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  • 鹿野 美弘, 櫻井 徹朗, 小松 健一, 山田 浩之, 斉藤 謙一
    Chemical and Pharmaceutical Bulletin
    1990年 38 巻 4 号 1082-1083
    発行日: 1990/04/25
    公開日: 2008/03/31
    ジャーナル フリー
    Two new polyacetylene compounds (
    4
    E
    ,
    6
    E
    , 12
    E
    )-
    1
    -acetoxy-3-isovaleryloxytetradeca-
    4
    ,
    6
    , 12-trien-
    8
    , 10-diyn-14-ol (
    B
    ), and (
    4
    E
    ,
    6
    E
    , 12
    E
    )-
    1
    -acetoxy-3-(2-methylbutyryloxy)tetradeca-
    4
    ,
    6
    , 12-trien-
    8
    , 10-diyn-14-ol (C) have been isolated along with (
    4
    E
    ,
    6
    E
    , 12
    E
    )-
    1
    -acetoxy-3-senecioyloxytetradeca-
    4
    ,
    6
    , 12-trien-
    8
    , 10-diyn-14-ol (A) from Atractylodes Rhizome (Karabyakujutu). The structures of these compounds were determined on the basis of their spectral data.
  • Suguru TAKATSUTO, Kiyomi KOBAYASHI, Tsuyoshi WATANABE, Hiroki KURIYAMA, Tokuo FURUSE
    Agricultural and Biological Chemistry
    1988年 52 巻 12 号 3217-3218
    発行日: 1988年
    公開日: 2006/04/05
    ジャーナル フリー
  • 汪 発武, 佐々 恭二, 福岡 浩
    地盤工学会論文報告集
    2000年 40 巻 1 号 35-46
    発行日: 2000/02/15
    公開日: 2008/02/29
    ジャーナル フリー
    By employing an undrained cyclic loading ring-shear apparatus, a series of tests to reproduce the dynamic behavior of the Nikawa landslide induced by the January 17, 1995 Hyogoken-Nambu earthquake, is conducted. The test sample is Osaka-group coarse sandy soil taken from the landslide. The initial stress condition acting on a soil element in the sliding surface is applied to the sample. Based on the seismic records monitored at the JR Takarazuka Station, the input seismic wave is synthesized to reproduce the seismic stress acting on the sliding surface. The test results show that the soil failed due to the dynamic loading of the earthquake. The most important results are the excess pore water pressure generation and the acceleration of shear displacement continuing after the main shock. Combined with the grain crushing at the shear zone and the volume reduction in the drained constant-speed ring-shear test, the mechanism of this landslide is interpreted as, shear displacement causing grain crushing in the shear zone and volume reduction, and then resulting in a localized liquefaction phenomenon, "sliding-surface liquefaction". This geotechnical simulation test provides a reasonable interpretation of this highly mobile landslide.
  • Tsuyoshi WATANABE, Hiroki KURIYAMA, Tokuo FURUSE, Kiyomi KOBAYASHI, Suguru TAKATSUTO
    Agricultural and Biological Chemistry
    1988年 52 巻 8 号 2117-2118
    発行日: 1988年
    公開日: 2006/04/05
    ジャーナル フリー
  • 佐藤 敬之輔
    デザイン学研究
    1970年 1970 巻 11 号 45-55
    発行日: 1970/03/30
    公開日: 2017/07/25
    ジャーナル フリー
    [
    1
    ] The purpose of this reserch is to make clear what type of design can give good effects to win the high readership score. At the begining I had to know what factors decide the readership score, and how to change the quality of the desing into numerical value. I have used the method of multi-dimentional analysis with the help of a computer, and got the estimation formula, with 7 kinds of factors, as follows ; A^^〜=
    B
    +C+
    D
    +K+aE+
    bF
    +cG. A^^〜=estimated values of the readership score.
    1
    )
    B
    , C,
    D
    , K : these four factors are given as category values (so we call them); each factor is classified into several categories.
    B
    =week day, classified into 7 categories. C=pages of a newspaper, which are characterized by the kinds of articles, news, and the other reading matters, classified into
    22
    categories.
    D
    =kinds of goods and trades of the advertizement, classified into 14 catedories. K=constants, given to each 13 surveys. 2)
    E
    , F, G : these factors are given as numerical values. G=area of advertizement, measured by the unit of column in the whole page length, being classified into
    6
    kinds of area (2.
    5
    , 3.
    5
    ,
    5
    , 7, 10, 15) and 15 column means a whole page, about 2,000cm^2.
    E
    , F are the marks obtained in the design of advertizements.
    E
    =sum of the marks obtained in each design element on the advertizement. F=the marks obtained on the whole effect of the design. 3) a,
