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Halobacterium salinarum NRC-1 Sustains Voltage Production in a Dual-Chambered Closed Microbial Fuel Cell

Scientific World Journal 2022年第1期2022卷 3885745页

作者： Goncalves, Rodrigo Oliveira Salehi, Ali Publico, Marlon Nyende, Jimmy Nadarajah, Nalina Ghoreyshi, Soheil Shastri, Padmaja Biomedical Engineering Program Applied Biological and Environmental Science Centennial College 941 Progress Avenue Scarborough M1G 3T8 Canada Biotechnology Program Applied Biological and Environmental Science Centennial College 755 Morningside Avenue Scarborough M1C 4Z4 Canada

Sustained bioenergy production from organisms that thrive in high salinity, low oxygen, and low nutrition levels is useful in monitoring hypersaline polluted environments. Microbial fuel cell (MFC) studies utilizing single species halophiles under salt concentrations higher than 1 M and as a closed microbial system are limited. The current study aimed to establish baseline voltage, current, and power density from a dual-chambered MFC utilizing the halophile Halobacterium salinarum NRC-1. MFC performance was determined with two different electrode sizes (5 cm2 and 10 cm2), under oscillating and nonoscillating conditions, as well as in a stacked series. A closed dual-chamber MFC system of 100 mL capacity was devised with Halobacterium media (4.3 M salt concentration) as both anolyte and catholyte, with H. salinarum NRC-1 being the anodic organism. The MFC measured electrical output over 7, 14, 28, and 42 days. MFC output increased with 5 cm2 sized electrodes under nonoscillating (p<0.0001) relative to oscillating conditions. However, under oscillating conditions, doubling the electrode size increased MFC output significantly (p=0.01). The stacked series MFC, with an electrode size of 10 cm2, produced the highest power density (1.2672 mW/m2) over 14 days under oscillation. Our results highlight the potentiality of H. salinarum as a viable anodic organism to produce sustained voltage in a closed-MFC system. © 2022 Rodrigo Oliveira Goncalves et al.

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Towards better utilization of NEXRAD data in hydrology: An overview of hydro-NEXRAD

Towards better utilization of NEXRAD data in hydrology: An o...

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作者： Krajewski, Witold F. Kruger, Anton Lawrence, Ramon Smith, James A. Bradley, A. Allen Steiner, Matthias Baeck, Mary Lynn Ramamurthy, Mohan K. Weber, Jeffrey DelGreco, Stephen A. Seo, Bong-Chul Domaszczynski, Piotr Gunyon, Charles Goska, Radoslaw IIHR-Hydroscience and Engineering University of Iowa Iowa IA 52242 United States Civil and Environmental Engineering Princeton University Princeton NJ 08544 United States Unidata Program Center UCAR Boulder CO 80307 United States National Center for Atmospheric Research UCAR Boulder CO 80307 United States National Climatic Data Center Ashville NC 28801 United States Computer Science University of British Columbia Okanagan BC V1V 1V7 Canada

ISBN: (纸本)9780784409275

With a very modest investment in computer hardware and the open source local data manger (LDM) software from UCAR's Unidata program Center, an individual researcher can receive a variety of NEXRAD Level III gridded rainfall products, and the unprocessed Level II data in real-time from most NEXRAD radars. Additionally, the National Climatic Data Center has vast archives of these products and Level II data. Still, significant obstacles remain in order to unlock the full potential of the data. One set of obstacles is related to effective management of multi-terrabyte data sets: storing, compressing, and backing up. A second set of obstacles, for hydrologists and hydrometeorologists in particular, is that the NEXRAD Level III products are not well suited for application in hydrology. There is a strong need for the generation of high-quality products directly from the Level II data with well-documented steps that include quality control, removal of false echoes, rainfall estimation algorithms with variety of corrections, coordinate conversion and georeferencing, conversion to a convenient data format(s), and integration with GIS. For hydrologists it is imperative that these procedures are basin-centered as opposed to radar-centered. Thirdly, the amount of data present in a multi-year, multi-radar dataset is such that simple cataloging and indexing of the data is not sufficient. Rather, sophisticated metadata extraction and management techniques are required. The authors describe and discuss the Hydro-NEXRAD software system that addresses the above three challenges. With support from the National science Foundation through its ITR program, the authors are developing a basin-centered framework for addressing all these issues in a comprehensive manner, tailored specifically for use of NEXRAD data in hydrology and hydrometeorology. Through a flexible web interface users can search a large metadata database base, managed by a relational database, for subsets of interest. Well

