recombinant oleaginous yeast.
Microb Cell Fact
January 2025
Biotechnological Processes Unit, IMDEA Energy, 28935, Móstoles (Madrid), Spain.
Environmental concerns are rising the need to find cost-effective alternatives to fossil oils. In this sense, short-chain fatty acids (SCFAs) are proposed as carbon source for microbial oils production that can be converted into oleochemicals. This investigation took advantage of the outstanding traits of recombinant Yarrowia lipolytica strains to assess the conversion of SCFAs derived from real digestates into odd-chain fatty acids (OCFA).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!