    b
    , c : coefficients Using the above formula with the category values and the coefficients, we can obtain the naked design effect from the actual value A of readership score: aE+
    bF
    =A-(
    B
    +C+
    D
    +K+cG). In this research, I used
    1
    ,829 data of readership score from 1960 to 1968, being obtained by 13 survevs, spring and autumn twice a year. The sample of size each survey was 3,541, 2,251, or 200 in the other 11 surveys. Multiple correlation coefficient between the estimated value A^^〜 and the actual value A is 0.951. The table 2^* shows the contribution indexes of each factor by 3 kinds of expression-(
    1
    ) Range : the absolute difference between the maximum and the minimum category values, (2) Standard deviations of the category values, (3) Partial correlation coefficient : the relationship between the actual values A and each factors. *see the table 2 in the thesis in Japanese. [2] The important point was in the determination of the values of
    E
    , F.
    E
    is the sum of the marks obtained in each design element, classified into four kinds :
    E
    =
    E
    _
    1
    +
    E
    _2+
    E
    _3+
    E
    _
    4
    . design elements [table]
    E
    _
    1
    ,
    E
    _2,
    E
    _3,
    E
    _
    4
    , these values have the
    5
    grades, as 0,
    1
    , 2, 3,
    4
    and 0 is given to the design that has no attractive effect or no applicable element. And
    E
    obtain the marks of 0 to
    9
    grades as the sum of them. The values of F have also
    5
    grades, 0 to
    4
    . The principles to determine the values of
    E
    , F are as follows : a) The marks obtained of
    E
    , F must be the relative values among the each survey, and at the same time, they must have constancy within the same survey-the same elements of design must win the same marks obtained.
    b
    ) They must be determined as to win the highest multiple correlation coefficient, when they are put into the estimation formula. c) They must be reasonable. In order to justify them, we must carry many researches on the actual condition. The frequency of accurence of each grade of
    E
    , F values, as the table
    5
    -
    4
    , and
    5
    -
    5
    in the thesis in Japanese.
  • 藤井 弘章, 国政 華菜, 難波 明代, 横溝 隆之, 西村 伸一, 島田 清, 堀 俊男, 西山 竜朗
    地盤工学会論文報告集
    2000年 40 巻 6 号 117-131
    発行日: 2000/12/15
    公開日: 2008/02/29
    ジャーナル フリー
    This study was performed to clarify which factors affected damage to tame-ike (small embankment dams for irrigation) in Hokudan Town as a result of the January 17, 1995 Hyogoken-Nambu earthquake. Factors were assumed to be : Location (
    e
    .g., Distance to Epicenter, etc.), Structure (
    e
    .g., Angle to Nearest Fault, Embankment Volume, etc.), Soil Properties of Embankment, Geology of Dam Site and History (Era of Construction, Repaired, etc.). Multivariate statistical analyses were performed for documentary data (damaged : 181, undamaged : 328). Ordinary statistical analyses were conducted for the data investigated in situ for soil properties of the embankment. The results show that the factors causing damage to dam are : (
    1
    ) Nearest Fault (Nojima, Mizukoshi and
    D
    2), (2) Distance to Nearest Fault (less than 500 m), (3) Distance to Epicenter (approximately
    8
    to 14 km, which almost agrees with the location of seismic intensity 7 JMA), (
    4
    ) Elevation of Dam Site (higher than 100 m), (
    5
    ) Embankment Volume (the greater the volume the more damage was caused), (
    6
    ) Direction of Dam Axis (normal or diagonal to the epicenter or to nearest the fault), (7) Plan View of Dam Axis (3 or
    4
    axes), (
    8
    ) Surface Geology of Dam Site (non-cohesive soil type ground), (
    9
    ) Era of Construction (prior to 1891) and (10) Soil Properties of Embankment (sand, not silty sand or gravel, penetration resistance that is 10% smaller than the undamaged dams).
  • 堀 幹夫, 片岡 貞, 清水 洋, 小野木 和弘
    YAKUGAKU ZASSHI
    1978年 98 巻 9 号 1189-1197
    発行日: 1978/09/25
    公開日: 2008/05/30
    ジャーナル フリー
    As a fundamental study on dibenzothiepins, reaction of 11-phenyl-
    6
    , 11-dihydrodibenzo [
    b
    ,
    e
