bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ultrasound factors to predict the outcome of external cephalic version: a meta‐analysis
Authors: Kok M. , Cnossen J. , Gravendeel L. , Van Der Post J. A. , Mol B. W. 
Published: December 2008

AbstractObjectiveTo systematically review the medical literature reporting on ultrasound factors that can be predictive for the outcome of an attempt at external cephalic version (ECV).MethodsMEDLINE, EMBASE and Cochrane Central Register of Controlled Trials were searched. Studies reporting on potential ultrasound prognosticators and ECV success rates that allowed construction of a 2 × 2 table were selected.ResultsWe selected 37 primary articles reporting on 7709 women. Posterior placental location (odds ratio (OR), 1.9; 95% CI, 1.5–2.4), complete breech position (OR, 2.3; 95% CI, 1.9–2.8) and an amniotic fluid index > 10 (OR, 1.8; 95% CI, 1.5–2.1) were predictors of successful ECV.ConclusionSuccess of an ECV attempt is associated with ultrasound parameters such as fetal position, amniotic fluid and placental location. This knowledge can be used to develop a prognostic model to predict successful ECV. Copyright © 2008 ISUOG. Published by John Wiley & Sons, Ltd.
X‐ray techniques applied to surface paintings of ceramic pottery pieces from Aguada Culture (Catamarca, Argentina)
Authors: Bertolino Silvana R. , Galván Josa Victor , Carreras Alejo C. , Laguens Andrés , de la Fuente Guillermo , Riveros José A. 
Published: December 2008

AbstractX‐ray diffraction (XRD), energy dispersive spectrometry (EDS), x‐ray imaging (XRI) and scanning electron microscopy (SEM) techniques were applied to characterize and differentiate surface paintings of archeological pottery from the Aguada Ambato and Portezuelo styles (Catamarca, Argentina). Standard procedures are not always appropriate for such samples (paint layers are porous, nonplanar and discontinue). Image processing is necessary when chemical contrast is not discriminated. Soft x‐ray lines (e.g. Fe L) are more revealing because those detected come from shallower depths, clearly depicting the composition of the paint layer.These styles differ in mineralogy and chemistry suggesting that they are two distinctive entities not only on their designs but also on the materials chosen and the technology used. Aguada Portezuelo paints contain Ca (white), FeMn (black), FeMnCa (dark reddish) and FeCa (reddish). The white ones correspond to gehlenite, a firing product (possible firing temperature ≥900–1000 °C); calcite and CaO occur in cases of firing temperatures <900 °C.Aguada Ambato presents difficulties for paint discrimination; only EDS spectra show slight differences. White paint from Tricolor Ambato contains mainly Pb‐phases (hatchite, anglesite, plumalsite), reddish paint resembles the paste (∼Fe, hematite); reddish surfaces may have not been painted but polished. Black paint has scarce Mn–minerals. On Black Incised sherds no particular phase was identified suggesting possible organic pigments or resulting from the firing technique.The chemistry and mineralogy of the paste almost always overlap that of the paints; painted layer is irregular and partially worn by years of burial. Copyright © 2009 John Wiley & Sons, Ltd.
High‐resolution x‐ray analysis with multilayer gratings
Authors: Jonnard P. , Le Guen K. , André J.‐M. 
Published: December 2008

AbstractPeriodic multilayers are nowadays widely used to perform x‐ray analysis in the soft x‐ray range (photon energy lower than 1 keV). However, they do not permit to obtain high‐resolution spectra such as natural or synthetic crystals. Thus, multilayers cannot resolve interferences between close x‐ray lines. It has been shown and demonstrated experimentally that patterning a grating profile within a multilayer structure leads to a diffractive optics with improved resolving power. We illustrate the use of an Mo/B4C multilayer grating in the Fe L and C K spectral ranges, around 700 and 280 eV, respectively. First, in the Fe L range, the improved spectral resolution enables us to distinguish the Fe Lα and Lβ emissions (separated by 13 eV). In addition, using a sample made of a mix of LiF and an iron ore, we show that it is possible to easily resolve the F K and Fe L emissions. These examples demonstrate that an improved x‐ray analysis can be obtained with multilayer gratings when there is the need to study samples having elements giving rise to close emission lines. Second, in the C K range, by comparing C Kα spectra from B4C and cellulose, we show that the shape of the emission band is sensitive to the chemical state of the carbon atom. Copyright © 2009 John Wiley & Sons, Ltd.
Investigation of the Quasi Binary System BaAu–BaPt
Authors: Saltykov Vyacheslav , Nuss Jürgen , Konuma Mitsuharu , Jansen Martin 
Published: December 2008

