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Enhanced removal of viral aerosols using nanosilver/TiO2-chitosan filters combined with a negative air ionizer

Journal of environmental Chemical Engineering 2024年第3期12卷

作者： dlamini, Wonder Nathi Yao, Ting-Ching Lee, Hsin-Jui Berekute, Abiyu Kerebo Sallah-Ud-din, Rasham Siregar, Sepridawati Yu, Kuo-Pin Institute of Environmental and Occupational Health Sciences National Yang-Ming Chiao-Tung University Taipei Taiwan Department of International Ph.D. Program in Environmental Sciences and Technology University System of Taiwan Taipei Taiwan Department of Chemistry College of Natural and Computational Sciences Arba Minch University Arbaminch Ethiopia Faculty of Mineral Technology AKPRIND Institute of Science & Technology Yogyakarta Indonesia

The presence of airborne viruses in bioaerosols is a significant and ongoing public health concern. In this context, this study aimed to develop a new filter that integrates nanosilver into a TiO2-chitosan matrix (nano-Ag/TiO2-CS) to inactivate the non-enveloped bacteriophage MS2 as a viral aerosol surrogate. The materials were characterized using various techniques, such as X-ray diffraction (XRd), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), and X-ray photoelectron spectroscopy (XPS). The SEM images showed that the nano-Ag particles were spheres with a high surface area for virus interactions and that the fiber surfaces were covered by nano-Ag, which enhanced contact with viruses. The optimal 5 wt% nano-Ag/TiO2-CS filter combined with a negative air ionizer (NAI) showed the highest viral aerosol removal efficiency, which reached 97 %. The use of an NAI during filtration enhanced the inactivation of the viral aerosols. A long-term antiviral efficacy assessment showed that the nano-Ag/TiO2-CS filter demonstrated robust durability, which is vital for real-world applications. The nanofilter proposed in this work is simple, safe, and cost-effective for inactivating viral aerosols to improve indoor air quality. © 2024 Elsevier Ltd

关键词： Aerosols

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Atrophy of the cholinergic regions advances from early to late mild cognitive impairment

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Neuroradiology 2024年第4期66卷 543-556页

作者： Lai, Ying-Liang Larry Hsu, Fei-Ting Yeh, Shu-Yi Kuo, Yu-Tzu Lin, Hui-Hsien Lin, Yi-Chun Kuo, Li-Wei Chen, Cheng-Yu Liu, Hua-Shan Ph.D. Program in Medical Neuroscience College of Medical Science and Technology Taipei Medical University and National Health Research Institutes Taipei Taiwan Department of Biological Science and Technology China Medical University Taichung Taiwan School of Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei Taiwan CT/MR Division Rotary Trading CO. LTD Taipei Taiwan Institute of Biomedical Engineering and Nanomedicine National Health Research Institutes Miaoli Taiwan Institute of Medical Device and Imaging National Taiwan University College of Medicine Taipei Taiwan Department of Radiology School of Medicine College of Medicine Taipei Medical University Taipei Taiwan Department of Medical Imaging Taipei Medical University Hospital Medical University Taipei Taiwan International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei Taiwan

Purpose: We investigated the volumetric changes in the components of the cholinergic pathway for patients with early mild cognitive impairment (EMCI) and those with late mild cognitive impairment (LMCI). The effect of patients’ apolipoprotein 4 (APOE-ε4) allele status on the structural changes were analyzed. Methods: Structural magnetic resonance imaging data were collected. Patients’ demographic information, plasma data, and validated global cognitive composite scores were included. Relevant features were extracted for constructing machine learning models to differentiate between EMCI (n = 312) and LMCI (n = 541) and predict patients’ neurocognitive function. The data were analyzed primarily through one-way analysis of variance and two-way analysis of covariance. Results: Considerable differences were observed in cholinergic structural changes between patients with EMCI and LMCI. Cholinergic atrophy was more prominent in the LMCI cohort than in the EMCI cohort (P < 0.05 family-wise error corrected). APOE-ε4 differentially affected cholinergic atrophy in the LMCI and EMCI cohorts. For LMCI cohort, APOE-ε4 carriers exhibited increased brain atrophy (left amygdala: P = 0.001;right amygdala: P = 0.006, and right Ch123, P = 0.032). EMCI and LCMI patients showed distinctive associations of gray matter volumes in cholinergic regions with executive (R² = 0.063 and 0.030 for EMCI and LMCI, respectively) and language (R² = 0.095 and 0.042 for EMCI and LMCI, respectively) function. Conclusions: Our data confirmed significant cholinergic atrophy differences between early and late stages of mild cognitive impairment. The impact of the APOE-ε4 allele on cholinergic atrophy varied between the LMCI and EMCI groups. © 2024, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： APOE-ε4 allele cholinergic pathway Early mild cognitive impairment (EMCI) mild cognitive impairment (MCI) nucleus basalis of Meynert