    ] thiepin-11-ol (10) or 11-chloro-11-phenyl-
    6
    , 11-dihydrodibenzo [
    b
    ,
    e
    ] thiepin (14) with triphenylmethyl cation or
    SbCl5
    was examined under various conditions. 11-Phenyl-
    6
    , 11-dihydrodibenzo [
    b
    ,
    e
    ] thiepin-11-ylium salt (
    8
    ) was isolated as a black powder (perchlorate) and a green powder (hexachloroantimonate), but
    BF4
    salt was obtained only as a solution. Treatment of the hexachloroantimonate with excess of
    SbCl5
    was found to result in a novel dehydrocyclization reaction to give selectively
    9
    , 13
    b
    -dihydrofluoreno [
    1
    ,
    9
    a,
    9
    -c,
    d
    ] [2]-benzothiepin-13
    b
    -ylium hexachloroantimonate (19). Some discussions were made on the mechanism of the formation of 19.
  • Keishi Hata, Fuyuki Sugawara, Naganori Ohisa, Saori Takahashi, Kazuyuki Hori
    Biological and Pharmaceutical Bulletin
    2002年 25 巻 8 号 1040-1044
    発行日: 2002年
    公開日: 2002/08/01
    ジャーナル フリー
    We screened the differentiation-inducing activities of 39 mushroom extracts from Akita prefecture, Japan, on the mouse osteoblastic cell line, MC3T3-
    E
    1
    . Sixteen phosphate buffered saline (PBS),
    8
    boiled PBS, 14 ethanol and 12 methanol extracts induced alkaline phosphatase (ALP) activities, an indicator of MC3T3-
    E
    1
    cell differentiation. The enzyme activities were markedly induced by extracts of Tricholoma auratum, and we isolated the active compound from methanol extracts of this mushroom. Physical data for the isolated active compound were identical to those for (
    22E
    ,24R)-ergosta-7,
    22
    -diene-3β,
    ,
    -triol (
    1
    ).
    1
    induced ALP activities of MC3T3-
    E
    1
    cells and promoted cell proliferation. To investigate the relationships between the chemical structure and differentiation-inducing activity of the compound, ALP-inducing activities of MC3T3-
    E
    1
    cells by
    1
    , ergosterol (2), ergocalciferol (3), cholesta-3β,
    ,
    -triol (
    4
    ), 7-dehydrocholesterol (
    5
    ) and cholecalciferol (
    6
    ) were tested. The enzyme activities of MC3T3-
    E
    1
    cells were increased 3.0-fold by 10 μM
    1
    and 2.
    4
    -fold by 10 μM
    4
    . However, 2, 3,
    5
    and
    6
    did not induce MC3T3-
    E
    1
    cell ALP activity at 0.
    1
    —10 μM. These results suggested that the OH groups at C-
    5
    and/or C-
    6
    of
    1
    and
    4
    played an important role in their differentiation-inducing activities on MC3T3-
    E
    1
    cells. Furthermore,
    1
    suppressed induction of MC3T3-
    E
    1
    cell apoptosis by serum starvation.
  • 尾形 強, 佐藤 治代, 吉田 弘, 猪川 三郎
    日本化学会誌(化学と工業化学)
    1974年 1974 巻 2 号 382-385
    発行日: 1974/02/10
    公開日: 2011/05/30
    ジャーナル フリー
    The Beckmann rearrangement of aliphatic ketone oximes, R(CHs)C=NOH (R=Et (
    1
    ); n-Pr (2); iso-Pr (3); iso-Bu (
    4
    )), with polyphosphoric acid (PPA), polyphosphate ester (PPE), and ester of phosphoric acid (2 P-
    5
    R) was carried out and migratory ratios ((a)/(
    b
    ) in eq. (
    1
    )) were determined, The results are shown in Fig.
    1
    , 2, and 3, respectively.
    In Fig.
    1
    and 2, the migratory ratios decrease with reaction time and nearly approach to the ratios of anti-alkyl form/syn-alkylform in benzene(A
    1
    ) or DMSO(A2)except for (3) (See Table
    1
    ). From this fact, it has been found that PPA and PPE are inactive for isomerization of the oximes andanti-alkyl oximes rearrange faster than syn-alkyl ones. ln the case of (3), migratery ratios are smaller than Ai or A2. As acetonitrile is detected by GLC, it is presumed that fission has been occurred simultaneously with rearrangement in anti-alkyl oxime (eq. (3)). In the case of 2 P-
    5
    R, all modes of the reaction arethe same as in above, except that the rate of fission is tnuch faster than that in PPA and PPE.
    The reaction of anti-alkyl ketone oximes having a bulky grouphas been greatly influenced by the use of sterically demanding catalysts such asPPA, PPE, and 2 P-
    5
    R.
  • Giorgio Gabella
    Journal of Smooth Muscle Research
    2021年 57 巻 19-34
    発行日: 2021年
    公開日: 2021/09/17
    ジャーナル フリー

