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Ali Al Saidi AK, Ghazanfari A, Baek A, Tegafaw T, Ahmad MY, Zhao D, Liu Y, Yang JU, Park JA, Yang BW, Chae KS, Nam SW, Chang Y, Lee GH. Ultrasmall cerium oxide nanoparticles as highly sensitive X-ray contrast agents and their antioxidant effect. RSC Adv 2024; 14:3647-3658. [PMID: 38268539 PMCID: PMC10805080 DOI: 10.1039/d3ra08372a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 01/15/2024] [Indexed: 01/26/2024] Open
Abstract
Owing to their theranostic properties, cerium oxide (CeO2) nanoparticles have attracted considerable attention for their key applications in nanomedicine. In this study, ultrasmall CeO2 nanoparticles (particle diameter = 1-3 nm) as X-ray contrast agents with an antioxidant effect were investigated for the first time. The nanoparticles were coated with hydrophilic and biocompatible poly(acrylic acid) (PAA) and poly(acrylic acid-co-maleic acid) (PAAMA) to ensure satisfactory colloidal stability in aqueous media and low cellular toxicity. The synthesized nanoparticles were characterized using high-resolution transmission electron microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, thermogravimetric analysis, dynamic light scattering, cell viability assay, photoluminescence spectroscopy, and X-ray computed tomography (CT). Their potential as X-ray contrast agents was demonstrated by measuring phantom images and in vivo CT images in mice injected intravenously and intraperitoneally. The X-ray attenuation of these nanoparticles was greater than that of the commercial X-ray contrast agent Ultravist and those of larger CeO2 nanoparticles reported previously. In addition, they exhibited an antioxidant effect for the removal of hydrogen peroxide. The results confirmed that the PAA- and PAAMA-coated ultrasmall CeO2 nanoparticles demonstrate potential as highly sensitive radioprotective or theranostic X-ray contrast agents.
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Affiliation(s)
| | - Adibehalsadat Ghazanfari
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Ahrum Baek
- Institute of Biomedical Engineering, School of Medicine, Kyungpook National University Taegu 41944 South Korea
| | - Tirusew Tegafaw
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Mohammad Yaseen Ahmad
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Dejun Zhao
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Ying Liu
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Ji-Ung Yang
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences Seoul 01812 South Korea
| | - Ji Ae Park
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences Seoul 01812 South Korea
| | - Byeong Woo Yang
- Theranocure Medlifescience Bldg. 1, Chilgok, Bukgu Taegu 41405 South Korea
| | - Kwon Seok Chae
- Department of Biology Education, Teachers' College, Kyungpook National University Taegu 41566 South Korea
| | - Sung-Wook Nam
- Department of Molecular Medicine, School of Medicine, Kyungpook National University Taegu 41944 South Korea
| | - Yongmin Chang
- Department of Molecular Medicine, School of Medicine, Kyungpook National University Taegu 41944 South Korea
| | - Gang Ho Lee
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
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Dizbay Sak S, Sevim S, Buyuksungur A, Kayı Cangır A, Orhan K. The Value of Micro-CT in the Diagnosis of Lung Carcinoma: A Radio-Histopathological Perspective. Diagnostics (Basel) 2023; 13:3262. [PMID: 37892083 PMCID: PMC10606474 DOI: 10.3390/diagnostics13203262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/12/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Micro-computed tomography (micro-CT) is a relatively new imaging modality and the three-dimensional (3D) images obtained via micro-CT allow researchers to collect both quantitative and qualitative information on various types of samples. Micro-CT could potentially be used to examine human diseases and several studies have been published on this topic in the last decade. In this study, the potential uses of micro-CT in understanding and evaluating lung carcinoma and the relevant studies conducted on lung and other tumors are summarized. Currently, the resolution of benchtop laboratory micro-CT units has not reached the levels that can be obtained with light microscopy, and it is not possible to detect the histopathological features (e.g., tumor type, adenocarcinoma pattern, spread through air spaces) required for lung cancer management. However, its ability to provide 3D images in any plane of section, without disturbing the integrity of the specimen, suggests that it can be used as an auxiliary technique, especially in surgical margin examination, the evaluation of tumor invasion in the entire specimen, and calculation of primary and metastatic tumor volume. Along with future developments in micro-CT technology, it can be expected that the image resolution will gradually improve, the examination time will decrease, and the relevant software will be more user friendly. As a result of these developments, micro-CT may enter pathology laboratories as an auxiliary method in the pathological evaluation of lung tumors. However, the safety, performance, and cost effectiveness of micro-CT in the areas of possible clinical application should be investigated. If micro-CT passes all these tests, it may lead to the convergence of radiology and pathology applications performed independently in separate units today, and the birth of a new type of diagnostician who has equal knowledge of the histological and radiological features of tumors.
