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X-ray absorption spectroscopy studies for the determination of adsorption binding modes of selenium oxoanions onto iron and manganese based nanomaterials

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MRS Online Proceedings Library 2013年第1期1480卷 13-24页

作者： Gonzalez, Christina M. Parsons, Jason G. Hernandez, Jeffrey Gardea-Torresdey, Jorge L. Department of Chemistry The University of Texas at El Paso El Paso United States Department of Chemistry The University of Texas-Pan American Edinburg United States Environmental Science and Engineering PhD program The University of Texas at El Paso El Paso United States

Increasing concentrations of selenium oxoanions in the environment are placing many animals at risk for reproduction failure and deformities. The understanding of binding mechanisms of selenium oxoanions to iron and manganese based oxide minerals could lead to enhanced understanding of selenium mobility in the environment. In this study, the binding mechanisms of selenium oxoanions, selenite and selenate, to non microwave-assisted and microwave-assisted synthetic Fe3O4, Mn3O4, and MnFe2O4 nanomaterials were investigated through the use of X-ray absorption spectroscopy. The X-ray absorption near-edge structure (XANES) spectroscopy studies revealed the oxidation state of selenite and selenate remains the same after binding occurs to all nanomaterials in pH 2, 4, or 6 environments. The binding modes of selenite and selenate were determined to be bidentate binuclear through use of Extended x-ray absorption fine structure (EXAFS) and were independent of nanomaterials, synthetic technique, and pH.

关键词： Se nanostructure adsorption

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随机扩增多态性DNA技术研究发现二氧化钛纳米颗粒对西葫芦具有基因毒性(英文)

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Journal of Zhejiang University-science A(Applied Physics & Engineering) 2014年第8期15卷 618-623页

作者： Fabiola MORENO-OLIVAS Vincent U.GANT Jr. Kyle L.JOHNSON Jose R.PERALTA-VIDEA Jorge L.GARDEA-TORRESDEY Depertment of Chemistry The University of Texas at El Paso El Paso TX 79968 USA University of California Center for Environmental Implications of Nanotechnology (UC CEIN) The University of Texas at El Paso El Paso TX 79968 USA Department of Biological Sciences and Border Biomedical Research Center The University of Texas at El Paso El Paso TX 79968 USA Environmental Science and Engineering PhD Program The University of Texas at El Paso El Paso TX 79968 USA

研究目的:二氧化钛(TiO2)纳米颗粒已经广泛应用于化妆品、防晒霜、涂料和牙膏等。这些纳米颗粒性质非常稳定,能在废水和生物固体中转移和分散。现有研究表明,TiO2纳米颗粒对动物正常生理活动具有毒性等负面作用。但是,它们对植物是否具... 详细信息

研究目的:二氧化钛(TiO2)纳米颗粒已经广泛应用于化妆品、防晒霜、涂料和牙膏等。这些纳米颗粒性质非常稳定,能在废水和生物固体中转移和分散。现有研究表明,TiO2纳米颗粒对动物正常生理活动具有毒性等负面作用。但是,它们对植物是否具有毒性特别是是否会产生植物基因毒性至今尚不清楚。因此,本文使用随机扩增多态性DNA技术研究TiO2纳米颗粒是否对西葫芦具有基因毒性,为TiO2纳米颗粒排放进入环境后的潜在植物毒性风险评价提供依据。创新要点:首次发现了TiO2纳米颗粒对西葫芦具有基因毒性。重要结论:采用随机扩增多态性DNA技术,发现TiO2纳米颗粒污染处理的西葫芦样品与未处理样品的基因组DNA图谱相比,不仅在谱带强度有明显差异,而且存在谱带消失和新谱带产生现象,表明TiO2纳米颗粒对西葫芦具有基因毒性。