    The characteristic mechanical activities of the smooth muscles found in all organs of the body are highly variable and depend mainly on the spatial arrangement of the muscle cells and the stroma: mass, orientation, relationships, links, constraints, which are deployed in various configurations. These structural features are examined here for their mechanical relevance, in light and electron microscopic views of several muscles of viscera and blood vessels, in a selection of mammalian species. Smooth muscles are incompressible and therefore maintain constant volume. They do not have available space and any movement of a part requires displacement of another part. Most of them have no terminations or points of attachment, and in hollow organs such as intestines, blood vessels and uro-genital tract they usually form structures closed onto themselves, such as rings or bag-like containers In these situations, changes in the size of the lumen is achieved very efficiently by a concentric inward enlargement that accompanies muscle contraction. The longitudinal arrangement of collagen blocks an elongation of small blood vessels upon contraction, further enhancing the efficiency of lumen reduction. In other muscles, links between layers and special arrangements of the stroma allow both shortening and elongation of a tubular organ to occur. The mechanics of smooth muscles has many characteristic features (some unique, some shared with those of hydrostats, some at variance with other muscles) and histological data are a contribution to our understanding of these properties.

  • Giorgio Gabella
    Journal of Smooth Muscle Research
    2019年 55 巻 34-67
    発行日: 2019年
    公開日: 2019/11/09
    ジャーナル フリー

