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排序方式: 共有213条查询结果,搜索用时 854 毫秒
141.
K. Kono Y. Yoshis M. Watanabe K. Usu H. Nagaie Y. Takahashi Sun G Ding G Hu Y 《环境科学学报(英文版)》1996,8(2):242-248
Serumandurinemonitoringoffluorideexposedworkersinaluminiumsmeltingfactory¥K.Kono;Y.Yoshisda;M.Watanabe;K.Usuda;H.Nagaie;Y.Tak... 相似文献
142.
To determine the fetal sex on 30 women who were 16–20 weeks pregnant, about 100 000 maternal blood nucleated cells were analysed by means of fluorescence in situ hybridization (FISH) with a Y-chromosome-specific DNA probe. Cells with the hybridization signal were detected in 12 of the 30 women. All the 12 mothers gave birth to a male child. Of the other 18 women who had no Y-positive cells in the peripheral blood, 14 gave birth to a female child and four gave birth to a male child. These false-negative results probably occurred because the number of cells examined was inadequate. The data obtained in this study suggest that fetal sex determination using maternal peripheral blood with FISH is possible and that this diagnostic method will be clinically useful when more cells are analysed. 相似文献
143.
N. Watanabe N. Tanikawa T. Oikawa S. Inoue J. Fukuyama 《Journal of Material Cycles and Waste Management》2003,5(1):0069-0076
A method of determining the chlorine (Cl) and sulfur (S) in municipal solid waste (MSW) was studied. The quartz furnace method
was improved in two ways: recovery from ash by hot extraction with dilute nitric acid, and avoidance of the volatilization
of alkali (earth) metal chlorides by setting the sample combustion temperature at 600°C. In a comparison with the bomb method,
using nine sets of kitchen garbage and waste plastics, the bomb method yielded a 15%–25% lower value than the improved quartz
furnace method. Combustion in the bomb was frequently incomplete, resulting in recovery losses of Cl and S. The average kitchen
garbage involved 5.2 mg Cl/g, of which at least 24.1% would be converted to HCl. Plastics contained 23 mg Cl/g generating
88.1% HCl on average. In the same way, kitchen garbage contained 3.0 mg S/g, generating 52.3% SO
x
, whereas plastics contained 1.1 mg S/g with 55.1% SO
x
formation.
Received: March 20, 2002 / Accepted: October 13, 2002 相似文献
144.
Daisuke Inoue Koki Nakam Kazuko Sawa Taro Watanabe Hisae Matsui Kazunari Sei Tsuyoshi Nakanishi Michihiko Ike 《环境科学学报(英文版)》2011,23(1):125-132
To assess the potential endocrine disruptive effects through multiple nuclear receptors(NRs),especially non-steroidal NRs,in municipal wastewater,we examined the agonistic activities on four NRs(estrogen receptor α,thyroid hormone receptor α,retinoic acid receptor α and retinoid X receptor α) of untreated and treated wastewater from municipal wastewater treatment plants(WWTPs) in Japan using a yeast two-hybrid assay.Investigation of the influent and effluent of seven WWTPs revealed that agonistic activities... 相似文献
145.
Genetic population structures along the Japanese coast, analyzed by sequence data from the mitochondrial DNA COI region, were
determined for four intertidal brachyuran species in the superfamily Thoracotremata (Ocypode ceratophthalma, Gaetice depressus, Chiromantes dehaani and Deiratonotus japonicus), which were characterized by different habitat requirements. O. ceratophthalma (seashore; supratidal sand) and C. dehaani (estuarine; supratidal marsh) showed no significant genetic differentiation among Japanese populations. The Japanese populations
of O. ceratophthalma, however, were found to genetically differentiated from the Philippine population. G. depressus (seashore; intertidal cobbles) exhibited significant genetic differentiation between the Amami-Ohshima population and other
local populations. D. japonicus (estuarine; intertidal cobbles) showed significant genetic differentiation among many local populations separated by about
30–1,200 km. The different patterns of genetic population structure recorded for the four species, thus, do not simply correspond
to habitat type. 相似文献
146.
Takahiko Sato Kazushi Watanabe Hisamitsu Nagase Hideaki Kito Miki Niikawa Yoshitada Yoshioka 《毒物与环境化学》2013,95(1-4):305-313
The hemolytic effects of various organophosphonc acid triesters (OPEs) were investigated and they showed strong hemolyic toxicity except triethyl phosphate and tris(chloroethyl)phosphate. 2‐Ethylhexyl diphenyl phosphate (EHDP) showed the strongest toxicity. By quantitative structure‐activity relationship (QSAR) study, one‐parameter regression equation to estimate hemolysis was not obtained. But, two‐parameter regression equations were obtained which were enought to estimate EC50 and EC20. The correlation coefficients with the two‐parameter regression equations were 0.939 for log(l/EC50) and 0.946 for log(l/EC20). 相似文献
147.
