Sökresultat

Filtyp

Din sökning på "*" gav 528580 sökträffar

Temperature as a driver for the expansion of the microalga Gonyostomum semen in Swedish lakes

Gonyostomum semen (Ehrenb) Diesing is a bloom-forming and noxious phytoplankton species, that usually occurs in brown-water lakes and which is often referred to as an invasive species. The aim of our study was to analyze changes over time in the occurrence and distribution of blooms, and to find possible drivers of this change. We also performed spatial analyses to identify environmental factors c

Transcriptional regulation of lineage commitment - a stochastic model of cell fate decisions.

Molecular mechanisms employed by individual multipotent cells at the point of lineage commitment remain largely uncharacterized. Current paradigms span from instructive to noise-driven mechanisms. Of considerable interest is also whether commitment involves a limited set of genes or the entire transcriptional program, and to what extent gene expression configures multiple trajectories into commitm

Country of origin or EU/non-EU labelling of beef? Comparing structural reliability and validity of discrete choice experiments for measurement of consumer preferences for origin and extrinsic quality cues

The use of food labels and packaging information on place of origin and credence quality has increased, but it is still unclear how such information relates to consumer decisions and choices concerning the relative valuation of attributes. Valid measurement methods are needed to assess the importance attributed by the public to such information, but also to inform the industry about market demand.

Barrier-free outdoor environments: Older peoples' perceptions before and after implementation of legislative directives

An increased focus on international and national levels of society to meet the transportation needs of older people and people with disabilities is realized through legislation, directives and guidelines on accessibility. This paper examines effects of removing physical barriers according to current Swedish governmental accessibility directives on older peoples' perceptions of outdoor environments

Basic mechanisms of migraine and its acute treatment.

Migraine is a neurovascular disorder characterized by recurrent unilateral headaches accompanied by nausea, vomiting, photophobia and phonophobia. Current theories suggest that the initiation of a migraine attack involves a primary event in the central nervous system (CNS), probably involving a combination of genetic changes in ion channels and environmental changes, which renders the individual m

Willingness to pay for health improvements associated with anti-diabetes treatments for people with type 2 diabetes

Objectives: This study aimed to investigate the most important consequences of diabetes medication, as measured by the patients' willingness to pay (WTP). Research design and methods: People in Sweden were recruited using existing nationwide e-mail panels if they were adults (>= 18 years) with type 2 diabetes and were receiving pharmacological anti-diabetes treatment(s). Data were collected electr

Cigarette smoking and risk of histological subtypes of epithelial ovarian cancer in the EPIC cohort study

New data regarding a positive association between smoking and risk of epithelial ovarian cancer (EOC), especially the mucinous tumor type, has started to emerge. The purpose of this study was to examine the association between different measures of smoking exposures and subtypes of EOC in a large cohort of women from 10 European countries. The European Prospective Investigation into Cancer and Nut

Alcohol consumption and the risk of renal cancers in the European prospective investigation into cancer and nutrition (EPIC)

Epidemiologic studies have reported that moderate alcohol consumption is inversely associated with the risk of renal cancer. However, there is no information available on the associations in renal cancer subsites. From 1992 through to 2010, 477,325 men and women in the European Prospective Investigation into Cancer and Nutrition cohort were followed for incident renal cancers (n=931). Baseline and

Is p-tert-butylphenol-formaldehyde resin (PTBP-FR) in TRUE Test (R) (Mekos test) sensitizing the tested patients?

Background. In a population study using TRUE Test (R), we noted late reactions to p-tert-butylphenol-formaldehyde resin (PTBP-FR) in 0.5% of subjects tested. Objectives. In order to explore possible test sensitization, differences in the contents of sensitizers within PTBP-FR in test preparations for TRUE Test (R) and Finn Chambers (R) were analysed. Subjects allergic to PTBP-FR and subjects with

On a TiNiSi-Type Superstructure: Synthesis, Crystal and Electronic Structures of CaAgGe and Its Mn-Substituted Derivative

The compound CaAgGe and its Mn-substituted derivative CaMn0.07Ag0.93Ge were synthesized by reaction of the element mixtures at high temperature. Their structures were refined from single-crystal X-ray diffraction data. CaAgGe crystallizes in the isomorphic (i(3)) superstructure of the TiNiSi type (CaCuGe type). The LMTO band structure calculations predicted the CaAgGe phase to be metallic. In addi

Effect of Medication on Microvascular Vasodilatation in Patients with Systemic Lupus Erythematosus

The aim of this study was to investigate the microvascular responses in the skin, to local heat, iontophoretically administered acetylcholine and to sodium nitroprusside in relation to cardiovascular damage in patients with systemic lupus erythematosus (SLE) and matched controls. We also wanted to examine if the ongoing medication in SLE patients influenced this vascular response. We investigated

BDNF increases survival and neuronal differentiation of human neural precursor cells cotransplanted with a nanofiber gel to the auditory nerve in a rat model of neuronal damage.

Objectives. To study possible nerve regeneration of a damaged auditory nerve by the use of stem cell transplantation. Methods. We transplanted HNPCs to the rat AN trunk by the internal auditory meatus (IAM). Furthermore, we studied if addition of BDNF affects survival and phenotypic differentiation of the grafted HNPCs. A bioactive nanofiber gel (PA gel), in selected groups mixed with BDNF, was ap

Quantifying the Semantic Representations of Adolescents' Memories of Positive and Negative Life Events

We quantified the semantic content in adolescents’ descriptions of positive and negative life events and studied how these descriptions are related to the assessment Subjective Well-Being (SWB) at two points in time. The semantic content of the descriptions was quantified by Latent Semantic Analysis (LSA). LSA is a computational method based on algorithms stemming from computational linguistics, w

Microscopic Origin of the Logarithmic Time Evolution of Aging Processes in Complex Systems

There exists compelling experimental evidence in numerous systems for logarithmically slow time evolution, yet its full theoretical understanding remains elusive. We here introduce and study a generic transition process in complex systems, based on nonrenewal, aging waiting times. Each state n of the system follows a local clock initiated at t = 0. The random time tau between clock ticks follows t

An Aspergillus nidulans β-mannanase with high transglycosylation capacity revealed through comparative studies within glycosidase family 5.

β-Mannanases are involved in the conversion and modification of mannan-based saccharides. Using a retaining mechanism, they can, in addition to hydrolysis, also potentially perform transglycosylation reactions, synthesizing new glyco-conjugates. Transglycosylation has been reported for β-mannanases in GH5 and GH113. However, although they share the same fold and catalytic mechanism, there may be d

Postglacial sedimentary and geomorphological evolution of a small sub-Antarctic fjord landscape, Stromness Bay, South Georgia

A detailed stratigraphical, palaeoecological and geomorphological reconstruction of a fjord head on South Georgia (Husvik, Stromness Bay) is presented. Six sites were chosen to reconstruct the lithostratigraphy of the area by means of coring. A maximum depth of 11m was attained and the sediments encountered vary from coarse gravel over sands to fine silts with, in some cases, intercalated peat lay

The association between self-rated health and impaired glucose tolerance in Swedish adults: A cross-sectional study

Objective. To investigate gender differences in the association between self-rated health (SRH) and impaired glucose tolerance (IGT) in subjects unaware of their glucose tolerance. Design. A cross-sectional population-based study. Setting. The two municipalities of Vara and Skovde in south-western Sweden. Subjects. A total of 2502 participants (1301 women and 1201 men), aged 30-75, were randomly s