-
Justas Barauskas, Markus Johnsson, Tommy Nylander, Fredrik Tiberg
2006 Volume 35 Issue 8 Pages
830-831
Published: 2006
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A liquid-crystalline nanoparticles with internal reversed hexagonal structure has been prepared by use of a single lipid system. The obtained particles are essentially monocrystalline nanoporous hexagonal prisms with the size of about 200 nm.
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Kazutaka Hirakawa, Toru Hirano
2006 Volume 35 Issue 8 Pages
832-833
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The study of near-infrared emission has shown that singlet oxygen (
1O
2) is generated via superoxide by the photocatalytic reaction of titanium dioxide (TiO
2) dispersed in solvents. The
1O
2 was deactivated on the TiO
2 surface and could not oxidize nicotinamide adenine dinucleotide, which has no affinity to the TiO
2 surface. The generation of photocatalytic
1O
2 was enhanced in the phospholipid membrane, and a water soluble protein acted as an effective scavenger of the generated
1O
2. These findings suggest that
1O
2 generated by TiO
2 contributes to the phototoxic effect through the oxidation of the membrane protein.
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Tasuku Hirayama, Masayasu Taki, Motoyoshi Nakamura, Toshiaki Arata, Yu ...
2006 Volume 35 Issue 8 Pages
834-835
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Supplementary material
A new water soluble 2,2-bifunctionalized spin label (2,2E-BSL) having pyrrolidine nitroxide moiety was synthesized starting from a nitro compound with two hydroxymethyl group converted to the linkers of the 2,2E-BSL, and was applied to label troponin C (TnC). Labeled TnC through two linkages were successfully isolated, and 2,2E-BSL was proved to be immobilized on TnC by EPR measurement.
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Yoshihiro Miyake, Eigo Isomura, Masahiko Iyoda
2006 Volume 35 Issue 8 Pages
836-837
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Supplementary material
The iridium-catalyzed hydrosilylation of alkynes in the presence of 4,4′,5,5′-tetramethylbiphosphinine (tmbp) has been explored. The hydrosilylation of alkynes in the presence of tmbp proceeds effectively to give β-(
E)-vinylsilanes highly selectively in moderate to high yields, whereas a similar hydrosilylation in the absence of tmbp produces β-(
Z)-vinylsilanes selectively. The stereoselectivity of these reactions suggests the importance of the electron-withdrawing properties of tmbp coordinated to iridium.
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Masaki Shimizu, Katsuhiro Shimono, Tamejiro Hiyama
2006 Volume 35 Issue 8 Pages
838-839
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Supplementary material
(
Z)-1,2,3,4-Tetraboryl-2-butene reacted with three molecules of 2,3-dialkylidene-1,5-alkanediol as a single stereoisomer. Preparation and triple addition of the butene can be effected in a single operation.
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Ming-Qiang Hu, Cheng-Bing Ma, Xiao-Feng Zhang, Feng Chen, Chang-Neng C ...
2006 Volume 35 Issue 8 Pages
840-841
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Supplementary material
Model compounds of the H-cluster of the [Fe]-only hydrogenase, Fe
2{μ-S(CH
2)
3S}(CO)
5S(CH
2CH
3)
2, Fe
2{μ-S(CH
2)
3S}(CO)
5{S(CH
2CH
3)C
6H
5}·0.5THF, and Fe
2{μ-S(CH
2)
3S}(CO)
5{S(CH
2CH
3)CH
2CH
2Cl} have been synthesized and characterized by X-ray diffraction, spectroscopy, and electrochemistry. Organic thioethers were introduced by simple method as terminal S-ligation to simulate the cystine-S linkage between the 2Fe unit and cuboidal [4Fe4S] moiety.
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Takeshi Uemura, Shinya Imoto, Naoto Chatani
2006 Volume 35 Issue 8 Pages
842-843
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Supplementary material
The reaction of 2-phenylpyridines with anilines in the presence of Cu(OAc)
2 as a promoter results in selective mono-amination of the ortho C–H bonds in 2-phenylpyridines to give amine derivatives in high yields per the conversion. This is the rare example of the functionalization of C–H bonds to C–N bonds.