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Affiliation(s)
- Serpil Dizbay Sak
- Department of Pathology, Faculty of Medicine, Ankara University, Ankara 06230, Turkey
| | - Selim Sevim
- Department of Pathology, Faculty of Medicine, Ankara University, Ankara 06230, Turkey
| | - Arda Buyuksungur
- Department of Basic Medical Sciences, Faculty of Dentistry, Ankara University, Ankara 06560, Turkey
| | - Ayten Kayı Cangır
- Department of Thoracic Surgery Ankara, Faculty of Medicine, Ankara University, Ankara 06230, Turkey
| | - Kaan Orhan
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara 06560, Turkey
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Wang YD, Meyer Q, Tang K, McClure JE, White RT, Kelly ST, Crawford MM, Iacoviello F, Brett DJL, Shearing PR, Mostaghimi P, Zhao C, Armstrong RT. Large-scale physically accurate modelling of real proton exchange membrane fuel cell with deep learning. Nat Commun 2023; 14:745. [PMID: 36788206 PMCID: PMC9929041 DOI: 10.1038/s41467-023-35973-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 01/10/2023] [Indexed: 02/16/2023] Open
Abstract
Proton exchange membrane fuel cells, consuming hydrogen and oxygen to generate clean electricity and water, suffer acute liquid water challenges. Accurate liquid water modelling is inherently challenging due to the multi-phase, multi-component, reactive dynamics within multi-scale, multi-layered porous media. In addition, currently inadequate imaging and modelling capabilities are limiting simulations to small areas (<1 mm2) or simplified architectures. Herein, an advancement in water modelling is achieved using X-ray micro-computed tomography, deep learned super-resolution, multi-label segmentation, and direct multi-phase simulation. The resulting image is the most resolved domain (16 mm2 with 700 nm voxel resolution) and the largest direct multi-phase flow simulation of a fuel cell. This generalisable approach unveils multi-scale water clustering and transport mechanisms over large dry and flooded areas in the gas diffusion layer and flow fields, paving the way for next generation proton exchange membrane fuel cells with optimised structures and wettabilities.
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Affiliation(s)
- Ying Da Wang
- grid.1005.40000 0004 4902 0432School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, NSW 2052 Australia
| | - Quentin Meyer
- School of Chemistry, University of New South Wales, Sydney, NSW, 2052, Australia.
| | - Kunning Tang
- grid.1005.40000 0004 4902 0432School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, NSW 2052 Australia
| | - James E. McClure
- grid.438526.e0000 0001 0694 4940National Security Institute, Virginia Tech, Blacksburg, VA 24061 USA
| | - Robin T. White
- Carl Zeiss X-ray Microscopy, ZEISS Innovation Center California, Dublin, CA 94568 USA
| | - Stephen T. Kelly
- Carl Zeiss X-ray Microscopy, ZEISS Innovation Center California, Dublin, CA 94568 USA
| | | | - Francesco Iacoviello
- grid.83440.3b0000000121901201Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE UK
| | - Dan J. L. Brett
- grid.83440.3b0000000121901201Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE UK
| | - Paul R. Shearing
- grid.83440.3b0000000121901201Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE UK
| | - Peyman Mostaghimi
- grid.1005.40000 0004 4902 0432School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, NSW 2052 Australia
| | - Chuan Zhao
- School of Chemistry, University of New South Wales, Sydney, NSW, 2052, Australia.
| | - Ryan T. Armstrong
- grid.1005.40000 0004 4902 0432School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, NSW 2052 Australia
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Towards routine 3D characterization of intact mesoscale samples by multi-scale and multimodal scanning X-ray tomography. Sci Rep 2022; 12:16924. [PMID: 36209291 PMCID: PMC9547857 DOI: 10.1038/s41598-022-21368-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 09/26/2022] [Indexed: 12/29/2022] Open
Abstract
Non-invasive multi-scale and multimodal 3D characterization of heterogeneous or hierarchically structured intact mesoscale samples is of paramount importance in tackling challenging scientific problems. Scanning hard X-ray tomography techniques providing simultaneous complementary 3D information are ideally suited to such studies. However, the implementation of a robust on-site workflow remains the bottleneck for the widespread application of these powerful multimodal tomography methods. In this paper, we describe the development and implementation of such a robust, holistic workflow, including semi-automatic data reconstruction. Due to its flexibility, our approach is especially well suited for on-the-fly tuning of the experiments to study features of interest progressively at different length scales. To demonstrate the performance of the method, we studied, across multiple length scales, the elemental abundances and morphology of two complex biological systems, Arabidopsis plant seeds and mouse renal papilla samples. The proposed approach opens the way towards routine multimodal 3D characterization of intact samples by providing relevant information from pertinent sample regions in a wide range of scientific fields such as biology, geology, and material sciences.
