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结果 171-180 的 285
Study on the wastewater treatment exhausted from the chemical laboratory, 2: The ferrite process and its actual application
1979
Seki, H. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Katsuno, T.
Studies on pesticide residues in foods: Transition of organochlorine pesticide residues in raw milk produced in Nagano (1970-1977)
1979
Yamaura, Y. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Maezawa, H. | Kawamata, S. | Kobayashi, M.
The Transition of organochlorine pesticide residues la raw milk produced in Nagano prefecture during the period of 197O-1977, were investigated. alpha, beta, gamma and delta-BHC, pp'-DDT, pp'-DDE and pp'-DDD, dieldrin were found to be present in raw milk. The following substances were not detected; op'-DDT, aldrin, endrin, heptachlor and heptachlor epoxide. It was observed that the contamination of raw milk by organochlorine pesticides showed a decrease by about 90% in BHC residues for a period of eight years.
显示更多 [+] 显示较少 [-]Atomic absorption spectrophotometric determination of cadmium, copper, lead in organic matter with high molecular weight amine extraction
1979
Matsuzawa, K. (Nagano-ken. Research Inst. for Health and Pollution (Japan))
As high molecular weight amine were able to extract trace cadmium, copper and lead Into an organic phase at the potassium iodide-sulfuric acid, simultaneously, conditions for determination directly organic phase with atomic absorption spectrophotometry were investigated. By setting potassium iodide concentration and sulfuric acid concentration at 0.2M and 3.6 N, respectively, cadmium, copper and lead were extracted with 5v/v% Amberlite LA-2-n-Buthyl acetate solution simultaneously. Under the conditions above described, the extraction rate of cadmium, copper were 100% and its of lead was 98%. The coefficient of variation were proved to be 0.71%, 1.47%, 1. 30%; which were obtained by the 20 repeats of determination with 1 micro g/ml cadmium, copper solution and 5 micro g/ml lead solution With regard to the effect of coexisting ions, alkaline metals, alkaline earths metals, Fe(II), Zn(II), Al(II), Mn(II), Cr(IV), Si(IV), Ni(II), As(III) etc. did not interfere. The method was applied to the determination of cadmium, copper and lead in hair with satisfactory results.
显示更多 [+] 显示较少 [-]The berberine content at the parts of Phellodendron amurense Ruprecht [Rutaceae]
1979
Kubota, M. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Asakawa, K. | Matsuzawa, K.
Research of heavy metals in river sediments
1979
Takeda, Y. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Kawamura, M.
Investigation of harmful substances in crows and dogs
1979
Akaoka, T. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Tsukioka, T.
[Hydrocarbon pollution of western Mediterranean surface waters -Pt. 1: Tar balls]
1979
Ros, J. | Faraco, F.
The benthos of Rijeka Bay - Subject to stress of pollution [Adriatic Sea, Yugoslavia]
1979
Zavodnik, D. | Zavodnik, N.
Monitoring of chlorinated hydrocarbons in biota of the north and middle Adriatic coastal waters
1979
Nazansky, B. | Picer, N. | Picer, M. | Ahel, M.
