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In attosecond physics, pump-probe experiments have been a promising tool to study the fundamental light-matter interaction process of photoionization. In this context, photoelectron spectroscopy is used to spatially and temporally characterize the ejected photoelecron. Low repetition rates can be limited in resolution by space-charge effects \cite{spacecharge} and measurement statistics which can

Laminar burning velocity measurements of 50:50 and 85:15% (by volume) H-2-CO mixtures with O-2-N-2 and O-2-He oxidizers were performed at lean conditions (equivalence ratio from 0.5 to 1) and elevated pressures (1 atm-9 atm). The heat flux method (HFM) is employed for determining the laminar burning velocity of the fuel-oxidizer mixtures. HFM creates a one-dimensional adiabatic stretchless flame w

Integration of a third component into a single-junction polymer solar cell (PSC) is regarded as an attractive strategy to enhance the performance of PSCs. Although binary all-polymer solar cells (all-PSCs) have recently emerged with compelling power conversion efficiencies (PCEs), the PCEs of ternary all-PSCs still lag behind those of the state-of-the-art binary all-PSCs, and the advantages of ter

Thermal fluids is a multidisciplinary research area focusing on the behavior, interaction, and transport of heat, energy, and fluids. It encompasses topics like thermodynamics, fluid dynamics, and heat transfer, addressing challenges in energy systems, aerospace, manufacturing, and environmental engineering. Applications include cooling technolo-gies, combustion, renewable energy, and optimizing t

https://www.energy.lth.se/research/thermal-fluids - 2026-07-17

ETHANOL FUEL PRODUCTION AND USE IN KENYA FOR SUSTAINABLE DEVELOPMENT LUND UNIVERSITY International Masters Programme in Environmental Science ETHANOL FUEL PRODUCTION AND USE IN KENYA FOR SUSTAINABLE DEVELOPMENT A Thesis Submitted in Partial Fulfilment for the Award of a Master of Science Degree in Environmental Science at Lund University, Sweden Author: Supervisor: Leah Wanambwa Barry Ness LUMES L

https://www.lumes.lu.se/sites/lumes.lu.se/files/leah_wanambwa.pdf - 2026-07-17

Absorption and fluorescence spectral properties of J-aggregates of core-tetrasubstituted perylene bisimide (PBI) dyes have been investigated in the temperature range from 300 to 5 K. A special feature of the present PBI J-aggregates is that, in contrast to classical J-aggregates like that of pseudoisocyanine (PIC), the chromophores are held together not only by van-der-Waals interactions but also

The study of direct electron transfer between enzymes and electrodes is frequently hampered by the small fraction of adsorbed proteins that remains electrochemically active. Here, we outline a strategy to overcome this limitation, which is based on a hierarchical analysis of steady-state electrocatalytic currents and the adoption of the "binary activity" hypothesis. The procedure is illustrated by

In 2021, neutron structures of oxidised and reduced human manganese superoxide dismutase were published, suggesting several unexpected features, including deprotonated glutamate, tyrosine and histidine residues and a reduced Mn ion with two hydroxide ligands. We have used quantum refinement to evaluate whether alternative interpretations of the structures are possible, comparing many structural mo

Anion exchange membrane water electrolysis (AEMWE) has a great potential to be established as a high-performance and low-capital cost technology for hydrogen production. High current densities can be achieved with non-platinum group metal (non-PGM) catalyst. However, the harsh operation conditions require stable cell components. Here, we report on the use of a highly stable and ion conductive poly

The microorganism Cupriavidus necator is a very interesting bacterium that has been established as a model microorganism for its capability to produce polyhydroxyalkanoates, more specifically polyhydroxybutyrate (PHB), a potential precursor/raw material for bioplastics. Lately, the scientific community has raised interest in the chemolithoautotrophic nature of C. necator as it can be grown using C

Elförsörjningen som till huvuddel kommer från fossila bränslen uppfyller vanligen inte efterfrågan i Irak. Samtidigt som det finns goda förutsättningar och stor potential för att installera och utnyttja solel som en lösning för den bristande elförsörjningen men med omtanke som värnar om miljön. Idag har cirka 20 procent av den irakiska befolkningen ingen tillgång till el, de återstående 80 procentThe main supply of electricity from fossil fuels does not usually meet demand in Iraq. At the same time, there are good conditions and great potential for installing and utilizing environmental friendly electricity from solar energy as a solution to the lack of power supply. Today, about 20 percent of the Iraqi population has no access to electricity, the remaining 80 percent have no continuous el

Denna rapport utforskar konceptet undvikna utsläpp, även kallat Scope 4-utsläpp, som en del av företags hållbarhetsrapportering- och kommunikation. Med fokus på PowerCell Group, en leverantör av vätgasdrivna bränsleceller, undersöker studien hur Scope 4-utsläpp kan integreras i hållbarhetsrapportering och vilka möjligheter och utmaningar detta innebär. Undvikna utsläpp refererar till de minskningThis thesis explores the concept of Scope 4 emissions, also known as avoided emissions, within corporate sustainability reporting. With a focus on PowerCell Group, a provider of hydrogen fuel cell solutions, this study investigates the integration of avoided emissions reporting, assessing both the potential benefits and the challenges associated with this practice. Avoided emissions refer to redu

The affinity of AMD3100, a symmetrical nonpeptide antagonist composed of two 1,4,8,11-tetraazacyclotetradecane (cyclam) rings connected through a 1,4-dimethylene(phenylene) linker to the CXCR4 chemokine receptor was increased 7, 36, and 50-fold, respectively, by incorporation of the following: Cu2+, Zn2+, or Ni2+ into the cyclam rings of the compound. The rank order of the transition metal ions co

Hydrogen atom transfer (HAT) reactions by high-valent metal-oxo intermediates are important in both biological and synthetic systems. While the HAT reactivity of FeIV-oxo adducts has been extensively investigated, studies of analogous MnIV-oxo systems are less common. There are several recent reports of MnIV-oxo complexes, supported by neutral pentadentate ligands, capable of cleaving strong C-H b