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.
2. 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 %, CTSMAC 75% and conventional CHROMagar^TM O157 40%, respectively.
. In the

E

. coli O157 detection test for

E

. coli O157 positive human fecal samples, the detection rate of improved CHROMagar^TM O157 was 54.5%, CT-SMAC 50% and conventional CHROMagar^TM O157 .%, respectively.

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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

. coli isolates were detected in (.2%) of the swab samples. Sequencing analysis results showed occurrence of various β-lactamase genes: bla_CTX-M-15 (62), blaTEM-

1b

(42), bla_CMY-2 (

22

), bla_CTX-M-3 (16), bla_CTX-M-1 (15), bla_OXA-1 (

9

) and bla_SHV-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.

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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 M1-2 mixing ratio δ, and the 0-2 mixing ratio μ_k are obtained for 818. 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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Levels in

22Ne

,

22Na

and ²⁷Al were excited via (α, n) or (α, p) reactions. Using the recoil-distance method, mean lives (in ps) have been obtained for excited states (keV) in the residual nuclei:

22Ne

(1274)=

4

.

95

±0.71,

22Na

(891)=13.

9

±0.8,

22Na

(1528)=5.

93

±0.65,

22Na

(2211)=19.

7

±1.8, ²⁷Al(844)=42.3±5.5 and ²⁷Al(1014)=2.44±0.35.

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One method currently being considered for the disposal of high level radio-active waste is burial in the seabed. When a hot object is buried in soil, the temperature of the soil adjacent to the object is raised and there is transient heat flow away from the object. The rise in the temperature of the soil causes excess pore pressures to be generated and transient pore water diffusion also takes place. A finite element formulation of the coupled heat flow and consolidation problem is presented. The computer implementation of this formulation is found to compare favourably with analytical solutions based on the same physical principles.

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Chemical properties of ergosta-, 6, 8(14), -tetraen-3-one (1) were investigated. Though 1 is rather stable to acids or bases, it reacts easily with two moleculres of oxygen on irradiation with UV light to give 6α, -epidioxy-14α-hydroperoxyergosta-, , -trien-3-one (2), which is transformed successively to 6α, ;8α, -diepoxy-14α-hydroperoxyergosta-, -dien-3-one (3) and 14α-hydroperoxy--hydroxyergosta-, , -triene-3, 6-dione () under these reaction conditions.

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In the first part of the present work the interaction of glycophorin with dimyristoylphosphatidylcholine (DMPC) is studied by freeze fracture electron microscopy, densitometry, calorimetry, and 90° static light scattering. An exothermic lipid/protein interaction energy of W_P=190 kJ•mol^-1 was found by application of the well known Van Laar relation for the displacement of the freezing point and the Gibbs-Duhem relationship. Secondly, the effects of Ca²⁺ on the lipid/protein interaction were studied. Following Ca²⁺ addition a remarkable decoupling of the interaction of the glycophorin head group with the bilayer surface was revealed by densitometry and gold-labeling electron microscopy. It is estimated that about 80% of lipid once disturbed by the adsorption of glycophorin head groups is decoupled after addition of Ca²⁺. Thirdly, the selective interaction of glycophorin with binary lipid mixtures was studied, including the mixtures of DMPC with dimyristoylphosphatidylserine (DMPS) and dilauroylphosphatidylcholine (DLPC), and the mixture of dipalmitoylphosphatidylcholine (DPPC) with DLPC.

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The half-life and the multipolarity for the 213 keV transition in

93Sr

have been determined to be (

4

.6±0.3) ns and

E

2 (≤15%Ml) from β-γ delayed and x-γ coincidences, respectively. The half-life for the 204 keV transition in

95Sr

was also determined to be (20.

9

±0.5) ns. The reduced transition probabilities are deduced as

B

(

E

2)=(261₋₄₃⁺¹⁷)

e²fm⁴

for the 213 keV transition and

B

(

E

2)=(71±2)

e²fm⁴

for the 204 keV transition. These

B

(

E

2) values are comparable to the Weisskopf estimates and to those for the similar transitions in the neighbouring nuclei.