关键词： Open systems

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Development and study of electrical property on phantom for human body communication considering tissue structure of human arm

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Journal of Japan Institute of Electronics Packaging 2014年第1期17卷 63-68页

作者： Muramatsu, Dairoku Koshiji, Fukuro Koshiji, Kohji Sasaki, Ken Department of Human and Engineered Environmental Studies Graduate School of Frontier Science University of Tokyo 5-1-5 Kashiwano-ha Kashiwa-shi Chiba 277-8563 Japan Program in Electrical Engineering Graduate School of Engineering Kokushikan University 4-28-1 Setagaya Setagaya-ku Tokyo 154-8515 Japan Department of Electrical Engineering Graduate School of Science and Technology Tokyo University of Science 2641 Yamazaki Noda-shi Chiba 278-8510 Japan

Human body communication is expected to be a viable new transmission method for networks between wearable devices working together in a body area network (BAN). Wearable devices demand long battery life, small size, and light weight. Therefore, it is important to investigate the input impedance characteristics of the electrodes and design the electrode structure in such a way as to improve the communication qualities. The characteristics of the human body are important for designing the antennas (electrodes) used for close range communication in a human body communication system. Normally, homogenous muscle phantoms are used for measuring the input impedance characteristics of these antennas. However, nobody has measured the input impedance characteristics of electrodes for human body communication at a frequency of 10 MHz using phantoms that take into account the actual tissue structure of the human body. Therefore, it is necessary to measure the impedance characteristics using phantoms which consider skin, fat, and muscle. In this study, changes in the input impedance characteristics were analyzed considering the electrical properties of a phantom containing muscle and fat. Moreover we tried to develop a human muscle and fat phantom for human body communication system available at a frequency of 10 MHz.

关键词： Phantoms

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Thermophysical properties of PuO2 and AmO2 solid solutions simulated by molecular dynamics

Thermophysical properties of PuO2 and AmO2 solid solutions s...

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2007 MRS Fall Meeting

作者： Seetawan, Tosawat Khuangthip, Thaweewat Amornkitbamrung, Vittaya Kurosaki, Ken Adachi, Jun Katayama, Masahito Charoenphakdee, Anek Yamanaka, Shinsuke Program of Physics Faculty of Science and Technology Sakon Nakhon Rajabhat University 680 Nittayo Road Sakon Nakhon 47000 Thailand Integrated Nanotechnology Research Center Departments of Physics Khon Kaen 123 Mittraparb Road Muang District Khon Kaen 40002 Thailand Division of Sustainable Energy and Environmental Engineering Graduate School Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan

ISBN: (纸本)9781605606248

PuO2 and AmO2 solid solutions: (Pu, Am)O2 are one of the candidates of fuels in a sub-critical accelerator-driven system (ADS). To understand the fuel performance, the thermophysical properties such as thermal conductivity and heat capacity are quite important. However, it is very hard to experimentally determine the physical properties of plutonium as well as americium compounds due to their handling-difficulties. Molecular dynamics (MD) would be a specific method to describe the physical properties of such materials. In the present study, we have investigated thermophysical properties of PuO2, AmO2, and their solid solutions in the temperature range from 300 to 2,500 K. The lattice parameter, compressibility, heat capacity, linear thermal expansion coefficient, and thermal conductivity were evaluated. A Morse-type potential function added to the Busing-Ida type potential was employed as the potential for interatomic interactions. The calculated lattice parameters of (Pu, Am)O2 obeyed Vegard's law, and the values increased with temperature. The heat capacities of (Pu, Am)O 2 were similar in any compositions. The thermal conductivities of (Pu, Am)O2 were lower than those of PuO2 and AmO 2, indicating that a point-defect scattering effect of phonons could be realized in the MD calculations. © 2008 Materials Research Society.

