خيارات البحث
النتائج 51 - 60 من 90
Treatment of human excreta in mountainous area by anaerobic digestion and seepage spray method
2004
Suzuki, T.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Murakami, R. | Ishikawa, T.
A research on a treatment system of human excreta provided for the use in mountainous areas was carried out. The system was composed of two treatment processes, an anaerobic digestion and a seepage spray process. Vertical distributions of chemical components were observed in the anaerobic digestion tank, because the top of the tank was covered with water permeable phase and rain water was penetrated into the tank. Comparing the amount of inflow into and of evapotranspiration from the system, about 70% of the inflow was overflowed from the seepage spray tank, under the assumption that the whole rain water fallen on the system was permeated into it.
اظهر المزيد [+] اقل [-]Behavior of bisphenol A in waste landfill leachate and changes of water quality in leachate treatment process
2004
Sasai, H.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Hosoi, Y. | Oguchi, F. | Kawamata, S. | Ishikawa, T.
Determination of anilazine and propazine in agricultural products
2004
Tsukioka, T.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Hanaoka, Y. | Sato, S.
An investigation was made to find analytical method for anilazine and propazine remaining in agricultural products. Since anilazine was found to be decomposed enzymatically when applied on cabbage, radish, etc., phosphoric acid was added to the sample to suppress the enzymatic activity before subjecting the sample to an extraction with acetone. The extract was re-extracted into n-hexane, cleaned up with a Florisil column, and finally subjected to a determination with ECD-GC. Propazine was found to be insusceptable to any enzymatic decomposition, but it was subjected to the same acetone extraction and n-hexane re-extraction as with anilazine, separated from anilazine with a Florisil column, and subjected to a determination with NPD-GC. The detection limits of these methods are 0.01 micro g/g for both anilazine and propazine. The addition-recovery experiments conducted resulted in recoveries of over 79 and 82% with coefficient of variation of less than 5.6 and 5.5% for alilazine and propazine, respectively (n=5). The present methods were applied to actual agricultural products, with neither anilazine nor propazine detected (n=22).
اظهر المزيد [+] اقل [-]A survey of detection of cyclamate in foods imported from China
2004
Miyagawa, A.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Tsukioka, T. | Terasawa, J.
Temporal variation in quality of groundwater from a shallow well in an agricultural (apple orchard) area
2004
Fukuzawa, H.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Akaoka, T. | Ozawa, H.
Use of headspace-SPME-GC/MS to identify matters causing food complaints and accidents resulting in the death of animals
2004
Tsukioka, T.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Terasawa, J. | Miyagawa, A. | Nakazawa, H. | Hanaoka, Y. | Sato, S. | Shimizu, S. | Maruyama, S.
Many complaints have been made about bad smelling and tasting food and accidents resulting in the death of animals in Nagano Prefecture. The method of headspace SPME-GC/MS has been found very effective as a screening method to investigate the cause of these complaints and accidents. This method is characterized mainly in that the operation is simple without using any solvents for extraction, causing no environmental pollution; the extraction may be carried out in a short time with a small quantity of sample in low concentration, preventing reagent contamination, the whole extract may be injected, leading to high sensitivity, and the fiber may be used repeatedly, making the analytical cost inexpensive. This paper describes representative examples of cases in which the relevant causes have been solved.
اظهر المزيد [+] اقل [-]Evaluation by AOT40 method on the effects of ozone on forest tree species
2004
Satsumabayashi, H.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Uchida, H. | Sasai, H. | Nomizo, H. | Kawamura, M. | Hutaki, K.
Secular variation of water quality of the hot spring sources in Akiyama-Gou [Japan]
2004
Takano, H.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Yamaura, Y. | Nishizawa, C. | Harada, T. | Taguchi, Y.
Regional and local aspects of air quality management
2004
Elsom, Derek M. | Longhurst, James W. S.
Water quality analysis of the rivers Tamis, Plovni [and] Stari Begej [Serbia and Montenegro] using the WQI method
2004
Dopudja-Glisic, T. | Denic, Lj.(Republicki hidrometeoroloski zavod Srbije, Beograd (Serbia and Montenegro))E-mail:kvalitet_voda@hidmet.sr.gov.yu
This paper presents the results of water quality analysis of the rivers Tamis, Plovni and Stari Begej, using the WQI method, for the time periods 1987-1991 and 1998-2002. It also show the trend of water quality of these water streams for two characteristic time periods, through trend of WQI index.
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