Showing 741 - 760 results of 849 for search '"combustion"', query time: 0.04s Refine Results
  1. 741

    Composition Characteristics and Potential Regions of PM2.5 during Winter Haze Pollution in Typical Industrial Areas, NW-China by Liyao Guo, Chao Gu, Kaiyuan Dong, Shengju Ou, Xueyan Zhao, Xinhua Wang, Zhensen Zheng, Wen Yang

    Published 2024-04-01
    “…The Positive Matrix Factorization (PMF) analysis shows that secondary particulate matter (47%), coal combustion (19%), fugitive dust (14%), industrial sources (10%) and vehicular emissions (10%) are identified as the major emission sources during winter in the K-D-W region. …”
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  2. 742

    Influence of alcohol blend fuels on performance and noise emission in spark ignition engine by Ali Murtaza Ansari, Liaquat Ali Memon, Faheem Ahmed Solangi, Mamdouh T. Ghannam, Mohamed Y.E. Selim

    Published 2025-03-01
    “…The air-fuel equivalency ratio also rises to an amazing number because to the leaning effect of the ethanol, which makes the combustion nearly stoichiometric.…”
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  3. 743

    Validation of SOC Estimation Using OC and EC Concentration in PM2.5 Measured at Seoul by Ha Young Yoo, Ki Ae Kim, Yong Pyo Kim, Chang Hoon Jung, Hye Jung Shin, Kwang Ju Moon, Seung Myung Park, Ji Yi Lee

    Published 2022-02-01
    “…The EC tracer method is a method of estimating the SOC value from calculating the POC by determining (OC/EC)pri which is the ratio of the measured values of OC and EC from the primary combustion source. In this study, three different approaches were applied to OC and EC concentrations in PM2.5 measured at Seoul for determining (OC/EC)pri: 1) the minimum value of OC/EC ratio during the measurement period; 2) regression analysis of OC vs. …”
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  4. 744

    Characteristics of Chemical Composition and Particle Size Distribution from Real Coal-fired Circulating Fluidised Bed (CFB) Boiler by Xin Du, Jianhui Wu, Yingze Tian, Yufen Zhang, Baoshuang Liu, Yinchang Feng

    Published 2021-01-01
    “…Abstract The chemical component (element, ion, and carbonaceous aerosols) behaviour in particle size distributions (PSDs) was studied by determining the particulate matter (PM) emitted from the circulating fluidised-bed (CFB) combustion flue gas. Four CFB coal-fired boilers were employed in power plants. …”
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  5. 745

    Overview of results in the application of flywheel hybrid transportation systems by Tarraf Mokhammad, V. V. Gayevskiy, Deeb Mukhammad

    Published 2024-12-01
    “…Among several typical energy storage methods, that flywheel energy storage has advantages such as high instantaneous power, high-performance and long service life, making it perfect secondary energy storage technology for traditional internal combustion engine vehicles. Although some progress has been made in the applied research of flywheel energy storage technology, there are no detailed studies at home and abroad that summarize its application in the vehicle applications. …”
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  6. 746

    Characteristics and Health Risks of PM2.5-bound Metals in a Central City of Northern China: A One-year Observation Study by Jinhe Wang, Shuang Zhang, Xiaoguo Qiu, Kai Li, Jiarong Li, Yangang Ren, Chao Zhu, Xi Zhang

    Published 2023-12-01
    “…Four sources could be extracted using the positive matrix factorization (PMF) model, namely resuspended dust (51.9%), oil combustion (19.9%), factories (16.5%), and traffic emissions (11.7%). …”
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  7. 747

    Fast and Slow Roasting of Alcohol- and Honey-infused Coffee Blends: A Comparative Study of PAH and N-PAH Emissions by Hsin-Chieh Kung, Chung-Hsien Hung, Kun-Hui Lin, Bo-Wun Huang, Nicholas Kiprotich Cheruiyot, Guo-Ping Chang-Chien