AbstractPhase equilibria in the system BaAu–BaPt have been investigated by X‐ray powder diffraction. Depending on composition, three structure types occur, the FeB type for BaAu, and NiAs for BaPt, while the CrB type of structure is adopted in between. The homogeneity range for the CrB type of structure was established to extend from BaPt0.15Au0.85 to BaPt0.90Au0.10. The respective lattice parameters vary linearly, in accordance with Vegard's law. The crystal structure of the new CrB type compounds have been confirmed by X‐ray powder diffraction for the solid solution range, and by single crystal X‐ray diffraction exemplary for the composition BaAu0.5Pt0.5 (Cmcm; a = 4.3915(5) Å; b = 11.9149(12) Å; c = 4.7920(5) Å; Z = 4). BaAu was also established by single crystal structure determination (Pnma; a = 8.3220(10) Å; b = 4.9252(10) Å; c = 6.3844(10) Å; Z = 4) to complete the results. According to ESCA measurements BaAu0.5Pt0.5 and BaAu can be formulated as [Ba2+·0.5e−]·[Au−0.5·Pt2−0.5] and [Ba2+·e−]·[Au−], respectively.
Synthesis, IR Spectrum, Thermal Analysis, and Crystal Structure of the Cyano‐bridged Heteronuclear Polymeric Complex: [Zn(teta)Ni(μ‐CN)2(CN)2]n
Authors: Kürkçüoğlu Güneş Süheyla , Yeşilel Okan Zafer , Kavlak Ilkan , Büyükgüngör Orhan 
Published: December 2008

AbstractThe heteronuclear polymeric complex, [Zn(teta)Ni(μ‐CN)2(CN)2]n (teta: triethylenetetramine), was synthesized and characterized by elementel analysis, FT‐IR spectroscopy, thermal analysis and single crystal X–ray diffraction techniques. The complex crystallizes in the monoclinic system, space group P21/c and in which the ZnII ion exhibits a distorted octahedral coordination by one tetradentate teta ligand and two bridging cyano groups as a trans position, whereas the NiII ion has square planer coordination and is coordinated by four cyano ligands. The decomposition reaction takes places in the temperature range 30–600 °C in the static air atmosphere.
Synthesis, Crystal Structure, and Characterization of Two Novel Five‐coordinate Zinc(II) Complexes with the Tripod Ligand Tris(N‐methylbenzimidazol‐2‐yl‐methyl)amine and α,β‐unsaturated Carboxylates
Authors: Wu Huilu , Sun Tao , Li Ke , Xu Yuhao , Yun Ruirui , Sun Qingyu 
Published: December 2008

AbstractTwo novel five‐coordinate zinc(II) complexes with the tripod ligand tris(N‐methylbenzimidazol‐2‐ylmethyl)amine (Mentb) and two different α,β‐unsaturated carboxylates, with the composition [Zn(Mentb)(acrylate)] (ClO4)·DMF·1.5CH3OH (1) and [Zn(Mentb)(cinnamate)](ClO4)·2DMF·0.5CH3OH (2), were synthesized and characterized by means of elemental analyses, electrical conductivity measurements, IR, UV, and 1H NMR spectra. The crystal structure of two complexes have been determined by a single‐crystal X‐ray diffraction method, and show that the ZnII atom is bonded to a Mentb ligand and a α,β‐unsaturated carboxylate molecule through four N atoms and one O atom, resulting in a distorted trigonal‐bipyramidal coordination [τ(1) = 0.853, τ(2) = 0.855], with approximate C3 symmetry.
A Gadolinium Complex of the 5‐(1H‐Tetrazol‐5‐yl)isophthalic Acid Ligand: [Gd(C9H3N4O4)(H2O)3·2H2O]n
Authors: Qu Zhi‐Rong , Xing Zheng , Wu Bao‐Zhen , Li Xiu‐Zhi , Han Guang‐Fan 
Published: December 2008

