bluuebunny/crossref_metadata_2025_split huggingface dataset:
On the Unusual Conformation of Calix[4]arene Which Appears in the Tricarbonylchromium Complexes
Authors: Iki Hideshi , Kikuchi Taketoshi , Tsuzuki Hirohisa , Shinkai Seiji 
Published: April 2006

Abstract
The structures of arene-tricarbonylchromium complexes prepared from cone-25,26,27,28-tetrapropoxycalix[4]arene and Cr(CO)6 were studied by an X-ray crystallographic method: they showed an unusual conformation with a pair of faced gable-like roofs, which is extraordinarily transformed from a cone conformation.
Photomechanical Effect in Monolayers of Azobenzene Side Chain Polymers
Authors: Seki Takahiro , Tamaki Takashi 
Published: April 2006

Abstract
Expansionshrinkage behaviors of photoresponsive monolayers at the air/water interface are investigated using azobenzene side chain polymers. Influence of the spacer length implies that the photomechanical effect in the present systems is attributed to the reversible on/off contact of the azobenzene side unit with the water surface.
A Photoelectrochemical Fixation of Carbon Dioxide. Spontaneous Up Quality Conversion of Organic Compound
Authors: Ueda Jo-ji , Nakabayashi Seiichiro , Ushizaki Jun-ichi , Uosaki Kohei 
Published: April 2006

Abstract
A photosynthetic semiconductor electrochemical cell with Mg electrode as a sacrificial anode was assembled. This photoelectrochemical cell spontaneously fixes carbon dioxide into organic molecule such as benzyl chloride to form phenyl acetic acid which costs 7.5 times more than the sources. Among the semiconductor electrodes investigated, p-GaP showed highest current efficiency, 47%.
Novel Synthesis of Perfluoroalkylated Phenylboronic Acid with Low pKa Using Bis(heptafluorobutyryl)peroxide as Perfluoroalkylation Reagent
Authors: Shiino Daijiro , Kim Yong Joo , Murata Yoshishige , Yamaguchi Masahiko , Kataoka Kazunori , Koyama Yoshiyuki , Yokoyama Masayuki , Okano Teruo , Sakurai Yasuhisa 
Published: April 2006

Abstract
3-Acetamido-6-heptafluoropropylphenylboronic acid was synthesized by the perfluoroalkylation of 3-acetamidophenylboronic acid (pKa = 8.3) with bis(heptafluorobutyryl)peroxide. The perfluoroalkylated phenylboronic acid thus prepared was determined to have a low pKa as 6.6 by potentiometric titration. Lowered pKa suggests that the product has an advantage for binding with polyols under physiological pH, opening a wide application in the field of biological as well as material sciences.
An Unusual Self-Assembly of 2-Thiouracil Derivative. Synthesis and Crystal Structure of Bis(ethane-1,2-diamine)[5-((1′H)-4′-oxo-6′-aminopyrimidin-2′-yl)thio]-6-amino-2-thiouracilatocobalt(III) Perchlorate
Authors: Yamanari Kazuaki , Kida Makiko , Yamamoto Masahiro , Fujihara Takashi , Fuyuhiro Akira , Kaizaki Sumio 
Published: April 2006

Abstract
An unusual red complex [Co(di-Hatuc)(en)2]+ (di-Hatuc = [5-((1′H)-4′-oxo-6′-aminopyrimidin-2′-yl)thio]-6-amino-2-thiouracilate (2−); en = ethane-1,2-diamine) is formed by a simple thermal reaction. This complex has both a intramolecular hydrogen bond and novel linear intermolecular hydrogen bonds, the latter being analogous to hydrogen bonding in nucleic acids.
Liquid Phase Formation of Spinel Surface Layers on Hexaaluminate Microcrystals
Authors: Machida Masato , Murakami Manabu , Sato Akihiro , Kijima Tsuyoshi , Arai Hiromichi 
Published: April 2006

Abstract
Spinel oxide (Mn3O4) surface layers were produced on hexaaluminate microcrystals by means of the air-oxidation process. The surface layer completely covered the basal plane of hexagonal facets as evident from HREM observation and CO2 chemisorption measurement. The catalytic activity for methane oxidation was strongly enhanced by this modification.
Total Synthesis of Aureobasidin A, an Antifungal Cyclic Depsipeptide
Authors: Kurome Toru , Inami Kaoru , Inoue Tetsuya , Ikai Katsushige , Takesako Kazutoh , Kato Ikunoshin , Shiba Tetsuo 
Published: April 2006

