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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

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

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

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

Improvements of poly(3-hydroxybutyrate) production in an air-lift reactor using simple production media

Background: Halomonas boliviensis is a halophilic microorganism that accumulates poly(3-hydroxybutyrate) (PHB) using different carbons sources when nitrogen is depleted from the culture medium. This work presents an improved production of PHB using an air-lift reactor (ALR) that was fed with a concentrated solution of a carbon source, and was supplemented with an adequate airflow rate. Results: Si

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

Cultivation strategies for production of (R)-3-hydroxybutyric acid from simultaneous consumption of glucose, xylose and arabinose by Escherichia coli

Background: Lignocellulosic waste is a desirable biomass for use in second generation biorefineries. Up to 40% of its sugar content consist of pentoses, which organisms either take up sequentially after glucose depletion, or not at all. A previously described Escherichia coli strain, PPA652ara, capable of simultaneous consumption of glucose, xylose and arabinose was in the present work utilized fo

Subversive Mobilities and Vernacular Legal Navigation: Uzbek Migrants in Nordic Migration Regimes

This article examines the subversive mobilities and vernacular legal navigation of Uzbek migrants in Finland and Sweden, highlighting their tactical responses to restrictive Nordic migration regimes. Drawing on ethnographic fieldwork (2022–2025), including interviews, focus groups and digital ethnography, we explore how migrants with precarious statuses navigate legal ambiguity, administrative opa

Anticipation matters: sex differences in head acceleration responses and implications for sport-related concussion

IntroductionSport-related concussion (SRC) is a major health concern in contact sports. Linear head acceleration (LHA) and rotational head acceleration (RHA) are central biomechanical markers, and anticipatory neck muscle activation may mitigate these forces. Evidence on how anticipation influences head kinematics, and whether sex differences exist, remains limited. This study compared head accele

Long-term SARS-CoV-2 surveillance in the wastewater of Stockholm : What lessons can be learned from the Swedish perspective?

Wastewater-based epidemiology (WBE) can be used to track the spread of SARS-CoV-2 in a population. This study presents the learning outcomes from over two-year long monitoring of SARS-CoV-2 in Stockholm, Sweden. The three main wastewater treatment plants in Stockholm, with a total of six inlets, were monitored from April 2020 until June 2022 (in total 600 samples). This spans five major SARS-CoV-2

Discovery of sulfonamide resistance genes in deep groundwater below Patna, India

Global usage of pharmaceuticals has led to the proliferation of bacteria that are resistant to antimicrobial treatments, creating a substantial public health challenge. Here, we investigate the emergence of sulfonamide resistance genes in groundwater and surface water in Patna, a rapidly developing city in Bihar, India. We report the first quantification of three sulfonamide resistance genes (sulI

Low-Intensity, Home-Based Learning Interventions for 11–17-Year-Olds in Family Foster Care : A Scoping Review

This is a scoping review of low-intensity, home-based interventions promoting learning for 11–17-year-olds in foster care. Research shows that children in out-of-home care fall behind in school compared to their peers. Interventions to improve learning outcomes for these children typically i) target young children or children aging out of care, and ii) require many resources to implement. Lo