-
Yuji Sasaki, Tomo Masaki, Morihisa Saeki
2007 Volume 36 Issue 4 Pages
488-489
Published: April 05, 2007
Released on J-STAGE: February 26, 2007
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Using a new extractant,
N,
N,
N′,
N′-tetraoctyldiglycolamide (TODGA), the dependence of the distribution ratio on the ionic radii for M
II was investigated, and their relation with the structures of metal complexes were discussed. Ca
II (ionic radius: 100 pm) shows the highest
D values, and the
D values decrease with increase and decrease of ionic radius from 100 pm. The geometrical optimization by density functional theory (DFT) of M
II–TODGA complex suggests that the carbonyl oxygen has more affinity with metal than the ether oxygen, and the distance between the center of oxygen donor and the edge of cation corresponds to the van der Waals radius of oxygen atom. The most stable complex, as 1:1 complex, can be formed with Mg
II from DFT calculation, the complex becomes unstable with increase of ionic radius of M
II. This order is good agreement with the magnitude of
D for Ca
II, Sr
II, and Ba
II.
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Toshiharu Teranishi, Youhei Inoue, Masaki Saruyama, Masafumi Nakaya, M ...
2007 Volume 36 Issue 4 Pages
490-491
Published: April 05, 2007
Released on J-STAGE: March 03, 2007
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Supplementary material
Stability of anisotropically phase-segregated Co
9S
8/PdS
x nanoacorns, which we recently prepared, was improved by the addition of oleic acid or oleylamine as a stabilizer. Further investigations on the experimental conditions implied the formation of more complex PdS
x/Co
9S
8/PdS
x and Co
9S
8/PdS
x/Co
9S
8 heterostructured nanoparticles.
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Shinichi Yonemochi, Takuji Kondo, Shiori Kubo, Mikio Kawasaki, Toshio ...
2007 Volume 36 Issue 4 Pages
492-493
Published: April 05, 2007
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A fine metallic lattice framework was constructed by forming many fine projections on the upper and lower surfaces of a metal mesh by magnetoplating, in order to be used as an air purification material or a supporting material of a catalyst.
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Chunyan Miao, Gang Lü, Youwei Yao, Guoyi Tang, Duan Weng, Jianhui ...
2007 Volume 36 Issue 4 Pages
494-495
Published: April 05, 2007
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Spherical microcapsules of silica-shelled octadecane are prepared in the presence of polyvinyl alcohol in an O/W emulsion. The silica shell forms via hydrolysis and condensation from tetraethyl silicate with acetatic acid as catalyst. The thermogravimetric curves show that the microcapsules have thermal stability superior to that of octadecane. The latent heat and the melting point of microcapsule are 162 J·g
−1 and 30 °C, respectively.
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Qingwei Li, Fang Chen, Weili Zhao, Mingxiu Xu, Benjie Fang, Yuelong Zh ...
2007 Volume 36 Issue 4 Pages
496-497
Published: April 05, 2007
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Supplementary material
The study of singlet oxygen (
1O
2) emission showed that the
1O
2 could be efficiently produced in the reaction of solid potassium superoxide (KO
2) particles with chlorine gas (Cl
2), which only occurred on the surface of solid KO
2 particles. The liquid water may accelerate the reaction of Cl
2 with KO
2 and make a complete conversion of KO
2 to
1O
2. The KO
2 had a similar efficiency for
1O
2 production as the alkali metal peroxides (such as Li
2O
2 and Na
2O
2) as reacting with Cl
2.
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Kunihiro Ichimura, Ken’ichi Aoki
2007 Volume 36 Issue 4 Pages
498-499
Published: April 05, 2007
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Supplementary material
The wet bead milling of anthracence with tiny amounts of tetracene in water results in mechanochemical doping to exhibit solid-state singlet energy transfer. Changes of emission spectra are sensitive to milling conditions so that the couple can act as a fluorescent probe for milling. Perylene displays similar behavior, whereas pentacene and rubrene lead to insufficient fluorescence quenching due to their poor solubility in host crystals.
