检索结果-内蒙古大学图书馆

Synergistic effect of silicon availability and salinity on metal adsorption in a common estuarine diatom

Journal of environmental Sciences 2025年第2期148卷 364-374页

作者： Fengyuan Chen Jie Ma Ke Pan SZU-HKUST Joint PhD Program in Marine Environmental Science Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Marine Microbiome Engineering Institute for Advanced StudyShenzhen UniversityShenzhen 518060China Department of Ocean Science The Hong Kong University of Science and TechnologyHong Kong 999077China

Increasing nitrogen and phosphorus discharge and decreasing sediment input have made silicon(Si)a limiting element for diatoms in *** in nutrient structure and salinity fluctuation can greatly affect metal uptake by estuarine ***,the combined effects of Si and salinity on metal accumulation in these diatoms have not been *** this study,we aimed to investigate how salinity and Si availability combine to influence the adsorption of metals by a widely distributed diatom Phaeodactylum *** data indicate that replete Si and low salinity in seawater can enhance cadmium and copper adsorption onto the diatom *** the single-cell level,surface potential was a dominant factor determining metal adsorption,while surface roughness also contributed to the highermetal loading capacity at lower *** a combination of noninvasive micro-test technology,atomic force microscopy,X-ray photoelectron spectroscopy,and Fourier transform infrared spectroscopy,we demonstrate that the diversity and abundance of the functional groups embedded in diatom cell walls vary with salinity and Si *** results in a change in the cell surface potential and transient metal *** study provides novel mechanisms to explain the highly variable metal adsorption capacity of a model estuarine diatom.

关键词： Diatom Metal adsorption Silicon Salinity Functional group Surface potential

来源：评论

学校读者我要写书评

暂无评论

Clinical Biomarkers to Evaluate Next Generation Inhaled Tobacco Products’ Effect in the Oral Cavity: a Narrative Review

引用

Current Oral Health Reports 2024年第1期11卷 30-39页

作者： Sarles, S. Emma Hensel, Edward C. Rahman, Irfan Robinson, Risa J. Biomedical and Chemical Engineering PhD Program Rochester Institute of Technology Rochester NY United States Department of Mechanical Engineering Respiratory Technologies Lab Rochester Institute of Technology Rochester NY United States Department of Environmental Medicine Rahman Lab University of Rochester Medical Center Rochester NY United States

Purpose of Review: Biomarkers in the oral cavity of users of next generation tobacco products, such as electronic cigarettes (EC), provide data about effects on oral and systemic health and help predict long-term health effects, such as cardiovascular, respiratory, and periodontal disease. Despite oral cavity health provides, translation of findings to regulatory outcomes around EC is lacking. A review of the current state of the art in use of clinical biomarkers of the oral cavity was conducted. This identified inconsistencies and gaps in tobacco regulatory science to address how to improve clinical studies for screening tobacco products and studying disease. Recent Findings: The review identified that saliva and buccal biopsies provide dependable biomarkers of oral and systemic health when several parameters of health are standardized and considered. Inflammatory cytokines in oral tissue and biofluids of EC users are conflicting due to differences in sample collection and analysis techniques. Salivary C-reactive protein levels provide information about systemic inflammation and risk of cardiovascular disease, but analysis of this biomarker in the oral cavity does not appear in the current literature. The oral microbiome plays a significant role in human health and may be a useful tool to study systemic effects of tobacco products non-invasively, yet inconsistencies in reporting metrics make studies difficult to compare or translate into tangible outcomes. Effects of tobacco product use on hard dental tissue are not widely investigated despite correlations observed between e-cigarette use and broken teeth. Summary: This review provides a comprehensive update on clinical biomarkers in systemic and oral diseases associated with emerging nicotine products. © 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Biomarkers Electronic cigarette Oral health Tobacco regulatory science Vaping

来源：评论

学校读者我要写书评

暂无评论

Genomic and transcriptomic dissection of Theionarchaea in marine ecosystem

引用

Science China(Life Sciences) 2022年第6期65卷 1222-1234页

作者： Mingwei Cai Changhai Duan Xinxu Zhang Jie Pan Yang Liu Cuijing Zhang Meng Li Archaeal Biology Center Shenzhen Key Laboratory of Marine Microbiome EngineeringInstitute for Advanced StudyShenzhen UniversityShenzhen 518060China SZU-HKUST Joint PhD Program in Marine Environmental Science Shenzhen UniversityShenzhen 518060China

