bluuebunny/crossref_metadata_2025_split huggingface dataset:
Copper(II) Compounds Extended by 5-Carboxysalicylaldehyde and Its Schiff Bases: Interplay of Two Metal-Binding Sites and Intermolecular Stacking Contributing to Their Network and Bulk Structures
Authors: Sakamoto Reki , Ohba Masaaki , Fukita Nobuo , Takahashi Kazuhiro , Okawa Hisashi , Thompson Laurence K 
Published: June 2006

Abstract
5-Carboxysalicylaldehyde (H2casal) formed two mixed-ligand complexes, [Cu(Hcasal)(bpy)]ClO4 (1) and [Cu(casal)(bpy)]·2H2O (2) (bpy = 2,2′-bipyridine) and the Schiff bases H2L1 and H2L2 derived by condensing H2casal with N,N-dimethylethylenediamine and bis(3-aminopropyl)amine, respectively, formed [Cu(L1)]·0.25H2O (3) and [Cu(L2)]·H2O (4), respectively. X-Ray crystallographic studies were done for 1, [Cu(casal)(bpy)(MeOH)] (2′), [Cu(L1)]·4H2O (3′) and 4. 1: Monoclinic, space group C2/c, a = 18.457(5), b = 19.215(5), c = 12.237(3) Å, α = 90, β = 121.76(2), γ = 90°, V = 3690(1) Å3, and Z = 8. It has a dimeric structure with a perchlorato bridge between two [Cu(Hcasal)(bpy)]+ moieties. In the bulk the dimeric units are assembled by interligand noncovalent interactions providing a pseudo 2-D sheet. 2′: Monoclinic, space group P21/m, a = 9.791(4), b = 6.850(4), c = 25.56(1) Å, α = 90, β = 98.99(3), γ = 90°, V = 1692(1) Å3, and Z = 4. The casal2− combines one copper at the mixed-ligand site and the carboxylato group unidentately coordinates to the adjacent molecule, providing a 1-D zipper-like chain. The 1-D chains are further assembled through the interchain bpy/bpy stacking to form a pseudo 2-D network extended on the bc plane. 3′: Tetragonal, space group I41/a, a = b = 16.006(3), c = 27.745(7) Å, α = β = γ = 90°, V = 7108(2) Å3, and Z = 16. It has a 1-D helical structure extended by Cu–NNO(spacer)OO–Cu linkages along c axis (Fig. 6): The nearest Cu–Cu separation in the chain is 9.60 Å. The four water molecules exist in the helical column but are readily removed in the air. 4: Monoclinic, space group P21/c, a = 9.149(6), b = 17.566(6), c = 11.004(6)Å, α = 90, β = 110.03(4), γ = 90°, V = 1661(1) Å3, and Z = 4. It has a 1-D zigzag chain structure extended by Cu–NNNO(spacer)O–Cu linkages. Further, the 1-D chains align through noncovalent interchain interaction to provide a pseudo 2-D sheet. The interplay of the two dissimilar metal-binding sites of H2casal and its Schiff bases and the intermolecular noncovalent interaction contributing to the network and bulk structures of the complexes are discussed.
Multimetallic Activation of Molecular Hydrogen, Leading to Hydrogenation of the Coordinated Azulenes in Di-, Tri-, and Tetranuclear Ruthenium Carbonyl Complexes
Authors: Nagashima Hideo , Suzuki Akihiro , Nobata Mitsuharu , Aoki Katsuyuki , Itoh Kenji 
Published: June 2006

