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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
  • Bo MYINT WIN, V. CHOA, K. S. WONG, C. I. TEH
    地盤工学会論文報告集
    2002年 42 巻 2 号 35-46
    発行日: 2002/04/15
    公開日: 2008/02/29
    ジャーナル フリー
    Two types of consolidation tests using a large consolidometer equipped with Linear Vertical Displacement Trans-ducers (LVDT), pore pressure transducers and total earth pressure cells were carried out. With these instruments, deformation behavior as well as pore pressure responses were monitored throughout the tests. The first type used two-step high pressure loading at 100 and 190 kPa. The second type used incremental step loading starting from an applied pressure of 12 kPa. In the high pressure loading test with 100 and 190 kPa, there was no pore pressure dissipation noted from half a day to more than 10 days, depending on the locations of the pore pressure transducers. However vertical displacement was measured during this period with no pore pressure dissipation. In the low pressure step loading test, the slurry continued to compress without any noticeable dissipation of excess pore pressure. The gain in effective stress was much lower than the applied pressure although large settlement had occurred. The lower bound values of undrained shear strengths measured by laboratory vane and fall cone were in direct proportion to the gain in effective stress. In addition, particle migration was evident from the laboratory measurements.
  • ST. CHRISTOULAS, G. BOUCKOVALAS, CH. GIANNAROS
    地盤工学会論文報告集
    2000年 40 巻 6 号 11-22
    発行日: 2000/12/15
    公開日: 2008/02/29
    ジャーナル フリー
    This paper describes the results of two instrumented axial loading tests on large scale model stone columns, constructed similarly to the prototypes with a technique which employs ordinary pile driving equipment. Kaolin was used to simulate natural soil conditions. Pressure cells and electric piezometers were used to monitor lateral stresses and pore pressures respectively, during loading. A factual report of the data and a direct evaluation with respect to the load-deformation response and the mode of failure of the stone columns is provided. Two deformation models are examined : a triaxial specimen expanding laterally under compression and a skin friction pile. Furthermore, a trilinear load-settlement relation is proposed for design purposes, based directly upon the results of the model tests.
  • 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
  • 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).
  • 鍛治 健司, 葛谷 昌之 /, RAYMONDN. CASTLE
    Chemical and Pharmaceutical Bulletin
    1970年 18 巻 1 号 147-156
    発行日: 1970/01/25
    公開日: 2008/03/31
    ジャーナル フリー
    2
    -Benzyl-
    4
    -chloro-
    5
    -mercapto-3 (
    2
    H)-pyridazinone (1) was heated in ethanol under reflux for 10 hours to form concurrently
    2
    , 7-dibenzyldipyridazo [
    4
    ,
    5
    -
    b
    :
    4
    ',
    5
    '-
    e
    ]-1,
    4
    -dithiin-1,
    6
    (
    2
    H, 7H)-dione (Ia) (57% in yield) and
    2
    ,
    8
    -dibenzyldipyridazo [
    4
    ,
    5
    -
    b
    :
    4
    ',
    5
    '-
    e
    ]-1,
    4
    -dithiin-1,
    9
    (
    2
    H,
    8
    H)-dione (IIa) (14% in yield). Assignment of the two products to the corresponding structures is established by their physico-chemical constants and chemical behaviors. The concurrent formation of the dipyridazo [
    4
    ,
    5
    -
    b
    :
    4
    ',
    5
    '-
    e
    ]-1,
    4
    -dithiin-1,
    6
    (
    2
    H, 7H)-dione and the -1,
    9
    (
    2
    H,
    8
    H)-dione were observed in, not only heating
    4
    -chloro-
    5
    -mercapto-3 (
    2
    H)-pyridazinones (1-3) in polar solvent, but warming
    4
    -mercapto-
    5
    -chloro-3 (
    2
    H)-pyridazinones (
    4
    -
    6
    ) in the presence of potassium carbonate in DMF. For the interpretation of the reaction, keto-thioketo carbenes as active intermediate species and a reversible interconversion among them are suggested on the basis of the fact that there was nonexistence of an equilibrium between the two compounds, such as Ia and IIa, under the reaction condition and a trapping keto-thioketo carbene species as
