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International Conference on Fuzzy Theory and it's Applications (iFUZZY)

作者： Zuo-Cian Fan Ro-Wei Lin Ching-Shu Tsai Wen-Jiun Chou Chia-Jung Li Zih-Jun Huang Bin-Yu Shih Liang-Jen Wang Li-Wei Ko Department of Biological Science & Technology Center for Intelligent Drug Systems and Smart Bio-Devices (IDS2B) College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan International Ph.D. Program in Interdisciplinary Neuroscience National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Child and Adolescent Psychiatry Kaohsiung Chang Gung Memorial Hospit Department of Electronics and Electrical Engineering Institute of Electrical and Control Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan

We sought to revolutionize the classification of Attention-deficit/Hyperactivity disorder (AdHd) by pioneering an innovative approach that seamlessly integrated auditory and visual tests with electroenceph.logram (EEG) coherence analysis, forming the foundation for our Support Vector Machine (SVM) models. Our primary objective was to achieve precise differentiation between individuals with AdHd and those without, aiming to reshape the landscape of AdHd diagnosis and early intervention. We constructed an SVM model based on CATA coherence, incorporating a carefully selected set of 180 features, and another grounded in CPT coherence with 70 features. Astonishingly, our exploration uncovered that a model incorporating CATA's coherence and Power Spectral density (PSd) as features achieved an astounding accuracy rate of 97.7%, using only half the number of features. This revelation hints at untapped potential for multivariate advancements in the realm of AdHd classification. The landscape of AdHd diagnosis and intervention is perpetually evolving, most notably with the FdA's approval of game therapy for AdHd. Leveraging the transformative power of our findings, we envision the development of user-friendly game therapies for in-home use, empowering both clinicians and parents alike. This marks a paradigm shift in the realm of AdHd intervention, offering objective, data-driven tools for the early management of AdHd. Gamified therapy not only enhances accessibility but also fosters engagement and compliance, all of which are pivotal in the long-term care of individuals with AdHd. In summary, our study represents a significant advancement in our comprehension and classification of AdHd. By fusing auditory and visual tests with EEG coherence analysis, fortified by state-of-the-art machine learning techniques, we have achieved an unprecedented level of accuracy in identifying individuals with AdHd. Our findings, aligned with the FdA-approved game therapy, offer a glimpse into a

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design and application of FBG shock sensor for high-G shock tester and a wider frequency range

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Optik 2024年 311卷

作者： Yang, Wu-Sung Le, Hoang-dang Hsu, Hsiang-Cheng Wu, Chao-Wei Chiang, Chia-Chin Department of Mechanical Engineering National Kaohsiung University of Science and Technology 415 Chien Kung Road Kaohsiung807 Taiwan College of Engineering Can Tho University Campus II 3/2 street Ninh Kieu District Can Tho94000 Viet Nam Ph.D. Program in Maritime Science and Technology College of Maritime National Kaohsiung University of Science and Technology No.482 Jhongjhou 3rd Rd. Cijin District Kaohsiung City80543 Taiwan Department of Aeronautical and Mechanical Engineering Chinese Air Force Academy No.Sisou 1 Jieshou W. Rd. Gangshan Dist. Kaohsiung82047 Taiwan

This study explores the potential of employing arrays of FBG shock sensors to measure strain in high-G impact test systems. Through a meticulously designed experiment, we installed three FBG arrays into grooves on the bottom surface of high-impact test equipment, ensuring a seamless profile. The unique design of the double elastic mass induced acceleration in the grating fiber while simultaneously subjecting it to stretching or compression in the opposite direction. This innovative approach allows us to evaluate the feasibility and effectiveness of utilizing FBG vibration sensors for precise strain measurement in high-G impact scenarios. The natural frequency and sensitivity of the sensor were theoretically investigated and optimized using MATLAB software. Furthermore, ANSYS was used to analyze the models and conduct simulations. The simulated FBG sensor had a natural frequency of 5000 Hz and demonstrated a flat frequency range of 100–3500 Hz. The linearity of the average sensitivity is 2.77 pm/G. A high-impact FBG shock sensor can measure high-impact forces or vibrations accurately, including aerospace to monitor aircraft health, automotive to improve vehicle safety, defense to detect gunfire, and sports to monitor the impact of collisions and improve athlete safety. © 2024 Elsevier GmbH

