TY - JOUR AU - Major, István AU - Gyökös, Brigitta AU - Túri, Marianna AU - Futó, István AU - Filep, Ágnes AU - Hoffer, András AU - Furu, Enikő Emese AU - Jull, Timothy AJ AU - Molnár, Mihály TI - Evaluation of an automated EA-IRMS method for total carbon analysis of atmospheric aerosol at HEKAL JF - JOURNAL OF ATMOSPHERIC CHEMISTRY J2 - J ATMOS CHEM VL - 75 PY - 2018 IS - 1 SP - 85 EP - 96 PG - 12 SN - 0167-7764 DO - 10.1007/s10874-017-9363-y UR - https://m2.mtmt.hu/api/publication/3215365 ID - 3215365 N1 - Hertelendi Laboratory of Environmental Studies, Isotope Climatology and Environmental Research Centre, Institute of Nuclear Research of the Hungarian Academy of Sciences, Bem tér 18/c, Debrecen, H-4026, Hungary Faculty of Engineering, University of Debrecen, Ótemető út 2-4, Debrecen, H-4028, Hungary MTA-SZTE Research Group on Photoacoustic Spectroscopy, Dóm tér 9, Szeged, H-6720, Hungary Air Chemistry Group of the Hungarian Academy of Sciences, Egyetem Street 10, Veszprém, H-8200, Hungary Laboratory of Ion Beam Applications, Institute of Nuclear Research of the Hungarian Academy of Sciences, Bem tér 18/c, Debrecen, H-4026, Hungary Department of Geosciences, University of Arizona, Tucson, AZ 85721, United States Export Date: 14 December 2020 CODEN: JATCE Correspondence Address: Major, I.; Hertelendi Laboratory of Environmental Studies, Isotope Climatology and Environmental Research Centre, Institute of Nuclear Research of the Hungarian Academy of Sciences, Bem tér 18/c, Hungary; email: imajor@atomki.hu AB - Comprehensive atmospheric studies have demonstrated that carbonaceous particles are one of the main components of atmospheric aerosols over Europe. The aim of our study was to establish an automated elemental analyser interfaced to a stable isotope mass spectrometer (EA-IRMS) method at the Hertelendi Laboratory of Environmental Studies (HEKAL), as a suitable method of quantification of total carbon mass in individual PM2.5 aerosol samples. Total carbon (TC) mass and simultaneous stable isotopic ratios were determined for both test standard and genuine aerosol samples. Finally, the results were compared to the ones obtained independently by an alternative sealed tube combustion method developed previously at HEKAL. The TC recovery tests of standard material prepared by the sealed tube method confirmed at least a carbon recovery yield of 92% for a broad range of carbon mass (100–2000 μg). The stable isotopic results confirmed that sealed tube method is reproducible and suitable to be used as a reference to verify our new EA-IRMS method. The EA-IRMS TC measurements of genuine aerosols gave on average 3% higher carbon recovery yield, relative to the uncorrected results of the sealed tube method. The comparison of the stable isotopic results by the two methods for aerosols also showed minimal differences. Consequently, the possibility of simultaneous TC and stable isotopic analyses makes the EA-IRMS method a very attractive alternative for continuous measurement of aerosols, with an accuracy and reliability similar to other commercial devices. LA - English DB - MTMT ER - TY - JOUR AU - Drinovec, L AU - Gregoric, A AU - Zotter, P AU - Wolf, R AU - Anne, Bruns AU - Bruns, E A AU - Prevot, A S H AU - Favez, O AU - Sciare, J AU - Arnold, I J AU - Chakrabarty, R K AU - Moosmüller, H AU - Filep, Ágnes AU - Mocnik, G TI - The filter-loading effect by ambient aerosols in filter absorption photometers depends on the coating of the sampled particles JF - ATMOSPHERIC MEASUREMENT TECHNIQUES J2 - ATMOS MEAS TECH VL - 10 PY - 2017 IS - 3 SP - 1043 EP - 1059 PG - 17 SN - 1867-1381 DO - 10.5194/amt-10-1043-2017 UR - https://m2.mtmt.hu/api/publication/3328715 ID - 3328715 LA - English DB - MTMT ER - TY - JOUR AU - Major, István AU - Gyökös, Brigitta AU - Túri, Marianna AU - Futó, István AU - Filep, Ágnes AU - Hoffer, András AU - Molnár, Mihály TI - Testing of an automated online EA-IRMS method for fast and simultaneous carbon content and stable isotope measurement of aerosol samples JF - GEOPHYSICAL RESEARCH ABSTRACTS J2 - GEOPHYS RES ABSTR VL - 18 PY - 2016 IS - 1 SP - 3843 SN - 1029-7006 UR - https://m2.mtmt.hu/api/publication/33071937 ID - 33071937 N1 - 240478 LA - English DB - MTMT ER - TY - JOUR AU - Filep, Ágnes AU - Fodor, Gergely AU - Kun-Szabó, Fruzsina AU - Tiszlavicz, László AU - Rázga, Zsolt AU - Bozsó, Gábor AU - Bozóki, Zoltán AU - Szabó, Gábor AU - Peták, Ferenc TI - Exposure to urban PM1 in rats: development of bronchial inflammation and airway hyperresponsiveness JF - RESPIRATORY RESEARCH J2 - RESP RES VL - 17 PY - 2016 IS - 1 PG - 11 SN - 1465-9921 DO - 10.1186/s12931-016-0332-9 UR - https://m2.mtmt.hu/api/publication/3038231 ID - 3038231 N1 - Cited By :15 Export Date: 14 February 2020 AB - BACKGROUND: Several epidemiological and laboratory studies have evidenced the fact that atmospheric