※一部利用できない機能があります
| 1.
論文 |
論文
|
Yamamoto, Masayoshi ; Matsui, Masao ; Igarashi, Shuichi ; Yoshioka, Mitsuo ; Hayakawa , Hironobu ; Kitagawa, Sadaharu ; 山本, 政儀 ; 松井, 正夫 ; 五十嵐, 修一 ; 吉岡, 満夫 ; 早川, 博信 ; 北川, 貞治
概要:
金沢大学環日本海域環境研究センター<br />The concentrations of 239Pu and 137Cs due to fall-out, and 60Co originating from the nuclear powe
…
r reactor in the sediments sampled at Urazoko Bay, Fukui Pref., Japan, were determined and their correlation with the particle size or the amount of glycerol adsorbed on the sediments as a measure of surface area of the sediment particles were examined. By the size segregation of sediment, the contents of 239Pu, 137Cs and 60Co were found to reach to the highest value in the fraction below 37 μm in diameter. The concentrations of these radionuclides for each size fraction were directly proportional to the amount of glycerol adsorbed on the sediment particles. Based on these facts, the normalization of the concentration of these artificial radionuclides by the amount of adsorbed glycerol was attempted. For the fraction below 0.5 mm in diameter of various sediments collected at around Urazoko Bay during 1975-1977. It was confirmed that the contents of 239Pu and 137Cs per unit amount of adsorbed glycerol were nearly constant, respectively. Furthermore, the pollution characteristics of 60Co in the sediments, such as the distribution and the accumulation, was clearly estimated by using such normalization.
続きを見る
|
||||
| 2.
論文 |
論文
|
2. Difference of Chromosome Exchanges Due to Mitomycin C between Normal and Pericentric lnv(9) Cells
Shiraishi, Yukimasa ; 白石, 行正
概要:
金沢大学解剖学第三<br />Several reports are available for the finding that mitomycin C (MMC) induces non-random chromosome exchan
…
ges in human cells (Nowell 1964 ; Cohen and Shaw 1964 ; Br¢ggerand Johansen 1972). It has been shown that the majority of exchanges occurs preferentially between the constitutive heterochromatin of homologous chromosomes, especially in the secondary constriction regions of chromosomes 1, 9 and 16. This may be a result of the association of these chromosome regions during interphase, either through regular somatic pairing (Rao and Nataraj an 1967) or through a particular gathering effect of MMC (Kobayashi 1960). There is little information on the mitotic feature of the somatic pairing in chromosomes with rearrangements, particulary with pericentric inversions of mammalian cells. The present study was attempted to test the effect of MMC on cells with pericentric inv (9), one of the polymorphic variations in man (Hansmann 1976; Shiraishi and Makino 1977), and to compare the frequency of MMC-induced exchanges between normal and pericentric inv (9) cells.
続きを見る
|
||||
| 3.
論文 |
論文
|
Komura, Kazuhisa ; Sakanoue, Masanobu ; Konishi, Kenji ; 小村, 和久 ; 阪上, 正信 ; 小西, 健二
概要:
金沢大学理学部付属低レベル放射能実験施設<br />Since Barnes et al. (1956) proposed the uraniumionium (230Th) method of dating, many works hav
…
e been performed for dating of fossil corals (Komura and Sakanoue, 1967; Bloom etal., 1974; Ku et al., 1974; and see the references therein). The 230Th method has a potential to estimate the absolute age back to about 300000 years. This method is one of the most reliable methods for a sample older than a few ten thousand years, since the half-life of 14C limits the applicable age back to about 40000 years. In order to determine 230Th age, activity ratios of 230Th/234U and 234U/238U must be measured. Alpha spectrometry has usually been performed to measure these isotopes. On the other hand, measurement of 230Th can be made indirectly by its daughter nuclide 222Rn by assuming radioactive equilibrium between 230Th and 226Ra (222Rn) (Nydal, 1975). If this assumption is acceptable, the 230Th can also be measured by 214Pb, 214Bi and 210Pb, the amount of which can be determined by y-spectrometry. Furthermore, 238U concentration can be determined by measuring low energy r-rays from its daughter nuclide 234Th. In this report, the non-destructive 226Ra/238U method is proposed for the dating of fossil corals by -spectrometry using a germanium detector Ge (Li) and a low energy photon spectrometer (LEPS). The non-destructive dating method has advantages over the conventional ones in that the elaborate and timeconsuming chemical procedures are unnecessary and no change in the chemical state occurs in the sample analyzed, hence, the same sample can be used for further investigation after the non-destructive measurement.
