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Increasing the production of (R)-3-hydroxybutyrate in recombinant Escherichia coli by improved cofactor supply
Background: In a recently discovered microorganism, Halomonas boliviensis, polyhydroxybutyrate production was extensive and in contrast to other PHB producers, contained a set of alleles for the enzymes of this pathway. Also the monomer, (R)-3-hydroxybutyrate (3HB), possesses features that are interesting for commercial production, in particular the synthesis of fine chemicals with chiral specific
Pure cultures for synthetic culture development : Next level municipal waste treatment for polyhydroxyalkanoates production
Polyhydroxyalkanoates (PHAs), as bio-based plastics, promise a transition from petroleum products to green and sustainable alternatives. However, their commercial production is yet impeded by high production costs. In this study, we assessed synthetic culture in mono and co-culture modes for bacterial PHA production. It was demonstrated that volatile fatty acids (VFAs) derived from food waste and
Hyperplex PCR enables highly multiplexed analysis of point mutations in wastewater : Long-term SARS-CoV-2 variant surveillance in Sweden as a case study
Wastewater-based surveillance (WBS) allows the analysis of pathogens, chemicals or other biomarkers in wastewater to derive unbiased epidemiological information at population scale. After re-gaining attention during the SARS-CoV-2 pandemic, the field holds promise as a surveillance and early warning system by tracking emerging pathogens with pandemic potential. Expanding the current toolbox of ana
Development and implementation of assays to monitor human adenovirus F40/41 in wastewater : Trends preceding, during, and following the non-A-to-E hepatitis outbreak in Stockholm
Human adenovirus (HAdV) type F41 has been identified as a possible cause of the non-A-to-E hepatitis outbreak. This study uses wastewater monitoring to track HAdV F40 and F41, supporting clinical investigations and providing insights into the pathogen's role in the outbreak. Given the limited clinical monitoring in Sweden of HAdV-F40/41, this approach also helps estimate the true infection burden
The effect of limited mobility on the experienced segregation of foreign-born minorities
Collisions without sight: head acceleration in blind football and implications for sport-related concussion
IntroductionSport-related concussion (SRC) is a pressing issue in Para sport, yet biomechanical mechanisms remain poorly understood. Athletes with visual impairment face elevated risks due to sport-specific demands, such as frequent collisions in blind football. This pilot study examined head acceleration responses in blind football players compared with non-disabled football players, and between
Regulating the production of (R)-3-hydroxybutyrate in Escherichia coli by N or P limitation
The chiral compound (R)-3-hydroxybutyrate (3HB) is naturally produced by many wild type organisms as the monomer for polyhydroxybutyrate (PHB). Both compounds are commercially valuable and co-polymeric polyhydroxyalkanoates have been used e.g., in medical applications for skin grafting and as components in pharmaceuticals. In this paper we investigate cultivation strategies for production of 3HB i
The impact of alcohol use disorder and PTSD comorbidity on risk of suicide attempt
Background: Alcohol use disorder (AUD) and posttraumatic stress disorder (PTSD) are frequently comorbid and are individually associated with increased risk of suicidal behavior. However, whether their comorbidity exacerbates this risk has not been adequately investigated. Methods: Using a Swedish birth cohort (born 1970–1990; N = 799,203–858,983), we employed Aalen’s linear hazards models to evalu
Empirical investigations of agreement in pancake constructions
In three empirical studies, we compare one syntactic and one semantic approach to agreement preferences in so-called pancake constructions (pcs) in Swedish, as in Senap är starkt ‘Mustard is strong’.pcs are either substance-denoting, naming an inherent property of the subject, or situation-denoting, naming a property of the subject that is linked to some event. These two types were found to differ
Futures and Critical AI Literacies : Resisting inevitability narratives through creative methods and critical pedagogy
What methods can foster critical and enduring literacies about tech-intensive futures? With the term “critical literacies,” we refer to forms of intervention grounded in critical theory and holding a “better futures” orientation, whether in relation to media, algorithmic, data or AI-based systems. The past decade has witnessed a groundswell of initiatives among practitioners across domainsto impro
The fate of severe acute respiratory syndrome coronavirus-2 and pepper mild mottle virus at various stages of wastewater treatment process
This study investigated the efficiency of the treatment processes of wastewater treatment plants (WWTPs) to remove severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and pepper mild mottle virus (PMMoV) from the wastewater and sewage sludge, as well as the influence of the mode of operation on the quality of the treated wastewater. SARS-CoV-2 and PMMoV were detected and quantified at dif
Comparison of engineered Escherichia coli AF1000 and BL21 strains for (R)-3-hydroxybutyrate production in fed-batch cultivation
Accumulation of acetate is a limiting factor in recombinant production of (R)-3-hydroxybutyrate (3HB) by Escherichia coli in high-cell-density processes. To alleviate this limitation, this study investigated two approaches: (i) deletion of phosphotransacetylase (pta), pyruvate oxidase (poxB), and/or the isocitrate lyase regulator (iclR), known to decrease acetate formation, on bioreactor cultivati
Waste to bioplastics : How close are we to sustainable polyhydroxyalkanoates production?
Increased awareness of environmental sustainability with associated strict environmental regulations has incentivized the pursuit of novel materials to replace conventional petroleum-derived plastics. Polyhydroxyalkanoates (PHAs) are appealing intracellular biopolymers and have drawn significant attention as a viable alternative to petrochemical based plastics not only due to their comparable phys
The role of the acyl-CoA thioesterase “YciA” in the production of (R)-3-hydroxybutyrate by recombinant Escherichia coli
Biotechnologically produced (R)-3-hydroxybutyrate is an interesting pre-cursor for antibiotics, vitamins, and other molecules benefitting from enantioselective production. An often-employed pathway for (R)-3-hydroxybutyrate production in recombinant E. coli consists of three-steps: (1) condensation of two acetyl-CoA molecules to acetoacetyl-CoA, (2) reduction of acetoacetyl-CoA to (R)-3-hydroxybu
Uncovering the social and spatial effects of fare cuts on public transport with mobile geolocation data
Editorial : Theory and practice of soccer psychology
Political Economy in Geographic Research: Institutionalist versus Marxist Approaches
Since the rise of radical geography in the early 1970s, political economy has been crucial in examining the spatial dynamics of capital in economic geography. Marxist and non-Marxist (particularly institutionalist) economic geographers use political economy to challenge non-political economy approaches that ignore the relationship between microeconomic processes and their spatial manifestations an
Caught in the coop: local labour control regimes in poultry supply chains under avian influenza
Outbreaks of highly pathogenic avian influenza (HPAI) pose an escalating threat to global poultry supply chains, with their management highlighting reconfigurations in economic geography through the increasing centrality of actors and processes beyond the farm-level. Taking HPAI outbreaks in Denmark as our empirical focus, we argue that outbreaks and their management reveal poultry growers’ lack o
Conceptual system for sustainable and next-generation wastewater resource recovery facilities
Shifting the concept of municipal wastewater treatment to recover resources is one of the key factors contributing to a sustainable society. A novel concept based on research is proposed to recover four main bio-based products from municipal wastewater while reaching the necessary regulatory standards. The main resource recovery units of the proposed system include upflow anaerobic sludge blanket