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Tsuneo Imamoto, Atsushi Kumada, Kazuhiro Yoshida
2007 Volume 36 Issue 4 Pages
500-501
Published: April 05, 2007
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Air-stable diphosphine ligand, (
R,
R)-2,3-bis((1-adamantyl)methylphosphino)quinoxaline, was prepared by the reaction of enantiomerically pure (
S)-(1-adamantyl)methylphosphine–borane with 2,3-dichloroquinoxaline. The ligand exhibited excellent enantioselectivities in Rh-catalyzed asymmetric hydrogenation and Pd-catalyzed asymmetric ring-opening reaction.
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Satoshi Kubo, Tatsuhiko Yamada, Koh Hashida, Hirokuni Ono
2007 Volume 36 Issue 4 Pages
502-503
Published: April 05, 2007
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Supplementary material
Solvolysis using mixed solvent of ethylene carbonate (EC) and ethylene glycol (EG) was applied to softwood. In this solvolysis, EG was substituted for hydroxy groups in the lignin molecules. Chain extension reaction of substituted EG occurred during the solvolysis, and DP = 3.0 of oligo EG chains are grafted by 60-min reaction. Linear EG chains are introduced into lignin molecules during the biomass conversion process without additional chemical modification.
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Koichi Iwata, Kyousuke Yoshida, Yuta Takada, Hiro-o Hamaguchi
2007 Volume 36 Issue 4 Pages
504-505
Published: April 05, 2007
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Vibrational cooling rates in room temperature ionic liquids were measured with picosecond time-resolved Raman spectroscopy. The 1570-cm
−1 Raman band of the first excited singlet (S
1) state of
trans-stilbene was used as a “Raman thermometer.” The recorded vibrational cooling rates in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (emimTf
2N) and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (bmimTf
2N) were close to those in ordinary molecular solvents despite a large difference in thermal diffusivity. The result is consistent with the assumption that local structures are formed in the ionic liquids.
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Toshio Nakamura, Xueping Ji, Kazuyoshi Endo, Daisuke Takano
2007 Volume 36 Issue 4 Pages
506-507
Published: April 05, 2007
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A functionalized stable film, polyacrylamide–(γ-cyclodextrin) (PAA–γ-CD), synthesized from polyacrylamide (PAA) and γ-cyclodextrin (γ-CD), was used to immobilize enzyme. The membrane containing γ-CD provided an excellent environment for enzymatic kinetics between tyrosinase in the membrane and the substrates in acetonitrile.
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Tetsuo Sakka, Hisayuki Oguchi, Satoru Masai, Yukio H. Ogata
2007 Volume 36 Issue 4 Pages
508-509
Published: April 05, 2007
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Emission spectroscopy of laser ablation plume can be applied to in situ elemental analysis of solid surface in liquid, especially if the laser pulse with the pulse width of 150 ns is used. The long nanosecond pulse not only suppresses the disadvantageous broadening and deformation of spectral line profiles usually observed when short nanosecond pulses are used but also greatly suppresses the material removal from analyte surfaces. The latter is also an important advantage for the application to surface analysis.
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Yutaka Mori, Akikazu Matsumoto
2007 Volume 36 Issue 4 Pages
510-511
Published: April 05, 2007
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Supplementary material
We have revealed the photoreaction mechanism for the single-crystal-to-single-crystal transformation of bis(3,4,5-trifluorobenzyl) (
E,
E)-muconate (
1) to the corresponding dimer. The [2 + 2] photodimerization randomly occurred in the columnar assembly of monomer molecules in the crystals of
1, followed by the formation of a trimer. The photoreaction was directly monitored by an X-ray single crystal structure analysis as well as the product analysis by NMR and MS spectroscopies.
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Takeshi Kashiwagi, Naohisa Suzuki, Masashi Niina, Hiroyasu Nishiguchi, ...
