Sökresultat

Filtyp

Din sökning på "*" gav 533394 sökträffar

Enhanced methane emissions from tropical wetlands during the 2011 la Niña

Year-to-year variations in the atmospheric methane (CH4) growth rate show significant correlation with climatic drivers. The second half of 2010 and the first half of 2011 experienced the strongest La Niña since the early 1980s, when global surface networks started monitoring atmospheric CH4 mole fractions. We use these surface measurements, retrievals of column-averaged CH4 mole fractions from GO

Dissociation of cyclopropane in double ionization continuum

Dissociative double photoionization of cyclopropane is studied in the inner-valence region using tunable synchrotron radiation. With the aid of ab initio quantum chemical calculations the energies of dication states and their favoured fragmentation pathways are determined. These are compared to the experimental appearance energies of two-body fragmentation processes and to the kinetic energy relea

How conflict affects land use: agricultural activity in areas seized by the Islamic State

Socio-economic shocks, technogenic catastrophes, and armed conflicts often have drastic impacts on local and regional food security through disruption of agricultural production and food trade, reduced investments, and deterioration of land and infrastructure. Recently, more research has focused on the effects of armed conflict on land systems, but still little is known about the processes and outSocio-economic shocks, technogenic catastrophes, and armed conflicts often have drastic impacts on local and regional food security through disruption of agricultural production and food trade, reduced investments, and deterioration of land and infrastructure. Recently, more research has focused on the effects of armed conflict on land systems, but still little is known about the processes and out

Caught in the Middle? : Young offenders in the Swedish and German criminal justice systems

How should we respond to a criminal offence committed by a young person? It is obvious that this is a very complex question. Multiple factors play important roles: the offence itself, but also the juvenile’s background in terms of education, socialization, prior convictions, etc. Every case is unique, but the criminal legal system has to follow the principles of legal certainty and predictability.How should we respond to a criminal offence committed by a young person? It is obvious that this is a very complex question. Multiple factors play important roles: the offence itself, but also the juvenile’s background in terms of education, socialization, prior convictions, etc. Every case is unique, but the criminal legal system has to follow the principles of legal certainty and predictability.

Initiating heavy-atom-based phasing by multi-dimensional molecular replacement

To obtain an electron-density map from a macromolecular crystal the phase problem needs to be solved, which often involves the use of heavy-atom derivative crystals and concomitant heavy-atom substructure determination. This is typically performed by dual-space methods, direct methods or Patterson-based approaches, which however may fail when only poorly diffracting derivative crystals are availab

A high-yield co-expression system for the purification of an intact Drs2p-Cdc50p lipid flippase complex, critically dependent on and stabilized by phosphatidylinositol-4-phosphate

P-type ATPases from the P4 subfamily (P4-ATPases) are energy-dependent transporters, which are thought to establish lipid asymmetry in eukaryotic cell membranes. Together with their Cdc50 accessory subunits, P4-ATPases couple ATP hydrolysis to lipid transport from the exoplasmic to the cytoplasmic leaflet of plasma membranes, late Golgi membranes, and endosomes. To gain insights into the structure

Copper-transporting P-type ATPases use a unique ion-release pathway

Heavy metals in cells are typically regulated by PIB-type ATPases. The first structure of the class, a Cu(+)-ATPase from Legionella pneumophila (LpCopA), outlined a copper transport pathway across the membrane, which was inferred to be occluded. Here we show by molecular dynamics simulations that extracellular water solvated the transmembrane (TM) domain, results indicative of a Cu(+)-release path

The correlation between regulatory conditions and antibiotic consumption within the WHO European Region

Background: In a global perspective, bacterial infections are still a major cause of morbidity and mortality; therefore, effective antibiotics are needed. However, the emergence of antibiotic resistance due to irrational use has now become a serious public health problem. Hence, the objective of this study was to analyse the association of regulatory aspects with antibiotic consumption. Methods: A

Factors for Adopting ERP as SaaS amongst SMEs: The Customers vs. Vendor Point of View

This paper identifies the factors for adopting Enterprise Resource Planning (ERP) delivered as Software-as-a-Service (SaaS) among small and medium enterprises (SMEs). The authors conducted a two phases' qualitative-methodology: interviews with 20 experts from SaaS vendor (Microsoft) and a case-study with executives in three organizations which implemented vendor's ERP as SaaS (customers). The vend

The gender wage-gap in Brazil and the role of discrimination

The gender pay-gap is not a new phenomenon in Brazil. Since the increase of female participation on the labor market, the gap has remained a persistent problem that has generated a wide range of studies on the topic. The Human Capital Theory argues that individuals’ education and on-the-job experience are essential determinants on wage estimations. This assessment is not disputed in the literature

'Patterns of Ecological and Aesthetic Co-evolution' : Tree-guitars, River-violins and the Ecology of Listening

The move 'outside' of the concert hall has repercussions for listening and creative practice beyond simply resituating 'music'. The building of an environmentally specific instrumentarium draws on in situ exploration and cultivation of affordances, but also on the embodied pre-existent knowledge of the artists concerned. A sense of space/place and strategies of listening work together both to situ

The sounds of Hanoi and the after-image of the homeland

This paper discusses the soundscape of Hanoi and of the countryside north of Hanoi in the Bac Ninh province with the experience of the two authors as artists in two collaborative projects, Arrival Cities: Hanoi and Que/Homelands. The content is structured in three layers, a conversation between the two authors on their individual experience of the projects, a jointly written text which takes a mor

STATISTICAL ANALYSIS OF EXTREME SEA WATER LEVELS AT THE FALSTERBO PENINSULA, SOUTH SWEDEN

Falsterbo Peninsula on the south coast of Sweden is low-lying and exposed to flooding. In 1872 the extremestorm surge Backafloden caused large devastation on the Swedish, Danish, and German coasts in the SouthBaltic Sea. For the Falsterbo Peninsula, the peak storm surge level is estimated to have been 240 cm abovenormal. If a similar event happened today, the consequences would be far worse, as exFalsterbo Peninsula on the south coast of Sweden is low-lying and exposed to flooding. In 1872 the extreme storm surge Backafloden caused large devastation on the Swedish, Danish, and German coasts in the South Baltic Sea. For the Falsterbo Peninsula, the peak storm surge level is estimated to have been 240 cm above normal. If a similar event happened today, the consequences would be far worse, as

The Escherichia coli CysZ is a pH dependent sulfate transporter that can be inhibited by sulfite

The Escherichia coli inner membrane protein CysZ mediates the sulfate uptake subsequently utilized for the synthesis of sulfur-containing compounds in cells. Here we report the purification and functional characterization of CysZ. Using Isothermal Titration Calorimetry, we have observed interactions between CysZ and its putative substrate sulfate. Additional sulfur-containing compounds from the cy

Structural basis for the autoinhibition of the C-terminal kinase domain of human RSK1

p90 ribosomal S6 kinases (RSKs) respond to various mitogen stimuli and comprise two distinct protein kinase domains. The C-terminal kinase domain (CTKD) receives signal from ERK1/2 and adopts an autoinhibitory mechanism. Here, the crystal structure of human RSK1 CTKD is reported at 2.7 Å resolution. The structure shows a standard kinase fold, with the catalytic residues in the ATP-binding cleft or