bluuebunny/crossref_metadata_2025_split huggingface dataset:
Photoinduced Intra- and Inter-Molecular Hydrogen-Atom Abstraction of 1-Methylanthraquinone
Authors: Hamana Tetsuya , Miki Sadao , Hamanoue Kumao 
Published: March 2006

Abstract
The intramolecular hydrogen-atom abstraction in the lowest excited singlet and triplet states of 1-methylanthraquinone yields 9-hydroxy-1,10-anthraquinone-1-methide. The lowest excited triplet state at room temperature also abstracts a hydrogen atom from ethanol yielding 1-methyl-9,10-dihydroxyanthracene.
Synthesis of a Novel Organometallic Dendrimer with a Backbone Composed of Platinum-Acetylide Units
Authors: Ohshiro Nobuaki , Takei Fumie , Onitsuka Kiyotaka , Takahashi Shigetoshi 
Published: March 2006

Abstract
Novel organometallic dendrimers containing platinum-acetylide units in the main chain have been synthesized using 1,3,5-triethynyl-2,4,6-trimethylbenzene (4) as a bridging ligand up to a nonanuclear complex (8).
One-step Synthesis of 2,11,20-N,N′,N″-Tribenzyl-2,11,20-triaza[3.3.3](2,6)pyridinophane. Reinvestigation of the Reaction of Benzylamine with 2,6-Bis(bromomethyl)pyridine
Authors: Lee Geunsu , Miyahara Yuji , Inazu Takahiko 
Published: March 2006

Abstract
The reaction of benzylamine with 2,6-bis(bromomethyl)pyridine has now been found to provide the trimeric title compound as the major product instead of the reported dimer. When the reaction was conducted in two steps, a new tetrameric pyridinophane was isolated as the major product.
Cadmium Acetate Mediated Cenversion of Selenothioic Acid S-Alkyl Esters to Selenophenes and Ketene Selenothioacetals
Authors: Murai Toshiaki , Fujii Makiko , Kanda Takahiro , Kato Shinzi 
Published: March 2006

Abstract
Selenothioic acid S-alkyl esters were treated with Et3N and Cd(OAc)2·2H2O to give symmetrically substituted selenophenes, whereas the similar reaction in the presence of alkyl halides afforded ketene selenothioacetals in moderate yields.
Ab Initio Computer Modelling of Basic Units in Zeolite Frameworks
Authors: Sato Mitsuo , Uehara Hirofumi 
Published: March 2006

Abstract
A new computer modelling system for derivation of basic units in zeolite frameworks was developed on the basis of graph theory and molecular simulation. In the first step, all the kinds of concentric clusters(CCL) were derived on the basis of graph theory, and in the second step, three dimensional models of them were constructed by means of molecular mechanics simulation. In the 2nd CCLs, all the combinations of 4- and 5-membered rings in zeolite frameworks were realized systematically.
Formation of Organogels by Intermolecular Hydrogen Bonding between Ureylene Segment
Authors: Hanabusa Kenji , Shimura Kouji , Hirose Kazunori , Kimura Mutsumi , Shirai Hirofusa 
Published: March 2006

Abstract
Low-molecular weight compounds having ureylene segment was able to cause physical gelation in organic solvents. The main driving force for gelation was intermolecular hydrogen bonding between ureylene units.
Optical Resolution of Planar-Chiral Cyclopentadienyl-Rhodium and -Iron Complexes by Liquid Chromatography Using Aqueous β-Cyclodextrin
Authors: Morimoto Yasushi , Ando Katsuhiro , Uno Mitsunari , Takahashi Shigetoshi 
Published: March 2006

Abstract
Racemates of planar-chiral cyclopentadienyl-rhodium and -iron complexes, Cp′Rh(cod) and Cp′Fe(CO)2Y (Cp′: trisubstituted cyclopentadienyls, Y = alkyl or halogen) are optically resolved on a preparative scale into enantiomers with efficincies of 100 and 50%ee, respectively, by liquid chromatography on a polyamide column using aqueous β-cyclodextrin as a mobile phase.
A Novel Three-Dimensional Cyano-Linked Metal-Complex Host Clathrate [{Cd(imH)}{Cd(CN)3(imH)}{Cd(CN)3}]·C6H6 (imH = imidazole): X-Ray Single Crystal Structure and Solid State 113Cd and 2H NMR
Authors: Kim Chong-Hyeak , Soma Takayoshi , Nishikiori Shin-ichi , Iwamoto Toschitake 
Published: March 2006