    All the cells of rat detrusor muscle fall into one of five ultrastructural types: muscle cells, fibroblasts, axons and glia, and vascular cells (endothelial cells and pericytes). The tissue is ~79% cellular and 21% non-cellular. Muscle cells occupy 72%, nerves ~

    4
    % (
    1
    /3 axons, 2/3 glia), and fibroblast >3% of space. Muscle cells (up to
    6
    µm across and ~600 µm long, packed to almost 100,000 per mm2) have surface-to-volume ratio of 2.
    4
    µm2/µm3 ~93% of cell volume is contractile apparatus, 3.
    1
    % mitochondria and 2.
    5
    % nucleus. Cell profiles are irregular but sectional area decreases regularly towards either end of the cell. Muscle cells are gathered into bundles (the mechanical units of detrusor), variable in length and size, but of constant width. The musculature is highly compact (without fascia or capsule) with smooth outer surfaces and extensive association and adhesion between its cells. Among many types of intercellular contact and junction, digitations are very common, each muscle cell issuing minute finger-like processes that abut on adjacent cells. Sealed apposition are wide areas of specialized contact, possibly forming a chamber between two muscle cells, distinct from the extracellular space at large (stromal space). The innervation is very dense, virtually all intramuscular axons being varicose (including afferent ones). There are identifiable neuro-muscular junctions on each muscle cell, often several junctions on a single cell. There are also unattached terminals. Fibroblasts (involved in the production of collagen), ~
    1
    % of the total number of cells, do not make specialized contacts.

  • Mohd Suhail, Mohd Faizul Suhail, Hina Khan
    Journal of Clinical Biochemistry and Nutrition
    2008年 43 巻 3 号 210-220
    発行日: 2008年
    公開日: 2008/10/31
    ジャーナル フリー
    We compared three groups of pregnant women: placebo with normotensive women, group A which included preeclamptics, and group
    B
    which comprised preeclamptics who were supplemented their diets with vitamins C and
    E
    . MDA increased from
    6
    .
    22
     ± 2.
    8
    (placebo) to
    8
    .48 ± 
    1
    .2 (A) and
    8
    .02 ± 
    1
    .
    8
     nmol/gHb (
    B
    ). NO concentrations were enhanced from 19.3 ± 
    4
    .2 (P) to 23.
    8
     ± 
    6
    .
    4
    (A) and 24.
    1
     ± 
    5
    .
    4
     μmol/L (
    B
    ). GSH contents were decreased from 10.42 ± 2.
    81
    (P) to
    8
    .02 ± 2.92 (A) and
    9
    .39 ± 
    1
    .02 μmol/g Hb (
    B
    ), whereas GSSG concentrations increased from 0.98 ± 0.28 (P) to
    1
    .24 ± 0.29 (A) and
    1
    .08 ± 0.12 μmol/g Hb (
    B
    ). SOD activity decreased 23% in A and 14% in
    B
    ; GRx decreased 27% in A and
    5
    .
    5
    % in
    B
    ; GPx decreased 12% in A and
    9
    .
    6
    % in
    B
    . Catalase activity, however, increased 27% in A and 29% in
    B
    as compared to control. Thus, we conclude that the use of vitamins C and
    E
    should be considered for the control of certain important biochemical indices during the development of preeclampsia; however, further studies are needed to develop methods for the prevention of preeclampsia in women at high risk.
  • Özkan ASLANTAŞ, Ebru Şebnem YILMAZ
    Journal of Veterinary Medical Science
    2017年 79 巻 6 号 1024-1030
    発行日: 2017年
    公開日: 2017/06/16
    [早期公開] 公開日: 2017/04/27
    ジャーナル フリー

    This study aimed to determine the prevalence of fecal carriage of extended spectrum β-lactamase (ESBL) and/or plasmidic AmpC β-lactamase (pAmpC) producing Escherichia coli among dogs (n=428) in Turkey. Polymerase chain reaction (PCR) and sequencing were used to characterize genes encoding β-lactamase and plasmid mediated quinolone resistance (PMQR). Antimicrobial susceptibility testing and PCRs for virulence genes and phylogenetic groups were also performed. Cefotaxime resistant