关键词：随机扩增多态性DNA技术 TiO2 纳米颗粒基因组DNA 西葫芦毒性

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Mining GIS data to predict urban sprawl

arXiv

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arXiv 2021年

作者： Pampoore-Thampi, Anita Varde, Aparna S. Yu, Danlin Department of Computer Science Montclair State University MontclairNJ United States Department of Earth and Environmental Studies Montclair State University MontclairNJ United States Environmental Management PhD Program Montclair State University MontclairNJ United States

This paper addresses the interesting problem of processing and analyzing data in geographic information systems (GIS) to achieve a clear perspective on urban sprawl. The term "urban sprawl" refers to overgrowth and expansion of low-density areas with issues such as car dependency and segregation between residential versus commercial use. Sprawl has impacts on the environment and public health. In our work, spatiotemporal features related to real GIS data on urban sprawl such as population growth and demographics are mined to discover knowledge for decision support. We adapt data mining algorithms, Apriori for association rule mining and J4.8 for decision tree classification to geospatial analysis, deploying the ArcGIS tool for mapping. Knowledge discovered by mining this spatiotemporal data is used to implement a prototype spatial decision support system (SDSS). This SDSS predicts whether "urban sprawl" is likely to occur. Further, it estimates the values of pertinent variables to understand how the variables impact each other. The SDSS can help decision-makers identify problems and create solutions for avoiding future sprawl occurrence and conducting urban planning where sprawl already occurs, thus aiding sustainable development. This work falls in the broad realm of geospatial intelligence and sets the stage for designing a large scale SDSS to process big data in complex environments, which constitutes part of our future work. © 2021, CC BY-SA.

关键词： Association rules

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Direct Detection of Adenovirus in environmental Waste Waters by Portable Optical Fiber Sensor Platform

Direct Detection of Adenovirus in Environmental Waste Waters...

引用

IEEE Sensors

作者： Nimet Yildirim Dan Li Feng Long April Z. Gu Bioengineering PhD Program Northeastern University Boston US State Key Joint Laboratory of Environment Simulation and Pollution Control Environmental Science and Engineering Tsinghua University Beijing China Department of Environment Science and Engineering Tsinghua University Beijing China Department of Civil and Environmental Engineering Northeastern University Boston US

ISBN: (纸本)9781467346412

Reusable and portable evanescent wave biosensor for rapid, sensitive and highly selective direct detection of adenoviruses was developed. Here, specific antibody for the hexon protein of the virus was used as a recognition element. Linear detection range was determined from 100PFU/ml to 2000PFU/ml. This direct detection system can be regenerated successfully with over 5 times without significant deterioration of the sensor performance. The developed biosensor system has high specificity towards adenovirus, and it was applied to environmental waste water samples for the detection of adenovirus with 95 to 117% recovery and 1.1 to 8.1% cv values (n=2).

关键词： ADENOVIRUS DETECTION DIRECT

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X-ray absorption spectroscopy studies for the determination of adsorption binding modes of selenium oxoanions onto iron and manganese based nanomaterials 21

X-ray absorption spectroscopy studies for the determination ...

引用

21st International Materials Research Congress, IMRC 2012

作者： Gonzalez, Christina M. Parsons, Jason G. Hernandez, Jeffrey Gardea-Torresdey, Jorge L. Department of Chemistry University of Texas at El Paso 500 W University Ave. El PasoTX79968 United States Environmental Science and Engineering PhD program University of Texas at El Paso 500 W University Ave. El PasoTX79968 United States Department of Chemistry University of Texas-Pan American 1201 W University Drive EdinburgTX78534 United States

ISBN: (纸本)9781510804845

Increasing concentrations of selenium oxoanions in the environment are placing many animals at risk for reproduction failure and deformities. The understanding of binding mechanisms of selenium oxoanions to iron and manganese based oxide minerals could lead to enhanced understanding of selenium mobility in the environment. In this study, the binding mechanisms of selenium oxoanions, selenite and selenate, to non microwave-assisted and microwave-assisted synthetic Fe3O4, Mn3O4. and MnFe2O4 nanomaterials were investigated through the use of X-ray absorption spectroscopy. The X-ray absorption near-edge structure (XANES) spectroscopy studies revealed the oxidation state of selenite and selenate remains the same after binding occurs to all nanomaterials in pH 2, 4, or 6 environments. The binding modes of selenite and selenate were determined to be bidentate binuclear through use of Extended x-ray absorption fine structure (EXAFS) and were independent of nanomaterials, synthetic technique, and pH. © 2012 Materials Research Society.