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Masashi Kijima, Takayuki Oda, Takahisa Yamazaki, Yasunori Tazaki, Junj ...
2006 Volume 35 Issue 8 Pages
844-845
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Poly(pyridinediylbutadiynylene)s, a conjugated polymer alternatively consisted of the pyridine and butadiyne units, were synthesized by oxidative polycondensation of diethynylpyridine with the Hay catalyst. They converted to microporous carbons in high yields with a high efficiency of fixation of nitrogen by heating up from room temperature to 900 °C under flowing of argon.
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Takamitsu Shimamoto, Tomohiro Hirano, Hiroyuki Nishimoto, Keiji Yamamo ...
2006 Volume 35 Issue 8 Pages
846-847
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Supplementary material
A palladium complex, [(η
3-C
3H
5)Pd(cod)]
+[PF
6]
− (
C), catalyzes hydrosilylation of 1-dodecene-6,11-diyne (
5) or 1-tridecene-6,11-diyne (
7), and of their 9-oxo congeners (
9 or
11), with HSiCl
3 to form regioisomeric cyclization products (
6,
8,
10, and
12, respectively), which arise between the diyne part (path a) to form
A series or between the enyne counterpart (path b) to form
B series. The formation of product
B is markedly favored with 1-tridecene-6,11-diyne derivatives as compared with 1-dodecene-6,11-diyne ones that possess a terminal alkyne.
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Tsutomu Ohzuku, Kingo Ariyoshi
2006 Volume 35 Issue 8 Pages
848-849
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Lead-free accumulators consisting of lithium aluminum manganese oxide (LAMO) and lithium titanium oxide (LTO) having spinel-framework structures are examined in 1 M LiBF
4 acetonitrile. Results on zero-volt storage for 2 weeks, cycle tests at 1 mA cm
−2 in voltages of 0 to 2.9 V for 20 cycles and then at 2 mA cm
−2 in voltages of 2.0 to 2.9 V for 100 cycles, and rate-capability tests ranging from 0.3 to 16.7 mA cm
−2 are presented and 12 V lead-free accumulators, in which 5 cells are connected in series, are proposed for renewable and clean energy technologies.
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Wenjing Lou, Miao Chen, Xiaobo Wang, Yanan Zhang, Weimin Liu
2006 Volume 35 Issue 8 Pages
850-851
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A facile and versatile method characterized by thermolysis of metal dialkyl dithiophosphates in porous anodic alumina templates was proposed for producing semiconductor metal sulfide nanowires. Highly crystalline nanowires of binary metal sulfide ME (M = Cd, Pb, or Zn) have been prepared and characterized by X-ray diffraction and electron microscopy (SAED, SEM, and TEM).
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Yasumasa Kanekiyo, Hiroaki Tao
2006 Volume 35 Issue 8 Pages
852-853
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Supplementary material
A novel sensing system for glucose-specific detection has been established based on a combination of a boronic acid and enzymes. To overcome the inherently low biding affinity of glucose toward boronic acids, glucose is converted into gluconic acid by the enzymatic reaction using glucose oxidase (GOx), and then complexed with a fluorescent boronic acid through the α-hydroxycarboxylate moiety. According to the present strategy, glucose concentration is exclusively determined among other saccharides in aqueous solutions.
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Kanako Honda, Yasuro Niidome, Naotoshi Nakashima, Hirofumi Kawazumi, S ...
2006 Volume 35 Issue 8 Pages
854-855
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Supplementary material
Phosphatidylcholine-passivated gold nanorods (NRs) adsorbed on polyanion-modified glass substrates. The NRs on glass substrates formed end-to-end assemblies showing red-shifted and broaden longitudinal surface plasmon (SP) bands. Addition of aminohexanethiol (AHT) induced dumping of SP bands but increased the density of NRs on glass surfaces. Thiol groups of AHT were effective to change the properties of NR assemblies on glass surfaces.
