Publications by authors named "A K Yuen"

Background And Hypothesis: Schizophrenia spectrum disorder (SSD) is a chronic neuropsychiatric illness accompanied by significant brain structural and functional abnormalities and higher rate of cardio- and cerebrovascular comorbidities. We hypothesized that genetic and environmental risk factors that led to SSD act throughout the body and demonstrated the association between lower integrity of peripheral vascular endothelium and white matter (WM) microstructure.

Study Design: Microvascular endothelial function was evaluated using brachial artery post-occlusive reactive hyperemia (PORH), in which endothelial responses are measured under reduced blood flow and after blood flow is restored.

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Resolving the molecular basis of a Mendelian condition remains challenging owing to the diverse mechanisms by which genetic variants cause disease. To address this, we developed a synchronized long-read genome, methylome, epigenome and transcriptome sequencing approach, which enables accurate single-nucleotide, insertion-deletion and structural variant calling and diploid de novo genome assembly. This permits the simultaneous elucidation of haplotype-resolved CpG methylation, chromatin accessibility and full-length transcript information in a single long-read sequencing run.

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Article Synopsis
  • - A new fire suppression gel foam (FSGF) was developed to enhance flame resistance for liquid fuel fires, showing better performance compared to traditional aqueous film-forming foam (AFFF).
  • - The FSGF demonstrated improved thermal stability and extinguishing capabilities, with tests indicating it takes 72 seconds to extinguish fires and resists re-ignition for 801 seconds.
  • - Molecular dynamics simulations revealed that a porosity layer on the foam's film helps with heat resistance, while calcium compounds in the foam promote the formation of char that aids in fire suppression.
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Background: Sensitisation to is linked to worse outcomes in patients with COPD; however, its prevalence and clinical implications in domestic (residential) settings remains unknown.

Methods: Individuals with COPD (n=43) recruited in Singapore had their residences prospectively sampled and assessed by shotgun metagenomic sequencing including indoor air, outdoor air and touch surfaces (a total of 126 specimens). The abundance of environmental and the occurrence of (Asp f) allergens in the environment were determined and immunological responses to allergens determined in association with clinical outcomes including exacerbation frequency.

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With rapid advancements in aerospace and supersonic aircraft technology, there is a growing demand for multifunctional thermal protective materials. Aerogels, known for their low density and high porosity, have garnered significant attention in this regard. However, developing a lightweight multifunctional aerogel that combines exceptional thermal and mechanical properties through a straightforward and time-efficient method remains a significant challenge.

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