著者
吉澤 晋 菅原 文子 安枝 浩 信太 隆夫 入江 建久 阪口 雅弘 井上 栄
出版者
一般社団法人 日本アレルギー学会
雑誌
アレルギー
巻号頁・発行日
vol.40, no.4, pp.435-438, 1991
被引用文献数
14

ダニアレルギー患者のアレルゲン暴露量を効果的に減らす方策を考えるために, 空中浮遊ダニアレルゲンの挙動を調べた. 布団をたたいてダニアレルゲンをアンダーセンサンプラーで粒子径別に, またスリットサンプラーで経時的に捕集した. 両サンプラーの寒天板上に集められた2種類のダニ主要アレルゲン (Der I, Der II) は, 免疫化学的に測定した. その結果は, Der I, II ともその抗原活性の80%は空気力学的粒子径が5.5μm 以上に分布した. 浮遊両アレルゲンとも30分間で10%に減衰した. これらの結果は, 布団から飛散するダニ主要アレルゲンは空中に長く浮遊せずにすぐ落下することを示している.
著者
清澤 裕美 野崎 淳夫 吉澤 晋
出版者
日本建築学会
雑誌
日本建築学会環境系論文集 (ISSN:13480685)
巻号頁・発行日
vol.70, no.596, pp.29-35, 2005-10-30 (Released:2017-02-11)
参考文献数
13
被引用文献数
2

The purpose of this paper is to quantitatively determine the removal performance on cedar pollen of domestic air cleaners which have widely been utilized in ordinary houses. Five domestic air cleaners were tested in an experimental chamber, using cedar pollen and the JIS Test Powder. The evaluation were made with an index of equivalent clean air rates (ECAR). The results showed that the removal rates of cedar pollen were 19.12〜180.2(m^3/h) for 0.3μm particles, and 18.7〜213.0 (m^3/h) for 0.5μm particles except for one type and with JIS Test Powder 20〜50(m^3/h) for all type of domestic air cleaners. The pollen has smaller particle portion than the JIS Test Powder No.11 and the performance of cleaners cannot be estimated simply from the morphological size distribution of the test aerosols. The analytical prediction of pollen concentration were made and compared with the results of experiment to show a fairly good fit for particles smaller than 1μm.
著者
野崎 淳夫 吉澤 晋 小峯 裕己
出版者
一般社団法人日本建築学会
雑誌
日本建築学会計画系論文報告集 (ISSN:09108017)
巻号頁・発行日
no.411, pp.9-16, 1990-05-30
被引用文献数
4

It is important ot clarify the air pollutant emission rates from the appliances in residences in order to protect indoor air from polluting. Traditionally, the unvented portable kerosene heaters have been one of the most popular heaters in Japan. These unvented kerosene fired space heaters, as well known, produce accumulation of contaminants indoors, of which concentration depends on the room's ventilation characteristics as well as the appliance'. Especially the emission rates from the devices have the characteristics that change in the residence with low ventilation rate where slight decrease of oxygen concentration is caused by usage of combustion appliances in a room itself. We conducted laboratory tests on their air pollutant's emission rates under lower or higher ventilation rates to determine the relationships between indoor concentration of oxygen and the emission rates of nitrogen oxides, carbon monoxide from two popular types of heaters in Japan. One type is of radiant kerosene space heater, the other is of kerosene fueled "fan heater" which are widely utilized in throughout Japan. We found that, with O_2 depression, CO generation rate gradually increased and NO_x generation gradually decreased.
著者
野崎 淳夫 飯倉 一雄 坊垣 和明 吉澤 晋
出版者
日本建築学会
雑誌
日本建築学会計画系論文集 (ISSN:13404210)
巻号頁・発行日
vol.67, no.557, pp.73-79, 2002-07-30 (Released:2017-02-04)
参考文献数
14