Abstract
A total synthesis of an antifungal cyclic depsipeptide aureobasidin A was first achieved mainly using PyBroP1) as a coupling reagent. The synthetic cyclized product was completely identical with the natural antibiotic in all respects. Some unexpected reactions due to N-methylamino acid were also described.
Solution Structure of a Peptide Designed on Plastocyanin Metal Center in Trifluoroethanol and Incorporation of Cobalt(II) into the Peptide
Authors: Zaima Hiroaki , Ueyama Norikazu , Nakamura Akira , Aimoto Saburo 
Published: April 2006

Abstract
A novel sixteen amino acid peptide which has a portion of the conserved amino acid sequence of potato plastocyanin was synthesized. Its solution structure in trifluoroethanol (TFE) was determined by 1H NMR spectroscopy. Incorporation of cobalt(II) ion into the peptide having a turn structure was examined. Cys6, His9, and Met14 of the peptide in TFE are located close to each other and suitable to bind a metal ion. Incorporation of Co(II) ion to the peptide results in formation of tetrahedral coordination site.
Continuous Removal of SO2 in the Model Flue Gas over PAN-ACF with Recovering Aqueous H2SO4
Authors: Kisamori Seiki , Kawano Shizuo , Mochida Isao 
Published: April 2006

Abstract
SO2 was adsorbed, oxidized, hydrated, and recovered continuously as aq. H2SO4 at 30–100 °C on a polyacrylonitrile based active carbon fiber (PAN-ACF-FE-300). SO2 of 1000 ppm in a model flue gas was removed completely for longer than 60 h at 30 and 50 °C by W/F = 5.0 × 10−3 g min ml−1 by supplying sufficient humidity of 10 and 20 vol%, respectively. The heat-treatment of the ACF at 800 °C was found very effective to enhance the catalytic activity.
A Facile and Highly Regioselective Conversion of Epoxides to Bromohydrins Using Tetrabutylammonium Bromide and Magnesium Nitrate
Authors: Suh Young-Ger , Koo Bon-Am , Ko Jung-Ae , Cho Youn-Sang 
Published: April 2006

Abstract
Reaction of epoxides with nBu4NBr in the presence of Mg(NO3)2 as a catalyst affords vicinal bromohydrins in excellent yields via regioselective ring opening of the unsymmetrical epoxides.
An Improved Synthetic Method for Both Enantiomers of Tricyclo[5.2.1.02,6]deca-4,8-dien-3-one by Means of Chemoenzymatic Dissymmetrization of a meso-Compound
Authors: Sato Masayuki , Hattori Hanae , Murakami Masayuki , Kaneko Chikara 
Published: April 2006

Abstract
Diels-Alder reaction of cis-1,4-diacetoxy-2-cyclopentene with cyclopentadiene gave a tricyclo[5.2.1.02,6]decene derivative stereoselectiviely. The titled dienone useful for enantioselective synthesis of cyclopentanoids and other natural products has been efficiently prepared from the adduct by means of dissymmetrization with lipase-catalyzed acetylation.
Production and Immunological Characterization for Anti Hemin Monoclonal Antibody
Authors: Uda Taizo , Okawa Yumi , Umenobu Takako , Hifumi Emi , Ogino Keiki 
Published: April 2006

Abstract
By using three kinds of antigens for immunization, screening and confirmation, a monoclonal antibody for hemin was produced. The probability of the antibody secreting fused cells was extremely low compared with the normal cell fusion. The antibody could also react some other metal substituted protoporphyrins such as Mn, Pd, Zn and Ga instead of Fe. The monoclonal antibody may loosely recognize the porphyrin ring unlike hemoglobin.
The Role of Oxygen in the Reduction of NO with Propene over Rh/Al2O3 in Oxidizing Atmosphere
Authors: Naito Shuichi , Tanimoto Mitsutoshi 
Published: April 2006