    2
    -phenylimino-
    5
    -benzylpyridazo [
    4
    ,
    5
    -
    d
    ]-1, 3-dithiol-
    4
    (
    5
    H)-one (IVa) (14% in yield) along with the major products, (Ia) and (IIa), was furnished by warming 1 with phenylisothiocyanate in the presence of triethylamine in dry benzene. On the contrary, participation of a reversible interconversion between Ia and IIa, to a considerable extent, with the concurrent formation of them in the case of benzylation of either Ib or IIb, by warming with benzylchloride in the presence of potassium carbonate in DMF at 80°, might not be neglected, because an attempted approach to an equilibrium between Ia and IIa in a similar reaction condition except the use of benzylchloride realized, whereas non-existence of an equilibrium between Ib and IIb in the similar reaction condition was observed.
  • 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.
  • Hiroyuki HIRAOKA, Naoki MORI, Ritsuo NISHIDA, Yasumasa KUWAHARA
    Bioscience, Biotechnology, and Biochemistry
    2001年 65 巻 12 号 2749-2754
    発行日: 2001年
    公開日: 2002/08/30
    ジャーナル フリー
    A mixture of two monoterpenes was obtained as the opisthonotal gland secretion from unidentified Histiogaster sp. A096 (Acari: Acaridae), and their structures were elucidated to be (
    4
    E
    )-dehydrocitrals[(
    2
    E
    ,
    4
    E
    )- and (
    2
    Z,
    4
    E
    )-3,7-dimethyl-
    2
    ,
    4
    ,
    6
    -octatrienals] by GC/MS, GC/FT-IR, UV and 1H-NMR spectra. Both isomers of (
    4
    E
    )-dehydrocitral prepared by syntheses in
    4
    steps from 3-methyl-
    2
    -butenal with 34.
    2
    % yields (based on the ylide) were separated by column chromatography into the (
    2
    E
    ,
    4
    E
    )- and (
    2
    Z,
    4
    E
    )-3,7-dimethyl-
    2
    ,
    4
    ,
    6
    -octatrienal. Mass spectra together with GC retention times of the purified natural (
    4
    E
    )-dehydrocitrals were identical with those of synthetic (
    2
    E
    ,
    4
    E
    )-3,7-dimethyl-
    2
    ,
    4
    ,
    6
    -octatrienal and (
    2
    Z,
    4
    E
    )-3,7-dimethyl-
    2
    ,
    4
    ,
    6
    -octatrienal. The geometry at the
    2
    -C position of both synthetic (
    4
    E
    )-dehydrocitrals was confirmed by NOESY analyses. This is the first identification of (
    4
    E
    )-dehydrocitrals from the animal kingdom.
  • 伊東 常男, 富井 保雄, 内藤 貴之, 山村 美奈子, 石川 一郎, 川原 徳夫, 水野 義久, 小倉 治夫
    Chemical and Pharmaceutical Bulletin
    1989年 37 巻 8 号 2197-2199
    発行日: 1989/08/25
    公開日: 2008/03/31
    ジャーナル フリー
    5
    -Amino-
    6
    -mercapto-1, 3-dimethyluracil (
    2
    ) was prepared by the treatment of
    5
    ,
    6
    -diamino-1, 3-dimethyluracil (1) with liquid
    H2S
    and pyridine in a sealed steel tube at 60°C for 20 h. Thiazolo[
    5
    ,
    4
    -
    d
    ]pyrimidinediones 3a,
    b
    were obtained from
    2
    by cyclization with
    HCO2H
    and AcOH.Under stringent conditions, however, 1 was converted into the
    5
    ,
    9
    -dihydrodipyrimido[
    4
    ,
    5
    -
    b
    :
    5
    ',
    4
    '-
    e
    ][1,
    4
    ]thiazine derivtive
    4
    a.The structure of
    4
    a was confirmed by spectral (nuclear magnetic resonance and mass spectra) data and by comparison with a sample which was prepared from
    2
    and
    5
    -hydroxy-1, 3-dimethyluracil.Benzylation of
    4
    a gave 1, 3, 7,
    9
    -tetramethyl-
    5
    -benzyl (or p-bromobenzyl)-
    5
    ,
    9
    -dihydrodipyrimido[
    4
    ,
    5
    -
    b
    :
    5
    ',
    4
    '-
    e
    ][1,
    4
    ]thiazine-
    2
    ,
    4
    ,
    6
    ,
    8
    -(1H, 3H, 7H)-tetrone (
    4
    b
    , c) and 1, 3, 7,
    9
    -tetramethyl-
    5
    -benzyl (or p-bromobenzyl)-
    5
    ,
    9
    -dihydropyrrolo[3,
    2
    -
    d
    :
    4
    ,
    5
    -
    d
    ']dipyrimidine-
    2
    ,
    4
    ,
    6
    ,
    8
    -(1H, 3H, 7H)-tetrone (
    6
    a,
    b
    ).
  • 林 慶浩, 川内 進
    Journal of Computer Chemistry, Japan
    2019年 18 巻 5 号 224-226
    発行日: 2019年
    公開日: 2020/03/12
    ジャーナル フリー HTML