Abstract
Hydrogenation of di-, tri-, and tetranuclear ruthenium carbonyl complexes bearing guaiazulene or 4,6,8-trimethylazulene as the bridging ligand to bind the multimetallic framework was studied: [μ2 : η-guaiazulene)Ru2(CO)5 (1a)], [μ2 : η-4,6,8-trimethylazulene)Ru2(CO)5 (1b)], [(μ3 : η-guaiazulene)Ru3(CO)7 (2a)], [(μ3 : η-4,6,8-trimethylazulene)Ru3(CO)7 (2b)], [(μ3 : η-guaiazulene)Ru4(CO)9 (3a)], and [(μ3 : η-4,6,8-trimethylazulene)Ru4(CO)9 (3b)]. Reactions of these di-, tri-, and tetraruthenium complexes with dihydrogen (PH2 = 5—10 atm) at 100 °C resulted in cluster fragmentation and addition of five hydrogen atoms to the azulene ligands to form mononuclear ruthenium carbonyl hydride compounds, [(η5-pentahydroguaiazulenyl)RuH(CO)2 (4a)] or [(η5-pentahydrotrimethylazulenyl)RuH(CO)2 (4b)]. Despite potential formation of several stereoisomers dependent on the addition modes of hydrogen atoms, only one isomer of 4a or 4b was obtained in the hydrogenation. The crystal structure of a derivative of 4a revealed that the addition of hydrogen atoms occurred from the face of the azulene ligand originally bonded with the ruthenium species. Hydrogenation of the di-, tri-, and tetranuclear ruthenium complexes below 100 °C revealed that only the triruthenium compounds reacted with H2 at 50 °C via triruthenium dihydride intermediates: [(μ2: η-tetrahydroguaiazulene)Ru3H2(CO)7 (6a)] or [(μ2: η-tetrahydrotrimethylazulene)Ru3H2(CO)7 (6b)]; this indicates that there exists a reaction pathway to achieve facile activation of dihydrogen by the triruthenium clusters.
Angle-Resolved X-Ray Photoelectron Spectroscopic Study on a Self-Assembled Monolayer of a Porphyrin–Ferrocene–Thiol Linked Molecule on Gold: Evidence for a Highly Ordered Arrangement for Efficient Photoinduced Electron Transfer
Authors: Yanagida Masatoshi , Kanai Toshihito , Zhang Xue-Qun , Kondo Toshihiro , Uosaki Kohei 
Published: June 2006

Abstract
The orientation of a self-assembled monolayer (SAM) of the 5-(4-{8-[(11-mercaptoundecanoyl)ferrocenyl]octyloxy}phenyl)-10,15,20-triphenylporphyrin (PC8FcC11SH) molecule on a gold substrate, at which a photoinduced up-hill electron transfer with the highest quantum efficiency (&gt;10%) ever reported was achieved, was investigated using angle-resolved X-ray photoelectron spectroscopy (ARXPS) combined with an electrochemical coverage determination. The total thickness and the distance between the Fe and the outermost part of the SAM of the PC8FcC11SH molecule was determined to be 44 and 29 Å, respectively, showing that while alkyl chains in the ferrocenecarbonylundecanethiol (FcC11SH) part of the PC8FcC11SH SAM should be oriented with a tilt angle of ca. 30° normal to the gold surface, the plane of the porphyrin ring should be almost surface-normal. This result suggests that one of the most important reasons for the very high photoconversion efficiency is the large separation between gold and the porphyrin ring, leading to a reduction in the reverse electron transfer and energy transfer quenching of the excited porphyrin state by gold.
Crystal Growth of Perylene Microcrystals in the Reprecipitation Method
Authors: Kasai Hitoshi , Oikawa Hidetoshi , Okada Shuji , Nakanishi Hachiro 
Published: June 2006

Abstract
The crystal growth of α-perylene microcrystals in the reprecipitation method was studied using of light-scattering technique and absorption spectroscopy. A certain model for microcrystallization has been established. The relationship between the reprecipitation conditions and the crystal size was clarified on the basis of this model. Especially, the water temperature was confirmed to be one of the most important parameters used to control the size of the microcrystals in the reprecipitation method. The apparent activation energy for the microcrystallization of perylene was estimated to be 68 kJ mol−1.
(η5-Cyclopentadienyl)(Halo or Acido)(Substituted 1-Methylthio-κS-ethylene-2-thiolato)cobalt(III): Formation, Stereoisomers, and Isomerization
Authors: Harada Takaaki , Takayama Chikako , Kajitani Masatsugu , Sugiyama Toru , Akiyama Takeo , Sugimori Akira 
Published: June 2006

Abstract
The addition of protic acids to (η5-cyclopentadienyl)(1-methylenethio)-κC,κS-ethylene-2-thiolato)cobalt(III) complexes (2) causes a Co–C bond cleavage in the three-membered cobaltathiirane ring to give (η5-cyclopentadienyl)(halo or acido)(1-methylthio-κS-ethylene-2-thiolato)cobalt(III) complexes (3). In the crystalline state, these complexes have either syn- or anti-configuration with respect to halo (or acido) and the methyl or substituted methyl group attached to S. In some cases, complexes 3 exist in equilibria between syn- and anti-stereoisomeric forms in solutions. In solutions, an exchange of the coordinated anions occurs very easily.
Effects of the Encapsulation of Alkali Ions into Iron(III) Complexes with a Macrocyclic Ring on Magnetic Properties
Authors: Maeda Yonezo , Suzuki Masaki , Hirose Shigeyuki , Hayami Shinya , Oniki Takayuki , Sugihara Shinji 
Published: June 2006