关键词： Magnetite

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Hybrid CNN-LSTM and Domain Modeling in Climate-Energy Analysis for a Smart Environment

Hybrid CNN-LSTM and Domain Modeling in Climate-Energy Analys...

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International Conference on Tools for Artificial Intelligence (ICTAI)

作者： Sarahana Shrestha Brian Buckley Aparna S. Varde Daniel Cwynar Environmental Science & Mangement PhD Program Montclair State University Montclair NJ USA Clean Energy & Sustainability Analytics Center Montclair State University Montclair NJ USA School of Computing Montclair State University Montclair NJ USA

This study aims to model the effect of local climate on energy generation in power plants in the United States. It considers climate change as well as the ever-growing electricity demand, contributing to greenhouse gas emissions. We propose an integration of AI-based and domain-specific paradigms via a hybrid approach of convolutional neural networks (CNN) & long short-term memory (LSTM) coupled with environmental models. Erstwhile studies focus mainly on specific energy sources, e.g. solar/wind power. There is a need for more comprehensive examination, e.g. temperature effects across various energy generation types at the macro level of states and micro level of power plants. This forms the major focus and novelty of our study. Fathoming the factors driving temperature-energy correlations, and assessing power plant vulnerability to changing climate patterns, are both essential to promote energy infrastructure resilience and sustainability. Our study offers novel insights into the complex interplay of temperature, energy generation, sustainability and related aspects to enable enhanced macro & micro level decision-making in energy sector. It therefore makes contributions to smart environment goals for smart cities and a smart planet.

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Factors affecting fate and transport of engineered nanomaterials in terrestrial environments

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Current Opinion in environmental science and Health 2018年 6卷 47-53页

作者： Rawat, Swati Pullagurala, Venkata L.R. Adisa, Ishaq O. Wang, Yi Peralta-Videa, Jose R. Gardea-Torresdey, Jorge L. Environmental Science and Engineering PhD Program The University of Texas at El Paso 500 West Univ. Ave. El Paso 79968 TX United States Department of Chemistry and Biochemistry The University of Texas at El Paso 500 West Univ. Ave. El Paso 79968 TX United States University of California Center for Environmental Implications of Nanotechnology (UC CEIN) The University of Texas at El Paso 500 West Univ. Ave. El Paso 79968 TX United States Centre for Nanoscale Elements Suppress Plant Disease Enhance Macronutrient Use Efficiency and Increase Crop Yield United States

The unique physico-chemical, electronic, redox, and UV-absorption properties of the engineered nano-particles (ENPs) make them suitable for many industrial applications including consumer goods. Agriculture is a major area where nanotechnologies are applied. Therefore, soil/sediment becomes an important environmental sink for ENP waste disposal. Hence, the fate and transport of ENPs in soil is of particular interest to the scientific community. This short review summarizes the recent findings of studies dealing with the related fundamental concepts. It touches upon the physico-chemical properties of soil and those of ENPs, the soil and solution chemistries, the environmental factors, and the influence of other chemical moieties as possible factors affecting the fate of ENPs in soil. © 2018 Elsevier B.V.

关键词： Colloidal chemistry Deposition Engineered nano particles Organic matter Soil chemistry Transport

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The Scalability of Third Generation Photovoltaics: Deposition Techniques and Modularity

The Scalability of Third Generation Photovoltaics: Depositio...

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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

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Nanomaterials in agricultural production: Benefits and possible threats?