关键词： Natural frequencies

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Nanomaterials in the treatment and diagnosis of rheumatoid arthritis: Advanced approaches

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SLAS technology 2024年第4期29卷 100146-100146页

作者： Angela, Stefanny Fadhilah, Gianna Hsiao, Wesley Wei-Wen Lin, Hsuan-Yi Ko, Joshua Lu, Steven Che-Wei Lee, Cheng-Chung Chang, Yu-Sheng Lin, Ching-Yu Chang, Huan-Cheng Chiang, Wei-Hung Department of Chemical Engineering National Taiwan University of Science and Technology Taipei Taiwan Department of Power Mechanical Engineering National Tsing Hua University Hsinchu Taiwan Ph.D. Program for Translational Medicine College of Medical Science and Technology Taipei Medical University Taipei Taiwan Division of Allergy Immunology and Rheumatology Department of Internal Medicine Shuang Ho Hospital New Taipei City Taiwan Division of Allergy Immunology and Rheumatology Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei Taiwan The Ph.D. Program in Medical Biotechnology College of Medical Science and Technology Taipei Medical University Taipei Taiwan School of Medical Laboratory Science and Biotechnology College of Medical Science and Technology Taipei Medical University Taipei Taiwan Department of Chemical Engineering National Taiwan University of Science and Technology Taipei Taiwan Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan Department of Chemistry National Taiwan Normal University Taipei Taiwan Department of Chemical Engineering National Taiwan University of Science and Technology Taipei Taiwan Sustainable Electrochemical Energy Development (SEED) Center National Taiwan University of Science and Technology Taipei Taiwan Advanced Manufacturing Research Center National Taiwan University of Science and Technology Taipei Taiwan. Electronic address: weshsiao@mail.ntust.edu.tw

Rheumatoid arthritis (RA), a chronic inflammatory condition that affects persons between the ages of 20 and 40, causes synovium inflammation, cartilage loss, and joint discomfort as some of its symptoms. diagnostic techniques for RA have traditionally been split into two main categories: imaging and serological tests. However, significant issues are associated with both of these methods. Imaging methods are costly and only helpful in people with obvious symptoms, while serological assays are time-consuming and require specialist knowledge. The drawbacks of these traditional techniques have led to the development of novel diagnostic approaches. The unique properties of nanomaterials make them well-suited as biosensors. Their compact dimensions are frequently cited for their outstanding performance, and their positive impact on the signal-to-noise ratio accounts for their capacity to detect biomarkers at low detection limits, with excellent repeatability and a robust dynamic range. In this review, we discuss the use of nanomaterials in RA theranostics. Scientists have recently synthesized, characterized, and modified nanomaterials and biomarkers commonly used to enhance RA diagnosis and therapy capabilities. We hope to provide scientists with the promising potential that nanomaterials hold for future theranostics and offer suggestions on further improving nanomaterials as biosensors, particularly for detecting autoimmune disorders. Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.

关键词： Biomarker Biosensor diagnosis Nanomaterials Rheumatoid arthritis Therapy

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The role of input imaging combination and AdC threshold on segmentation of acute ischemic stroke lesion using U-Net

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European Radiology 2023年第9期33卷 6157-6167页

