bluuebunny/crossref_metadata_2025_split huggingface dataset:
Isomeric Preference in Complexes of Palladium(II) with Chelating P,N‐Donor Ligands
Authors: del Campo Olga , Carbayo Arancha , Cuevas José V. , García‐Herbosa Gabriel , Muñoz Asunción 
Published: April 2009

AbstractSquare‐planar complexes [PdCl{κ2‐(RN = CHC6H4PPh2)R′}] (R′ = Cl; R = 4‐CH3C6H4, 1a; R = 2‐CH3OC6H4, 1b; R = 2‐HOC6H4, 1c; R′ = CH3; R = 4‐CH3C6H4, 2a; R = 2‐CH3OC6H4, 2b; R = 2‐HOC6H4, 2c) have been prepared and characterized. In complexes 2a–c only formation of one isomer was observed. The Pd–methyl bond arranges in a cis position to the phosphane fragment of the P,N chelating ligand. Reaction of complexes 2a–c in acetonitrile with AgBF4 led to removal of the chlorido ligand and coordination of acetonitrile for 2a. However, for 2b and 2c coordination of the oxygen was observed and the chelating P,N ligands became tricoordinate. DFT calculations developed on models of the complexes displayed that the isomer with the methyl ligand coordinated in the cis position to the phosphane ligand were harder (or had a bigger HOMO/LUMO gap)(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Structures, Redox and Spectroscopic Properties of PdII and PtII Complexes Containing an Azo Functionality
Authors: Roy Sayak , Hartenbach Ingo , Sarkar Biprajit 
Published: April 2009

AbstractThe complexes [PdCl2(pap)] (1) and [PtCl2(pap)] (2; pap = 2‐phenylazopyridine) were synthesized by treating PdCl2 or K2PtCl4, respectively, with pap and characterized by 1H NMR spectroscopy and elemental analysis. Both these complexes, together with the previously reported complex [(az)Pd(μ‐Cl)2Pd(az)] (3; az = azobenzene), were also characterized by X‐ray crystallography. The structures of 1, 2, and 3 show a slightly elongated N–N azo double bond due to back‐donation from the metal centers and a twisting of the uncoordinated part of the ligands with respect to the rest of the molecule. Cyclic voltammetry of 1, 2, 3, and the related complex [(az)Pt(μ‐Cl)2Pt(az)] (4) shows reduction processes which are reversible for 1 and 2 but irreversible for 3 and 4. The first reduction of 1 and 2 leads to radical complexes, and EPR spectroscopy shows the spin to be predominantly located on the azo part of the complexes. The radical complex 2·– shows an unprecedented 195Pt hyperfine coupling constant and g anisotropy for such PtII radical species. The UV/Vis spectroscopy results for all the complexes are also discussed.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Syntheses, Crystal Structures and Adsorption Properties of Ultramicroporous Coordination Polymers Constructed from Hexafluorosilicate Ions and Pyrazine
Authors: Uemura Kazuhiro , Maeda Akihisa , Maji Tapas Kumar , Kanoo Prakash , Kita Hidetoshi 
Published: April 2009

AbstractThree novel coordination polymers based on M2+ (M = Cu, Zn), pyrazine (pyz) and the SiF62– ion, [Cu(SiF6)(pyz)(H2O)2]n (1a), {[Cu(SiF6)(pyz)3]·2H2O}n (1b blabla 2H2O) and {[Zn(SiF6)(pyz)2]·2MeOH}n (2 blabla 2MeOH), have been synthesized and characterized by single‐crystal X‐ray diffraction analyses. Compound 1a forms straight one‐dimensional chains of–Cu(OH2)2–pyz–, which are bridged by SiF62– ions to produce two‐dimensional sheets. Compound 1b blabla 2H2O forms straight two‐dimensional sheets of –Cu(pyz)2–pyz– chains bridged by SiF62– ions, where perpendicularly protruding pyz planes are stacked to produce a three‐dimensional framework with 2.5 × 2.2 Å2 pores. In compound 2 blabla 2MeOH, grids of [Zn(pyz)2]n are bridged by SiF62– ions axially coordinating to Zn2+ ions to produce an open three‐dimensional framework. The 4.5 × 4.5 Å2 pores in 2 blabla 2MeOH are surrounded by pyz panels, and they remain intact after removal of solvents to give [Zn(SiF6)(pyz)2]n (2). The permanent porosity of 2 was characterized by adsorption studies with solvent vapours such as MeOH (kinetic diameter 3.8 Å), EtOH (4.3 Å), iPrOH (4.7 Å) and Me2CO (4.7 Å), showing a size‐exclusive effect at around 4.7 Å. Furthermore, the H2 adsorption/desorption isotherm of 2 at 77 K shows a sharp uptake with a slight hysteresis loop, which is attributed to both the small size of the pore and the interaction between H2 molecules and fluorine (SiF62–) atoms that are exposed on the pore surfaces. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Brønsted Acid or Solid Acid Catalyzed Aza‐Diels–Alder Reactions of Methylenecyclopropanes with Ethyl (Arylimino)acetates
Authors: Zhu Zhi‐Bin , Shao Li‐Xiong , Shi Min 
Published: April 2009

