Microbial volatile organic compounds as indicators of fungi. Can an electronic nose detect fungi in indoor environments?

AbstractVolatile organic compounds (VOCs) are secondary pollutant precursors having adverse impacts on the environment and human health. Although VOC emissions, their sources, and impacts have been investigated, the focus has been on large-scale industrial sources or indoor environments; studies on relatively small-scale enterprises (e.g., auto-repair workshops) are lacking. Here, we performed field VOC measurements for an auto-repair painting facility in Korea and analyzed the characteristics of VOCs emitted from the main painting workshop (top coat). The total VOC concentration was 5069–8058 ppb, and 24–35 species were detected. The VOCs were mainly identified as butyl acetate, toluene, ethylbenzene, and xylene compounds. VOC characteristics differed depending on the paint type. Butyl acetate had the highest concentration in both water- and oil-based paints; however, its concentration and proportion were higher in the former (3256 ppb, 65.5%) than in the latter (2449 ppb, 31.1%). Comparing VOC concentration before and after passing through adsorption systems, concentrations of most VOCs were lower at the outlets than the inlets of the adsorption systems, but were found to be high at the outlets in some workshops. These results provide a theoretical basis for developing effective VOC control systems and managing VOC emissions from auto-repair painting workshops.

Download Full-text

Non-Invasive Method to Detect Infection with Mycobacterium tuberculosis Complex in Wild Boar by Measurement of Volatile Organic Compounds Obtained from Feces with an Electronic Nose System

Sensors ◽

10.3390/s21020584 ◽

2021 ◽

Vol 21 (2) ◽

pp. 584

Author(s):

Kelvin de Jesús Beleño-Sáenz ◽

Juan Martín Cáceres-Tarazona ◽

Pauline Nol ◽

Aylen Lisset Jaimes-Mogollón ◽

Oscar Eduardo Gualdrón-Guerrero ◽

...

Keyword(s):

Volatile Organic Compounds ◽

Wild Boar ◽

Organic Compounds ◽

Electronic Nose ◽

Bovine Tuberculosis ◽

Human Beings ◽

Non Invasive ◽

Testing Phase ◽

Volatile Organic ◽

Electronic Nose System

More effective methods to detect bovine tuberculosis, caused by Mycobacterium bovis, in wildlife, is of paramount importance for preventing disease spread to other wild animals, livestock, and human beings. In this study, we analyzed the volatile organic compounds emitted by fecal samples collected from free-ranging wild boar captured in Doñana National Park, Spain, with an electronic nose system based on organically-functionalized gold nanoparticles. The animals were separated by the age group for performing the analysis. Adult (>24 months) and sub-adult (12–24 months) animals were anesthetized before sample collection, whereas the juvenile (<12 months) animals were manually restrained while collecting the sample. Good accuracy was obtained for the adult and sub-adult classification models: 100% during the training phase and 88.9% during the testing phase for the adult animals, and 100% during both the training and testing phase for the sub-adult animals, respectively. The results obtained could be important for the further development of a non-invasive and less expensive detection method of bovine tuberculosis in wildlife populations.

Download Full-text

Beneficial effects of microbial volatile organic compounds (MVOCs) in plants

Applied Soil Ecology ◽

10.1016/j.apsoil.2021.104118 ◽

2021 ◽

Vol 168 ◽

pp. 104118

Author(s):

Jorge Poveda

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Beneficial Effects ◽

Volatile Organic ◽

Microbial Volatile Organic Compounds

Download Full-text

Study of Viability of Solid-Phase Microextraction, in vivo, in the Extraction of Microbial Volatile Organic Compounds Associated to the Pigment Production Process by the Monascus Fungus, in Submerged Fermentation

Journal of the Brazilian Chemical Society ◽

10.21577/0103-5053.20160269 ◽

2016 ◽

Author(s):

Robson Schacker ◽

Denise Moritz ◽

Miguel Caro ◽

Luiz Madureira ◽

Adriana Dias ◽

...

Keyword(s):

Volatile Organic Compounds ◽

Production Process ◽

Organic Compounds ◽

Submerged Fermentation ◽

Solid Phase Microextraction ◽

Solid Phase ◽

Pigment Production ◽

Volatile Organic ◽

Microbial Volatile Organic Compounds

Download Full-text

Influence of age and gender on the profile of exhaled volatile organic compounds analyzed by an electronic nose

Jornal Brasileiro de Pneumologia ◽

10.1590/s1806-37562015000000195 ◽

2016 ◽

Vol 42 (2) ◽

pp. 143-145 ◽

Cited By ~ 8

Author(s):

Silvano Dragonieri ◽

Vitaliano Nicola Quaranta ◽

Pierluigi Carratu ◽

Teresa Ranieri ◽

Onofrio Resta

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Electronic Nose ◽

Principal Component ◽

Exhaled Breath ◽

Age And Gender ◽

Volatile Organic ◽

Older Subjects ◽

Never Smokers ◽

And Gender

We aimed to investigate the effects of age and gender on the profile of exhaled volatile organic compounds. We evaluated 68 healthy adult never-smokers, comparing them by age and by gender. Exhaled breath samples were analyzed by an electronic nose (e-nose), resulting in "breathprints". Principal component analysis and canonical discriminant analysis showed that older subjects (≥ 50 years of age) could not be distinguished from younger subjects on the basis of their breathprints, as well as that the breathprints of males could not distinguished from those of females (cross-validated accuracy, 60.3% and 57.4%, respectively).Therefore, age and gender do not seem to affect the overall profile of exhaled volatile organic compounds measured by an e-nose.

Download Full-text