1 0 0 0 OA 光触媒式小型空気清浄機による飛沫除去挙動の評価
- 著者
- 秋吉 優史 綿野 哲 落合 剛
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.36, no.4, pp.263-272, 2021-12-20 (Released:2021-12-24)
- 参考文献数
- 24
A small air cleaner with the visible-light-responding photocatalyst was developed. This air cleaner is specialized in removal of the splashed droplets which flies between facing peoples to cope with various infectious diseases. Photocatalyst of a tungsten trioxide system which response efficiently to visible-light was sprayed on a conventional nonwoven fabric filter with a visible-light LED module and a silent type fan are applied. The photocatalyst was excited by visible-light to generate active oxygen that oxidizes and decompose various organic matters. In this study, the physical performance of the air purifier was estimated, 1) the removal action of splashed droplets from the oral cavity with special motion-picture system, 2) evaluation of the transmittance of droplets to the filter and 3) droplets capture performance in a clean bench. Furthermore, performance of the photocatalyst system was evaluated by formaldehyde gas decomposition rate in a small chamber. As a result, droplets of 5 micrometers or more can be removed effectively by the small air purifier, and it is considered that the virus contained in the droplets caught by the filter will be inactivated with the photocatalyst by degrees.
- 著者
- 南 光太郎 堅田 元喜 北 和之 反町 篤行 保坂 健太郎 五十嵐 康人
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.35, no.3, pp.208-218, 2020
<p> Following the Fukushima Daiichi nuclear power plant accident, it has been recognized that bioaerosols with radioactive cesium may have released from radiologically contaminated forest into the atmosphere. In order to evaluate the above process, the emission rate of bioaerosol was inversely estimated using a numerical model named SOLVEG that includes the processes of emission, deposition, and turbulent transport of aerosols. For the inverse estimation, micrometeorological variables and bioaerosol number concentration and flux were observed at a Japanese temperate broad-leaved forest in summer. By tuning modelled emission rate of bioaerosols from forest floor, its best estimate was obtained at the agreement between calculated and observed concentrations below the canopy. General trends of calculated momentum, heat, and bioaerosol fluxes above the canopy were also reproduced in the simulation. In the numerical experiment without bioaerosol input at the top of atmosphere above the canopy, a certain amount (59%) of bioaerosol flux at the floor released above the canopy top, while the rest of the flux deposited onto both canopy and soil. This potential flux above the canopy top was 2.0±1.8×10<sup>-2</sup> μg m<sup>-2</sup> s<sup>-1</sup>, which may correspond to the re-emission rate proposed previously by the chemical transport model.</p>
1 0 0 0 OA 物体表面電荷の測定
- 著者
- 村田 雄司
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.2, no.2, pp.98-103, 1987-06-20 (Released:2011-06-28)
- 参考文献数
- 4
1 0 0 0 エアロゾルと飛沫感染・空気感染
- 著者
- 竹川 暢之
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.36, no.1, pp.65-74, 2021
1 0 0 0 OA 成層圏エアロゾルと地球環境
- 著者
- 林田 佐智子
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.6, no.2, pp.137-142, 1991-06-20 (Released:2011-06-09)
- 参考文献数
- 27
1 0 0 0 衛星画像による黄砂
- 著者
- 甲斐 憲次 徳野 正己
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 = Journal of aerosol research (ISSN:09122834)
- 巻号頁・発行日
- vol.12, no.1, pp.6-12, 1997-03-20
- 参考文献数
- 19
- 被引用文献数
- 1
1 0 0 0 OA 月面ダストの生体影響
- 著者
- 森本 泰夫 三木 猛生 東 敏昭 明星 敏彦 田中 一成 向井 千秋
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.24, no.2, pp.129-134, 2009-06-20 (Released:2009-06-24)
- 参考文献数
- 22
We reviewed the effect of lunar dust (regolith) on humans from technological and biological point of views. In physicochemical properties of lunar dust, hazard-related factors are that silicon occupies about 50 % in composition, and that fibrous materials and nanoparticles are included. Animal exposure studies have been performed using a simulant of lunar dust, and it was speculated that the harmful effect of simulant lies between crystalline silica (positive control) and titanium dioxide (negative control). Fibrous materials may not have low solubility judging from the component. The nanoparticle in lunar dusts may have harmful potentials by the components. In microgravity, the deposition of particles with less than 1 μm in human lung did not decreased, but the deposition of particles with diameter of several μm decreased linearly with reducing the gravity. In microgravity the functions of macrophage including phagocytosis were suppressed. These data on the deposition of particles and the function of macrophage suggested that fine and ultrafine particles may be accumulated in the lung in microgravity. The researches on lunar dust and microgravity are preliminary and very much limited, therefore it is necessary to perform lots of researches in this field.
1 0 0 0 OA 論文特集にあたって
- 著者
- 足立 元明
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.23, no.2, pp.78, 2008-06-20 (Released:2008-06-25)
1 0 0 0 OA 能動型測器「ライダー」を用いたエアロゾルの観測研究
- 著者
- 西澤 智明 杉本 伸夫
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.24, no.4, pp.242-249, 2009-12-20 (Released:2009-12-25)
- 参考文献数
- 26
- 被引用文献数
- 2
Vertical distributions of aerosol optical properties derived from lidar measurements are essential information for evaluating climate change. The recent development of lidar, communication, and computer technologies has enabled us to conduct ground-based network observations and satellite borne, ship borne, and airborne measurements with multichannel lidar. These lidar observations and related data analyses have provided detailed aerosol information. This paper reports the current status of aerosol observations conducted with lidars by the National Institute for Environmental Studies (NIES) and those performed around the world. Several up-to-date developed algorithms that estimate aerosol optical and microphysical properties using multichannel lidar data are also reported. NIES future strategies for lidar observation and aerosol retrieval algorithms are also presented based on the current status.
