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Volume 32, Issue 5
Displaying 1-31 of 31 articles from this issue
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Md. Abdul Khaleque, Yukihisa Okumura, Satoshi Yabushita, Michiharu Mit ...2003 Volume 32 Issue 5 Pages 416-417
Published: 2003
Released on J-STAGE: April 02, 2003
JOURNAL RESTRICTED ACCESSIn situ formation of disulfide linkages between liposomes and Sephacryl gel particles both of that were bearing mercapto moieties was demonstrated. The reaction led to immobilization of the liposomes on the gel. The immobilized liposomes could be detached by reductive treatment of the liposome-gel conjugate, and the resulting gel was still capable of further immobilizing liposomes.View full abstract -
Shigeki Katogi, Masami Yusa, Masamitsu Shirai, Masahiro Tsunooka2003 Volume 32 Issue 5 Pages 418-419
Published: 2003
Released on J-STAGE: April 02, 2003
JOURNAL RESTRICTED ACCESSSensitized base generation from an amineimide is achieved by using triplet-sensitizers having a triplet energy of more than 289 kJ·mol−1, which enables the lower temperature curing of an epoxide/thiol system with a low UV dose.View full abstract -
Atsuhito Kuboki, Toru Yamamoto, Susumu Ohira2003 Volume 32 Issue 5 Pages 420-421
Published: 2003
Released on J-STAGE: April 02, 2003
JOURNAL RESTRICTED ACCESS(±)-Aiphanol has been stereoselectively synthesized through IBX-mediated o-quinone formation, and through [4+2] cycloaddition of the o-quinone and cinnamyl alcohol unit.View full abstract -
Hiroyuki Kurata, Kenji Haruki, Hiromichi Nakaminami, Takeshi Kawase, M ...2003 Volume 32 Issue 5 Pages 422-423
Published: 2003
Released on J-STAGE: April 02, 2003
JOURNAL RESTRICTED ACCESSThe McMurry coupling of tris(5-formyl-2-thienyl)methane afforded an unsubstituted, etheno-bridged trithienylmethanophane which was in turn transformed to novel cage-molecular monocation, dication, and dianion of substantial stability. The latter two species are the first examples of fully conjugated ionic cyclophane cage molecule.View full abstract -
Jiuling Chen, Xiumin Li, Yongdan Li, Yongning Qin2003 Volume 32 Issue 5 Pages 424-425
Published: 2003
Released on J-STAGE: April 02, 2003
JOURNAL RESTRICTED ACCESSVery active and stable high-nickeled Ni–Cu–alumina catalysts were used to produce hydrogen and nanocarbon by direct decomposition of undiluted methane at 773–1013 K. The growth way of nanocarbon depends on reaction temperatures and may be related with the catalyst stability.View full abstract -
Guozhen Shen, Di Chen, Xuan Jiang, Kaibin Tang, Yankuan Liu, Yitai Qia ...2003 Volume 32 Issue 5 Pages 426-427
Published: 2003
Released on J-STAGE: April 09, 2003
JOURNAL RESTRICTED ACCESSA rapid ethylenediamine-assisted polyol (ENAP) process has been proposed to synthesize SnSe nanowires with high aspect ratio for the first time. The product was characterized by X-ray powder diffraction and transmission electron microscope. It was found that ethylenediamine has a great influence on the morphology and purity of the final products.View full abstract -
Guy A. Hembury, Victor V. Borovkov, Juha M. Lintuluoto, Yoshihisa Inou ...2003 Volume 32 Issue 5 Pages 428-429
Published: 2003
Released on J-STAGE: April 09, 2003
JOURNAL RESTRICTED ACCESSIt was found that FeD adopted a stable syn conformation as a result of the inclusion of atomic oxygen in a μ-oxo fashion, but on exposure to acidic conditions converted into the extended anti form. When this was subsequently made basic the syn conformation was re-adopted, simply due to re-inclusion of atomic oxygen forming the μ-oxo species. It was found that the combination of these affects allowed FeD to undergo repeated conformational switching cycles that were reproducible and robust.View full abstract -
Kozo Toyota, Subaru Kawasaki, Akitake Nakamura, Masaaki Yoshifuji2003 Volume 32 Issue 5 Pages 430-431
Published: 2003
Released on J-STAGE: April 09, 2003
