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JOURNAL ARTICLE
Alex Castro, Brian William Bodah, Alcindo Neckel, Jennifer Domeneghini, Laércio Stolfo Maculan, Emanuelle Goellner, Luis F O Silva
The dangerous chemical elements associated with nanoparticles (NPs) and ultra-fine sediment particles in hydrological bays have the capacity to move contaminants to large oceanic regions. The general objective of this study is to quantify the major chemical elements present in NPs and ultra-fine particles in aquatic sediments sampled from Guanabara Bay and compare these data to values determined through spectral optics using the Sentinel-3B Satellite OLCI (Ocean Land Color Instrument) during the winter and summer seasons of 2018, 2019, 2020, 2021, and 2022...
March 25, 2024: Environmental Science and Pollution Research International
#22
JOURNAL ARTICLE
Ludwig Richtmann, Thorsten Opel, Marina Maier, Nico Langhof, Stephan Clemens
Research on airborne ultrafine particles (UFP) is driven by an increasing awareness of their potential effects on human health and on ecosystems. Brake wear is an important UFP source releasing largely metallic and potentially hazardous emissions. UFP uptake into plant tissues could mediate entry into food webs. Still, the effects of these particles on plants have barely been studied, especially in a realistic setting with aerial exposure. In this study, we established a system designed to mimic airborne exposure to ultrafine brake dust particles and performed experiments with the model species Arabidopsis thaliana...
March 19, 2024: Journal of Hazardous Materials
#23
JOURNAL ARTICLE
Hui Wu, Guanglin Xia, Xuebin Yu
Iron sulfides have attracted tremendous research interest for the anode of sodium-ion batteries due to their high capacity and abundant resource. However, the intrinsic pulverization and aggregation of iron sulfide electrodes induced by the conversion reaction during cycling are considered destructive and undesirable, which often impedes their capacity, rate capability, and long-term cycling stability. Herein, an interesting pulverization phenomenon of ultrathin carbon-coated Fe1- x S nanoplates (Fe1- x S@C) is observed during the first discharge process of sodium-ion batteries, which leads to the formation of Fe1- x S nanoparticles with quantum size (≈5 nm) tightly embedded in the carbon matrix...
March 21, 2024: Small
#24
JOURNAL ARTICLE
Mary-Luyza Avramescu, Katherine Casey, Christine Levesque, Jian Chen, Clare Wiseman, Suzanne Beauchemin
Resuspension of road dust is a major source of airborne particulate matter (PM) in urban environments. Inhalation of ultrafine particles (UFP; < 0.1 μm) represents a health concern due to their ability to reach the alveoli and be translocated into the blood stream. It is therefore important to characterize chemical properties of UFPs associated with vehicle emissions. We investigated the capability of Single-Particle ICP-MS (SP-ICP-MS) to quantify key metal(loid)s in nanoparticles (NPs; < 0...
March 13, 2024: Science of the Total Environment
#25
JOURNAL ARTICLE
Lu Liu, Jingwen Xu, Ge Zhang, Nisi Gao, Xuebing Xu, Renyong Zhao
Effects of ultrafine grinding on the nutritional profile, physicochemical properties, and antioxidant activities of whole-grain highland barley (HB) including white highland barley (WHB) and black highland barley (BHB) were studied. Whole-grain HB was regularly ground and sieved through 80 mesh get 80 M powder, and HB was ultrafine grounded and sieved through 80 mesh, 150 mesh, and 200 mesh get 80UMM, 150UMM, and 200UMM samples. Particle size of WHB and BHB reduced significantly after ultrafine grinding. As the particle size decreased, moisture content of WHB and BHB decreased significantly, whereas fat content increased significantly...