Abstract
New spin-crossover iron(III) complexes [FeM(salten)L]X with an alkali ion in a macrocycle have been prepared, and the magnetic properties of the complexes in the solid and in acetonitrile solution have been examined, where M is Li+, Na+, K+, or Rb+, H2salten is 4-aza-heptamethylene-1,7-bis(salicylideneiminate) and L is N-(4-picolyl)-aza-15-crown-5-ether. The spin-crossover behaviors of the iron(III) complexes dependent on temperature in the solid are observed on the Mössbauer spectra and magnetic susceptibilities, and those in acetonitrile on the electronic spectra. The magnetic properties of the complexes in the solid are changed with the species of alkali metal ions included in a macrocycle. Li-complexes show the magnetic moment of 4.00 B.M. at 300 K and 2.19 B.M. at 80 K, and Na-complexes 5.03 B.M. at 300 K and 4.21 B.M. at 80 K. The Mössbauer spectra of Li-complexes show that the interexchange rates of the spin-state transition between high-spin and low-spin states are as fast as the reciprocal of the lifetime of the excited state of 57Fe(10−7s) above 110 K. The magnetic behaviors of all of the complexes in acetonitrile are similar.
Synthesis of Gallium-sodalite from a Layered Silicate with a Half Cup-type Sodalite Cage Structure
Authors: Kiyozumi Yoshimichi , Ikeda Takuji , Hasegawa Yasuhisa , Nagase Takako , Mizukami Fujio 
Published: June 2006

Abstract
Gallium-sodalite (Ga-SOD) was synthesized from a half cup-type sodalite cage layered silicate (named; HLS: [(CH3)4N]2Na2 [Si10O20(OH)4] 5.6H2O) by solid-state transformation. HLS was easily converted to the Ga-SOD by mixing it with Ga(OH)3 and heating at 150 °C for 3 h after adding a small amount of H2O as the solvent. Ga was inserted into the T-site of the SOD cage obtained.
Solvent Switching of Stereoselectivity in [4 + 4] Photocyclodimerization of 2-Anthracenecarboxylic Acid
Authors: Mizoguchi Jun-ichi , Wada Takehiko , Inoue Yoshihisa 
Published: June 2006

Abstract
Stereochemistry of the major photocyclodimer is switched from 52% anti-head-to-head to 51% anti-head-to-tail among the four stereoisomers produced upon irradiation of 2-anthracenecarboxylic acid at low temperatures by changing the solvent from dichloromethane to methanol, through a critical control of the hydrogen bonding and dipole–dipole interactions.
Differences of the Mechanical Setup of Hip Simulators and Their Consequences on the Outcome of Hip Wear Testing
Authors: Reinisch G , Schoerg J , Leder E , Judmann KP , Plitz W , Franek F 
Published: June 2006

Abstract
The search for improved wear resistant materials for hip endoprostheses has lead to an international standard for wear testing of total hip joint prosthesis (ISO 14242). The displacement and load curves in this standard are derived from clinical gait analysis. However the standard leaves the interpretation of its displacement curves open since no coordinate system is defined in the document. By reviewing the development of the standard, the apparent coordinate system is identified and its application from both, an anatomical point of view and a technical perspective for designing hip simulators is explained. The study examines the coordinate transformations necessary for using common gait analysis data with the standard. On the basis of these transformations, the relative movements of the articulating surfaces are compared with existing hip simulators, the situation in vivo and the guidelines of the ISO standard. Thus possible consequences on the outcome of hip wear testing are discussed.
Seismic Evaluation of Low-Rise Reinforced Masonry Buildings with Flexible Diaphragms
Authors: Cohen GL , Klingner RE , Hayes JR , Sweeney SC 
Published: June 2006

Abstract
This paper provides an integrated approach to the seismic evaluation of low-rise reinforced masonry buildings with flexible roof diaphragms. The paper is divided into four phases. In Phase 1 (Behavior), results from shaking-table testing, quasi-static testing, and analytical predictions are integrated to provide a coherent description of the seismic response of low-rise reinforced masonry buildings with flexible roof diaphragms. Two half-scale, low-rise reinforced masonry buildings with flexible roof diaphragms are subjected to earthquake ground motions on the Tri-axial Earthquake and Shock Simulator at the United States Army Construction Engineering Research Laboratory, Engineer Research and Development Center. Following the shaking-table tests, diaphragms and top four courses of attached masonry walls are salvaged from the half-scale structures and tested quasi-statically in their own plane. A new index, the diaphragm drift ratio, is introduced to describe the potential for diaphragm damage. In Phase 2 (Analysis), coordinated analytical modeling is developed and implemented to corroborate and extend the results of that experimental work, and to examine the efficacy and accuracy of different analytical modeling approaches. Linear elastic finite-element models, simplified two-degree-of-freedom models, and nonlinear lumped-parameter models are developed; all agree well with measured responses. In Phase 3 (Seismic Evaluation), the first two phases are used to develop and verify a simple extension to FEMA 310, the predominant seismic evaluation methodology for low-rise reinforced masonry building with flexible diaphragms. In Phase 4 (Application and Verification), the proposed extension, applied to four existing buildings, is shown to be simple, useful, and necessary.
The Role of the Bovine Growth Hormone Receptor and Prolactin Receptor Genes in Milk, Fat and Protein Production in Finnish Ayrshire Dairy Cattle
Authors: Viitala Sirja , Szyda Joanna , Blott Sarah , Schulman Nina , Lidauer Martin , Mäki-Tanila Asko , Georges Michel , Vilkki Johanna 
Published: June 2006

