Two new polyacetylene compounds (, , 12)-1-acetoxy-3-isovaleryloxytetradeca-, , 12-trien-, 10-diyn-14-ol (), and (, , 12)-1-acetoxy-3-(-methylbutyryloxy)tetradeca-, , 12-trien-, 10-diyn-14-ol (C) have been isolated along with (, , 12)-1-acetoxy-3-senecioyloxytetradeca-, , 12-trien-, 10-diyn-14-ol (A) from Atractylodes Rhizome (Karabyakujutu). The structures of these compounds were determined on the basis of their spectral data.

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At low levels, enterohemorrhagic Escherichia coli should be selectively isolated by suppressing competing microflora in meat samples. In conventional methods, MacConkey II Agar with C-T Sorbitol (cefixime-tellurite, CT-SMAC) which utilizes the ability of

E

. coli O157 to ferment sorbitol, and media containing -specific chromogenic substrates, are used for detecting

E

. coli O157.
In this study, we compared two types of CHROMagar^TM O157 for the isolation of enterohemorrhagic

E

. coli O157 (improved CHROMagar^TM O157 and conventional CHROMagar^TM O157) with CT-SMAC by using the Miles-Misra method and evaluating the recovers from ground beef and human fecal samples. The results obtained are described below:
1. In the inoculation test with three media by the Miles-Misra method, improved CHROMagar^TM O157 inhibited the growth of all organisms except

E

. coli O157 better than the two other media and allowed easy differentiation from

E

. hermannii, which could not be distinguished on CT-SMAC.
. In the

E

. coli O157 detection test for ground beef artificially inoculated with

E

. coliO157 at 1 cfu/g, the detection rate of improved CHROMagar ^TM O157 was 95%, CTSMAC 75% and conventional CHROMagar^TM O157 40%, respectively.
. In the

E

. coli O157 detection test for

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. coli O157 positive human fecal samples, the detection rate of improved CHROMagar^TM O157 was 54.%, CT-SMAC 50% and conventional CHROMagar^TM O157 .7%, respectively.

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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 (.g., Distance to Epicenter, etc.), Structure (.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), () Distance to Nearest Fault (less than 500 m), (3) Distance to Epicenter (approximately to 14 km, which almost agrees with the location of seismic intensity 7 JMA), () Elevation of Dam Site (higher than 100 m), () Embankment Volume (the greater the volume the more damage was caused), () Direction of Dam Axis (normal or diagonal to the epicenter or to nearest the fault), (7) Plan View of Dam Axis (3 or axes), () 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).

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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.

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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 ～ ,波長578～583 nmおよびpH 9～．,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～35μ9／25mlの範囲で,またベリリウムの場合は10μ9！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20μ9／25mzにおいて。 oo16μ9／cmであり ベリリウムの場合は,ooo 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 ．およびpH ．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。

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The composition of "group saponin" in soybean seed was analyzed by HPLC, and six kinds of "group saponin, " named Ba, , ', Be, and Be according to elution order from HPLC, were detected. Of these saponins, Ba, , ' and Be were identified with soyasaponin V, I, III and II, respectively. and Be were novel saponins possessing soyasapogenol as the aglycone and the same sugar chain as Ba and , respectively. These saponins were very unstable in the isolated state and had a tendency to form Ba and , respectively. From these results, and Be are presumed to be the precursors of Ba and in soybean seed.

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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

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

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The Prins reaction of alloocimene with formaldehyde proceeded smoothly in dichloromethane under reflux in the presence of acetic acid. The reaction products were mainly - (- methy1-1-propeny1)-, -dimethyl-, -dihydro- H-pyran [] and trans- or cis-, -dimethy1-- (-methyl-1, 3-pentadienyl)-1, 3-dioxan, [3] or []. The stereochemistry of the dioxans, [3] and [], was also discussed on the basis of the NMR spectra. The compositions of the products were dependent on the isomer ratio of alloocimene used.