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Atsushi Nakahira, Toshihiro Okajima, Tetsuo Honma, Satoshi Yoshioka, I ...
2006 Volume 35 Issue 8 Pages
856-857
Published: 2006
Released on J-STAGE: August 05, 2006
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The removal of arsenic in geothermal water was carried out by using hydroxyapatite-based materials including the industrial waste, such as bovine bone and hydroxyapatite modified by a solid solution with SiO
2 (SiAp). The existence of arsenic in hydroxyapatite was examined by XANES measurements. The use of these hydroxyapatite-based materials results in a significantly lower environmental loading approach in order to purify arsenic contamination of drinking well waters.
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Yutaka Matsuo, Akihiko Iwashita, Eiichi Nakamura
2006 Volume 35 Issue 8 Pages
858-859
Published: 2006
Released on J-STAGE: July 01, 2006
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Heating of C
60Me
5Br in toluene in the presence of an iridium catalyst and triethylamine results in benzylation of the fullerene core to yield C
60Me
5CH
2C
6H
5. The reaction is general for various alkylarenes, and probably takes place via iridium-catalyzed activation of a benzylic C–H bond.
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Pallavi Shah, Arumugamangalam V. Ramaswamy, Veda Ramaswamy
2006 Volume 35 Issue 8 Pages
860-861
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Well-ordered Sn
4+-incorporated mesoporous silica SBA-15 samples have been synthesized from tetraethyl orthosilicate (TEOS) and SnCl
4 (Si/Sn = 114–15) using nonionic surfactants under a slightly higher pH medium (optimum H
2O to HCl molar ratio) and characterized by XRD (an increase in lattice parameter), TEM (no SnO
2 species) and UV–vis spectral (absorption at 211 nm) techniques to show that Sn
4+ ions are in tetrahedral coordination in Sn–SBA-15.
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Kei Goto, Keiichi Shimada, Shunsuke Furukawa, Shinji Miyasaka, Yusuke ...
2006 Volume 35 Issue 8 Pages
862-863
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Alkaline hydrolysis of a thionitrate and a sulfenyl bromide bearing a bowl-type steric protection group produced a stable sulfenic acid. This provides a conclusive demonstration of these elementary processes. It was shown that a very efficient steric protection group is necessary to prevent the condensation of the sulfenate anion generated during the hydrolysis.
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Hongwei Yan, Yingling Yang, Zhengping Fu, Beifang Yang, Linsheng Xia, ...
2006 Volume 35 Issue 8 Pages
864-865
Published: 2006
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The fabrication of ordered porous titania films using polystyrene colloidal crystal templates by cathodic electrodeposition is reported. A new strategy using Ti(SO
4)
2 as Ti source for the potentiostatic electrodeposition of titania has been developed. An improved post-treatment of the electrodeposited samples was executed to obtain long-range ordered porous films.
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Takaaki Itai, Harue Masuda, Yoshio Takahashi, Muneki Mitamura, Minoru ...
2006 Volume 35 Issue 8 Pages
866-867
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In this study, we applied X-ray absorption near-edge structure spectroscopy (XANES) to the determination of the As
III/As
V ratios in sediments in the Bengal Basin, where groundwater contamination of As causes serious health hazard. The depth profile of oxidation state of As in sediment shows that As
III is dominant species in the depth where As concentration of groundwater is high. This result is consistent with the general understanding about mobility of inorganic As species in various field observations.
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Manikandan Kadirvel, Elena V. Bichenkova, Antony D’Emanuele, Sal ...
2006 Volume 35 Issue 8 Pages
868-869
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2-
O-
tert-Butyldimethylsilyl-4,6-bispyrenoyl-
myo-inositol-1,3,5-orthoformate (
1) and 2-
O-
tert-butyldimethylsilyl-4-[(4-dimethylamino)benzoyl]-6-pyrenoyl-
myo-inositol-1,3,5-orthoacetate (
2) adopt unstable chair conformations with five substituents axial, in which the aromatic esters participate in π-stacking, and give excimer and exciplex fluorescence, respectively. Upon addition of acid, the orthoformate/orthoacetate lock is cleaved, which allows the inositol ring to switch to the more stable penta-equatorial chair conformation, with loss of exciplex/excimer fluorescence.
