Sökresultat

Filtyp

Din sökning på "*" gav 536491 sökträffar

Binary classification of F-18-flutemetamol PET using machine learning: Comparison with visual reads and structural MRI

F-18-flutemetamol is a positron emission tomography (PET) tracer for in vivo amyloid imaging. The ability to classify amyloid scans in a binary manner as 'normal' versus 'Alzheimer-like', is of high clinical relevance. We evaluated whether a supervised machine learning technique, support vector machines (SVM), can replicate the assignments made by visual readers blind to the clinical diagnosis, wh

A skewed thiopurine metabolism is a common clinical phenomenon that can be successfully managed with a combination of low-dose azathioprine and allopurinol

Background and aims: A skewed thiopurine metabolism is a phenomenon associated with both poor treatment response and toxicity. Our aim was to evaluate the frequency of this phenomenon and the relationship to thiopurine methyltransferase (TPMT) function. Methods: All thiopurine metabolite measurements in adult patients (n=4033) between January 2006 and April 2012 were assessed to evaluate the occur

Spatially explicit analyses of gastropod biodiversity in ancient Lake Ohrid

Abstract. Spatial heterogeneity of biodiversity arises from evolutionary processes, constraints of environmental factors and the interaction of communities. The quality of such spatial analyses of biodiversity is improved by (i) utilizing study areas with well defined physiogeographical boundaries, (ii) limiting the impact of widespread species, and (iii) using taxa with heterogeneous distribution

Incommensurately Modulated δ″-Au1+xCd2-x Formed by an Unquenchable Phase Transformation from the γ-Brass δ'-Phase.

The synthesis and structural determination of the compound δ″-Au1+xCd2-x (0.07 ≤ x ≤0.08) is reported. The structure may be formally derived from that of ξ-CoZn13, but elemental ordering causes an incommensurate modulation as determined by single-crystal X-ray diffraction at room temperature. The compound δ″-Au3.23Cd5.76 crystallizes in the monoclinic super space group C2/m(0β(1)/2)00 with lattice

Tunnelled lateral fasciocutaneous thoracodorsal flap with a skin island in breast reconstruction in oncoplastic breast surgery

The technique and results of a tunnelled lateral fasciocutaneous flap with a skin island is described in immediate partial breast reconstruction in a subpopulation in oncoplastic breast surgery. Fifteen patients were operated on from January 2008 to January 2011. The subpopulation consisted of patients with small or medium-sized breasts. All patients had invasive ductal carcinomas, located in the

Intonation Adapts to Lexical Tone: The Case of Kammu

In this paper, we investigate how lexical tones interact with intonation, using data from the Austroasiatic language Kammu, one of few languages with two dialects whose only major phonological difference is the presence or absence of lexical tones. Northern (and Western) Kammu have developed tones in connection with the merger of voiceless and voiced initial consonants, while the non-tonal Eastern

Outcomes of Various Interventions for First-Time Perianal Abscesses in Children

Introduction. In children treated surgically for first-time perianal abscesses, discovery and excision of concomitant fistulas may also be warranted. Aim. To evaluate children of varying age after incision and drainage of first-time perianal abscesses, examining recurrences rates with and without search for a fistula. Method. A retrospective review was conducted, analyzing children (ages 0-15 year

Interactions between polymorphisms in the aryl hydrocarbon receptor signalling pathway and exposure to persistent organochlorine pollutants affect human semen quality.

Persistent organic pollutants (POPs) may affect male reproductive function. Many dioxin-like POPs exert their effects by activation of the aryl hydrocarbon receptor (AHR) signalling pathway. We analysed whether gene-environment interactions between polymorphisms in AHR (R554K) and AHR repressor (AHRR P185A) and serum levels of markers of POP exposure 1,1-bis-(4-chlorophenyl)-2,2-dichloroethene (p,

ADAM10 and BACE1 are localized to synaptic vesicles.

Synaptic degeneration and accumulation of the neurotoxic amyloid β-peptide (Aβ) in the brain are hallmarks of Alzheimer disease. Aβ is produced by sequential cleavage of its precursor protein, APP, by the β-secretase BACE1 and γ-secretase. However, Aβ generation is precluded if APP is cleaved by the α-secretase ADAM10 instead of BACE1. We have previously shown that Aβ can be produced locally at th

Insights into evolution of multicellular fungi from the assembled chromosomes of the mushroom Coprinopsis cinerea (Coprinus cinereus)

The mushroom Coprinopsis cinerea is a classic experimental model for multicellular development in fungi because it grows on defined media, completes its life cycle in 2 weeks, produces some 10(8) synchronized meiocytes, and can be manipulated at all stages in development by mutation and transformation. The 37-megabase genome of C. cinerea was sequenced and assembled into 13 chromosomes. Meiotic re

Fetal cerebral energy metabolism and electrocardiogram during experimental umbilical cord occlusion and resuscitation.

Objective. The purpose of this experimental study was to elucidate alterations in fetal energy metabolism in relation to ECG changes during extreme fetal asphyxia, postnatal resuscitation and the immediate post-resuscitatory phase. Study design. Five near-term fetal sheep were subjected to umbilical cord occlusion until cardiac arrest followed by delivery, resuscitation and postnatal pressure-cont

The dominant role of semi-arid ecosystems in the trend and variability of the land CO2 sink

The growth rate of atmospheric carbon dioxide (CO2) concentrations since industrialization is characterized by large interannual variability, mostly resulting from variability in CO2 uptake by terrestrial ecosystems (typically termed carbon sink). However, the contributions of regional ecosystems to that variability are not well known. Using an ensemble of ecosystem and land-surface models and an

Breast Cancer in Systemic Lupus Erythematosus

Objective: Evidence points to a decreased breast cancer risk in systemic lupus erythematosus (SLE). We analyzed data from a large multisite SLE cohort, linked to cancer registries. Methods: Information on age, SLE duration, cancer date, and histology was available. We analyzed information on histological type and performed multivariate logistic regression analyses of histological types according t

Methanol production from steel-work off-gases and biomass based synthesis gas

Off-gases generated during steelmaking are to a large extent used as fuels in process units within the plant. The surplus gases are commonly supplied to a plant for combined heat and power production. The main objective of this study has been to techno-economically investigate the feasibility of an innovative way of producing methanol from these off-gases, thereby upgrading the economic value of t