Abstract
The title clathrate involves imidazole-ligated octahedral and tetrahedral Cd atoms along with CN-only-ligated tetrahedral Cd linked by CN bridges to one another to give a three-dimensional host framework in which the guest benzene molecule takes a uniaxial reorientational motion about the molecular sixfold axis.
Noble Selectivity Change in the Hydrogenation of CO over Palladium Membrane Catalysts
Authors: Naito Shuichi , Amemiya Noriyuki 
Published: March 2006

Abstract
Higher selectivity for oxygenated products was observed in CO-H2 reaction when hydrogen was supplied separately by the permeation through Pd membrane, than that when both CO and H2 were supplied on Pd surface from the gas phase, indicating the direct participation of bulk hydrogen for oxygenated product formation.
Photoluminescence Property of Titanium Silicalite-2 Catalyst and Its Photocatalytic Reactivity for the Direct Decomposition of NO at 295 K
Authors: Zhang Shu Guo , Ichihashi Yuichi , Yamashita Hiromi , Tatsumi Takashi , Anpo Masakazu 
Published: March 2006

Abstract
The titanium silicalite-2 (TS-2) catalyst exhibits a photoluminescence spectrum at around 450–550 nm as well as the distinct and characteristic photocatalytic activity towards the direct decomposition of NO into N2, O2 and N2O at 295 K under UV irradiation. XAFS and photoluminescence investigations indicated that the charge transfer excited state of the titanium oxide moieties having a tetrahetral coordination plays a significant role in the photoluminescence and photocatalytic reactivities of the TS-2 catalyst.
The Confinement of Hydrogen in LaNi5 Hydride Using Surface Poisoning
Authors: Sakaguchi Hiroki , Gotoh Yukio , Adachi Gin-ya 
Published: March 2006

Abstract
It has been found that an LaNi5 hydride treated with a CO gas is stable in air at room temperature. The hydrogenation of acetophenone or 1-octene was performed using the CO-treated hydride. The reaction well proceeded and it was confirmed that hydrogen confined in the hydride can be available for reactions. The use of the CO-treated LaNi5 hydride, therefore, can simplify the operation for hydrogenation.
Effect of Samarium Iodide on Isocyanate-Polymerization by Alkyllithiums
Authors: Wang Jia , Nomura Ryoji , Endo Takeshi 
Published: March 2006

Abstract
An addition of samarium iodide (SmI2 or SmI3) drastically suppressed the trimerization of isocyanates during the polymerization with alkyllithiums, providing the polymer with high molecular weight in good yield.
Conversion of Rectangular Tetrasulfide Ligand in Tetrarhodium Complex, [{(RhCp*)2(μ-CH2)2}2(μ4-S4)]2+ (Cp* = η5-C5Me5), into Disulfide Ligands in Dirhodium Complex, [(RhCp*)2(μ-CH2)2(μ-S2)] by Chemical Reduction
Authors: Nishioka Takanori , Nakamura Shigeyuki , Kaneko Yuichi , Suzuki Takayoshi , Kinoshita Isamu , Kiyooka Syun-ichi , Isobe Kiyoshi 
Published: March 2006

Abstract
Reaction of [{(RhCp*)2(μ-CH2)2}2(μ4-S4)]2+ (Cp* = η5-C5Me5) (1) containing a rectangular S4 ligand with the reducing agent of NaBH4 affords [(RhCp*)2(μ-CH2)2(μ-S2)] (2) confirmed by FAB mass and 1H NMR spectra. This disulfide complex is so air-sensitive that the S2 ligand is easily oxygenated by oxygen to give an SSO ligand in [(RhCp*)2(μ-CH2)2(μ-SSO)] (3) whose structure is determined by X-ray analysis.
Vibrational Analysis of the Radical Anion and Cation of Biphenyl Based on Density Functional Calculations
Authors: Furuya Kazuhiko , Torii Hajime , Furukawa Yukio , Tasumi Mitsuo 
Published: March 2006