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Brassinolide analogues, (R, 23R, 24R)-2α, 3α, , 23-tetrahydroxy--homo--oxa-5α-ergostan-6-one (24-epibrassinolide) (10) and (S, 23S, 24R)-2α, 3α, , 23-tetrahydroxy--homo--oxa-5α-ergostan-6-one (), were synthesized from brassicasterol (3a) in five steps and with ca. 20% overall yield. The key steps are the direct formation of (, 24R)-3α, 5-cyclo-5α-ergost--en-6-one () from brassicasterol mesylate (3), the acid-catalyzed rearrangement of to (, 24R)-5α-ergosta-2, -dien-6-one (6), and the Baeyer-Villiger oxidation of the tetrahydroxy 5α-ergostan-6-ones and 8.

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The phase diagrams of the Ni-Mo- and Ni-W- ternary systems in the region of less than 50mol% 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:
:L (1365K, 71.5mol%Ni-6.0mol%Mo-.5mol%)=(Ni)++
:L (1355K, 62.5mol%Ni-2.5mol%Mo-30.5mol%)=++
:L (1445K, 42.0mol%Ni-30.6mol%Mo-10.3mol%)=(Ni)+NiMo+
P₁:L (1812K, 34.mol%Ni-42.3mol%Mo-.8mol%)+MoB=+
P₂:L (1633K, 42.3mol%Ni-40.mol%Mo-17.3mol%)+Mo=+
P₃:L (1812K, 53.5mol%Ni-33.mol%Mo-12.8mol%)+Mo=NiMo+
:L (1622K, 51.0mol%Ni-31.6mol%W-17.mol%)=(Ni)+W+
:L (1260K, 71.0mol%Ni-.0mol%W-.0mol%)=(Ni)++
:L (1291K, 65.mol%Ni-.8mol%W-29.8mol%)=++
P₁:L (2115K, 23.8mol%Ni-43.1mol%W-33.1mol%)+WB=+
P₂:L (1657K, 48.mol%Ni-33.1mol%W-18.0mol%)+=W+
The calculated phase diagrams are expected to be useful for the development of new Ni-based heat-, corrosion- or wear-resistance alloys.

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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. keV +→2₁⁺ transition are separated by the ion-free beta-ray spectrometer. The M1-2 mixing ratio, δ², and the dimensionless ratio X of 0-2 mixing of the 586. keV transition are obtained to be δ²≤0.16 and 0.034≤X≤0.038, respectively. The 2 branching ratio (2; +→0_g⁺): (2; +→2₁⁺): (2; +→0₁⁺) is determined to be 0.023 : 1.0 : 5.6.

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We screened the differentiation-inducing activities of 39 mushroom extracts from Akita prefecture, Japan, on the mouse osteoblastic cell line, MC3T3-1. Sixteen phosphate buffered saline (PBS), 8 boiled PBS, 14 ethanol and 12 methanol extracts induced alkaline phosphatase (ALP) activities, an indicator of MC3T3-1 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 (,24R)-ergosta-,-diene-3β,5α,6β-triol (1). 1 induced ALP activities of MC3T3-1 cells and promoted cell proliferation. To investigate the relationships between the chemical structure and differentiation-inducing activity of the compound, ALP-inducing activities of MC3T3-1 cells by 1, ergosterol (2), ergocalciferol (3), cholesta-3β,5α,6β-triol (), -dehydrocholesterol (5) and cholecalciferol (6) were tested. The enzyme activities of MC3T3-1 cells were increased 3.0-fold by 10 μM 1 and 2.-fold by 10 μM . However, 2, 3, 5 and 6 did not induce MC3T3-1 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 played an important role in their differentiation-inducing activities on MC3T3-1 cells. Furthermore, 1 suppressed induction of MC3T3-1 cell apoptosis by serum starvation.

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Vibrio parahaemolyticus is a prevalent food-borne pathogen in Taiwan, Japan and other Asian countries. This work presents a novel ribotyping method for the molecular epidemiological examination of this pathogen. Genomic DNA was fragmented by HindIII digestion and hybridized with cDNA probe for Escherichia coli 16S and 23S RNA genes. A total of 121 isolates obtained from outbreaks during 1992 and 1994 in Taiwan were characterized by this ribotyping method. Four to seventeen restricted fragments were visualized in these isolates. After hierarchical cluster analysis, these isolates were grouped into thirty different ribotypes. In addition, A3, A, 3 and F1 were the major ribotypes, consisting of .3, 13.2, .1, and 8.3% of the isolates, respectively. A, , F, G and were the major groups, consisting of 46.2, 14.0, .1, 6., and 6.% of the isolates, respectively. The discriminatory ability of this ribotyping method, as determined by Simpson's index of diversity, was 0., which closely resembled that of a previously reported pulsed-field gel electrophoresis method.