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RepE: unsupervised representation learning for image enhancement in nonlinear optical microscopy

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Optics Letters 2023年第16期48卷 4245-4248页

作者： Jhang, Yun-Jie Lin, Xin Chia, Shih-Hsuan Chen, Wei-Chung Wu, I-Chen Wu, Ming-Tsang Zhuo, Guan-Yu Tai, Tsung-Ming Chen, Hung-Wen International Intercollegiate Ph.D. Program National Tsing Hua University Hsinchu30013 Taiwan Institute of Biophotonics National Yang Ming Chiao Tung University Taipei11221 Taiwan Ph.D. Program in Environmental and Occupational Medicine Kaohsiung Medical University Kaohsiung80708 Taiwan Department of Internal Medicine Kaohsiung Medical University Hospital Kaohsiung Medical University Kaohsiung80708 Taiwan Department of Public Health Kaohsiung Medical University Kaohsiung80708 Taiwan Department of Family Medicine Kaohsiung Medical University Hospital Kaohsiung80708 Taiwan Institute of Translational Medicine and New Drug Development China Medical University Taichung404333 Taiwan NVIDIA AI Technology Center NVIDIA Taiwan Institute of Photonics Technologies National Tsing Hua University Hsinchu30013 Taiwan

We present an unsupervised learning denoising method, RepE (representation and enhancement), designed for nonlinear optical microscopy images, such as second harmonic generation (SHG) and two-photon fluorescence (TPEF). Addressing the challenge of effectively denoising images with various noise types, RepE employs an encoder network to learn noise-free representations and a reconstruction network to generate denoised images. It offers several key advantages, including its ability to (i) operate without restrictive statistic assumptions, (ii) eliminate the need for clean-noisy pairs, and (iii) requires only a few training images. Comparative evaluations on real-world SHG and TPEF images from esophageal cancer tissue slides (ESCC) demonstrate that our method outperforms existing techniques in image quality metrics. The proposed method provides a practical, robust solution for denoising nonlinear optical microscopy images, and it has the potential to be extended to other nonlinear optical microscopy modalities. © 2023 Optica Publishing Group.

关键词： Image enhancement

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Characterization of Bacterial Strains Isolated from Wastewater Polluted Soil for Synthetic dye decolorization Attributes

Characterization of Bacterial Strains Isolated from Wastewat...

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2021 international Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2021

作者： Ahsan, Wazir Aitizaz Lin, Chitsan National Kaohsiung University of Science and Technology Ph.D. Program In College of Hydrosphere Kaohsiung Taiwan National Kaohsiung University of Science and Technology Department of Marine Environmental Engineering Kaohsiung Taiwan

ISBN: (纸本)9781665419512

Soil is a renewable and valuable medium for variety of life. In Pakistan, factory effluents and domestic wastewater is generally not recycled and it contaminates the agricultural soils adjacent to nearby drains. Five screened isolates were subjected to azo dye decolorization (Reactive Black, Red Reactive, Blue direct, Congo Red direct) in the presence of NaCl, at variable ph levels and at different carbon sources. Isolate Sr-7, Ss-2-1 showed best decolorization ability in terms of all the azo dyes studied. Similarly, isolates Sr-2-1/1 and Mr-1/1 exhibited maximum phosphate solubilization and IAA production potential. The screened isolates can be used as inoculants to increase crop productivity in problem soils and can also be applied in wastewater treatments processes. © 2021 IEEE.

