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  • Yukichi Yamaguchi, Jian-zhi Runan(Gen), Teruaki Nagahara
    Journal of the Physical Society of Japan
    1975年 38 巻 4 号 911-916
    発行日: 1975/04/15
    公開日: 2007/06/01
    ジャーナル 認証あり
    The gamma-ray spectrum and the conversion-electron spectrum are measured in the decay of the 116mIn activity. Directional correlations are also measured for 818–1293 and 1097–1293 keV cascades. The M1-
    E
    2 mixing ratio δ, and the
    E
    0
    -
    E
    2 mixing ratio μk are obtained for 818.
    7
    keV
    22
    +→21+ transition to be δ=1.52
    0.22
    +
    0.26
    , and μk
    6
    .1×10−4 respectively. The
    E
    2 branching ratio
    B
    (
    E
    2;
    22
    +→
    0g
    +):
    B
    (
    E
    2;
    22
    +→21+):
    B
    (
    E
    2;
    22
    +→01+) is determined to be
    0
    .0158:1.
    0
    :
    5
    .
    86
    .
  • Joey
    B
    . Tanney, Leonard J. Hutchison
    Mycoscience
    2012年 53 巻 1 号 31-35
    発行日: 2012年
    公開日: 2023/03/31
    ジャーナル オープンアクセス

    The ability of Climacodon septentrionalis to immobilize and kill a mycophagous nematode (Aphelenchoides sp.) in vitro is described for the first time. Two isolates produced droplets (20–45 μm in diameter) that formed at the apices of tall, stalked, and branching secretory cells (700–1,500 μm tall). On 2% modified malt extract agar, nematodes became enveloped in the droplets, which restricted their ability to move and resulted in complete immobilization and death within several hours of contact. The rate of decomposition of the nematodes varied considerably, with most individuals persisting for weeks whereas others were degraded within several days and appeared to be colonized by dense hyphal growth. This study provides the first documentation of a non-agaricoid fungus producing secretory cells that are able to immobilize nematodes.

  • 小田切 孝人, 田代 眞人
    ウイルス
    2013年 63 巻 2 号 233-240
    発行日: 2013/12/25
    公開日: 2014/10/31
    ジャーナル フリー
  • 矢田 公, 草川 實, 庄村 赤裸
    人工臓器
    1984年 13 巻 1 号 37-40
    発行日: 1984/02/15
    公開日: 2011/10/07
    ジャーナル フリー
    1976年から1982年までの間に教室および関連3施設で行った僧帽弁置換術症例351例につき, 機械弁(主に
    B
    -S弁)(以下M弁)と生体弁(主としてC-
    E
    弁)(以下
    B
    弁)グループに2分し, 手術成績および遠隔成績につき検討した。対象351例のうちM弁は92例(27%),
    B
    弁は259例(74%)であった。その成績は, M弁では手術死亡は
    6
    例(
    6
    .
    5
    %), 遠隔死亡は
    8
    例(
    9
    .3%)に対し,
    B
    弁では夫々
    22
    例(
    8
    .
    5
    %), 15例(
    6
    .4%)となり置換弁による差はみられなかった。また死亡原因からは両者間に有意差をみなかったが, ただ感染症の頻度がM弁の1例(1.2%)に比し
    B
    弁は
    9
    例(3.
    8
    %)と多かった。生存曲線をみるとM弁で平均2.
    7
    年,
    B
    弁で2.
    9
    年, 累積追跡期間は夫々226と672 patient-yearであるが3年生存率では
    85
    %,
    85
    %,
    6
    年生存率でも
    85
    %,
    85
    %と全く同じであった。
    6
    年の遠隔追跡ではその他血行動態も含め差はなかったが,
    B
    弁の弁機能不全については更に長期の観察が必要であると考えられた。
  • M. L. GHOSH
    Journal of Physics of the Earth
    1972年 20 巻 2 号 165-186
    発行日: 1972年
    公開日: 2009/04/30
    ジャーナル フリー
    The possibility of attenuation of microseismic waves due to the presence of an upward folding of the ocean bottom into the liquid is discussed in this paper. The upward folding of the ocean bottom has been idealized by means of an irregularity in the form of a rectangle intruding into the liquid and the evaluation of the displacement component at any point of the solid medium has been carried out in two stages. First, the change in the incident mode of the surface wave due to the presence of the rectangular irregularity has been determined, and second, the subsequent change of the resulting displacement components due to the termination of the liquid layer and the step change in elevation of the solid medium at the continental margin has been discovered. Finally, numerical calculation has been made to determine the attenuation of the microseismic waves of different periods due to the presence of the rectangular irregularity at the ocean bottom.