JOURNAL RESTRICTED ACCESSA new bulky bromobenzene, 2-bromo-1,3-di-tert-butyl-5-methoxybenzene, was prepared and utilized to preparations of the corresponding diphosphene and fluorenylidenephosphine including low-coordinate phosphorus atom(s). An electronic perturbation of the p-methoxy group in the system was indicated by UV–vis spectra and 31P NMR chemical shifts.View full abstract -
Suwabun Chirachanchai, Suttinun Phongtamrug, Apirat Laobuthee2003 Volume 32 Issue 5 Pages 432-433
Published: 2003
Released on J-STAGE: April 16, 2003
JOURNAL RESTRICTED ACCESSA macrocyclic ether produced from benzoxazine dimers and ditosylated diethylene glycols is a model to show that the cyclization occurs when intramolecular hydrogen bond of benzoxazine dimer is eliminated in the strong basic condition via a selective [2 + 2] pathway without metal template effect. Macrocyclic ethers perform inclusion phenomena at host-guest stoichiometric ratios of 1:1, and 2:1 depending on the type of metal ion, as clarified by UV and 1H NMR.View full abstract -
Ki-Hyouk Choi, Yozo Korai, Isao Mochida2003 Volume 32 Issue 5 Pages 434-435
Published: 2003
Released on J-STAGE: April 16, 2003
JOURNAL RESTRICTED ACCESSA high boiling fraction of straight run gas oil, which contained 4,6-DMDBT by addition but free from dimethylbiphenyl and dimethylcyclohexylbenzene of its HDS products, was desulfurized over commercial catalysts to find principal products of 4,6-DMDBT. Thus, HDS of 4,6-DMDBT in the high boiling fraction of real feed was proved to proceed principally through hydrogenative route. During the HDS of the fraction, 4,6-DMDBT was found to be produced from trimethyldibenzothiophenes. This activity depended very much on the acidity of the catalyst.View full abstract -
Tsukasa Tamai, Koji Inazu, Ken-ichi Aika2003 Volume 32 Issue 5 Pages 436-437
Published: 2003
Released on J-STAGE: April 16, 2003
JOURNAL RESTRICTED ACCESSCFC12 (CCl2F2) decomposition with simultaneous halogen fixation by MgO was significantly promoted by supporting transition metal oxides. Vanadium oxides were the most effective and over 80% of halogen was fixed as magnesium halides in 3.3 h (stoichiometric CFC12 feeding to MgO) at 723 K.View full abstract -
Eriko Nango, Fumitaka Kudo, Tadashi Eguchi, Katsumi Kakinuma2003 Volume 32 Issue 5 Pages 438-439
Published: 2003
Released on J-STAGE: April 16, 2003
JOURNAL RESTRICTED ACCESSThe reaction stereochemistry of 2-deoxy-scyllo-inosose (DOI) synthase (DOIS) derived from butirosin-producing Bacillus circulans, the key starter enzyme of 2-deoxystreptamine biosynthesis, was closely analyzed by use of the purified recombinant DOIS. The stereochemical pathway of the DOIS reaction is common in the aminoglycoside-producing Bacillus and Streptomyces, but is distinct from a related dehydroquinate synthase reaction in the shikimate pathway. Evolutionary relationship between these enzymes is also discussed.View full abstract -
Shu-Yong Zhang, Xiu-Yun Zhang, Zuo-Shan Zhang, Yan Kong, Shou-Nan Hua2003 Volume 32 Issue 5 Pages 440-441
Published: 2003
Released on J-STAGE: April 16, 2003
JOURNAL RESTRICTED ACCESSDinitrogen was reduced electrochemically at ambient temperature and pressure in aqueous solution over ruthenium catalyst. It was found that the chemically deposited ruthenium loaded on active carbon was an effective catalyst with good activity and stability for nitrogen reduction. A peak with many shoulders corresponding to the reduction of dinitrogen to ammonia was first observed in the difference linear sweep voltammogram.View full abstract -
Takashi Hashihayata, Hiroki Mandai, Teruaki Mukaiyama2003 Volume 32 Issue 5 Pages 442-443
Published: 2003
Released on J-STAGE: April 16, 2003
JOURNAL RESTRICTED ACCESSMannosylation of several glycosyl acceptors with a novel mannosyl donor having the 6-nitro-2-benzothiazoate function at an anomeric position proceeded smoothly in the presence of a catalytic amount of tetrakis(pentafluorophenyl)boric acid [HB(C6F5)4] to afford the corresponding disaccharides in high yields with good to high β-stereoselectivities.View full abstract -
Hai Yan Xu, Hao Wang, Zhi Qiang Song, Yao Wu Wang, Yong Cai Zhang, Hui ...2003 Volume 32 Issue 5 Pages 444-445
Published: 2003
Released on J-STAGE: April 16, 2003