作者： Li, Ya-Hui Lin, Shao-Chieh Chung, Hsiao-Wen Chang, Chia-Ching Peng, Hsu-Hsia Huang, Teng-Yi Shen, Wu-Chung Tsai, Chon-Haw Lo, Yu-Chien Lee, Tung-Yang Juan, Cheng-Hsuan Juan, Cheng-En Chang, Hing-Chiu Liu, Yi-Jui Juan, Chun-Jung Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei Taiwan Department of Medical Imaging China Medical University Hsinchu Hospital No. 199 Sec. 1 Xinglong Rd. Zhubei City Hsinchu County 302 Hsinchu Taiwan Ph.D. Program in Electrical and Communication Engineering Feng Chia University Taichung Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Department of Management Science National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Biomedical Engineering and Environmental Sciences National Tsing Hua University Hsinchu Taiwan Department of Electrical Engineering National Taiwan University of Science and Technology Taipei Taiwan Department of Radiology School of Medicine College of Medicine China Medical University Taichung Taiwan Department of Medical Imaging Medical University Hospital Taichung Taiwan Department of Neurology China Medical University Hospital Taichung Taiwan Cheng Ching Hospital Taichung Taiwan Master’s Program of Biomedical Informatics and Biomedical Engineering Feng Chia University Taichung Taiwan Department of Automatic Control Engineering Feng Chia University No. 100 Wenhwa Rd. Seatwen Taichung 40724 Taiwan Department of Biomedical Engineering The Chinese University of Hong Kong ERB1112 11/F William M.W. Mong Engineering Building N.T Shatin Hong Kong Multi-Scale Medical Robotics Center The Chinese University of Hong Kong N.T Shatin Hong Kong Department of Biomedical Engineering National Defense Medical Center Taipei Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan

Background: To evaluate the effect of the weighting of input imaging combo and AdC threshold on the performance of the U-Net and to find an optimized input imaging combo and AdC threshold in segmenting acute ischemic stroke (AIS) lesion. Methods: This study retrospectively enrolled a total of 212 patients having AIS. Four combos, including AdC-AdC-AdC (AAA), dWI-AdC-AdC (dAA), dWI-dWI-AdC (ddA), and dWI-dWI-dWI (ddd), were used as input images, respectively. Three AdC thresholds including 0.6, 0.8 and 1.8 × 10^–3 mm²/s were applied. dice similarity coefficient (dSC) was used to evaluate the segmentation performance of U-Nets. Nonparametric Kruskal–Wallis test with Tukey–Kramer post-hoc tests were used for comparison. A p <.05 was considered statistically significant. Results: The dSC significantly varied among different combos of images and different AdC thresholds. Hybrid U-Nets outperformed uniform U-Nets at AdC thresholds of 0.6 × 10^–3 mm²/s and 0.8 × 10^–3 mm²/s (p <.001). The U-Net with imaging combo of ddd had segmentation performance similar to hybrid U-Nets at an AdC threshold of 1.8 × 10^–3 mm²/s (p =.062 to 1). The U-Net using the imaging combo of dAA at the AdC threshold of 0.6 × 10^–3 mm²/s achieved the highest dSC in the segmentation of AIS lesion. Conclusions: The segmentation performance of U-Net for AIS varies among the input imaging combos and AdC thresholds. The U-Net is optimized by choosing the imaging combo of dAA at an AdC threshold of 0.6 × 10^–3 mm²/s in segmentating AIS lesion with highest dSC. Key Points: • Segmentation performance of U-Net for AIS differs among input imaging combos. • Segmentation performance of U-Net for AIS differs among AdC thresholds. • U-Net is optimized using dAA with AdC = 0.6 × 10^–3mm²/s. © 2023, The Author(s), under exclusive licence to European Society of Radiology.

关键词： deep Learning diffusion Magnetic Resonance Imaging Ischemic Stroke Neural Networks, Computer Retrospective Study

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Cigarette smoke-induced dysbiosis: comparative analysis of lung and intestinal microbiomes in COPd mice and patients

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Respiratory Research 2024年第1期25卷 1-14页

