著者

王 青躍 栗原 幸大 桐生 浩希 坂本 和彦 三輪 誠 内山 巌雄

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.23, no.2, pp.120-126, 2008-06-20

被引用文献数

3

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In this study, we focus on the investigation of the airborne behavior of respirable particulate matters containing Japanese cedar pollen allergen Cry j 1 exfoliated from the Ubisch bodies on the pollen surfaces and Cry j 2 comprised in the starch granules within the pollen. The airborne Japanese cedar pollens were counted, and at the same time, the Cry j 1 and Cry j 2 particles were collected and determined in different particle sizes at the urban site (Cooperative Research Center of Saitama University) during daily sampling periods of the most severe pollination season of FY 2005 in Saitama, Japan.<BR>Morphological observation of Ubisch bodies exfoliated from pollen and ruptured pollens was performed with a scanning electron microscope. Moreover, the existing evidences of visualized Cry j 1 and Cry j 2 allergen particles below 1.1&mu;m were also sensitively found by an immunofluorescence technique with a fluorescence microscope. Simultaneously, the high concentrations of Cry j 1 and/or Cry j 2 were determined in the fine particle sizes below 1.1&mu;m. It was suggested that airborne respirable particulate matters containing Cry j 1 and Cry j 2 play a key role in the increasing incidence of asthma in the lower respiratory tract. Furthermore, although the release mechanisms of Cry j 1 and a Cry j 2 particles may be differed, the daily variation delays in the peaks of Cry j 1 (or Cry j 2) concentrations compared to the peaks of airborne pollen counts were observed since the fine particles were suspended in the atmosphere over a longer period of time after released. It is important to observe and determine the size distribution of airborne Japanese cedar pollen allergen particles in the long-term sampling research continually, and to elucidate the allergen particle release mechanisms. In the future, we should investigate the chemical, physical and biomedical combination effects on Japanese cedar pollen allergens, and have to consider proposing a new forecast informational system of the Japanese cedar pollen and their allergen particle variations.

著者

中串 孝志 古川 邦之 山本 博基 大西 将徳 飯澤 功 酒井 敏

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.22, no.2, pp.107-112, 2007-06-20

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Planetary aerosol laboratory experiments for science education were carried out in a curriculum of Kyoto University. Our goal is to reproduce "the blue sunset" on Mars which are reported from NASA's Mars Pathfinder. In reproducing the rays scattered by Martian atmosphere (dust storm) in a laboratory, the number density of scattering particles has to be as large as possible. Three experiments were conducted in the air and water. Although we were not able to reproduce Martian blue sunset, we elucidated its spectrum. Converting this spectrum to a color in the RGB system, we obtained R = 114, G = 122, B = 192. Though the experiment, we proved that planetary aerosol laboratory experiments are significantly fruitful for science education as well as for science studies. We propose that researchers and lecturers should make active use of planetary aerosol laboratory experiments for science education.

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

著者

谷内 俊範 小林 憲正

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.22, no.2, pp.113-118, 2007-06-20

被引用文献数

1

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Titan is the largest satellite of Saturn, and has dense (ca. 1,500 hPa) atmosphere mainly composed of nitrogen and methane. In addition to various organic compounds, aerosol is found in the atmosphere. It is suggested that the aerosol was made of complex organic compounds, which was formed from Titan atmosphere by such energies as ultraviolet light, high-energy electrons (discharges) and cosmic rays. Voyager and Cassini missions partly revealed the nature of the aerosol. A wide variety of laboratory simulation experiments have been conducted by using a gas mixture of nitrogen and methane, and the resulting solid products are often referred as "Titan tholins". The present paper reviews these observations and simulation experiments on the Titan aerosol, and discusses its relevance to origins of life.

著者

サマラス ジシス 白井 忠

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.16, no.3, pp.190-196, 2001-09-20

著者

山田 裕司 小泉 彰 宮本 勝宏

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.11, no.1, pp.35-43, 1996-03-20

被引用文献数

7

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Aerosol penetrations through fibrous filters with pinholes were studied theoretically and experimentally. An equivalent thin filter layer (ETFL) model assuming a virtual filter layer was proposed to account for penetration through filters with pinholes. From one to thirty pinholes per filter were made on HEPA filter media using columnar pins of 0.195, 0.150 or 0.130 mm in diameter. Aerosol penetration through these filters was measured using monodisperse NaCl aerosols ranging from 0.05 to 0.3 μm in diameter at air flow face velocities of 0.00775, 0.0233 and 0.0698 m/s. Net penetration through the pinholes increased in proportion to the pinhole number and size. But there was no change in pressure drops across the filters. As a result of analysis based on the ETFL model, the layer thickness was estimated to range from 1/5 to 1/12 of the normal filter thickness. The predicted penetration curves were confirmed to agree well with the measured curves.