2007 Volume 36 Issue 4 Pages
512-513
Published: April 05, 2007
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Ni particles and Ni
3C whiskers with a novel morphology, grew on the Ni–carbon composite by heat treatment at 1073 K in Ar. Ni–carbon composites were prepared by spray pyrolysis of a solution of sucrose and NiSO
4 in Ar at 1073 K.
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Jin-Hwan Kim, Akimitsu Ishihara, Shigenori Mitsushima, Nobuyuki Kamiya ...
2007 Volume 36 Issue 4 Pages
514-515
Published: April 05, 2007
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Chromium-based electrocatalysts which were prepared using an R.F. sputter with CrC target under Ar or Ar + N
2 atmosphere with or without heating a substrate at 1073 K were evaluated as a cathode of polymer electrolyte fuel cells (PEFCs). Heating the substrate during the sputtering was found to be very useful to enhance the catalytic activity for oxygen reduction reaction (ORR). It is considered that nitride (CrN) and/or carbonitride (Cr
2C
0.39N
0.61) may have high catalytic activity for the ORR.
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Naoyuki Hoshiya, Nobuko Watanabe, Hisako K. Ijuin, Masakatsu Matsumoto
2007 Volume 36 Issue 4 Pages
516-517
Published: April 05, 2007
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Dioxetanes bearing a 1-hydroxynaphthalen-2-yl group
4(OH) or 2-hydroxynaphthalen-1-yl group
5(OH) were found to be significantly unstable thermally in contrast to their methoxynaphthyl-analogs
4(OME) and
5(OME). The marked instability of
4(OH) and
5(OH) was attributed to the intramolecular hydrogen bonding of a hydroxy group on the naphthalene ring.
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Shigehito Deki, Hidenori Miki, Mune-aki Sakamoto, Minoru Mizuhata
2007 Volume 36 Issue 4 Pages
518-519
Published: April 05, 2007
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Liquid-phase deposition, LPD, method was used for the fabrication of copper ferrite (CuFe
2O
4) thin film from aqueous solution system of FeOOH–NH
4·HF (aq.) and Cu source (Cu(NO
3)
2 or CuCl
2) with H
3BO
3. SEM observation revealed that highly homogeneous thin film was formed on a substrate. In X-ray diffraction measurements, major peaks assigned to CuFe
2O
4 was observed in heat-treated films. Quantitative analysis of elements in the deposited films indicated the deposition of CuFe
2O
4. The kinds of Cu-source did not affect on the deposition. Initial content of Cu
2+ could alter the Fe/Cu atomic ratio in deposited film.
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Yan Zheng, Ju Wu, Fang Duan, Yi Xie
2007 Volume 36 Issue 4 Pages
520-521
Published: April 05, 2007
Released on J-STAGE: March 10, 2007
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Supplementary material
The m-BiVO
4 hierarchical frameworks were synthesized using a novel Gemini surfactant-monoalkylated disulfonated diphenyl oxide surfactant (C
12-MADS) as the structure-directing reagent and as-obtained m-BiVO
4 nanomaterials exhibited good photocatalysis for degradation of rhodamine B (RhB) under visible light.
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Hideyoshi Miyake, Shouko Nishino, Akinori Nishimura, Mitsuru Sasaki
2007 Volume 36 Issue 4 Pages
522-523
Published: April 05, 2007
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A new synthesis of 3-bromoflavones from 1-(2-hydroxyphenyl)-3-arylpropane-1,3-dione using CuBr
2 is described. The usefulness of 3-bromoflavone as a precursor of 3-aminoflavone is also described.