続きを見る
|
||||
| 4.
論文 |
論文
|
Tawada, Shinjun ; 多和田, 真淳
|
||||
| 5.
論文 |
論文
|
Naruhashi, Naohiro ; 鳴橋, 直弘
|
||||
| 6.
論文 |
論文
|
Kurita, Masahide ; 栗田, 正秀
|
||||
| 7.
論文 |
論文
|
Fukuda, Nahoko ; Tanishima, Kiyoh ; 福田, 直子 ; 谷島, 清郎
概要:
金沢大学医療技術短期大学部
|
||||
| 8.
論文 |
論文
|
小牧, 純爾 ; Komaki, Junji
概要:
金沢大学人間社会研究域人間科学系<br />Two groups of three male Japanese monkeys were given one of two modified forms of successive rever
…
sal training (SRT) in WGTA. Prior to usual SRT trials of each reversal, three information trials were introduced on which either baited positive stimulus (P stimulus group) or unbaited negative stimulus (N stimulus group) of new reversal was singly presented. Two-trial problems were given on three stages and LS problems on the last stage of the informed SRT's so as to assess the development of choice strategies. SRT group of the previous study was control group. N stimulus group was superior to SRT group in reversal performance and comparable to it in 2-trial and LS problems. P stimulus group, though superior to SRT group in reversal performance, was inferior to it in 2-trial and LS problems. It indicates that development of choice strategy needs something other than successful reversal performance. Implications of this and other findings were discussed on the assumption that level of attentiveness during training might be a determinant of strategy learning.<br />出版者の許可を得て登録
続きを見る
|
||||
| 9.
論文 |
論文
|
小牧, 純爾 ; Komaki, Junji
概要:
金沢大学人間社会研究域人間科学系<br />2 groups of 3 Japanese monkeys were given 3 training blocks of either 20 successive discrimination
…
reversals (SRT group) or overtraining of comparable trials (OT group) with WGTA. 2-trial problems were given on 3 stages and LS problems on the last stage of training. The development of choice strategies due to these trainings was assessed. SRT group was significantly superior to OT group in 2-trial as well as LS problems. This superiority was observed in both of baited and unbaited problems and revealed better learning of “winstay” and “lose-shift” strategies. OT group exhibited no improvement in “lose-shift” behavior. Conditions for strategy learning and discrepancies of this and the other studies were discussed.<br />出版者の許可を得て登録
続きを見る
|
||||
| 10.
論文 |
論文
|
Suzuki, Yasuyuki ; Itagaki, Eiji ; Mori, Hiromu ; Hosoya, Toichiro ; 板垣, 英治
概要:
The testosterone-binding globulin (TeBG) from bovine serum was purified by affinity chromatography and hydroxylapatite c
…
hromatography. The affinity column used was prepared by coupling 17α-carboxyethynyl-l7-hydroxy-4-androsten-3-one to aminoethyl-Sepharose. The compound was replaceable by 17α-carboxyethynyl-l7-hydroxy-5α-androstan-3-one, but not by testosterone 17-hemisuccinate, estradiol 17-hemisuccinate, or testosterone 3-(O-carboxy-methyl)oxime. The TeBG isolated was homogeneous on analytical polyacrylamide gel electrophoresis and equilibrium centrifugation. The protein was a glycoprotein having a molecular weight of 89, 500 and a carbohydrate content of 17%. The association constant (M-1) at 4°C was 1.1 × 108 and the number of binding sites per molecule was 0.8. Treatment with guanidine-HCI dissociated the protein into subunits having a molecular weight of 28, 400 (about one-third of that of the original molecule). SDS-gel electrophoresis showed that two of the three subunits were slightly larger than the other. The dissociation into subunits could also be accomplished by GEDTA treatment with concomitant loss of testosterone-binding activity. The activity and molecular size were reversibly restored by incubation with excess Ca2+.
続きを見る
|