Abstract
We herein report new evidence that the QTL effect on chromosome 20 in Finnish Ayrshire can be explained by variation in two distinct genes, growth hormone receptor (GHR) and prolactin receptor (PRLR). In a previous study in Holstein–Friesian dairy cattle an F279Y polymorphism in the transmembrane domain of GHR was found to be associated with an effect on milk yield and composition. The result of our multimarker regression analysis suggests that in Finnish Ayrshire two QTL segregate on the chromosomal region including GHR and PRLR. By sequencing the coding sequences of GHR and PRLR and the sequence of three GHR promoters from the pooled samples of individuals of known QTL genotype, we identified two substitutions that were associated with milk production traits: the previously reported F-to-Y substitution in the transmembrane domain of GHR and an S-to-N substitution in the signal peptide of PRLR. The results provide strong evidence that the effect of PRLR S18N polymorphism is distinct from the GHR F279Y effect. In particular, the GHR F279Y has the highest influence on protein percentage and fat percentage while PRLR S18N markedly influences protein and fat yield. Furthermore, an interaction between the two loci is suggested.
Mapping Quantitative Trait Loci for Longitudinal Traits in Line Crosses
Authors: Yang Runqing , Tian Quan , Xu Shizhong 
Published: June 2006

AbstractQuantitative traits whose phenotypic values change over time are called longitudinal traits. Genetic analyses of longitudinal traits can be conducted using any of the following approaches: (1) treating the phenotypic values at different time points as repeated measurements of the same trait and analyzing the trait under the repeated measurements framework, (2) treating the phenotypes measured from different time points as different traits and analyzing the traits jointly on the basis of the theory of multivariate analysis, and (3) fitting a growth curve to the phenotypic values across time points and analyzing the fitted parameters of the growth trajectory under the theory of multivariate analysis. The third approach has been used in QTL mapping for longitudinal traits by fitting the data to a logistic growth trajectory. This approach applies only to the particular S-shaped growth process. In practice, a longitudinal trait may show a trajectory of any shape. We demonstrate that one can describe a longitudinal trait with orthogonal polynomials, which are sufficiently general for fitting any shaped curve. We develop a mixed-model methodology for QTL mapping of longitudinal traits and a maximum-likelihood method for parameter estimation and statistical tests. The expectation-maximization (EM) algorithm is applied to search for the maximum-likelihood estimates of parameters. The method is verified with simulated data and demonstrated with experimental data from a pseudobackcross family of Populus (poplar) trees.
An Empirical Bayes Method for Updating Inferences in Analysis of Quantitative Trait Loci Using Information From Related Genome Scans
Authors: Zhang Kui , Wiener Howard , Beasley Mark , George Varghese , Amos Christopher I , Allison David B 
Published: June 2006

Abstract
Individual genome scans for quantitative trait loci (QTL) mapping often suffer from low statistical power and imprecise estimates of QTL location and effect. This lack of precision yields large confidence intervals for QTL location, which are problematic for subsequent fine mapping and positional cloning. In prioritizing areas for follow-up after an initial genome scan and in evaluating the credibility of apparent linkage signals, investigators typically examine the results of other genome scans of the same phenotype and informally update their beliefs about which linkage signals in their scan most merit confidence and follow-up via a subjective–intuitive integration approach. A method that acknowledges the wisdom of this general paradigm but formally borrows information from other scans to increase confidence in objectivity would be a benefit. We developed an empirical Bayes analytic method to integrate information from multiple genome scans. The linkage statistic obtained from a single genome scan study is updated by incorporating statistics from other genome scans as prior information. This technique does not require that all studies have an identical marker map or a common estimated QTL effect. The updated linkage statistic can then be used for the estimation of QTL location and effect. We evaluate the performance of our method by using extensive simulations based on actual marker spacing and allele frequencies from available data. Results indicate that the empirical Bayes method can account for between-study heterogeneity, estimate the QTL location and effect more precisely, and provide narrower confidence intervals than results from any single individual study. We also compared the empirical Bayes method with a method originally developed for meta-analysis (a closely related but distinct purpose). In the face of marked heterogeneity among studies, the empirical Bayes method outperforms the comparator.
A newborn with anophthalmia and pulmonary hypoplasia (the Matthew–Wood syndrome)
Authors: Li Lin , Wei Jueyang 
Published: June 2006