    A band gap prediction model of π-conjugated polymers was constructed using aromatic/quinoid, donor/acceptor, and torsion properties to predict quantitatively the band gap of π-conjugated polymers from properties of monomers. Quinoid stabilization energy (QSE), energy difference between HOMO of donor and LUMO of acceptor, torsion angle in homo-dimer of monomers were used as descriptors of aromatic/quinoid, donor/acceptor, and torsion properties. The neural network, which was constructed by

    2
    hidden layers with
    5
    neurons per layer, quantitatively predicts (RMSD = 0.207 eV,
    R2
    = 0.885) the band gap of the π-conjugated polymers from descriptors of monomers.

  • Ying Jiao, Teruhiko Yoshihara, Akitami Ichihara
    Bioscience, Biotechnology, and Biochemistry
    1995年 59 巻 6 号 1032-1035
    発行日: 1995/06/23
    公開日: 2008/02/08
    ジャーナル フリー
    The syntheses of (S)-13-hydroxy-(
    2
    E
    ,
    4
    E
    ,
    8
    E
    )-tetradecatrienoic acid (1) and (
    2
    E
    ,
    4
    E
    ,
    8
    Z-tetradecatrienoic acid (
    2
    ) were carried out by using the Wittig reaction as the key step. The asymmetric center at C-13 and the double bond between C-
    8
    and C-
    9
    for natural compound 1 were reconfirmed as being of (S) configuration and
    E
    , respectively. The relationship between the structure of the unsaturated hydroxy fatty acids and their inhibitory effect on the growth of lettuce was investigated.
  • Naomi Oyama-Okubo, Yuki Mikanagi
    The Horticulture Journal
    2024年 93 巻 2 号 185-193
    発行日: 2024年
    公開日: 2024/04/20
    [早期公開] 公開日: 2024/03/16
    ジャーナル オープンアクセス HTML
    電子付録

    Flowers of the early Polyantha roses, ‘Pâquerette’, ‘Mignonette’ and ‘Anne-Marie de Montravel’, have an unusual odor not found in other roses. Their ancestor is Rosa multiflora, a wild species native to Japan. In particular, ‘Anne-Marie de Montravel’ has a citrus scent with an old wooden closet-like odor. Gas chromatography (GC)-mass spectrometry analysis of the scent components of these roses revealed the presence of several terpenoids, benzenoids, and hydrocarbons, as well as the fatty acid derivatives methyl (

