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1972. |
1973. Paramagnetic intrinsic point defects in alkali phosphate glasses : unraveling the P[sub]3 center origin and local environment effectsLuigi Giacomazzi, Nikita S. Shcheblanov, Layla Martin-Samos, Mikhail E. Povarnitsyn, Shinji Kohara, Matjaž Valant, Nicolas Richard, Nadege Ollier, 2021, original scientific article Keywords: oxygen, electron paramagnetic resonance spectroscopy, phosphates, amorphous materials, defects
Published in RUNG: 04.05.2021; Views: 2757; Downloads: 0
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1974. Intercomparison and characterization of 23 Aethalometers under laboratory and ambient air conditions: : procedures and unit-to-unit variabilitiesAndrea Cuesta-Mosquera, Griša Močnik, Luka Drinovec, Thomas Müller, Sascha Pfeifer, Maria Cruz Minguillon, Björn Briel, Paul Buckley, Vadimas Dudoitis, Javier Fernández-García, 2021, original scientific article Abstract: Aerosolized black carbon is monitored worldwide to quantify its impact on air quality and climate. Given its importance, measurements of black carbon mass concentrations must be conducted with instruments operating in quality-checked and ensured conditions to generate data which are reliable and comparable temporally and geographically.
In this study, we report the results from the largest characterization and intercomparison of filter-based absorption photometers, the Aethalometer model AE33, belonging to several European monitoring networks. Under controlled laboratory conditions, a total of 23 instruments measured mass concentrations of black carbon from three well-characterized aerosol sources: synthetic soot, nigrosin particles, and ambient air from the urban background of Leipzig, Germany. The objective was to investigate the individual performance of the instruments and their comparability; we analyzed the response of the instruments to the different aerosol sources and the impact caused by the use of obsolete filter materials and the application of maintenance activities.
Differences in the instrument-to-instrument variabilities from equivalent black carbon (eBC) concentrations reported at 880 nm were determined before maintenance activities (for soot measurements, average deviation from total least square regression was −2.0 % and the range −16 % to 7 %; for nigrosin measurements, average deviation was 0.4 % and the range −15 % to 17 %), and after they were carried out (for soot measurements, average deviation was −1.0 % and the range −14 % to 8 %; for nigrosin measurements, the average deviation was 0.5 % and the range −12 % to 15 %). The deviations are in most of the cases explained by the type of filter material employed by the instruments, the total particle load on the filter, and the flow calibration.
The results of this intercomparison activity show that relatively small unit-to-unit variability of AE33-based particle light absorbing measurements is possible with well-maintained instruments. It is crucial to follow the guidelines for maintenance activities and the use of the proper filter tape in the AE33 to ensure high quality and comparable black carbon (BC) measurements among international observational networks.
Keywords: black carbon, aerosol, absorption, filter absorption photometer, aethaloemter
Published in RUNG: 03.05.2021; Views: 2075; Downloads: 0
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1975. Measurement of the fluctuations in the number of muons in extensive air showers with the Pierre Auger ObservatoryA. Aab, Andrej Filipčič, Gašper Kukec Mezek, Jon Paul Lundquist, Samo Stanič, Marta Trini, Serguei Vorobiov, Danilo Zavrtanik, Marko Zavrtanik, Lukas Zehrer, 2021, original scientific article Keywords: ultra-high energy cosmic rays, extensive air showers (EAS), EAS muonic component, hadronic interaction models, Pierre Auger Observatory
Published in RUNG: 29.04.2021; Views: 2244; Downloads: 0
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1976. Community-wide experimental evaluation of the PROSS stability-design methodYoav Peleg, Renaud Vincentelli, Brett M. Collins, Kai-En Chen, Emma K. Livingstone, Saroja Weeratunga, Natalya Leneva, Qian Guo, Kim Remans, Ario De Marco, 2021, original scientific article Keywords: protein stability, recombinant production, optimization algorithm, PROSS
Published in RUNG: 23.04.2021; Views: 2294; Downloads: 0
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1977. |
1978. Quality control of purified proteins to improve data quality and reproducibility: results from a large-scale surveyNick Berrow, Ario De Marco, Mario Lebendiker, Maria Garcia-Alai, Stefan H. Knauer, Blanca Lopez-Mendez, Andre Matagne, Annabel Parret, Kim Remans, Stephan Uebel, Bertrand Raynal, 2021, original scientific article Keywords: protein quality, biophysical analysis, protein aggregates
Published in RUNG: 22.04.2021; Views: 2158; Downloads: 0
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1979. Nanobody-dependent detection of microcystis aeruginosa by ELISA and thermal lens spectrometryGbenga Folorunsho Oginni, Sandra Oloketuyi, Elisa Mazzega, Hanna Budasheva, Alfred Beran, Marina Cabrini, Dorota Korte, Mladen Franko, Ario De Marco, 2021, original scientific article Keywords: cyanobacteria, nanobodies, fluobodies, phage display, thermal lens spectrometry
Published in RUNG: 19.04.2021; Views: 2283; Downloads: 0
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1980. |
