Search Results 1-20 of 474

  • Redox cycling of 9,10-phenanthrenequinone activates epidermal growth factor receptor signaling through <i>S</i>-oxidation of protein tyrosine phosphatase 1B

    Luong Nho Cong , Abiko Yumi , Shibata Takahiro , Uchida Koji , Warabi Eiji , Suzuki Midori , Noguchi Takuya , Matsuzawa Atsushi , Kumagai Yoshito

    … <p>9,10-Phenanthrenequinone (9,10-PQ) is a polycyclic aromatic hydrocarbon quinone contaminated in diesel exhaust particles and particulate matter 2.5. …

    The Journal of Toxicological Sciences 45(6), 349-363, 2020


  • The development of nano-sized PM filtration for a diesel engine oil using coagulation by an alternating electric field  [in Japanese]

    TOKOROYAMA Takayuki , SHIBASAWA Hotaka , UMEHARA Noritsugu

    … <p>In general, a diesel engine does not have ignition system and it can ignite by self-ignition. … However, diesel engines emit more particle matter (PM) rather than normal gasoline engine, so that diesel engines should have diesel particulate filter (DPF) to accumulate them even if it is in not only a exhaust gas but also an engine oil region. …

    Transactions of the JSME (in Japanese) 86(884), 20-00016-20-00016, 2020


  • Instrumentation Challenges for Measuring Sub-23 nm Particle Number Emissions from Transportation Sources

    Nakamura Kazuki , Rodriguez Waldemar Linares , Dardiotis Christos , Mamakos Athanasios

    … Particle number exhaust emissions from diesel – and recently – from gasoline direct injection engines have already been regulated for particle sizes larger than 23 nm. … However, interests have been extended to different applications and also to particles smaller than 23 nm. … This paper focuses on the associated challenges of particle number measurement instruments in terms of sampling and diluting the emissions as well as of counting the sub-23 nm particles. …

    International Journal of Automotive Engineering 10(2), 205-212, 2019


  • Development of Electrostatic Cyclone Precipitator for Marine Diesel Engines - PM Reduction with Vertical Type ESP-cyclone System in Exhaust Gas from Two-Stroke Marine Diesel Engine  [in Japanese]

    Sasaki Hidetsugu , Tsukamoto Tatsuro , Furugen Munekatsu , Makino Tadashi

    … <p>  Particulate matter (PM) produced from diesel engines has several serious effects on human health and the environment. … Then marine diesel engines are strongly required to reduce PM emissions in exhaust gas. … However, the diesel particulate filter (DPF) has yet to be used in a practical manner for marine diesel engines. …

    Marine Engineering 54(3), 444-450, 2019


  • Visualization and PIV Analysis of Re-entrainment Phenomenon in Electrostatic Precipitator  [in Japanese]

    EHARA Yoshiyasu , MIYASHITA Hirotaka , INUI Takashi , AOKI Yukio , NISHIDA Hideyuki

    … The particulate matters (PMs) emitted from diesel engine exhaust during the combustion process have low resistivity and extremely small in the submicron range. … An after-treatment system using an electrostatic precipitator (ESP) for removing PM emissions from a diesel engine has been studied. … However, the collection of low resistive particles is difficult by the conventional ESPs. …

    The Proceedings of the Symposium on Environmental Engineering 2018.28(0), 318, 2018


  • Health Effects of PM<sub>2.5</sub>  [in Japanese]

    Li Ying-Ji

    … (particles less than 2.5 micrometers in diameter) pollution occurs in Asian countries due to increasing emissions of air pollutants caused by the countries' …

    Nihon Ika Daigaku Igakkai Zasshi 14(4), 152-156, 2018

    J-STAGE  Ichushi Web 

  • Removing Diesel Exhaust Particulate with Parallel-plate Hole-type Electrostatic Precipitator  [in Japanese]

    Miyashita Hirotaka , Ehara Yoshiyasu , Suzuki Shohei , Inui Takashi , Aoki Yukio , Nishida Hideyuki