March 15, 2024: Journal of Food Science
#26
JOURNAL ARTICLE
Fan Liu, Wenbo Li, Yuan Liang, Xianhua Zhang, Dongxiao Ji, Hengtao Liang, Mengyu Yuan, Yanchao Zhao, Haozhe Tang, Xiang Li, Jianxin He, Weili Shao
Functional materials that can quickly absorb and degrade mustard gas are essential for chemical warfare emergency response kits. In this study, a fiber membrane with excellent adsorption and catalytic degradation activity was developed by solution blow spinning polystyrene (PS)/polyurethane (PU) and hydrothermal in situ growth of a zirconium-based MOF (MOF-808). The mechanical properties of the PS/PU fibers were improved by adding a trimethylolpropane tris (2-methyl-1-aziridine propionate) (TTMA) cross-linking agent...
March 15, 2024: ACS Applied Materials & Interfaces
#27
JOURNAL ARTICLE
Krister Aune Teigen, Anje Christina Höper, Solveig Føreland, Merete Åse Eggesbø, Marit Nøst Hegseth
BACKGROUND: The objective was to investigate self-reported hand eczema, and skin complaints at other skin locations among workers exposed to particulate matter, especially ultrafine particles. METHOD: We conducted a cross-sectional study on workers from one ferro-silicon smelter plant, eight chimney sweeper stations and one firefighter station across Norway. Participants answered an extended version of the Nordic Occupational Skin Questionnaire (NOSQ-2022), with additional questions about whole-body skin complaints and visible dust deposition...
March 14, 2024: Journal of Occupational Medicine and Toxicology
#28
JOURNAL ARTICLE
J A Apte, S E Chambliss, K P Messier, S Gani, A R Upadhya, M Kushwaha, V Sreekanth
INTRODUCTION: The absence of spatially resolved air pollution measurements remains a major gap in health studies of air pollution, especially in disadvantaged communities in the United States and lower-income countries. Many urban air pollutants vary over short spatial scales, owing to unevenly distributed emissions sources, rapid dilution away from sources, and physicochemical transformations. Primary air pollutants from traffic have especially sharp spatial gradients, which lead to disparate effects on human health for populations who live near air pollution sources, with important consequences for environmental justice...
January 2024: Research Report (Res Rep Health Eff Inst)
#29
JOURNAL ARTICLE
Shivam Singh, Sajana S, Poornima Varma, Gajje Sreelekha, Chandranath Adak, Rajendra P Shukla, Vinayak B Kamble
Detection of volatile organic compounds (VOCs) from the breath is becoming a viable route for the early detection of diseases non-invasively. This paper presents a sensor array of 3 component metal oxides that give maximal cross-sensitivity and can successfully use machine learning methods to identify four distinct VOCs in a mixture. The metal oxide sensor array comprises NiO-Au (ohmic), CuO-Au (Schottky), and ZnO-Au (Schottky) sensors made by the DC reactive sputtering method and having a film thickness of 80-100 nm...
March 13, 2024: Mikrochimica Acta
#30
JOURNAL ARTICLE
Chanchan Wang, Fen Wang, Jianjun Shi
Catalytic oxidation is widely recognized as a highly effective approach for eliminating highly toxic CO. The current challenge lies in designing catalysts that possess exceptional low-temperature activity and stability. In this work, we have prepared ultrafine platinum particles of ~1 nm diameter dispersed on a MgFe2 O4 support and found that the addition of 3 wt.% FeOx into the 3Pt/MgFe2 O4 significantly improves its activity and stability. At an ultra-low temperature of 30 °C, the CO can be totally converted to CO2 over 3FeOx -3Pt/MgFe2 O4 ...
February 27, 2024: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
#31
JOURNAL ARTICLE
Guohua Bai, Jiayi Sun, Zhenhua Zhang, Xiaolian Liu, Sateesh Bandaru, Weiwei Liu, Zhong Li, Hongxia Li, Ningning Wang, Xuefeng Zhang
Soft magnetic materials with stable permeability up to hundreds of megahertz (MHz) are urgently needed for integrated transformers and inductors, which are crucial in the more-than-Moore era. However, traditional frequency-stable soft magnetic ferrites suffer from low saturation magnetization and temperature instability, making them unsuitable for integrated circuits. Herein, we fabricate a frequency-stable soft magnetic composite featuring a magnetic vortex structure via cold-sintering, where ultrafine FeSiAl particles are magnetically isolated and covalently bonded by Al2 SiO5 /SiO2 /Fe2 (MoO4 )3 multilayered heterostructure...
