49 research outputs found

    The new COST Action European Venom Network (EUVEN)—synergy and future perspectives of modern venomics

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    Venom research is a highly multidisciplinary field that involves multiple subfields of biology, informatics, pharmacology, medicine, and other areas. These different research facets are often technologically challenging and pursued by different teams lacking connection with each other. This lack of coordination hampers the full development of venom investigation and applications. The COST Action CA19144–European Venom Network was recently launched to promote synergistic interactions among different stakeholders and foster venom research at the European level

    A Quaternary ZnCdSeTe Nanotip Photodetector

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    The authors report the growth of needle-like high density quaternary Zn0.87Cd0.13Se0.98Te0.02nanotips on oxidized Si(100) substrate. It was found that average length and average diameter of the nanotips were 1.3 μm and 91 nm, respectively. It was also found that the as-grown ZnCdSeTe nanotips exhibit mixture of cubic zinc-blende and hexagonal wurtzite structures. Furthermore, it was found that the operation speeds of the fabricated ZnCdSeTe nanotip photodetector were fast with turn-on and turn-off time constants both less than 2 s

    Approaches to mixture risk assessment of PFASs in the European population based on human hazard and biomonitoring data

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    Per- and polyfluoroalkyl substances (PFASs) are a highly persistent, mobile, and bioaccumulative class of chemicals, of which emissions into the environment result in long-lasting contamination with high probability for causing adverse effects to human health and the environment. Within the European Biomonitoring Initiative HBM4EU, samples and data were collected in a harmonized way from human biomonitoring (HBM) studies in Europe to derive current exposure data across a geographic spread. We performed mixture risk assessments based on recent internal exposure data of PFASs in European teenagers generated in the HBM4EU Aligned Studies (dataset with N = 1957, sampling years 2014-2021). Mixture risk assessments were performed based on three hazard-based approaches: the Hazard Index (HI) approach, the sum value approach as used by the European Food Safety Authority (EFSA) and the Relative Potency Factor (RPF) approach. The HI approach resulted in the highest risk estimates, followed by the RPF approach and the sum value approach. The assessments indicate that PFAS exposure may result in a health risk in a considerable fraction of individuals in the HBM4EU teenager study sample, thereby confirming the conclusion drawn in the recent EFSA scientific opinion. This study underlines that HBM data are of added value in assessing the health risks of aggregate and cumulative exposure to PFASs, as such data are able to reflect exposure from different sources and via different routes.This work was supported by the European Union’s Horizon 2020 research and innovation programme under Grant agreement No 733032 HBM4EU (www.HBM4EU.eu), and received co-funding from the au thors’ organizations. The Norwegian Institute of Public Health (NIPH) has contributed to funding of the Norwegian Environmental Biobank (NEB), and the laboratory measurements have partly been funded by the Research Council of Norway through research projects (275903 and 268465). The PCB cohort (follow-up) received additional funding from the Ministry of Health of the Slovak Republic (program 07B0103).S

    The CPLEAR detector at CERN

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    The CPLEAR collaboration has constructed a detector at CERN for an extensive programme of CP-, T- and CPT-symmetry studies using K0{\rm K}^0 and Kˉ0\bar{\rm K}^0 produced by the annihilation of pˉ\bar{\rm p}'s in a hydrogen gas target. The K0{\rm K}^0 and Kˉ0\bar{\rm K}^0 are identified by their companion products of the annihilation K±π{\rm K}^{\pm} \pi^{\mp} which are tracked with multiwire proportional chambers, drift chambers and streamer tubes. Particle identification is carried out with a liquid Cherenkov detector for fast separation of pions and kaons and with scintillators which allow the measurement of time of flight and energy loss. Photons are measured with a lead/gas sampling electromagnetic calorimeter. The required antiproton annihilation modes are selected by fast online processors using the tracking chamber and particle identification information. All the detectors are mounted in a 0.44 T uniform field of an axial solenoid of diameter 2 m and length 3.6 m to form a magnetic spectrometer capable of full on-line reconstruction and selection of events. The design, operating parameters and performance of the sub-detectors are described.

    Using the Australian Therapy Outcome Measures for Occupational Therapy (AusTOMs-OT) to measure client participation outcomes

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    Introduction: Measuring change in clients’ ‘participation’, and being able to attribute this change to occupational therapy intervention, is important in the quest to provide evidence to support practice. The Australian Therapy Outcome Measures for Occupational Therapy is an outcome measure that has four domains, one of which is concerned with measuring client participation. An occupational therapy service wanted to determine if client level of participation was improving, as measured by the Australian Therapy Outcome Measures for Occupational Therapy. Method: Data were collected between 2009 and 2012 from three home-based therapy services, using the Australian Therapy Outcome Measures for Occupational Therapy. Data were divided into diagnostic cohorts, and then exploratory data analysis techniques and paired t-tests were performed. Findings: Data from 506 participants were analysed and clients in all diagnostic groups made statistically (p < .05) significant improvements over time in relation to their participation. Conclusion: Most clients in this study improved or maintained their level of participation between admission and discharge, with few clients deteriorating, when measured on the Australian Therapy Outcome Measures for Occupational Therapy scales. These results suggest the home-based therapy service was meeting its goal, and further supports the responsiveness of the Australian Therapy Outcome Measures for Occupational Therapy to detect change in clients’ participation status over time. Randomized control trials are needed to determine whether improvements in participation are due to engaging in the occupational therapy program

    Synthesis and evaluation of condensed magnetic nanocrystal clusters with<em> in&nbsp;vivo </em>multispectral optoacoustic tomography for tumour targeting.

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    Colloidal clusters of magnetic iron oxide nanocrystals (MIONs), particularly in the condensed pattern (co-CNCs), have emerged as new superstructures to improve further the performance of MIONs in applications pertaining to magnetic manipulation (drug delivery) and magnetic resonance imaging (MRI). Exploitation of the advantages they represent and their establishment in the area of nanomedicine demands a particular set of assets. The present work describes the development and evaluation of MION-based co-CNCs featuring for the first time such assets: High magnetization, as well as magnetic content and moment, high relaxivities (r2&nbsp;=&nbsp;400 and [Formula: see text] ) and intrinsic loss power (2.3&nbsp;nH&nbsp;m(2) kgFe(-1)) are combined with unprecedented colloidal stability and structural integrity, stealth and drug-loading properties. The reported nanoconstructs are endowed with additional important features such as cost-effective synthesis and storage, prolonged self-life and biocompatibility. It is finally showcased with in&nbsp;vivo multispectral optoacoustic tomography how these properties culminate in a system suitable for targeting breast cancer and for forceful in&nbsp;vivo manipulation with low magnetic field gradients
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