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Kenji Hara, Keiji Iwahashi, Yoshikazu Kanamori, Satoshi Naito, Satoru ...
2006 Volume 35 Issue 8 Pages
870-871
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A dimeric
N-heterocyclic carbene (NHC)–rhodium(I) complex connected with a long chain dialkyl disulfide linker was synthesized, and used for the preparation of a Rh-modified alkane thiolate monolayer on a gold surface.
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Jong Hwa Jung, Eun Jin Cho, Jeung Ku Kang
2006 Volume 35 Issue 8 Pages
872-873
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Supplementary material
The rod-like silica structure was obtained by inner sol–gel polymerization of BTEB using the organic tube
1 as a template, and its gas-absorption property was characterized. The organic silica rod-like material absorbed 0.68 wt % of hydrogen at 78 K.
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Atsushi Nakahira, Takayuki Murakami, Mitsuhiko Ohta, Tetsuo Honma, Tak ...
2006 Volume 35 Issue 8 Pages
874-875
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12Ce–ZrO
2 (containing 12 mol %CeO
2)-based composites with the addition of 3Y–ZrO
2 (containing 3 mol %Y
2O
3) were fabricated by the sintering at 1400 °C and post-HIP treatment at 1350 °C. These composites possessed the high strength and fracture toughness. Their local structures of Ce-K, Y-K, and Zr-K edges for these 12Ce–ZrO
2/3Y–ZrO
2 composites were examined by XAFS measurements.
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Yukihiro Motoyama, Mikihiro Takasaki, Kenji Higashi, Seong-Ho Yoon, Is ...
2006 Volume 35 Issue 8 Pages
876-877
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Supplementary material
Facile synthesis of ruthenium nanoparticles supported on the carbon nanofibers (CNFs) is accomplished by thermal decomposition of Ru
3(CO)
12; ruthenium species on the platelet-type CNF are dispersed homogeneously and selectively on the edge of the graphite layers with narrow size distributions and behaves as an excellent catalyst for arene hydrogenation.
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Maohua Dai, Dingliang Tang, Zhijie Lin, Hongwei Yang, Youzhu Yuan
2006 Volume 35 Issue 8 Pages
878-879
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The amorphous Ti–Si mixed oxides prepared from chloride precursors using a one-step nonhydrolytic sol–gel route could serve as efficient gold catalyst supports for gas-phase epoxidation of propylene in O
2 and H
2. A propylene conversion of 6.8% at the initial 60 min and 4.0% after 4 h of time-on-steam, keeping a selectivity to propylene oxide as high as 95%, was obtained over the gold supported on a Ti–Si mixed oxide containing 10 mol % of Ti.
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Shigeyuki Muto, Yuya Oaki, Hiroaki Imai
2006 Volume 35 Issue 8 Pages
880-881
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Supplementary material
Various kinds of organic dye molecules were successfully incorporated into silica–surfactant nanoparticles with a hexagonally ordered mesostructure. The dye-incorporated composite particles, which had a diameter of ca. 30 nm, exhibited specific fluorescent properties and pH sensitivity derived from the organic molecules.
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Masakatsu Matsumoto, Yusuke Sano, Nobuko Watanabe, Hisako K. Ijuin
2006 Volume 35 Issue 8 Pages
882-883
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Singlet oxygen added smoothly to
N-acyl-5-aryl-4-
tert-butyl-3,3-dimethyl-2,3-dihydropyrroles
1 to give the corresponding bicyclic dioxetanes fused with
N-acylpyrrolidine
2, which possessed marked thermal stability.