Abstract
Infrared spectroscopy and isotopic tracer technique with microwave spectroscopy revealed a marked change of reaction intermediates as well as reaction mechanisms by the presence of excess oxygen in NO-propene reaction over highly dispersed Rh/Al2O3 catalyst.
Catalytic Synthesis of β-D-Ribofuranosides from D-Ribofuranose and Alcohols
Authors: Shimomura Naoyuki , Mukaiyama Teruaki 
Published: April 2006

Abstract
Catalytic synthesis of β-D-ribofuranosides from C-1 free ribofuranose, 2,3,5-tri-O-benzyl-D-ribofuranose, and alcohols is efficiently performed by combined use of silver salts and Lawesson’s reagent, [2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide], or silver salts and diphenyltin sulfide (Ph2Sn=S) under mild conditions.
Electrochemical Oxidation of Hydrosilanes. A Synthetic Approach to Halosilanes and Disilanes
Authors: Kunai Atsutaka , Kawakami Toshihiro , Toyoda Eiji , Sakurai Tomohiro , Ishikawa Mitsuo 
Published: April 2006

Abstract
Electrolytic oxidation of dimethylphenylsilane (1) in the presence of CuCl2 or CuCl afforded chlorodimethylphenylsilane in high yields ( &gt;90%), while similar electrolysis of 1 in the presence of BF4− ions afforded fluorodimethylphenylsilane in 90% yield. 1,2-Diphenyltetramethyldisilane was obtained from 1 in 48% yield by the electrolysis with a Pt–Cu electrode system. A “paired” electrolysis of methyldiphenylsilane on the anode and chloromethyldiphenylsilane on the cathode afforded 1,2-dimethyltetraphenyldisilane in 64% yield.
Synthesis and Aggregate Morphology of Protoporphyrin IX Derivative Having Phospholipid Residue
Authors: Komatsu Teruyuki , Arai Kenji , Nishide Hiroyuki , Tsuchida Eishun 
Published: April 2006

Abstract
A protoporphyrin IX derivative having a phospholipid residue (lipid-porphyrin) was synthesized. The lipid-porphyrin itself formed an oval multilamellar vesicle in an aqueous medium. The spectral features of the lipid-porphyrin vesicle indicated a stacked configuration of the porphyrin moiety.
Transformation of C≡C Triple Bond of Poly(aryleneethynylene) Type Polymers to C=C Double Bond
Authors: Yamamoto Takakazu 
Published: April 2006

Abstract
C≡C triple bond of poly(aryleneethynylene) type polymer is converted to C=C double bond by the reaction with HBr, and the =C–Br group thus formed is further transformed to an ester group.
Photochemical Micropatterning of Silylated Glass Surface Bearing 3-Phenyldithiopropyl Group by KrF Laser Irradiation
Authors: Ichinose Nobuyuki , Sugimura Hiroyuki , Uchida Tatsuya , Shimo Nobuo , Masuhara Hiroshi 
Published: April 2006

Abstract
Thin film of 3-phenyldithiopropyltrimethoxysilane (1) was prepared as a photoreactive surface of masked thiol by in-situ reaction of 3-mercaptopropyltrimethoxysilane (2) with diphenyldisulfide before deposition of the film on quartz substrate. The film of 1 undergoes photochemical oxygenation of sulfur atom more efficiently than that of 2 upon KrF laser (248 nm) irradiation, where a thiyl radical is incorporated as a common intermediate.
Hydrogenolysis of gem-Diphenylcyclopropanes Fused with Trihalogenated Quinones
Authors: Oshima Takumi , Nakajima Yu-ichi , Nagai Toshikazu 
Published: April 2006

Abstract
Palladium-catalyzed hydrogenolysis of gem-diphenylcyclopropanes fused with trihalogenobenzoquinones gave diphenylmethylhydroquinones. Water took part in the reaction to yield α-hydroxydiphenylmethyl- and benzoylhydroquinones. The selective ring-cleavage was interpreted in terms of the π-conjugative interaction of cyclopropane.
Direct Electrochemistry of Copper-Containing Nitrite Reductase from Achromobacter xylosoxidans NCIB 11015
Authors: Kohzuma Takamitsu , Shidara Sohsuke , Yamaguchi Kazuya , Nakamura Nobuhumi , Deligeer  , Suzuki Shinnichiro 
Published: April 2006