Abstract
The density functional theory has been used for calculating the structures and vibrational wavenumbers of the radical anion and cation of biphenyl. The radical anion has a planar structure, while the radical cation is twisted. Upon ionization, structural changes occur in the direction from benzenoid to quinoid. Unscaled wavenumbers calculated at the Becke-Lee-Yang-Parr/6-31G* level are mostly in agreement with observed vibrational wavenumbers in the literature.
Sensitive Spectrophotometric Detection of Silicic Acid in Pure Water with Slab Optical Waveguide Absorption Detector
Authors: Tsunoda Kin-ichi , Yamamoto Eiichi , Akaiwa Hideo 
Published: March 2006

Abstract
Blue silicomolybdate anion was adsorbed onto a glass slab optical waveguide (SOWG) surface as an ion associate with cetyltrimethylammonium cation and was detected with the SOWG absorption detector using a semiconductor laser (780 nm) as a light source. The sensitivity of the SOWG method for 2 cm3 of a pure water sample was ca. 20 times higher than that of conventional spectrophotometry at 3 ppb Si level, and the detection limit was ca. 0.2 ppb Si (S/N = 3).
A Novel Trinuclear Platinum(II) Complex with C, N, S Donor Ligands Containing Ferrocenyl Groups
Authors: Nagasawa Isoroku , Kawamoto Tatsuya , Kuma Hiro , Kushi Yoshihiko 
Published: March 2006

Abstract
The reaction of [Pt(hfacac)2] with 2-(ferrocenyl)benzothiazoline affords a novel trinuclear platinum(II) complex, which has six-membered Pt3S3 ring with thiolate bridging, and three cyclometallated ferrocenyl groups have a less-symmetrical configuration.
Atmospheric CO2 Fixation by Dinuclear Ni(II) Complex, [TPANi(II)(μ-OH)2Ni(II)TPA](ClO4)2 (TPA = Tris(pyridylmethyl)amine)
Authors: Ito Masami , Takita Yu-saku 
Published: March 2006

Abstract
The dinuclear Ni(II) complex [TPANi(II)(μ-OH)2Ni(II)TPA](ClO4)2 (TPA = tris(pyridylmethyl)amine) (2) can react with atmospheric CO2 readily, and forms corresponding μ-carbonate complex, [TPANi(II)(μ-CO3)Ni(II)TPA](ClO4)2 (3).
Direct Observation of Capillary Electrophoretic Phenomena Using Video Image Analysis System
Authors: Razee Saeid , Tamura Atsushi , Khademizadeh Masumeh , Masujima Tsutomu 
Published: March 2006

Abstract
A video imaging system was developed for direct observation of the seperated zones of DNS-amino acids inside a capillary during an electrophoretic run. Using a CCD video camera, the moving zone of fluorescent band was observed after irradiation of capillary with a UV lamp and monitored in 10 cm region of a capilliary. On-line data acquisition in addition with the possibility of further image processing, made it possible to get a clear and real image of the seperated bands of solute.
A New and Direct Synthesis of Lactic Acid from Acrylic Acid Using an Excimer Laser with High Intensity
Authors: Shimizu Yuichi , Kawanishi Shunichi 
Published: March 2006

Abstract
A new and direct method of XeF (351 nm) laser irradiation of acrylic acid 1 solution containing H2O2 are described for the chemical synthesis of lactic acid 2. Increase in the yield strongly depended on the irradiation dose and H2O2 feeding rate, and the formation of 2 showed the quantum yield, 0.3, and the selectivity, 50%, at the maximum yield. Product analysis indicated that OH radicals formed with high density by the laser-photolysis of H2O2 are equally bonded to the carbons of α- and β-positions of 1 to produce 2 and 3-hydroxypropanoic acid with ratio of 1 to 1.
Transition Metal-Catalyzed Intramolecular C-H/Olefin Coupling
Authors: Fujii Naoaki , Kakiuchi Fumitoshi , Chatani Naoto , Murai Shinji 
Published: March 2006

