bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dynamics of Invertebrate Benthic Communities and Drift in a Regulated River of Central Spain
Authors: Boyero Luz , Valladolid María , Arauzo Mercedes 
Published: July 2005

AbstractWe document invertebrate benthic and drift dynamics in a regulated river in central Spain at two temporal scales: seasonal (for both benthos and drift) and daily (for drift). The benthic abundance of individuals and taxon richness generally increased in the summer. Drift abundance showed no seasonal or daily variation, but taxon richness of drifting individuals was higher in the spring. Both ben‐thos and drift showed clear seasonal changes in taxonomic composition. Interestingly, some benthic taxa showed their highest abundances in the spring, while others were more abundant in the summer. In contrast, most drifting taxa were more abundant in the spring. Different functional feeding groups showed different patterns of variation throughout the year, both in the benthos and the drift. Daily variations in drift were present in very few taxa and functional feeding groups, and only in some seasons. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Development of a Fish Based Lake Typology for Natural Austrian Lakes >50 ha Based on the Reconstructed Historical Fish Communities
Authors: Gassner Hubert , Wanzenböck Josef , Zick Daniela , Tischler Gerhard , Pamminger‐Lahnsteiner Barbara 
Published: July 2005

AbstractBased on the reconstructed native fish communities all natural Austrian lakes >50 ha (n = 43) were classified into four groups using cluster analysis methods. Sentinel species (i.e. species with highest discriminating value for lake types and characteristic for a specific lake group) and type specific fish species (accompanying species with additional value for characterising lake groups) were defined by a newly developed index and by similarity analysis. The first group included 16 lakes of high altitude, small surface area and low fish species number with arctic char as a sentinel species. The second group (n = 10) was characterized by intermediate altitude, large surface area and high maximum water depth with the minnow as sentinel species. The third group contained 14 lakes with low maximum water depths and a long retention time. For this group the bleak was found as a sentinel species. The lakes of the eastern part of Austria represented the last group (n = 3) and were characterized by low altitude and very shallow water depth with pike‐perch as a sentinel species. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Long‐term evaluation of porous poly(ϵ‐caprolactone‐co‐L‐lactide) as a bone‐filling material
Authors: Holmbom Johanna , Södergård Anders , Ekholm Erika , Märtson Matis , Kuusilehto Asko , Saukko Pekka , Penttinen Risto 
Published: July 2005

AbstractPorous poly(ϵ‐caprolactone‐co‐L‐lactide) (P(CL‐co‐LA, wt % ca. 5/95) sponges were prepared, coated biomimetically with CaP/apatite, and implanted with noncoated control sponges into rat femur cortical defects and dorsal subcutaneous space. The implants were inspected histologically at 2, 4, and 33 weeks after the operation. All implants were filled with fibrovascular tissue within 4 weeks. The femur implants were partially ossified with compact bone, which in the CaP‐coated sponges was less mature and more fragmented. Approximately equal amounts of bone were observed in both types of implants. The polymer induced a mild inflammatory reaction with foreign body giant cells but no accumulation of fluid. Degradation of the polymer was slow; most of it was found intact at 33 weeks in histological samples. Nondegraded polymer seems to prevent complete ossification. Cultured osteoblasts proliferated well on apatite‐coated material, whereas only a few cells were seen on noncoated material. Thus CaP/apatite coating helped the attachment of osteoblasts in cell cultures but did not offer any advantage in bone formation over noncoated material in vivo. We conclude that a shorter degradation time of P(CL‐co‐LA) is needed to create an optimal implant. Furthermore, in vivo experiments seem to be necessary for the estimation of osteopromotive properties of a biomaterial. © 2005 Wiley Periodicals, Inc. J Biomed Mater Res, 2005
Laboratory‐ and pilot plant‐scale study on the dehydration of cyclohexane by pervaporation
Authors: Ortiz Inmaculada , Urtiaga Ane , Ibáñez Raquel , Gómez Pedro , Gorri Daniel 
Published: July 2005

AbstractIn this work, pervaporation is applied for the dehydration of industrial cyclohexane, used as a solvent and reaction medium in the manufacture of synthetic rubbers. Working with initial concentrations of water in cyclohexane within the range of 0.090–0.110 kg m−3, an experimental study was performed (i) in the laboratory, using a radial cell with a membrane area of 0.0178 m2; and (ii) in a pilot plant located at the industrial site, with a plate‐and‐frame membrane module and a total membrane area of 3 m2. In both cases, the same pervaporation membrane, with a preferential flux of water, was used. The mass transfer coefficient was determined, together with its dependence on the hydrodynamic regime. The higher hydraulic resistance of the plate‐and‐frame module generated a pressure decrease that limited the feed velocity, thus increasing the mass transfer resistance of the pervaporation process in comparison with the bench‐scale system. Copyright © 2005 Society of Chemical Industry
A novel binary adenovirus‐based dual‐regulated expression system for independent transcription control of two different transgenes
Authors: Gonzalez‐Nicolini Valeria , Fussenegger Martin 
Published: July 2005