1 0 0 0 OA 室内空気汚染とエアロゾル
- 著者
- 呂 俊民
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.7, no.4, pp.309-311, 1992-12-20 (Released:2011-06-09)
- 参考文献数
- 7
1 0 0 0 OA オフィスにおけるエアロゾル
1 0 0 0 OA 風成塵から眺めた古気候研究
- 著者
- 長島 佳菜 豊田 新
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.27, no.3, pp.284-291, 2012 (Released:2013-01-18)
- 参考文献数
- 42
The eolian dust in the sediments of North Pacific and marginal seas of the northwestern Pacific has potential to record past climate changes. For example, the variability of eolian dust flux estimated from North Pacific sediments have been interpreted as recording past aridity changes of the eolian source region of the East Asia. However, recent observations revealed large effects of the wind-systems on the amount of dust transported to the North Pacific and marginal seas. Therefore, it is important to consider both effects of the wind-systems and aridity changes when we interpret eolian dust parameters. Recently, we estimated provenance of eolian dust in Japan Sea sediments and reconstructed its variations during the last glacial period based on a newly developed provenance-tracing method, a combination of electron spin resonance intensity and the crystallinity of quartz. The result revealed millennial-scale provenance changes in accordance with so-called Dansgaard-Oeschger (D-O) events, with dominance of quartz from the Mongolian Gobi during cold intervals of D-O events, whereas dominance of quartz from the Taklimakan Desert during warm intervals of D-O events. These provenance variations seem to mainly represent latitudinal displacement of the subtropical jet path in harmony with D-O events.
1 0 0 0 電子顕微鏡による微粒子の測定
- 著者
- 飯島 澄男
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.4, no.3, pp.168-174, 1989
1 0 0 0 OA 大気中の硫酸塩、硝酸塩粒子の挙動
- 著者
- 大喜多 敏一
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.1, no.2, pp.90-98, 1986-06-20 (Released:2011-06-28)
- 参考文献数
- 37
1 0 0 0 OA 噴霧液滴のPDA計測
1 0 0 0 OA 病院における室内空気と微生物汚染
1 0 0 0 OA エアロゾルを用いた微粒子の静電捕集
- 著者
- 中島 耀二
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.18, no.2, pp.92-97, 2003-06-20 (Released:2007-10-16)
- 参考文献数
- 16
1 0 0 0 OA 船舶排ガス用電気集塵装置の研究開発
- 著者
- 瑞慶覧 章朝 乾 貴誌
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.30, no.2, pp.85-92, 2015-06-20 (Released:2015-06-27)
- 参考文献数
- 22
Abstract Exhaust gases emitted from ships were regulated in MARPOL Treaty 73/78 Annex VI of IMO for air pollution control. In this paper, results of a fundamental development for an electrostatic precipitation (ESP) and a demonstration test for cleaning exhaust gases were described. In fundamental research, the characteristics of ESP with a heat exchanger were explained. It was described that ESP without a heat exchanger was able to remove dry soot and nano-particles, which were included with exhaust gas, in high efficiency. It was also indicated that particulate matters were generated due to condensation of gaseous soluble organic fraction and sulphate in the case of gas cooled by a heat exchanger, whereby these were also removed by ESP. In demonstration test, it was confirmed that high removal efficiency for 24 hours in ESP pilot plant was possible.
1 0 0 0 OA ラジカル捕獲剤を用いたα-ピネン由来二次有機エアロゾル雰囲気下の活性種の捕獲と分析
- 著者
- 斎藤 弘樹 木浪 由菜 川畑 未夢 大原 伊織 藤谷 雄二 五東 弘昭 榊原 和久
- 出版者
- 日本エアロゾル学会
- 雑誌
- エアロゾル研究 (ISSN:09122834)
- 巻号頁・発行日
- vol.31, no.4, pp.278-286, 2016-12-20 (Released:2017-01-06)
- 参考文献数
- 24
In order to clarify the mechanism to induce biologically hazardous phenomena in the environment by the reaction of the Secondary Organic Aerosol (SOA) and to identify reactive species in SOA atmosphere (particles and gaseous constituents are coexisting), experiments of capturing reactive species in the gas chamber where SOAs were generated via the reaction of ambient air containing α-pinene with ozone have been carried out by taking advantage of radical scavenging reagents. The obtained adducts in SOA atmosphere were analyzed by ESR (Electron Spin Resonance) and LC/MS (Liquid Chromatography/Mass Spectrometry). ESR signal intensities of the radical scavenging samples exposed by SOA atmosphere were smaller than those of the control sample due to the formation of diamagnetic adducts. And new peculiar peaks (α-pinene radical adducts produced by the trapping reactions with radical scavenging reagents) were detected by LC/MS. Thus, it is plausible that reactive species in ambient air can be identified surely from analytical approach of the adducts formed with radical scavenging reagents.