A lot of paints, adhesives and chemical materials which are known to emit gaseous chemical pollutants are being used in buildings. These building materials are potential sources of indoor chemical substances. Bake-out has been as one mitigation method for such elevated formaldehyde concentrations. The bake-out procedure could increase the transfer of indoor chemical substance from sources to the outdoor. The bake-out hypothesis is that this source depletion is sufficient to cause formaldehyde emission rates to be significantly less than they would have been without bake-out. So, this study was conducted 1) to establish the bake-out procedure and evaluation methods used with test pieces and an environmental chamber, 2) to determine the effectiveness of the bake-out on formaldehyde reduction, and 3) to analyze the relationship between specification of building parts and the reduction effectiveness on the sources by the bake-out. From our results, it turned out that the emission rate of formaldehyde was decreased by 6.54〜55.6% after bake-out in a temperature of 38℃ for the period of 72 hours. And, if we wish to determine the effectiveness of bake-out on the VOCs, further experiments used by chambers should be needed.
著者
野崎 淳夫 吉澤 晋 小峯 裕己
出版者
一般社団法人 日本建築学会
雑誌
日本建築学会計画系論文報告集 (ISSN:09108017)
巻号頁・発行日
vol.411, pp.9-16, 1990-05-30 (Released:2017-12-25)
被引用文献数
1 1

It is important ot clarify the air pollutant emission rates from the appliances in residences in order to protect indoor air from polluting. Traditionally, the unvented portable kerosene heaters have been one of the most popular heaters in Japan. These unvented kerosene fired space heaters, as well known, produce accumulation of contaminants indoors, of which concentration depends on the room's ventilation characteristics as well as the appliance'. Especially the emission rates from the devices have the characteristics that change in the residence with low ventilation rate where slight decrease of oxygen concentration is caused by usage of combustion appliances in a room itself. We conducted laboratory tests on their air pollutant's emission rates under lower or higher ventilation rates to determine the relationships between indoor concentration of oxygen and the emission rates of nitrogen oxides, carbon monoxide from two popular types of heaters in Japan. One type is of radiant kerosene space heater, the other is of kerosene fueled "fan heater" which are widely utilized in throughout Japan. We found that, with O_2 depression, CO generation rate gradually increased and NO_x generation gradually decreased.
著者
吉澤 晋 飯倉 洋治 松前 昭廣 菅原 文子 小峯 裕己
出版者
一般財団法人 住総研
雑誌
住宅総合研究財団研究年報 (ISSN:09161864)
巻号頁・発行日
vol.17, pp.313-329, 1991 (Released:2018-05-01)

近年,喘息その他のアレルギー性疾患が社会的な問題となって来ている。その原因としては食物以外に,大気汚染,ダニ,花粉,カビ等居住環境に関連した多くのものが挙げられているが,特にカビは住宅の断熱性・気密性の向上と生活様式の変化に関連しでいるものと考えられている。この研究は,カビ・アレルギーの実態,患者の居住環境のカビ汚染の実態,評価方法,成育条件等の調査を通して,被曝量の予測,総合的対策について検討したものである。まず小児アレルギー疾患とカビについて住宅構造との関連について既知の知見をまとめた。住宅室内に成育するカビについての調査を夏季・冬季に行ない,成育する状況およびその主要なカピの属・種を求めた。さらに在来からの知見により,住宅に成育するカビの主要なもののまとめを行なった。住宅の空気経路による被曝の評価のためには,多数の住宅における測定が必要であり,患者家族に測定を依頼するためにパッシプ型の測定器の基本特性を求めた。カビ粒子に対して,12時間程度の被曝を計測する落下法が利用できることが分かった。カビの成育について,壁面の水蒸気圧と結露の影響を実際の住宅で調査を行なった。また,各種の相対湿度に対する建築材料,畳等におけるカビの成育速度,および更に温度変動を与えた時の成育速度への影響等を求めた。最後にこれらの調査に基づいて,住宅室内におけるカビ・アレルギーの防止対策の提案を行なっている。
著者
野崎 淳夫 清澤 裕美 吉澤 晋
出版者
日本建築学会
雑誌
日本建築学会環境系論文集 (ISSN:13480685)
巻号頁・発行日
vol.69, no.576, pp.37-42, 2004-02-28 (Released:2017-01-27)
参考文献数
7
被引用文献数
2 4

In recent years, air cleaners are often used because of increasing interest in room air quality. However, there is currently no unified method for determining the removal effectiveness of air-cleaners. Here, we report the results of experiments on five type of domestic air cleaner units in a experimental room, using ETS(Environmental Tobacco Smoke). This study was carried out to determine the removal effectiveness of air cleaners on suspended particulate matter evaluated employing an index of equivalent clean air rates(ECAR). The results showed that the removal rates of suspended particulate matter were 59.1〜125.7(m^3/h) for 0.3μm particles, and 115.5〜188.7(m^3/h) for 0.5μm particles respectively with fan-filter units. The rates were much lower for the electro-static collector type unit without fan : 3.9(m^3/h) for 0.3μm particles, and 14.8(m^3/h) for 0.5μm particles respectively
著者
吉澤 晋
出版者
東京大学
雑誌
挑戦的萌芽研究
巻号頁・発行日
2012-04-01