关键词： Solid solutions

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Research and Technology Trend Analysis by Big Data-Based Smart Livestock Technology: a Review

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Journal of Biosystems engineering 2021年第4期46卷 386-398页

作者： Kim, Min-Jee Mo, Changyeun Kim, Hyeon Tae Cho, Byoung-Kwan Hong, Soon-Jung Lee, Dae Hyun Shin, Chang-Seop Jang, Kyoung Je Kim, Yong-Hyeon Baek, Insuck Department of Biosystems Engineering College of Agriculture and Life Sciences Kangwon National University 1 KNU Ave. Gangwon Chuncheon24341 Korea Republic of Interdisciplinary Program in Smart Agriculture Kangwon National University 1 KNU Ave. Chuncheon24314 Korea Republic of Gyeongsangnam-do Jinju52828 Korea Republic of Department of Biosystems Machinery Engineering College of Agricultural and Life Science Chungnam National University 99 Daehak-ro Yuseong-gu Daejeon34134 Korea Republic of Korea National College of Agriculture and Fisheries 1515 Kongjwipatjwi-ro Deokjin-gu Jeollabuk-do Jeonju-si54874 Korea Republic of Department of Biosystems Engineering College of Agriculture Life & Environment Science Chungbuk National University 1 Chungdae-ro Seowon-gu Chungbuk Cheongju28644 Korea Republic of Department of Bioindustrial Machinery Engineering College of Agriculture and Life Sciences Jeonbuk National University Baekje-daero Deokjin-gu Jeollabuk-do Jeonju-si54896 Korea Republic of USDA-ARS Environmental Microbial and Food Safety Laboratory Beltsville Agricultural Research Center BeltsvilleMD20705 United States

Purpose: This study introduces the global research and technological trends related to various kinds of Information and Communications Technologies (ICTs) used and applied in the livestock industry by improving productivity via breeding, disease and optimal environment control, and smart business management. Method: Prior research data was collected using "ICT," "IoT," "information technology (IT)," "ubiquitous technology," "smart livestock," and "big data" as main keywords. Results: Most livestock farms in Korea adopt smart livestock technology that are mostly used in the 1st or 1.5th generations, while continuous developments are being carried out for technologies of the 2nd and 3rd generations. In the livestock house, camera vision, radio-frequency identification (RFID), beacon sensors, and environmental sensors are used in livestock farms and houses to collect information compiled into a database to introduce an automated system for livestock management. Conclusion: The data collected from each individual and farm can enable precise breeding and ultimately improve the productivity and efficiency of smart livestock systems. It is necessary to prepare a systematic system at the national level for data collection, ownership, and sharing to improve the productivity and efficiency of the smart livestock system. © 2021, The Korean Society for Agricultural Machinery.

关键词： environmental management

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Management of hazardous waste in Thailand: present situation and future prospects

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Journal of Material Cycles and Waste Management 2003年第1期5卷 0031-0038页

作者： H. Ozaki K. Sharma C. Phanuwan K. Fukushi C. Polprasert Department of Civil Engineering Osaka Sangyo University 3-1-1 Nakagaito Daito Osaka 574-8530 Japan Tel. +81-72-875-3001 (ext. 3718) Fax +81-72-875-5044 e-mail: ozaki@ce.osaka-sandai.ac.jp JP Urban Environmental Engineering and Management Program School of Environment Resources and Development Asian Institute of Technology Pathumthani Thailand TH Environmental Science Center The University of Tokyo Tokyo Japan JP

This paper deals with the present scenario of hazardous waste management practices in Thailand, and gives some insights into future prospects. Industrialization in Thailand has systematically increased the generation of hazardous waste. The total hazardous waste generated in 2001 was 1.65 million tons. It is estimated that over 300 million kg/year of hazardous waste is generated from nonindustrial, community sources (e.g., batteries, fluorescent lamps, cleansing chemicals, pesticides). No special facilities are available for handling these wastes. There are neither well-established systems for separation, storage, collection, and transportation, nor the effective enforcement of regulations related to hazardous wastes management generated from industrial or nonindustrial sectors. Therefore, because of a lack of treatment and disposal facilities, these wastes find their way into municipal wastewaters, public landfills, nearby dump sites, or waterways, raising serious environmental concern. Furthermore, Thailand does not have an integrated regulatory framework regarding the monitoring and management of hazardous materials and wastes. In addition to the absence of a national definition of hazardous wastes, limited funding has caused significant impediments to the effective management of hazardous waste. Thus, current waste management practices in Thailand present significant potential hazards to humans and the environment. The challenging issues of hazardous waste management in Thailand are not only related to a scarcity of financial resources (required for treatment and disposal facilities), but also to the fact that there has been no development of appropriate technology following the principles of waste minimization and sustainable development. A holistic approach to achieving effective hazardous waste management that integrates the efforts of all sectors, government, private, and community, is needed for the betterment of human health and the environment.

