scholarly journals Reliance Evaluation of Easy and Effective Measuring Method for Formaldehyde in Indoor Air Samples

2005 ◽  
Vol 15 (4) ◽  
pp. 871-877
Author(s):  
Yuichi FUSHIWAKI ◽  
Kiyomi TSUJI ◽  
Fumi NAKANO ◽  
Kazuo HASEGAWA ◽  
Yasuaki MORI ◽  
...  
Keyword(s):  
Indoor Air ◽  
Measuring Method ◽  
Air Samples

RP-HPLC ANALYSIS OF CARBONYL COMPOUNDS IN SOME INDOOR AIR SAMPLES IN A FACULTY FROM CLUJ-NAPOCA

2013 ◽  
Vol 12 (2) ◽  
pp. 219-225
Author(s):  
Carmen Roba ◽  
Cristina Rosu ◽  
Iulia Neamtiu ◽  
Eugen Gurzau
Keyword(s):  
Indoor Air ◽  
Carbonyl Compounds ◽  
Hplc Analysis ◽  
Air Samples ◽  
Rp Hplc

scholarly journals Complete Genome Sequence of Brevundimonas sp. Strain SGAir0440, Isolated from Indoor Air in Singapore

2019 ◽  
Vol 8 (31) ◽  
Author(s):  
Rikky W. Purbojati ◽  
Daniela I. Drautz-Moses ◽  
Akira Uchida ◽  
Anthony Wong ◽  
Megan E. Clare ◽  
...  
Keyword(s):  
Single Molecule ◽  
Indoor Air ◽  
Complete Genome Sequence ◽  
Complete Genome ◽  
Sequencing Data ◽  
Circular Chromosome ◽  
Protein Coding ◽  
Content Type ◽  
Air Samples ◽  
Protein Coding Genes

Brevundimonas sp. strain SGAir0440 was isolated from indoor air samples collected in Singapore. Its genome was assembled using single-molecule real-time sequencing data, resulting in one circular chromosome with a length of 3.1 Mbp. The genome consists of 3,033 protein-coding genes, 48 tRNAs, and 6 rRNA operons.

scholarly journals Evaluation of PFBOA Method for the Determination of Aldehydes in Indoor Air Samples.

1997 ◽  
Vol 7 (3) ◽  
pp. 515-520 ◽  
Author(s):  
Yasuaki MORI ◽  
Kiyomi TSUJI ◽  
Setsuko SETSUDA ◽  
Sumio GOTO ◽  
Sukeo ONODERA ◽  
...  
Keyword(s):  
Indoor Air ◽  
Air Samples

scholarly journals Hygienic assessment of chemical composition of pollutants generated in various ways of consumption nicotine-containing product

2020 ◽  
Vol 99 (6) ◽  
pp. 638-644
Author(s):  
Ekaterina V. Zaritskaya ◽  
I. Sh. Yakubova ◽  
A. Yu. Mikheeva ◽  
L. A. Alikbaeva
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Delivery System ◽  
Health Risks ◽  
Indoor Air ◽  
Air Sampling ◽  
Tobacco Products ◽  
Air Samples ◽  
Volatile Organic ◽  
Unknown Composition

Introduction. Lack of studies proving or denying passive smoker health risks caused by electronic cigarettes prevented from introducing restrictive measures and considering them to be tobacco products as early as in 2013. Indoor air pollution by consumed nicotine-containing products in extra-low concentrations which could be detected using high-tech lab mass-spectrometry techniques was the object of study. Material and methods. “Unknown composition” air sampling was carried out in the process of simulation tests. Three types of tobacco products were used in the tests: tobacco cigarettes, electronic nicotine-delivery system (ENDS), battery-powered heat-not-burn tobacco cigarettes (IQOS) with tobacco sticks. “Unknown composition” air samples were analyzed for volatile organic compounds, medium volatile organic compounds, polycyclic aromatic hydrocarbons (total and separately 16 priority PAHs, inorganic elements (Si, Pb, Cu, Cr, Ni). Sampling was carried out three times a day on separate days for each type of product and control, a total of 12 “unknown composition” air samples being collected. The study of “unknown composition” air samples was carried out at the accredited chemical-analytical center “Arbitrazh” of the D.I. Mendeleev Institute of Metrology (accreditation certificate РОСС RU.0001.510650).Results. A total number of 115 chemicals were determined, and among them, substances significant concentrations of which are most likely related to tobacco or nicotine consumption, as compared to control, and depend on the type of nicotine-containing product, were identified. Statistically significant concentration excess (р≤ 0.05), as compared to control, was seen for 27 chemicals in indoor air polluted by-products of consumed tobacco cigarettes; when using electronic nicotine-delivery system (ENDS) the excess (р≤ 0.05) was shown for 2 chemicals, i.e.: acenaphthylene and benz(a)perene, and when using heat-not-burn tobacco products (IQOS) the excess of studied chemical concentrations in comparison with control was not reported.Conclusion. Findings of comparative analysis of “unknown composition” air sampling give evidence that a much larger number of harmful chemicals at significantly exceeded concentrations (р≤ 0.05), including those causing human health risks, is released when smoking cigarettes, as compared to using ENDS or IQOS.