AbstractBrønsted acid (TfOH) or solid acid (montmorillonite K‐10) catalyzed aza‐Diels–Alder reactions of methylenecyclopropanes with ethyl (arylimino)acetates were shown for the construction of the tetrahydroquinoline skeleton with the untouched cyclopropyl group in the 3,3′‐position. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Geomorphological evidence towards a de‐glacial control on volcanism
Authors: Carrivick Jonathan L. , Russell Andrew J. , Rushmer E. Lucy , Tweed Fiona S. , Marren Phillip M. , Deeming Hugh , Lowe Oliver J. 
Published: April 2009

AbstractA number of theoretical, conceptual and numerical models exist for de‐glacial controls on volcanism, but geological evidence is scarce. We describe and explain a regional topographic and geomorphic expression of sub‐glacial volcanism, namely that at Kverkfjöll, Iceland. This area comprises a series of parallel sub‐glacially‐erupted volcanic edifices, which together give excellent 3D geological exposure. These ridges are orientated north‐south or along the most probable line of LGM ice margin retreat. We combine topographic and geomorphic observations to explain the changing style of volcanism in space, and attribute this to the recession and downwasting of the LGM ice sheet. Specifically, we observe that there is no spatial pattern to pillow lava edifice heights or volumes, indicating that fissure eruptions beneath the LGM ice sheet were of similar dynamics in space. However, hyaloclastite and hyalotuff deposits are restricted to proximal and high elevation positions. Furthermore, lithofacies are split by erosional contacts and hyalotuffs are faulted and intruded. These observations together suggest that as the overlying ice sheet became thinner volcanic activity became more explosive. Volcanic activity also appears to have ‘retreated’ towards the Kverkfjöll central volcano. Glacial outburst floods or ‘jökulhlaups’ were prevalent during de‐glaciation, partly because sub‐glacial meltwater could not be impounded due to the high gradient bedrock topography. For northern Iceland, our proposed sequence of landscape development suggests two major glacial advances during the Holocene, at least one of which at Kverkfjöll probably coincided with volcanic activity and a jökulhlaup. Future work should look to establish an absolute dating control and/or chronology. Copyright © 2009 John Wiley & Sons, Ltd.
The role of stem cell transplantation in the management of chronic lymphocytic leukaemia
Authors: Tam Constantine S. , Khouri Issa 
Published: April 2009

AbstractThe majority of patients diagnosed with chronic lymphocytic leukaemia (CLL) will ultimately die of their disease. Stem cell transplantation (SCT) remains the only treatment modality capable of cure, but has traditionally been associated with very high morbidity and mortality. We review the results of myeloablative autologous and allogeneic SCT in CLL, discuss the evolution of the new non‐myeloablative approaches, and make recommendations for when SCT should be considered in patients with CLL. Copyright © 2009 John Wiley & Sons, Ltd.
Biocompatibility of surfactant‐templated polyurea–nanoencapsulated macroporous silica aerogels with plasma platelets and endothelial cells
Authors: Yin Wei , Venkitachalam Subramaniam M. , Jarrett Ellen , Staggs Sarah , Leventis Nicholas , Lu Hongbing , Rubenstein David A. 
Published: April 2009

