Proceedings of the Japan Academy, Series B

Isotopic Ages of the Cretaceous Tuff from the Manji Area, Hokkaido

Reiko HAMAMOTO, Yuichiro MIYATA, Masao FUTAKAMI, Kazushige TANABE

1980 Volume 56 Issue 9 Pages 545-550
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.545

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The Assignment of the Nucleolar Organizer in the Chromosomes of the Funa

Carassius, Cyprinidae, Pisces

Yoshio OJIMA, Takashi YAMANO

1980 Volume 56 Issue 9 Pages 551-556
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.551

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In six subspecies of Carassius auratus and Gold-fish including Carassius a. subsp., C. a. buergeri, C. a. grandoeulis, C. a. cuvieri, C. a. langsdorfii, the Chinese Funa (C. a, auratus) and the Wakin (C. a. auratus), the NORs patterns of chromosomes were comparatively investigated. The areas of intense silver deposition (Ag-NORs) were constantly and commonly associated with the short arms of the 12th largest submetacentric chromosomes in the varieties except C. a. langsdorfii. In C. a. langsdorfii there were two such elements among the median-sized submetacentric chromosomes. No remarkable sexual differences of the NORs was detected.

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Segregation of Karyotypes in the F₂ Generation of the Hybrids between Mauritius and Oceanian Type Black Rats with a Note on their Litter Size

Tosihide H. YOSIDA

1980 Volume 56 Issue 9 Pages 557-561
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.557

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The segregation ratio in F2 hybrids from Mauritius type black rats (2n, 42)×Oceanian type rats (2n, 38) and their litter size were studied. The average litter size of the F₂ offspring was 4.3±1.7. The segregation ratio of chromosome pair nos. 14 and 18 in the F₂ hybrids was nearly identical with the expected one. It was concluded that the Mauritius type black rats are very closely related to the Oceanian type rats on the bases of litter size and segregation ratio in the F₂ hybrids.

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Stimulation of Melanogenesis in Melanoma Cells Growing in Serum-Free Medium by Fetal Bovine Serum and Dimethylsulfoxide

Kunio IWATA, Naomichi INUI

1980 Volume 56 Issue 9 Pages 562-567
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.562

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Induction of Sister Chromatid Exchanges by Cyclophosphamide in Human Lymphocytes with Metabolic Activation

Kiyoshi INOUE, Tadayoshi SHIBATA, Shinichi MISAWA, Tatsuo ABE, Keiichi ...

1980 Volume 56 Issue 9 Pages 568-572
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.568

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Human leukocytes were treated with CPM for the establishment of the in vitro activating system to detect inactive mutagenic chemicals in the presence of S-9 mix. CPM caused a maximum increase in SCE-frequency after 60min incubation. Further, the frequency of SCEs was markedly increased by additional doses of CPM. It thus appears that chemicals requiring metabolicactivation induce SCEs in the human leukocyte test system.

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An Improved Preparation of β-Chloropropionacldehyde Acetal

Yasuhiko SATO, Shigehiko SUGASAWA

1980 Volume 56 Issue 9 Pages 573-575
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.573

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Deformylation of Formamides

Shinichi KODATO, Shigehiko SUGASAWA

1980 Volume 56 Issue 9 Pages 576-578
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.576

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Tetrahymena Histone Sequences and their Implications for Phylogeny of Protozoa

Hiroaki HAYASHI, Minoru NOMOTO, Koichi IWAI

1980 Volume 56 Issue 9 Pages 579-584
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.579

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The total and partial amino acid sequences of Tetrahymena histones H4 and H2B, respectively, have been determined. Comparisons of these sequences with those of mammals and pea suggest that the divergence of protozoa and higher eukaryotes is more ancient than the divergence of animals and plants.

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A Mutant of Tetrahymena with Non-Excitable Membrane

Mihoko TAKAHASHI, Hiroshi ONIMARU, Yutaka NAITOH

1980 Volume 56 Issue 9 Pages 585-590
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.585

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Effects of Ca Ion and ADP on Superprecipitation of Myosin B from Slime Mold, Physarum polycephalum

Kazuhiro KOHAMA, Keiko KOBAYASHI, Shohei MITANI

1980 Volume 56 Issue 9 Pages 591-596
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.591

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³¹P NMR Study of Neomycin Toxicity

Fumio HAYASHI, Hiroko INOUE, Taisaku AMAKAWA, Tohru YOSHIOKA

1980 Volume 56 Issue 9 Pages 597-602
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.597

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Molecular Cloning of a Complementary DNA of Phenobarbital-Inducible Cytochrome P-450 Messenger RNA from the Rat

Yoshiaki FUJII-KURIYAMA, Tadatsugu TANIGUCHI, Yuzuru MIZUKAMI, Masahar ...

1980 Volume 56 Issue 9 Pages 603-608
Published: 1980
Released on J-STAGE: October 06, 2006

DOIhttps://doi.org/10.2183/pjab.56.603

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