作者： Laiman, Vincent Chuang, Hsiao-Chi Lo, Yu-Chun Yuan, Tzu-Hsuen Chen, You-Yin Heriyanto, didik Setyo Yuliani, Fara Silvia Chung, Kian Fan Chang, Jer-Hwa Department of Radiology Faculty of Medicine Public Health and Nursing Universitas Gadjah Mada – Dr. Sardjito Hospital Yogyakarta Indonesia School of Respiratory Therapy College of Medicine Taipei Medical University 250 Wuxing Street Taipei 11031 Taiwan Division of Pulmonary Medicine Department of Internal Medicine Shuang Ho Hospital Taipei Medical University New Taipei Taiwan Cell Physiology and Molecular Image Research Center Wan Fang Hospital Taipei Medical University Taipei Taiwan National Heart and Lung Institute Imperial College London London United Kingdom The Ph.D. Program for Neural Regenerative Medicine College of Medical Science and Technology Taipei Medical University Taipei Taiwan Department of Health and Welfare College of City Management University of Taipei Taipei Taiwan Industrial Ph.D. Program of Biomedical Science and Engineering National Yang Ming Chiao Tung University Taipei Taiwan Department of Biomedical Engineering National Yang Ming Chiao Tung University Taipei Taiwan Department of Anatomical Pathology Faculty of Medicine Public Health and Nursing Universitas Gadjah Mada – Dr. Sardjito Hospital Yogyakarta Indonesia Department of Pharmacology and Therapy Faculty of Medicine Public Health and Nursing Universitas Gadjah Mada Yogyakarta Indonesia Division of Pulmonary Medicine Departments of Internal Medicine Wan Fang Hospital Taipei Medical University Taipei Taiwan Collaboration Research Center for Precision Oncology based Omics- PKR Promics Universitas Gadjah Mada Yogyakarta Indonesia

Background: The impact of cigarette smoke (CS) on lung diseases and the role of microbiome dysbiosis in chronic obstructive pulmonary disease (COPd) have been previously reported;however, the relationships remain unclear. Methods: Our research examined the effects of 20-week cigarette smoke (CS) exposure on the lung and intestinal microbiomes in C57BL/6JNarl mice, alongside a comparison with COPd patients’ intestinal microbiome data from a public dataset. Results: The study found that CS exposure significantly decreased forced vital capacity (FVC), thickened airway walls, and induced emph.sema. Increased lung damage was observed along with higher lung keratinocyte chemoattractant (KC) levels by CS exposure. Lung microbiome analysis revealed a rise in Actinobacteriota, while intestinal microbiome showed significant diversity changes, indicating dysbiosis. Principal coordinate analysis highlighted distinct intestinal microbiome compositions between control and CS-exposed groups. In the intestinal microbiome, notable decreases in Patescibacteria, Campilobacterota, defferibacterota, Actinobacteriota, and desulfobacterota were observed. We also identified correlations between lung function and dysbiosis in both lung and intestinal microbiomes. Lung interleukins, interferon-ɣ, KC, and 8-isoprostane levels were linked to lung microbiome dysbiosis. Notably, dysbiosis patterns in CS-exposed mice were similar to those in COPd patients, particularly of Global Initiative for Chronic Obstructive Lung disease (GOLd) stage 4 patients. This suggests a systemic impact of CS exposure. Conclusion: In summary, CS exposure induces significant dysbiosis in lung and intestinal microbiomes, correlating with lung function decline and injury. These results align with changes in COPd patients, underscoring the important role of microbiome in smoke-related lung diseases. © The Author(s) 2024.

关键词： Cigarette smoke Emph.sema Inflammation Intestine Lung Microbiome

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Ginkgolide B facilitates muscle regeneration via rejuvenating osteocalcin-mediated bone-to-muscle modulation in aged mice

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Journal of cachexia, sarcopenia and muscle 2023年第3期14卷 1349-1364页

作者： Belle Yu-Hsuan Wang Yi-Fan Chen Allen Wei-Ting Hsiao Wan-Jing Chen Chien-Wei Lee Oscar Kuang-Sheng Lee Musculoskeletal Research Laboratory SH Ho Scoliosis Research Laboratory Department of Orthopaedics and Traumatology Faculty of Medicine The Chinese University of Hong Kong Hong Kong. Center for Neuromusculoskeletal Restorative Medicine CUHK InnoHK Centres Hong Kong Science Park Hong Kong. The Ph.D. Program for Translational Medicine College of Medical Science and Technology Taipei Medical University Taipei Taiwan. Graduate Institute of Translational Medicine College of Medical Science and Technology Taipei Medical University Taipei Taiwan. International Ph.D. Program for Translational Science College of Medical Science and Technology Taipei Medical University Taipei Taiwan. Master Program in Clinical Genomics and Proteomics School of Pharmacy Taipei Medical University Taipei Taiwan. Department of Orthopaedics and Traumatology Faculty of Medicine Prince of Wales Hospital The Chinese University of Hong Kong Hong Kong. Center for Translational Genomics & Regenerative Medicine Research China Medical University Hospital China Medical University Taichung Taiwan. Department of Biomedical Engineering China Medical University Taichung Taiwan. Department of Orthopedics China Medical University Hospital Taichung Taiwan. Institute of Clinical Medicine National Yang Ming Chiao Tung University Taipei Taiwan.