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Deliang Wang, Xinyu Zhang, Kunjie Wu, Shuhua Xu
2006 Volume 35 Issue 8 Pages
884-885
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Unpolarized infrared spectroscopic study was carried out on thin nanocrystalline anatase TiO
2 films with grain size of ≈20 nm. The transverse optical lattice vibration frequencies are the same as that of single-crystal anatase. The longitudinal optical modes can be detected with an oblique unpolariation at incident angles ≥50°. The broad LO absorption peak is a combination of the A
2u LO and the E
u LO modes’ resonant response to the infrared radiation.
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Chan-Woo Park, Jaekook Kim
2006 Volume 35 Issue 8 Pages
886-887
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Li[Cr
0.290Li
0.240Mn
0.470]O
2 with nanocomposite structures was synthesized by a solution method with subsequent quenching. The crystalline structure was investigated by X-ray diffraction (Rietveld refinement), electron diffraction, and HRTEM. According to coindexed electron diffraction patterns and HRTEM images, Li[Cr
0.290Li
0.240Mn
0.470]O
2 was found to be nanocomposite powders indexed in monoclinic and hexagonal structures. The nanocomposite cathode prevented spinel-like structural transformation during cycling and delivered a good reversible capacity of about 195 mA h/g.
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Tsuneyuki Nakamura, Naoto Ando, Yukino Matsumoto, Shunsuke Furuse, Mas ...
2006 Volume 35 Issue 8 Pages
888-889
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Adiabatic electron affinities (
EAa’s) of seven oligophenyls: biphenyl (BP), 4-cyanobiphenyl (CNBP),
o-terphenyl (
o-TP),
m-terphenyl (
m-TP),
p-terphenyl (
p-TP),
p-quaterphenyl (
p-QP), and 1,3,5-triphenylbenzene (TPB), have been evaluated by anion photoelectron spectroscopy and density functional theory calculations. The result provides the direct determination of the
EAa values of the isolated CNBP,
p-TP,
p-QP, and TPB molecules, while
EAa of BP,
o-TP, and
m-TP were estimated from the extrapolation of
EAa vs cluster size. The excellent agreement between the experimental and calculated
EAa were obtained.
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Zhiping Zhu, Yi Zhou, Hongwen Yu, Tomoko Nomura, Bunshi Fugetsu
2006 Volume 35 Issue 8 Pages
890-891
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We report on the first use of MWCNT/nanotubular-TiO
2 (multiwalled carbon nanotube, MWCNT; TiO
2-derived nanotube, nanotubular-TiO
2) composites as catalysts for photodegradation of aquatic humic substances (HSs). The MWCNT was demonstrated to be capable of enhancing the activity of the photocatalyst. The best degradation efficiency was obtained by using MWCNT/nanotubular-TiO
2 composites having 20% MWCNTs as the photocatalyst.
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Kaori Narimatsu, Junichi Nishioka, Hiroto Murakami, Naotoshi Nakashima
2006 Volume 35 Issue 8 Pages
892-893
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We describe the design of new carbon nanotube (CNT) solubilizers based on a novel concept, that is, “reactive carbon nanotube solubilizers” that are compounds carrying a reactive moiety for the introduction of the desired functional groups.
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Kailu Yu, Guoling Ruan, Yuheng Ben, Jijun Zou
2006 Volume 35 Issue 8 Pages
894-895
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La-doped carbon nanotubes and valuable C
2 hydrocarbon (C
2H
2 and C
2H
4) are simultaneously generated in CH
4/H
2 corona discharge. The analysis of off gas indicates that the addition of anodic alumina membrane shows no influence on plasma methane conversion reactions.
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Suk-Won Choi, Kaoru Fukuda, Shoichiro Nakahara, Keiki Kishikawa, Yoich ...
2006 Volume 35 Issue 8 Pages
896-897
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The helical pitch of a chiral nematic (cholesteric: Ch) liquid crystal (LC) became shorter if an achiral compound
1 was added to a chiral host. This unusual behavior characteristic to ester compounds can be explained by the ability of the ester compound
1 to form non-planar conformations.