March 12, 2024: Nature Communications
#32
JOURNAL ARTICLE
Hiroki Nakamura, Akira Yamamoto, Takeshi Fukunaga, Hiroyuki Watanabe, Kosuke Ito, Atushi Higaki, Akihiko Kanki, Yoshihiko Fukukura, Tsutomu Tamada
BACKGROUND: Imipenem/cilastatin (IPM/CS) has long been administered intravenously as a carbapenem antibiotic. However, since this agent is poorly soluble in liquid, occasional reports have described its use as a short-acting, temporary embolic agent. The purpose of this study was to elucidate the characteristics of IPM/CS particles, which are thought to have pain-relieving effects against osteoarthritis-related pain, as an embolic agent. METHODS: Three aspects of IPM/CS as an embolic agent were evaluated in vitro: particle size; particle shape; and change in particle size over time...
March 11, 2024: CVIR Endovascular
#33
JOURNAL ARTICLE
Zheng Tong, Jing Lu, Xinnan Hu, Xiangning Bu, Yujin Sun, Yuran Chen, Saeed Chehreh Chelgani
With the severe depletion of coarse flake graphite (a critical raw material) resources, developing and utilizing fine and ultrafine graphite resources have recently attracted attention. Froth flotation is a widely used technique for the initial enrichment of graphite; however, the flotation selectivity decreases significantly along with particle size reduction. Ultrasound pretreatment would be a promising method to improve the flotation of fine particles. As an innovative approach to understand better the flotation response of different flake graphite sizes, this study conducted a comparative analysis based on flotation concentrate yield and ash as well as ash removal rate between the flake graphite with various particle sizes after ultrasound pretreatment...
March 5, 2024: ACS Omega
#34
REVIEW
Chengmei Yin, Xiangyao Chen, Haiyang Zhang, Yong Xue, Hao Dong, Xiangzhao Mao
Non-homogeneous enzyme-catalyzed systems are more widely used than homogeneous systems. Distinguished from the conventional biphasic approach, Pickering emulsion stabilized by ultrafine solid particles opens up an innovative platform for biocatalysis. Their vast specific surface area significantly enhances enzyme-substrate interactions, dramatically increasing catalytic efficiency. This review comprehensively explores various aspects of Pickering emulsion biocatalysis, provides insights into the multiple types and mechanisms of its catalysis, and offers strategies for material design, enzyme immobilization, emulsion formation control, and reactor design...
March 7, 2024: Biotechnology Advances
#35
JOURNAL ARTICLE
Meritxell Garcia-Marlès, Rosa Lara, Cristina Reche, Noemí Pérez, Aurelio Tobías, Marjan Savadkoohi, David Beddows, Imre Salma, Máté Vörösmarty, Tamás Weidinger, Christoph Hueglin, Nikos Mihalopoulos, Georgios Grivas, Panayiotis Kalkavouras, Jakub Ondráček, Nadĕžda Zíková, Jarkko V Niemi, Hanna E Manninen, David C Green, Anja H Tremper, Michael Norman, Stergios Vratolis, Konstantinos Eleftheriadis, Francisco J Gómez-Moreno, Elisabeth Alonso-Blanco, Alfred Wiedensohler, Kay Weinhold, Maik Merkel, Susanne Bastian, Barbara Hoffmann, Hicran Altug, Jean-Eudes Petit, Olivier Favez, Sebastiao Martins Dos Santos, Jean-Philippe Putaud, Adelaide Dinoi, Daniele Contini, Hilkka Timonen, Janne Lampilahti, Tuukka Petäjä, Marco Pandolfi, Philip K Hopke, Roy M Harrison, Andrés Alastuey, Xavier Querol
Ultrafine particles (UFP, those with diameters ≤ 100 nm), have been reported to potentially penetrate deeply into the respiratory system, translocate through the alveoli, and affect various organs, potentially correlating with increased mortality. The aim of this study is to assess long-term trends (5-11 years) in mostly urban UFP concentrations based on measurements of particle number size distributions (PNSD). Additionally, concentrations of other pollutants and meteorological variables were evaluated to support the interpretations...