AbstractThe reaction of Gd(ClO4)3·6H2O with 5‐(1H‐tetrazol‐5‐yl)isophthalic acid affords a 3D framework gadolinium coordination polymer, [Gd(C9H3N4O4)(H2O)3·2H2O]n (1). Its crystal structure belongs to a triclinic system, space group $P{\bar 1}$, with a = 7.909(2) Å; b = 8.448(2) Å; c = 10.994(2) Å; α = 102.65(3)°; β = 124.32(2)°; γ = 96.28(3)°; V = 704.5(2) Å3; Z = 2; R1 = 0.0245 for 3225 reflections with I >2σ(I), wR2 = 0.0556. Fluorescent analyses show that compound 1 exhibits purple fluorescence in the solid state at room temperature.
Solvothermal Synthesis of Two Cationic Indium Selenides with I− Ion as Counterion
Authors: Li Chun‐Ying , Zhou Jian , Zhang Yong , Lei Zhi‐Xin , Bian Guo‐Qing , Dai Jie 
Published: December 2008

AbstractTwo new indium selenides [In(en)2Se]2·2I (1) and [In(teta)Se]2·2I (2) (en = ethylenediamine, teta = triethylenetetramine) were obtained under mild solvothermal conditions and structurally characterized. Compounds 1 and 2 consist of unusual organic hybrid indium selenide cations and I− anions. These ions are assembled to two different supramolecular structures by N‐H···I and N‐H···Se H‐bonds, namely extended 3‐D network structure for 1 and extended sheet structure for 2. The optical band gaps of 2.92 eV for 1 and 3.15 eV for 2 were derived from optical absorption spectra. The thermal stability of 1 and 2 was investigated by thermogravimetric measurements.
Subtle Interplay of Weak Intermolecular Interactions. Crystal Structures of Lead(II) Complexes with 4,4′‐Dimethyl‐2,2′‐bipyridine
Authors: Marandi Farzin , Mottaghi Majideh , Meyer Gerd , Pantenburg Ingo 
Published: December 2008

AbstractThree adducts of the N,N′‐bidentate aromatic base 4,4′‐dimethyl‐2,2′‐bipyridine (dmbpy) of lead(II) salts, [Pb(dmbpy)2(NO3)2] (1), [Pb(dmbpy)2(ClO4)2] (2) and [Pb(dmbpy)(NCS)2]n (3) have been synthesized and characterized by elemental analysis, IR, 1H‐NMR and 13C‐NMR spectroscopy and studied by thermal analysis as well as X‐ray crystallography. The single‐crystal structures of these complexes show that the 6s electrons of lead(II) constitute a stereochemically active lone pair (SALP). The coordination numbers of the PbII ions are eight and seven, respectively. The supramolecular features in these complexes are guided/controlled by weak directional intermolecular interactions.
Hydrothermal Synthesis, Crystal Structure and Characterizations of Two New Manganese(II) Phosphonates with a 3D Framework Structure
Authors: Zhu Yan‐Yu , Li Jing , Sun Zhen‐Gang , Zhang Jing , Zhao Yan , Lu Xin , Liu Lei , Zhang Na 
Published: December 2008

AbstractTwo new manganese(II) phosphonates, (NH4)Mn2.5[(O3PCH(OH)CO2)2(H2O)] (1) and [NH3(CH2)4NH3]0.5Mn2.5[(O3PCH(OH)CO2)2(H2O)] (2) have been synthesized under hydrothermal conditions and structurally characterized by single‐crystal X‐ray diffraction as well as with infrared spectroscopy, elemental analysis and thermogravimetric analysis. The two isomorphous compounds feature a 3D framework structure. The Mn(1)O6 and Mn(3)O5 polyhedra are bridged by the CPO3 tetraheda into a MnII phosphonate layer in ac‐plane. Mn(2)O6 polyhedra are linked to each other by CPO3 tetraheda to form infinite chains, which are connected to layers by carboxylate groups to form a 3D framework structure with channels along the a‐ and c‐axis, respectively. The NH4+ ions or protonated 1, 4‐butylenediamine cations are located inside the channels along the a axis.
Synthese und Charakterisierung von Cobalt(II)‐ und Kupfer(I)‐Komplexen mit Guanidin‐Pyridin‐Hybridliganden
Authors: Wortmann Ramona , Hoffmann Alexander , Haase Roxana , Flörke Ulrich , Herres‐Pawlis Sonja 
Published: December 2008