  • 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
    .
    0
    mol%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.
    0
    mol%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-40.4mol%Mo-17.3mol%
    B
    )+Mo=
    Mo2B
    +
    NiMo2B2

    P3:L (1812K, 53.
    5
    mol%Ni-33.
    7
    mol%Mo-12.
    8
    mol%
    B
    )+Mo=NiMo+
    NiMo2B2

    E1
    :L (1622K, 51.
    0
    mol%Ni-31.
    6
    mol%W-17.4mol%
    B
    )=(Ni)+W+
    NiW2B2

    E2
    :L (1260K, 71.
    0
    mol%Ni-
    7
    .
    0
    mol%W-
    22
    .
    0
    mol%
    B
    )=(Ni)+
    Ni3B
    +
    NiW2B2

    E3
    :L (1291K, 65.4mol%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.
    0
    mol%
    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.
  • 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 (4a and 4
    b
    ) were synthesized. Compounds 4a and 4
    b
    were desulfurized to give a pair of isomeric 2-methylbenzoylcyclohexanes (10a and 10
    b
    ). Deuterated 4a and 4
    b
    (11a and 11
    b
    ) were prepared starting from butadiene-
    d6
    (12). The stereochemical features of 3a (trans), 3
    b
    (cis), 4a (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.
  • Yasuyuki Gono, Manabu Fujioka, Tamotsu Toriyama
    Journal of the Physical Society of Japan
    1970年 29 巻 2 号 255-258
    発行日: 1970/08/05
    公開日: 2007/06/01
    ジャーナル 認証あり
    The gamma-ray spectrum and the conversion-electron spectrum are measured in the decay of the Tb152 activity. The L-subshell electron lines of the 586.
    7
    keV
    22
    +→21+ transition are separated by the ion-free beta-ray spectrometer. The M1-
    E
    2 mixing ratio, δ2, and the dimensionless ratio X of
    E
    0
    -
    E
    2 mixing of the 586.
    7
    keV transition are obtained to be δ2
    0
    .16 and
    0
    .034≤X
    0
    .038, respectively. The
    E
    2 branching ratio
    B
    (
    E
    2;
    22
    +→
    0g
    +):
    B
    (
    E
    2;
    22
    +→21+):
    B
    (
    E
    2;
    22
    +→01+) is determined to be
    0
    .023 : 1.
    0
    :
    5
    .
    6
    .
  • 増大する資源
    E
    . F. Boswell
    紙パ技協誌
    1998年 52 巻 7 号 885-889
    発行日: 1998/07/01
    公開日: 2009/11/19
    ジャーナル フリー
    The world is in the midst of a huge fundamental shift in fibre supply, demand balances, and policy changes. Governments around the world are introducing policy changes which influence the supply demand balance as the politicians' thoughts are uttered. Government agencies and their bureaucrats are imposing changes on industry even before the legislation is passed by the government in question.
    This ad hoc change process will continue for a time to come until the countries in question show a tough-mindedness with regard to their land use policies. Policies affecting forest areas such as protection areas, Native land claims, the protection of biodiversity and a true goal of sustainable development ; which addresses the combined issues of cultural, environmental, social and economic matters.
    Eventually all of these difficult issues will reach essential closure. Then there will be great new opportunities for investment to meet the growing demand for forest products ; leading to a strengthening competitive position in the more traditional producing areas such as Canada.
  • その所属腱索および乳頭筋について
    島田 博
    日本医科大学雑誌
    1981年 48 巻 6 号 779-789
    発行日: 1981/12/15
    公開日: 2010/10/14
    ジャーナル フリー
    Although there have been numerous articles concerning the anatomy of the atrioventricular valve in man, only a few publications have recorded the relationship between the chordae tendineae and the papillary muscles. The purpose of this paper is to study the relationship among the shape and size of the atrioventricular valve, the chordae tendineae and the papillary muscles. 50 subjects, as listed in Table 1, were analyzed by the Taniya-Hashimoto Method.
    The results obtained were as follows:
    1) The right atrioventricular valve was classified into two types: 33 cases (66%) of three irregularly shaped cusps, i.
    e
    . type I, and 17 cases (34%) of four or five cusps, i.
    e
    . type II.
