巻号一覧
50 巻 (2006)
- 6 号 p. 483-
- 5 号 p. 239-
- 4 号 p. 175-
- 3 号 p. 115-
- 2 号 p. 69-
- 1 号 p. 3-
50 巻, 3 号
選択された号の論文の4件中1～4を表示しています
- |<
- <
- 1
- >
- >|
総説
-
板野 泰之2006 年 50 巻 3 号 p. 115-122
発行日: 2006年
公開日: 2006/06/07
ジャーナル フリーA worsening trend in photochemical air pollution has recently been recognized in Japan. In the metropolitan area of the Kanto region, photochemical oxidant (Ox) concentrations sometimes reach the photochemical smog caution level (240 ppbv: parts per billion by volume). The number of people who reported health effects from photochemical smog in 2005 was about 1,500, which is the highest in the present decade. The increasing trend in Ox is reported in wide areas of Japan. The present paper discusses some of the factors that may contribute to the worsening trend. Changes in the concentration ratio of non-methane hydrocarbons (NMHC) to oxides of nitrogen (NOx: NO + NO2) (NMHC/NOx) or in NMHC composition may result in increased ozone (O3) formation. A reduction in NO emission can also increase O3 levels because of the reduced O3-NO reaction. The increase in background O3 levels is also a possible contributor to the Japanese O3 trend. Because of the reduced level of precursors found in recent Japanese studies of air quality, the effect of these factors is more apparent than in the 1970s. Owing to the advance in analytical technique for trace and short-lived species, such as free radicals and peroxyacyl nitrates, O3 production-related factors can be observed directly. It is important to take such direct observation-based factors into account in considering air quality control strategies.抄録全体を表示PDF形式でダウンロード (499K)
解説
-
高倉 晃人2006 年 50 巻 3 号 p. 123-129
発行日: 2006年
公開日: 2006/06/07
ジャーナル フリーThe effects of dioxins call for special attention with regard to the monitoring of discharge from solid waste incinerators. The standard method for analysis of dioxins in stack gas demands much time and cost because of the many steps involved, e.g. sampling, extraction, clean-up and HRGC-HRMS operations, which makes daily gas monitoring difficult to perform. This has been the reason for the many attempts to develop a simplified and rapid method of dioxin analysis. Immunoassaying has been suggested as a promising method for screening dioxin concentrations. Another method is estimating dioxin concentrations using dioxin precursors.抄録全体を表示PDF形式でダウンロード (594K)
報文
-
濱田 信夫2006 年 50 巻 3 号 p. 130-135
発行日: 2006年
公開日: 2006/06/07
ジャーナル フリーEnvironmental factors affecting winter-time fungal contamination on sash windows, inside lower beads and rails were examined. Mold counts were about 20 times higher on sash windows in houses more than two years old than in new houses. However, no effect on fungal contamination was recognized for topography around house, house type or floor number.
Fungal contamination of sash windows was higher in bedrooms and north-facing rooms than in dining kitchens or south-facing rooms. Fungal contamination of sash windows was lower in houses occupied by two or fewer family members than in those occupied by more than two. On the other hand, there was no significant difference according to whether the heating system discharged moisture. Fungal contamination of sash windows seems therefore to be most affected by evaporation from human bodies during sleep and daily minimum temperature.
Opening the window daily and mopping daily with a dry towel were found to be effective for reducing the fungal contamination of sash windows. Installing double glazing and plastic sashes on sash windows was also found to be effective.抄録全体を表示PDF形式でダウンロード (218K)
資料
-
持田 恭, 村上 佳子, 奥野 元子, 宮崎 直子, 関 龍太郎, 大城 等2006 年 50 巻 3 号 p. 136-139
発行日: 2006年
公開日: 2006/06/07
ジャーナル フリーWe compared the fatty acid balance of the daily meals of students (aged 19-22 years) living in Matsue City, Shimane Prefecture, according to type of residence. It was found that the P/S ratio did not differ according to type of residence, but that the n-6/n-3 ratio was lower in students living at home than in those not living at home.抄録全体を表示PDF形式でダウンロード (199K)
- |<
- <
- 1
- >
- >|