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Jang SH, Lee J, Lee O. Micro- and nano-tomography analysis of mouse soleus muscle using radiation. Microsc Res Tech 2021; 84:2685-2693. [PMID: 34021519 DOI: 10.1002/jemt.23819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 04/13/2021] [Accepted: 05/02/2021] [Indexed: 11/10/2022]
Abstract
In this study, we analyze radiation images of muscle structure of mice soleus muscles using radiation source-based microtomography and nanotomography. Soleus muscle samples were collected for analysis from 8-week-old male Institute of Cancer Research mice. First, phase-contrast X-ray microtomography was employed in these experiments. Then to obtain images with excellent contrast, imaging was performed using monochromatic light with excellent transmission power. To analyze additional muscle structures in higher magnification images than these images, nanotomography was performed, which facilitated obtaining high-magnification and high-resolution images. Muscle tissue microstructures were confirmed through three-dimensional images obtained from phase-contrast X-ray microtomography. Thus, the muscle tissue's overall shape at microscopic level can be captured. Additionally, a single muscle fiber was examined using hard X-ray nano-imaging, through which we could observe the alignment of countless myofibrils, that is, actin and myosin filaments in the muscle fibers. Thus, the methodology adopted here proved to be advantageous in analyzing the muscle tissue's overall structure with microtomography and in observing the myofibrils in detail using nanotomography.
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Affiliation(s)
- Sang-Hun Jang
- Department of Physical Therapy, College of Health and Life Science, Korea National University of Transportation, Jeungpyeong-eup, Chungbuk, Republic of Korea
| | - Jiwon Lee
- Department of Software Convergence, Graduate School, Soonchunhyang University, Asan City, Chungnam, Republic of Korea
| | - Onseok Lee
- Department of Software Convergence, Graduate School, Soonchunhyang University, Asan City, Chungnam, Republic of Korea.,Department of Medical IT Engineering, College of Medical Sciences, Soonchunhyang University, Asan City, Chungnam, Republic of Korea
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Courtois P, Rorat A, Lemiere S, Levard C, Chaurand P, Grobelak A, Lors C, Vandenbulcke F. Accumulation, speciation and localization of silver nanoparticles in the earthworm Eisenia fetida. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:3756-3765. [PMID: 32270459 DOI: 10.1007/s11356-020-08548-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 03/23/2020] [Indexed: 06/11/2023]
Abstract
The use of silver nanoparticles (AgNPs) in agriculture and many consumer products has led to a significant release of Ag in the environment. Although Ag toxicity in terrestrial organisms has been studied extensively, very little is known about the accumulation capacity and coping mechanisms of organisms in Ag-contaminated soil. In this context, we exposed Eisenia fetida earthworms to artificial OECD soil spiked with a range of concentrations of Ag (AgNPs or AgNO3). The main aims were to (1) identify the location and form of accumulation of Ag in the exposed earthworms and (2) better understand the physiological mechanisms involved in Ag detoxification. The results showed that similar doses of AgNPs or AgNO3 did not have the same effect on E. fetida survival. The two forms of Ag added to soil exhibited substantial differences in speciation at the end of exposure, but the Ag speciation and content of Ag in earthworms were similar, suggesting that biotransformation of Ag occurred. Finally, 3D images of intact earthworms obtained by X-ray micro-computed tomography revealed that Ag accumulated preferentially in the chloragogen tissue, coelomocytes, and nephridial epithelium. Thus, E. fetida bioaccumulates Ag, but a regulation mechanism limits its impact in a very efficient manner. The location of Ag in the organism, the competition between Ag and Cu, and the speciation of internal Ag suggest a link between Ag and the thiol-rich proteins that are widely present in these tissues, most probably metallothioneins, which are key proteins in the sequestration and detoxification of metals.
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Affiliation(s)
- Pauline Courtois
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR 4515, - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000, Lille, France
| | - Agnieszka Rorat
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR 4515, - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000, Lille, France
| | - Sébastien Lemiere
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR 4515, - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000, Lille, France
| | - Clément Levard
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France
| | - Perrine Chaurand
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France
| | - Anna Grobelak
- Institute of Environmental Engineering, Faculty of Infrastructure and Environment, Czestochowa University of Technology, Czestochowa, Poland
| | - Christine Lors
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR 4515, - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000, Lille, France
| | - Franck Vandenbulcke
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR 4515, - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000, Lille, France.