Abstract
The ruthenium- and rhodium-catalyzed intramolecular C-H/olefin coupling reactions of 1-(2-pyridyl)-1,5- and 1,6-dienes proceeded regio- and stereoselecively to give 5- or 6-membered ring products.
Chemical Vapor Deposition of Some Heterocyclic Compounds over Active Carbon Fiber to Control Its Porosity
Authors: Kawabuchi Yuji , Sotowa Chiaki , Kishino Masahiro , Kawano Shizuo , Whitehurst D Duayne , Mochida Isao 
Published: March 2006

Abstract
Chemical vapor deposition (CVD) of heterocyclic compounds was examined over commercial pitch-based active carbon fiber (ACF). The ACF treated with pyridine, pyrrole, and thiophene showed excellent preformance in the gas separation of CO2/CH4. Thermal stability of the aromatic compounds around 700 °C appears an important factor to restrict its decomposition on the pore wall where the compound is adsorbed and carbonized.
Doppler Profiles of the Balmer-α and -β Lines of the Excited Hydrogen Atoms (n = 3,4) Produced in Ar+-C2H6 Collisions
Authors: Tokeshi Manadu , Nakashima Keiji , Ogawa Teiichiro 
Published: March 2006

Abstract
The Doppler profiles of the Balmer lines are very broad; their width decreases at lower ion energies. The translational energy distributions of H* calculated from the Doppler profile have two major components at about 10 eV and at about 100 eV for 2.5 keV of Ar+.
Preparation and Characteristics of LaMnO3 Thin Film Electrode on YSZ by a Vapor-Phase Process
Authors: Ioroi Tsutomu , Ogumi Zempachi , Takehara Zen-ichiro , Uchimoto Yoshiharu 
Published: March 2006

Abstract
Dense and thin LaMnO3/YSZ/La0.85Sr0.15MnO3 cell was perpared by CVD-EVD process. The prepared LaMnO3 film was sufficiently uniform and dense, no pore or crack was observed in the LaMnO3 film. AC impedance measurements indicated that the electrode interface conductivity was linearly dependent on the electrode surface area. For dense and thin film electrode of LaMnO3, oxygen electrochemical reacion proceeded predominantly at the electrode surface region.
Ionophoric Properties of a Doubly-Bridged Calix[8]arene Bearing a Eight-Oxygens Converging Cavity
Authors: Ikeda Atsushi , Suzuki Yoshio , Akao Kiyotaka , Shinkai Seiji 
Published: March 2006

Abstract
A novel globular molecule was synthesized by doubly-bridging calix[8]arene at 1,5- and 3,7-phenol units. The structure is very unique because of its high molecular symmetry and eight oxygens convergently integrated in a cavity. Extraction and 1H NMR spectroscopic studies established that this cavity shows the high Cs+ affinity as well as the high Cs+/Na+ selectivity.
Michael Reaction in the Solid State under Microwave Irradiations
Authors: Boruah Anima , Baruah Mukulesh , Prajapati Dipak , Sandhu Jagir S 
Published: March 2006

Abstract
The Michael reaction of α,β-ethylenic ketones with nitroalkane, diethylmalonate, acetonitrile and acetylacetone in presence of alumina and without any solvent, under microwave irradiations proceeded very efficiently and furnished excellent yields of adducts.
Efficient Transport of Aliphatic Amino Acids Mediated by Lanthanide Complex Carriers under Neutral Conditions
Authors: Tsukube Hiroshi , Shinoda Satoshi , Uenishi Jun’ichi , Shiode Mihoko , Yonemitsu Osamu 
Published: March 2006

Abstract
Lipophilic lanthanide tris(β-diketonates) effectively mediated transport of the aliphatic amino acids such as valine and leucine under neutral conditions, though conventional carriers rarely transported these zwitterions.
Stability of Ln3Ba2Mn2Cu2O12 (Ln = lanthanide) Compounds and Their Magnetic Properties
Authors: Matsubara Ichiro , Funahashi Ryoji , Kida Noriaki , Ueno Kazuo 
Published: March 2006

Abstract
The layered manganocuprate Ln3Ba2Mn2Cu2O12 (Ln = lanthanide) consists of an intergrowth of single rock-salt layers with quadruple oxygen-deficient perovskite layers. This structure is stabilized by a particular ionic size at the Ln site (Ln = Sm, Eu, Gd). The ground state changes from a spin glass to a ferromagnetic phase with decreasing size of the Ln ion (Sm → Gd).
A Macrocyclic Co(II)Pb(II) Complex: Neighboring Pb(II) Effect upon Reversible Superoxo-cobalt Complex Formation in Solid State
Authors: Shimoda Jun-ichi , Furutachi Hideki , Yonemura Masami , Ohba Masaaki , Matsumoto Naohide , Okawa Hisashi 
Published: March 2006