AbstractThe combination of anophthalmia and pulmonary hypoplasia with abnormal lobation is an extremely rare congenital disorder. We describe a case of a female newborn with these features that fits the recently described Matthew–Wood syndrome. © 2006 Wiley‐Liss, Inc.
Biodistribution of liposome‐entrapped human gamma‐globulin
Authors: García‐Santana María A. , Duconge Jorge , Sarmiento María E. , Lanio‐Ruíz María E. , Becquer María A. , Izquierdo Luís , Acosta‐Domínguez Armando 
Published: June 2006

AbstractThe present study was aimed at the preparation and performance evaluation of Intacglobin®‐loaded liposomes for selective drug presentation to the lungs. Egg phosphatidylcholine‐ and cholesterol‐based liposomes (1:1 and 1:0.25 mol/mol) were prepared by a dehydration–rehydration procedure. A tissue distribution study after single intranasal administration of 0.5 µCi 125I‐Intacglobin®‐loaded liposomes was conducted in Balb/c mice. The efficiencies of drug entrapment (30%) and the average diameters did not differ significantly between the two liposome formulations. However, liposomes composed of an increased cholesterol amount showed a lower in vitro drug release rate. The airway penetration efficiency of the liposomal formulation was determined by the cumulative percentage of the dose reaching the lungs (AUC) and its sojourn time therein, and were 1.7‐ and 2.2‐times higher compared with the plain 125I‐ Intacglobin® solution‐based formulation, respectively. A significantly greater (p<0.001) drug localization index after 24 h was found at the lungs in comparison with the other tissues (p<0.01), although similar values were detected between groups following administration of either liposomes or control solutions, despite the formulations attributes. In conclusion, it is suggested that longer Intacglobin exposure at the pulmonary region is observed after administration of the liposomal formulation. The results open future perspectives in assessing local passive immunization for the treatment of respiratory infectious diseases. Copyright © 2006 John Wiley & Sons, Ltd.
An Electron Microscopy Study of New Chemically Twinned Phases in the MgS—Yb2S3 System.
Authors: Urones‐Garrote Esteban , Gomez‐Herrero Adrian , Landa‐Canovas Angel R. , Otero‐Diaz L. Carlos 
Published: June 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Crystal Structure of the Hexagonal (Zn, Mg)4Ho and (Zn, Mg)4Er.
Authors: Li M. R. , Deng D. W. , Kuo K. H. 
Published: June 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Crystal Structures of Ba5Ru3‐x‐yAlxGayO11 with x = 1.24(2), y = 0, x = 0.67(1), y = 0.450(6) and x = 0, y = 1.26(2).
Authors: Schuepp‐Niewa Barbara , Shlyk Larysa , Prots Yurii , Krabbes Gernot 
Published: June 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Syntheses, Crystal Structures, and Properties of Heterometallic Iodoplumbates: Bicubane, Ribbon, and Chain Configurations.
Authors: Fan Le‐Qing , Wu Li‐Ming , Chen Ling 
Published: June 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A Simple Nitrification Route to Nanocrystalline CrN.
Authors: Cai Peijun , Zhang Wanqun , Chen Luyang , Qian Yitai 
Published: June 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Is Diazomethane Addition to Chiral α‐Keto Esters Subject to Substrate Diastereocontrol?
Authors: Petronijevic Filip , Hart Amy C. , Paquette Leo A. 
Published: June 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Catalytic Enantioselective Nozaki—Hiyama Allylation Reaction with Tethered Bis(8‐quinolinolato) (TBOx) Chromium Complex.
Authors: Xia Guoyao , Yamamoto Hisashi 
Published: June 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Influence of N‐Amino Protecting Group on Aldolase‐Catalyzed Aldol Additions of Dihydroxyacetone Phosphate to Amino Aldehydes.
Authors: Calveras Jordi , Bujons Jordi , Parella Teodor , Crehuet Ramon , Espelt Laia , Joglar Jesus , Clapes Pere 
Published: June 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.