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Takeshi Itakura, Ryo Sasai, Hideaki Itoh
2007 Volume 36 Issue 4 Pages
524-525
Published: April 05, 2007
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The detoxification of water contaminated by antimony and its resource recovery are achieved by hydrothermal mineralization treatment. The treatment is based on the precipitation method of a mineral from aqueous media by imitating natural mineralization mechanism derived from activity of magma. The treatment could reduce Sb concentration in aqueous media, when the formed mineral was Ca
2(Sb
2O
7), which resembled natural mineral of Monimolite ((Pb,Ca)
2Sb
2O
7). The antimony concentration in water after the hydrothermal mineralization under optimal conditions was 0.06 mg/dm
3. Additionally, the rapid cooling of the treated water made much progress in the treatment efficiency to disturb the re-dissolution of the formed mineral. Therefore, this treatment is effective for detoxification of water polluted by antimonic species and its resource recovery.
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Hideki Kurihara, Tatuhiko Yajima
2007 Volume 36 Issue 4 Pages
526-527
Published: April 05, 2007
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Atmospheric pressure microwave plasma (APMP) could be easily generated even in air by using carbon felt pieces impregnated with a metal salt such as alkali metal chlorides, alkali earth metal chlorides, and so on (CF/metal salt). As one of applications, the decomposition and complete removal of toluene, one of volatile organic compounds (VOCs) as environmental air pollutants, with APMP assisted by CF/NaCl and CF/CaCl
2 was examined. Consequently, we succeeded in decomposing and removing it completely without carbon monoxide formation and CF consumption.
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Ryoichi Kuwano, Hiroki Kusano
2007 Volume 36 Issue 4 Pages
528-529
Published: April 05, 2007
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Supplementary material
The nucleophilic substitution of diarylmethyl carbonates with malonate carbanions proceeded in the presence of [Pd(π-C
3H
5)(cod)]BF
4–Cy-Xantphos, giving the desired (diarylmethyl)malonates in up to 90% yield. The yield was extremely affected by choice of the phosphine ligand.
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Takashi Yanagishita, Kenji Yasui, Toshiaki Kondo, Yasushi Kawamoto, Ka ...
2007 Volume 36 Issue 4 Pages
530-531
Published: April 05, 2007
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Antireflection (AR) polymer structures composed of tapered conical pillars were fabricated using highly ordered anodic porous alumina. The shape of the holes in the anodic porous alumina was controlled by performing repeated anodization and pore-widening treatments. By replicating the structure of the anodic porous alumina with PMMA, polymer AR structures were obtained.
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Megumi Omura, Katsuyuki Iwanami, Takeshi Oriyama
2007 Volume 36 Issue 4 Pages
532-533
Published: April 05, 2007
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In the presence of alkoxytrimethylsilane and a catalytic amount of iron(III) chloride, the reaction of various carbonyl compounds with trimethylsilyl azide afforded the corresponding α-alkoxy azides. This reaction could be suitable especially for azidation of aromatic aldehydes and proceeds under mild conditions in a convenient one-pot manner.
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Youhei Numata, Katsuya Inoue
2007 Volume 36 Issue 4 Pages
534-535
Published: April 05, 2007
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Supplementary material
We measured angular dependences of single-crystal magnetization for the chiral structural molecule-based metamagnet [Mn(hfac)
2]·BNO
* (
1). This crystal shows remarkable crystal direction dependences of spin flip transition in all crystallographic
a,
b, and
c axes and the transitions are observed at different critical magnetic fields (
H ||
a: 640 Oe,
H ||
b: 1000 Oe, and
H ||
c: 1250 Oe at 2 K). These results mean that
1 has independent antiferromagnetic multi-sublattices. We calculated its possible magnetic structure from magnetic data and constructed magnetic structural model.
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Toshifumi Iimori, Toshio Naito, Nobuhiro Ohta
2007 Volume 36 Issue 4 Pages
536-537
Published: April 05, 2007
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Photoirradiation effects on conductivity in the organic salt α-(BEDT-TTF)
2I
3 at temperatures close to the metal–insulator (M–I) phase boundary are investigated using time-resolved measurements of photocurrent. The transient photocurrent at 115 K shows a remarkable persistence at the metallic conductivity and a nonlinear dependence on the light intensity, probably originating from the photoinduced M–I phase conversion in the presence of electric fields.