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2-[(Hydroxymethyl)amino]ethanol in water as a preservative: Study of formaldehyde released by Taguchi's method 5

2-[(Hydroxymethyl)amino]ethanol in water as a preservative: ...

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5th International Conference on Chemical and Bioprocess engineering, ICCBPE 2015

作者： Wisessirikul, W. Loykulnant, S. Montha, S. Fhulua, T. Prapainainar, P. Interdisciplinary Graduate Program in Advanced and Sustainable Environmental Engineering Thailand Advanced Institute of Science and Technology Tokyo Institute of Technology Kasetsart University Bangkok10900 Thailand Natural Rubber Focus Unit National Metal and Materials Technology Center NSTDA 111 Paholyothin Rd. Klong 1 Klong Luang Pathumthani12120 Thailand Environment Research Unit National Metal and Materials Technology Center NSTDA 111 Paholyothin Rd. Klong 1 Klong Luang Pathumthani12120 Thailand National Center of Excellence for Petroleum Petrochemicals and Advance Materials Department of Chemical Engineering Faculty of Engineering Kasetsart University Thailand Center of Excellence of Nanotechnology Kasetsart University Thailand

This research studied the quantity of free formaldehyde released from 2- [(hydroxymethyl)amino]ethanol (HAE) in DI water and natural rubber latex mixture using high-performance liquid chromatography (HPLC) technique. The quantity of formaldehyde retained in the solution was cross-checked by using titration technique. The investigated factors were the concentration of preservative (HAE), pH, and temperature. Taguchi's method was used to design the experiments. The number of experiments was reduced to 16 experiments from all possible experiments by orthogonal arrays (3 factors and 4 levels in each factor). Minitab program was used as a tool for statistical calculation and for finding the suitable condition for the preservative system. HPLC studies showed that higher temperature and higher concentration of the preservative influence the amount of formaldehyde released. It was found that conditions at which formaldehyde was released in the lowest amount were 1.6%w/v HAE, 4 to 40 °C, and the original pH. Nevertheless, the pH value of NR latex should be more than 10 (the suitable pH value was found to be 13). This preservative can be used to replace current preservative systems and can maintain the quality of latex for long-term storage. Use of the proposed preservative system was also shown to have reduced impact on the toxicity of the environment. © Published under licence by IOP Publishing Ltd.

关键词： Formaldehyde

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Hazard evaluation for redox system of cumene hydroperoxide mixed with inorganic alkaline solutions

Hazard evaluation for redox system of cumene hydroperoxide m...

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作者： Hou, H.-Y. Duh, Y.-S. Lee, W.-L. Shu, C.-M. Department of Occupational Safety and Health Jen-Teh Junior College of Medicine Nursing and Management 1 Jen-Teh Rd. Houlong Miaoli 35664 Taiwan Department of Occupational Safety and Health and Graduate Program Chung Shan Medical University 110 Sec.1 Jianguo N. Rd. Taichung 40201 Taiwan Process Safety and Disaster Prevention Laboratory Department of Safety Health and Environmental Engineering National Yunlin University of Science and Technology 123 University Rd. Douliou Yunlin 64002 Taiwan

In petrochemistry, dicumyl peroxide (DCPO) is used in various resins for improving physical properties, which was produced by cumene hydroperoxide (CHP) with oxidization reaction, redox reaction, and dehydration reaction. The reactant, CHP, is a typical organic hydroperoxide and has been intrinsically unstable and reactive due to its bivalent -O-O- structure which can be broken readily with bond-dissociation energy. This sequence on sensitive study aimed at the thermal hazard evaluation for the reactive and incompatible characteristics of CHP mixed with various inorganic alkaline solutions. Differential scanning calorimetry (DSC) and vent sizing package 2 (VSP2) were used to analyze the thermal hazards and runaway reaction of redox system, such as decomposition of CHP in cumene solution and CHP react with inorganic alkaline solutions, exothermic onset temperature, peak power, heat of decomposition of dynamic scanning tests, adiabatic self-heating rate, pressure rise rate, maximum temperature, maximum pressure of reaction system, etc. The results of the tests have proven helpful in establishing safe handling, storage, transportation, and disposal guidelines. © 2009 Akadémiai Kiadó, Budapest.