    Published 2023-12-01
    “…The PAH diagnostic ratios indicated that the source of PAHs in green coffee was pyrogenic in nature and more specifically, petroleum combustion. Finally, the emission factors for the fast and slow roasting of green coffee were 1.36 mg kg−1 of coffee (7.49 µg BaP-TEQ kg−1) and 0.483 mg kg−1 (1.35 µg BaP-TEQ kg−1), respectively. …”
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  8. 748

    Particle Size-Dependent Monthly Variation of Pollution Load, Ecological Risk, and Sources of Heavy Metals in Road Dust in Beijing, China by Cong Men, Donghui Li, Yunqi Jing, Ke Xiong, Jiayao Liu, Shikun Cheng, Zifu Li

    Published 2025-01-01
    “…Wavelet analysis indicated that traffic exhaust showed periodicities of 5–8 and 10–13 months. Fuel combustion displayed the strongest periodicity of 12–15 months, peaking in winter.…”
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  9. 749

    Multi-Classification Using YOLOv11 and Hybrid YOLO11n-MobileNet Models: A Fire Classes Case Study by Eman H. Alkhammash

    Published 2025-01-01
    “…Fires are classified into five types: A, B, C, D, and F/K, according to the components involved in combustion. Recognizing fire classes is critical, since each kind demands a unique suppression approach. …”
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  10. 750

    Ambient PM2.5 Temporal Variation and Source Apportionment in Mbarara, Uganda by Silver Onyango, Crystal M. North, Hatem A. Ellaithy, Paul Tumwesigye, Choong-Min Kang, Vasileios Matthaios, Martin Mukama, Nuriat Nambogo, J. Mikhail Wolfson, Stephen Ferguson, Stephen Asiimwe, Lynn Atuyambe, Data Santorino, David C. Christiani, Petros Koutrakis

    Published 2024-01-01
    “…In Mbarara, the six main ambient PM2.5 sources identified included (in order of abundance): traffic-related, biomass and secondary aerosols, industry and metallurgy, heavy oil and fuel combustion, fine soil, and salt aerosol. Our findings confirm that air quality in southwestern Uganda is unsafe and that mitigation efforts are urgently needed. …”
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  11. 751
  12. 752

    Experimental Study of Single Expansion Ramp Nozzle Performance Using Pitot Pressure and Static Pressure Measurements by Sergio Nicolas Pachón Laitón, João Felipe de Araujo Martos, Israel da Silveira Rego, George Santos Marinho, Paulo Gilberto de Paula Toro

    Published 2019-01-01
    “…Pitot and pressure measurements inside the combustion chamber show nonuniform flow condition as expected due to side wall compression and boundary layer. …”
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  13. 753

    Characteristics and Source-specific Health Risks of Ambient PM2.5-bound PAHs in an Urban City of Northern Taiwan by Yu-Chieh Ting, Chun-Hung Ku, Yu-Xuan Zou, Kai-Hsien Chi, Jhy-Charm Soo, Chin-Yu Hsu, Yu-Cheng Chen

    Published 2023-08-01
    “…Traffic emissions (31.3%) were identified as the predominant contributor to ambient PM2.5-bound PAHs, followed by industrial emissions (29.2%), evaporated/unburned oil (22.3%), and biomass/coal combustion (17.1%). Apart from the local sources, PSCF-derived results showed that emissions from industrial activities in northeast China and shipping around the Yellow Sea and East China Sea could affect the PAHs in the study area. …”
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  14. 754

    The Impact of Lockdown on Air Quality in Pakistan during the COVID-19 Pandemic Inferred from the Multi-sensor Remote Sensed Data by Rehana Khan, Kanike Raghavendra Kumar, Tianliang Zhao

    Published 2021-02-01
    “…This is attributed to the limited transportation and control action plans of industrial activities including combustion sources taken by the Government of Pakistan for the DLP-2020 phase. …”
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  15. 755