Theionarchaea is a recently described archaeal class within the *** it is widely distributed in sediment ecosystems,little is known about its metabolic potential and ecological ***,we used metagenomics and metatranscriptomics to characterize 12 theionarchaeal metagenome-assembled genomes,which were further divided into two subgroups,from coastal mangrove sediments of China and seawater columns of the Yap *** analysis revealed that apart from the canonical sulfhydrogenase,Theionarchaea harbor genes encoding heliorhodopsin,group 4[NiFe]-hydrogenase,and flagellin,in which genes for heliorhodopsin and group 4[NiFe]-hydrogenase were transcribed in mangrove ***,the theionarchaeal substrate spectrum may be broader than previously reported as revealed by metagenomics and metatranscriptomics,and the potential carbon substrates include detrital proteins,hemicellulose,ethanol,and CO_(2).The genes for organic substrate metabolism(mainly detrital protein and amino acid metabolism genes)have relatively higher transcripts in the top sediment layers in mangrove *** addition,co-occurrence analysis suggested that the degradation of these organic compounds by Theionarchaea might be processed in syntrophy with fermenters(e.g.,Chloroflexi)and ***,these observations expand the current knowledge of the metabolic potential of Theionarchaea,and shed light on the metabolic strategies and roles of these archaea in the marine ecosystems.

关键词： Theionarchaea metagenome metatranscriptome metabolic potentials ecological roles

来源：评论

学校读者我要写书评

暂无评论

The Scalability of Third Generation Photovoltaics: Deposition Techniques and Modularity

The Scalability of Third Generation Photovoltaics: Depositio...

引用

2023 Sharjah International Conference on Physics of Advanced Materials, SICPAM 2023

作者： Ayoub, Mohamad Alashkar, Adnan Mdallal, Ayman Ibrahim, Taleb Khamis, Mustafa Alami, Abdul Hai Sustainable and Renewable Energy Engineering Department University of Sharjah Sharjah27272 United Arab Emirates PhD Program in Materials Science and Engineering American University of Sharjah Sharjah26666 United Arab Emirates Department of Chemical Engineering American University of Sharjah Sharjah26666 United Arab Emirates Department of Biology Chemistry and Environmental Sciences College of Arts and Sciences American University of Sharjah Sharjah26666 United Arab Emirates Center for Advanced Materials Research Research Institute of Science and Engineering University of Sharjah Sharjah27272 United Arab Emirates

The development of third-generation photovoltaic (TGPV) technologies promises to address some of the limitations of conventional silicon-based solar cells. However, the scalability of these technologies is a critical factor in their practical application. TGPV include Perovskite Solar Cells (PSC), Organic Solar Cells (OSC), and Dye-Sensitized Solar Cell (DSSC). This paper reviews and summarizes the recent trends and research on the deposition techniques and modularity of TGPV. Various deposition techniques such as slot-die coating, thermal evaporation, and spray pyrolysis are discussed, along with their advantages and limitations. Modularity, which allows for the integration of TGPV cells into different structures, is also examined as a critical factor in scalability. The paper concludes that the scalability of TGPV technologies depends on the development of efficient and cost-effective deposition techniques and modularity, which will facilitate the integration of the TGPV cells into various structures and enable the widespread use of these promising technologies. © Published under licence by IOP Publishing Ltd.

关键词： Perovskite solar cells

来源：评论

学校读者我要写书评

暂无评论

DEEP SOUTH URBAN AMBIENT PARTICULATE MATTER INDUCES CYTOTOXIC AND INFLAMMATORY RESPONSES IN A549 CELLS

Biomedical Sciences Instrumentation

引用

Biomedical Sciences Instrumentation 2024年第2期60卷 188-201页

作者： Pacurari, M. Cox, I. Kafoury, R. Komolafe, K. Kodedoye, O. Farah, I. Department of Biology College of Science Engineering and Technology Jackson State University JacksonMS39217 United States Environmental Science PhD Program College of Science Engineering and Technology Jackson State University JacksonMS39217 United States RCMI Center for Environmental Health College of Science Engineering and Technology Jackson State University JacksonMS39217 United States

Exposure to ambient air pollution component particulate matter (PM) in urban environments has been associated with adverse health effects to the exposed population. This study aimed to investigate the cytotoxic and inflammatory responses of lung A549 cells to ambient particulate matter (PM) extracts (EE) collected from a geographical site in south of city limits of Jackson, Mississippi. PM was collected from the site, extracted, and characterized for chemical composition and microscopic analysis using SEM. Following characterization, the EE was used to treat A549 cells, and various cellular responses were assessed. Our SEM analysis of EE indicated the presence of micrometer-sized particles, and elemental analysis indicated the presence of elements such as C, Si, Fe, S, N, P, and Ca. Cell viability decreased in a dose- and timedependent manner following exposure to EE. Inflammatory gene IL-1β, chemokine CCL-18 and MIP-1, and transcription factor NF-кB were upregulated by EE. EE also increased the level of ROS and mitochondria. In conclusion, our data indicates that EE is cytotoxic, inflammatory, and an oxidant to lung cells Also, the findings of the present study highlight the potential health risks associated with exposure to air pollution and inflammatory lung disease. © 2024 IAE All rights reserved.

