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During amino acid starvation the Escherichia coli stringent response factor RelA recognizes deacylated tRNA in the ribosomal A-site. This interaction activates RelA-mediated synthesis of alarmone nucleotides pppGpp and ppGpp, collectively referred to as (p)ppGpp. These two alarmones are synthesized by addition of a pyrophosphate moiety to the 3 position of the abundant cellular nucleotide GTP and
Local commercial fishing is often claimed to attract tourists to coastal communities. We investigate the impact of local fishing on tourism demand, measured as overnight stays, in Sweden. Using municipal-level data for the period 1998–2015, we perform a quantitative analysis using ordinary least squares (OLS) as well as panel-data methods that take unobserved heterogeneity between municipalities i
A real-time kernel which supports concurrent programming in Pascal is described. It implements semaphores for mutual exclusion and events for other synchronization. The kernel also offers the possibility to program I/O handlers. The kernel is written in Pascal, but relies on a small number of assembly written procedures for process creation, transfer between processes and handling of interrupts. T
Mitigating climate change will affect energy systems and have consequences that reach beyond environmental policies. The studies presented in this thesis analyse how reducing emissions of greenhouse gases affect (energy) security. The focus is on strategies which improve energy efficiency or increase the share of renewable energy.This thesis is based on five papers in which frameworks for conceptu
Someone who throws away their rubbish on a street-corner or in a ditch is guilty of sloth. This may appear harmless, but seen through the lens of waste management, sloth soon develops into a deadly sin that harms other people’s lives and health. Hiding and forgetting waste has always been a practice with potentially disastrous consequences; buried containers full of toxins will eventually start to
The focus of this study was exploring the product development process of a dairy- based drink which was co-created within a public-private partnership approach for Base of Pyramid (BoP) consumers in Zambia. An exploratory case-study research design was selected. Through interviews, documentation and observations, the steps of the product development process were mapped and the contributions from t
In response to the challenges of their local environments, organisms produce of a large number of chemical diverse compounds with complex stereochemistry and reactive functional groups. These characteristics enable them to interact and bind specifically to biological target molecules and exert various biological activities, and have assured that Natural products continues to be an important source
With the projected increase in the number of hydrogen-fueled trucks, it can be expected that it will become more common for such vehicles to be involved in road collisions. Even if hydrogen vehicles are designed with a quick-closing valve on tanks in accordance with UN/ECE R134, a small volume of hydrogen will be contained downstream of this valve and in the fuel-cell recirculation system and ther
MILJÖVETENSKAP Preliminärt schema 171018 Kurs: MVET01 Kursansvarig: Charlotte Leire Lärare: Charlotte Leire, Julia Nussholz, Katherine Whalen, Philip Peck och Torbjörn Brorson. Gästföreläsare: Åke Thidell, Christina Windmark, Martin Kurdve, Murat Mirata, Anna Bruun Månsson, Lars Strupeit och Alexander Lidgren. Lokaler: Ekologihuset och till viss del IIIEE Litteratur: Se läslistor på LUVIT Studiete
https://www.cec.lu.se/sv/sites/cec.lu.se.sv/files/schema_mvet01_ht17_171017.pdf - 2026-07-21