    Spatiotemporal Variations of Particulate Matter and their Association with Criteria Pollutants and Meteorology in Malaysia by Anis Asma Ahmad Mohtar, Mohd Talib Latif, Doreena Dominick, Maggie Chel Gee Ooi, Azliyana Azhari, Nor Hafizah Baharudin, Norfazrin Mohd Hanif, Jing Xiang Chung, Liew Juneng

    Published 2022-07-01
    “…The PCA analysis indicates that the major sources leading to the formation of particulate matter are from the contribution of secondary aerosols and combustion-related sources. The ratio of PM2.5 to PM10 ranged between 0.51 and 0.76 nationwide with the highest mean recorded in the central region (0.72). …”
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  16. 756

    Impacto sobre el cambio climático del ciclo de vida de las tarimas de madera elaboradas en la región Huetar Norte de Costa Rica by John Solano Salmerón, William Fonseca González, Sebastián Ugalde Alfaro, Federico Alice Guier

    Published 2021-01-01
    “…En ambos casos, la combustión de diésel asociada al transporte de madera rolliza fue la etapa más intensa en emisiones, libera cerca de 1.61 kg CO2-eq tarima-1 y 43.22 kg CO2-eq m-3. …”
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  17. 757

    Harnessing the Dual photocatalytic and electrochemical capabilities of pure and Ni-Doped MgO nanostructures for diclofenac detection by V. Bhoomika, K.T. Monalisa, Syed Khasim, T.M. Sharanakuamr, C.R. Ravikumar, N. Basavaraju, T.R. Shashi Shekhar, H.C. Ananda Murthy, K.U. Aravind

    Published 2025-01-01
    “…A pure MgO and MgO doped with 2, 4, 6, and 8 mol% of NiOnanoparticles (NPs)were prepared using the solution combustion technique.Several spectral techniques were used to characterize the synthesizedNPs.The XRD analysis revealed theaverage particle size of theMgO-infused NiO nanomaterialwas ranging between 16.28 and 71.26 nm.A distinct plate-like or slice-like quality to the morphology was observed during the SEM analysis. …”
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  18. 758

    Particulate Matter During Food Preparation on a Barbecue: A Case Study of an Electric Barbecue by Jan Stefan Bihałowicz, Artur Badyda, Wioletta Rogula-Kozłowska, Kamila Widziewicz-Rzońca, Patrycja Rogula-Kopiec, Dmytro Chyzhykov, Grzegorz Majewski, Mariusz Pecio

    Published 2025-01-01
    “…Barbecuing represents one of the few sources of combustion particulates during the summer, a period which is otherwise characterised by a lack of heating. …”
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  19. 759

    Heat-not-burn technology affects plasma testosterone levels and markers of inflammation, oxidative stress in the testes of rats by Silvia Granata, Camilla Morosini, Maria Chiara Valerii, Ivan Fagiolino, Stefano Sangiorgi, Severino Ghini, Enzo Spisni, Fabio Vivarelli, Lucy C. Fairclough, Moreno Paolini, Donatella Canistro

    Published 2025-01-01
    “…Using heat-not-burn (HnB) technology, these devices heat tobacco avoiding complete combustion. Although the levels of toxicants in the mainstream are significantly lower than those observed in tobacco smoke, some recent studies have raised concerns about potential health risks associated with their use, particularly regarding their effects on male gonadal function, which remain largely unexplored.MethodsAdult male Sprague-Dawley rats were exposed, whole body, 5 days/week for 4 weeks to HnB mainstream.ResultsThe expression of the cell cycle regulators Bax/Bcl-2 ratio is not affected, along with no changes in p-38. …”
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  20. 760

    Incremental Lifetime Cancer Risk of PAHs in PM2.5 via Local Emissions and Long-Range Transport during Winter by Shahzada Amani Room, Chia En Lin, Shih Yu Pan, Ta Chih Hsiao, Charles C.-K. Chou, Kai Hsien Chi

    Published 2023-02-01
    “…Our results indicated that vehicle emissions (gasoline engines: 20.8%, diesel engines: 23.3%) and coal combustion (55.9%) were the major sources of PAHs in the urban site, with higher levels in LP than in LRT. …”
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