-
Tomohiro Hayashi, Masao Sakurai, Katsutoshi Nitta
1996 Volume 25 Issue 9 Pages
723-724
Published: 1996
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The changes in the apparent specific volume and apparent specific adiabatic compressibility associated with thermal and chemical denaturations were studied for hen egg white lysozyme solution. No transition was found in the temperature dependence of the apparent quantities, whereas the addition of a certain amount of guanidine hydrochloride seems to decrease slightly the volume and compressibility.
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Toshinori Sato, Nobuaki Shirakawa, Hirotaka Nishi, Yoshio Okahata
1996 Volume 25 Issue 9 Pages
725-726
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DNA complexes with naturally occurring polysaccharides, polygalactosamine or chitosan, were formed in water. Thermal profiles, CD spectrum, zeta-potentials, and cell uptake were investigated. The DNA/polygalactosamine complex showed higher cell uptake than DNA/chitosan complex did.
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Yasutaka Kataoka, Osamu Matsumoto, Kazuhide Tani
1996 Volume 25 Issue 9 Pages
727-728
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A silver(I) salt catalyzed the stereoselective
trans addition of alcohol to dimethyl acetylenedicarboxylate smoothly under mild conditions to afford dimethyl methoxyfumarate in a quantitative yield.
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Naoki Toshima, Ping Lu
1996 Volume 25 Issue 9 Pages
729-730
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Pd/Ni bimetallic clusters have been successfully prepared for the first time by a polyol reduction method, in which a mixed solution of Pd and Ni salts were reduced at high temperature by ethylene glycol. The bimetallic clusters are proved by TEM, XRD and preliminary EXAFS analysis to have an alloy structure. The bimetallic clusters show much higher catalytic activity for hydrogenation of nitrobenzene to aniline under mild conditions than the monometallic Pd or Ni clusters.
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Naotoshi Nakashima, Yujiro Miyata, Masato Tominaga
1996 Volume 25 Issue 9 Pages
731-732
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Assembled monolayers of α-methoxy-ω-mercapto-poly(ethylene glycol) on gold were found to provide unique microenvironments for the electrochemistry of small molecules and a heme protein and to form a two-dimensional supramolecular complex with α-CD on the metal electrode surfaces.
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Toshiyuki Kida, Daisuke Furue, Araki Masuyama, Yohji Nakatsuji, Isao I ...
1996 Volume 25 Issue 9 Pages
733-734
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D-Ribose was selectively transported from a mixture of
D-ribose,
D-glucose, and
D-fructose through a bulk liquid membrane including reversed micelles. Among amphiphiles examined in this study, a gluconamide-type amphiphile was found to form the best carrier from the point of both the selectivity and the velocity.
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Masao Shiozaki, Masami Arai, Wallace M. Macindoe, Takashi Mochizuki, S ...
1996 Volume 25 Issue 9 Pages
735-736
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Compound
10 was synthesized from β-
D-glucose pentaacetate in a stereocontrolled manner. It unexpectedly showed LPS-agonistic activity much stronger than that of GLA-60 toward human monoblastic U937 cells in the TNFα production.
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Kiyoaki D. Sugi, Takushi Nagata, Tohru Yamada, Teruaki Mukaiyama
1996 Volume 25 Issue 9 Pages
737-738
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The enantioselective borohydride reduction of ketones catalyzed by optically active (β-oxoaldiminato) cobalt(II) complexes was remarkably improved by using the borohydride which was modified with furfuryl alcohol dervatives and ethanol. In the presence of 1 mol% of the above complex catalysts, asymmetric reduction of aromatic ketones proceeded smoothly to give the corresponding optically active alcohols in quantitative yields within 6–12 h with high enantiomeric excesses (90–97% ee).
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Jun Izumi, Teruaki Mukaiyama
1996 Volume 25 Issue 9 Pages
739-740
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Various aromatic ketones are prepared in good to high yields with carboxylic anhydrides using combined catalyst system of TiCl(OTf)
3 and TfOH.
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Toshihiro Hashimoto, Shigeru Kanayama, Yukiko Kan, Motoo Tori, Yoshino ...