Abstract
Nitrite reductase containing type I and type II coppers from Achromobacter xylosoxidans NCIB 11015 shows the direct electrochemical response corresponding to the type I copper site at a di-(4-pyridyl) disulfide (4-pyds) modified gold electrode.
Ionic Conductivity of β-Fe2(SO4)3 Type Li3Cr2(PO4)3 Based Electrolyte
Authors: Aono Hiromichi , Sugimoto Eisuke , Sadaoka Yoshihiko , Imanaka Nobuhito , Adachi Gin-ya 
Published: April 2006

Abstract
The electrical properties were studied for the (1-y)Li3Cr2(PO4)3-yLi5Mg2(PO4)3 system. The Mg2+ ion can not replace the Cr3+ site. The crystal structure for Li3Cr2(PO4)3 in this system is the β-Fe2(SO4)3 type monoclinic phase. The conductivity and the sinterability improve with the increase in y for the phosphate system. The maximum conductivity was 4.6 × 10−5 S·cm−1 at 298 K for y = 0.2. The activation energy for a Li+ ion migration at the bulk component was ca. 0.43 eV for all the samples.
Simultaneous Determination of Cysteine and Glutathione via Use of Time-Resolved Luminol Chemiluminescence Method
Authors: Kamidate Tamio , Kuniya Isao , Watanabe Hiroto 
Published: April 2006

Abstract
Hydrogen peroxide produced successively from the copper(II)-catalyzed oxidation of both cysteine (CySH) and glutathione (GSH) was detected using arthromyces ramosus peroxidase (ARP)-catalyzed luminol chemiluminescence (CL) reaction. Two peaks appeared in the CL responce curve. The former peak was due to CySH while that of the latter to GSH. The time-resolved luminol CL signals were applied for the simultaneous determination of CySH and GSH.
Novel Metal Substitution Reactions in Amidate-Bridged Binuclear Complexes [M2(bpy)2(3,3-DMGI)2]2+ (M = Pt(II), Pd(II); bpy = 2,2′-bipyridine; 3,3-DMGI = 3,3-dimethylglutarimidate)
Authors: Matsumoto Kazuko , Urata Hiroshi 
Published: April 2006

Abstract
The reaction of [Pt2(bpy)2(3,3-DMGI)2]2+ with Pd(bpy)Cl2 produces [PtPd(bpy)2(3,3-DMGI)2]2+. The same compound is obtained also from the reaction of [Pd2(bpy)2(3,3-DMGI)2]2+ with Pt(bpy)Cl2. The crystal structures of these complexes are reported.
Hole Burning Spectrum of the Vinoxy Radical in the B(2A″) State in a Supersonic Free Jet
Authors: Gejo Tatsuo , Takayanagi Masao , Kono Takumi , Hanazaki Ichiro 
Published: April 2006

Abstract
The vibronic structure of the vinoxy radical in the state was investigated by the hole burning technique in a supersonic free jet. Frequencies of the vibronic bands were determined accurately up to 4000 cm−1. It is shown that most of them can be assigned to the combinations of ν4–ν9 vibrational modes, in agreement with the previous calculation.
A Novel Color-Change Indicator for Molecules. Guest-Induced Color-to-Colorless Change of p-Nitrophenol-Modified β-Cyclodextrin
Authors: Kuwabara Tetsuo , Matsushita Akiko , Nakamura Asao , Ueno Akihiko , Toda Fujio 
Published: April 2006

Abstract
p-Nitrophenol-modified β-cyclodextrin changes its color from yellow to colorless upon guest binding at pH 6.50. This system was used to detect several organic molecules with remarkable molecular recognition, and the order of the guest-induced absorption changes was parallel with the order of the binding constants.
Structure and Physical Properties of (TMEO-TTP)2Au(CN)2
Authors: Mori Takehiko , Inokuchi Hiroo , Misaki Yohji , Nishikawa Hiroyuki , Yamabe Tokio , Mori Hatsumi , Tanaka Shoji 
Published: April 2006

