Search Results 1-20 of 222

  • Outline and research trend of electrostatic precipitator and particulate removal technology for household air purifier  [in Japanese]

    NAGAYOSHI Kentaro

    居住空間の空気質改善に家庭用空気清浄機が利用されている。 集じん, 脱臭, 除菌などの機能の中心となるのが空気中に浮遊している微粒子の除去技術である。 販売されている機器の大半はフィルタろ過式である。 ろ過の捕集機構は, 慣性力, さえぎり, 拡散力, 重力, 静電気力の作用によって行われる。 慣性力などの機械的捕集は大粒径に, 静電気捕集は小粒径に有利である。 家庭用空気清浄機では圧損を低くしな …

    Indoor Environment 23(2), 151-160, 2020

    J-STAGE 

  • Variation of Radiation Dose in Tunnels

    NISHIKAWA Yukari , KOBAYASHI Jun , SUGIYAMA Hideo

    … In this study, we measured the radiation dose, dust, and wind speed for three tunnels (A, B, C), which penetrated the northern and southern regions in Kochi Prefecture, and attempted to specifically consider the factors for variations in the radiation dose. … In addition to the radiation that came from soil to form mountains, it is believed that sediments present in leaked water and dust scattered in the air also contributed to this radiation source.</p> …

    BUNSEKI KAGAKU 69(1.2), 41-44, 2020

    J-STAGE  Ichushi Web 

  • Simultaneous Investigation of Air Pollution at Two West Japan Sites  [in Japanese]

    HONDA Naoko , ABE Maho , COULIBALY Souleymane , SERA Nobuyuki , ORO Tadashi , MATSUMOTO Takahiro , WATANABE Tetsushi

    … <p>In this study, as a result of having investigated air pollutants including the mutagenic/carcinogenic substances at two sites (Dazaifu and Yurihama) simultaneously, it was suggested that Asian dust was found even on the day on which it was not announced by the Meteorological Agency, and transboundary pollution by the artificial origin occurred with or without Asian dust. …

    Journal of Environmental Chemistry 30(0), 1-9, 2020

    J-STAGE 

  • Observation reports of acid rain collected on Mt. Tateyama (2018)  [in Japanese]

    朴木 英治 , 渡辺 幸一

    立山有料道路沿いの桂台(標高660 m)~室堂平(標高2450 m)までの10カ所と,科学博物館屋上の合計11カ所で酸性雨調査を継続している.2018年の観測結果では,降水量は観測点標高が高くなるにつれて増加した(高度効果).硝酸イオンでは観測点標高が高くなるにつれて濃度が低下する現象(高度効果)がどの月にも見られた.これらに対して,非海塩性硫酸イオンでは標高が高くなるにつて濃度が増加する現象(高 …

    富山市科学博物館研究報告 = Bulletin of the Toyama Science Museum (43), 47-51, 2019-07-01

    IR 

  • Relationship of Asian Dust Events with Atmospheric Endotoxin and Protein Levels in Sasebo and Kyoto, Japan, in Spring

    Khan Mohammad Shahriar , Deguchi Yuya , Matsumoto Takahiro , Nagaoka Hiroaki , Yamagishi Nobuyuki , Wakabayashi Keiji , Watanabe Tetsushi

    … <p>Asian dust events are caused by dust storms originating from deserts in Mongolia and northern China, and these events are observed in Japan, mainly in spring. … To explore the effect of Asian dust events on atmospheric endotoxin and protein levels, we collected the total suspended particles (TSP) in the spring months (March, April, and May) of 2015 in Sasebo and Kyoto, Japan, and assessed the levels of biological elements at both locations. …

    Biological and Pharmaceutical Bulletin 42(10), 1713-1719, 2019

    J-STAGE  Ichushi Web 

  • PM<sub>2.5</sub>, PM<sub>10</sub>, TSP and heavy metals in house dust collected from evacuation centers in Miyagi Prefecture at the time of the Great East Japan Earthquake  [in Japanese]

    SUZUKI Go , NAKAJIMA Daisuke , NAKAYAMA Shoji , SHIRAISHI Fujio , TAMURA Kenji , TAKIGAMI Hidetaka , NITTA Hiroshi

    東日本大震災は, 2011年3月11日に発生した東北地方太平洋沖地震による災害であり, 海岸線に押し寄せた津波によって甚大な被害をもたらした。津波被災地域の避難所等の居住区では, 津波堆積物等由来の飛散粉じんによる呼吸器疾患等の健康被害が懸念された。本調査では, 宮城県と連携して, 同年5月~9月にかけて, 津波被災地域の避難所5カ所と高等学校1カ所の室内浮遊粉じん(PM<sub>2. …

    Indoor Environment 22(1), 35-43, 2019

    J-STAGE  Ichushi Web 

  • Investigation of the Characteristics of Particulate Matter Suspended in a Subway Station Platform  [in Japanese]

    Okuda Tomoaki , Sakaide Masanobu , Fujioka Kentaro , Tabata Ryoya , Kurosawa Keiichi , Nomura Yuki , Iwata Ayumi , Fujiwara Motoi

