著者

槌田 博 花井 義道 加藤 龍夫

雑誌

横浜国立大学環境科学研究センター紀要 = Bulletin of the Institute of Environmental Science and Technology, Yokohama National University (ISSN:0286584X)

巻号頁・発行日

vol.15, no.1, pp.29-48, 1988-12-27

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The paddy field has a large area in Japan land and therefore the aerial splay of pesticides causes serious environmental problems. The authors carried out the experiments concerning mainly air pollution of pesticides. This paper displayed some examples of 12 points in various parts. Atmospheric pollution, Water contamination and falling to the ground were examined. As a result of these experiments, it was found that air pollution in the paddy caused by pesticide is evolved from three sources. i) In the operation of spray, the pesticide vaporizes from mist of spray. ii) Under sunshine, the pesticide sublimes from leaves of rice plants. iii) After the pesticide sublimed or flowed douwn, the Air-Water Henry's Law is effective. That is, the highest atmospheric concentration of pesticides from paddys is larger than that from the forests or fields. And the reduction of concentration on the former is faster than that on the latter. This tendency is explained on the above three reasons.

著者

宮脇昭 藤原 一繪 小澤 正明

出版者

横浜国立大学

雑誌

横浜国立大学環境科学研究センター紀要 = Bulletin of the Institute of Environmental Science and Technology, Yokohama National University (ISSN:0286584X)

巻号頁・発行日

vol.19, no.1, pp.73-107, 1993-03-25

被引用文献数

12

著者

藤原 一絵

出版者

横浜国立大学環境科学研究センター

雑誌

横浜国立大学環境科学研究センター紀要 = Bulletin of the Institute of Environmental Science and Technology, Yokohama National University (ISSN:0286584X)

巻号頁・発行日

vol.7, no.1, pp.67-133, 1981-03

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The evergreen broad-leaved forests in Japan are distributed from Ryukyu -Islands to south and sea side districts of Northeast and west of the Tohoku district. The forests are called phytosociologically to Camellietea jabonicae Miyawaki et Ohba 1963 which is characterized by Camellia japonica, Castanopsis spp., Persea (Machilus) spp., Eurya japonica, evergreen Quercus (Cyclobalanopsis) spp. and other evergreen broad-leaved plants. In this report Camellietea japonicae was classified into 49 associations (8 newly described) and 7 communities, 5 alliances (3 are newly described) and 3 new orders according to the Braun-Blanquet's system of phytosociolgy. Twenty-two associations and one community belong to Quercion acuto-myrsinae-foliae al. nov,, Illicio-Quercetalia acutae ord. nov. Seven associations in this alliance arc newly described. They are Hydrangeo-Abietctum firmae, Pseudotsu-getum japonicae, Ophiopogono-Quercetum glaucae, Ilici-Quercetum glaueae, Lasiantho-Quercetum gilvae, Quercetum sessilifolio-myrsinaefoliae, Symploco-Ilicetum crenatae. Quercion acuto-myrsinaefoliae is distributed mainly in inland from Niigata Prefecture and Iwate Pref. to Yakushima in Kagoshima Pref. Seven associations and one community belong to Maeso japonicae-Castanopsion sieboldii al. nov., and are distributed hilly districts or alluvial plain along the coast from Miyagi Pref. and Aomori Pref. of the Tohoku (North-Honshu) to Kagoshima Pref. in Kyushu, Elaeo-carpctum elliptici among them, is newly descrived. Twelve associations and one community belong to Psychotrio-Castanopsion sieboldii Miyawaki, Fujiwara, Harada, Kusunoki et Okuda 1971, which is distributed in the district except on the elevated coral reef from islands of Yakushima and Tanegashima in Kagoshima Pref. to Iriomote Island in Okinawa Pref. of southern Japan. Five associations and one community belong to Rhaphiolepido-Quercion phylliraeoidis al. nov. which is distributed in the coastal cliff from Aomori Pref. and Miyagi Pref. (in North Honshu) to Okinawa Pref. These 3 alliances consistute Myrsino-Castanopsietalia sieboldii ord. nov. Five associations and one community belong to Psychotrio manilensis-Acerion oblongi Miyawaki et K. Suzuki 1974, Diospyro maritimae-Mallotetalia philippensis ord. nov. Psychotrio manilensis-Acerion oblongi is distributed on the elevated coral reef of Ryukyu-Islands. Camelietea japonicae will be larger class if it is able to compare with the vegetation the evergreen broad-leaved forests in Formosa and China.