Syntheses and Structures of Cobalt(II) and Copper(I) Complexes with Guanidine‐Pyridine HybridligandsThe guanidine‐pyridine hybridligands N‐(1,3‐dimethylimidazolidin‐2‐ylidene)‐2‐(pyridine‐2‐yl)ethanamine (DMEGepy, L1) and 1,1,3,3‐tetramethyl‐2‐(2‐(pyridine‐2‐yl)ethyl)guanidine (TMGepy, L2) have been synthesized and characterized. The reaction of DMEGepy with CoCl2 and TMGepy with CuI lead to the mononuclear complexes {N‐(1,3‐dimethylimidazolidin‐2‐ylidene)‐2‐(pyridine‐2‐yl)ethanamine}cobalt(II) dichloride (1) and {1,1,3,3‐tetramethyl‐2‐(2‐(pyridine‐2‐yl)ethyl)guanidine}copper(I) iodide (2). By the characterization of these complexes we are able to compare the complexation chemistry of the hybridguanidine and bisguanidine ligands with regard to the various N donor functions systematically.
Synthesen und Strukturen der Lithiumtitanate(III) und ‐(IV), (py)2Li[(py)2Ti(OPh)4] und (py)2Li[(py)Ti(OPh)5]
Authors: Veith Michael , Voigt Thorsten , Huch Volker 
Published: December 2008

Syntheses and Structures of the Lithiumtitanates(III)/(IV) (py)2Li[(py)2Ti(OPh)4] and (py)2Li[(py)Ti(OPh)5]The new lithiumtitanates (py)2Li[(py)2Ti(OPh)4] (1) and (py)2Li[(py)Ti(OPh)5] (2) have been obtained from the reaction of titaniumtrichloride (respectively titaniumtetrachloride 2) with LiOPh in the presence of the base pyridine (py). The crystal structures of both compounds show that the titanium atoms are in the centres of distorted octahedral coordination figures. In compound 1, four oxygen and two nitrogen atoms (in cis orientation) are bonded to titanium, whereas in 2, five oxygen and one nitrogen atom form the coordination polyeder around titanium. In both compounds, the lithium atoms are attached through phenolate bridges to the octahedra. The titanate (py)2Li[(py)2Ti(OPh)4] (1) has a single absorption band in the visible region of the UV‐spectrum showing a shoulder shifted to the bathochromic region, due to the Jahn‐Teller‐effect for d1‐systems.
Synthesis and Crystal Structures of NiPdTe and Ni2PdSe2
Authors: Bichler Daniel , Pocha Regina , Löhnert Catrin , Johrendt Dirk 
Published: December 2008

AbstractThe metal‐rich chalcogenides NiPdTe and Ni2PdSe2were synthesized by heating stoichiometric mixtures of the elements at 823–1323 K in silica ampoules under argon atmosphere. The structures were determined by single crystal X‐ray diffraction. NiPdTe (Pnma,a= 8.337(2),b= 3.758(1),c= 6.290(1) Å,Z= 4) is build up by a distorted cubic closed packing of Te atoms with Ni atoms in one half of the tetrahedral holes. The Ni atoms form zigzag‐chains with short Ni–Ni bonds. The Pd atoms are located in the octahedral holes and are fivefold coordinated by Te atoms due to a strong shift off the centers. The structure of NiPdTe is related to the TiNiSi type due to a similar nickel substructure and to the Cu2Sb type with respect to thefccpacking of the anions. Ni2PdSe2(I4/mmm,a= 10.446(1),c= 5.751(1) Å,Z= 8) forms a new structure type with strongly distorted edge‐ and corner‐sharing NiSe4tetrahedra. The Pd atoms are either planar coordinated by four Se or located in the centers of face‐sharing Ni8cubes. The structure of Ni2PdSe2merges metallic building blocks with structural fragments typical for polar compounds.
New Dinuclear Ru2(CO)4 Sawhorse‐Type Complexes Containing Bridging Carboxylato Ligands
Authors: Auzias Mathieu , Mattsson Johan , Therrien Bruno , Süss‐Fink Georg 
Published: December 2008