关键词： Azo dyes

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Selective detection of explosive nitro-aromatic compounds using the 2d organic nanosheets (2dONs) synthesize via 2d click chemistry directed by ultrasonication

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Journal of Industrial and Engineering Chemistry 2024年 134卷 504-513页

作者： dabur, deepak Chiu, Yun Cheih Wu, Hui-Fen International Ph.D. Program for Science National Sun Yat-Sen University Kaohsiung80424 Taiwan Department of Chemistry National Sun Yat-Sen University Kaohsiung 70 Lien-Hai Road Kaohsiung80424 Taiwan Institute of Medical Science and Technology National Sun Yat-Sen University Kaohsiung80424 Taiwan School of Pharmacy College of Pharmacy Kaohsiung Medical University Kaohsiung80708 Taiwan Institute of Precision Medicine College of Medicine National Sun Yat-Sen University Kaohsiung80424 Taiwan School of Medicine College of Medicine National Sun Yat-Sen University Kaohsiung80424 Taiwan

Recent advancements in click chemistry have made it an effective method for quickly and easily assembling extremely stable nanomaterial assemblies onto surfaces. Therefore, a new class of fluorescent sensor utilizing two-dimensional organic nanosheets (2dONs) for the selective sensing of 2,4-dinitrophenylhydrazine (2,4-dNph) has been proposed by using the click chemistry directed by the probe ultrasonication method (CCdPS) which is driven by the π-π stacking interactions with the aid of dMF solvent. Prolonged human exposure to 2, 4-dNph has been associated with various detrimental health consequences, including skin conditions, liver issues, and disturbances to the central nervous and cardiovascular systems. Fluorescence titration tests with nanomolar scale limit of detection (LOd, 100 nM or 0.1 μM) and limit of quantification (LOQ, 0.4 μM) for 2,4-dNph showed fluorescence quenching reactions and excellent reversibility. Additionally, zeta potential and UV-absorption spectroscopy were used to validate the interaction and binding characteristics of 2d ONs with 2,4-dNph. In contrast to the widely reported ground-state charge transfer or FRET-based probes for nitroaromatics detection, the signal response for 2,4-dNph was achieved by a strong inner filter effect with the combination of FRET (IFE-FRET). © 2024 The Korean Society of Industrial and Engineering Chemistry

关键词： Probes

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A mini-review on plasticrusts: occurrence, current trends, potential threats, and recommendations for coastal sustainability

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environmental Monitoring and Assessment 2024年第2期196卷 1-14页

作者： Nguyen, Minh-Ky Rakib, Md. Refat Jahan Nguyen, Hoang-Lam Lin, Chitsan Malafaia, Guilherme Idris, Abubakr M. Faculty of Environment and Natural Resources Nong Lam University of Ho Chi Minh City Hamlet 6 Linh Trung Ward Thu Duc City Ho Chi Minh City700000 Viet Nam Ph.D. Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Fisheries and Marine Science Faculty of Science Noakhali Science and Technology University Sonapur Noakhali3814 Bangladesh Department of Civil Engineering McGill University Montreal Canada Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Post-Graduation Program in Ecology Conservation and Biodiversity Federal University of Uberlândia MG Uberlândia Brazil Post-Graduation Program in Biotechnology and Biodiversity Federal University of Goiás GO Goiânia Brazil Post-Graduation Program in Conservation of Cerrado Natural Resources Goiano Federal Institute GO Urutaí Brazil Department of Chemistry College of Science King Khalid University Abha62529 Saudi Arabia King Khalid University Abha62529 Saudi Arabia

Plasticrusts manifest as a coating on intertidal rocks due to environmental exposure. They refer to crushed plastic debris that blankets rocks found along intertidal shorelines. This study significantly contributes to a better understanding of the occurrence of these novel plastic formations, shedding light on their potential pathways of formation during the Anthropocene era. The research provides comprehensive insights into the composition, origins, challenges, and effective management strategies for removing coastal plastic litter. The findings of this investigation offer valuable evidence regarding the formation and impact of these recently discovered plastic items in coastal regions, prompting discussions about their formation processes and their effects on the marine ecosystem. Recognizing that these newly emerged plastic litter pose a considerable threat to the marine environment is crucial. With their emergence, we face an environmental challenge, especially concerning the health of coastal ecosystems. Plasticrusts, when degraded, can release microplastics (MPs) and nanoparticles (NPs) into the surrounding environment. These micro- and nano-sized plastic particles pose significant ecological risks as they persist in ecosystems, potentially harming wildlife and entering the food chain, causing widespread environmental contamination. Significantly, it outlines strategies to minimize the impact of this emerging plastic debris and its source. © 2024, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Ecosystems

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Marine macro-litter sources and ecological impact: a review

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environmental Chemistry Letters 2024年第3期22卷 1257-1273页