    2) The average circumference of the right atrioventricular orifice (ostium atrioventriculare dextrum) was 11.96cm (
    9
    .63.15.06cm) in type I and 12.19cm (
    9
    .52.15.
    22
    cm) in type H. There existed no significant difference in the circumference of the atrioventricular orifice between type I and II.
    3) The average length of the cusp-fundus (the length of the fixed margin of the cusp) was as follows:
    type I: anterior cusp…………4.13cm (2.03-
    6
    .96cm)
    posterior cusp…………3.62cm (1.21-
    5
    .44cm)
    septalcusp……………4.21cm (3.11-
    6
    .08cm)
    type II: anterior cusp…………4.10cm (2.68-
    5
    .42cm)
    posterior cusp…………3.67cm (
    0
    .
    94
    -
    5
    .70cm)
    septal cusp……………4.43cm (2.96-
    6
    .53cm)
    4) The average width of the cusp (the maximum distance between the apex and the fundus of the cusp) was as follows:
    type I: anterior cusp…………1.
    86
    cm (1.26-2.29cm)
    posterior cusp…………1.62cm (
    0
    .62-2.
    94
    cm)
    septal cusp……………1.76cm (1.15-2.72 cm)
    type II: anterior cusp…………1.92cm (1.40-2.34cm)
    posterior cusp…………1.72cm (
    0
    .
    94
    -2.42cm)
    septal cusp……………1.84cm (1.14-2.53cm)
    The length or width of the cusp in type I was similar to that in type II.
    5
    ) The papillary muscles consisted of five groups, which were named the anterior, postlateral, postmedial, postseptal and septal muscles. The average number of the papillary muscles per right ventricle was
    5
    .
    7
    (2.
    0
    .
    9
    .
    0
    ). The chordae tendineae from the anterior papillarymuscles were attached to the anterior and posterior cusps and those from the postlateral and postmedial muscles were attached to the posterior and septal cusps. The chordae tendineae from the postseptal muscles were linked only to the septal cusp and those from the septal muscles were connected to the septal and anterior cusps.
    6
    ) The average number of the stems of the chordae tendineae from the papillary muscles were as follows:
    From the anterior papillary muscles………
    7
    .2 (2.
    0
    -14.
    0
    )
    the postlateral papillary muscles……3.
    5
    (1.
    0
    -
    8
    .
    0
    )
    the postmedial papillary muscles……4.
    0
    (1.
    0
    -
    8
    .
    0
    ) the postseptal papillary muscles……4.
    5
    (1.
    0
    -13.
    0
    ) the septal papillary muscles………
    5
    .
    7
    (2.
    0
    -12.
    0
    )
    The average n umber of the stems of the chordae tendineae per right ventricle was 24.4 (16.
    0
    -35.
    0
    ).
    7
    ) The tip of the chordae tendineae are attached to the fixed margin of the valve cusp, i.
    e
    . type A, to the ventricular surface, i.
    e
    . type
    B
    and to the free margin, i.
    e
    . type C. The average number of them were 23.4 (14.
    0
    -32.
    0
    ) in type A, 19.2 (4.
    0
    -37.
    0
    ) in type
    B
    and 68.1 (31.
    0
    -105.
    0
    ) in type C. The average number of the apexes of the chordae tendineae per right ventricle was 110.
    7
    (53.
    0
    -166.
    0
    ).
    8
    ) The average number of the chordae tendineae for the anterior cusp was 34.
    9
    (12.
    0
    -64.
    0
    ), for the posterior cusp 30.
    5
    (
    5
    .
    0
    -65.
    0
    ) and for the septal cusp 45.3 (23.
    0
    -68.
    0
    ).
  • 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.

  • 黒川 美貴雄, 糸川 彰, 松本 純一, 福本 吉久, 月原 冨武
    Chemical and Pharmaceutical Bulletin
    1992年 40 巻 9 号 2270-2274
    発行日: 1992/09/25
    公開日: 2008/03/31
    ジャーナル フリー
    11-Amino-
    6
    ,
    6
    a,
    7
    ,
    8
    ,
    9
    , 10, 10a, 11-octahydrodibebenzo[
    b
    ,
    e
    ]thiepines (
    6
    a-d) and -oxepines (
    7
    a-d) were synthesized by the Leuckart reaction of
    6
    ,
    6
    a,
    7
    ,
    8
    ,
    9
    , 10, 10a, 11-octahydro-11-oxodibenzo[
    b
    ,
    e
    ]thiepines (1a,
    b
    )and -oxepines (2a,
    b
    ) followed by hydrolysis of the reaction products 4a-d and
    5
    a-d, respectively. The four diastereomers, cis(
    6
    a-H, 10a-H)-cis(10a-H, 11-H)
    6
    a and
    7
    a, cis(
    6
    a-H, 10a-H)-trans(10a-H, 11-H)
    6
    b
    and
    7
    b
    , trans(
    6
    a-H, 10a-H)-trans(10a-H, 11a-H)
    6
    c and
    7
    c, and trans(
    6
    a-H, 10a-H)-cis(10a-H, 11-H)
    6
    d and
    7
    d, were isolated and their configurations and conformations were elucidated by chemical methods together with 1H-nuclear magnetic resonance spectroscopic and X-ray crystallographic analyses.