关键词： Redox reactions

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Novel Dopamine-Derived Carbon Modified Fe-Based Metal-Organic Framework Enhanced Aptasensor Rendering Ultrasensitive Electrochemical Detection of Oxytetracycline

SSRN

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SSRN 2024年

作者： Song, Jialing Fan, Xiaoxuan Ee, Liang Ying Lin, Xuanhao Li, Sam Fong Yau Huang, Manhong Singapore Donghua University China Shanghai University College of Science Department of Chemistry International Joint Laboratory Catalyst Chemistry Shanghai200444 China College of Environmental Science and Engineering State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry Donghua University Shanghai201620 China National University of Singapore Department of Chemistry 3 Science Drive 3 Singapore117543 Singapore Advanced Membranes and Porous Materials Center Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia Chemical Engineering Program Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia National University of Singapore Environmental Research Institute T Lab Building 5A Engineering Drive 1 Singapore117411 Singapore

In the present work, an aptasensor with dual binding sites based on Au NPs modified with self-polymerized polydopamine (PDA) and Fe-MOF is successfully constructed. In terms of standard electron transfer, the cyclic voltammetry (CV) analysis showcases a rate constant (ks) of 96.0 s-1, signifying an exceptional electron transfer rate of oxytetracycline at the sensor interface of Apt/Au@PDA@NH2-MIL-101(Fe)/GCE. Further deepening the investigation into electrochemical kinetics using chronoamperometry (CA), we investigated the electrocatalytic parameters (Kcat) of Au@PDA@NH2-MIL-101(Fe) in relation to oxytetracycline. The results divulged an impressive average Kcat value of 3.06×105 M-1 S-1. This evidence robustly suggests the superior electrocatalytic activity of Au@PDA@NH2-MIL-101(Fe) when it comes to oxytetracycline oxidation. A custom-designed portable rapid detection platform was developed, achieving detection limits of 6.88 nM under static water flow conditions and 5.56 nM under dynamic conditions. Remarkably, the self-polymerization of PDA on Au NPs not only refines their size but also boosts their interaction with biomolecules, thereby promising excellent biocompatibility. Moreover, the abundance of -COOH groups and unsaturated Fe3+ sites on the NH2-MIL-101(Fe) surface furnishes a considerable number of grafting sites for the aptamer. More importantly, the redox interplay between Au@PDA and NH2-MIL-101(Fe) accelerates electron movement, thus amplifying the electrochemical signal and the detection sensitivity for oxytetracycline. © 2024, The Authors. All rights reserved.

关键词： Rate constants

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Bearing strength of glass fiber reinforced glulam bolted connection

Journal of the Korean Wood Science and Technology

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Journal of the Korean Wood science and Technology 2015年第5期43卷 652-660页

作者： Kim, Keon-Ho Hong, Soon-Il Division of Wood Engineering Department of Forest Products Korea Forest Research Institute 57 Hoegiro Dongdaemun-guSeoul130-712 Korea Republic of Program of Forest Biomaterials Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University 1 Kangwondaehak-gil Chuncheon-siGangwon-do200-701 Korea Republic of

To study the bearing characteristics of glass fiber reinforced glulam for structural design, bearing strength tests were performed. Bearing loads were applied in the direction parallel to the grains, and the holes were prepared in such a way that the bolts would bear and support all the layers. The yield bearing strengths of the glass fiber reinforced glulam were found to be similar to those of the non-reinforced glulam, and were almost constant regardless of increases in bolt diameter. The ratio of the experimental yield bearing strength to the estimated bearing strength according to the suggested equation of the Korea Building Code and National Design Specification was 0.91∼1.03. For the non-reinforced glulam and the sheet glass fiber reinforced plastic glulam, the maximum bearing load was measured according to the splitting fracture of specimens under bolt. The textile glass fiber reinforced glulam underwent only an embedding failure caused by the bearing load. The failure mode of reinforced glulam according to bearing load will influence the failure behavior of bolted connection, and estimating the shear yield strength of the bolted connection of the reinforced glulam is necessary, not only by using the bearing strength characteristics but also using the fracture toughness of the reinforced glulam.

关键词： Bolts

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