作者： Le, Van-Giang Nguyen, Hoang-Lam Nguyen, Minh-Ky Lin, Chitsan Hung, Nguyen T. Quang Khedulkar, Akhil P. Hue, Nguyen K. Trang, phung T. Thu Mungray, Arvind Kumar Nguyen, d. duc Central Institute for Natural Resources and Environmental Studies Vietnam National University Hanoi111000 Viet Nam Department of Civil Engineering McGill University MontrealQC Canada Faculty of Environment and Natural Resources Nong Lam University Hamlet 6 Linh Trung Ward Thu Duc City Ho Chi Minh City700000 Viet Nam Ph.D. Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Biomedical Engineering and Environmental Science National Tsing Hua University Hsinchu30013 Taiwan Environmental Research Center Institute of Hydrology and Meteorology Science and Climate Change Hanoi111000 Viet Nam Department of Chemical Engineering Sardar Vallabhbhai National Institute of Technology Gujarat Surat395007 India Department of Civil and Energy System Engineering Kyonggi University Suwon16227 Korea Republic of Institute of Applied and Sustainable Technology Nguyen Tat Thanh University Ho Chi Minh City700000 Viet Nam

Marine pollution by various debris is rising in the context of increasing urbanization, industrialization and worldwide trade. Here, we review marine macro-litter with focus on sources, abundance, distribution, and impact on aquatic wildlife, human health, and the economy. We observe that about 75–80% of marine litter originates from land-based sources, including poorly managed landfills and improper disposal. Macro-litter ingestion by marine life is of growing concern, in particular concerning the presence of plastics and associated pollutants, e.g., bisphenol A and phthalates, in fishes. These pollutants are accumulated and transferred to human via seafood. Marine plastic pollution induces a substantial rise of economic costs due to the decline of ecosystem services. Mitigation of marine plastic pollution should be done by following the ten Rs principles of refuse, rethink, reduce, re-use, repair, refurbish, remanufacture, repurpose, recycle, and recover. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

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Impacts of ship emissions and sea-land breeze on urban air quality using chemical characterization, source contribution and dispersion model simulation of PM2.5 at Asian seaport

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environmental Pollution 2024年 347卷

作者： Tseng, Yu-Lun Cheng, Wen-Hsi Yuan, Chung-Shin Lo, Kuo-Cheng Lin, Chitsan Lee, Chia-Wei Bagtasa, Gerry Institute of Environmental Engineering National Sun Yat-sen University ROC Kaohsiung City Taiwan Ph.D. Program in Maritime Science and Technology College of Maritime National Kaohsiung University of Science and Technology ROC Kaohsiung City Taiwan Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology ROC Kaohsiung City Taiwan Department of Safety Health and Environmental Engineering National Kaohsiung University of Science and Technology ROC Kaohsiung City Taiwan Institute of Environmental Science and Meteorology University of the Philippines at Diliman Quezon City Philippines

Fine particulate matter (PM2.5) emitted from marine transportation, bulk materials handling at the docks, and dust dispersion has garnered increased attention, particularly in the interface between port and urban areas. This study explored the inter-transport of PM2.5 between Kaohsiung Harbor and neighboring Metro Kaohsiung. Chemical analyses of PM2.5 samples from four sites include water-soluble ions, metallic elements, carbons, anhydrosugars, and organic acids to establish PM2.5's chemical fingerprints. The CALPUFF air dispersion model is employed to simulate the spatiotemporal distribution of PM2.5 in Kaohsiung Harbor and adjacent urban areas. A clear seasonal and diurnal variation of PM2.5 concentrations and chemical composition was observed in both harbor and urban areas. The high correlation of nighttime PM2.5 levels between the port and urban areas suggests inter-transport phenomena. Sea salt spray, ship emissions, secondary aerosols, and heavy fuel-oil boilers exhibit higher levels in the port area than in the urban area. In Metro Kaohsiung, mobile sources, fugitive dust, and waste incinerators emerge as major PM2.5 contributors. Furthermore, sea breeze significantly influences PM2.5 dispersion from Kaohsiung Harbor to Metro Kaohsiung, particularly in the afternoon. The average contribution of PM2.5 from ships' main engines in Kaohsiung Harbor ranges from 2.9% to 5.3%, while auxiliary engines contribute 3.8%–8.3% of PM2.5 in Metro Kaohsiung. © 2024 Elsevier Ltd

关键词： Ships

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INTEGRATING SENTINEL-1 SYNTHETIC APERTURE RAdAR ANd CHIRPS dATA FOR UNdERSTANdING HEAVY PRECIPITATION ANd FLOOdING IN AN GIANG PROVINCE, VIET NAM 44

INTEGRATING SENTINEL-1 SYNTHETIC APERTURE RADAR AND CHIRPS D...

