Sökresultat

Filtyp

Din sökning på "*" gav 538377 sökträffar

Improving the indoor air quality by using a surface emissions trap for exposure reduction

A prototype of a surface emissions trap, a new device for reducing emissions of volatile organic compounds and particulate matter from surfaces while allowing evaporation of moisture, was used to improve the indoor air quality of a school building with elevated air concentrations of 2-ethyl-1-hexanol. A clear improvement of the perceived air quality was noticed a few days after the trap had been a

Plant-wide model-based analysis of iron dosage strategies for chemical phosphorus removal in wastewater treatment systems

Stringent phosphorus discharge standards (i.e. 0.15–0.3 g P.m −3 ) in the Baltic area will compel wastewater treatment practice to augment enhanced biological phosphorus removal (EBPR) with chemical precipitation using metal salts. This study examines control of iron chemical dosing for phosphorus removal under dynamic loading conditions to optimize operational aspects of a membrane biological r

Impact of molecular linker size on physicochemical properties of assembled gold nanoparticle mono-/multi-layers and their applicability for functional binding of biomolecules

In this work the impact of molecular inter-linker size on gold nanoparticle (AuNP) mono-/multilayer structural properties, density and homogeneity has been investigated. These characteristics are of great importance for functional binding of biomolecules. Positively charged high or low molecular weight inter-linkers, poly-L-lysine (PLL) or N-(6-mercapto)hexylpyridinium (MHP), were used to attach n

Antipsychotic Treatment Associated With Increased Mortality Risk in Patients With Dementia. A Registry-Based Observational Cohort Study

Objective: To assess all-cause mortality patients with dementia treated with typical and atypical antipsychotic drugs (APDs). Design: Registry-based cohort study. Setting and participants: A total of 58,412 patients diagnosed with dementia and registered in the Swedish Dementia Registry were included in the study. Of the study sample, 2526 of the patients were prescribed APDs. Of these, 602 patien

On the invisible socio-technical systems - The great unknown

Energy is an important social resource on which we depend in our everyday lives; however, energy-related emissions constitute a major environmental load, so we need to use energy more efficiently. To develop sustainable energy systems, users should transform their behavior and start reflecting on their energy use. This paper discusses different methods for visualizing household energy use. We will

Single and double pain responses to individually titrated ultra-short laser stimulation in humans

Background: This preclinical study in humans was designed to selectively induce delayed nociceptive pain responses to individually titrated laser stimulation, enabling separate bedside intensity scoring of both immediate and delayed pain. Methods: Forty-four (fourteen female) healthy volunteers were subjected to repeated nociceptive dermal stimulation in the plantar arc, based on ultra-short carb

Novel architectured, dislocation-free, III-Nitride structures for the next generation optoelectronic devices

III-Nitride (III-N) materials are promising building blocks of optoelectronic devices such as light emitting diode and laser diode due to the unique material properties. Furthermore, direct and tunable band gaps of III-N materials enable them to cover the entire visible-UV region of electromagnetic spectrum for device applications. Even though the possibility of the fabrication of many devices bas

Intergenerational Transfers in Infant Mortality in Southern Sweden, 1740-1968

Studies conducted in historical populations and developing countries have evidenced the existence of clustering in infant deaths, which could be related to genetic inheritance, early life exposures, and/or to social and cultural factors such as education, socioeconomic status or parental care. A transmission of death clustering has also been found across generations. This paper is one of five stud

Flight activity in pallid swifts Apus pallidus during the non-breeding period

Flight activity recorders have recently confirmed that alpine and common swifts spend the majority of their non-breeding period on the wing, which may last 6–10 months. Here we test the hypothesis that the closely related pallid swift, a species with a breeding distribution around the Mediterranean, lead a similar aerial life-style during its migration and wintering periods. The pallid swift usual

Searching for the neurite density with diffusion MRI : Challenges for biophysical modeling

In vivo mapping of the neurite density with diffusion MRI (dMRI) is a high but challenging aim. First, it is unknown whether all neurites exhibit completely anisotropic (“stick-like”) diffusion. Second, the “density” of tissue components may be confounded by non-diffusion properties such as T2 relaxation. Third, the domain of validity for the estimated parameters to serve as indices of neurite den

Markovian master equations for quantum thermal machines : Local versus global approach

The study of quantum thermal machines, and more generally of open quantum systems, often relies on master equations. Two approaches are mainly followed. On the one hand, there is the widely used, but often criticized, local approach, where machine sub-systems locally couple to thermal baths. On the other hand, in the more established global approach, thermal baths couple to global degrees of freed

On-demand entanglement generation using dynamic single-electron sources

We review our recent proposals for the on-demand generation of entangled few-electron states using dynamic single-electron sources. The generation of entanglement can be traced back to the single-electron entanglement produced by quantum point contacts (QPCs) acting as electronic beam splitters. The coherent partitioning of a single electron leads to entanglement between the two outgoing arms of t

The clinical value of ERCP-guided cholangiopancreatoscopy using a single-operator system

Background: Single-operator, per-oral cholangiopancreatoscopy (SOPCP) enables direct biliopancreatic ductal visualization, targeted tissue sampling, and therapeutic intervention. At Karolinska University Hospital, SOPCP was introduced early and has since been extensively utilized according to a standardized protocol. We analysed the clinical value of SOPCP in the diagnosis and treatment of biliopa