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Результаты 171-180 из 197
[The research topic of North Rhine-Westphalia on "air pollution and forest damage". - Research plan for the research programme]
1987
Koeth, I. | Prinz, B.
[Measurement and experiment station in the forest (MEXFO) -First results of the analyses of precipitation and soil water samples]
1987
Thiele, V. | Specovius, J. | Metzger, F. | Prinz, B.
Reversibility of acidification
1987
Barth, H.
Controlling and reducing pollution from plastic waste
1987
[Morphological and physiological damage of soil deterioration to the mycorrhiza-root-system of European beech and possibilities of regeneration of mycorrhiza]
1987
Hofmann, H.-P. (Karlsruhe (Germany, F.R.). Botanisches Inst.)
The isolation of Campylobacter and Salmonella from the healthy dogs and cats in Nagano prefecture
1987
Muramatsu, K. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Sasai, S. | Wada, M. | Miyasaka, T.
During the period from 1981 to 1986, Campylobacter and Salmonella were isolated from healthy dogs and cats by the Nagano Prefecture Dog Pound Office. Campylobacter was isolated from 35 (7.0%) dogs out of 497 and 14 (10.1%) cats out of 138. Salmonella was isolated from 38 (7.6%) dogs out of 497, but not isolated from cats. The frequency of the isolation of Salmonella in puppies (under one year old) was about 2 times higher than that of adult dogs. A total of 42 strains of Salmonella was isolated from the dogs, and it was typed into 15 serovars. S. infantis, S. agona, S. anatum and S. paratyphi B, d- tartrate(+) were the most frequent serovars. Isolated Campylobacter strains were identified as C. jejuni (48 strains) and C. colt (1 strain). Considering these results, we were suggested that dogs and cats may act as possible sources of Campylobacter and Salmonella infection in human.
Показать больше [+] Меньше [-]Investigation on release of nitrogen and phosphorus from the sediments of different depth in Lake Suwa [Japan]
1987
Kono, Y. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Terasawa, J. | Harada, T. | Nasu, Y. | Kugimoto, M.
For the purpose of determining the effect of dredging on nutrients releasing from the sediment at the bottom of Lake Suwa after some of its sediment has been dredged, an experiment was performed to find out how much ammonium and phosphate would release from different depths of the sediment. Lake Suwa's sediment contains a lot of nitrogen and phoshorus down to its lower layers. The results of the experiment were as follows: The speed at which ammonium released from was faster as the depth of sediment increased. The speed at which ammonium was generated in the sediment showed the highest of 2.58N micro g/g dry sediment d in a 0-10cm layer. However, ammonium showed a generation speed of 1.3-1.4N micro g/g dry sediment-d at the depth of 10cm and more, indicating that ammonium easy to release from is generated even in lower layers. The speed at which phosphorus released from was 1.3-1.7Pmg/square m d in a 0-20cm deep layer, and 0.14-0.31Pmg/square m d at the depth of 20cm and more. The speed of Phosphorus releasing from lower layers of the sediment decreased to 1/4-1/10 of that in upper layers, and it was indicated that very little phosphorus flows out of the sediment at the depth of 20cm and more.
Показать больше [+] Меньше [-]The concentrations of boron, beryllium, antimony, selenium and vanadium in soils in Nagano prefecture [Japan]
1987
Seki, H. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Yanagimachi, Y. | Maruyama, M. | Nagase, K.
The Use of macrophytes in water pollution control
1987
Athié, Diva | Cerri, Carlos Clemente
Transition of water pollution load in Lake Suwa [Japan]
1987
Terasawa, J. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Kawamura, M. | Higuchi, S. | Nakazawa, Y.