Compensating for the effects of temperature is a crucial issue in structural health monitoring when using optical fiber sensors. This study focused on the change in sensitivity due to differences in GeO2 and B2O3 doping and then verified the accuracy when measuring the strain and temperature distributions simultaneously. Four types of optical fiber sensors were utilized to measure the strain and temperature in four-point bending tests, and the best combination of the sensors resulted in strain and temperature errors of 28.4 μϵ and 1.52 °C, respectively. Based on the results obtained from the four-point bending tests, we discussed the error factors via an error propagation analysis. The results of the error propagation analysis agreed well with the experimental results, thus indicating the effectiveness of the analysis as a method for verifying accuracy and error factors.
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http://dx.doi.org/10.3390/s23031156 | DOI Listing |
ACS Sens
January 2025
Department of Surgery, Division of Pediatric Surgery, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States.
Necrotizing enterocolitis (NEC) is a devastating disease of the neonatal gastrointestinal tract. Volatile organic compounds (VOCs), odoriferous compounds released as a byproduct of bacterial metabolism, can be used as a proxy for gut health. We hypothesized that patients with NEC would have different microbial profiles and elicit different VOC signatures as assessed by gas chromatography/mass spectrometry (GC/MS) or an electronic nose compared to controls.
View Article and Find Full Text PDFRSC Chem Biol
January 2025
Department of Chemical and Biological Engineering, University of Wisconsin - Madison Madison Wisconsin 53706 USA
Cyanobacteria are widespread, photosynthetic, gram-negative bacteria that generate numerous bioactive secondary metabolites complex biosynthetic enzymatic machinery. The model cyanobacterium sp. strain PCC 7002, hereafter referred to as PCC 7002, contains a type I polyketide synthase (PKS), termed olefin synthase (OlsWT), that synthesizes 1-nonadecene and 1,14-nonadecadiene: α-olefins that are important for growth at low temperatures.
View Article and Find Full Text PDFACS ES T Eng
January 2025
Department of Molecular Biology, School of Biological Sciences, University of California San Diego, La Jolla, San Diego, California 92093, United States.
Microalgae offer a compelling platform for the production of commodity products, due to their superior photosynthetic efficiency, adaptability to nonarable lands and nonpotable water, and their capacity to produce a versatile array of bioproducts, including biofuels and biomaterials. However, the scalability of microalgae as a bioresource has been hindered by challenges such as costly biomass production related to vulnerability to pond crashes during large-scale cultivation. This study presents a pipeline for the genetic engineering and pilot-scale production of biodiesel and thermoplastic polyurethane precursors in the extremophile species .
View Article and Find Full Text PDFPhys Chem Chem Phys
January 2025
School of Physics and Electronics, Hunan University, Changsha 410082, China.
Two-dimensional (2D) Janus structures with the breaking of out-of-plane mirror symmetry can induce many interesting physical phenomena, and have attracted widespread attention. Herein, we propose a MoPS monolayer with mirror asymmetry, identified by first-principles structural search calculations, which demonstrates high thermodynamic and dynamic stability. Our findings reveal that Mo 4d-orbitals dominate the metallicity, significantly enhancing the density of states near the Fermi level due to Van Hove singularities (VHSs), leading to the existence of phonon-mediated superconductivity.
View Article and Find Full Text PDFPublic Health Nurs
January 2025
Three Rivers Department of Rural Health, Charles Sturt University, Wagga Wagga, NSW, Australia.
Background: Rising global temperatures and increased use of personal protective equipment has led to increased risk of heat stress amongst healthcare professionals. This review synthesizes recent research on the impact of heat and heat mitigation strategies on healthcare professionals across disciplines and settings.
Method: Databases were systematically searched using keywords and data from included studies were extracted for content analysis.
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