1996 Volume 25 Issue 9 Pages
741-742
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Two new type of macrocyclic bis(bibenzyls) named isoplagiochins C (
1) and D (
2) have been isolated from the liverwort
Plagiochila fruticosa, and their structures established by a combination of two dimension NMR spectra and chemical degradation.
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Atsushi Ishihara, Masato Yamaguchi, Hideki Godo, Weihua Qian, Masazumi ...
1996 Volume 25 Issue 9 Pages
743-744
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In hydrodesulfurization of
35S-labeled dibenzothiophene over alumina-supported ruthenium sulfide-cesium catalysts, the role of cesium was elucidated by tracing the behavior of
35S on the working ruthenium catalysts; the addition of cesium increased the catalytic activity by strengthening Ru-S bonds of ruthenium sulfide. It is suggested that there is an optimum Ru-S bond strength to obtain the high catalytic activity.
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Hiroaki Kido, Haruko Nagino, Tasuku Ito
1996 Volume 25 Issue 9 Pages
745-746
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The synthetic method for the stepwise Ru
3 unit elongation of pyrazine-bridged linear oligomer of trinuclear ruthenium complex with the Ru
3(μ
3-O)(μ-CH
3COO)
6 core has been developed, using a newly designed [Ru
3(μ
3-O)(μ-CH
3COO)
6(py)(CO)(H
2O)] (py = pyridine) with labile and photoactive sites.
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Sigeru Torii, Hiroshi Okumoto, Akiko Genba
1996 Volume 25 Issue 9 Pages
747-748
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The condensation of
N-(trimethylsilylmethyl)benzylamine and aldehydes spontaneously gave azomethine ylides, which react with electron deficient olefins to yield cycloadducts under mild conditions.
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Changjun Liu
1996 Volume 25 Issue 9 Pages
749-750
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An experimental investigation on oxidative synthesis of ethane and ethylene from CH
4 using CO
2 as an oxidant has been performed by streamer discharge reactions, which are initiated by an AC electric field. This gas discharge promotes the methane conversion to reach a high yield of C
2 hydrocarbons of 20%∼45% with a methane conversion of 25%∼80% and a conversion of carbon dioxide of 8%∼40%. The reactions for these conversions are: 2CH
4 + CO
2 → C
2H
6 + CO + H
2O and 2CH
4 + 2CO
2 → C
2H
4 + 2CO + 2 H
2O. A possible pathway of C
2 formation was also present in this letter.
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Itaru Hamachi, Shinya Tsukiji, Shigeaki Tanaka, Seiji Shinkai
1996 Volume 25 Issue 9 Pages
751-752
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An efficient photogeneration method for an oxidizing active species of semisynthetic myoglobin bearing ruthenium tris(2,2′-bipyridine) (Ru(bpy)
3) through intramolecular electron abstraction is described.
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Reiji Kumai, Atsushi Asamitsu, Yoshinori Tokura
1996 Volume 25 Issue 9 Pages
753-754
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A semiconducting organic radical cation salt with a magnetic anion, TMTSF·FeCl
4 (ρ
rt = 40 Ωcm), was prepared. The crystal undergoes an antiferromagnetic ordering below
TN = 4 K with the easy axis perpendicular to the TMTSF stacking direction. X-ray crystallographic analysis reveals that Cl atoms of the anions closely contact with Se atoms of the donor molecules and suggests that the spin ordering is mediated by magnetic interaction between donors and anions.
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Youzhu Yuan, Kiyotaka Asakura, Huilin Wan, Khirui Tsai, Yasuhiro Iwasa ...
1996 Volume 25 Issue 9 Pages
755-756
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Supported gold catalysts were prepared by attaching phosphine-stabilized gold complex and cluster on as-precipitated metal hydroxides M(OH)
*X (M = Mn
2+, Co
2+, Fe
3+, Ni
2+, Zn
2+, Mg
2+, and Cu
2+), followed by thermal decomposition and calcination. The obtained catalysts were remarkably active for CO oxidation at low temperatures below 273 K.
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Satoshi Ogawa, Susumu Nobuta, Ryoichi Nakayama, Yasushi Kawai, Shigeya ...