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The syntheses of (S)-13-hydroxy-(, , )-tetradecatrienoic acid (1) and (, , Z-tetradecatrienoic acid () were carried out by using the Wittig reaction as the key step. The asymmetric center at C-13 and the double bond between C- and C-9 for natural compound 1 were reconfirmed as being of (S) configuration and , respectively. The relationship between the structure of the unsaturated hydroxy fatty acids and their inhibitory effect on the growth of lettuce was investigated.

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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 ()-dehydrocitrals[(,)- and (Z,)-3,7-dimethyl-,,-octatrienals] by GC/MS, GC/FT-IR, UV and ¹H-NMR spectra. Both isomers of ()-dehydrocitral prepared by syntheses in steps from 3-methyl--butenal with 34.% yields (based on the ylide) were separated by column chromatography into the (,)- and (Z,)-3,7-dimethyl-,,-octatrienal. Mass spectra together with GC retention times of the purified natural ()-dehydrocitrals were identical with those of synthetic (,)-3,7-dimethyl-,,-octatrienal and (Z,)-3,7-dimethyl-,,-octatrienal. The geometry at the -C position of both synthetic ()-dehydrocitrals was confirmed by NOESY analyses. This is the first identification of ()-dehydrocitrals from the animal kingdom.

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アロオシメン[1]([la]と[lb]の混合物)とアクリル酸メチル[]との付加反応について検討した。
付加体はガスクロマトグラムに本のピークを示した。精留,溶出および分取ガスクロマトグラフィーを利用して各成分を分離し,主として核磁気共鳴スペクトルによって,t-(メチル1プロペニル), t--ジメチル-3-シクロヘギセソr-1カルボン酸メチル[3],オ(メチル1プロペニル), c-ジメチル3シクロヘキセンr-1カルボソ酸メチル[],c-(メチル1プロペニル), t-ジメチル3シクロヘキセンr-1カルボン酸メチル[],および(メチル1プnペニル), c-ジメチル3シクロヘキセンr-1カルボン酸メチル[]として,それぞれその構造を決定した。
アロオシメン(,,,一体[la]:,Z一体[lb]=,35.,3:64,7の混合物)と[]との付加反応においては,原料ジエソの約40%が消費されて,付加物[3],[],[]および()が28,:1 :3. :66.の比で得られた。この場合,未反応油には[lb]のみが回収されて[la]の残存は認められなかった。したがって[la]の方が[lb]よりも反応性が大きいと考えられる。
[lb]と[]の反応の場合にも[3]～[]の付加物を生成し,その生成比は3,7;17,:72,:.であった。この場合,少量生成物の[3]と[]は主生成物の異性化の結果ではなくて,[]の存在下で[lb]が[la]に異性化したあと付加反応を起こして生じたものと考える。

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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- mixing ratio δ, and the 0- mixing ratio μ_k are obtained for 818.7 keV +→2₁⁺ transition to be δ=1.52−

0.22

+0.26, and μ_k≤

6

.1×10−

4

respectively. The

E

2

branching ratio

B

(

E

2

;

2₂

+→0_g⁺):

B

(

E

2

;

2₂

+→2₁⁺):

B

(

E

2

;

2₂

+→0₁⁺) is determined to be 0.0158:1.0:

5

.86.

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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 (

, Z)-,-decadienoate (MDD) and methyl (

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,

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, Z)-,,-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.

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Based on the recommendations of Berezantzev et al., a new semi-empirical equation for settlement ratio of pile foundations in sand has been derived. The settlement ratios obtained using this equation have been compared with the actual measured values. The comparison indicates that the new equation predicts higher than actual settlement values and is therefore conservative. The new equation is therefore modified in the light of empirical evidence and presented in a generalised form which can be used for square, rectangular, and irregular pile groups. The procedures recommended for the use of the equation in preliminary designs are explained.

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