Abstract
A diphenoxo-bridged Co(II)Pd(II) complex of a dinucleating macrocycle, derived from the [2:1:1] condensation of 2,6-diformyl-4-methylphenol, ethylenediamine and diethylenetriamine, forms a reversible dioxygen-adduct in solid state.
A Novel Oxidatively Induced Structural Rearrangement of Diruthenocenyl Disulfide to the First Transition-metal Complex of 2,4-Cyclopentadien-1-thione
Authors: Sato Masaru , Sensui Masa-aki 
Published: March 2006

Abstract
The first transition metal-stabilized complex of 2,4-cyclopentadien-1-thione was synthesized in the oxidation of diruthenocenyl disulfide with p-BQ/BF3·OEt2.
Absorption of Atmospheric Phenol by Evergreen Broad-leaved Tree Species
Authors: Kondo Takayuki , Hasegawa Kiyoshi , Kitagawa Chiharu , Uchida Ryutaro , Onishi Masanori 
Published: March 2006

Abstract
To estimate the effect of tree planting on atmospheric phenol, the absorption of phenol by evergreen broad-leaved tree species was examined. In experiments in which the light intensity was varied for camellia, a linear relationship between the phenol absorption rate and the transpiration rate was observed, showing that atmospheric phenol is absorbed through the stomata. The absorption rates for five tree species varied from 21.3 (camellia) to 52.3 ng dm−2h−1ppb−1 (oleander) at 1000 μmol of photons m−2s−1 and the trees exhibiting higher transpiration rates had greater absorption rates of phenol.
Telbivudine: A Novel Nucleoside Analog for Chronic Hepatitis B
Authors: Kim Jiwon W , Park Susie H , Louie Stan G 
Published: March 2006

Objective: To review available literature on the pharmacology, pharmacokinetics, dosing and administration, efficacy, and safety of the antiviral nucleoside analog telbivudine. Data Sources: Information was obtained from searching MEDLINE (1966–December 2005), International Pharmaceutical Abstracts (1970–December 2005), and the Cochrane Database of Systematic Reviews (4th quarter 2005) using the search words telbivudine, L-dT, L-deoxythymidine, L-nucleosides, and nucleosides. Abstracts from the Annual Meeting of the American Association for the Study of Liver Diseases and European Association for the Study of the Liver were also searched, including bibliographies from the identified articles. Study Selection and Data Extraction: Data from double-blind, placebo-controlled clinical trials and unpublished information were extracted. Data Synthesis: Telbivudine is a novel, orally administered nucleoside analog under development for use in the treatment of chronic hepatitis B. In contrast to other nucleoside analogs, telbivudine has not been associated with inhibition of mammalian DNA polymerase with mitochondrial toxicity. Telbivudine demonstrated potent activity against hepatitis B with significantly higher rate of response and superior viral suppression compared with lamivudine, the standard treatment. Telbivudine has been generally well tolerated, with low adverse effect profile, and at its effective dose, no dose-limiting toxicity has been observed. Conclusions: Telbivudine is a novel oral nucleoside analog effective in the treatment of chronic hepatitis B infection.
Valproic Acid Management of Acute Alcohol Withdrawal
Authors: Lum Elaine , Gorman Sean K , Slavik Richard S 
Published: March 2006