    E
    . coli isolates were detected in 95 (
    22
    .2%) of the swab samples. Sequencing analysis results showed occurrence of various β-lactamase genes: blaCTX-M-15 (62), blaTEM-
    1b
    (42), blaCMY-2 (
    22
    ), blaCTX-M-3 (16), blaCTX-M-
    1
    (15), blaOXA-
    1
    (
    9
    ) and blaSHV-12 (3) alone or in combination. The most frequently encountered phylogenetic group was group
    A1
    (35.
    8
    %), followed by group
    D2
    (
    22
    .
    1
    %),
    B
    1
    (15.
    8
    %),
    D1
    (
    9
    .
    5
    %), A0 (7.
    4
    %),
    B22
    (
    5
    .3%) and
    B23
    (
    4
    .2%), respectively. PMQR genes, aac(
    6
    ’)-Ib-cr,
    qnrS1
    and qnrB10 were detected in 25.3, 10.
    5
    and
    1
    .
    1
    % of the isolates, respectively. While all isolates were susceptible to imipenem and amikacin, resistance rates to non-β-lactam antibiotics ranged from 20.0% for tobramycin to 56.
    8
    % for tetracycline. The virulence genes were only detected in 34 (36.2%) of the isolates and this isolates carried single or various combination of virulence genes of iucD, papC, papE, f17a-A and eaeA. Four isolates were identified as human virulent pandemic CTX-M-15 producing
    E
    . coli
    clone O25
    b
    :ST131/
    B
    2. To the best of our knowledge, this is the first study to show fecal carriage of ESBL/pAmpC type β-lactamase producing
    E
    . coli
    isolates among dogs in Turkey.