AbstractThe recently synthesized polyurea‐nanoencapsulated surfactant‐templated aerogels (X‐aerogels) are porous materials with significantly improved mechanical strengths. Surface‐wise they resemble polyurethane, a common biocompatible material, but their biocompatibility has never been investigated. As lightweight and strong materials, if X‐aerogels also have acceptable biocompatibility, they may be used in many implantable devices. The goal of this study was to investigate their biocompatibility toward platelets, blood plasma, and vascular endothelial cells, in terms of cell activation and inflammatory responses. Platelets were incubated with X‐aerogel and platelet activation was measured through CD62P and phosphatidylserine expression. Platelet aggregation was also measured. Contact with X‐aerogel did not induce platelet activation or impair aggregation. To determine X‐aerogel‐induced inflammation, plasma anaphylatoxin C3a level was measured after incubation with X‐aerogel. Results showed that X‐aerogel induced no changes in plasma C3a levels. SEM and SDS–PAGE were used to examine cellular/protein deposition on X‐aerogel samples after plasma incubation. No structural change or organic deposition was detected. Furthermore, X‐aerogel samples did not induce any significant changes in vascular endothelial cell culture parameters after 5 days of incubation. These observations suggest that X‐aerogels have a suitable biocompatibility toward platelets, plasma, and vascular endothelial cells, and they have potential for use in blood implantable devices. © 2009 Wiley Periodicals, Inc. J Biomed Mater Res, 2010
Response of mid‐latitude North Pacific surface temperatures to orbital forcing and linkage to the East Asian summer monsoon and tropical ocean–atmosphere interactions
Authors: Yamamoto Masanobu 
Published: April 2009

AbstractWe present a palaeoceanographic perspective of the North Pacific during the last two glacial cycles based on U‐derived palaeotemperature records of IMAGES Core MD01‐2421 off the coast of central Japan and cores from the Ocean Drilling Program (ODP) Sites 1014 and 1016 off the coast of California. The sea surface temperature (SST) differences between ODP Sites 1014 and 1016 (ΔSSTnortheastern Pacific (NEP) = SSTODP1014 – SSTODP1016) indicate the intensity of the California Current. Comparison of ΔSSTNEP and the SST from Core MD01‐2421 revealed anti‐phase variation; high ΔSSTNEP (indicating weakening of the California Current) corresponded to low SST at the Japan margin (indicating the southward displacement of the north‐western Pacific subarctic boundary and weakening of the Kuroshio Extension), and vice versa. This finding suggests that the intensity of the North Pacific subtropical gyre circulation has varied in response to precessional forcing and that this response has been linked with changes in tropical ocean–atmosphere interactions. In the precessional cycle, the SST variation derived from Core MD01‐2421 lags ca. 2.5–4 ka behind the variations shown by Hulu and Sanbao stalagmite δ18O records and by the pollen temperature index from Core MD01‐2421, suggesting out‐of‐phase variations of the North Pacific subtropical gyre circulation and the East Asian summer monsoon. These findings indicate that the behaviour of interactions between tropical ocean–atmosphere dynamics and the East Asian summer monsoon may have varied in response to the precessional cycle. Copyright © 2009 John Wiley & Sons, Ltd.
Heterodyne single‐beam CARS microscopy
Authors: Müller Christina , Buckup Tiago , von Vacano Bernhard , Motzkus Marcus 
Published: April 2009

AbstractIn single‐beam coherent anti‐Stokes Raman spectroscopy (CARS), a complete four‐wave‐mixing scheme is accomplished within a single pulse from an ultrashort femtosecond oscillator. Spectral information is achieved by coherent control of the non‐linear signal generation using phase modulation of the excitation with a pulse shaper. This single‐beam approach can be even extended to heterodyne detections schemes wherein a strong local oscillator (LO) field, also generated by pulse shaping from the same excitation laser, interferes with the CARS signal. Here, we explore the potential of this promising technique. A careful optimisation of the experimental scheme is presented together with an analysis of the different relations between LO field and CARS signal intensity, discovering an optimal LO field at a fraction of about 10−4 compared to the overall CARS excitation energy. With the optimised set‐up, an absolute number of molecules as low as 5 × 106 corresponding to concentrations in the attomole regime in the focal volume can be detected. Using such an optimal parameterisation, heterodyne single‐beam CARS based on a broadband laser source is introduced to microscopic applications, combining chemical selectivity and a high spatial resolution of the non‐linear CARS process with the sensitivity of the heterodyne approach. Copyright © 2009 John Wiley & Sons, Ltd.
Polarization Raman study of protein ordering by controllable RBC deformation
Authors: Rao Satish , Bálint Štefan , del Carmen Frias Luisa , Petrov Dmitri 
Published: April 2009