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7
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Santos de Oliveira C, González AT, Hedtke T, Kürbitz T, Heilmann A, Schmelzer CEH, Martins de S E Silva J. Direct three-dimensional imaging for morphological analysis of electrospun fibers with laboratory-based Zernike X-ray phase-contrast computed tomography. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 115:111045. [PMID: 32600682 DOI: 10.1016/j.msec.2020.111045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 04/30/2020] [Accepted: 05/01/2020] [Indexed: 10/24/2022]
Abstract
Electrospinning is a well-established and widely used method for the production of protein-based fibrous biomaterials. The visualization of the morphology and the characterization of sample features related to the three-dimensional (3D) structure, like the porosity and fibers thickness, is crucial for the design and fabrication of tailor-made and application-optimized materials. Here, we evaluated the benefits of using 3D X-ray imaging in a laboratory setup with a resolution in the sub-micrometer range for the characterization of electrospun gelatin fibrous mats. We used phase-contrast X-ray computed tomography at the nanoscale (nano-CT) for the evaluation of the time-course morphological changes of the mats induced by chemical cross-linking of the gelatin fibers. We present an image processing protocol that enables the segmentation of the fibers and quantification of the mats porosity, the analysis of the shape and size of the pores, and of the fibers thickness and orientation. We compared the results obtained from the processed nano-CT data with those obtained with the conventional methods used for the characterization of electrospun fibrous materials, and we discuss the advantages and limitations of each method when applied to gelatin electrospun samples. Our results reveal that the use of phase-contrast nano-CT provides quick additional and relevant information for the characterization of fibrous mats and, thus, provides beneficial insights for the design and fabrication of novel fibrous materials.
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Affiliation(s)
| | | | - Tobias Hedtke
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany; Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Halle (Saale), Germany
| | | | - Andreas Heilmann
- Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Halle (Saale), Germany; Anhalt University of Applied Sciences, Köthen, Germany
| | - Christian E H Schmelzer
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany; Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Halle (Saale), Germany.
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Abdolahpur Monikh F, Chupani L, Vijver MG, Vancová M, Peijnenburg WJGM. Analytical approaches for characterizing and quantifying engineered nanoparticles in biological matrices from an (eco)toxicological perspective: old challenges, new methods and techniques. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 660:1283-1293. [PMID: 30743923 DOI: 10.1016/j.scitotenv.2019.01.105] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/09/2019] [Accepted: 01/10/2019] [Indexed: 06/09/2023]
Abstract
To promote the safer by design strategy and assess environmental risks of engineered nanoparticles (ENPs), it is essential to understand the fate of ENPs within organisms. This understanding in living organisms is limited by challenges in characterizing and quantifying ENPs in biological media. Relevant literature in this area is scattered across research from the past decade or so, and it consists mostly of medically oriented studies. This review first introduces those modern techniques and methods that can be used to extract, characterize, and quantify ENPs in biological matrices for (eco)toxicological purposes. It then summarizes recent research developments within those areas most relevant to the context and field that are the subject of this review paper. These comprise numerous in-situ techniques and some ex-situ techniques. The former group includes techniques allowing to observe specimens in their natural hydrated state (e.g., scanning electron microscopy working in cryo mode and high-pressure freezing) and microscopy equipped with elemental microanalysis (e.g., energy-dispersive X-ray spectroscopy); two-photon laser and coherent anti-Stokes Raman scattering microscopy; absorption-edge synchrotron X-ray computed microtomography; and laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS). The latter group includes asymmetric flow field flow fractionation coupled with ICP-MS and single particle-ICP-MS. Our review found that most of the evidence gathered for ENPs actually focused on a few metal-based ENPs and carbon nanotube and points to total mass concentration but no other particles properties, such as size and number. Based on the obtained knowledge, we developed and presented a decision scheme and analytical toolbox to help orient scientists toward selecting appropriate ways for investigating the (eco)toxicity of ENPs that are consistent with their properties.