particulate matter (PM) increases the risk of respiratory morbidity. It is well known that the smallest fraction of PM (PM1 - particulate matter having a diameter below 1 mum) penetrates the deepest into the airways. The ratio of the different size fractions in PM is highly variable, but in industrial areas PM1 can be significant. Despite these facts, the health effects of PM1 have been poorly investigated and air quality standards are based on PM10 and PM2.5 (PM having diameters below 10 mum and 2.5 mum, respectively) concentrations. Therefore, this study aimed at determining whether exposure to ambient PM1 at a near alert threshold level for PM10 has respiratory consequences in rats. METHODS: Rats were either exposed for 6 weeks to 100 mug/m(3) (alert threshold level for PM10 in Hungary) urban submicron aerosol, or were kept in room air. End-expiratory lung volume, airway resistance (Raw) and respiratory tissue mechanics were measured. Respiratory mechanics were measured under baseline conditions and following intravenous methacholine challenges to characterize the development of airway hyperresponsiveness (AH). Bronchoalveolar lavage fluid (BALF) was analyzed and lung histology was performed. RESULTS: No significant differences were detected in lung volume and mechanical parameters at baseline. However, the exposed rats exhibited significantly greater MCh-induced responses in Raw, demonstrating the progression of AH. The associated bronchial inflammation was evidenced by the accumulation of inflammatory cells in BALF and by lung histology. CONCLUSIONS: Our findings suggest that exposure to concentrated ambient PM1 (mass concentration at the threshold level for PM10) leads to the development of mild respiratory symptoms in healthy adult rats, which may suggest a need for the reconsideration of threshold limits for airborne PM1. LA - English DB - MTMT ER - TY - CONF AU - Filep, Ágnes AU - G H, Fodor AU - Kun-Szabó, Fruzsina AU - L, Tiszlavicz AU - Rázga, Zsolt AU - Bozóki, Zoltán AU - Szabó, Gábor AU - F, Peták TI - Pulmonary consequences of concentrated atmospheric nanoparticle inhalation in rats T2 - European Aerosol Conference, 2015 PY - 2015 UR - https://m2.mtmt.hu/api/publication/3073721 ID - 3073721 AB - https://www.eac2015.it/images/DOCS/OR3-Handbook_EAC2015.pdf LA - English DB - MTMT ER - TY - CONF AU - Filep, Ágnes AU - Gergely, H Fodor AU - Kun-Szabó, Fruzsina AU - László, Tiszlavicz AU - Rázga, Zsolt AU - Bozóki, Zoltán AU - Szabó, Gábor AU - Ferenc, Peták TI - Pulmonary consequences of concentrated atmospheric nanoparticle inhalation in rats T2 - 12th Multinational Congress on Microscopy PY - 2015 UR - https://m2.mtmt.hu/api/publication/3073711 ID - 3073711 LA - English DB - MTMT ER - TY - GEN AU - Filep, Ágnes TI - Légköri aeroszol forrásainak vizsgálata fotoakusztikus spektroszkópiával. Így kutattunk mi! TÁMOP-4.2.4.A/2-11/1-2012-0001 Nemzeti Kiválóság a Konvergencia Régióban Program beszámolói TS - Így kutattunk mi! TÁMOP-4.2.4.A/2-11/1-2012-0001 Nemzeti Kiválóság a Konvergencia Régióban Program beszámolói PY - 2015 UR - https://m2.mtmt.hu/api/publication/2996480 ID - 2996480 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Filep, Ágnes AU - Drinovec, Luka AU - Palágyi, Andrea AU - Manczinger, László AU - Vágvölgyi, Csaba AU - Bozóki, Zoltán AU - Hitzenberger, Regina AU - Szabó, Gábor TI - Source Specific Cyto- and Genotoxicity of Atmospheric Aerosol Samples JF - AEROSOL AND AIR QUALITY RESEARCH J2 - AEROSOL AIR QUAL RES VL - 15 PY - 2015 IS - 6 SP - 2325 EP - 2331 PG - 7 SN - 1680-8584 DO - 10.4209/aaqr.2015.03.0131 UR - https://m2.mtmt.hu/api/publication/2992655 ID - 2992655 N1 - Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary MTA-SZTE Research Group on Photoacoustic Spectroscopy, University of Szeged, Szeged, Hungary Aerosol d.o.o, Ljubljana, Slovenia Department of Microbiology, FSI, University of Szeged, Szeged, Hungary University of Vienna, Wien, Austria Cited By :9 Export Date: 12 April 2022 Correspondence Address: Filep, Á.; Department of Optics and Quantum Electronics, Hungary; email: afilep@titan.physx.u-szeged.hu LA - English DB - MTMT ER - TY - BOOK ED - Filep, Ágnes ED - Mucsiné, Égerházi Lilla TI - A XII. Magyar Aeroszol Konferencia előadás-kivonatai ET - 0 PB - Szegedi Tudományegyetem (SZTE) CY - Szeged PY - 2015 SP - 96 SN - 9633063647 UR - https://m2.mtmt.hu/api/publication/2869928 ID - 2869928 LA - Hungarian DB - MTMT ER - TY - CONF AU - Filep, Ágnes AU - Luka, Drinovec AU - Andrea, Palágyi AU - László, Manczinger AU - Vágvölgyi, Csaba AU - Bozóki, Zoltán AU - Szabó, Gábor TI - Connection between optically based source apportionment and toxicity of atmospheric aerosol samples T2 - Abstracts of the International Aerosol Conference 2014 C1 - Busan PY - 2014 UR - https://m2.mtmt.hu/api/publication/2828816 ID - 2828816 LA - English DB - MTMT ER -