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Shin Iwata, Toshiyuki Hamura, Takashi Matsumoto, Keisuke Suzuki
2007 Volume 36 Issue 4 Pages
538-539
Published: April 05, 2007
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Supplementary material
Organoaluminum reagents catalyze the addition of ketene silyl acetals to esters, affording the β-keto ester derivatives in good to excellent yields.
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Hiroyuki Kurata, Masahiro Kyusho, Yuichi Nishimae, Kouzou Matsumoto, T ...
2007 Volume 36 Issue 4 Pages
540-541
Published: April 05, 2007
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Supplementary material
The title compound, a new anthracene-containing triptycene derivative, was synthesized. The crystal structure shows its strained configuration and intermolecular π–π stacking arrangement. Photochemical [4 + 4] dimerization occurs easily in solution and in the solid state, even under visible-light irradiation.
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Shi Li, Jingtang Zheng, Weiya Yang, Yucui Zhao
2007 Volume 36 Issue 4 Pages
542-543
Published: April 05, 2007
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Three-dimensionally ordered macroporous (3DOM) inorganic oxides, SiO
2 and TiO
2, have been synthesized by combining template-assisted colloidal method with sol–gel technique. Close-packed PS beads were first prepared as template by using gravitational sedimentation, followed by infiltration with corresponding sol precursors rather than corresponding alkoxides, and then templates were removed by calcination. The morphology and crystalloid structure of samples were investigated by SEM and XRD, respectively. The results indicate that the structures of samples are well-inverse replicas of PS template and the method is also applicable to the preparation of other oxides.
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Nobukazu Negishi, Yutaka Ie, Hirokazu Tada, Takahiro Kaneda, Yoshio As ...
2007 Volume 36 Issue 4 Pages
544-545
Published: April 05, 2007
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Supplementary material
The dendritic oligothiophene/[60]fullerene linkage molecules have been synthesized, and their electronic properties were characterized by spectroscopic and electrochemical measurements. The FET devices were fabricated with their spin-coated films and their performances were investigated.
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Izuru Takei, Koji Kobayashi, Keita Dohki, Shoken Nagao, Yasushi Mizobe ...
2007 Volume 36 Issue 4 Pages
546-547
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Supplementary material
Treatment of [(Cp
*Mo)
3(μ
3-S)
4RuH
2(PPh
3)][PF
6] (
1; Cp
* = η
5-C
5Me
5) with aqueous HCl afforded the trichloride cluster [(Cp
*Mo)
3(μ
3-S)
4RuCl
3] (
2), which was reduced with Cp
2Co in the presence of PR
3 under H
2 to give the hydride cluster [(Cp
*Mo)
3(μ
3-S)
4RuH(PR
3)] (R = Cy (
3a),
i-Pr (
3b); Cy =
cyclo-C
6H
11). Cluster
3 was further converted into the chloride cluster [(Cp
*Mo)
3(μ
3-S)
4RuCl(PR
3)] (R = Cy (
4a),
i-Pr (
4b)) by reaction with CCl
4. Reaction of cluster
4 with NaPF
6 under CO resulted in the formation of the carbonyl cluster [(Cp
*Mo)
3(μ
3-S)
4Ru(CO)(PR
3)][PF
6] (R = Cy (
5a),
i-Pr (
5b)), while the reaction under H
2 gave the dihydride cluster [(Cp
*Mo)
3(μ
3-S)
4RuH
2(PR
3)][PF
6] (R = Cy (
6a),
i-Pr (
6b)).
View full abstract
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In Sung Chun, Kil Sun Lee, Jongki Hong, Youngkyu Do, Ok-Sang Jung
2007 Volume 36 Issue 4 Pages
548-549
Published: April 05, 2007
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Supplementary material
Spherical morphology with diameters of 300–500 nm is easily formed by a reaction of palladium(II) species in water with bis(nicotinoyl)-4,4′-thiophenolate in acetone and followed by evaporation of acetone. The surface hydrophilicity of the spheres is strongly dependent on the counter anions of the complexes.