Objective: To review the clinical evidence to determine the efficacy and safety of valproic acid in the management of alcohol withdrawal syndrome (AWS). Data Sources: MEDLINE (1966–February 2006), EMBASE (1980–February 2006), and PubMed (1966–February 2006) searches identified pertinent studies that were conducted in humans and published in English. Key words used for identification of articles included valproic acid, ethanol, alcohol, alcoholism, alcohol withdrawal delirium, alcohol withdrawal seizures, and substance withdrawal syndrome. References of identified articles were manually searched. Study Selection and Data Extraction: All controlled clinical trials that evaluated the use of valproic acid for the management of AWS in humans were included. Data Synthesis: Comparisons were made among various regimens of valproic acid and traditional therapy with benzodiazepine or nonbenzodiazepine agents. Only 2 of 6 trials reported a statistically significant difference in favor of valproic acid on endpoints of AWS. However, these differences were of marginal clinical significance. The number of patients included in these studies did not allow for adequate evaluation of safety. Conclusions: The existing limited efficacy and safety data suggest that valproic acid should not replace conventional therapy or be used as adjunct therapy for management of mild-to-moderate AWS.
Using Vancomycin Concentrations for Dosing Daptomycin in a Morbidly Obese Patient with Renal Insufficiency
Authors: Pai Manjunath P , Mercier Renee-Claude , Allen Sarah E 
Published: March 2006

Objective: To report a case in which vancomycin clearance was used to determine the daptomycin dosing interval in a morbidly obese patient with renal impairment. Case Summary: A 46-year-old man (209 kg; 178 cm) failed a 42 day course of vancomycin therapy for treatment of a methicillin-resistant Staphylococcus aureus–infected wound and cellulitis. The median trough vancomycin concentration was 12.6 μg/mL (range 7.3–24.1) through his course of therapy. Estimation of creatinine clearance (Clcr) was confounded in this clinical scenario, given the patient's weight and a lack of valid equations in this patient population. Daptomycin was administered empirically at 6 mg/kg dosed every 48 hours based on estimated clearance from measured vancomycin concentrations. Steady-state plasma concentrations of daptomycin were determined, and the daptomycin half-life in this patient was more accurately estimated using vancomycin clearance as a surrogate. In addition, a 4 mg/kg dose of daptomycin would have been sufficient based on plasma concentrations. The patient demonstrated rapid clinical improvement and remained free of cellulitis for 6 months after completion of daptomycin and a 12 week course of trimethoprim/sulfamethoxazole. Discussion: The dosing interval of daptomycin is adjusted based on Clcr. However, estimation of Clcr is difficult in morbidly obese patients with renal impairment, given a lack of valid equations. In this clinical scenario, vancomycin concentrations were used to estimate Clcr and served as a surrogate measure to determine the daptomycin dosing interval. Measured daptomycin concentrations validated this approach and confirmed the inadequacy of commonly used Clcr equations. Conclusions: In this clinical scenario, vancomycin concentrations more accurately estimated Clcr, thereby facilitating determination of the daptomycin dosing interval.
Definitive N-Terminal Protein Sequence and Further Characterization of the Novel Apolipoprotein A5 in Human Serum
Authors: Alborn William E , Johnson Melvin G , Prince Melvin J , Konrad Robert J 
Published: March 2006

Abstract
Background: Apolipoprotein A5 (ApoA5) originally gained attention as a regulator of serum triglyceride concentrations through transgenic mouse studies. Our group recently developed the first assay to quantify serum ApoA5 protein concentrations and demonstrated that they are increased by administration of a potent peroxisome proliferator-activated receptor-α agonist.
Methods: To better characterize the circulating ApoA5, the protein was purified from human serum, and a definitive N-terminal protein sequence was obtained. In light of previous observations that ApoA5 was present in VLDL and not LDL, plasma infranatant and intermediate-density lipoprotein (IDL) were analyzed for ApoA5. Because the mature protein contains a single unpaired cysteine, ApoA5 in human serum was immunoprecipitated, and its migration pattern was examined via Western blotting under reducing and nonreducing conditions to determine whether the protein circulates as a disulfide-linked homodimer or heterodimer.
Results: Definitive N-terminal protein sequences obtained from ApoA5 purified from human serum indicated that cleavage of the signal peptide occurs in vivo at the predicted site. We found ApoA5 in VLDL, HDL, and chylomicrons but not in LDL, IDL, or plasma infranatant. Under both reducing and nonreducing conditions, ApoA5 migrated mainly as a single band with a relative molecular mass (Mr) of ∼39 000, indicating that the protein exists in serum as a monomer and not as a disulfide-linked homodimer or heterodimer.
Conclusions: Our data help characterize ApoA5 by defining its lipoprotein particle distribution, by determining its N-terminal protein sequence, and by demonstrating that the mature protein circulates mainly as a monomer and not as a disulfide-linked homodimer or heterodimer.