    … <p>  An electrostatic precipitator (ESP) has such advantages as high collection efficiency of high concentration particles and low pressure loss. … In the case of large particles, the collection efficiency decreased when the discharge current increased. …

    Marine Engineering 53(5), 737-742, 2018


  • Development of Numerical Simulation on Soot Deposition Phenomenon on EGR Coolers by Euler-Lagrange Coupling  [in Japanese]

    Hara Junichiro , Iwasaki Mitsuru , Matsudaira Norimitsu , Miyake Hiroshi , Yamamoto Makoto , Fukushima Naoya , Mamori Hiroya

    … The authors have developed a new numerical analysis method based on Euler-Lagrange Coupling to clarify the soot deposition phenomenon on Exhaust Gas Recirculation (referred to as EGR) cooler for diesel engines. … Cooled EGR system with a heat exchanger (EGR cooler) for diesel engines has been used for emission improvement for a long time. …

    Transactions of Society of Automotive Engineers of Japan 49(5), 1032-1037, 2018


  • Study on Characteristics of Particulate Matter from 4-Stroke Marine Diesel Engine by Hot Dilution Method

    Sasaki Hidetsugu , Tsukamoto Tatsuro

    … <p>  The harmful exhaust emissions from marine diesel engines are NOx, SOx, and PM (Particulate Matter). … Then marine diesel engines are strongly required to reduce the PM emission in the exhaust gas. … However, the actual state of the PM emission from marine diesel engines has been not entirely cleared. …

    Marine Engineering 53(3), 398-403, 2018


  • Barrier dysfunction in the nasal allergy

    Fukuoka Ayumi , Yoshimoto Tomohiro

    … Recently, we reported that diesel exhaust particles (DEP), the main component of particulate patter 2.5, exacerbated allergic rhinitis (AR) in a mouse model through TJ disruption. …

    Allergology International 67(1), 18-23, 2018

    J-STAGE  Ichushi Web 

  • Evaluation of neurotoxicity by air pollutant exposure using animal model  [in Japanese]

    SHWE Tin Tin WIN , FUJITANI Yuji , HIRANO Seishiro

    … Previously, our research group has shown that the effects of primary particles such as carbon black nanoparticles and nanoparticle-rich diesel exhaust on brain inflammatory mediators, neurotransmitter system, memory function-related gene expression and learning performance in adult mice. …

    Annual Meeting of the Japanese Society of Toxicology 44.1(0), S14-4, 2017


  • Reactive oxygen species produced from 9,10-phenanthrenequinone activate epidermal growth factor receptor signaling through oxidative modification of protein tyrosine phosphatase 1B  [in Japanese]

    LUONG Nho Cong , ABIKO Yumi , KUMAGAI Yoshito

    … 9,10-Phenanthrenequinone (9,10-PQ), contaminated in diesel exhaust particles, is a ROS producer through the redox cycling by interacting with electron donors in cells. …

    Annual Meeting of the Japanese Society of Toxicology 44.1(0), P-277, 2017


  • <i>In utero</i> exposure to diesel exhaust particles induces anxiogenic effects on male offspring via chronic activation of serotonergic neuron in dorsal raphe nucleus  [in Japanese]

    YOKOTA Satoshi , OSHIO Shigeru , TAKEDA Ken

    【背景・目的】我々は、胎仔期DEP 曝露が雄性産仔の衝動性や学習記憶に影響を及ぼすことを明らかにしてきたが、不安情動性に及ぼす影響については検討してこなかった。本研究では、胎仔期DEP 曝露が出生仔の不安様行動に及ぼす影響について検討することを目的とした。<br>【方法】妊娠 ICR 系マウスに対して DEP を、皮下投与により曝露 (DEP 1 mg / kg body weight …

    Annual Meeting of the Japanese Society of Toxicology 44.1(0), P-37, 2017


  • Effects of diesel exhaust-derived secondary organic aerosol (SOA) on oocytes: potential risks to meiotic maturation  [in Japanese]

