Search results

Filter

Filetype

Your search for "*" yielded 531810 hits

Chemical ecology of obligate pollination mutualisms: testing the 'private channel' hypothesis in the Breynia-Epicephala association.

New Phytologist (2010) Summary *Obligate mutualisms involving actively pollinating seed predators are among the most remarkable insect-plant relationships known, yet almost nothing is known about the chemistry of pollinator attraction in these systems. The extreme species specificity observed in these mutualisms may be maintained by specific chemical compounds through 'private channels'. Here, we

Modelling the Impact of Emergency Exit Signs in Tunnels

This paper addresses the problem of representing the impact of different emergency exit signs during the evacuation of a tunnel when using two different evacuation models (i.e. FDS+Evac and buildingEXODUS). Both models allow the user to represent the impact of smoke upon the evacuee. The models are calibrated (1) considering the nature of the models themselves, (2) by deriving assumptions from pre

Dog bite injuries to the hand.

Abstract Dog bites to the hand and forearm are common. Although bites are usually minor, aggressive dogs may cause extensive bites developing to a public health problem. In a database review of dog bites to the hand applied to Emergency Department or to the Department of Hand Surgery in Malmö, Sweden 2008-2009, we found 81 cases [42 men and 39 women; median age 45 (range 2-88) years]. Three of 81

Adsorption of deoxyribonucleic acid (DNA) by willow wood biochars produced at different pyrolysis temperatures

Adsorption of DNA by biochars was investigated in the present study. Biochars were produced from air-dried willow wood chips at 300, 400, 500, and 600 A degrees C under limited oxygen supply. The resulting products, referred to as BC300, BC400, BC500, and BC600, respectively, were characterized for their elemental composition, cation exchange capacity (CEC), specific surface areas (SSA), and micro

Mechanical compression during repeated sustained isometric muscle contractions and hyperemic recovery in healthy young males.

An elevated intramuscular pressure during a single forearm isometric muscle contraction may restrict muscle hyperemia. However, during repeated isometric exercise, it is unclear to what extent mechanical compression and muscle vasodilatation contribute to the magnitude and time course of beat-to-beat limb hemodynamics, due to alterations in leg vascular conductance (LVC).

The effect of systematic set-up deviations on the absorbed dose distribution for left-sided breast cancer treated with respiratory gating

The aim of this study was 1) to investigate interfraction set-up uncertainties for patients treated with respiratory gating for left-sided breast cancer, 2) to investigate the effect of the inter-fraction set-up on the absorbed dose-distribution for the target and organs at risk (OARs) and 3) optimize the set-up correction strategy. By acquiring multiple set-up images the systematic set-up deviati

Double-spin asymmetry of electrons from heavy-flavor decays in p plus p collisions at root s=200 GeV

We report on the first measurement of the double-spin asymmetry, A(LL), of electrons from the decays of hadrons containing heavy flavor in longitudinally polarized p + p collisions at root s = 200 GeV for p(T) = 0.5 to 3.0 GeV/c. The asymmetry was measured at midrapidity (vertical bar eta vertical bar < 0.35) with the PHENIX detector at the Relativistic Heavy Ion Collider. The measured asymmetries

Using NMR Chemical Shift Imaging To Monitor Swelling and Molecular Transport in Drug-Loaded Tablets of Hydrophobically Modified Poly(acrylic acid): Methodology and Effects of Polymer (In)solubility

A new technique has been developed using NMR chemical shift imaging (CSI) to monitor water penetration and molecular transport in initially dry polymer tablets that also contain small low-molecular weight compounds to be released from the tablets. Concentration profiles of components contained in the swelling tablets could be extracted via the intensities and chemical shift changes of peaks corres

Mapping daily evapotranspiration and dryness index in the East African highlands using MODIS and SEVIRI data

Routine information on regional evapotranspiration (ET) and dryness index is essential for agricultural water management, drought monitoring, and studies of water cycle and climate. However, this information is not currently available for the East Africa highlands. The main purpose of this study is to develop (1) a new methodology that produces spatially gridded daily ET estimates on a (near) real

Rethinking the Univariate Approach to Panel Unit Root Testing: Using Covariates to Resolve the Incidental Trend Problem: Using Covariates to Resolve the Incidental Trend Problem

In an influential paper, Hansen (Rethinking the Univariate Approach to Unit Root Testing: Using Covariates to Increase Power, Econometric Theory 11, 1148–1171, 1995) shows that covariate augmentation can lead to substantial power gains when compared to univariate tests. In this paper we ask if this result extends also to the panel data context? The answer turns out to be yes, which is maybe not th

Introducing urban food forestry: a multifunctional approach to increase food security and provide ecosystem services

We examine the potential role of perennial woody food-producing species ("food trees") in cities in the context of urban sustainable development and propose a multifunctional approach that combines elements of urban agriculture, urban forestry, and agroforestry into what we call "urban food forestry" (UFF). We used four approaches at different scales to gauge the potential of UFF to enhance urban

A Universal Prior Distribution for Bayesian Consistency of Non parametric Procedures

The introduction of the Hausdorff alpha-entropy in Xing (2008a), Xing (2008b), Xing (2010), Xing (2011), and Xing and Ranneby (2009) has lead a series of improvements of well-known results on posterior consistency. In this paper we discuss an application of the Hausdorff a-entropy. We construct a universal prior distribution such that the corresponding posterior distribution is almost surely consi

Paediatric ventilation treatment of acute lung injury in Nordic intensive care units

BackgroundTreatment of acute respiratory distress syndrome (ARDS) in children is largely based on extrapolated knowledge obtained from adults and which varies between different hospitals. This study explores ventilation treatment strategies for children with ARDS in the Nordic countries, and compares these with international practice. MethodsIn October 2012, a questionnaire covering ventilation tr

Development of mass transport resistance in poly(lactide-co-glycolide) films and particles - A mechanistic study.

Poly(d,l-lactide-co-glycolide) (PLG) is the most frequently used biodegradable polymer in the controlled release of an encapsulated drug. The purpose of this work was to explain the surprisingly slow diffusion through this polymer, and locate the major source of mass transport resistance. Diffusion of human growth hormone (hGH) and glucose through PLG films was undetectable (using a diffusion cell

Exploration of the active site of β4GalT7: modifications of the aglycon of aromatic xylosides.

Proteoglycans (PGs) are macromolecules that consist of long linear polysaccharides, glycosaminoglycan (GAG) chains, covalently attached to a core protein by the carbohydrate xylose. The biosynthesis of GAG chains is initiated by xylosylation of the core protein followed by galactosylation by the galactosyltransferase β4GalT7. Some β-d-xylosides, such as 2-naphthyl β-d-xylopyranoside, can induce GA

Menstrual and Reproductive Factors, Exogenous Hormone Use, and Gastric Cancer Risk in a Cohort of Women From the European Prospective Investigation Into Cancer and Nutrition

The worldwide incidence of gastric adenocarcinoma (GC) is lower in women than in men. Furthermore, cancer patients treated with estrogens have been reported to have a lower subsequent risk of GC. The authors conducted a prospective analysis of menstrual and reproductive factors, exogenous hormone use, and GC in 335,216 women from the European Prospective Investigation Into Cancer and Nutrition, a

Prostate-Cancer Mortality at 11 Years of Follow-up

Background Several trials evaluating the effect of prostate-specific antigen (PSA) testing on prostate-cancer mortality have shown conflicting results. We updated prostate-cancer mortality in the European Randomized Study of Screening for Prostate Cancer with 2 additional years of follow-up. Methods The study involved 182,160 men between the ages of 50 and 74 years at entry, with a predefined core