1996 Volume 25 Issue 9 Pages
757-758
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New types of stable trithioles bounds to fused aromatic systems have been synthesized and one of them, phenanthro[9,10-d][1,2,3]trithiole, has been characterized by X-ray crystallographic analysis, which has a unique helical packing arrangement.
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Dai Ooyama, Hirotaka Nagao, Noriharu Nagao, F. Scott Howell, Masao Muk ...
1996 Volume 25 Issue 9 Pages
759-760
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An oxygen transfer between the NO and the ONO ligands occurs in
cis-[Ru(NO)(ONO)(bpy)
2]
2+ when the complex undergoes a redox-induced nitrito-to-nitro linkage isomerization. Such an oxygen transfer does not occur in a themally-induced linkage isomerization reported previously.
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Yuko Takao, Tokuji Takeda, Keiko Miyashita, Jun-ichiro Setsune
1996 Volume 25 Issue 9 Pages
761-762
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N(21),N(22)-(etheno)-bridged porphyrins were metallated with PdCl
2 to give binuclear porphyrin complexes with (μ-dichloro)dipalladium(II) structure in which the terminal PdCl
2 moiety is coming close to the porphyrin plane.
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Ken’ichi Takeuchi, Yasushi Ohga, Takuhiro Ushino
1996 Volume 25 Issue 9 Pages
763-764
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The solvolysis rates of 1,1,3,3-tetramethyl-2-oxobutyl methanesulfonate (
1) have been reported to give a nicely linear Grunwald–Winstein relation, whereas those of structurally similar 1,3,3-trimethyl-2-oxocyclopentyl methanesulfonate (
2) exhibit a scattered plot and well correlated by log(
k⁄
k0) = (0.57 ± 0.07)
NOTs + (0.55 ± 0.05)
YOTs + (0.03 ± 0.09). These results indicate the difference in the direction of departure of the leaving group in the transition state.
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Kenji Ohmori, Kazuhiro Amano, Misaki Okunishi, Hisashi Chiba, Kiyoshi ...
1996 Volume 25 Issue 9 Pages
765-766
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We have measured the laser-excitation spectra of the Hg–Ar and Hg–Ne collisional quasimolecules in the far wings of the Hg 6s6p
3P0 – 6s7s
3S1 inter-excited-state transitions broadened by Ar and Ne. The simulation of the spectrum, based on an uniform-semiclassical treatment for the free-free Franck-Condon factor, has been carried out for the Hg–Ar system in order to estimate the potential curves for the
E31 and
a 30
− states of the quasimolecule.
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Jing-Ping Qü, Hiroyuki Matsuzaka, Youichi Ishii, Masanobu Hidai
1996 Volume 25 Issue 9 Pages
767-768
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A series of thiolate-bridged dinuclear ruthenium complexes containing two electron-deficient olefinic ligands [Cp
*Ru(μ-SR)
2(η
2-C
2H
3R′)
2RuCp
*] (R = Pr
i, Et, 2,6-C
6H
3Me
2 or 2,4,6-C
6H
2Me
3; R′ = CN, COOMe or CHO) have been synthesized from Ru(II)-Ru(II), Ru(II)-Ru(III) and/or Ru(III)-Ru(III) precursors, three of which have been characterized by X-ray structural analysis.
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Satoru Kobayashi, Yoon-Kab Kim, Chihiro Kenmizaki, Satoshi Kushiyama, ...
1996 Volume 25 Issue 9 Pages
769-770
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The process of gas adsorption is controlled only by temperature and pressure. When these parameters are fixed, the adsorption capability and selectivity cannot be changed. The microwave has characteristics to excite particular components such as water without destroying it. Thus, using microwaves, we have studied the adsorption of CFCs on zeolite from gas mixtures containing water which interferes with the adsoption. It was found that CFCs adsorption improved outstandingly when adsorption was conducted under microwave irradiation.
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Jun-ichi Kikuchi, Toshiyuki Ogata, Masahiko Inada, Yukito Murakami
1996 Volume 25 Issue 9 Pages
771-772
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A steroid cyclophane, having
L-lysine residues interposed between a tetraaza[6.1.6.1]paracyclophane skeleton and four cholate moieties, furnished a chiral binding site for a hydrophobic aromatic guest in a synthetic bilayer membrane as well as in aqueous solution, as evidenced by induced circular dichroism.