Comparing Carbonyls Levels in Indoor Air in two Offices -Green and Old Building

2017 ◽  
Vol 68 (8) ◽  
pp. 1708-1710 ◽  
Author(s):  
Raluca Diodiu ◽  
Toma Galaon
Keyword(s):  
Carboxylic Acids ◽  
Indoor Air ◽  
Carbonyl Compounds ◽  
High Performance ◽  
Green Building ◽  
Analytical Techniques ◽  
Passive Samplers ◽  
The Other ◽  
Air Samples ◽  
Aldehydes And Ketones

The concentrations of 17 carbonyl compounds were investigated in indoor air of two offices - one located in a green building and the other in an old building, both from Bucharest. Indoor air samples were collected during normal activities of the working staff on passive samplers. Two analytical techniques were used: Ion Chromatography for carboxylic acids and High Performance Liquid Chromatography for aldehydes and ketones. A questionnaire was administrated in order to collect information about buildings characteristics, indoor furniture, decorating materials and electronical devices used during the sampling. Formaldehyde, acroleine+acetone, acetaldehyde, hexaldehyde and carboxylic acids were the most abundant compounds that accounted for more than 50% of the total carbonyls. The majority of the aldehydes showed higher concentrations in the old building office compared to the concentrations found in the green building office. Regarding the carboxylic acids: the concentration of formic acid was slightly higher in the old building office versus the green building office; in the case of acetic acid, the concentration found in the old building office was around two times higher comparing to the green building office.

scholarly journals Assessment of mold infestation of conditioning devices and indoor air

2021 ◽  
Vol 100 (7) ◽  
pp. 668-673
Author(s):  
Elena V. Khaldeeva ◽  
Nadejda I. Glushko ◽  
Svetlana A. Lisovskaya
Keyword(s):  
Air Quality ◽  
Species Diversity ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Conditioning ◽  
Continuous Operation ◽  
Large Species ◽  
Air Conditioners ◽  
Air Samples

Introduction. Indoor air quality is an essential component of a healthy human environment. Air conditioning units can affect indoor air quality, including mycogenic contamination of the air if the condition is not adequately monitored. Material and method. The paper presents the results of a mycological study of air samples and flushes from the surface of filters and gratings of air conditioning devices taken from 40 residential and office premises. Results. The presence of micromycetes fungi was noted in 100% of the samples taken from the surface of filters and air conditioning grids and 81.6% of air samples. A greater species diversity of fungi (26 species) was revealed in air samples compared to air conditioning devices (15 species). A higher frequency of occurrence of dark-coloured species of fungi, incl. Aspergillus spp. and Alternaria spp., and fungal species belonging to the third group of pathogenicity, were noticed on the surface of air conditioners, compared with air samples, in which Penicillium spp., Fusarium spp., Trichoderma spp. were more often detected. It was found that the surface of air conditioners functioned sporadically. For a short time (28 rooms), there is a large species diversity of mycobiota at a low or moderate level of seeding (no more than 103 CFU). In rooms with long-term continuous air conditioners (12 rooms), a high level of seeding (more than 104 CFU) by 1-2 species of fungi was more often noted. The existence of a close relationship, confirmed by the values of the Pearson contingency coefficient, between the species composition of the mycobiota of air conditioning devices and air, and a higher level of mycogenic contamination in rooms with long-term continuous operation of air conditioners, were shown. Conclusion. Thus, air conditioning devices can be a source of mycogenic air contamination, especially during long-term continuous operation, which must be taken into account to ensure indoor air quality.

scholarly journals Safety Recommendations for Moxa Use Based on the Concentration of Noxious Substances Produced during Commercial Indirect Moxibustion

2017 ◽  
Vol 35 (2) ◽  
pp. 93-99 ◽  
Author(s):  
O Sang Kwon ◽  
Seong Jin Cho ◽  
Kwang-Ho Choi ◽  
Sun Hee Yeon ◽  
Suk-Yun Kang ◽  
...  
Keyword(s):  
Indoor Air ◽  
Environmental Law ◽  
Emission Characteristics ◽  
Air Samples ◽  
Treatment Conditions ◽  
Volatile Organic ◽  
Safe Limits ◽  
Potential Risks ◽  
Baseline Values ◽  
Moxa Floss

Background Moxibustion therapy has been used historically for thousands of years and there are many clinical trials supporting its efficacy and effectiveness for various conditions. Moxa smoke has been a major reason for avoiding moxibustion due to its smell and potential risks to the human body. Methods 10 units of commercial indirect moxa (CIM) from six manufacturers (A–F) were burnt in a 2.5×2.5×2.5 m chamber without ventilation, and concentrations of carbon oxides (CO and CO2), nitrogen oxides (NOx), and volatile organic compounds (VOCs) from the indoor air samples were measured. Results For brands A, B, C, D, E, and F, respectively, relative to baseline values, we observed an increase in CO (from 0.002 to 0.007, 0.006, 0.005, 0.006, 0.005, and 0.006 parts per billion (ppb)), NOx (from 0.009 to 0.051, 0.025, 0.015, 0.050, 0.019, and 0.020 ppb), and total VOCs (TVOC; from 48.06 to 288.83, 227.93, 140.82, 223.22, 260.15, and 161.35 μg/m3), while the concentration of CO2 was not elevated. Each CIM brand demonstrated different VOC emission characteristics, which could be divided into three groups. On average, we estimated that 20 units of CIM or 2.41 g moxa floss would need to be combusted in order to exceed the safe levels set by Korean environmental law. This limit is likely to be greater in the case of a larger room or use of ventilation. Conclusions Despite increased CO/NOx/VOC concentrations, overall levels remained within safe limits. These findings may help clinicians to maintain safe moxibustion treatment conditions to help keep both patients and clinicians safe from the pollutants generated by moxa combustion.

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