Sökresultat

Filtyp

Din sökning på "*" gav 535045 sökträffar

Electrocatalytic proton reduction by thiolate-capped triiron clusters [Fe3(CO)93-SR)(μ-H)] (R = iPr, tBu)

The redox behaviour and electrocatalytic proton reduction ability of the thiolate-capped triiron clusters [Fe3(CO)9(μ3-SR)(μ-H)] (1, R = iPr; 2, R = tBu) have been investigated. In CH2Cl2, both show a quasi-reversible reduction and an irreversible oxidation. The thiol substituent has a significant influence on their reduction potentials (E1/2 = −1.24 V for 1 and E1/2 = −1.40 V for 2 vs. Fc+/Fc) bu

Bereavement stressors and psychosocial well-being of young adults following the loss of a parent – A cross-sectional survey

Purpose: The knowledge about young adults who have lost a parent to cancer is limited, and to reach a broader understanding about this group, this study used the Dual Process Model of Coping with Bereavement (Stroebe and Schut, 1999) as a theoretical framework. The purpose of this study was to describe loss- and restoration-oriented bereavement stressors and psychosocial wellbeing of young adults

Literature review on renovation of multifamily buildings in temperate climate conditions

In Sweden, approximately 1.4 million dwellings were built 1946–1975. Today, a considerable part of these are in need of renovation for various reasons. Research results, as well as experiences and outcomes from renovation projects could facilitate in performing more efficient renovations. As an aid for further research, this paper aims to compile and review relevant literature that may support in

Differential correlations between maternal hair levels of tobacco and alcohol with fetal growth restriction clinical subtypes

Maternal exposure to tobacco and alcohol is a known cause, among others, for fetal growth restriction (FGR). Clinically, FGR can be subclassified into two forms: intrauterine growth restriction (IUGR) and small for gestational age (SGA), based on the severity of the growth retardation, and abnormal uterine artery Doppler or cerebro-placental ratio. This study aimed at investigating any differentia

Computational investigation of the dust hole effect on the heat transfer and friction factor characteristics in a U bend channel

In this study, effects of a dust hole and its location on the flow structure, endwall heat transfer and friction factor in a U bend channel used for a gas turbine blade tip cooling are numerically studied. The dust hole is placed on the endwall of a U bend at different locations. The U bend channel without dust hole is considered as Baseline. The Reynolds number ranges from 50,000 to 440,000. Resu

Impact of sample crushing on porosity characterization of hardened cement pastes by low temperature calorimetry : Comparison of powder and cylinder samples

The impact of sample crushing on the detected porosity of hardened cement pastes by low temperature calorimetry (LTC) was studied using powder and cylinder samples. Two types of cements, CEM I and CEM III were used to prepare the pastes. A model porous material, MCM-41, was also used in order to investigate some aspects of the measurement and the evaluation approach. The powder and cylinder sample

Understanding one's body and movements from the perspective of young adults with autism : A mixed-methods study

Background: There are but a few studies of how persons with autism perceive their bodies and movements. Difficulties in perceiving the surrounding world along with disturbed motor coordination and executive functions may affect physical and psychological development. Aims: To explore the experiences of body and movements in young adults with autism and how two physiotherapeutic instruments may cap

The Swedish grommet register – Hearing results and adherence to guidelines

Objectives: The insertion of grommets is one of the most commonly performed surgical procedures in children. The underlying reason might be otitis media with effusion (OME) with concomitant hearing loss, recurrent acute otitis media (rAOM) or a combination of the two. Sweden has a national quality register for children receiving grommets with the purpose of evaluating how treatment guidelines are

Osborn waves following out-of-hospital cardiac arrest—Effect of level of temperature management and risk of arrhythmia and death

Background: The Osborn or J-wave, an upright deflection of the J-point on the electrocardiogram (ECG), is often observed during severe hypothermia. A possible relation between Osborn waves (OW) and increased risk of ventricular arrhythmia has been reported. We sought to determine whether the level of targeted temperature management (TTM) following out-of-hospital cardiac arrest (OHCA) affects the

Adolescents’ motives for selling sex in a welfare state – A Swedish national study

In addition to money or other compensation, other motives for selling sex may be important in a welfare country such as Sweden. The aim of this study was to carry out an exploratory investigation of adolescents’ motives for selling sex in a population-based survey in Sweden. A total of 5839 adolescents from the third year of Swedish high school, mean age 18.0 years, participated in the study. The