    <p>可能な限り多数の測定装置を同時に利用することで、閉鎖的環境の代表例である地下鉄構内の空気中粒子状物質の詳細な特性調査を行った。総粒子個数濃度はCPC、ナノ粒子側粒径分布はSMPS、ミクロン粒子側粒径分布はAPS、ミクロン粒子側粒子個数濃度はOPC、粒子状物質の帯電状態は自作の帯電粒子測定装置K-MACS、PM<sub>2.5</sub>濃度はポータブルPM …

    Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi 54(1), 28-33, 2019

    J-STAGE  Ichushi Web 

  • Analysis of roadside air pollution in Osaka City using biomonitoring method  [in Japanese]

    Mihara Yukie , Sera Koichiro , Murashige Haruyuki , Moriguchi Kaname , Shimadera Hikari , Matsuo Tomohito , Kondo Akira , Matsui Toshihiko , Harai Nobuaki , Shigeyoshi Miwa

    … 採取地点近傍の自排局におけるSPM (Suspended Particulate Matter) とバイオモニタリング結果の元素質量比は、粒子径の違いや葉からの脱離しやすさによりほとんど一致しなかった。 …

    Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi 53(3), 79-87, 2018

    J-STAGE  Ichushi Web 

  • Thirdhand smoke:another passive smoking problem  [in Japanese]

    NOGUCHI Miyuki , SUZUKI Yoshihiro , YAMASAKI Akihiro

    … THSは4つのR,<u>R</u>emain残留,<u>R</u>eaction反応,<u>R</u>e-emit再放散,<u>R</u>e-suspended再浮遊によって特徴付けられる。 …

    Indoor Environment 21(1), 51-60, 2018

    J-STAGE  Ichushi Web 

  • ANALYSIS OF WHEAT ALLERGEN DISPERSED IN AIR BY THE ACTION OF THREE TYPES OF FLOUR SIFTER  [in Japanese]

    Hashimoto Hiroyuki , Yoshimitsu Masato , Kiyota Kyohei

    <p>【背景・目的】食物アレルギーの原因食品とされる小麦粉は,その飛散性のため,ふるい操作により他の食品へ意図せず混入する可能性がある.今回,小麦粉の飛散性に着目し,飛散した小麦アレルゲンの混入防止に役立つ知見を得ることを目的とした.</p><p>【方法】3種類の粉ふるいを用い,飛散した小麦粉の軌跡や速度ベクトルを測定し,飛散動態を解析した.また,シャーレ-イム …

    Japanese Journal of Allergology 66(3), 209-221, 2017

    J-STAGE  Ichushi Web 

  • Risk of Dust Explosions and Safety Measures for Them  [in Japanese]

    DOBASHI Ritsu

    <p>粉じん爆発の危険性とその対策について概説した。可燃性粉じんは, 空気中に分散されてある条件が揃うと粉じん爆発を起こす危険性がある。粉じんは固体であるので, ガス爆発のような完全な予混合燃焼が起こるわけではいないが, 高速の火炎伝ぱが発生し爆発現象となる。粉じん爆発で起こっているのは燃焼現象であるため, 粉じん爆発発生には燃焼の3要素と呼ばれる, ①粉じん雲(燃料), ②着火源, …

    THE MICROMERITICS 61(0), 55-61, 2017

    J-STAGE 

  • Radiation heat transfer properties in hot model of clinker particle  [in Japanese]

    ITAYA Yoshinori , KOBAYASHI Nobusuke , INUKAI Shunsuke , NAGATA Hirotaka , SHIMA Hirokazu

    … Radiation thermometers may be the most appropriate method, but the existence of dust suspended in the space in the furnace inhibits thermometers from measuring accuratly the temperature as the radiation emitted on the clinker is influenced during propergating to the senser due to absorption and scattering in the dust. … In this study, the radiation properties of clinker dust under a high temperature were spectroscopically measured with a hot model. …

    The Proceedings of the Symposium on Environmental Engineering 2017.27(0), 314, 2017

    J-STAGE 

  • Survey on suspended dust concentration as an indicator of infection control and countermeasures during a hospital ward renovation  [in Japanese]

    MONJI Masayoshi , FUJIMURA Shinobu , KOBAYASHI Kenji , MIYAZAKI Takashi

    <p>建物の改修や解体時には,アスペルギルス属や他の真菌の胞子を含んだ浮遊粉塵が発生し,免疫力の低下している患者ではアスペルギルス属による院内感染が問題となることが知られている.</p><p>病棟改修工事期間中,主として浮遊粉塵濃度の測定結果に基づいて感染防止対策を行った.院内の浮遊粉塵濃度は大気中の浮遊粉塵(浮遊粒子状物質:SPM)の影響を受けたが,患者等病院 …

    Japanese Journal of Infection Prevention and Control 32(2), 101-107, 2017

    J-STAGE  Ichushi Web 

  • Effect of Asian dust on pulmonary function in adult asthma patients in western Japan: A panel study