AbstractPolarized Raman spectroscopy is used to provide evidence of hemoglobin protein ordering as the red blood cell (RBC) is stretched with optical tweezers. The stretching of the cell is intended to mimic the deformation that it experiences as it travels through vessels and capillaries. The depolarization ratios for a number of heme Raman bands change as the cell is stretched, confirming the semi‐ordered nature of the hemoglobin ensemble in the cytoplasm. Furthermore, trends observed in the ratio shifts point to increased packing and ordering of the Hb after cell stretching. This evidence should shed more light on to the role of deformation in the RBC function. Copyright © 2009 John Wiley & Sons, Ltd.
FT‐IR and FT‐Raman spectra and ab initio calculations of 3‐{[(2‐hydroxyphenyl) methylene]amino}‐2‐phenylquinazolin‐4(3H)‐one
Authors: Yohannan Panicker C. , Varghese Hema Tresa , Ambujakshan K.R. , Mathew Samuel , Ganguli Subarna , Nanda Ashis Kumar , Alsenoy Christian Van 
Published: April 2009

AbstractFourier transform infrared (FT‐IR) and Fourier transform (FT) Raman spectra of 3‐{[(2‐hydroxyphenyl)methylene]amino}‐2‐phenylquinazolin‐4(3H)‐one were recorded and analyzed. The vibrational wavenumbers of the title compound were computed using HF/6‐31G* and 6‐311G* basis sets and compared with experimental data. The assignments of the normal modes are done by potential energy distribution (PED)calculations. The prepared compound was identified by nuclear magnetic resonance (NMR) and mass spectra. Optimized geometrical parameters of the title compound are in agreement with reported structures. Shortening of CN bond lengths reveal the effect of resonance. The simultaneous IR and Raman activations of the CO stretching mode shows a charge transfer interaction through a π‐conjugated path. The first hyperpolarizability, infrared intensities and Raman activities are reported. The phenyl CC stretching modes are equally active as strong bands in both IR and Raman spectra, which are responsible for hyperpolarizability enhancement leading to nonlinear optical activity. Copyright © 2009 John Wiley & Sons, Ltd.
Audiometric, surgical, and genetic findings in 15 ears of patients with osteogenesis imperfecta
Authors: Swinnen Freya K.R. , De Leenheer Els M.R. , Coucke Paul J. , Cremers Cor W. R. J. , Dhooge Ingeborg J. M. 
Published: April 2009

AbstractObjectives/Hypothesis:To provide data on the outcome of stapes surgery in patients with osteogenesis imperfecta (OI). The audiometric results of 15 ears (12 patients), in which a stapes operation was performed, are presented and compared with results from literature.Study Design:Retrospective study.Methods:In 12 patients with genetically confirmed OI, intraoperative findings and audiometric evaluations were recorded.Results:In all patients the genetic mutation was located in the COL1A1 gene. Surgical findings in OI may be particular like mobile, atrophic stapes crura combined with a fixation of the stapes footplate, which may be thickened, and a hypervascularized or thickened middle‐ear mucosa. Outcome for hearing in 13 primary surgered ears was good because at short‐term follow‐up the air‐bone gap was reduced in all cases. These results were maintained in the long‐term, with exception of one ear, in which progression of the sensorineural component occurred shortly after the operation. Although initial success was noted in two ears with revision surgery, in the long term this was only maintained in one of them.Conclusions:In general, stapes surgery is successful in resolving the conductive hearing loss in OI patients, even in the long term. Hearing loss in OI is mostly of the mixed type, and the sensorineural component is reported to be progressive. Stapedotomy, by improving the hearing level, may facilitate the rehabilitation with a hearing aid. Because the identified mutation could be located in the COL1A1 gene in all patients, conductive hearing loss in OI caused by stapes fixation is possibly linked to a mutation in this gene. Laryngoscope, 2009
A coated electrode carrier for cochlear implantation reduces insertion forces
Authors: Radeloff Andreas , Unkelbach Marc H. , Mack Martin G. , Settevendemie Claudia , Helbig Silke , Mueller Joachim , Hagen Rudolf , Mlynski Robert 
Published: April 2009

