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Self-crystal electret poly(lactic acid) nanofibers for high-flow air purification and AI-assisted respiratory diagnosis.
J Hazard Mater
December 2024
School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China; Jiangsu Engineering Research Center of Dust Control and Occupational Protection, Xuzhou 221008, China; College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China. Electronic address:
Particulate matters (PMs), one of the major airborne pollutants, continue to seriously threaten human health and the environment. Here, a self-crystal-induced electret enhancement (SCIEE) strategy was developed to promote the in-situ electret effect and polarization properties of electrospun poly(L-lactic acid) (PLLA) nanofibers. The strategy specifically involved the elaborate pre-structuring of stereocomplex crystals (SCs) with uniform dimensions (∼300 nm), which were introduced into PLLA electrospinning solution as the electrets and physical cross-linking points of high density.
View Article and Find Full Text PDFStudy on the dynamics of radon concentration buildup in the closed-loop measurement system with RAD7 online radon monitor.
Radiat Prot Dosimetry
December 2024
Environmental Assessment Division, Indira Gandhi Center for Atomic Research, Kalpakkam, Chengalpattu District, Tamilnadu 603102, India.
Article Synopsis
- The study assesses radon and thoron exhalation rates using a closed-loop technique with online radon monitors, particularly focusing on the balance of air volume in the sample and detector chambers.
- An alternative model is proposed that treats the sample and detector chambers as separate entities, refining the mass balance equation to account for air flow rates affecting radon/thoron concentrations.
- Results indicate that while lower flow rates don't affect long-lived radon buildup, experiments showed that increasing flow rates impacts the effective removal rate of radon, suggesting potential issues with thoron interference at lower flows.
Limited uptake of [C]Gardenia Blue administered orally in male and female rats and mice.
Food Chem Toxicol
January 2025
Tokyo University of Agriculture and Technology, Tokyo, 183-8509, Japan; National Institute of Health Sciences, Kanagawa, 210-9501, Japan.
Gardenia blue (GB), a widely used plant-derived food color is prepared by reaction of genipin, the aglycone of geniposide, with protein hydrolysate. Recent animal studies investigating GB toxicity have indicated blue coloration in the gastrointestinal tract, kidneys and mesenteric lymph nodes in rodents following dietary administration. This study investigated the uptake and disposition of [C]GB in male and female rats and mice administered 100 or 1000 mg/kg by gavage.
View Article and Find Full Text PDFUltrasensitive Acetone Gas Sensor Based on a K/Sn-CoO Porous Microsphere for Noninvasive Diabetes Diagnosis.
ACS Sens
November 2024
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
Article Synopsis
- - Detecting acetone in breath can help noninvasively diagnose diabetes, but current methods struggle with high humidity and low concentration (parts per billion).
- - A new ultrasensitive acetone sensor using K/Sn-CoO porous microspheres has been developed, achieving a detection limit of 100 ppb with good selectivity and repeatability, even in humid conditions.
- - The sensor's improved sensitivity is due to better oxygen adsorption and interaction with acetone molecules, which allows it to differentiate between diabetic and healthy individuals effectively.
Novel accelerated carbonation methods based on deep breathing analogous and prediction model for pressurized carbonation of concrete.
Sci Rep
October 2024
Research Center of Space Structures, Guizhou University, Guiyang, 550025, China.
This research proposes a novel deep breathing analogy (DBA) accelerated carbonation process. Inspired by the breathing mechanism of human lungs, the DBA method involves injecting pure CO into a reaction chamber at a specific pressure (inspiration) and subsequently evacuating the gas from the chamber to a negative pressure (exhalation). This process is repeated to remove excess water from the chamber and restore optimal carbonation conditions, which further enhances the efficiency of carbonation for the sample.
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