  • ―各成分の組織化学的観察と定量―
    長谷川 元治, 荒井 親雄, 斉藤 光代, 竹内 光吉, 安部 信行, 遠藤 みどり, 高山 吉隆, 駒沢 勉, 森下 健
    動脈硬化
    1984年 12 巻 3 号 703-711
    発行日: 1984/08/01
    公開日: 2011/09/21
    ジャーナル フリー
    1) Nine male rabbits 38 months old were concurrently loaded with 3 different treatments i.
    e
    ., N2 gas inhalation, norepinephrine in injection and cholesterol oral administration, and left coronary anterior descending branch (LCA
    5
    ) was observed histochemically and determined for smooth muscle cell, elastin, collagen, acid mucopolysaccharides and glycoproteien in comparison with
    8
    healthy normal rabbits of the same age.
    2) The histology of the indurative group presented obivious histo-lesional findings such as atrophy and necrosis of the smooth muscle cells (SMC), swelling and stratified rupture of the inner elastic membrane, loses in content of medial elastin (EL) and collagen (CL) and their transfer from the tunica externa, and compensatory increases in content of acid mucopolysaccharides (AMPS) and glycoprotein (GP).
    3) The results of the determination made of these
    5
    constituents revealed that the healthy normal group and the indurative group showed 65.4±
    7
    .
    9
    and 46.
    7
    ±
    7
    .
    5
    (p<
    0
    .001) of SMC,
    9
    .
    6
    ±
    0
    .88 and 12.2±2.78 (p<
    0
    .05) of EL 25.
    7
    ±4.02 and 35.
    6
    ±3.
    86
    (p<
    0
    .001) of CL, 14.4±1.
    7
    and 20.2±2.
    85
    (p<
    0
    .001) of AMPS and
    22
    .
    8
    ±
    5
    .
    9
    and 31.
    6
    ±
    7
    .
    5
    %
    E
    of GP, respectively, the indurative group showed significantly less content of SMC and significantly more contents of EL, CL, AMPS and GP than the healthy normal group.
  • Grover Loening
    日本航空学会誌
    1963年 11 巻 119 号 373-380
    発行日: 1963年
    公開日: 2009/05/25
    ジャーナル フリー
  • S. Datta, J. Sil, M. K. Banerjee
    ISIJ International
    1999年 39 巻 10 号 986-990
    発行日: 1999/10/15
    公開日: 2007/05/31
    ジャーナル フリー
    The effect of composition and controlled thermomechanical process parameters on the mechanical properties of HSLA steels is modelled using the Widrow-Hoff's concept of training a neural net with feed-forward topology by applying Rumelhart's back propagation type algorithm for supervised learning, using a Petri like net structure. The data used are from laboratory experiments as well as from the published literature. The results from the neural network are found to be consistent and in good agreement with the experimented results.
