Sökresultat

Given the photocatalytic properties of semiconducting polymers and carbon quantum dots (CQDs), we report a new structure for a metal-free photocatalytic system with a promising efficiency for hydrogen production through the combination of an organic semiconducting polymer (PFTBTA) and N-doped carbon quantum dots (NCQDs) covered by PS-PEGCOOH to produce heterostructured photocatalysts in the form o

Thermodynamic uncertainty relations quantify how the signal-to-noise ratio of a given observable is constrained by dissipation. Fluctuation relations generalize the second law of thermodynamics to stochastic processes. We show that any fluctuation relation directly implies a thermodynamic uncertainty relation, considerably increasing their range of applicability. In particular, we extend thermodyn

We present a real-time study of protein crystallization of bovine-lactoglobulin in the presence of CdCl2 using small-angle X-ray scattering and optical microscopy. From observing the crystallization kinetics, we propose the following multistep crystallization mechanism that is consistent with our data. In the first step, an intermediate phase is formed, followed by the nucleation of crystals withi

Laminar burning velocity of lean methane/air flames exposed to pulsed microwave irradiation is determined experimentally as part of an effort to accurately quantify the enhancement resulting from exposure of the flame to pulsed microwaves. The experimental setup consists of a heat flux burner mounted in a microwave cavity, where the microwave has an average power of up to 250 W at an E-field in th

The secretion of alpha 1-microglobulin by primary cultures of rat hepatocytes was found to increase upon the addition of interleukin-6 or leukemia inhibitory factor, two mediators of acute phase response. This stimulatory effect was further enhanced by dexamethasone. alpha 1-Microglobulin is synthesized as a precursor also containing bikunin, and the precursor protein is cleaved shortly before sec

Lead-free perovskite nanocrystals (NCs) were obtained mainly by substituting a Pb2+ cation with a divalent cation or substituting three Pb2+ cations with two trivalent cations. The substitution of two Pb2+ cations with one monovalent Ag+ and one trivalent Bi3+ cations was used to synthesize Cs2AgBiX6 (X=Cl, Br, I) double perovskite NCs. Using femtosecond transient absorption spectroscopy, the char

Excessive amounts of cobalt are cardiotoxic, although the mechanism for this toxicity remains unclear. We studied the effects of acute cobalt exposure on the activities of free radical scavengers in the myocardium in 5 groups of rats. Six rats served as a control group and were given a daily subcutaneous injection of 1 ml saline for 8 days. The other 4 groups of rats received a daily injection sub

Using an extended Kaya decomposition, we identify the drivers of long-run CO₂ emissions since 1800 for Denmark, France, Germany, Italy, the Netherlands, Portugal, Spain, Sweden, the UK, the United States, Canada and Japan. By considering biomass and carbon-free energy sources along with fossil fuels, we are able to shed light on the effects of past and present energy transitions on CO₂ emissions.

In multipath routing, maximization of the cardinality K of the disjoint-path set for a given source and destination assuming an upper bound on the differential delay D is one of the key factors enabling its practical applications. In the paper we study such an optimization problem for multipath routing involving maximization of K under the D constraint as the primary objective, and then minimizati

Course analysis GeoN06, autumn 2019 Course leader: Anne Birgitte Nielsen GeoN06 is a master’s level course open to students from geology, archaeology, geography, biology and related subjects. The course is built around a project work running through the course and a series of lectures by different teachers, with different specializations within paleoecology and related methodologies. All seven stu

https://www.geology.lu.se/sites/geology.lu.se/files/geon06_course_analysis_ht2019.pdf - 2026-05-08

EvalBior25autumn2018 Sida 1 av 2 Biologiska institutionen Grund- och avancerad utbildning KURSSAMMANSTÄLLNING Datum 2020-10-26 Kursansvarig: Staffan Bensch, Helena Westerdahl Antal studenter: 23 Betyg: 1 student UK, 11 students G, 11 students VG Sammanställt av: Staffan Bensch, Helena Westerdahl Course analysis BIOR25 Molecular Ecology and Evolution, autumn 2018 Summary of the course evaluation Nu

https://www.biology.lu.se/sites/biology.lu.se/files/2021-01/evalbior25autumn2018.pdf - 2026-05-08

Shallow geothermal offers great potential to supply emission-free heating and cooling and has therefore a pivotal role in the transition of heating and cooling networks. This paper presents a novel heating and cooling network with possible geothermal energy sharing between decentralized borefields located at each building level. The system consolidates the benefits of both standalone and centraliz

Hydrogen peroxide treatment is a cost-effective and simple method to improve the bioactivity of titanium implants. In this study, the effects of chloride ion concentration and temperature of hydrogen peroxide on the surface treatment of titanium were investigated using X-ray diffractometry (XRD), Field Emission-Scanning Electron Microscopy (FESEM), and tests in order to determine wettability and a

Picosecond ultrasonics, which studies laser-induced high-frequency strain waves, is a reliable and versatile method for nondestructive materials' characterization. Strain waves are generated through a light interaction with charges and their subsequent relaxation, and these waves conceal a wealth of information on the material. However, strain waves are detected through their convolution with a se

The possibility of imaging single proteins constitutes an exciting challenge for x-ray lasers. Despite encouraging results on large particles, imaging small particles has proven to be difficult for two reasons: not quite high enough pulse intensity from currently available x-ray lasers and, as we demonstrate here, contamination of the aerosolized molecules by nonvolatile contaminants in the soluti

Syftet med denna översiktsartikel är att sätta in matdistribution till personeri fattigdom i ett sammanhang, för att bättre förstå dess betydelse för mottagare,civilsamhällesorganisationer och i förlängningen även välfärdsmodelleni Sverige. Artikeln synliggör en förändring där ett ökat behov av kostnadsfrieller billig mat för fattiga grupper möts av ett ökat utbud av mat distribuerat avcivilsamhäl

A radical transformation of the transport industry is required in order to achieve a fossil-fuel-free vehicle fleet and reach the greenhouse gas emissions goals. Electrification plays a crucial role in this radical process. An electric road system (ERS) is a road that supplies power to electric vehicles as they drive on it, offering numerous advantages. These include an extended driving range, dec

This chapter focuses on industrialization and family behavior during the twentieth century against the backdrop of economic and institutional change. It documents trends regarding marriage and fertility and union dissolution from a gender perspective, and explores the role of socioeconomic status (SES) for these processes. Findings confirm patterns regarding gender and family consistent with that