    UDAGAWA Osamu , FURUYAMA Akiko , IMAI Koji , FUJITANI Yuji , HIRANO Seishiro

    … ディーゼルエンジン由来排気粒子(Diesel Exhaust Particles, DEP)の大部分を占めるPM2.5中には二次的に生成する様々な物質が含まれているが、その中でも揮発性有機物質がオゾンや光反応によって酸化されることにより生成する二次生成有機エアロゾル(Secondary Organic Aerosol, SOA)は他の粒子状物質に比べ生体との反応性が高いことが予想されている。 …

    Annual Meeting of the Japanese Society of Toxicology 44.1(0), O-19, 2017


  • Detailed Characterization of Particulate Matter in Alcohol Exhaust Emissions

    Shamun Sam , Novakovic Maja , B. Malmborg Vilhelm , Preger Calle , Shen Mengqin , E. Messing Maria , Pagels Joakim , Tunér Martin , Tunestål Per

    … Methanol and ethanol have a very short carbon chain, and form less soot/particulate matter (PM) during combustion compared to diesel fuel. … This study analyzes and compares the characteristics of PM emissions from methanol, ethanol and diesel in terms of soot mass concentration, number concentration and particle size distribution in one cylinder of a six cylinder Scania D13 heavy duty (HD) engine under two operating loads; …

    The Proceedings of the International symposium on diagnostics and modeling of combustion in internal combustion engines 2017.9(0), B304, 2017


  • Effect of Exhaust Gas Recirculation on physiochemical characteristics of Diesel Soot

    Rohani Behzad , Bae Choongsik

    … <p>The physiochemical characteristics of soot particles such as oxidative reactivity and volatile organic fraction (VOF) are of importance with regard to performance of diesel after-treatment systems and the health hazards. … In this research, a single cylinder heavy duty diesel engine is used to investigate the effects of various multiple injection strategies and EGR application on diesel soot under conventional diesel regime. …

    The Proceedings of the International symposium on diagnostics and modeling of combustion in internal combustion engines 2017.9(0), B302, 2017


  • Removing Diesel Exhaust Particulate with Hole-type Electrostatic Precipitator  [in Japanese]

    Miyashita Hirotaka , Ehara Yoshiyasu , Inui Takashi , Aoki Yukio

    … <p>Various PMs are emitted from marine diesel exhaust gas. … The ionic wind guides particles into the hole. … The highest collection efficiency for small particles was achieved with 22.6% of the aperture rate. …

    Marine Engineering 52(6), 788-793, 2017


  • Neurotoxicity Assessment of Secondary Organic Aerosols by Intranasal and Inhalation Exposure in Mice  [in Japanese]

    WIN-SHWE Tin-Tin , FUJITANI Yuji , HIRANO Seishiro

    … Ambient particulate matter (PM) consists of primary particles emitted directly from the source, and secondary particles formed by photo-oxidation reactions of volatile organic compounds and gases in the atmosphere, which are known as secondary organic aerosols (SOAs). … Diesel exhaust (DE) is a major source of PM and a possible precursor of SOAs in the urban atmosphere. …

    Earozoru Kenkyu 32(3), 169-175, 2017


  • Environmental pollution and allergies

    Takano Hirohisa , Inoue Ken-ichiro

    … For example, diesel exhaust particles (DEPs), which are an agglomeration of particles and a wide array of chemical substances, aggravate asthma, primarily due to the principle organic chemical components of DEPs. … It has also become evident that extremely small nanomaterials and Asian sand dust particles can enhance allergic inflammation. …

    Journal of Toxicologic Pathology 30(3), 193-199, 2017

    IR  J-STAGE  Ichushi Web 

  • Performance Evaluation of Black Carbon Measurements with a Soot Particle-AMS  [in Japanese]

    FUJITANI Yuji , HIKIDA Toshihide , SHIMONO Akio

    … In this study, a SP-AMS was used to measure the rBC in both diesel exhaust and aerosols at a traffic intersection. … We also found that the spectrum of carbon cluster ions in the particles emitted from a direct–ignition gasoline vehicle was different from that of diesel exhaust particles. … may be a good indicator for distinguishing these two types of particles in the environment. …

    Earozoru Kenkyu 32(1), 20-28, 2017


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