Yuka Setoguchi Hidetaka Nomaki Tomo Kitahashi Hiromi Watanabe Koji Inoue Nanako O. Ogawa Motohiro Shimanaga 《Marine Biology》2014,161(8):1775-1785
In contrast to specific large benthic invertebrates in chemosynthetic ecosystems such as hydrothermal vents, meiofaunal communities in such habitats have been reported to have strong taxonomic overlap with meiofauna in the adjacent “normal” environments. However, meiofauna have only recently been included in studies of those environments and detailed information on these communities is still rare. This is especially true in the Northwest Pacific Ocean, even though there are many seamounts with active vents in the calderas of the region. Nematode community composition at the genus level in sediments from a hydrothermal vent field in the caldera of Myojin Knoll (32°06′N, 139°52′E, depth 1,300 m), a seamount on the Izu-Ogasawara Arc, Japan, was investigated for the first time and was compared with adjacent non-vent areas inside and outside the caldera. Multivariate analyses showed that the composition of nematodes in the hydrothermal field was significantly different from that in the non-hydrothermal fields around the caldera. However, the common genera, such as Oxystomina, Pareudesmoscolex, Desmoscolex, and Microlaimus were found in two, or all three vent fields while their rank contributions differed among the three fields. When the data from Myojin Knoll were compared with those from other deep-sea vent environments in different regions (e.g., North Fiji Basin, East Pacific Rise, Mid-Atlantic Ridge), the nematode composition in the vent field of the Myojin caldera was more similar to that of the non-vent fields around the caldera than the composition in vent fields of other regions. These data from the Northwest Pacific Ocean also suggest the absence of long-range transport systems and local adaptations for meiofauna in hydrothermal vent fields. 相似文献
148.
Nobuhisa Watanabe Saburo Inoue Hisao Ito 《Journal of Material Cycles and Waste Management》2000,2(1):10-15
Antimony volatilization in municipal waste incineration was studied. Two municipal waste samples and antimony(III) oxide (Sb4O6) were heated to 500°C and 700°C in an air stream in a quartz furnace. The volatilization of Sb4O6 occurred more at 700°C that at 500°C. Conversely, antimony volatilization form municipal waste was stronger at 500°C than
at 700°C. This implies that antimony from municipal waste is volatilized as chloride instead of oxide. The chlorine sources
for antimony chlorination, a gas-phase reaction involving hydrochloric acid and a solid-phase reaction of inorganic chlorine,
e.g., CaCl2, were compared. Only the solid-phase reaction could offer enough active chlorine to induce chlorination of antimony oxide.
Received: July 2, 1998 / Accepted: January 28, 1999 相似文献
149.
Koichi Haraguchi Akio Koizumi Kayoko Inoue Kouji H. Harada Toshiaki Hitomi Mutsuko Minata Miyako Tanabe Yoshihisa Kato Eri Nishimura Yoshiaki Yamamoto Takao Watanabe Katsunobu Takenaka Shigeki Uehara Hye-Ran Yang Min-Young Kim Chan-Seok Moon Hae-Sook Kim Peiyu Wang Aiping Liu Nguyen Ngoc Hung 《Environment international》2009,35(7):1072-1079
Human breast milk samples collected in 2007–2008 from four countries, Vietnam (Hanoi), China (Beijing), Korea (Seoul) and Japan (Sendai, Kyoto and Takayama), were analyzed for persistent organic pollutants (POPs) such as dichlorodiphenyltrichloroethane and its metabolites (DDTs), chlordane-related compounds (CHLs), hexachlorocyclohexanes (HCHs), hexachlorobenzene (HCB), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs). Comparing with previous surveys, the present study indicates that the DDTs in breast milk from China and Vietnam had gradually decreased during the last decade, but were still 5–10 times higher than those in other nations. The ratios of p,p′-DDE/p,p′-DDT and o,p′-DDT/p,p′-DDT were higher in Beijing than in the other countries, suggesting that there is less fresh intake of commercial DDT products and a possible exposure to dicofol in China. CHL and PCB levels were relatively higher in mothers from Japan, whereas β-HCH and HCB were more common in Chinese women. In Japan, it is suspected that mothers in the urban/coastal area (Sendai) were more continuously exposed to organochlorine pesticides (OCPs) than mothers in the rural/inland area (Takayama). In addition, OCP levels in primiparae were significantly higher than those in multiparae from Japan and Korea. These indicate that both parity and regional factors are major determinants of the levels of OCPs and PCBs in human milk. On the other hand, higher concentrations of PBDEs were observed in mothers' milk from Korea. The congener was dominated by BDE-47 (43–54%), followed by BDE-153 (23–33%) in all regions except for Beijing where BDE-28 (23%) was relatively abundant. In Japanese breast milk, regional and parity-dependent distributions were not observed for PBDEs. Among PBDE congeners, age-dependency was observed for BDE-153, which was negatively correlated (p < 0.05) to the age of mothers in Kyoto (17 participants were housewives), while it increased with age in Sendai (10 participants were clerks). No such correlation was seen for BDE-47, indicating that BDE-47 was ingested and assimilated via different kinetics or routes from BDE-153 in Japan. 相似文献
150.
S. Hirota M. Matsuura H. Masuda A. Ushiyama K. Wake S. Watanabe M. Taki C. Ohkubo 《The Environmentalist》2009,29(2):186-189
A cranial window method modified for our experiment enabled to observe the cerebral microcirculation including the blood-brain
barrier permeability after a local expose to radio-frequency electromagnetic fields with a monopole antenna in rats. The present
report reviews our recent publications that reported no noticeable changes in the cerebral microcirculatory parameters due
to RF-EMF exposure. 相似文献