关键词： Lung cancer

来源：评论

学校读者我要写书评

暂无评论

MiR-1 Is Regulated by Hydrogen Peroxide via MAPK and Limits Cell Migration and Invasion

引用

environmental Toxicology 2025年 2025 May 16页

作者： Pacurari, Maricica Cox, Irmanecia Farah, Ibrahim Department of Biology College of Science Engineering and Technology Jackson State University JacksonMS United States RCMI Center for Environmental Health College of Science Engineering and Technology Jackson State University JacksonMS United States Environmental Science PhD Program College of Science Engineering and Technology Jackson State University JacksonMS United States

MicroRNA-1 (miR-1) is a conserved microRNA that is highly expressed in skeletal and cardiac muscle tissues. Moreover, miR-1 regulates genes and has critical roles in cell migration and invasion. Downregulation of miR-1 has been found in many pathologies of numerous organs, including the lungs. What exactly contributes to the downregulation of miR-1 is not fully understood, and in the present study, we investigated whether ROS regulate miR-1 and its role in cell migration and invasion. A549 cells were grown and maintained in DMEM:F12 (1:1) and supplemented with 10% FBS and 1000 U of Penicillin/Streptomycin and maintained as recommended by the manufacturer (ATCC). Cell migration and invasion, IHC, Western blot, qPCR, ROS, miR-1 transfection, and qPCR were used to determine miR-1 regulation and its role in cell migration. Exogenous miR-1 decreased the formation of ROS and inhibited cell migration and invasion, whereas inhibition of miR-1 increased ROS formation and stimulated cell migration and invasion. Inhibition of miR-1 induced the formation of actin filaments contractile structures, whereas exogenous miR-1 limited the formation of these structures. Hydrogen peroxide significantly decreased miR-1 level, whereas inhibition of Nox4 had no effect on miR-1 level. Alpha amanitin did not decrease miR-1 level, whereas inhibition of NF-кB temporally decreased miR-1 level. This study demonstrates that ROS suppress miR-1 and that miR-1 is posttranscriptionally regulated via MAPK. Endogenous Nox4-dependent ROS are not involved in miR-1 regulation, whereas exogenous ROS regulates miR-1. NF-κB plays a key role in miR-1 regulation in both redox and nonredox environments. Moreover, Mir-1 limits cell migration and invasion even in the presence of ROS. TSP-1 is a major regulator of TGFβ and its expression is upregulated by ROS. Our work indicates ROS is a major regulator of miR-1 and TSP-1 and could be a potential therapeutic target to limit ROS- and non-ROS-mediated processes in l

关键词： Redox reactions

来源：评论

学校读者我要写书评

暂无评论

Effects of ambient silicic acid concentration on the physiology of marine cyanobacterial Synechococcus

引用

Marine environmental Research 2025年 209卷 107220页

作者： Ou, Qiang Xu, Huo Zhang, Zhen Ma, Jie Pan, Ke Shenzhen Key Laboratory of Marine Microbiome Engineering Institute for Advanced Study Shenzhen University Shenzhen China SZU-HKUST Joint PhD Program in Marine Environmental Science Shenzhen University Shenzhen China Department of Ocean Science The Hong Kong University of Science and Technology Hong Kong

The marine cyanobacterium Synechococcus can accumulate significant amounts of silicon (Si) within its cells, potentially contributing to the vertical transport of biogenic Si in the ocean. This has prompted interest in understanding the uptake, subcellular distribution, and chemical forms of Si in Synechococcus. The surprisingly high intracellular Si concentration could have important impacts on Synechococcus physiology, but these effects have been relatively unexplored. In this study, we investigated the effects of external Si concentrations, [Si(OH)4], on the cell physiology of two strains of Synechococcus (CC9311 and WH7803). Increased ambient [Si(OH)4] significantly enhanced total cellular and water-soluble Si content in Synechococcus, but had little effect on their growth. However, the cell size, volume and photosynthetic performance were significantly reduced in strain WH7803, indicating some harmful effects in the cell. Increases in ambient [Si(OH)4] also altered the Derjaguin-Muller-Toporov (DMT) modulus, adhesion, surface potential and elemental composition of the Synechococcus cells. Notably, significant changes in area-specific adsorbed metals and volume-specific metal content were observed at higher [Si(OH)4] levels, suggesting Si availability in seawater could markedly impact the interactions between Synechococcus cell and environment. Overall, this study provides new insights into the physiological adaptations of marine cyanobacterium Synechococcus to varying environmental silicic acid concentrations. © 2025 Elsevier Ltd