Abstract
Radical cation salts of TMEO-TTP with linear and octahedral anions exhibit metallic conductivity down to 0.6 K. The title salt has two-dimensional donor arrangement, and the measurements of electrical conductivity, thermoelectric power, and ESR show a characteristic metal-to-metal transition.
Stereoselective Reduction in the Biotransformation of Androstane Derivatives by Cell Suspension Cultures of Marchantia Polymorpha
Authors: Hamada Hiroki , Naka Shungo , Kurban Halil 
Published: April 2006

Abstract
Cell suspension cultures of Marchantia polymorpha mainly convert 1,4-androstadiene-3,17-dione to 17β-hydroxy-1,4-androstadiene-3-one and adrenosterone to 17α-hydroxy-4-androstene-3,11-dione.
Bioluminescence Activity of Coelenterazine Analogues after Incorporation into Recombinant Apoaequorin
Authors: Ohmiya Yoshihiro , Teranishi Katsunori , Akutagawa Masamoto , Ohashi Mamoru , Tsuji Frederick I 
Published: April 2006

Abstract
Of twenty-seven synthetic analogues of coelenterazine tested for bioluminescence activity with recombinant apoaequorin, eleven showed activity, but the best activity was obtained with celenterazine incorporated into wild type apoaequorin and into apoaequorin with all three cystein residues replaced by serine.
Photolysis of CpFe(CO)2SiMe2SiMe2H in the Presence of Methanol. Indirect Evidence for the Transient Formation of a Disileneiron Complex
Authors: Ueno Keiji , Seki Seiji , Ogino Hiroshi 
Published: April 2006

Abstract
Photolysis of a C6D6 solution of a hydrodisilanyliron complex Cp(OC)2FeSiMe2SiMe2H in the presence of MeOH afforded Cp(OC)FeH(SiMe2OMe)2, Cp(OC)2FeSiMe2OMe, [CpFe(CO)2]2, and MeOSiMe2H. A plausible mechanism is proposed for the reaction, in which a disileneiron complex Cp(OC)FeH(SiMe2=SiMe2) and a methoxy-bridged bis(silylene)iron complex Cp(OC)Fe{SiMe2···O(Me)···SiMe2} are formed successively as transient intermediates.
A Study of Temperature Dependence of Local Structure of Erbium(III) Bromanilate Complex by EXAFS Spectroscopy
Authors: Sudoh Susumu , Miyanaga Takafumi 
Published: April 2006

Abstract
The local structure of erbium(III) bromanilate complex was studied by the EXAFS (extended X-ray absorption fine structure) and IR spectra of some different temperatures. From the EXAFS analyses the coordination numbers and the distances between Er(III) and oxygen atoms were recognized to change as temperature changed. IR spectra showed that the frequency of Er(III)-oxygen stretching vibration was increased with temperature. The water molecules involved play important roles in the local structures of this complex.
New Organic Metals Based on BETS Compounds with MX4− Anions (BETS = bis(ethylenedithio)tetraselenafulvalene; M = Ga, Fe, In; X = Cl, Br)
Authors: Kobayashi Akiko , Udagawa Takashi , Tomita Hideto , Naito Toshio , Kobayashi Hayao 
Published: April 2006

Abstract
Crystal structures and electrical properties of BETS compounds with tetrahedral anions, MX4− (BETS = bis(ethylenedithio)tetraselenafulvalene; M = Ga, Fe, In; X = Cl, Br) were examined. Every κ-type salt is metallic below 50 K. λ-(BETS)2FeCl4, which is isomorphous to the superconductor GaCl4 salt, undergoes a sharp metal-insulator transition at 8 K.
Total Synthesis and Trehalase-Inhibitory Activity of Trehalostatin and Its Diastereoisomer
Authors: Uchida Chikara , Yamagishi Tatsuya , Ogawa Seiichiro 
Published: April 2006

Abstract
Complete synthesis of both diastereoisomeric structures, initially proposed for the trehalase inhibitor trehalostatin, and their biological assay have been carried out. The synthetic compounds were found to lack an inhibitory activity against trehalase, suggesting that the inhibitor would possess convincingly its 4′-epimeric structure later assigned for trehazolin.
Asymmetric Recognition of Hectorite Modified with Chiral Arylethylammonium
Authors: Iwai Makoto , Shoji Hiroshi , Shimazu Shogo , Uematsu Takayoshi 
Published: April 2006