    Watanabe Masanari , Ikeda Toshikazu , Tokuyasu Hirokazu , Konishi Tatsuya , Yamasaki Akira , Igishi Tadashi , Shimizu Eiji , Noma Hisashi , Kurai Jun , Sano Hiroyuki , Mikami Masaaki , Yamamoto Hiroyuki , Ueda Yasuto , Touge Hirokazu , Fujii Yoshihiro

    … Background: Asian dust (AD) has become a major health concern. … A linear mixed model was used to estimate the association of PEFwith sand dust particles detected by LIDAR.Results: Increases in the interquartile range of AD particles (0.018 km<sup>-1</sup>) led to changes in PEF of -0.42 L/min (95% confidence interval [CI], -0.85 to 0.01). … in suspended particulatematter and 6.9 μg/m<sup>3</sup> …

    Allergology International 65(2), 147-152, 2016

    J-STAGE 

  • Association between pulmonary function and daily levels of sand dust particles assessed by light detection and ranging in schoolchildren in western Japan: A panel study

    Watanabe Masanari , Noma Hisashi , Kurai Jun , Kato Kazuhiro , Sano Hiroyuki , Tatsukawa Toshiyuki , Nakazaki Hirofumi , Yamasaki Akira , Shimizu Eiji

    … Background: An important aspect of sand dust emissions in association with respiratory disorders is the quantity of particulate matter. … Light detection and ranging is used to monitor sand dust particles originating in East Asian deserts and distinguish them from air pollution aerosols. …

    Allergology International 65(1), 56-61, 2016

    J-STAGE  Ichushi Web 

  • Environmental impacts and mineralogical characteristics of dust storm in Middle-East

    AHMADIAN Jamshid , MURATA Mamoru , AMINOROAYAEI YAMINI Maryam , OZAWA Hiroaki , KOZAI Takeshi , ADACHI Natsuko , NISHIMURA Hiroshi , Mamoru MURATA , Hiroaki OZAWA , Takeshi KOZAI , Natsuko ADACHI , Hiroshi NISHIMURA

    … Middle Earth, including Iran, Iraq, China and Syria has been recognized as one of the most important primary sources of dust. … Phases in the Middle Earth sample collected during the 20 March 2002 dust storm episode included clay minerals, noncrystalline materials, quartz, calcite, plagioclase, potassium feldspar, pyrite, hornblende, and gypsum in descending order. …

    鳴門教育大学学校教育研究紀要 (31), 75-86, 2016

    IR  DOI 

  • VESICO-APPENDICEAL FISTULA CAUSED BY APPENDICEAL CANCER : A CASE REPORT  [in Japanese]

    木村 章嗣 , 吉良 慎一郎 , 小出 晴久 [他] , 鈴木 鑑 , 森武 潤 , 平本 有希子 , 冨田 雅之 , 清田 浩 , 頴川 晋 , 石山 守 , 吉田 和彦 , 酒田 昭彦

    … A 37-year-old male was admitted with the chief complaint of suspended dust in the urine. …

    泌尿器科紀要 = Acta urologica Japonica 61(3), 95-98, 2015-03

    IR  Ichushi Web 

  • Classification and Quantification of Suspended Dust from Steel Plants by Using Color and Transmission Image Analysis  [in Japanese]

    梅垣 嘉之 , 風間 彰 , 福田 義徳

    JFE技報 (35), 33-38, 2015-02

  • Using handheld X-ray fluorescence analyzer for workplace air-quality assessment—Titanium dioxide analysis using "sample and platform's fluorescence bundle fundamental parameter method"—  [in Japanese]

    Takaya Mitsutoshi , Yamada Maromu , Shinohara Yasushi

    軽量で,電池による駆動が可能なハンドヘルド型蛍光X線分析計(HHXRF)を用い,作業環境空気中の二酸化チタン濃度を迅速に測定する方法を検討した.二酸化チタンのブタノール懸濁液をメンブランフィルターでろ過して調製した模擬試料を測定試料とし,精密測定可能な卓上型蛍光X線分析計(卓上型)とHHXRFの測定結果を比較した.HHXRF測定は,合金種判定用のファンダメンタルパラメータ(FP)計算を行う機種を使 …

    Journal of Occupational Safety and Health 8(2), 71-78, 2015

    J-STAGE  Ichushi Web 

  • Temporal Variation and Source Analysis of Radiocesium in an Urban River after the 2011 Nuclear Accident in Fukushima, Japan

    YAMASHITA Rei , KOIBUCHI Yukio , TAKADA Hideshige , MURAKAMI Michio , IWASAKI Yuichi , SHIBAYAMA Nao , SUEKI Keisuke , SAHA Mahua , MOURI Goro , LAMXAY Soulichan , O Haechong

    … <SUP>137</SUP>Cs concentrations in the particulate phase were higher during wet weather than during dry weather on the basis of both suspended solids (SS) weight and liquid volume. …

    Journal of Water and Environment Technology 13(2), 179-194, 2015

    J-STAGE 

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