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Fatty acid compositions of neutral lipids (NL) and polar lipids (PL) have been analyzed for a unique sample of Ophiuroidea (brittle star) Ophiura sarsi containing novel nonmethylene-interruped (NMI) fatty acids, ,-icosadienoic (20:2), ,,17Z-icosatrienoic (20:3), ,,19Z-docosatrienoic (:3), and ,,,19Z-docosatetraenoic (:) acids. All of the NMI fatty acids were concentrated in NL (mainly triacylglycerols) rather than in PL (mainly phosphatidylcholines and phosphatidylethanolamines). On the other hand, 6,,12,15,18,21-tetracosahexaenoic acid (24:6n-3) usually observed in Ophiuroidea lipids was found in PL at higher concentration than in NL. Biological property and origin of the novel NMI fatty acids appear to be different from those of 24:6n-3.

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目的 :

シュアパス^TM法の HSIL で認められる, 3-D 状の hyperchromatic crowded cell groups (HCG) の出現頻度と細胞像, 生検組織診との一致率について検討した.

方法 : サーベックスブラシ^®を用いて採取し, ブラシ先端を専用バイアルに回収し,

シュアパス^TM法の手順に従い標本を作製した. 本研究は慈恵医大倫理委員会より承認を受けた [-189 (6366)].

成績 :

シュアパス^TM法で HSIL と評価した 250 例の平均年齢は 38.0 歳であった. 生検は 250 例中 206 例 (82.%) で実施され, 良性 (10 例), CIN1 (43 例), CIN2 (99 例), CIN3 (47 例) および微小浸潤扁平上皮癌 ( 例), であった. HSIL での HCG の出現頻度は 69.3%であった. 生検との一致率は, 組織診が CIN2 以上で 74.3%, CIN1 以上で .1%であった.

結論 :

シュアパス^TM法の HSIL では, 核分裂像や apoptotic body を含む 3-D 状の HCG が高頻度であった. その HCG は HSIL 発見の手掛かりとして重要な細胞所見であると考えられた.

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Agaricus blazei is an important fungus for producing bioactive compounds. There are some reports of polysaccharides and steroid derivatives from the fruiting bodies of A. blazei. However, the chemical examination of the secondary metabolites of the cultured mycelia of this species has not been reported. Eight compounds, an unprecedented skeleton have been isolated from the cultured mycelia of A. blazei. The structures of the novel compounds each named blazeispirols A (1), (2), C (3), D (), (5) X(6), Y () and Z (8) were confirmed by extensive 1D and 2D NMR spectral data and X-ray analysis. Blazeispirols A (1), (2), C (3), D () and (5) were des-A-ergostane type compounds having spiroacetal structure as a side chain. Blazeispirols X (6) and Y () were determined to be (20S, S, 23R, 24S)-1 (10→6) abeo-14β, :, 25-diepoxyergosta-5,,,11-tetraene-3α,23-diol and (20S, S, 23R, 24S)-14β,:,25-diepoxy-,23-dihydroxyergosta-,,11-triene-3,6-dione by comparison of extensive 1D and 2D NMR spectral data with that of blazeispirol A. The biosynthesis of blazeispirol A was investigated by feeding ^<13>C-labeled acetates and methionine to the growing cultures of A. blazei. The labeling patterns of 1 derived from singly and doubly ^<13>C-labeled acetates were consistent with that of ergosterol reported previously except for the A-ring and then ^<14>C-labeled ergosterol was incorporated into blazeispirol A. Taking the structures of blazeispirols Z and D into consideration, it can be assumed that blazeispirol A is biosynthesized from ergosterol by the cleavage of C-, C-5 and C-1, C-10 bonds on retro aldol condensation and Michael reaction via such as intermediate A as shown in Fig. . A large number of ergostane-type steroids have been isolated from many fungi. However, blazeispirol A is the first example of a naturally occurring des-A-ergostane-type steroid including a spiroacetal structure moiety as a side chain.

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