  • 黒川 美貴雄, 吉田 耕治, 永井 保嵩, 宇野 準
    Chemical and Pharmaceutical Bulletin
    1983年 31 巻 12 号 4312-4318
    発行日: 1983/12/25
    公開日: 2008/03/31
    ジャーナル フリー
    Two new partially saturated tricyclic ring systems,
    6
    ,
    6
    a, 7,
    8
    ,
    9
    , 10, 10a, 11-octahydro-11-oxodibenz [
    b
    ,
    e
    ] oxepins (3a and 3
    b
    ), and -thiepins (
    4
    a and
    4
    b
    ) were synthesized. Compounds
    4
    a and
    4
    b
    were desulfurized to give a pair of isomeric 2-methylbenzoylcyclohexanes (10a and 10
    b
    ). Deuterated
    4
    a and
    4
    b
    (11a and 11
    b
    ) were prepared starting from butadiene-
    d6
    (12). The stereochemical features of 3a (trans), 3
    b
    (cis),
    4
    a (trans) and
    4
    b
    (cis) are compared with those of 10a, 10
    b
    , 11a and 11
    b
    on the basis of proton nuclear magnetic resonance data.
  • /, 三浦 哲彦, NORIHIKO MIURA
    地盤工学会論文報告集
    1996年 36 巻 4 号 11-22
    発行日: 1996/12/15
    公開日: 2008/02/29
    ジャーナル フリー
    A new analytical method is proposed for determining the inextensible grid reinforcement pullout resistance and pullout force/pullout displacement curve by using basic backfill soil and grid reinforcement properties. The pullout skin friction resistance/pullout displacement relationship is simulated by linear elastic-perfectly plastic model. A hyperbolic model has been proposed to represent the pullout bearing resistance/pullout displacement relationship in which the maximum bearing resistance of a single bearing member is determined using a new bearing capacity equation proposed in this paper. The influences of the grid bearing member spacing ratio, S/
    D
    , the bearing member deflection rigidity, and the pullout softening behavior on the mobilization of pullout bearing resistance are explicitly included in the proposed model. Good agreement has been obtained between calculated values and laboratory test results.
  • 澁谷 啓, 三田地 利之, 黄 聖春
    地盤工学会論文報告集
    2000年 40 巻 3 号 87-100
    発行日: 2000/06/15
    公開日: 2008/02/29
    ジャーナル フリー
    Natural sedimentary clays exhibit ageing effects on their behaviour when subjected to both consolidation and shearing. Attempts to characterising the in-situ 'structure'of soft marine clays have been made in case studies performed in Ariake (Japan) and in Bangkok (Thailand), each showing a typical profile of aged clay-structure with depth reflecting its site-specific geological consolidation history. In each site, profiles of Atterberg limits, natural water content, overconsolidation ratio (OCR), quasi-elastic shear modulus Gmax and the undrained shear strength cu with depth were attained from various laboratory tests, together with the a comparable profile of quasi-elastic shear modulus from insitu seismic survey Gf. Quantitative assessment of the aged clay-structure was made by using two different measures, metastability index MI (G) and the soil constant reflecting structure S (Jamiolkowski et al., 1994). The profiles of MI (G) and the S-value with depth were both determined based on the corresponding Gmax behaviour of the reconstituted sample. "Disturbance"of laboratory samples retrieved by using two different samplers (i.
    e
    ., Laval and Japanese thin-walled samplers) with two different sampling techniques (i.
    e
    ., pre-boring and displacement methods) was discussed. A new approach to estimate cu"in the ground", termed by the authors the MILK (Metastability Index coupled with Laboratory Ko test) method, is proposed. A trial of the MILK-method is demonstrated in soft Bangkok clay, the texture of which is similar to "soft cheese".
  • M. K. Banerjee, P. S. Banerjee, S. Datta
    ISIJ International
    2001年 41 巻 3 号 257-261
    発行日: 2001/03/15
    公開日: 2007/05/31
    ジャーナル フリー
    A boron treated copper bearing HSLA steel containing austenite formers like manganese and nickel, somewhat lower in amount than that in HSLA 100 variety of steel is chosen for the study. The role of thermomechanical processing on the microstructure and mechanical properties of the above steel has been investigated. Differential scanning calorimetric study is carried out for understanding the precipitation behaviour of copper in HSLA steel under the influence of boron. The microstructure of the experimental steel is found to consist of laths of martensites and bainite. MA constituents of ribbon like morphology are observed at the lath boundaries. Higher strength properties of the steel are attributed to the presence of finely distributed precipitates of copper and microalloy carbides.
  • 香山 滉一郎, 森下 政夫, 張 国鋒
    粉体および粉末冶金
    2006年 53 巻 5 号 419-429
    発行日: 2006年
    公開日: 2006/12/19
    ジャーナル オープンアクセス
    The phase diagrams of the Ni-Mo-
    B
    and Ni-W-
    B
    ternary systems in the region of less than 50mol%
    B
    were constructed by thermodynamic calculation, based on the data obtained by thermodynamic measurement of the related materials. We found three ternary eutectic points and three or two ternary peritecto-eutectic points as follows:
    E1
    :L (1365K, 71.
    5
    mol%Ni-
    6
    .0mol%Mo-
    22
    .
    5
    mol%
    B
    )=(Ni)+
    Ni3B
    +
    NiMo2B2

    E2
    :L (1355K, 62.
    5
    mol%Ni-2.
    5
    mol%Mo-30.
    5
    mol%
    B
    )=
    Ni3B
    +
    Ni2B
    +
    NiMo2B2

    E3
    :L (1445K, 42.0mol%Ni-30.
    6
    mol%Mo-10.3mol%
    B
    )=(Ni)+NiMo+
    NiMo2B2

    P1
    :L (1812K, 34.
    9
    mol%Ni-42.3mol%Mo-
    22
    .
    8
    mol%
    B
    )+MoB=
    Mo2B
    +
    NiMo2B2

    P2:L (1633K, 42.3mol%Ni-40.
    4
    mol%Mo-17.3mol%
    B
    )+Mo=
    Mo2B
    +
    NiMo2B2

    P3:L (1812K, 53.
    5
    mol%Ni-33.7mol%Mo-12.
    8
    mol%
    B
    )+Mo=NiMo+
    NiMo2B2

    E1
    :L (1622K, 51.0mol%Ni-31.
    6
    mol%W-17.
    4
    mol%
    B
    )=(Ni)+W+
    NiW2B2