    E
    , Z)-
    2
    ,
    4
    -decadienoate (MDD) and methyl (
    E
    ,
    E
    , Z
    )-
    2
    ,
    4
    ,
    6
    -decatrienoate (EEZ-MDT). GC-olfactometry analysis of scent components of ‘Anne-Marie de Montravel’, identified EEZ-MDT and its isomers as the source of the unpleasant odor. MDD and EEZ-MDT are known as stink bug pheromones, but they were first detected in the scent of plants. We also analyzed the floral scent of several roses related to R. multiflora, namely: two plants of R. multiflora, two Hybrid Multiflora roses (‘Crimson Rambler’ and ‘Rose-Marie Viaud’), eight Polyantha roses (‘Cécile Brunner’, ‘Clothilde Soupert’, ‘Gloire des Polyantha’, ‘Madame Norbert Levavasseur’, ‘Marie Daly’, ‘Marie Pavié’, R. multiflora ‘Nana’, ‘Yvan Misson’), and one Miniature rose (‘Gourmet Popcorn’). EEZ-MDT and/or its isomers were detected not only in ‘Marie Daly’, ‘Marie Pavié’, R. multiflora ‘Nana’, and ‘Gourmet Popcorn’, which had an old wooden closet-like odor, but also in R. multiflora, ‘Rose-Marie Viaud’ and ‘Yvan Misson’, which do not exhibit that unpleasant odor. To produce the unusual odor in the rose fragrance, the EEZ-MDT and its isomers content must be above a certain percentage of the scent components.

  • 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.
  • 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, qnr
    S1 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.

  • 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.
  • 安福 規之, 落合 英俊, 大野 司郎
    地盤工学会論文報告集
    2001年 41 巻 4 号 59-71
    発行日: 2001/08/15
    公開日: 2008/02/29
    ジャーナル フリー
    A simple method based on theoretical and experimental considerations is presented to predict the pile end bearing capacity and load-settlement curve in sands in relation to soil compressibility. The key to the method is in the assumption of a failure mode with a spherical cavity expansion pressure given as a function of the soil compressibility, shear stiffness and friction angle. The practical prediction of pile end-bearing capacity in sandy ground is discussed in terms of a compressibility factor, friction angle and shear stiffness. Further, the pile tip settlement behaviour is also discussed based on an empirical model incorporating the pile end bearing capacity from a cavity expansion analysis with a Kondner type hyperbolic function. The applicability of the proposed method is verified by comparing the predicted results with the results from a series of model pile load tests and a database for in-situ pile load tests in sands.
  • 上田 穣一
    日本化学会誌(化学と工業化学)
    1974年 1974 巻 2 号 273-279
    発行日: 1974/02/10
    公開日: 2011/05/30
    ジャーナル フリー
    メチルキシレノールブルー(MXB)はアルミニウムまたはベリリウムと反応して,赤紫色または赤色の水溶栓錯体を生成する。各呈色溶液はそれぞれ,pH
    2
    2
    2
    5
    ,波長578~583 nmおよびpH
    5
    9
    6
    5
    ,波長513~517nmにおいて一定最大の吸光度を示す。検量線はアルミニウム濃度
    8
    ~35μ
    9
    /25mlの範囲で,またベリリウムの場合は10μ
    9
    !25 mlまで直線性を示し,吸光度0.001に対する感度はアルミニウム濃度20μ
    9
    /25mzにおいて。 oo16μ
    9
    /cm
    2
    であり ベリリウムの場合は,ooo
    8
    lzglcmsである。また,アルミニウム錯体およびベリリウム錯体の組成比をそれぞれpH
    2
    4
    およびpH
    6
    .0で検討した結果,いずれめ場合も1:1と推定された。共存イオンについては,アルミニウムの定量に対し,ガリウム塾インジウム,ビスス(III),スカンジウム,トリウム,フヅ化物イオン,シュウ酸イオンが妨害し,ベリリウムの定量に対し,アルミニウム,トリウム,クロム(III),フッ化物イオンが妨害する。なお,アルミニウムとベリリウムを同時に含む溶液について,おのおのを逐次定量する方法を検討した。
  • 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-43.1mol%W-33.1mol%
    B
    )+WB=
    W2B
    +
    NiW2B2

    P2
    :L (1657K, 48.
    9
    mol%Ni-33.1mol%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, 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".
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