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Affiliation(s)
- Fazel Abdolahpur Monikh
- Institute of Environmental Sciences (CML), Leiden University, P.O. Box 9518, 2300, RA, Leiden, Netherlands.
| | - Latifeh Chupani
- South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, Vodňany, Czech Republic
| | - Martina G Vijver
- Institute of Environmental Sciences (CML), Leiden University, P.O. Box 9518, 2300, RA, Leiden, Netherlands
| | - Marie Vancová
- Biology Centre of the Academy of Sciences of the Czech Republic, Institute of Parasitology, Faculty of Science, University of South Bohemia, Branišovská 31, 37005 České Budějovice, Czech Republic
| | - Willie J G M Peijnenburg
- Institute of Environmental Sciences (CML), Leiden University, P.O. Box 9518, 2300, RA, Leiden, Netherlands; National Institute of Public Health and the Environment (RIVM), Center for Safety of Substances and Products, Bilthoven, Netherlands
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Niemuth NJ, Curtis BJ, Hang MN, Gallagher MJ, Fairbrother DH, Hamers RJ, Klaper RD. Next-Generation Complex Metal Oxide Nanomaterials Negatively Impact Growth and Development in the Benthic Invertebrate Chironomus riparius upon Settling. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:3860-3870. [PMID: 30871314 DOI: 10.1021/acs.est.8b06804] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Most studies of nanomaterial environmental impacts have focused on relatively simple first-generation nanomaterials, including metals or metal oxides (e.g., Ag, ZnO) for which dissolution largely accounts for toxicity. Few studies have considered nanomaterials with more complex compositions, such as complex metal oxides, which represent an emerging class of next-generation nanomaterials used in commercial products at large scales. Importantly, many nanomaterials are not colloidally stable in aqueous environments and will aggregate and settle, yet most studies use pelagic rather than benthic-dwelling organisms. Here we show that exposure of the model benthic species Chironomus riparius to lithium cobalt oxide (Li xCo1- xO2, LCO) and lithium nickel manganese cobalt oxide (Li xNi yMn zCo1- y- zO2, NMC) at 10 and 100 mg·L-1 caused 30-60% declines in larval growth and a delay of 7-25 d in adult emergence. A correlated 41-48% decline in larval hemoglobin concentration and related gene expression changes suggest a potential adverse outcome pathway. Metal ions released from nanoparticles do not cause equivalent impacts, indicating a nanospecific effect. Nanomaterials settled within 2 days and indicate higher cumulative exposures to sediment organisms than those in the water column, making this a potentially realistic environmental exposure. Differences in toxicity between NMC and LCO indicate compositional tuning may reduce material impact.
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Affiliation(s)
- Nicholas J Niemuth
- School of Freshwater Sciences , University of Wisconsin-Milwaukee , 600 East Greenfield Avenue , Milwaukee , Wisconsin 53204 , United States
| | - Becky J Curtis
- School of Freshwater Sciences , University of Wisconsin-Milwaukee , 600 East Greenfield Avenue , Milwaukee , Wisconsin 53204 , United States
| | - Mimi N Hang
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Miranda J Gallagher
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - D Howard Fairbrother
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - Robert J Hamers
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Rebecca D Klaper
- School of Freshwater Sciences , University of Wisconsin-Milwaukee , 600 East Greenfield Avenue , Milwaukee , Wisconsin 53204 , United States
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Khan MIH, Farrell T, Nagy SA, Karim MA. Fundamental Understanding of Cellular Water Transport Process in Bio-Food Material during Drying. Sci Rep 2018; 8:15191. [PMID: 30315218 PMCID: PMC6185900 DOI: 10.1038/s41598-018-33159-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 09/13/2018] [Indexed: 12/29/2022] Open
Abstract
Bio-food materials are heterogeneous in structure with cellular diversity, where the majority of the water is located in the intracellular spaces. Understanding of the nature of the microscopic behaviour of water transport is crucial to enhance the energy efficiency in food processing and obtain the better quality of processed food. In this research, apoplastic and symplastic transport of cellular water in the bio-food material during drying was investigated using 1H-NMR-T2 relaxometry. We found that intracellular water (ICW) migrates from intracellular spaces to the intercellular spaces by progressive rupturing the cell membranes while drying at a higher temperatures (60 °C-70 °C). In this case, apoplastic process dominates the transport process. However, at lower temperature (45 °C), cell membranes do not rupture and therefore ICW migrates from cell to the neighbouring cell through micro-capillaries, where the symplastic process dominates the mass transfer at different stages of drying.
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Affiliation(s)
- Md Imran H Khan
- Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
- Department of Mechanical Engineering, Dhaka University of Engineering & Technology, Gazipur, Gazipur-1700, Bangladesh
| | - Troy Farrell
- Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - S A Nagy
- MTA-PTE, Clinical Neuroscience MR Research Group, Pécs, Hungary
- Pécs Diagnostic Centre, Pécs, Hungary
- Department of Neurosurgery, University of Pécs, Medical School, Pécs, Hungary
| | - M A Karim
- Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, Queensland, Australia.
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