著者
石川達也著
出版者
医歯薬出版
巻号頁・発行日
1979
著者
石川達也〔ほか〕編
出版者
医学書院
巻号頁・発行日
1988
著者
石川達也 [ほか] 編集
出版者
医学書院
巻号頁・発行日
1996
著者
原学郎等著
出版者
医歯薬出版
巻号頁・発行日
1969
著者
石川達也[ほか]著
出版者
医歯薬出版
巻号頁・発行日
1982
著者
深田英朗石川達也編集
出版者
医歯薬出版
巻号頁・発行日
1966
出版者
日経BP社
雑誌
日経パソコン (ISSN:02879506)
巻号頁・発行日
no.477, pp.32-35, 2005-03-14

卒業式や入学式、春の運動会などのイベントで大活躍するのが、動画を記録するデジタルビデオカメラ(DVカメラ)。春を迎える今時期は、毎年、新機能を携えたDVカメラの新製品が各社から一斉に登場してくる。 本来なら、DVカメラの新製品を比較検討することになるのだが、今回はビデオカメラ市場でなにかと話題の「DVDビデオカメラ」に目を向けてみよう。
著者
Kawamura Seiichi
出版者
Inperial University of Tokyo
雑誌
Journal of the College of Science, Imperial University of Tokyo
巻号頁・発行日
vol.35, pp.1-29, 1915-12-30

The chief result of my observations on Pleurotus japonicus may be summarized as follows: 1. The fungus belongs to the genus Pleurotus, being characterized by the position of stem at one side of pileus, by the decurrent gills, by the spores presenting white color when caught in a mass, & c. It somewhat resembles Pleurotus rapidus Kalchbr. and Pleurotus ostreatus Jacq., but apparently represents a new and distinct species. 2. The fungus usually grows in clusters, overlapping one another, on the decaying trunk of the beech (Fagus sylvatica L. var. Sieboldi Maxim.), which is the only host as yet known. It is found in the Autumn. 3. The light is emitted by the gills only; all other parts of the fungus, including spores, are not luminous. The gills are uniformly luminous all over. Both hymenium and trama of gills are luminous. The juice squeezed out from the luminous gills are non-luminous. 4. The minimum and maximum temperatures in which the present fungus emits light are 3-5℃. and 40℃. respectively. The optimum temperature may be put down at 10-15℃. 5. In nitrogen gas, the luminosity begins to fade after ten seconds, becomes very feeble after fifty seconds, is scarcely recognizable after one minute and twenty seconds, and finally becomes completely invisible after one minute and forty seconds. In hydrogen gas, it begins to fade after ten seconds and becomes invisible in thirty minutes. In ether vapor, the light becomes invisible after one minute and fifty seconds, and if immediately after that, the object be taken out into the air, the luminosity returns after thirty seconds. In chloroform vapor, it vanishes in fifty-five seconds. Exposure to oxygen gas causes no change in the luminosity. Gills with faded luminosity become temporarily highly luminous some minutes after being in gaseous either or chloroform. 6. The fungus with luminous area of about 100 sq. cm. gives sufficient light for seeing Roman alphabets of about 8 mm. diameter in the dark. The luminosity can be fully perceived at a distance of thirty metres or more. 7. The light is white in color, not greenish, bluish or yellowish as in almost all other cases of luminous fungi. Photographic images of the luminous surface of the fungus taken in the dark room, by exposure of seven and half hours and also of twenty-four hours, were all very faint. Good dark prints on white background were secured of the leaves placed between the luminous fungus surface and a photographic dry-plate, by an exposure of one hour and fifty minutes.
出版者
一般社団法人 日本数学会
雑誌
数学 (ISSN:0039470X)
巻号頁・発行日
vol.1, no.1, pp.P1-P1, 1947-04-30 (Released:2008-12-25)
著者
彌永 昌吉
出版者
一般社団法人 日本数学会
雑誌
数学 (ISSN:0039470X)
巻号頁・発行日
vol.47, no.2, pp.184-192, 1995-05-15 (Released:2008-12-25)
参考文献数
7