巻号一覧
1 巻 (1966 - 1967)
- 4 号 p. 157-
- 3 号 p. 109-
- 2 号 p. 51-
- 1 号 p. 1-
1 巻, 3 号
選択された号の論文の5件中1～5を表示しています
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Tadashiro Koyama, Takao Tomino1967 年 1 巻 3 号 p. 109-124
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーWeight ratios of organic carbon to nitrogen in plankton, detritus settled at 25.5 m through 28.5 m water depths, and bottom surface sediments in Lake Kizaki-ko (max. depth: 28.5 m) are 5.7, 10.7 and 15.5 respectively. This suggests that in the lake water the nitrogenous fraction of dead planktonic material is more easily mineralized microbiologically than the carbonaceous fraction. The seasonal observation of the chemical components in the lake water shows the following facts: (1) During the early stage of a stagnation period, nitrogen fixation is generally more active than denitrification. On the contrary, denitrification gradually exceeds nitrogen fixation with the progress of stagnation. (2) At the end of the stagnation period, the amount of denitrified N2 is considerably large as compared with those of the other mineralized nitrogenous compounds, and the denitrification constitutes the dominant process determining nitrogen metabolism in the lake water. (3) The average ratio of total mineralized carbon to nitrogen at the end of the stagnation period is 3.5, a value considerably smaller than the corresponding value for plankton, 5.7. This fact supports the view that the greater ease for the mineralization of nitrogenous fraction in dead planktonic material as compared with that of carbonaceous fraction causes the increase in the ratio of org.C/org.N of organic detritus from upper water layers towards the bottom. (4) The mineralization rates of carbon and nitrogen in the organic detritus in the lake water are 51%/y and 76%/y respectively.抄録全体を表示PDF形式でダウンロード (7282K) -
Yoshio Sugiura, Hirozo Yoshimura1967 年 1 巻 3 号 p. 125-130
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーThe amount of total carbon dioxide estimated from pH and alkalinity was plotted against AOU. Results obtained were compared with those of a phosphate vs. AOU plot previously reported by the present authors. As a result, the following pints were confirmed: 1) The relationship between total carbon dioxide and AOU is given by a straight line with a slope of about 100/270 in an atomic ratio of carbon to oxygen for a group of waters with equal chlorinity and temperature. 2) The atomic ratio of carbon to phosphorus of about 100 to 1 obtained from the comparison of the ratios of ΣCO2 to AOU and P to AOU coincides with the C to P ratio given by FLEMING for a composite plankton sample. 3) Total carbon dioxide consists of three components; oxidative total carbon dioxide, reserved total carbon dioxide proportional to chlorosity (major portion of reserved total carbon dioxide) and reserved total carbon dioxide independent of chlorosity (minor portion of reserved total carbon dioxide). 4) Chlorosity-independent portion of reserved total carbon dioxide, as well as reserved phosphate, is remarkably more abundant in the Oyashio waters than in the Kuroshio waters.抄録全体を表示PDF形式でダウンロード (2608K) -
Ken Shibata, Tamotsu Nozawa1967 年 1 巻 3 号 p. 131-137
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーK-Ar age determinations were made on 13 samples (biotites and whole rocks) from granitic rocks in the Outer Zone of Southwest Japan. The ages range from 12 to 15 m.y. and are correlated to late Miocene, and generally agree with geological evidences. Supposedly these granitic rocks were emplaced during the period of uplift in the late Miocene.抄録全体を表示PDF形式でダウンロード (2829K) -
Haruhisa Ogita, Nobuyuki Nakai, Shinya Oana1967 年 1 巻 3 号 p. 139-148
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーConcentrations of total, soluble and insoluble Cl were determined for various sedimentary rocks from differing localities and ages with a distillation method examined by the authors. Rock samples were investigated with an X-ray diffractometer and a microscope. The followings were proved: (1) Tertiary tuffaceous sandstones have considerable amounts of ins. Cl, while non tuffaceous sandstones have little. Ins. Cl of these rocks is contained mostly in glassy tuffaceous material and not in clays and crystals such as quartz or feldspar. Ins. Cl content of the Tertiary sandstones from the same locality varies according to the proportion of glassy material, clay minerals and crystals. (2) Sedimentary rocks of Permian age show very low concentrations of ins. Cl without regard to rock types. This means that ins. Cl has been leached out during weathering, diagenesis or recrystallization. (3) Ins. Cl content of clays is nearly zero, Cl being leached out when rocks alter to clays. (4) There are two types of tuffs. One retaines glassy material and has a considerable amount of ins. Cl. The other has altered to clays, contains no glassy material and reveals almost no ins. Cl.抄録全体を表示PDF形式でダウンロード (4381K) -
Hiroshi Nagasawa, Hiroshi Wakita1967 年 1 巻 3 号 p. 149-154
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーPDF形式でダウンロード (2452K)
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