Abstract
Asymmetrically modified hectorites (HTs) were prepared by the cation exchange method with (R)- and (S)-1-arylethylammonium (aryl = phenyl, p-tolyl, and 1-naphthyl). Enantioselective entrapment of 1-phenylethylamine with the modified HTs was observed. In situ X-ray diffraction measurements confirmed that the asymmetric recognition occurred in the interlayer of the modified HT.
Product Line Design with Component Commonality and Cost-Reduction Effort
Authors: Heese Hans Sebastian , Swaminathan Jayashankar M. 
Published: April 2006

Market pressure for low prices paired with customer demand for high product variety presents a considerable dilemma for many manufacturers. Industry practice and research to date suggest that approaches based on component commonality can substantially lower the costs of proliferated product lines, but at the cost of reducing product differentiation and revenues. We analyze a stylized model of a manufacturer who designs a product line consisting of two products for sale to two market segments with different valuations of quality. The manufacturer determines the component quality levels, the amount of effort to reduce production costs, and whether to use common or different components for the two products. Explicitly considering potential interdependencies between cost-reduction effort and quality decisions, we characterize environments where the optimal product line involving component commonality features products of higher quality and yields higher revenues. Counter to earlier research we show that it can be preferable to make those components common that, relative to their production cost, are attributed a higher importance by customers. Disregarding the interactions between commonality, production cost, quality, and effort decisions can lead manufacturers to offer product lines with excessive differentiation and inefficiently low quality.
News and newsworthiness: A commentary
Authors: Shoemaker Pamela J 
Published: April 2006

Abstract
This commentary argues that the concept of news is a primitive term, one whose existence is not questioned, and that assumptions about the news need to be identified and questioned. One common assumption is that news is composed of things that are newsworthy, i. e., that news and newsworthiness are essentially the same, and that the prominence with which an event is covered in the news is an indicator of newsworthiness. Shoemaker's recent research with Akiba Cohen shows that news and newsworthiness are in fact not the same. News is a social construct, a thing, a commodity, whereas newsworthiness is a cognitive construct, a mental judgment. Newsworthiness is not a good predictor of which events get into the newspaper and how they are covered. Newsworthiness is only one of a vast array of factors that influence what becomes the news and how prominently events are covered.
Eheringe für den Krieg. Die Geschichte eines faschistischen Gedächtnisorts
Authors: Terhoeven Petra 
Published: April 2006

Vorspann
Am 18. Dezember 1935 spendeten Millionen italienischer Paare ihre goldenen Trauringe für das Vaterland. Sie wollten damit ihre Verbundenheit mit dem faschistischen Regime demonstrieren, das im Krieg gegen Äthiopien stand und mit Sanktionen des Völkerbundes fertig werden musste. Petra Terhoeven fragt nach den Spuren der symbolträchtigen Spende im kollektiven Gedächtnis Italiens und kommt dabei zu überraschenden Ergebnissen: Die Erinnerung an das Eheringopfer ist häufig negativ konnotiert, zugleich aber hochgradig „entfaschisiert“, weil der Hintergrund – der verbrecherische Krieg in Äthiopien – fast ganz ausgeblendet wird.
Alte und neue Geschichtsbilder vom Widerstand und Ostkrieg. Zu Hermann Gramls Beitrag „Massenmord und Militäropposition“
Authors: Hürter Johannes , Römer Felix 
Published: April 2006

Vorspann
Die späteren Männer des 20. Juli um Henning v. Tresckow beteiligten sich im Stab der Heeresgruppe Mitte am Feldzug gegen die Sowjetunion. Wie stellten sie sich im Sommer 1941 zu den dunklen Seiten dieses rassenideologischen Vernichtungskriegs, zu den Kriegsverbrechen und Massenmorden? Die Kontroverse um diese Frage, die über das Spezialthema hinaus die Bewertung des „Unternehmens Barbarossa“ und des Widerstands gegen Hitler insgesamt berührt, geht weiter. Hermann Graml hat die Forschungsergebnisse von Johannes Hürter und Felix Römer entschieden bezweifelt (Januarheft 2006). Jetzt antworten beide ihrem Kritiker.