著者
張 峰 尾城 隆 隆島 史夫
出版者
The Ichthyological Society of Japan
雑誌
魚類学雑誌 (ISSN:00215090)
巻号頁・発行日
vol.39, no.2, pp.151-155, 1992-09-15 (Released:2010-06-28)
参考文献数
14

天然雌性発生3倍体性ギンブナの再生産機構を解明するために, その卵形成過程の電顕および光顕観察を行うとともに, ゲル電気泳動法により母子間のアイソザイムパターンの変異を分析した.その結果,(1) ギンブナ卵形成過程の第1減数分裂の前期に, 相同染色体問の対合を示すシナプトネマ構造が観察され,(2) 母子間のPGMアイソザイムパターンに少数例ながら明らかな相違が認められた.従って, ギンブナの相同染色体間において, 少なくとも部分的には対合と乗換えが起こるものと推察された.
著者
FUJIBE Fumiaki
出版者
Meteorological Society of Japan
雑誌
気象集誌. 第2輯 (ISSN:00261165)
巻号頁・発行日
(Released:2018-01-23)

Climatological features of surface air temperature variations on time scales of a few minutes to one hour were examined using one-minute data, spanning a four-year period, from 917 automated stations in Japan. The temperature time series was spectrally analyzed after the application of a Gaussian high-pass filter, and the variances with periods of 64 minutes or less were statistically analyzed as sub-hourly temperature variations. The result obtained shows that daytime temperature variation is observed throughout the country with relatively small regional differences. The amplitudes of daytime temperature variations were larger during spring and summer than those during autumn and winter, and under high temperature and sunny weather than under low temperature, no sunshine, and precipitation. A cross spectral analysis of temperature and wind speed reveals that temperature peaks tend to coincide with or lag behind wind speed minima. The variation is likely to correspond to the convective motion in the mixing layer. On the other hand, the intensity of nighttime temperature variation showed a large amount of scatter among stations, with exceptionally large variations during winter at some stations in northern and eastern Japan. Nighttime temperature variation tends to be in-phase with wind speed variation, with longer periods than daytime temperature variation, and is more intense under low temperature and low wind speed than under high temperature, high wind speed, and precipitation. Stations with large winter nighttime temperature variations tend to be located on a col or a slope, where the surface inversion layer is likely to be easily disturbed by any kind of atmospheric motion.
著者
池田亀鑑 著
出版者
岩波書店
巻号頁・発行日
vol.第2部 國文學に於ける文獻批判の方法論, 1941
著者
池田亀鑑 著
出版者
岩波書店
巻号頁・発行日
vol.第1部 土佐日記原典の批判的研究, 1941
著者
池田亀鑑 著
出版者
岩波書店
巻号頁・発行日
vol.第3部 資料・年表・索引, 1941
著者
山本 直紀
出版者
The Crystallographic Society of Japan
雑誌
日本結晶学会誌 (ISSN:03694585)
巻号頁・発行日
vol.39, no.4, pp.279-288, 1997-08-30 (Released:2010-09-30)

This article gives fundamentals of analyzing electron diffraction patterns for persons who start to use an transmission electron microscope.
著者
片山 伸也
出版者
日本建築学会
雑誌
日本建築学会計画系論文集 (ISSN:13404210)
巻号頁・発行日
vol.62, no.501, pp.213-218, 1997-11-30 (Released:2017-02-02)
参考文献数
43

This paper is a study about the history of the urban development of Siena. Foundation of religious institution and construction of city walls provide the dates to prove the variant periods in the development of the borghi, and thus, of the city. This article shall define those stages, comparing relation and succession of those public-oriented constructions. According to this analysis, borghi were generated in two phases : the first from the 11th to the 12th century along the via Francigena, and the second from the 13th to the 15th century in the outskirts of the city, which were dominated by monasteries.