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ACS Symposium Series 2013年 1124卷 73-90页

作者： Hong, Jie Peralta-Videa, Jose R. Gardea-Torresdey, Jorge L. Environmental Science and Engineering PhD Program University of Texas at El Paso 500 West University Ave. El Paso TX 79968 United States Chemistry Department University of Texas at El Paso 500 West University Ave. El Paso TX 79968 United States

ISBN: (纸本)9780841227842

Food and agricultural production are among the most sensitive fields of application of nanotechnology. It is predicted that nanotechnology will revolutionize agriculture through new tools for disease treatment and detection, smart delivery systems, sensors, and better management devices. However, the rapid development of nanotechnology could release a huge amount of engineered nanoparticles, which may cause adverse effects on edible plants. In this review article the authors analyzed the most recent literature on the application of nanotechnology in agriculture, including nanofertilizers, nanosensors, crop protection, pollution control, waste management, and pesticide detection. The negative effects caused by nanoparticles on edible plants are also discussed. © 2013 American Chemical Society.

关键词： Nanoparticles

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Hepatitis B surface antigen loss in chronic hepatitis B patients with low-viral-load

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Journal of Gastroenterology and Hepatology (Australia) 2024年第11期39卷 2327-2331页

作者： Jang, Tyng-Yuan Batsaikhan, Batbold Chen, Yo-Chia Dai, Chia-Yen PhD Program of Environmental and Occupational Medicine and Graduate Institute of Clinical Medicine Kaohsiung Medical University Kaohsiung Taiwan Department of Internal Medicine Kaohsiung Medical University Hospital Kaohsiung Medical University Kaohsiung Taiwan Department of Internal Medicine Pingtung Hospital Ministry of Health and Welfare Ping-Tung Taiwan Department of Internal Medicine Institute of Medical Sciences Mongolian National University of Medical Sciences Ulaanbaatar Mongolia Department of Biological Science and Technology National Pingtung University of Science and Technology Pingtung Taiwan College of Professional Studies National Pingtung University of Science and Technology Pingtung Taiwan Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung Taiwan

Background and Aim: Among low viral load (DNA of hepatitis B virus (HBV) was 10 IU/mL vs 2.3 log10 IU/mL;P = 0.003), and higher proportion of prior NAs-treated history. Logistic regression analysis revealed ... 详细信息

Background and Aim: Among low viral load (DNA of hepatitis B virus (HBV) was < 2000 IU/mL), the factor of the loss of hepatitis B surface antigen (HBsAg) remained elusive. Methods: The retrospective study recruited patients with chronic hepatitis B (CHB) who were negative low for hepatitis B e-antigen (HBeAg), had a low viral load, and experienced HBsAg loss during follow-up. CHB patients with low-viral load but without consequent HBsAg loss were also enrolled at the ratio of 1:4. The factors contributing to HBsAg loss were analyzed. Results: A total of 80 patients were recruited for the current study, with a mean age of 63.9 years and 61.3% being male. Among them, 62.5% patients (50/80) were treated with potent nucleoside/nucleotide analogues (NAs) during the follow-up period. Additionally, 12.5% patients (10/80) had a prior history of NAs treatment before enrolment. During the follow-up, HBsAg loss occurred in 17 patients (21.3%). Compared with patients without HBsAg loss, those with HBsAg loss were younger (57.9 years vs 65.5 years;P = 0.01), had lower HBV DNA levels (1.3 log₁₀ IU/mL vs 2.3 log₁₀ IU/mL;P = 0.003), and higher proportion of prior NAs-treated history. Logistic regression analysis revealed that the factors associated with factors associated with HBsAg loss were age < 60 years (OR/CI: 3.95/1.15–13.60, P = 0.03), prior NAs-treated history (OR/CI: 7.59/1.42–40.51, P = 0.01) and current NAs-treated (OR/CI: 0.19/0.05–0.71, P = 0.01). Conclusions: In the study, older age and prior NAs were positively associated with HBsAg loss, and current NAs was negatively associated with HBsAg loss. Additionally, some patients experienced HBsAg loss during the NAs therapy. © 2024 Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.

关键词： HBeAg HBsAg HBV NAs viral load

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