AbstractObjectives/Hypothesis:To assess the insertion forces and feasibility of insertion of a prototype electrode carrier coated with a flexible and biodegradable coating developed for lubrication and drug delivery.Study Design:Experimental study.Methods:Eight coated and eight uncoated electrode carriers were inserted into a scala tympani model by means of an insertion device, and forces produced during insertion were determined in near real time. The maximum insertion depths and insertion angle were determined. To test the handling and operability, five coated electrode carriers were implanted into human temporal bones. Additionally, the bones were processed undecalcified and the distribution of the coating material within the cochlea evaluated.Results:Insertion forces were markedly reduced in the group of coated electrode carriers for insertion depths above 15 mm. The insertions were less fitful and led to a higher maximum insertion angle. The insertion of the coated electrode carrier was feasible, and the coating material was evident up to the apical parts of the cochlea postimplantation.Conclusions:Coating of a cochlear implant electrode carrier may reduce insertion forces responsible for the surgical trauma. Loaded with active substances, the coating may help to deliver drugs to the apical parts of the cochlear where hair cells reside in patients with residual hearing. Laryngoscope, 2009
Assessment of functioning in patients with head and neck cancer according to the International Classification of Functioning, Disability, and Health (ICF): A multicenter study
Authors: Tschiesner Uta , Linseisen Elisabeth , Baumann Sebastian , Siedek Vanessa , Stelter Klaus , Berghaus Alexander , Cieza Alarcos 
Published: April 2009

AbstractObjectives:To assess the level of functioning in patients with head and neck cancer (HNC) using the the International Classification of Functioning, Disability, and Health (ICF).Methods:Multicenter study at nine different study centers in four European countries. Data collection included structured interviews according to the extended ICF checklist with 145 HNC patients and completion of the European Organization for Research and Treatment of Cancer ‐ Quality of Life Questionnaires (EORTC‐QLQ). The generic ICF checklist was extended by additional HNC‐specific categories identified in six HNC‐specific questionnaires: EORTC, University of Washington Quality of Life (UW‐QOL), Functional Assessment of Cancer Therapy scale (FACT), Performance Status Scale for Head and Neck cancer patients (PSS‐HN), Head and Neck Quality of Life instrument (HN‐QOL), and Voice Handicap Index (VHI). The ICF qualifier system was applied on a scale from 0 (not impaired) to 4 (completely impaired), as well as “ns, na” (not specified, not applicable) and “c” (impaired due to comorbidity). ICF categories impaired due to HNC (1–4) in ≥10% of patients were reported.Results:One hundred fifteen (80%) of 144 categories of the extended ICF checklist were identified to be at least mildly impaired or restricted in ≥10% of patients. The four areas that were relevant to most of the patients were “immediate family” (91%), “friends” (86%), “health services and policies” (85%) and “health professionals” (85%), all belonging to the ICF component of environmental factors. The most often identified categories were “ingestion” (75%) for body functions and “speaking” (76%) for activities and participation. The summary score of all answers correlated well with the overall level of health and quality of life as assessed in the EORTC questionnaires (0.59, 0.61, respectively).Conclusions:The ICF identifies problems in functioning in patients with HNC comprehensively. The results emphasize the importance of contextual environmental factors. In particular, environmental factors referring to interpersonal support should be more strongly included in rehabilitation plans for HNC. Laryngoscope, 2009
Neural control of eustachian tube function
Authors: Songu Murat , Aslan Asim , Unlu H. Halis , Celik Onur 
Published: April 2009

AbstractObjectives/Hypothesis:It has been hypothesized that middle ear pressure can be controlled by the Eustachian tube through a neuronal reflex arc in animal models. We aimed to define the role of the neuronal control mechanisms in regulating middle ear pressure in humans.Study Design:Prospective study.Methods:The study population consisted of 95 ears of 95 volunteers. The mechanoreceptors on the tympanic membrane and the baroreceptors in the middle ear, which are assumed to form the afferent plexus of the neuronal reflex arc, were blocked by topical administration of lidocaine hydrochloride, in various patient groups. The Eustachian tube functions forming the efferent plexus of the neuronal reflex arc were evaluated by manometric tests both before and after blocking the possible afferent plexus in each study group.Results:The baroreceptors established in the tympanic plexus might possibly have an effective role in this mechanism where the mechanoreceptors on the tympanic membrane seem to have a minor effect.Conclusions:Neuronal control mechanism could play an important role in regulating Eustachian tube function in humans. Laryngoscope, 2009
Logarithmically improved regularity criteria for Navier–Stokes and related equations
Authors: Fan Jishan , Ozawa Tohru 
Published: April 2009

AbstractWe use an interpolation inequality on Besov spaces to show some logarithmically improved regularity criteria for Navier–Stokes equations, the harmonic heat flow, the Landau–Lifshitz equations, and the Landau–Lifshitz–Maxwell system. Copyright © 2009 John Wiley & Sons, Ltd.