Search results

Filter

Filetype

Your search for "*" yielded 529653 hits

The curious stability of candidate selection methods in Belgium in times of crisis

This chapter analyses a ‘negative case’ of change in candidate section. Although one expects the political crisis to trigger the emergence of new parties – and together with them of innovative (inclusive) forms of candidate selection, no major reform of internal party democracy has been observed in Belgium. The last decades have witnessed the rise of new parties, but these rather tend to select th

Candidates, Parties and Voters in the Belgian Partitocracy

A black box in the study of representation in European democracies is our knowledge about elected but also unelected candidates. What is their background? How are they recruited? What are their campaign aims, strategies, resources and tools? How do they relate to their (constituency and central) party and their voters? How do they consider democratic governance at national and European levels? Thi

Contrasting patterns of Andean diversification among three diverse clades of Neotropical clearwing butterflies

The Neotropical region is the most biodiverse on Earth, in a large part due to the highly diverse tropical Andean biota. The Andes are a potentially important driver of diversification within the mountains and for neighboring regions. We compared the role of the Andes in diversification among three subtribes of Ithomiini butterflies endemic to the Neotropics, Dircennina, Oleriina, and Godyridina.

Nucleation-limited composition of ternary III-V nanowires forming from quaternary gold based liquid alloys

We derive an analytic expression for the composition of a ternary solid material nucleating from a quaternary liquid melt. The calculations are based on the two-component nucleation theory with realistic descriptions of the liquid and solid phases. We apply this theory to gold-catalyzed, nucleation limited vapor-liquid-solid growth of ternary III-V nanowires. We consider ternary gallium, indium, a

Mitophagy : A Mechanism for Plant Growth and Survival

Mitophagy is a conserved cellular process that is important for autophagic removal of damaged mitochondria to maintain a healthy mitochondrial population. Mitophagy also appears to occur in plants and has roles in development, stress response, senescence, and programmed cell death. However, many of the genes that control mitophagy in yeast and animal cells are absent from plants, and no plant prot

A base-stock inventory model with service differentiation and response time guarantees

In response to customer specific service time guarantee requirements, service providers can offer differentiated services. Although response time agreements offer more flexibility, most of the theoretical models for customer differentiation are based on fill rates, due to the difficulty of calculating the response time distribution in the presence of priorities. In this paper we focus on the (S−1,

Using pine bark and mussel shell amendments to reclaim microbial functions in a Cu polluted acid mine soil

An extremely acid mine soil polluted with Cu was amended with pine bark, crushed mussel shell or a 1:1 mixture of these two by-products. The performance of the soil microbial community was measured as the bacterial and fungal community growth, which were monitored during 2 years following the amendments. Pine bark caused significant increases of microbial growth rates, but with distinct difference

Sunlight photocurrent generation from thylakoid membranes on gold nanoparticle modified screen-printed electrodes

In this work we report on the increase in photocurrent obtained by using thylakoid membranes “wired” with an osmium redox polymer (OsRP) immobilized onto screen-printed carbon and gold electrodes (SPCEs and SPAuEs), modified with gold microparticles (AuMPs) and gold nanoparticles (AuNPs). Both AuMPs and AuNPs were electrodeposited by using the same electrodeposition method in order to study the in

Did mangrove communities exist in the Late Cretaceous of the Kristianstad Basin, Sweden?

Previous inferences of oyster-dominated communities occupying mangrove-like depositional settings in the Kristianstad Basin, Sweden, during the late early Campanian are reassessed. A significant percentage of oysters (Acutostrea incurva) from the Belemnellocamax mammillatus zone in Bed 3 at Åsen bear indentations on their left valves indicating attachment to plant axes. Many of these axes bear mor

Exposure to perfluoroalkyl substances during pregnancy and child behaviour at 5 to 9 years of age

We examined associations between prenatal exposure to perfluorohexane sulfonic acid (PFHxS), perfluoroheptanoic acid (PFHpA), perfluorononanoic acid (PFNA), and perfluorodecanic acid (PFDA) - and child behaviour (SDQ-total) and hyperactivity (sub-scale) at 5–9 years of age in birth cohorts from Greenland and Ukraine. Pregnancy serum samples (N = 1023) were analysed for perfluoroalkyl substances (P

On the Calculation of SAXS Profiles of Folded and Intrinsically Disordered Proteins from Computer Simulations

Solution techniques such as small-angle X-ray scattering (SAXS) play a central role in structural studies of intrinsically disordered proteins (IDPs); yet, due to low resolution, it is generally necessary to combine SAXS with additional experimental sources of data and to use molecular simulations. Computational methods for the calculation of theoretical SAXS intensity profiles can be separated in

Evidence for archaeal methanogenesis within veins at the onshore serpentinite-hosted Chimaera seeps, Turkey

Serpentinite-hosted ecosystems are potential sites where life may first have evolved on Earth. Serpentinization reactions produce strongly reducing and highly alkaline fluids that are typified by high concentrations of molecular hydrogen (H2) and methane (CH4), which can be used as an energy source by chemosynthetic life. Low-temperature serpentinization at slow-spreading mid-ocean ridges provides

Baculovirus-driven protein expression in insect cells : A benchmarking study

Baculovirus-insect cell expression system has become one of the most widely used eukaryotic expression systems for heterologous protein production in many laboratories. The availability of robust insect cell lines, serum-free media, a range of vectors and commercially-packaged kits have supported the demand for maximizing the exploitation of the baculovirus-insect cell expression system. Naturally

De facto governance: how authoritative assessments construct climate engineering as an object of governance

Analyses of climate engineering (CE) governance have accelerated in the last decade. A key claim is that CE remains a largely ungoverned space, with shared norms, institutional arrangements, and formal rules to regulate CE not yet present. In contrast, here it is argued that de facto governance of CE is underway, discernible in an ordering of this nascent field of inquiry by unacknowledged sources

Father’s Repeat Migration and Children’s Educational Performance

Repeat migration is a common, but unstudied, pattern of migration. This study examines the potential intergenerational consequences of this behavior. To investigate this, we estimate the effect of fathers’ repeat migration on their children’s grade point averages using population-level register data from Sweden. We find that the children of fathers who repeat migrate have a significantly lower gra

Structural modelling of the DNAJB6 oligomeric chaperone shows a peptide-binding cleft lined with conserved S/T-residues at the dimer interface

The remarkably efficient suppression of amyloid fibril formation by the DNAJB6 chaperone is dependent on a set of conserved S/T-residues and an oligomeric structure, features unusual among DNAJ chaperones. We explored the structure of DNAJB6 using a combination of structural methods. Lysine-specific crosslinking mass spectrometry provided distance constraints to select a homology model of the DNAJ

A comprehensive map coupling histone modifications with gene regulation in adult dopaminergic and serotonergic neurons

The brain is composed of hundreds of different neuronal subtypes, which largely retain their identity throughout the lifespan of the organism. The mechanisms governing this stability are not fully understood, partly due to the diversity and limited size of clinically relevant neuronal populations, which constitute a technical challenge for analysis. Here, using a strategy that allows for ChIP-seq

Dimensionless analysis on liquid-liquid flow patterns and scaling law on slug hydrodynamics in cross-junction microchannels

Liquid-liquid flow patterns and slug hydrodynamics were experimentally studied in non-circular glass microchannels with water-butanol, water-toluene, water–oil and water-hexane systems, considering various hydraulic diameters (600 µm, 400 µm, 200 µm), inlet junctions (crossed, T) and aspect ratios (0.5, 1). The aqueous phase was the continuous phase due to the hydrophilic microchannel walls and th