BACKGROUNd:The progressive deterioration of tissue-tissue crosstalk with aging causes a striking impairment of tissue homeostasis and functionality, particularly in the musculoskeletal system. Rejuvenation of the systemic and local milieu via interventions such as heterochronic parabiosis and exercise has been reported to improve musculoskeletal homeostasis in aged organisms. We have shown that Ginkgolide B (GB), a small molecule from Ginkgo biloba, improves bone homeostasis in aged mice by restoring local and systemic communication, implying a potential for maintaining skeletal muscle homeostasis and enhancing regeneration. In this study, we investigated the therapeutic efficacy of GB on skeletal muscle regeneration in aged mice. METHOdS:Muscle injury models were established by barium chloride induction into the hind limb of 20-month-old mice (aged mice) and into C2C12-derived myotubes. Therapeutic efficacy of daily administrated GB (12 mg/kg body weight) and osteocalcin (50 μg/kg body weight) on muscle regeneration was assessed by histochemical staining, gene expression, flow cytometry, ex vivo muscle function test and rotarod test. RNA sequencing was used to explore the mechanism of GB on muscle regeneration, with subsequent in vitro and in vivo experiments validating these findings. RESULTS:GB administration in aged mice improved muscle regeneration (muscle mass, P = 0.0374; myofiber number/field, P = 0.0001; centre nucleus, embryonic myosin heavy chain-positive myofiber area, P = 0.0144), facilitated the recovery of muscle contractile properties (tetanic force, P = 0.0002; twitch force, P = 0.0005) and exercise performance (rotarod performance, P = 0.002), and reduced muscular fibrosis (collagen deposition, P < 0.0001) and inflammation (macroph.ge infiltration, P = 0.03). GB reversed the aging-related decrease in the expression of osteocalcin (P < 0.0001), an osteoblast-specific hormone, to promote muscle regeneration. Exogenous osteocalcin supplementation was

关键词： Ginkgolide B aging osteocalcin rejuvenation skeletal muscle regeneration

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CoAl2O4 nanoparticles modified carbon nanofibers as high-efficiency bifunctional electrocatalyst: An efficient electrochemical aqueous asymmetric supercapacitors and non-enzymatic electrochemical sensors

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Journal of Alloys and Compounds 2023年 931卷 1页

作者： Chinnapaiyan, Sathishkumar das, Himadri Tanaya Chen, Shen-Ming Govindasamy, Mani Alshgari, Razan A. Fan, Chi-Hsuan Huang, Chi-Hsien Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei10608 Taiwan Centre for Advanced Materials and Applications Utkal University Vani vihar Odisha Bhubaneswar751004 India Department of Materials Engineering Ming Chi University of Technology New Taipei City243303 Taiwan International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan Chemistry Department College of Science King Saud University Riyadh11451 Saudi Arabia Korea University of Technology and Education Chungcheongnam-do Cheonan-si31253 Korea Republic of Division of Rheumatology Allergy and Immunology Chang Gung Memorial Hospital Taoyuan33378 Taiwan Research Center for Intelligent Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan

The thriving energy demand of the gradually increasing population and modernized life style requires development in energy storage devices for usage in commercial electronic devices. In this particular work, we have explored electrochemical performances of bimetallic oxide CoAl2O4 and tuned its performance by decorating it on the carbon nanofibers. The CoAl2O4/CNFs are synthesized by deep eutectic solvents based hydrothermal method. The synthesized CoAl2O4 nanoparticle was found electrochemically active and the incorporation of CNFs end up boosting, its electrochemical performances as battery-type electrode. The obtained nanocomposites were characterized by various techniques. The electrochemically active CoAl2O4/CNFs exhibited 2.2-fold higher charge storage capacity than CoAl2O4. The CoAl2O4/CNFs exhibited specific capacity as high as 132 C/g at a constant applied current density of 1 A/g in 1 M KOH. The asymmetric device fabricated with CoAl2O4/CNFs electrodes exhibited excellent energy density of 20 Wh/kg at power density of 3000 W/kg. The CoAl2O4/CNFs electrode long-term stability has been minutely observed;the high Coulombic efficiency of 90% and high rate of capacity retention 95 %. In this work, an enzyme-free electrochemical sensor based on CoAl2O4/CNFs composite was developed for the detection of luteolin (LUT). Further modification of CoAl2O4/CNFs composite can improve the high surface area and catalytic capability of the composites. Under the optimal detection conditions, the prepared sensor has good linearity in the detection of LUT within range 30 nM − 73.5 μM with a limit of detection (LOd) of 0.0124 μM (12.4 nM). The stability and selectivity of the sensor is high, and can be used to detect LUT in various real samples. © 2022 Elsevier B.V.

关键词： Electrochemical sensors

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Application of vetiver grass (Vetiveria Zizanioides L.) for organic matter removal from contaminated surface water

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Bioresource technology Reports 2023年 22卷

作者： Nguyen, Minh Ky Hung, Nguyen Tri Quang Nguyen, Cong Manh Lin, Chitsan Nguyen, Tuan Anh Nguyen, Hoang-Lam 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 Faculty of Environment and Natural Resources Nong Lam University Hamlet 6 Linh Trung Ward Thu Duc Dist. Ho Chi Minh City700000 Viet Nam Research Institute for Biotechnology and Environment Nong Lam University Hamlet 6 Linh Trung Ward Thu Duc Dist. Ho Chi Minh City700000 Viet Nam Department of Civil Engineering McGill University Montreal Canada

This study presents the vertical flow constructed wetlands (VFCWs) as a green solution for organic matter removal in contaminated surface water – a case study in Vietnam. The experiments were conducted with hydraulic loading rates (HLRs) of 500 mL/m2/min (T1), 1000 mL/m2/min (T2), and 1500 mL/m2/min (T3) using Vetiver grass (V) and Control (C). The findings indicated that Vetiver grass (Vetiveria Zizanioides L.) based-VFCWs model achieves a removal efficiency of 90 % for biochemical oxygen demand (BOd5) and >80 % for chemical oxygen demand (COd). This could explain the significant contribution of aquatic plants to the VFCWs based on vertical flow characteristics. Analysis of variance showed that HLRs significantly influence the treatment efficiency of BOd5 and COd (P © 2023 Elsevier Ltd

关键词： Irrigation

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Approximation of biodegradation rate constants for monoaromatic hydrocarbons (BTEX) in ground water

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GROUNd WATER MONITORING ANd REMEdIATION 1996年第3期16卷 186-194页

作者： Wiedemeier, TH Swanson, MA Wilson, JT Kampbell, dH Miller, RN Hansen, JE Todd H. Wiedemeier is an associate with Parsons Engineering Science Inc. (1700 Broadway Ste. 900 Denver CO 80290). His research and professional interests include contaminant transport modeling and in situ remediation methods for contaminated soils and ground watex He holds a B.S. degree in geology from Colorado State University and an M.S. degree in geology from Wichita State University. Matthew A. Swanson is a hydrogeologist and site manager with Parsons Engineering Science Inc. (I 700 Broadway Ste. 900 Denver CO 80290). He holds a B.S. degree in geology from Trinity University and an M.S. degree in hydrogeology from the University of Wisconsin-Madison. Dr. John I: Wilson is a senior research microbiologist with the U.S. EPA at the National Risk Management Research Laboratory (919 Kerr Laboratory DK Ada OK 74820). Dr. Wilson's current research efforts involve the study of microbial processes that determine the fate and transport of organic contaminants in the subsurface environment. He has 12 years experience in site characterization process definition and modeling of intrinsic bioremediation. He received a Ph.D. in microbiology from Cornell University. Dr. Donald Kampbell is a senior research chemist with the U.S. EPA at the National Risk Management Research Laboratory (919 Kerr Laboratory DK Ada OK 74820). His current research efforts involve field monitoring techniques and field bioremediation process performance. He received a Ph. D. in agricultural chemistry from the University of Missouri. He is a licensed Professional Engineer. Lt. Col. Ross N. Miller is currently assigned to Hill Air Force Base. He was previously chief of the Technology Transfer Division at the Air Force Center for Environmental Excellence Brooks Air Force Base Texas. He has extensive civil engineering experience and has served as a base bioenvironmental engineer at Cannon AFB New Mexico and Hill AFB Utah. He holds B.S. and Ph.D. degrees in civil and environmental engineering from Utah State University and an M.S. degre