AbstractThe thermal reaction of Ru3(CO)12 with ethacrynic acid, 4‐[bis(2‐chlorethyl)amino]benzenebutanoic acid (chlorambucil), or 4‐phenylbutyric acid in refluxing solvents, followed by addition of two‐electron donor ligands (L), gives the diruthenium complexes Ru2(CO)4(O2CR)2L2 (1: R = CH2O‐C6H2Cl2‐COC(CH2)C2H5, L = C5H5N; 2: R = CH2O‐C6H2Cl2‐COC(CH2)C2H5, L = PPh3; 3: R = C3H6‐C6H4‐N(C2H4‐Cl)2, L = C5H5N; 4: R = C3H6‐C6H4‐N(C2H4‐Cl)2, L = PPh3; 5: R = C3H6‐C6H5, L = C5H5N; 6: R = C3H6‐C6H5, L = PPh3). The single‐crystal structure analyses of 2, 3, 5 and 6 reveal a dinuclear Ru2(CO)4 sawhorse structure, the diruthenium backbone being bridged by the carboxylato ligands, while the two L ligands occupy the axial positions of the diruthenium unit.
Recent Developments in the Organic Chemistry of Calcium – An Element with Unlimited Possibilities in Organometallic Chemistry?
Authors: Westerhausen Matthias 
Published: December 2008

AbstractThe organocalcium chemistry developed vastly during the last decade. The preparation of the organocalcium compoundsviadirect synthesis (insertion of Ca into a C‐X bond of phenyl halides, Grignard reaction) affords skilful procedures due to the inertia of the calcium metal and the extreme reactivity of the organocalcium derivatives. Further suitable preparative methods include metathesis reactions of CaX2with KR or LiR, metallation reactions of H‐acidic substrates, metal‐halogen exchange reactions, and transmetallation of heavy main group atoms in their compounds with calcium metal. Possibilities to stabilize organocalcium compounds include steric shielding by bulky ligands at the periphery and electronic reduction of the nucleophilicity of the calcium‐bound carbanions. Selected applications in catalysis such as hydrophosphination are also mentioned. Very recent developments and challenges in the preparation of alkaline earth metal(I) compounds are presented as well. Concepts to overcome the rather large atomization energies of the metals are discussed.
Impact of age and strain on ischemic brain injury and seizures after carotid ligation in immature mice
Authors: Comi Anne M. , Trescher William H. , Abi‐Raad Ronnie , Johnston Michael V. , Wilson Mary Ann 
Published: December 2008

AbstractStroke is an important cause of neurologic injury in the neonatal period and frequently results in lifelong neurologic impairments. We reported previously that unilateral carotid ligation on postnatal day (P)12 in CD1 mice causes acute behavioral seizures and unilateral brain injury and provides a model for neonatal stroke in human infants. In the present study we confirmed that behavioral seizures observed after ligation on P12 in the CD1 strain are associated with rhythmic ictal discharges that show temporal progression on electrocorticograms. We also examined the effects of carotid ligation performed at different ages in CD1 mice or performed in the C57Bl/6 strain. The right common carotid was ligated at P7, P10, P12 or P21 in CD1 mice or at P12 in C57Bl/6 mice. Littermate controls received sham surgery. Seizures were rated for 4 h after surgery; brain injury was scored one week later. In a separate group of P12 CD1 mice, electrocorticographic activity was recorded continuously for 4 h after carotid ligation or sham surgery. Brain injury and cumulative seizure score varied significantly with age (p < 0.001) and strain (p < 0.001). In CD1 mice, injury was greatest after ligation on P10 to P12 and seizure score was maximal at P12. Seizure scores were significantly correlated with injury after ligation on P10 or P12. C57Bl/6 mice, like C3Heb/FeJ mice examined previously, were much less vulnerable to seizures and injury than CD1 mice after ligation on P12. This study demonstrates that carotid ligation in the CD1 mouse on P12 causes acute electrographic rhythmic discharges that correlate with behavioral seizures. We also found that the age at which ligation is performed and genetic strain have a strong influence on the severity of injury.
Cost-Effective Addition of High-Throughput Colony Picking Capability to a Standard Liquid-Handling Platform
Authors: Hartley Todd , Stewart Claudia , Stewart Robin , Munroe David J. 
Published: December 2008