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Takeru Ishino, Takeshi Oriyama
2007 Volume 36 Issue 4 Pages
550-551
Published: April 05, 2007
Released on J-STAGE: March 21, 2007
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A highly enantioselective asymmetric conjugate addition of thiols to α,β-unsaturated aldehydes has been achieved catalyzed by newly designed organocatalyst without solvent.
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Shyamaprosad Goswami, Annada C. Maity, Hoong-Kun Fun
2007 Volume 36 Issue 4 Pages
552-553
Published: April 05, 2007
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Supplementary material
A general synthesis of 6-trichloromethylpterin, 2-chloro-3-trichloromethylquinoxaline and 2-amino-7-trichloromethyl-1,8-naphthyridine along with a series of trichloromethyl heterocycles (
1–
11) has been reported in one-pot mild neutral condition in good yield. This method is compared with the usual method using phosphorus pentachloride in phosphorus oxychloride.
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Hiroshi Tsukube, Keiko Yano, Akito Ishida, Satoshi Shinoda
2007 Volume 36 Issue 4 Pages
554-555
Published: April 05, 2007
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Supplementary material
A series of trivalent lanthanide complexes were immobilized on SPR sensory chips and protein separation membranes. They worked as alternatives to transition-metal complexes in detection and separation of histidine-tagged ubiquitin protein. Since the highly coordinated complex between NTA ligand, Eu
3+ center, and hexahistidine moiety exhibited the enhanced luminescence, the present system provides a further possibility for use in in-situ optical protein imaging process.
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Hirokazu Urabe, Daisuke Shikanai, Kyohei Arayama, Takayuki Sato, Ryoic ...
2007 Volume 36 Issue 4 Pages
556-557
Published: April 05, 2007
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When an electrophile (H
+ or an alkyl halide) was added to a mixture of 1-aryl-2-aza-1,3-butadiene and allyl Grignard reagent, selective assembly of the azadiene, nucleophiles, and an electrophile took place to give α,α′-diallylated amine in one pot.
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Takashi Hisatomi, Kazuya Hasegawa, Kentaro Teramura, Tsuyoshi Takata, ...
2007 Volume 36 Issue 4 Pages
558-559
Published: April 05, 2007
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The spinel-type oxynitride of zinc and titanium (Zn
xTiO
yN
z) reduces H
+ to H
2 and oxidizes H
2O to O
2 in the presence of a sacrificial electron donor and acceptor under visible light irradiation (λ > 420 nm). Zn
xTiO
yN
z is a d
0–d
10 complex oxynitride photocatalyst that has the potential to be active for water splitting under visible light.
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Xiao Kai Hu, De Kun Ma, Jian Bo Liang, Sheng Lin Xiong, Jiang Ying Li, ...
2007 Volume 36 Issue 4 Pages
560-561
Published: April 05, 2007
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Supplementary material
V
2O
5·
nH
2O nanosheets are fabricated hydrothermally with the acidified peroxovanadate solution at 200 °C for 12 h. The X-ray diffraction suggests that V
2O
5·
nH
2O nanosheets display lamellar ordering along
c-axis direction. Transmission electron microscopy, field-emission scanning electron microscopy, and selected area electron diffraction indicate that V
2O
5·
nH
2O nanosheets are very thin in thickness and micron-sized in lateral dimension, and they are two-dimensional crystallites. X-ray photoelectron spectroscopy and thermogravimetric analysis are utilized to confirm the elemental composition of nanosheets. The formation process of nanosheets is also discussed in terms of time- and temperature-controlled experiments.
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Masayoshi Tanaka, Makoto Hattori, Takatoshi Kinoshita
2007 Volume 36 Issue 4 Pages
562-563
Published: April 05, 2007
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The mixture of β-sheet peptide–PEG diblock copolymer and β-sheet peptide spread at air/water interface formed a two-dimensional array of the fibrous objects. The fibrous objects constructed by intermolecular hydrogen bonding of β-sheet peptides were regulated by compressing of the monolayer. When the spread peptide moieties fully located on the water surface, the distance between the fibers was efficiently modulated by the fraction of PEG segments.