JOURNAL RESTRICTED ACCESSγ-LiV2O5 nanorods with diameters of 30–40 nm and lengths of 0.4–2 μm have been synthesized by a simple solvothermal method at 160 °C using ethanol as a solvent, which also serves as a reducing agent. The γ-LiV2O5/Li cell demonstrated an initial specific capacity of 259 mAh/g. After several initial cycling, the cell showed stabilized cycling behavior (199 mAh/g at the 20th cycle).View full abstract -
S. H. Park, S. K. Kang, Y. C. Kang, Y. S. Lee, Y. K. Sun2003 Volume 32 Issue 5 Pages 446-447
Published: 2003
Released on J-STAGE: April 16, 2003
JOURNAL RESTRICTED ACCESSLi[Ni1/2Mn1/2]O2 material was synthesized by ultrasonic spray pyrolysis method. Li[Ni1/2Mn1/2]O2 was characterized by means of X-ray diffraction, charge/discharge cycling, and cyclic voltammetry. The discharge capacities of Li/Li[Ni1/2Mn1/2]O2 cell at 30 and 55 °C slowly decreased with cycling and remained at 166 and 175 mAh/g after 50 cycles, which are 99 and 94% of initial capacities, respectively. The cyclic voltammogram studies of the Li[Ni1/2Mn1/2]O2 electrode showed only one redox peak. This phenomenon might be related to the initial activation process and/or stabilization of Li[Ni1/2Mn1/2]O2 electrode.View full abstract -
Yuan-tao Chen, Qiao-yu Sun, Hu-lin Li2003 Volume 32 Issue 5 Pages 448-449
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSTubular selenium has been synthesized successfully by reducing selenious acid with ascorbic acid in the presence of primary amines (CnH2n+1NH2 with 10≤n≤16) at room temperature.View full abstract -
Hiroyuki Ohno, Chiiko Suzuki, Kenta Fukumoto, Masahiro Yoshizawa, Kyok ...2003 Volume 32 Issue 5 Pages 450-451
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSModification of cytochrome c (cyt.c) by poly(ethylene oxide) (PEO) chains enabled the protein soluble in 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ionic liquid without denaturation. However, as the solution was full of ions, suitable supporting electrolyte (KCl) was essential for the electron transfer reaction of cyt.c in the ionic liquid to attain adequate ion size for the active center.View full abstract -
Mari Yamamoto, Masami Nakamoto2003 Volume 32 Issue 5 Pages 452-453
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSControlled thermolysis of gold(I) complex, [Au(C13H27COO)(PPh3)], at 180 °C for 5 h under an N2 atmosphere affords the new type of monodispersed spherical gold nanoparticles capped by myristate and a small amount of PPh3 ligands (average diameter 23 ± 1.5 nm), in spite of no use of solvent, reducing agent and stabilizer.View full abstract -
Tetsutaro Hattori, Yutaka Suzuki, Sotaro Miyano2003 Volume 32 Issue 5 Pages 454-455
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSAryl- and allylsilanes are carboxylated with CO2 with the aid of aluminum-based Lewis acids, to give aromatic and β,γ-unsaturated carboxylic acids in fair to good yields, respectively. Formation of the former is rationalized by an aromatic electrophilic substitution by CO2 activated by the Lewis acid, while the latter a nucleophilic addition of in situ-generated allylaluminum species to CO2.View full abstract -
Naotoshi Nakashima, Shingo Okuzono, Hiroto Murakami, Tonau Nakai, Keni ...2003 Volume 32 Issue 5 Pages 456-457
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSTransmission electron microscopy, atomic force microscopy, and UV-vis-NIR absorption spectroscopy have revealed that deoxyribonucleic acid (DNA) molecules dissolve single-walled carbon nanotubes in an aqueous solution.View full abstract -
Jianrong Zhang, Lian Gao2003 Volume 32 Issue 5 Pages 458-459
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSSnO2 sols were prepared by the sol-gel method starting from granulated tin. Calcining the dried gel powder at 773 K for 2 h formed almost monodispersed SnO2 nanoparticles whose average diameter was 5 nm and surface area as high as 143 m2/g.View full abstract -
Qinghong Zhang, Lian Gao2003 Volume 32 Issue 5 Pages 460-461