关键词： Psychophysiology

来源：评论

学校读者我要写书评

暂无评论

Mississippi Burning: An Exploration of Community Noise Levels from a Rural Mississippi Community Grappling with Wood Pellet Production Manufacturing

SSRN

引用

SSRN 2024年

作者： Walker, Erica D. Franzen Lee, Nina Nica, C. Barnes, A. Graham, Barbara Martin, K. Community Noise Lab Department of Epidemiology Brown University School of Public Health ProvidenceRI02903 United States Environmental Science PhD Program College of Science Engineering and Technology Jackson State University JacksonMS39217 United States Greater Greener Gloster Project GlosterMS39638 United States

Wood pellets are being touted as a renewable and sustainable form of energy. As a result of this growing popularity, the global wood pellet market is expected to reach $16 billion by 2026. Currently, there are approximately 100 pellet manufacturing plants in the United States, with most of the production occurring in predominantly Black and poor communities in the rural South. At the request of residents concerned about the noise pollution emanating from wood pellet production plants in their community, we carried out a community noise exposure assessment. From August 2023 to March 2024, and working closely with a local community organization we measured a variety of noise metrics in Gloster, a wood pellet impacted city in rural Mississippi, comparing these noise pollution levels to a background community with no wood pellet industrial activity. We observed statistically significant higher levels of A-weighted, C-weighted, and Z-weighted sound in Gloster compared to Mendenhall. These differences persisted across different times of the day and days of the week. When examining the decibel levels for each of the center frequencies of the 1:3 octave band, this pattern persisted. Our preliminary findings suggest that a rural community’s soundscape can be negatively impacted by unchecked wood pellet manufacturing. We argue that the sound level differences in communities impacted by wood pellet manufacturing and those that are not, combined with the strategic placement of wood pellet plants in vulnerable communities in the rural south, may also be an environmental justice issue. © 2024, The Authors. All rights reserved.

关键词： Pelletizing

来源：评论

学校读者我要写书评

暂无评论

Desalination Alternative Technology in Conjunction with Membrane Capacitive Deionization (MCDI): A Literature Review Article

引用

Journal of environmental Protection 2021年第3期12卷 218-236页

作者： Ahmed J. Aldalou Yunes K. Mogheir Water Technology PhD Program Islamic University of Gaza & AL-Azhar University Gaza Palestine Civil and Environmental Engineering Department Islamic University of Gaza Gaza Palestine

Water and energy shortages came due to rapid population growth, living standards and rapid development in the agriculture and industrial sectors. Desalination tends to be one of the most promising water solutions;however, it is a process of intense energy. Membrane Capacitive Deionization (MCDI) has received considerable interest as a promising desalination technology, and MCDI research has increased significantly over the last 10 years. In addition, there are no guidelines for the design of Capacitive Deionization (CDI) implementation strategies for individual applications. This study, therefore;provides an alternative of CDI’s recent application developments, with emphasis placed on hybrid systems to address the technological needs of different relevant fields. The MCDI’s energy consumption is compared with the reverse osmosis literature data based on experimental data from laboratory-scale system. The study demonstrates that MCDI technology is a promising technology in the next few years with an extreme competition in water recovery, energy consumption and salt removal for reverse osmosis.

关键词： Capacity Deionization Membrane Capacitive Deionization Desalination Reverse Osmosis (RO)

来源：评论

学校读者我要写书评

暂无评论

Amplifying concerns: An exploration of community noise levels in rural communities impacted by wood pellet production

引用

environmental Challenges 2024年 17卷

作者： Walker, E.D. Lee, N. Franzen Nica, C. Barnes, A. Graham, B. Martin, K. Community Noise Lab Department of Epidemiology Brown University School of Public Health Providence RI United States Environmental Science PhD Program College of Science Engineering and Technology Jackson State University Jackson MS United States Greater Greener Gloster Project Gloster MS United States

Wood pellets are increasingly promoted as a renewable and sustainable energy source, driving the global wood pellet market to a projected value of $16 billion by 2026. However, the rapid expansion of this industry disproportionately affects predominantly Black and low-income communities in the rural South, where approximately 100 pellet manufacturing plants are currently located in the United States. From August 2023 to March 2024, we conducted a noise exposure assessment in Gloster, Mississippi, a community affected by pellet production, and compared it to Mendenhall, a nearby community without industrial activity. In collaboration with a local organization, we measured noise metrics and found significantly higher A-weighted, C-weighted, and Z-weighted sound levels in Gloster, along with elevated decibels at multiple center frequencies. These findings suggest that wood pellet manufacturing can severely alter the soundscape of rural communities, raising environmental justice concerns. Our findings underscore the importance of investigating the cumulative health impacts of noise and other environmental burdens on these vulnerable communities to better inform policy. © 2024

关键词： Community noise environmental justice Low-frequency noise Mississippi Rural Wood biomass Wood pellet production

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：