February 17, 2024: Environment International
#36
JOURNAL ARTICLE
Patricia Krecl, Christer Johansson, Michael Norman, Sanna Silvergren, Lars Burman, Eva Maria Mollinedo, Admir Créso Targino
Black carbon (BC) and particle number (PN) concentrations are usually high in cities due to traffic emissions. European mitigation policies, including Euro emission standards, have been implemented to curb these emissions. We analyzed BC and PN (particle diameter Dp > 4 nm) concentrations in Stockholm spanning the years 2013-2019 (BC) and 2009-2019 (PN) measured at street canyon and rooftop sites to assess the effectiveness of the implemented policies. Combining these data with inverse dispersion modeling, we estimated BC and PN emission factors (EFBC and EFPN ) for the mixed fleet, reflecting real-world driving conditions...
March 6, 2024: Environmental Pollution
#37
JOURNAL ARTICLE
Yung-Sheng Chuang, Abiyu Kerebo Berekute, Hsuan-Yu Hsu, Ho-Sheng Wei, Wen-Cheng Gong, Ya-Yuan Hsu, Chuen-Jinn Tsai, Kuo-Pin Yu
Three-dimensional (3D) printing is an emerging and booming industry in Taiwan. Compared to traditional manufacturing, 3D printing has various advantages, such as advanced customization, additive manufacturing, reduced mold opening time, and reduced consumption of precursors. In this study, the real-time monitoring of particulate matter (PM) and total volatile organic compound (TVOC) emissions from various filaments is investigated using fused deposition modeling with material extrusion technology, a liquid-crystal display, a stereolithography apparatus based on vat photopolymerization technology, and binder jetting for occupational settings...
March 7, 2024: Journal of Occupational and Environmental Hygiene
#38
JOURNAL ARTICLE
Ian Trees, Fangqun Yu, Xinlei Deng, Gan Luo, Wangjian Zhang, Shao Lin
RATIONALE: Exposure to particulate matter is associated with various adverse health outcomes. Ultrafine particles are a unique public health challenge due to their size. However, limited studies have examined their impacts on human health, especially across seasons and demographics. OBJECTIVES: To evaluate the effect of ultrafine particle exposure on the risk of visiting the emergency department for a chronic lower respiratory disease in New York State NYS, 2013-2018...
March 6, 2024: Annals of the American Thoracic Society
#39
JOURNAL ARTICLE
Philip K Hopke, Yunle Chen, David C Chalupa, David Q Rich
During the past two decades, efforts have been made to further reduce particulate air pollution across New York State through various Federal and State policy implementations. Air quality has also been affected by economic drivers like the 2007-2009 recession and changing costs for different approaches to electricity generation. Prior work has focused on particulate matter with aerodynamic diameter ≤2.5 μm. However, there is also interest in the effects of ultrafine particles on health and the environment and analyses of changes in particle number concentrations (PNCs) are also of interest to assess the impacts of changing emissions...
March 3, 2024: Environmental Pollution
#40
JOURNAL ARTICLE
Yue Zou, Xiaowei Liu, Kui Wu, Zijian Zhou, Minghou Xu
Condensable particulate matter (CPM) from coal combustion is the focus of current pollutant emission studies, and CPM can be divided into inorganic and organic fractions according to the component characteristics. At present, the effects of different factors in the combustion process on the organic and inorganic components of CPM have not been discussed systematically. Here, we conducted combustion experiments collected the generated CPM on a well-controlled drip tube furnace, and investigated the effects of different factors on the generation of organic and inorganic components of CPM by varying the furnace wall insulation temperature, the ratio of gas supply components and the water vapor content in the flue gas...
March 3, 2024: Chemosphere
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