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The octanol/water partition coefficients (P ow) of six monoisocyanate and five diisocyanate compounds were determined by high performance liquid chromatograph (HPLC) methods. Two HPLC peaks, a broad tailed peak followed by a sharp one, were observed with all compounds. The later peak was identified as the isocyanate compound. The P ow value for each isocyanate compound was determined by fitting the capacity factor of the peak to the regression equation drawn from those of reference compounds. The hydrophobic substituent constants for the isocyanate group were calculated with each of the compounds. The value of this constant was strongly dependent on the type of carbon bound to the isocyanate group and the average values for the aromatic and aliphatic isocyanate groups were 0.35 and — 0.52, respectively. Because of the reactivity of those compounds in the aquatic environment, the P ow has little relevance to calculation of their environmental fate and ecotoxicity. 相似文献
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Rafael Vicente de P��dua Ferreira Solange Kazumi Sakata Vera L��cia Keiko Isiki Hissae Miyamoto Maria Helena Bellini Luis Filipe C. P. de Lima J��lio Takehiro Marumo 《Environmental Chemistry Letters》2011,9(2):209-216
The present study investigated the influence of 241Am on microbial growth and the degradation of organic waste. Leachate samples collected in a lysimeter were periodically analyzed
for bacterial growth, under both aerobic and anaerobic conditions. 241Am inhibited bacterial growth, and the degradation of organic matter was delayed in comparison with the control. Minimal inhibitory
concentration assays and survival curves revealed that it inhibits the growth of Pseudomonas putida F1. The assay also revealed that 241Am is more toxic than 238U, Zn2+ and Cd2+. This study further led to the finding of four new radionuclide-tolerant bacterial strains: Flavobacterium spp., Pseudomonas gladioli, Chryseobacterium indologenes and Ochrobactrum anthropi. The survival curves of P. gladioli, C. indologenes revealed that these bacteria are resistant to metal as consortia. 相似文献
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Dr Haruo Takabayashi Soryu Kuwabara Toshihiko Ukita Kazumi Ikawa Kaoru Yamafuji Tatsuhiro Igaras 《黑龙江环境通报》1995,15(1):74-77
Several attempts have been made to detect and retrieve fetal nucleated cells including nucleated erythrocytes (NRBCs), leukocytes, and trophoblasts in maternal blood. We have recently developed a new method for non-invasive fetal DNA diagnosis from maternal blood. Peripheral blood granulocytes including NRBCs were isolated by a discontinuous density gradient method using Percoll (Pharmasia). NRBCs were found and retrieved at a single cell level using a micromanipulator under a microscope. To determine whether the origin of the NRBCs was maternal or fetal, the NRBCs were analysed by polymerase chain reaction (PCR) amplification to determine the presence of a Y-chromosome-specific repeat sequence in mothers carrying male fetuses. We were successful in predicting fetal sex accurately in 10 out of 11 samples taken from maternal blood. This new technique opens up fetal DNA diagnosis from maternal blood during the first trimester of pregnancy to the whole population because there is no risk to the fetus or the mother. 相似文献
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Guido Grause Takahisa Hosoya Kazumi Hashimoto Tomohito Kameda Toshiaki Yoshioka 《Journal of Material Cycles and Waste Management》2014,16(3):519-524
The modification of poly(vinyl chloride) was carried out with iminodiacetic acid (IDA, C4H7NO4) and iminodiacetic acid dimethylester (IDADM, C6H11NO4), as well as with n-dodecanethiol (DT, C12H26S) in the presence of K2CO3. The reaction was carried out at different temperatures below 100 °C with dimethyl formamide (DMF) and cyclohexanone as solvents. IDA did not show any reactivity, probably due to the dipolar character of the molecule. IDADM caused the elimination of HCl, while only substitution ratios of about 3 % were observed. However, the modification of PVC with DT resulted in a substitution rate of 18 % without elimination. DT-PVC showed excellent thermal properties, comparable with those of the unmodified polymer. 相似文献
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Kazumi Asako 《Journal of Environmental Economics and Management》1980,7(3):157-183
This paper first analyzes the interactions between capital accumulation and environmental pollution under the program of sustained constant utility, which depends on per capita consumption and pollution, over all generations. Then the optimal program of economic growth is discussed. The implications of the constant-utility criterion (or the max-min principle) are compared with those of the utilitarian criterion which has been widely adopted in environmental pollution literature. Subsequently, the analysis incorporates pollution-abatement investment and exhaustible resources. We conclude that the max-min principle works fairly satisfactorily in this world. 相似文献
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Mandour Ahmed S. Elsayed Roushdy F. Ali Asmaa O. Mahmoud Ahmed E. Samir Haney Dessouki Amina A. Matsuura Katsuhiro Watanabe Izumi Sasaki Kazuaki Al-Rejaie Salim Yoshida Tomohiko Shimada Kazumi Tanaka Ryou Watanabe Gen 《Environmental science and pollution research international》2021,28(7):7815-7827
Environmental Science and Pollution Research - Copper deficiency (CuD) is a common mineral disorder in ruminants, which causes histomorphological changes in the heart due to disturbances in... 相似文献
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