  • George W. Lee
    燃料協会誌
    1973年 52 巻 3 号 171-177
    発行日: 1973/03/20
    公開日: 2010/06/28
    ジャーナル フリー
  • 小林 優, 神田 扶由子, S. M. D. Kumar, Ch. V. Lakshmana Rao, D. Srinivasa Rao, D. Venkata Rao, C. Bheemasankara Rao
    天然有機化合物討論会講演要旨集
    1990年 32 巻 20
    発行日: 1990/09/25
    公開日: 2017/08/18
    会議録・要旨集 フリー
    Melithasterols A-D (1-4), isolated from a gorgoinan coral Melithaea ocracea of Okinawa, were shown to be cholestane-, 24-methyl-
    22
    -dehydrocholestane-,
    22
    -dehydrocholestane-, and 24-methylenecholestane-derivatives. respectively, having a common 3β,
    7
    α -dihydroxy-
    5
    α,
    6
    α-epoxy-Δ^
    8
    steroid nucleus. This was confirmed by direct comparison with the authentic sample prepared by lead tetra-acetate oxydation of cholest-
    6
    -ene- 3β,
    5
    α,
    8
    α-triol 3-monoacetate. Twelve new polyhydroxysterols were isolated from an Alcyonium sp. (
    7
    ,
    8
    ,
    9
    ), and Sclerophytum sp. (14,16,19
    b
    ,20,21,
    22
    a,23,26,28) soft corals collected off the coasts of the Andaman and Nicobar Islands in the Indian Ocean. All the Sclerophytum sp. soft corals contained 17a or its 25-deacetyl derivative. Compounds
    7
    to
    9
    were identified as 24-methylenecholest-
    5
    -ene- 3β, 16β-diol-3-
    0
    -α-L fucoside (
    7
    ) and its
    7
    β-(
    8
    ) and
    7
    α-hydroxy (
    9
    ) derivatives. Compound 14 was shown to be 24S-24-methylcholest-
    5
    -ene-3β,25ξ,26-triol and was correlated to the known compound 15 by
    5
    α,
    6
    β-glycolation. Compound 16 was shown to be
    5
    β,
    6
    α-isomer of 17
    b
    , correlating to 17
    b
    by PCC oxidation followed by dehydration. Compound 19
    b
    was identified with 25-deacetyl derivative of the known compound lobosterol (19a) by hydrolysis of authentic lobosterol. Compounds 20 and 21 were shown to be
    7
    -dehydro-(20) and
    22
    E
    -dehydro-(21) derivative of 17a and 17
    b
    , respectively, by comparisons of their spectral data with reference compounds. Compounds
    22
    a and 23 were 24S-methylcholestane-3β,
    5
    α 25-triol-
    6
    -one 25-monoacetate (
    22
    a) and its 25-deacetoxyl derivative (23). Partial PCC oxidation of 17a afforded
    22
    a. Compounds 26 (andamansterol) and 28 (nicobarsterol) were shown to be gorgost-
    5
    -ene-3β,
    9
    α. 11α, 21-tetrol and novel secosteroid, 11,21-cyclo-
    B
    -homo-11-oxa-
    9
    , 11-secoergostane-3β,
    6
    α, 12ξ-triol-
    9
    -one, respectively, by spectral analyses (H-HCOSY, HMQC, HMBC).
  • 高津戸 秀, 池川 信夫
    Chemical and Pharmaceutical Bulletin
    1984年 32 巻 5 号 2001-2004
    発行日: 1984/05/25
    公開日: 2008/03/31
    ジャーナル フリー
    Brassinolide analogues, (
    22
    R, 23R, 24R)-2α, 3α,
    22
    , 23-tetrahydroxy-
    B
    -homo-
    7
    -oxa-
    -ergostan-
    6
    -one (24-epibrassinolide) (10) and (
    22
    S, 23S, 24R)-2α, 3α,
    22
    , 23-tetrahydroxy-
    B
    -homo-
    7
    -oxa-
    -ergostan-
    6
    -one (
    9
    ), were synthesized from brassicasterol (3a) in five steps and with ca. 20% overall yield. The key steps are the direct formation of (
    22
    E
    , 24R)-3α,
    5
    -cyclo-
    -ergost-
    22
    -en-
    6
    -one (4) from brassicasterol mesylate (3
    b
    ), the acid-catalyzed rearrangement of 4 to (
    22
    E
    , 24R)-
    -ergosta-2,
    22
    -dien-
    6
    -one (
    6
    ), and the Baeyer-Villiger oxidation of the tetrahydroxy
    -ergostan-
    6
    -ones
    7
    and
    8
    .
  • 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
  • B
    .C. CHATTOPADHYAY, P.J. PISE
    土質工学会論文報告集
    1986年 26 巻 4 号 16-22
    発行日: 1986/12/15
    公開日: 2008/02/29
    ジャーナル フリー
    Horizontal plate anchors are widely used in civil engineering constructions to resist vertical pulling loads. The available theoretical model suggested by Vesic to estimate the breakout resistance of plate anchors is in significant error, particularly for dense sandy soils. A theoretical model assuming a curved surface of failure through the surrounding soil, to evaluate the ultimate breakout resistance of horizontal plate anchors, has been proposed. It successfully brings out the concept of characteristics relative depth beyond which the breakout factor reaches a constant final value. It is capable of predicting breakout factors for wide range of values of angle of shearing resistance of sand.
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