著者

花井 義道 加藤 龍夫 飯塚 徹谷

出版者

横浜国立大学環境科学研究センター

雑誌

横浜国立大学環境科学研究センター紀要 = Bulletin of the Institute of Environmental Science and Technology, Yokohama National University (ISSN:0286584X)

巻号頁・発行日

vol.10, no.1, pp.31-35, 1983-09

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Hydrogen cyanide, one of the most injurious substance, was analyzed selectively by a gas chromatograph equipped with the thermionic nitrogen detector. Samples such as exhaust gas were introduced directly to a 90 cm×2 mm 1D glass column packed with 80/100

著者

藤原 一絵

出版者

横浜国立大学環境科学研究センター

雑誌

横浜国立大学環境科学研究センター紀要 = Bulletin of the Institute of Environmental Science and Technology, Yokohama National University (ISSN:0286584X)

巻号頁・発行日

vol.13, no.1, pp.99-149, 1986

著者

松野 武雄 長田 孝治 高木 晃

出版者

横浜国立大学環境科学研究センター

雑誌

横浜国立大学環境科学研究センター紀要 = Bulletin of the Institute of Environmental Science and Technology, Yokohama National University (ISSN:0286584X)

巻号頁・発行日

vol.2, no.1, pp.67-72, 1976-03

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Recently, it is especially attached importance to the problem that the balances in the ecosystem must be kept, In many hazardous substances causing environmental pollutions that make loss the balances, especially, mercury-related pollution has become an object of much concern. The aim of this investigation is to obtain the numerous experimental data necessary for analyzing the diffusion-transfer processes of mercury vapor in the atomospheric air. On this study, we have kept the mind that we should hold the far level to the saturated vapor of mercury so as to be depended upon actual circumstances in the proceeding of pollution. Moreover, the multivariate analysis by the computer was introduced to analyze quantitatively several elements on the experimental condition or individual relation between the data which several physical variables remove arbitrarily in the process of diffusion-transfer of Hg vapor. Consequently, it was found that the distribution of mercury level in air at the transfer processes was closely related to the temperature of the mercury emission source and considerably differed from a definite view hitherto known.

著者

青木 淳一

出版者

横浜国立大学

雑誌

横浜国立大学環境科学研究センター紀要 (ISSN:0286584X)

巻号頁・発行日

vol.24, no.1, pp.141-145, 1998

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A soil zoological investigation was done under the Legacy Project of USA and 82 species of oribatid mites were collected from forest soils in the US Marine Corps located northeastern part of Okinawa Island. They contain one species new to Japan, Arborichthonius styosetosus Norton, and 28 species new to Okinawa Prefecture.

著者

奥田 重俊 中村 幸人

出版者

横浜国立大学

雑誌

横浜国立大学環境科学研究センター紀要 (ISSN:0286584X)

巻号頁・発行日

vol.15, no.1, pp.167-174, 1988

被引用文献数

1

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Phytosociological studies of the hedgerows in rather old villages were conducted in the Amami islands of southwestern Japan in 1988. Three types of hedgerows were recognized ; 1. Ficus-virgata-Ficus microcarpa type, 2. Garcinia subelliptica type, and 3. Viburnum suspensum Fraxinus insularis type. Based on more widely surveyed materials, these types were classified through species combination into the following three hedgerow groups. A. ficus virgata group, characterized by Ficus virgata, Viburnum awabuki etc. and occurring young limestone soil originating from elevated coral reefs. B. Viburnum suspensum-Podocalpus macrophyllus group, classified by the Presence of Podocarpus macrophyllus and Viburnum suspensum, and found on well weathered soil on old limestone. C. Codiaeumt variegatum-Bougainvillea spectabillis group, Characterised by ornamental garden species and planted in the developed towns and cities. The distribution of these first two hedgerow groups seems to correspond to the potential natural vegetation.

著者

後藤 由里 梁 祖瑜 猪子 正憲 松野 武雄

出版者

横浜国立大学

雑誌

横浜国立大学環境科学研究センター紀要 (ISSN:0286584X)

巻号頁・発行日

vol.11, no.1, pp.47-51, 1984

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A rapid and simple method for the determination of the sorbic acid and sorbates in jam and marmalade was studied by means of high performance liquid chromatography. By this method, tedious pretreatments such as extraction and filtration were omitted so that the time required for analysis could be within 30 min. Half of the examined non-preserve jams and marmalades contained less than 500mg/kg of sorbicacid, but preserve jams did not contain it.