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Xuebing Li, Yankuan Liu, Tanwei Li, Zude Zhang
2006 Volume 35 Issue 8 Pages
898-899
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Supplementary material
One-dimensional nanorutile crystals have been synthesized by interfacially initiating redox reaction between titanium trichloride (TiCl
3) and benzoyl peroxide (BPO) in a hydrothermal way at a relatively low temperature. It not only produced a large quantity of rutile nanorods but also provided a novel method to synthesize 1D nanomaterials at low temperature.
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Kenji Matsuda, Satoshi Yokojima, Yoshihisa Moriyama, Shinichiro Nakamu ...
2006 Volume 35 Issue 8 Pages
900-901
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Supplementary material
The ESR spectrum of a diarylethene was measured during electrochemical oxidative ring-opening reaction of the closed-ring isomer. The spectrum was simulated by UB3LYP/cc-pVTZ method to reveal that the spectrum contains the cation radicals of both the open- and closed-ring isomers. By comparing the calculated spectrum with the experimental one, the ratio between the cation radical of the open- and the closed-ring isomers was determined to be 4:1.
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Yousuke Ooyama, Yutaka Harima
2006 Volume 35 Issue 8 Pages
902-903
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Supplementary material
Structural isomers of novel benzofuro[2,3-
c]oxazolocarbazole-type fluorophores have been synthesized and their photophysical properties in solution and in the solid state were investigated; remarkable differences in the absorption and fluorescence spectra were observed between structural isomers in both states, and a drastic solid-state fluorescence enhancement was found to be caused by N-alkylation of fluorophores.
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Masato Takeuchi, Takashi Yamasaki, Koichiro Tsujimaru, Masakazu Anpo
2006 Volume 35 Issue 8 Pages
904-905
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Crystalline TiO
2 thin films were successfully prepared on thermally unstable polycarbonate substrates without any inorganic or organic binders at low temperature (ca. 353 K) by a RF-magnetron sputtering deposition method. The anatase structure of TiO
2 could be confirmed by XRD measurements. These thin films showed high transparency and mechanical stability and were not susceptible to peeling by scratching or bending. These TiO
2 thin films prepared on polycarbonate substrates also exhibited photoinduced superhydrophilicity under UV light irradiation.
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Tsuyoshi Kugita, Hiroyuki Higuchi
2006 Volume 35 Issue 8 Pages
906-907
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Supplementary material
The Si–H bond was introduced onto the surface of MCM-41 by reduction of the butoxylated MCM-41. The hexyl and phenylalkyl-functionalized MCM-41s were obtained by reaction of the Si–H introduced MCM-41 with 1-hexene or styrene.
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Katsumi Yamada, Yu Kimura, Syoichi Suzuki, Junji Sone, Jun Chen, Shige ...
2006 Volume 35 Issue 8 Pages
908-909
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An aqueous solution, acting as a photoinduced electron-transfer system, was prepared using tris(2,2′-bipyridyl)ruthenium complex, methylviologen, and pyrrole to demonstrate the multiphoton-sensitized polymerization of pyrrole. A conductive polypyrrole (2.7 × 10
−2 S cm
−1 in free standing state) was obtained on a glass substrate by illumination at 800 nm using a femtosecond pulses laser. The excitation of the ruthenium complex was entailed by two-photon absorption because the ruthenium complex did not have any absorption around 800 nm.
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Hangning Chen, Rong Li, Huanling Wang, Liang Yin, Fushan Wang, Jiantai ...
2006 Volume 35 Issue 8 Pages
910-911
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Using methanol as the reaction medium (an appropriate amount of sodium bromide was directly added to it), the highly efficient enantio-selective hydrogenation of methyl acetoace-tate (MAA) was achieved over a tartaric acid-modified Raney nickel catalyst. 85% ee was attained under the comparatively mild conditions (0.6 MPa, 60 °C, 1 h).
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Hiroyuki Nishikawa, Hiromichi Sekiya, Akira Fujiwara, Takeshi Kodama, ...