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Mayumi Shimizu, Yukio Nakamura, Makoto Tadokoro
1996 Volume 25 Issue 9 Pages
773-774
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Three new dinuclear ruthenium(II) complexes bridged by a pyridine-2,6-diyl-2-acetyl-6-methyl group were prepared by thermal reaction of 2,6-bis(chloromethyl)pyridine with [Ru
3(CO)
12] followed by reactions with methanol and triphenylphosphine, respectively, and the crystal structures of two of them were determined by X-ray analyses.
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Guolun Zhong, Yu Feng, Kongzhang Yang, Guiyun Zhu
1996 Volume 25 Issue 9 Pages
775-776
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Four kinds of LB films containing 0.5%Eu(TTA)
3Phen + 99.5%RE(TTA)
3Phen (in molar percentage; RE = La(III), Gd(III), Tb(III) and Y(III)) mixed with arachidic acid (AA) in molar ratio of 1:1 were fabricated. The luminescent enhancement effect of RE(TTA)
3Phen on Eu(III) was studied. The influence of rare earth ions on the efficiency of the intermolecular energy transfer in films was discussed. When the complexes of Tb(III) and Gd(III) coexist with Eu(TTA)
3Phen, the efficiency of energy transfer is higher than that of the complexes of La(III) and Y(III).
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Taiichiro Suda, Toru Iwaki, Tomio Mimura
1996 Volume 25 Issue 9 Pages
777-778
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In order to clarify the characteristic behavior of dissolved state of CO
2 in alkanolamine-H
2O system five different kinds of alkanolamines were examined spectroscopically under the following conditions: 40 °C for 30 min to 120 min. NMR analysis indicated the presence of five chemical species such as carbamate ion, free amine, bicarbonate, carbonate, and protonated amine. Based on proton NMR, distribution of the respective species against molar loading of CO
2 was successfully evaluated.
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Toshiyuki Akazawa, Masayoshi Kobayashi, Tohru Kanno, Kohei Kodaira
1996 Volume 25 Issue 9 Pages
779-780
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Two kinds of hydroxyapatite (HAp) originated from cattle bones and reagents displayed different adsorption behavior of albumin on the C-sites and lysozyme on the P-sites of the HAp surface, which was strongly influenced by the basic strength of the C-sites and the acid strength of the P-sites as well as the total amount or surface proportion of the two sites, depending on the heat-treatment temperature of the HAp’s.
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Tetsuya Shichi, Katsuhiko Takagi, Yasuhiko Sawaki
1996 Volume 25 Issue 9 Pages
781-782
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Photoirradiation of a mixture of 4-benzoylbenzoate (
1) and 4-(2-phenylethenyl)benzoate yielded regioselective oxetanes in the presence of hydrotalcite clay. Similar irradiation of a mixture of
1 and cinnamate gave rise to β-truxinate, but not oxetane. The unexpected formation of oxetanes is understood by the favorable distance between C=O and C=C bonds packed in clay interlayers.
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Kazuaki Ito, Yoshihiro Ohba, Tyo Sone
1996 Volume 25 Issue 9 Pages
783-784
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The chiral calixarene analogs bridged by a (
R,
R)-cystine unit were synthesized. NMR studies reveal that the phenol-formaldehyde moieties of the macrocycles adopt a chiral helical geometry induced by the cystine bridge and the macrocycles form a twisted concave. This helicity is enhanced at low temperature.
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Satoshi Fujii, Tetsuhiko Yoshimura, Hitoshi Kamada
1996 Volume 25 Issue 9 Pages
785-786
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NO trapping efficiencies of three water-soluble iron(III) complexes with dithiocarbamate derivatives (DTC) are investigated by electron paramagnetic resonance spectroscopy. The obtained data show the dependence on the the structure of the substituent of -NRR′ portion of DTC and on the solvent nature in which Fe-DTC complex are dissolved.
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Keiji Nishiwaki, Jun-ichi Yoshida
1996 Volume 25 Issue 9 Pages
787-788
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1,2-Bis(trimethylsilyl)-1,2-diphenylethane and its homologues were synthesized and the studies on their electochemical behavior revealed that there is definite interaction between the σ,π-interaction system (the C-Si bonds and the benzene rings) and the σ,σ-interaction system (the neighboring C-Si bonds) which causes significant decrease of the oxidation potentials.
