wijesinghe, dakshith ruvin abu zobair, md esmaeelpour, mina
The rapid growth of industry and the global drive for modernization have led to an increase in gas emissions, which present significant environmental and health risks. As a result, there is a growing need for precise and sensitive gas-monitoring technologies. This review delves into the progress made regarding photoacoustic gas sensors, with a spec...
Osseiran, Noureddin Bichon, Jeyan Eliet, Sophie Peretti, Romain
The THz-TDS is a versatile technique and can be used to probe gas phase molecules. We are pushing the technique to its limit to try and detect trace gases at the sub-ppm levels. The experiments served as a reference for a quantitative approach that permits to extract the concentration of a probed gas. The single-parameter quantification model can b...
Pal, Ardhendu Mondal, Koushik Panda, Biswajit Pradhan, Manik
Published in
Laser Physics Letters
Nitrogen dioxide (NO2) is an important air pollutant due to its environmental impact and adverse effects on human health. It is released into the atmosphere primarily through anthropogenic activities. Here, we report on the development of a simple, compact, and cost-effective robust optical detection method exploiting cavity-enhanced absorption spe...
kuttippurath, jayanarayanan patel, vikas kumar gopikrishnan, gopalakrishna pillai varikoden, hamza
The increasing population and its associated amenities demand innovative devices, infrastructure, methods, plans and policies. Regional climate has a great role in deciding the air quality and energy demand, and therefore, weather and climate have an indisputable role in its consumption and storage. Here, we present the changes in trace gases and a...
siebler;, lukas
This study introduces a principle that unifies two experimental methods for evaluating airborne indoor virus-transmissions adapted to several ventilation measures. A first-time comparison of mechanical/natural ventilation and air purification with regard to infection risks is enabled. Effortful computational fluid dynamics demand detailed boundary ...
Greening, Chris Islam, Zahra F Bay, Sean K
Published in
Trends in microbiology
Molecular hydrogen (H2) is available in trace amounts in most ecosystems through atmospheric, biological, geochemical, and anthropogenic sources. Aerobic bacteria use this energy-dense gas, including at atmospheric concentrations, to support respiration and carbon fixation. While it was thought that aerobic H2 consumers are rare community members, ...
Nitzsche, Leonard Goldschmidt, Jens Lambrecht, Armin Wöllenstein, Jürgen
Ein Doppel-Frequenzkamm-Spektrometer wird für die parallele Detektion von Lachgas (N2O) und Kohlenstoffmonoxid (CO) verwendet. Die Gase weisen überlappende Absorptionen im mittleren Infrarot (MIR) bei einer Wellenlänge von 4.6 µm auf. Die Akquisitionsrate der Spektren von 10 Hz erlaubt es die Konzentrationen von 50 ppm N2O und 30 ppm CO mit einer r...
Ortiz, Maximiliano Leung, Pok Man Shelley, Guy Jirapanjawat, Thanavit Nauer, Philipp A Van Goethem, Marc W Bay, Sean K Islam, Zahra F Jordaan, Karen Vikram, Surendra
...
Published in
Proceedings of the National Academy of Sciences of the United States of America
Numerous diverse microorganisms reside in the cold desert soils of continental Antarctica, though we lack a holistic understanding of the metabolic processes that sustain them. Here, we profile the composition, capabilities, and activities of the microbial communities in 16 physicochemically diverse mountainous and glacial soils. We assembled 451 m...
Chiri, Eleonora Nauer, Philipp A Lappan, Rachael Jirapanjawat, Thanavit Waite, David W Handley, Kim M Hugenholtz, Philip Cook, Perran L M Arndt, Stefan K Greening, Chris
...
Published in
Proceedings of the National Academy of Sciences of the United States of America
Organoheterotrophs are the dominant bacteria in most soils worldwide. While many of these bacteria can subsist on atmospheric hydrogen (H2), levels of this gas are generally insufficient to sustain hydrogenotrophic growth. In contrast, bacteria residing within soil-derived termite mounds are exposed to high fluxes of H2 due to fermentative producti...
Rupp, Danielle L Lamit, Louis J Techtmann, Stephen M Kane, Evan S Lilleskov, Erik A Turetsky, Merritt R
Published in
Applied and environmental microbiology
Hydrologic shifts due to climate change will affect the cycling of carbon (C) stored in boreal peatlands. Carbon cycling in these systems is carried out by microorganisms and plants in close association. This study investigated the effects of experimentally manipulated water tables (lowered and raised) and plant functional groups on the peat and ro...