Published 1 November 2022 Recording of person coughing. The velocity and sizes of the found droplets are shown later in the movie. When we cough and speak we launch droplets and if the person launching these droplets is sick from some kind of virus disease, such as COVID19, the droplets can contain viruses. These viruses have been found to be one of the main contributors to the spreading of the pa

https://www.combustionphysics.lu.se/article/coughed-droplets-estimating-size-and-speed - 2025-07-03

Published 1 November 2022 Here, a wild boar lung is used as a model similar to the lungs of a human child. A diode laser is used to check if the lung is filled with air. Throughout life, our lungs are vital organs. For newborns as well as for elderly patients, there is a need for safe and continuous lung monitoring in the healthcare. Some of today's common methods of examining the lungs, such as X

https://www.combustionphysics.lu.se/article/measuring-oxygen-lungs-lasers-finished-master-project - 2025-07-03

Published 9 January 2023 Left image is the Lund university logo imaged through milk that makes it blurred to almost invisible. Right is the reconstruction shown in this work to extract the logo details. You are out in the woods taking your new profile picture when suddenly a fog rolls in. First you think it is mystical and perfect, but it is so thick that you just look like a blurry blob in the pi

https://www.combustionphysics.lu.se/article/seeing-through-fog-looking-straight-finished-master-project - 2025-07-03

Published 24 January 2023 TEM image of soot aggregate. Soot is generated from incomplete combustion or pyrolysis of organic compounds. Soot strongly absorbs solar radiation contributing to global warming. Additionally, soot can enter deeply into human organs causing various types of cancers. Understanding soot nano-structures and properties is essential to predict their impacts on climate and huma

https://www.combustionphysics.lu.se/article/using-surface-enhanced-raman-spectroscopy-sers-and-resonant-raman-spectroscopy-characterize-soot - 2025-07-03

Published 25 January 2023 Observing soot oxidation during thermal treatment by a LINKAM heating stage. Soot is a light-absorbing material that is formed when hydrocarbons are not completely burned during combustion processes. Soot has significant impacts on climate, glacial regions, agriculture, and human health due to its strong light-absorbing ability, small size and complex structure. Various s

https://www.combustionphysics.lu.se/article/studying-soot-thermo-optical-properties-suggested-thesis-project - 2025-07-03

Published 27 January 2023 On the left are the images used to 3D reconstruct the liquid surface shown on the right. When you are cleaning your car with your high-pressure washer have you ever considered how it works? Well we have and to figure that out we need to see how the liquid looks like in 3D. As is seen in the video above we have 3D reconstructed the surface of a cone-like liquid using a tec

https://www.combustionphysics.lu.se/article/extracting-3d-structure-liquid-surfaces - 2025-07-03

Published 25 February 2023 Insects are essential to the natural world, playing a vital role in maintaining ecosystem processes and providing valuable ecosystem services. However, studying insect biodiversity has proven challenging and labor-intensive since current methods use manually emptied traps. We recognized the need for a powerful and efficient tool to study insect abundance and richness in

https://www.combustionphysics.lu.se/article/using-lidar-measure-biodiversity-insects-tai-rainforest - 2025-07-03

Published 1 August 2022 We are around 70 people who are working with everything from insects to catalysis with combustion in between. Read our other articles to learn more about our activities.

https://www.combustionphysics.lu.se/article/division - 2025-07-03

Published 21 March 2023 Candle light (left figure) emitting yellow light which originates from hot soot particles, such as the one shown in the right figure. Probably you have looked into a candle light and been fascinated by the high intensity of the yellow light! Have you ever been thinking about the origin of this light? This brilliant light actually comes from nano-meter sized carbonaceous par

https://www.combustionphysics.lu.se/article/soot-particles-remnants-incomplete-combustion - 2025-07-03

Published 29 March 2023 Here, a wild boar lung is used as a model similar to the lungs of a human child. A diode laser is used to check if the lung is filled with air. Did you know that lung complications are the most common cause of death for preterm infants, and that problems with lungs are one of the most serious complications that can happen when children are sedated for surgery? The aim of th

https://www.combustionphysics.lu.se/article/use-lasers-see-if-your-lungs-are-working - 2025-07-03

Published 19 April 2023 Detecting aerosol soot using Online Raman spectrosopy with a multi-pass configuration (Taken by Kim Cuong Le) Soot can be emitted from both natural and anthropogenic sources, including mineral deposits, open forest fires, savanna burnings, biomass burning, residential burning, and fossil fuel combustion. It absorbs solar radiation and contributes to atmospheric heating. Soo

https://www.combustionphysics.lu.se/article/quantitative-and-qualitative-measurements-aerosol-soot-using-laser-based-techniques - 2025-07-03

