Publications by authors named "J W SHIELD"
Superparamagnetic iron-oxide nanoparticles (SPIONs) are promising probes for biomedical imaging, but the heterogeneity of their magnetic properties is difficult to characterize with existing methods. Here, we perform wide-field imaging of the stray magnetic fields produced by hundreds of isolated ∼30 nm SPIONs using a magnetic microscope based on nitrogen-vacancy centers in diamond. By analyzing the SPION magnetic field patterns as a function of the applied magnetic field, we observe substantial field-dependent transverse magnetization components that are typically obscured with ensemble characterization methods.
View Article and Find Full Text PDFObjective: To explore whether parents' attendance at a commercial adult weight management programme (WMP) offers an opportunity to identify and signpost families to child weight management support, if appropriate to a child's weight status.
Design: Mixed methods study including a cross-sectional online survey and semistructured telephone interviews.
Setting And Participants: Parents attending Slimming World (UK-based adult commercial WMP), with one or more children aged 5-11 years, were invited to take part.
Article Synopsis
- This study compares two forms of the iron(II) triazole spin crossover complex—nanoparticles and nanorods—in terms of their structure and electrical conductivity.
- Conductive atomic force microscopy revealed that the nanorods exhibited significantly higher conductivity than the nanoparticles, which is linked to their different Fe-N bond lengths.
- Transport measurements indicated that the nanorods have the highest conductance in a low spin state at 320 K when in the dark, while illuminated conditions showed a reduced change in conductance.
Article Synopsis
- * Researchers used a specialized magnetic microscope to image the magnetic fields from many isolated SPIONs, discovering distinct magnetization patterns that traditional methods wouldn't reveal.
- * The study also recorded SPION relaxation times after an applied magnetic field was turned off, showing a wide range of characteristics among the nanoparticles, indicating their varied behavior and potential for further nanomagnetism research.
Background: Children and young people living with severe obesity experience a range of complications of excess weight (CEW); however the prevalence of complications is not well defined. We have evaluated baseline characteristics and CEW of patients from two UK tier 3 paediatric weight management services.
Methods: All new patients aged 2-17 years seen from March 2022 to February 2023 were included.