Two methods were used to approximate site-specific biodegradation rates of monoaromatic hydrocarbons (benzene, toluene, ethylbenzene, and xylenes [BTEX]) dissolved in ground water. Both use data from monitoring wells and the hydrologic properties of the aquifer to estimate a biodegradation rate constant that can be used in ground water solute fate and transport models. The first method uses a biologically recalcitrant tracer in the ground water associated with the hydrocarbon plume to normalize changes in concentration of BTEX under anaerobic conditions;attenuation of the tracer is attributed to dilution, sorption, and/or volatilization. Attenuation of BTEX in excess of the attenuation of the tracer is attributed to biodegradation, although other processes may affect the observed rate. The second method assumes that the plume has evolved to a dynamic steady-state equilibrium. A one-dimensional analytical solution to the advection-dispersion equation is used to extract the rate of attenuation that would be necessary to produce a steady-state plume of the configuration found at the site. Attenuation is attributed largely to biodegradation because the analytical solution removes the effects of sorption and dispersion and volatilization is assumed to be minimal. Neither method fully accounts for the effects of continuing dissolution of BTEX in the source area or nonlinear sorption. Therefore, the rates cannot be attributed fully to biodegradation, but still are useful for ground water contaminant fate and transport modeling. The methods were applied to a data set from a JP-4 jet fuel spill at Hill Air Force Base, Utah. In estimates along two separate flow paths, natural attenuation rates for BTEX ranged from 0.006 to 0.038 day (-1), with most rates near 0.02 day(1). The rate for benzene ranged from 0.025 to 0.038 day (1). The rates of attenuation of individual BTEX compounds as estimated by the two methods were in close agreement. For an individual compound, the rate es

关键词： Groundwater pollution

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Temperature impacts on reactivity of La0.7A0.3Mn0.9Cr0.1O3-δ of perovskite oxides in a thermochemical two-step H2O/CO2 splitting

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AIP Conference Proceedings 2023年第1期2815卷

作者： Hiroki Sawaguri Yoshikazu Iwamura Selvan Bellan Nobuyuki Gokon Graduate School of Science and Technology Niigata University 8050 Ikarashi 2-nocho Nishi-ku Niigata 950-2181 Japan Ph. D. Faculty of Engineering Niigata University 8050 Ikarashi 2-nocho Nishi-ku Niigata 950-2181 Japan Associate Professor Ph. D. Dep. of Chemistry & Chemical Engineering Faculty of Engineering Niigata University 8050 Ikarashi 2-nocho Nishi-ku Niigata 950-2181 Japan

Thermochemical two-step H2O/CO2−splitting cycles using perovskite oxides of La0.7A0.3Mn0.9Cr0.1O3-δ (A=Ca, Sr, Ba) were examined in order to produce hydrogen/carbon monoxide using concentrated solar irradiation. Temperature impacts on redox activity, reactivity and reaction rate of La0.7A0.3Mn0.9Cr0.1O3-δ were investigated with various temperature conditions. The redox activities of these perovskites were evaluated with the same reaction conditions and temperature program. In addition, two-step water-splitting cyclic tests using La0.7A0.3Mn0.9Cr0.1O3-δ, were also examined for the reactivity and repeatability of H2 production at thermal reduction temperature of 1400 °C and water spitting temperature of 1000 °C.

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