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Tsuyoshi Ohba, Hisashi Takei
1996 Volume 25 Issue 9 Pages
789-790
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Peptidyl α,β-unsaturated nitro compounds were found to be active-site directed irreversible inhibitors of serine protease, α-chymotrypsin. The inactivation was selective because tripeptidyl derivative
4 did not show any irreversible inhibitory activity toward another serine protease, procine pancreatic elastase.
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Jianping Cai, Hisao Nemoto, Hiroyuki Nakamura, Bakthan Singaram, Yoshi ...
1996 Volume 25 Issue 9 Pages
791-792
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Trimethylsilyl-
o-carborane serves as
o-carborane carbanion upon fluoride ion promoted reaction with carbonyl compounds. Thus, in the presence of tetrabutylammonium fluoride, trimethylsilyl-
o-carborane undergoes facile, unprecedented, carbodesilylation with aromatic and aliphatic aldehydes.
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Hideaki Takahashi, Toshio Kasai, Kizashi Yamaguchi
1996 Volume 25 Issue 9 Pages
793-794
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The orientation-dependent wave packet dynamics was investigated for the dissociative energy transfer reaction : CF
3H + Ar(
3P) → CF
3* + H + Ar. Wave packets were propagated numerically by the Chebychev scheme recently developed by Kosloff
et al. The calculation was done for the two orientations of CF
3H, one is the H-end orientation and another is the CF
3-end orientation under the collinear geometry. The results showed clear orientation dependence in the dissociation process. The H-end orientation seems to give a quantum effect, while the CF
3-end does not.
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Shuichi Matsumura, Hideki Beppu, Kazuhiro Nakamura, Shuichi Osanai, Ka ...
1996 Volume 25 Issue 9 Pages
795-796
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Poly(β-malic acid) was prepared by lipase-catalyzed ring-opening polymerization of benzyl β-malolactonate with subsequent debenzylation. Benzyl β-malolactonate was readily polymerized by porcine pancreatic lipase or Novozyme 435 lipase at 60 °C to yield poly(benzyl β-malate) having a molecular weight of greater than 7000.
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Yasunori Kinoshita, Koichi Nishigaki, Yuzuru Husimi
1996 Volume 25 Issue 9 Pages
797-798
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T4 RNA ligase was shown to ligate two DNA strands contained in a double helix with a high efficiency. Experiments on substrate and temperature dependence of this reaction supported that single-stranded ends clamped by a double-stranded region are necessary for this reaction. This finding is widely useful for DNA joining.
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Hatsuo Yamamura, Hirotake Kawai, Tadahiro Yotsuya, Tamotsu Higuchi, Ya ...
1996 Volume 25 Issue 9 Pages
799-800
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A cation-complexing host, heptakis(3,6-anhydro)-β-cyclodextrin, was converted to a mono-
p-phenylazobenzoyl derivative, which exhibited alkali metal-carrying ability in CH
2Cl
2-H
2O system.
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Takanori Tano, Junzo Umemura
1996 Volume 25 Issue 9 Pages
801-802
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FT-IR spectra of black lipid films formed by dimyristoylphosphatidylcholine (DMPC) in air were recorded at various temperatures for the first time. Black lipid films drawn from a DMPC aqueous dispersion and a DMPC + 0.1 MCaCl
2 aqueous dispersion showed the gel to liquid crystal phase transition at about 24 and 27 °C, respectively.
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Atsushi Ikeda, Seiji Shinkai
1996 Volume 25 Issue 9 Pages
803-804
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A calix[4]aryl ester containing two C
60 groups changed the absorption spectra (and thus its visible color) upon changing the solvent from chloroform to chloroform : acetonitrile = 1 : 1 v/v or adding NaClO
4. The spectroscopic and light-scattering studies established that the unique behaviors can be rationalized in terms of an aggregation-deaggregation equilibrium change.