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Zhongqing Lu, Wenjing Hou, Xiaqin Wu, Hexing Li, Jun Chen
2007 Volume 36 Issue 4 Pages
564-565
Published: April 05, 2007
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Direct electron transfer between chloroperoxidase (CPO) from Caldariomyces fumago and gold electrode has been achieved by layer-by-layer adsorption of CPO and polydimethyldiallylammonium chloride (PDDA) monolayers on a gold electrode. QCM frequency shift demonstrated monolayer formed during each adsorption. Electrochemical characterization studies show thin layer properties of these PDDA–CPO–PDDA films. The PDDA–CPO–PDDA ultra-thin films were stable, up to 97% electrochemical activity remained after two days storage in phosphate buffer pH 5.
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Takashi Sugimura, Kazutake Hagiya
2007 Volume 36 Issue 4 Pages
566-567
Published: April 05, 2007
Released on J-STAGE: March 27, 2007
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Di-2-methoxyethyl azodicarboxylate (DMEAD) was prepared as an alternative of DEAD or DIAD for the Mitsunobu reaction. Removal of the hydrazinedicarboxylate generated from DMEAD becomes much easier owing to the polar and water-soluble property.
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Norihito Kijima, Yasuhiko Takahashi, Hiroshi Hayakawa, Junji Awaka, Ju ...
2007 Volume 36 Issue 4 Pages
568-569
Published: April 05, 2007
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Ultrafine α-Fe
2O
3 nanoparticles with an extremely narrow distribution were prepared by microwave heating. The average diameter of the particles was approximately 7 nm. These nanoparticles were extremely stable in the colloidal state, even in the absence of stabilizers. The obtained α-Fe
2O
3 nanoparticles worked as a rechargeable electrode material. An initial discharge capacity exceeded 400 mA h g
−1 (cut-off voltage: 1.0 V).
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Kei Shimoda, Yoko Kondo, Masaaki Akagi, Koichi Abe, Hatsuyuki Hamada, ...
2007 Volume 36 Issue 4 Pages
570-571
Published: April 05, 2007
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α-Tocopheryl disaccharides such as β-gentiobioside, β-maltoside, β-cellobioside, β-lactoside, β-melibioside, and β-isomaltoside were synthesized by biological and chemical glycosylation, and their inhibitory effects on superoxide generation from rat neutrophils were examined.
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Shunsuke Sata, Takeyoshi Okajima, Fusao Kitamura, Kazuhiro Kaneda, Tak ...
2007 Volume 36 Issue 4 Pages
572-573
Published: April 05, 2007
Released on J-STAGE: April 05, 2007
JOURNAL
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Ta
2O
5-coated Pt electrodes prepared by electrodeposition of Ta and the subsequent calcination were found to possess a remarkably enhanced adsorption/desorption characteristic of hydrogen atoms in sulfuric acid solutions compared with bare Pt electrodes. This enhancement can be explained by a spillover–reverse spillover of hydrogen atoms adsorbed at Pt sites over the Ta
2O
5 surface.
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Dahu Yao, Guangji Li, Minhua Zong
2007 Volume 36 Issue 4 Pages
574-575
Published: April 05, 2007
Released on J-STAGE: April 05, 2007
JOURNAL
RESTRICTED ACCESS
Terpolymer of 1,8-octanediol, adipic acid, and
L-malic acid was synthesized via a lipase-catalyzed direct polycondensation in different organic solvents. The results of GPC show that an organic solvent possessing low polarity is a better organic medium for the lipase-catalyzed polymerization. The
1H NMR spectra of the obtained copolymer samples indicate that hydroxy groups of
L-malic acid do not take part in the polymerization reaction.
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