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44th Asian Conference on Remote Sensing, ACRS 2023

作者： Minh, Ton Binh Chiang, Shou-Hao International Ph.D Program in Environmental Science and Technology University System of Taiwan No. 300 Zhongda Rd. Zhongli District Taoyuan City32001 Taiwan Center for Space and Remote Sensing Research National Central University No. 300 Zhongda Rd. Zhongli District Taoyuan City32001 Taiwan

ISBN: (纸本)9781713893646

Understanding the mechanisms of heavy precipitation and flooding is essential for effective climate change adaptation and response. The cloud-penetrating ability of microwaves makes Synthetic Aperture Radar (SAR) an ideal tool for providing weather-independent images for flood mapping. Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) is a land-only rainfall dataset that incorporates 0.05° resolution satellite imagery with in-situ station data to create gridded rainfall time series for various analysis applications. This study employs intensity images from Sentinel-1 satellites to generate flood maps and utilizes CHIRPS to derive heavy rainfall frequency. The segmentation technique is applied to distinguish between pre-existing standing water, recently flooded areas, and non-flooded regions within the study area. By combining SAR and CHIRPS data, this research yields valuable insights into the relationship between heavy rainfall and flood occurrences in An Giang province, Viet Nam. The escalating frequency of heavy precipitation correlates with an augmentation in local rainfall amounts, and a positive correlation emerges between heavy rainfall and the extension of flood-prone areas. While recognizing that flooding influences water flow from the upstream of the Mekong River, flooding discharges from neighboring areas, and tidal levels, the accelerated trend of urbanization has also played a significant role. The expansion of impervious surfaces contributes to the severity of deep floods and elevates flood potential in the region. Furthermore, this research affirms the effectiveness of SAR intensity image mapping for flood detection, and the integration of SAR and CHIRPS data furthers our understanding of heavy precipitation mechanisms. As the implications of climate change persist, the findings are crucial for developing sustainable flood management strategies, as well as enhancing resilience to climate-induced challenges in the Mekong River del

关键词： CHIRPS climate change Flood Mekong River delta Sentinel-1

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Two-phase cost-sensitive-learning-based framework on customer-side quality inspection for TFT-LCd industry

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Journal of Intelligent Manufacturing 2024年

作者： Shih, Ming-Sung Chen, James C. Chen, Tzu-Li Hsu, Ching-Lan International Intercollegiate Ph.D. Program National Tsing Hua University Hsinchu30013 Taiwan Department of Industrial Engineering and Engineering Management National Tsing Hua University Hsinchu30013 Taiwan Graduate Institute of Intelligent Manufacturing Technology National Taiwan University of Science and Technology Taipei106335 Taiwan

The Covid-19 outbreak in 2020 boosted the stay-at-home economy, causing a surge in electronics industry demand, especially benefiting the LCd panel sector. However, as the pandemic situation improved, countries revised policies, leading to the gradual discontinuation of remote work arrangements in various industries. This resulted in declining dividends for the stay-at-home economy. The decreased demand created intense competition within the TFT-LCd industry, urging panel companies to prioritize product quality enhancement to meet customer expectations. Panel quality inspection heavily relied on manual labor, causing varying inspection levels due to subjective judgments. Understanding and aligning with customer expectations regarding product quality inspections became imperative. Identifying defective products during inspection led to additional costs for the companies. Balancing customer product quality requirements and re-inspection costs became crucial for optimal benefits. This study addresses the binary classification problem of customer-side quality inspection through cost-sensitive learning. The predictive model considers panel process yield, production history, customer feedback, inspection capacity constraints, and cost minimization to predict panel quality as accepted or defective. To tackle the highly imbalanced data, a two-phase cost-sensitive-learning-based framework is proposed, combining data preprocessing methods and models, while considering re-inspection capacity constraints and costs to enhance accuracy. The model’s evaluation uses key performance indicators like AUC and G-mean. Actual inspection cost and defective parts per million (dPPM) are calculated based on the company’s practical assessment. Two products are used for experimentation to validate the proposed model, demonstrating over 50% reduction in inspection cost and over 10% improvement in dPPM. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Spr

关键词： Inspection

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