    E2
    :L (1260K, 71.0mol%Ni-7.0mol%W-
    22
    .0mol%
    B
    )=(Ni)+
    Ni3B
    +
    NiW2B2

    E3
    :L (1291K, 65.
    4
    mol%Ni-
    4
    .
    8
    mol%W-29.
    8
    mol%
    B
    )=
    Ni2B
    +
    Ni3B
    +
    NiW2B2

    P1
    :L (2115K, 23.
    8
    mol%Ni-43.
    1
    mol%W-33.
    1
    mol%
    B
    )+WB=
    W2B
    +
    NiW2B2

    P2:L (1657K, 48.
    9
    mol%Ni-33.
    1
    mol%W-18.0mol%
    B
    )+
    W2B
    =W+
    NiW2B2

    The calculated phase diagrams are expected to be useful for the development of new Ni-based heat-, corrosion- or wear-resistance alloys.
  • 澁谷 啓, 田中 洋行
    地盤工学会論文報告集
    1996年 36 巻 4 号 45-55
    発行日: 1996/12/15
    公開日: 2008/02/29
    ジャーナル フリー
    An empirical equation in use for estimating the pseudo-elastic shear modulus, Gf, of subsoil, associated with shear strains less than 0.001% is proposed in this paper. In a series of in-situ seismic cone tests performed nationwide, the profiles of both Gf and the in-situ void ratio,
    e0
    , with depth were successfully characterised at five sites, each comprising a soft clay layer deposited in the Holocene era. The database which comprised the original data from the field and laboratory tests, coupled with similar information on well-documented Holocene clay deposits in Europe, was statistically analyzed in attempts to determine a generalised relationship with which Gf of soft clay may be reasonably estimated only from routinely available borehole data; that is
    e0
    and the current geostatic effective overburden pressure, σ'v. An empirical relationship, Gf=
    5
    , 000
    e0
    -
    1.5
    √(σ'v) (kPa), was derived from the statistical analysis applied to data from seven different clays worldwide, for which
    e0
    extended over a range between
    1
    and
    5
    , and the overconsolidation ratio ranged roughly between
    1
    and 2. The applicability of the proposed relationship was evaluated for two case records, each in which the clay exhibited unusual behavior; i.
    e
    ., the undrained shear strength remained more or less constant with depth due to the existence of artesian pressure at one site, and, at the other, Gf decreased, whereas
    e0
    increased, with depth. It was demonstrated that even in these clay deposits exhibiting exceptional profiles, the proposed relationship was capable of predicting Gf with a reasonable accuracy by determining the profiles of
    e0
    and σ'v with depth. In addition, the prediction when compared to Gmax from carefully performed laboratory cyclic tests, yielded a better estimate of Gf from the in-situ seismic survey. Despite the fact that the empirical relationship was initially designated to estimate Gf of soft clays, it may be equally applicable to sandy deposits. This was verified by comparing it to similar, and well-established, relationships developed for sands. A case record as such is also described for a loose sand deposit at Higashi-Ohgishima in Tokyo Bay which was placed in 1960's by land reclamation.
  • 西村 聡, 東畑 郁生, 本多 剛
    地盤工学会論文報告集
    2002年 42 巻 4 号 89-98
    発行日: 2002/08/15
    公開日: 2008/02/29
    ジャーナル フリー
    The rate dependent nature of liquefied sand was investigated by laboratory shear tests. Since previous experience has revealed the many difficulties inherent in maintaining the state of liquefaction of a sandy specimen, new measures were attempted. The test results indicate that the measured shear stress consists of frictional and rate dependent components, and a viscosity coefficient was assessed from the latter component. The measured viscosity varies with the rate of strain as well as the magnitude of strain itself. A similar test on a dry specimen revealed less viscosity and implied that a major part of rate dependency comes from the behavior of pore liquid in the case of water-saturated sand. It was interesting, moreover, that sand with fines was of less viscosity. Finally, a numerical analysis was conducted on a real liquefaction-induced ground deformation and the results were consistent with the observation.
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