Apolipoprotein M promotes proliferation and invasion in non-small cell lung cancers via upregulating S1PR1 and activating the ERK1/2 and PI3K/AKT signaling pathways

Apolipoprotein M (ApoM) is a sphingosine 1-phosphate (S1P) carrier involved in the regulation of S1P. Signaling pathways involving sphingosine kinases (SphKs) and S1P-S1P receptors (S1PRs) play important roles in the oncogenesis of multiple cancers including non-small cell lung cancer (NSCLC). In the present study we have clarified the potential roles of ApoM on the oncogenesis process of NSCLC ce

Diversity of olfactory structures: A comparative study of antennal sensilla in Trichoptera and Lepidoptera

The antenna is the main sensory organ of insects, housing different types of sensilla dedicated to detect chemicalcues, motion, humidity and temperature. Sensilla are divided into different types based on their wall structureand morphology. Among the olfactory sensilla, there is an enormous variation in the numbers and morphologicaltypes present in different insect taxa. The reasons for this varia

Conservation law with multiply discontinuous flux modelling a flotation column

Flotation is a unit operation extensively used in the recovery of valuable minerals in mineral processing and related applications. Essential insight to the hydrodynamics of a otation column can be obtained by studying just two phases: gas and uid. To this end, the approach based on the drift-flx theory, proposed in similar form by several authors, is reformulated as a one-dimensional non-linear c

A Self-aligned Gate-last Process applied to All-III-V CMOS on Si

Vertical nanowire n-type (InAs) and p-type (GaSb) transistors are co-processed and co-integrated using a gate-last process, enabling short gate-lengths (Lg=40 nm) and allowing selective digital etching of the channel. Two different common gate-stacks, including various pre-treatments, were compared and evaluated. The process was optimized to achieve high n-type performance while demonstrating

Dietary and genetic risk scores and incidence of type 2 diabetes

Background: Both lifestyle and genetic predisposition determine the development of type 2 diabetes (T2D), and studies have indicated interactions between specific dietary components and individual genetic variants. However, it is unclear whether the importance of overall dietary habits, including T2D-related food intakes, differs depending on genetic predisposition to T2D. We examined interaction

Trends and factors associated with early initiation of breastfeeding in Namibia : Analysis of the Demographic and Health Surveys 2000-2013

Background: Early initiation of breastfeeding (EIBF) lowers the risk for all-cause mortality in babies, including those with low birth weight. However, rates of neonatal mortality and delayed initiation of breastfeeding remain high in most low- and middle-income countries. This study aimed to assess the trends and factors associated with EIBF in Namibia from 2000 to 2013. Methods: An analysis of E

Developmental plasticity in reptiles: Insights from temperature-dependent gene expression in wall lizard embryos : Insights from temperature-dependent gene expression in wall lizard embryos

Many features of the development of reptiles are affected by temperature, but very little is known about how incubation temperature affects gene expression. Here, we provide a detailed case study of gene expression profiles in common wall lizard (Podarcis muralis) embryos developing at stressfully low (15°C) versus benign (24°C) temperature. For maximum comparability between the two temperature re

Airway physical examination tests for detection of difficult airway management in apparently normal adult patients

Background: The unanticipated difficult airway is a potentially life-threatening event during anaesthesia or acute conditions. An unsuccessfully managed upper airway is associated with serious morbidity and mortality. Several bedside screening tests are used in clinical practice to identify those at high risk of difficult airway. Their accuracy and benefit however, remains unclear. Objectives: The

Asymptotically Optimal Regression Trees

Regression trees are evaluated with respect to mean square error (MSE), mean integrated square error (MISE), and integrated squared error (ISE), as the size of the training sample goes to infinity. The asymptotically MSE- and MISE minimizing (locally adaptive) regression trees are characterized. Under an optimal tree, MSE is O(n^{-2/3}). The estimator is shown to be asymptotically normally distrib

Human igg increases virulence of streptococcus pyogenes through complement evasion

Streptococcus pyogenes is an exclusively human pathogen that can provoke mild skin and throat infections but can also cause fatal septicemia. This gram-positive bacterium has developed several strategies to evade the human immune system, enabling S. pyogenes to survive in the host. These strategies include recruiting several human plasma proteins, such as the complement inhibitor, C4b-binding prot