Published 20 April 2023 Turbulent ammonia flame. The contribution of carbon dioxide emissions from combustion to global warming is well known. How can this be mitigated? One way is carbon-free combustion with hydrogen. But how about challenges with hydrogen handling, storage and distribution? Combustion of hydrogen (H2) can provide energy without net carbon dioxide emissions contributing to global

https://www.combustionphysics.lu.se/article/ammonia-fuel-and-hydrogen-carrier - 2025-07-03

Published 20 April 2023 A gas turbine is a combustion engine that can convert fuel to mechanical power. This mechanical power can be used for producing electric power and generating thrust in a jet aircraft. We are all well familiar with climate change, global warming and the urgent need to reduce greenhouse gases. The use of hydrogen in the process industry, e.g., for steel production, in the pow

https://www.combustionphysics.lu.se/article/hydrogen-operation-siemens-industrial-gas-turbines - 2025-07-03

Published 20 April 2023 A 3D volume of a whole cleared mouse brain captured with a prototype SILMAS instrument at 2 µm isotropic resolution. We are working in close collaboration with neuroscientists from the B.R.A.I.N.S unit at the Biomedical Center to develop techniques for 3D imaging of cleared mouse brain tissue. These techniques will assist their research on Parkinson’s and Alzheimer’s diseas

https://www.combustionphysics.lu.se/article/advanced-microscopy-imaging-whole-mouse-brains-3d - 2025-07-03

Published 28 April 2023 Our group works with medical laser diagnostics, specifically aimed at monitoring of oxygen in lungs using the GAs in Scattering Media Absorption Spectroscopy (GASMAS) technique. This has found successful application in the monitoring of the lung function for preterm infants, where careful monitoring of spatially distributed oxygen content can lead to optimal respiratory sup

https://www.combustionphysics.lu.se/article/monitoring-oxygen-lungs-using-light-amplification-suggested-thesis-project - 2025-07-03

Published 21 April 2023 Esophagus cancer is treated with surgery by stitching the upper stomach together with the healthy part of the esophagus. An optical fiber can send light down the esophagus to look for problems occurring after the surgery. Imagine you had to get surgery due to esophagus cancer. Initially, you seem to recover well, but suddenly you are rushed to emergency surgery. The wound h

https://www.combustionphysics.lu.se/article/method-measuring-healing-after-surgery - 2025-07-03

Published 21 April 2023 Lasers can be used to look inside a flame and tell us what happens when things burn. How can we stop global warming? Simple: we need to stop burning fossil fuels. Unfortunately, it is difficult to replace fossil fuels in all parts of society. In this project, we develop laser techniques that can help us understand the how energy is produced when different things burn, which

https://www.combustionphysics.lu.se/article/lasers-will-help-us-discover-fuels-tomorrow - 2025-07-03

Published 21 April 2023 Hollow-cone spray illuminated using a laser with a stripy structure (lines seen on the left edge). Most milk powders you buy have been produced through spray drying. This means that the milk after some preprocessing is injected under high-pressure through a small hole into a warm room. Then almost instantly, the liquid evaporates leaving the powder. The final product now ha

https://www.combustionphysics.lu.se/article/improving-food-spray-drying-tetra-pak - 2025-07-03

Published 24 April 2023 This video shows backward and forward lasing signals from oxygen atoms in a flame recorded in real time. The forward lasing signal is stronger, but of limited diagnostic value. Ever since it was invented in the 1960s, the laser has found new areas of use, and is today very useful in research, industry and society. In most laser applications, for example material processing,

https://www.combustionphysics.lu.se/article/backward-lasing-breakthrough-remote-sensing - 2025-07-03

Av webmaster [at] fysik [dot] lu [dot] se (Jonas Andersson) - publicerad 12 januari 2021 Den övre delen representerar experimentet med laser som lyser på 2D-fällan med atomer. På den nedre delen kan man se hur atomerna agerar då de parar ihop sig, medan vattnet representerar deras egenskaper som suprafluider. Illustration: Jonas Ahlstedt, Lun Genom att studera kalla atomer har forskare på ett unik

https://www.fysik.lu.se/artikel/unik-observation-av-forstadium-till-higgsmekanismen - 2025-07-03