本研究では、様々な海洋環境から分離した発光細菌の発光色を詳細に調べ、発光細菌発光色の生態学的意義の解明を目指した。発光色を調べた結果、発光細菌の放つ光の色は単一ではなく、複数のバリエーションがあることが分かった。また、極大波長が480 nm以下の発光色を持つ株は細胞内に発光色を変化させる蛍光タンパク質を持つことが明らかになった。
著者
清澤 裕美 吉澤 晋
出版者
日本建築学会
雑誌
日本建築学会計画系論文集 (ISSN:13404210)
巻号頁・発行日
vol.66, no.548, pp.63-68, 2001-10-30 (Released:2017-02-04)
参考文献数
16
被引用文献数
5

The purpose of this paper is to quantitatively determine the rate of intrusion of cedar pollen to indoor environment, to estimate the exposure dose and to provide the control measures. Cedar pollens were determined microscopically on settle plates covered with adhesive material in wooden dwellings, flats, and several buildings. The settlements were variable according to the height and position of the rooms. The settlements on the floor were 1.5 to 2 times higher than at the breathing zone and those at just the inside of the windows were 5 to 6 times as much as at the center of the rooms. The rates of settlement were 0.4 to 0.8 p/cm2/day at the center of house and 1.9 to 2.8 at inside of windows. The intrusion rates were about 1.6% at the center of the house, 3.1% at the window and 26% at the places with opened windows. Throughout all the measurements, inside/ outside ratio, which is the simple ratio of settled pollen inside to those outside, was 1 to 2%. The calculated doses inside the room were 1 to 2% of outside. The doses become about twice at the windows and 10 to 20 times at places with opened windows of values at the center of house.
著者
野崎 淳夫 吉澤 晋 小峯 裕己
出版者
一般社団法人日本建築学会
雑誌
日本建築学会計画系論文報告集 (ISSN:09108017)
巻号頁・発行日
no.416, pp.9-16, 1990-10-30

The indoor NO_2 concentration in Japanese dwellings were measured with various parameters using badge-type passive monitors. The comparison of the method by badge-type passive samplers developed by Dr. Yanagisawa and the conventional chemi-luminescence method was made in the measurement of indoor NO_2 concentration. The measured values with badge-type samplers agree with the ones from the chemi-luminescence monitors. Indoor NO_2 concentration is mainly influensed not by the outdoor concentration but the usage of combustion appliances, especially the type and the usage time of appliances. The life pattern in the room also influenced the indoor NO_2 levels.
著者
野崎 淳夫 吉澤 晋
出版者
一般社団法人日本建築学会
雑誌
日本建築学会計画系論文報告集 (ISSN:09108017)
巻号頁・発行日
no.429, pp.17-23, 1991-11-30
被引用文献数
4

To estimate the indoor concentration of NOX by the usage of flue-less type combustion appliances, experimental study was carried out in a laboratory where the ventilation rate, consequently oxygen concentration was controlled. The NO generation rate decreased proportionally with the depression of oxygen concentration to a certain point, K_c, beyond which the decrease rate was much less. N0_2 showed the almost constant generation to K_c, beyond which decreased proportional to oxygen concentration. Though we could not determine K_c with radiant type heaters, the decrease of NO_x emission rate was proportional to oxygen and moderate compared to "fan heater"s.
著者
梅村 晋一郎 吉澤 晋
出版者
東北大学
雑誌
基盤研究(B)
巻号頁・発行日
2010

生体組織の超音波加熱を促進するキャビテーション気泡の強力な超音波パルス照射による生成を,まず,高速度カメラを用いて研究した.そのために,生体に類似した超音波特性をもち光学的に透明なゲルファントムを作成し,実験を行った.強度10kW/cm^2程度以上の超音波パルスにより,目的の気泡をゲル中に生成できること,また,100μs程度以下の短いパルスを用いれば,超音波焦点付近に限局して生成できることを確かめた.次に,生成したキャビテーション気泡により,摘出生体組織を超音波加熱凝固するスループットを顕著に改善できることを確かめた.さらに,第2高調波重畳波を用いることにより,目的のキャビテーション気泡を発生するに必要な超音波強度を顕著に低下させ得ることを見出した.