Search results for "ANSM"

Ultrasound measurements in bone using an array transducer

2014

Immobilized Pd on magnetic nanoparticles bearing proline as a highly efficient and retrievable Suzuki–Miyaura catalyst in aqueous media

2015

A magnetically retrievable nanocatalyst was evaluated for amicrowave assisted Suzuki–Miyaura reaction in aqueous media.Excellent yields and conversions were obtained with low Pd loadings(down to 0.01 mol% Pd). It was stable up to 6 months in waterunder aerobic conditions and efficiency remained unaltered evenafter 7 repeated cycles. Refereed/Peer-reviewed

Radiological Outcomes of Bone-Level and Tissue-Level Dental Implants: Systematic Review

2020

Purpose: to assess any differences on marginal bone loss between bone-level or tissue-level dental implants through a review of literature until September 2019. Materials and methods: MEDLINE, Embase and other database were searched by two independent authors. The search was limited to articles in English. Results: The search provided 1028 records and, after removing the duplicates through titles and abstracts screening, 45 full-text articles were assessed for eligibility. For qualitative analysis 20 articles were included, 17 articles of them for quantitative analysis. A total of 1161 patients (mean age 54,4 years) and 2933 implants were observed, 1427 (Tissue-level) and 1506 (Bone-level).…

MATERNAL EXPOSURE TO STRESSFUL/TRAUMATIC EVENTS AND AUTISM SPECTRUM DISORDERS IN OFFSPRING: PRELIMINARY FINDINGS OF A CASE CONTROL PILOT STUDY.

2023

The correlation between maternal exposure to stressful and traumatic events during pregnancy and autism spectrum disorder (ASD) in offspring has been studied in the literature. Fewer studies, however, have considered the mother's exposure to traumatic events during childhood. This work focuses on maternal exposure to these events in childhood and/or adulthood, relating it to autism spectrum disorder in offspring. A questionnaire was used to assess whether and to what type of event the mothers have been exposed, and to assess eventual peri-traumatic dissociation related to the traumatic event. The mothers involved in this study were recruited at the Child Neuropsychiatry Outpatient Clinic of…

Implicit regulation for automotive variators

2001

A well-known practice uses mechanical variators to realize the so-called continuously variable transmissions (CVTs) for automotive application. A remarkable problem for one of the most used CVTs is given by the hydraulic control of the axial thrust on the half-pulleys that is necessary for torque transmission. It involves a heavy decrease in transmission efficiency. In the present paper, the possible production of the required axial thrust by a simple spring to eliminate hydraulic losses is analysed. It is shown that the power capacity of such a regulated variator is near to the maximum possible, and the belt torque loss is always considerably lower than the sum of the belt and pump losses…

Data from: Dynamic transmission, host quality and population structure in a multi-host parasite of bumble bees

2012

The evolutionary ecology of multi-host parasites is predicted to depend upon patterns of host quality and the dynamics of transmission networks. Depending upon the differences in host quality and transmission asymmetries, as well as the balance between intra- and inter-specific transmission, the evolution of specialist or generalist strategies is predicted. Using a trypanosome parasite of bumble bees we ask how host quality and transmission networks relate to parasite population structure across host species, and thus the potential for the evolution of specialist strains adapted to different host species. Host species differed in quality, with parasite growth varying across host species. Hi…

Data from: Continental-scale patterns of pathogen prevalence: a case study on the corncrake

2014

Pathogen infections can represent a substantial threat to wild populations, especially those already limited in size. To determine how much variation in the pathogens observed among fragmented populations is caused by ecological factors, one needs to examine systems where host genetic diversity is consistent among the populations, thus controlling for any potentially confounding genetic effects. Here, we report geographic variation in haemosporidian infection among European populations of corncrake. This species now occurs in fragmented populations, but there is little genetic structure and equally high levels of genetic diversity among these populations. We observed a longitudinal gradient…

Data from: A mechanistic underpinning for sigmoid dose-dependent infection

2016

Theoretical models of environmentally transmitted diseases often assume that transmission is a constant process, which scales linearly with pathogen dose. Here we question the applicability of such an assumption and propose a sigmoidal form for the pathogens infectivity response. In our formulation, this response arises under two assumptions: 1) multiple invasion events are required for a successful pathogen infection and 2) the host invasion state is reversible. The first assumption reduces pathogen infection rates at low pathogen doses, while the second assumption, due to host immune function, leads to a saturating infection rate at high doses. The derived pathogen dose:infection rate -re…

Data from: Age-related effects of chronic hantavirus infection on female host fecundity

2016

1. Pathogens often cause detrimental effects to their hosts and, consequently, may influence host population dynamics that may, in turn, feed back to pathogen transmission dynamics. Understanding fitness effects of pathogens upon animal host populations can help to predict the risks that zoonotic pathogens pose to humans. 2. Here we determine whether chronic infection by Puumala hantavirus (PUUV) affects important fitness-related traits, namely the probability of breeding, reproductive effort and mother and offspring condition, in the bank vole (Myodes glareolus). Using 9 years empirical data in a PUUV endemic area in Central Finland, we found differences between reproductive characteristic…

Data from: Maternal antibodies contribute to sex based difference in hantavirus transmission dynamics

2014

Individuals often differ in their ability to transmit disease and identifying key individuals for transmission is a major issue in epidemiology. Male hosts are often thought to be more important than females for parasite transmission and persistence. However, the role of infectious females, particularly the transient immunity provided to offspring through maternal antibodies (MatAbs), has been neglected in discussions about sex-biased infection transmission. We examined the effect of host sex upon infection dynamics of zoonotic Puumala hantavirus (PUUV) in semi-natural, experimental populations of bank vole (Myodes glareolus). Populations were founded with either females or males that were …