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Mikio Nakamura, Yumiko Kawasaki
1996 Volume 25 Issue 9 Pages
805-806
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Chemical oxidation of tetradurylporphyrinatoiron(III) chloride followed by the addition of 2-methylimidazole at −78 °C gave the first example of the low spin ferric porphyrin radical cation with orienta ionally fixed imidazole ligands, [Fe(TDP
•)(2-MeIm)
2]
2+. The degree of asymmetric spin distribution on the pyrrole β carbons in the radical cation was estimated to be close to that in the starting low spin complex, [Fe(TDP)(2-MeIm)
2]
+, which was ascribed to the orthogonality of porphyrin a
2u with imidazole π orbitals.
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Ayako Nishizaki, Atushi Satake, Li Chen, Shunsuke Izumi, Toshifumi Hir ...
1996 Volume 25 Issue 9 Pages
807-808
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A phosphatase (homodimer of 56 kDa subunits) having a hydrolyzing activity toward
p-nitrophenyl dihydrogenphosphate and phosphohistone was found to be secreted from cultured suspension cells of
Marchantia polymorpha into their culture medium. Such secretion of the phosphatase was promoted by addition of bornyl acetate into the culture medium.
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Mitsuaki Kodama, Hana Maeda, Hideaki Hioki
1996 Volume 25 Issue 9 Pages
809-810
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Enantioselective synthesis of (+)-(8
R,10
R)-cubitene has been achieved starting from
D-mannitol and the absolute configuration of natural cubitene isolated from termites has been determined to be 8
R, 10
R.
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Hiroshi Oda, Michiko Morishita, Keigo Fugami, Hiroshi Sano, Masanori K ...
1996 Volume 25 Issue 9 Pages
811-812
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Some alkynes were diarylated by aryltributylstannane
2 in the presence of palladium salt in moderate to good yield with high stereoselectivity. The reaction was catalytic in palladium using copper(II) chloride dihydrate as a reoxidant.
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Manabu Harata, Koichiro Jitsukawa, Hideki Masuda, Hisahiko Einaga
1996 Volume 25 Issue 9 Pages
813-814
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A unique Cu(II)-hydroxide complex, [Cu(tppa)(OH)]ClO
4 (TPPA = tris[(6-(pivaloylamino)-2-pyridyl)methyl]amine), has been obtained from the [Cu
II(tppa)(O
2−)]ClO
4 complex in a methanol solution and characterized by the electronic absorption, ESR and ESI-MAS spectra and the X-ray diffraction method.
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Naoto Koizumi, Minoru Iijima, Seiji Kasahara, Muneyoshi Yamada
1996 Volume 25 Issue 9 Pages
815-816
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The surface structure of Co-Mo/Al
2O
3 sulfided
in-situ at high pressure( ≤ 5 MPa) was characterized by FT-IR/DRA method using NO as a probe molecule. The ratio of the band intensity of NO adsorbed on Co site to that of Mo site increased, when Co-Mo/Al
2O
3 was sulfided at the pressure above 1.1 MPa. Combining the results with those found on catalysts varying the Co/Mo molar ratio, it was suggested that Co site is more effectively dispersed on Mo site by higher pressure sulfiding.
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Naotoshi Nakashima, Yonekazu Deguchi, Takashi Nakanishi, Kingo Uchida, ...
1996 Volume 25 Issue 9 Pages
817-818
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An electroactive diarylethene compound,
1 was synthesized and was embedded in a cast film of a lipid film on an electrode. This electrode device was found to possess a light-triggered optical and electrochemical switching function.
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Kazushige Maruyama, Takesi Moriguchi, Takahiro Mashino, Akira Nishinag ...
1996 Volume 25 Issue 9 Pages
819-820
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2-Aminophenol readily undergoes highly selective Co(salen) catalyzed oxygenation in methanol at room temperature resulting unexpectedly in the quantitative formation of 2-Aminophenoxazin-3-one. The oxygenation of substituted 2-aminophenols provides useful information to discuss the reaction path.
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Olaf Karthaus, Kuniharu Ijiro, Masatsugu Shimomura
1996 Volume 25 Issue 9 Pages
821-822
Published: 1996
Released on J-STAGE: March 01, 2006
JOURNAL
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The formation of ordered patterns of nanosize polystyrene aggregates was observed by atomic force scopy. The samples were prepared by simply rinsing a mica surface with a dilute polymer solution in benzene.
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