We have developed a general strategy for the addition of high-throughput colony picking capability to most standard liquid-handling robotic platform. This strategy is easily implemented and requires minimal capital outlay (less than $2500.00). To illustrate this strategy, we describe the modification of a Caliper Life Sciences Sciclone ALH (Automated Liquid Handler) 3000 together with a general calibration methodology that can be applied to most liquid-handling robot capable of X, Y, Z positioning. This project has been funded in whole or in part with federal funds from the National Cancer Institute, National Institutes of Health, under contract N01-CO-12400. The content of this publication does not necessarily reflect the views or policies of the Department of Health and Human Services, nor does mention of trade names, commercial products, or organizations imply endorsement by the U.S. Government.
Dementia literacy: Recognition and beliefs on dementia of the Australian public
Authors: Low Lee‐Fay , Anstey Kaarin Jane 
Published: December 2008

BackgroundDementia is a growing health problem worldwide and in Australia. Little research has been conducted on dementia literacy in the community.MethodsThe aim of this study was to investigate the recognition of dementia and beliefs regarding prognosis, cause, and risk reduction in the Australian public. A cross‐sectional telephone survey of 2,000 randomly selected community‐dwelling adults (23.4% response rate) was conducted.ResultsEighty‐two percent of the sample correctly identified “dementia” or “Alzheimer's” from a vignette. There were no differences in recognition rates between vignettes describing mild or moderate dementia symptoms. Almost half thought that at least partial recovery would occur, given appropriate treatment. More than 80% of the sample thought that genetics, old age, brain disease, and stroke or mini‐stroke contributed to a person getting dementia. Seventy‐two percent thought that the risk of dementia could be reduced. The most frequently suggested methods for risk reduction were mental exercise (38.8%), eating healthily (31.0%), physical exercise (30.2%), and socializing more (13.9%). Sociodemographic characteristics were associated with dementia knowledge and beliefs.ConclusionsThe majority of the Australian public recognize the symptoms of dementia and think dementia risk can be reduced. However, most do not know of the association between dementia and cardiovascular factors. Public awareness campaigns need to increase accurate knowledge of factors consistently found to be associated with dementia.
Physician outpatient contacts and hospitalizations among cognitively impaired elderly
Authors: Caspi Eilon , Silverstein Nina M. , Porell Frank , Kwan Ngai 
Published: December 2008

BackgroundThis study examined how physician contacts and hospitalizations vary in relation to cognitive function level among community‐residing older adults.MethodsAnalysis of the 1998 wave of the Health and Retirement Survey (HRS) was conducted to create three levels of cognitive function among 6,991 older adults by using direct measures for self‐respondents and proxy evaluations. Ordinary least square regression analyses were used to estimate the probability of physician outpatient contacts, number of hospitalizations, and nights hospitalized during the last 2 years.ResultsLower cognitive function level was found to be associated with decreasing levels of physician contacts and increasing levels of hospitalizations as well as nights hospitalized. In addition, lower cognitive function levels were consistently related to a variety of comorbidities. Moreover, many older adults with low cognitive function levels reported or were reported by their proxies as not having a diagnosis of a memory‐related disease (MRD). Finally, having a diagnosis of an MRD was found to be associated with more physician contacts but fewer hospital nights compared with those who had never received such a diagnosis.ConclusionsThe findings suggest the need for increased outreach targeted at identification of community‐dwelling older adults with decline in cognitive function who are in need of care but are underdiagnosed, underutilize physician care, and are overhospitalized.