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26 results on '"Yamazaki, Ichiro"'

9. 長崎市における飼い犬の犬糸状虫の仔虫保有率の27年間の年次的変化に関する研究

Author

Oda, Tsutomu, Sugenaga, Osamu, Zaitsu, Makoto, Mori, Akio, Kurokawa, Kenji, Fujita, Koichiro, Ogawa, Yasunori, Yamazaki, Ichiro, Iida, Kunihiro, Doi, Kouichi, Mine, Mariko, and Kato, Katsutomo

Abstract

The positive rate of dogs with Dirofilaria immitis microfilariae among house dogs was examined for 27 years from 1968 to 1994 in the southern and northern parts of Nagasaki City. Roles of the number of the main vector, Culex plpiens pallens and of RPSS (rate of population utilizing a sewage system) were analyzed statistically in relation to the annual changes in microfilarial prevalence. In the southern and northern parts, there was a clear correlation among three parameters of the positive rate in the dogs, the number of Cx. p. pallens and RPSS. The present study proved that the decrease in the positive rate of dogs in both the southern and northern parts is mainly attributable to a decrease in the number of Cx. p. pallens. which resulted from the decrease of the breeding places of this mosquito following the spread of the public sewage system and the improvements in the use of roads and open roadside ditches., 日本熱帯医学会雑誌, vol.23(2), pp.133-137; 1995

Published
1995

10. Japanese Society of Tropical Medicine

Author

Oda, Tsutomu, Suenaga, Osamu, Zaitsu, Makoto, Kurokawa, Kenji, Fujita, Koichiro, Ogawa, Yasunori, Yamazaki, Ichiro, Iida, Kunihiro, and Mine, Mariko

Subjects
parasitic diseases
Abstract

Female mosquitoes including Culex pipiens pallens, the main vector of Dirofilaria immitis, and some secondary vectors, were collected at 4 to 10 sites in Nagasaki City from 1983 to 1989 using light traps, and the number of the mosquitoes and the natural infection rate with D.immitis were compared between the southern and the northern parts of the city. In 1983, Cx. p.pallens was extremely prevalent in the southern part but not in the northern part. After 1986, the prevalence of Cx. p.pallens became very low in both the parts. The rapid decrease of prevalence of this species may be attributable to the decrease in breeding sites by improvement of roads and open roadside ditches in parallel with spread of sewage systems. On the basis of the number of infected mosquitoes in Nagasaki City, it was suggested that, Cx. tritaeniorhynchus and Ae. albopictus are important vectors in addition to Cx.p.pallens, but Ae. togoi does not play a significant role in the transmission of D.immitis., 日本熱帯医学会雑誌, vol.22(4), pp.199-206; 1994

Published
1994

14. ラット母児間のcharge barrierの局在

Author

山崎, 一郎, Yamazaki, Ichiro, 山崎, 一郎, and Yamazaki, Ichiro

Abstract

Near-term rats placentas were directly injected with two pairs of proteins differently charged. The placental localization of the proteins 60 min after the injection was determined by immunohistochemical staining and light microscopic autoradiography. Immunohistochemical studies (ie., immunofluorescence and immunoperoxidase studies) showed that there was no preferential localization in the placenta of native proteins injected. In contrast, cationized proteins injected were localized significantly in the Reichert's membrane. By light microscopic autoradiography, a large number of positive grains were found in the Reichert's membrane which is strongly positive for periodic acid-Schiff stain. And positive grains were also associated with trophoblast, parietal endoderm and visceral endoderm cells following the injection of cationized proteins. However, it is consistent with the immunohistochemical findings that positive grains were observed scarcely in the placenta when native proteins were injected. The present study suggest that Reichert's membrane in the rat may play an important role for the charge-dependent materno-fetal barrier since the rodent parietal yolk sac is well known to serve as a route via placenta.

Published
1990

19. Studies on Annual Changes in Microfilarial Prevalence of Dirofilaria immits among House Dogs for 27 years in Nagasaki City, Japan.

Author

ODA, TSUTOMU, primary, SUENAGA, OSAMU, additional, ZAITSU, MAKOTO, additional, MORI, AKIO, additional, UROKAWA, KENJI, additional, FUJITA, KOICHIRO, additional, OGAWA, YASUNORI, additional, YAMAZAKI, ICHIRO, additional, IIDA, KUNIHIRO, additional, DOI, KOUICHI, additional, MINE, MARIKO, additional, and KATO, KATSUTOMO, additional

Published
1995
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20. Calibration method of mutual coupling in beam forming network for phased-array antennas.

Author

Matsumoto, Yasushi, Yamazaki, Ichiro, and Hama, Shin'ichi

Subjects
*PHASED array antennas, *ANTENNAS (Electronics), *ANTENNA arrays, *MAGNETIC coupling, *ELECTROMAGNETISM, *MAGNETIC fields, *ELECTRIC fields, *TELECOMMUNICATION satellites
Abstract

To miniaturize the beam forming network (BFN) of the phased-array antenna, high-density integration of the functional components and the transmission lines is necessary. The mutual coupling between the transmission lines due to increased density also increases the array excitation error that degrades the antenna performance. In this paper, a method for measurement of the mutual coupling is presented by detecting the amplitude variation of the BFN output due to rotation of the excitation phase. This method does not need to change the integration condition of the BFN. Also, a method is presented for compensation of the excitation error caused by the mutual coupling. By experiments, the effectiveness of the methods is demonstrated. © 2000 Scripta Technica, Electron Comm Jpn Pt 2, 84(1): 40–47, 2001 [ABSTRACT FROM AUTHOR]

Published
2001
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21. Odontogenic Maxillary Sinusltis

Author

MOHRI, Manabu, primary, NISHIO, Masatoshi, additional, NOMURA, Isao, additional, MATSUMOTO, Koichi, additional, INOUE, Yoshinobu, additional, YAMAZAKI, Ichiro, additional, and IMAUE, Shigeki, additional

Published
1975
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23. Japanese Journal of Oral & Maxillofacial Surgery

Author

NIKI, Hiroshi, primary, YAMAZAKI, Ichiro, additional, TERAMURA, Yukio, additional, AKANE, Masaki, additional, YAMAOKA, Tetsu, additional, FUKUTANI, Takuya, additional, HAMADA, Yukihito, additional, and OKANO, Hakuro, additional

Published
1983
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26. The treatment and prognosis of malignant tumor in Osaka Dental University

Author

TAKEDA, Genitschi, primary, MATSUMOTO, Kaoru, additional, NAKAMURA, Shigeharu, additional, YODO, Yasunao, additional, TAKASU, Jun, additional, YAMAZAKI, Ichiro, additional, MATSUMURA, Koji, additional, SIMADA, Soshiro, additional, INABA, Osamu, additional, OKANO, Hakuro, additional, TANAKA, Yoshihiro, additional, and KOSEKI, Yonoshin, additional

Published
1979
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