2006 Volume 35 Issue 8 Pages
912-913
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Supplementary material
The transport properties of (MeDH-TTP)
2AsF
6, which crystallized in the κ-type structure, were investigated and found to be semiconductive with a small activation energy. ESR measurements suggested that the insulating state below 40 K should be antiferromagnetic, similarly to the Mott transition system represented by quasi-two-dimensional κ-ET [ET = bis(ethylenedithio)tetrathiafulvalene] salts.
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Yingpu Bi, Gongxuan Lu
2006 Volume 35 Issue 8 Pages
914-915
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Two-dimensionally (2-D) networked gold nanowires have been prepared by a simple chemical reduction method using glycerol as capping agents. It was found that 2-D gold nanowires were more active than spherical gold nanoparticles on hydrogen generation from sodium borohydride solution.
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Teruaki Mukaiyama, Hitoshi Nagao, Yoshinobu Yamane
2006 Volume 35 Issue 8 Pages
916-917
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Diastereo- and enantio-selective synthesis of 3,4-dihydropyran-2-ones from various silyl enolates and α,β-unsaturated ketones were successfully carried out by using cinchonidine-derived quaternary ammonium phenoxide. In this reaction, a synthesis of the two enantiomers was achieved by an appropriate choice of a substituent on the bridgehead nitrogen of cinchonidine.
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Takahito Itoh, Kyoko Tachino, Takahiro Uno, Masataka Kubo, Norimitsu T ...
2006 Volume 35 Issue 8 Pages
918-919
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Supplementary material
Topochemically controlled [2 + 2] photocycloaddition took place at the quinoid double bond of the 7-bromoethoxycarbonyl-7-cyano-1,4-benzoquinone methide (
1) to afford its cyclobutane dimer.
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Michio Goichi, Hiroaki Miyahara, Shinji Toyota
2006 Volume 35 Issue 8 Pages
920-921
Published: 2006
Released on J-STAGE: July 15, 2006
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Two 1,8-anthrylene cyclic trimers with acetylene or diacetylene linkers were synthesized by macrocyclization with the Eglinton coupling. These compounds have nonplanar and strained cyclic structures with significant bending deformations of acetylene carbons as revealed by X-ray analysis and DFT calculation. The effects of the molecular structures on the
13C NMR chemical shifts and the electronic spectra are discussed.
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Junichi Isoe, Emiko Kaneko
2006 Volume 35 Issue 8 Pages
922-923
Published: 2006
Released on J-STAGE: July 15, 2006
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A new sensitive spectrophotometric method for human serum albumin (HSA), the main protein in urine, has been developed using Erythrosin B. The proposed method is not based on conventional spectral shift but on an enhanced absorbance of the protein–bound dye and suppression of reagent blank in the presence of Triton X-100. The detection limit for HSA is 0.06 mg L
−1 (S/N = 3), which is superior to conventional methods by a factor of 50–100. This is the first ever spectrophotometric method applicable for urinary protein even in healthy subjects.
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Tomoki Yoshida, Misako Aida
2006 Volume 35 Issue 8 Pages
924-925
Published: 2006
Released on J-STAGE: July 15, 2006
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Supplementary material
We investigate the relative stabilities of tautomers of 8-oxoguanine (8OG) and guanine (G) comprehensively at various levels of theory up to MP4 and CCSD(T) in the gas phase. We find that the population of the enol form at C6 position in 8OG is higher than that in G at any level of theory which we used. This may partly account for the high mutagenicity of 8OG.
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Hisahiro Hagiwara, Sachiyo Inotsume, Masakazu Fukushima, Takashi Hoshi ...
2006 Volume 35 Issue 8 Pages
926-927
Published: 2006
Released on J-STAGE: July 15, 2006
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Michael addition of a 1,3-dicarbonyl compound to an α,β-unsaturated carbonyl compound was effectively catalyzed by heterogeneous
N,
N-diethylaminopropylated silica gel (NDEAP) in water under microwave heating. The reaction condition was mild, practical, and environmentally benign. The sustainable nature of the catalyst was exemplified by re-use up to 5 times.
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