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSHydroxy-free anatase TiO2 nanocrystals (25 nm) with photocatalytic activities higher than that of commercial photocatalyst Degussa P-25, were prepared by nonhydrolytic thermolysis of ammonium titanyl sulfate at 700 °C for 2 h.View full abstract -
Takashi Nakagawa, Hidehiko Fujisawa, Teruaki Mukaiyama2003 Volume 32 Issue 5 Pages 462-463
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSLithium acetate-catalyzed aldol reaction between trimethylsilyl enolates and aldehydes proceeded smoothly in a DMF or pyridine solvent to afford the corresponding aldols in good to high yields under weakly basic conditions.View full abstract -
Yun Shi, Akinori Kuzuya, Makoto Komiyama2003 Volume 32 Issue 5 Pages 464-465
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSTwo phosphoramidite monomers bearing acridine, which differ in the configuration at the branching point of the linker, have been synthesized and incorporated in DNA. In site-selective RNA scission by Lu(III), the DNA derived from L-threoninol linker is 2.5 times as effective as that from D-threoninol, confirming the importance of appropriate stereochemistry for efficient RNA activation.View full abstract -
Catharina T. Migita, Kouto Migita2003 Volume 32 Issue 5 Pages 466-467
Published: 2003
Released on J-STAGE: April 23, 2003
JOURNAL RESTRICTED ACCESSTo develop the spin trapping utility for the detection of N-centered radicals generated in biological systems, 5,5′-dimethylpyrroline-1-oxide (DMPO) and 5-diethoxyphosphoryl-5-methyl-1-pyrroline-N-oxide (DEPMPO), have been applied for the detection of chemically generated N-centered radicals in aqueous solution. Both spin traps yielded N-radical adducts, which were characterized by the EPR parameters.View full abstract -
Tetsushi Ohmura, Wasuke Mori, Hiroki Hiraga, Masato Ono, Yuko Nishimot ...2003 Volume 32 Issue 5 Pages 468-469
Published: 2003
Released on J-STAGE: April 25, 2003
JOURNAL RESTRICTED ACCESSA new series of dinuclear ruthenium(II,II) dicarboxylates, but not dinuclear ruthenium(II,III) dicarboxylates, have been prepared. Dinuclear ruthenium(II,II) dicarboxylates, which have a regular two- or three-dimensional network structure, occlude large amounts of gas. The maximum amount of N2 gas that can be occluded by these complexes is 1.0–1.7 moles per mole of ruthenium atoms, indicating the presence of a large number of micropores. These complexes exhibited pore volume-dependent catalytic activity for the hydrogenation of ethylene.View full abstract -
Kaori Tajima, Won Jong Kim, Yuichi Sato, Toshihiro Akaike, Atsushi Mar ...2003 Volume 32 Issue 5 Pages 470-471
Published: 2003
Released on J-STAGE: April 25, 2003
JOURNAL RESTRICTED ACCESSThe simple cationic peptides containing arginine moieties were proved to accelerate DNA strand exchange reaction.View full abstract -
Aya Yamada, Yoshiro Ono, Akiko Kida, Kenji Namiki2003 Volume 32 Issue 5 Pages 472-473
Published: 2003
Released on J-STAGE: April 25, 2003
JOURNAL RESTRICTED ACCESSThe bioavailability of cadmium, lead, and chromium leaching from soil was determined by an in vitro experiment utilizing artificial stomach and small intestine solutions. The dissolved concentrations of these metals in the model stomach + small intestine condition was lower than those found in the model stomach as a result of the re-adsorption to the soil by titration from pH 2.0 to 7.0.View full abstract -
Jinxi Chen, Zhicheng Liu, Ting Yu, Zhenxia Chen, Jinyu Sun, Linhong We ...2003 Volume 32 Issue 5 Pages 474-475
Published: 2003
Released on J-STAGE: April 25, 2003
JOURNAL RESTRICTED ACCESSA new interpenetrating three dimensional open metal–organic framework [Zn8(GeO4)(C8H4O4)6]n, constructed by Zn8(GeO4) secondary building units is reported. It is a rare example of metal–organic frameworks based on the heterometallic cluster secondary building units. Thermogravimetric analysis shows that it is thermally stable up to 320 °C.View full abstract
Additions and Corrections
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2003 Volume 32 Issue 5 Pages 476
Published: 2003
Released on J-STAGE: April 25, 2003
JOURNAL RESTRICTED ACCESS
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