AbstractBackgroundStringent multitransgene control is a prerequisite for future gene‐therapy and tissue‐engineering scenarios and requires constant improvements in design to achieve optimal conditional transcription profiles.MethodsWe have pioneered a variety of recombinant adenoviruses which (i) enable streptogramin‐responsive transgene transduction in a compact autoregulated one‐virus format, (ii) manage independent streptogramin‐ and tetracycline‐responsive control of two different transgenes from a single divergent expression unit, and (iii) control sense and antisense expression of the human cyclin‐dependent kinase inhibitor p27Kip1 to engineer conditional positive (enforced S‐phase entry, p27Kip1‐antisense expression) or negative (G1‐phase‐specific growth arrest, p27Kip1‐sense expression) growth control in mammalian cell lines and human primary cells.ResultsThe transgene control performance of all adenoviral expression configurations has been rigorously optimized for tight, balanced and maximum expression levels and was validated for intracellular as well as for secreted product in a variety of biotechnologically relevant cell lines (Chinese hamster ovary cells [CHO‐K1], baby hamster kidney cells [BHK‐21]) as well as in human cell lines (human fibrosarcoma cells [HT‐1080]) and primary cells (human aortic fibroblasts [HAFs]).ConclusionsWe believe that multiregulated multigene‐controlled adenoviruses are important assets for successful therapeutic reprogramming of mammalian cells in clinically relevant scenarios. Copyright © 2005 John Wiley & Sons, Ltd.
A proteomic study of the HUPO Plasma Proteome Project's pilot samples using an accurate mass and time tag strategy
Authors: Adkins Joshua N. , Monroe Matthew E. , Auberry Kenneth J. , Shen Yufeng , Jacobs Jon M. , Camp David G. , Vitzthum Frank , Rodland Karin D. , Zangar Richard C. , Smith Richard D. , Pounds Joel G. 
Published: July 2005

AbstractCharacterization of the human blood plasma proteome is critical to the discovery of routinely useful clinical biomarkers. We used an accurate mass and time (AMT) tag strategy with high‐resolution mass accuracy cLC‐FT‐ICR MS to perform a global proteomic analysis of pilot study samples as part of the HUPO Plasma Proteome Project. HUPO reference serum and citrated plasma samples from African Americans, Asian Americans, and Caucasian Americans were analyzed, in addition to a Pacific Northwest National Laboratory reference serum and plasma. The AMT tag strategy allowed us to leverage two previously published “shotgun” proteomics experiments to perform global analyses on these samples in triplicate in less than 4 days total analysis time. A total of 722 (22% with multiple peptide identifications) International Protein Index redundant proteins, or 377 protein families by ProteinProphet, were identified over the six individual HUPO serum and plasma samples. The samples yielded a similar number of identified redundant proteins in the plasma samples (average 446 ± 23) as found in the serum samples (average 440 ± 20). These proteins were identified by an average of 956 ± 35 unique peptides in plasma and 930 ± 11 unique peptides in serum. In addition to this high‐throughput analysis, the AMT tag approach was used with a Z‐score normalization to compare relative protein abundances. This analysis highlighted both known differences in serum and citrated plasma such as fibrinogens, and reproducible differences in peptide abundances from proteins such as soluble activin receptor‐like kinase 7b and glycoprotein m6b. The AMT tag strategy not only improved our sample throughput but also provided a basis for estimated quantitation.
Anionic homo‐ and copolymerization of double‐tailed macromonomers: A route to novel macromolecular architectures
Authors: Driva Paraskevi , Iatrou Hermis , Lohse David J. , Hadjichristidis Nikos 
Published: July 2005

AbstractThe synthesis of model linear and star double‐comb polybutadienes, as well as molecular double‐brush polybutadienes, with two tails emanating from each branch point, is presented. The synthetic approach involves (1) the selective reaction of living polybutadienes with the two chlorines of 4‐(dichloromethylsilyl)styrene to make double‐tailed macromonomers and (2) the homopolymerization or copolymerization of the double‐tailed macromonomer, in situ without isolation, to produce the double brushes and double combs, respectively. The star double comb was synthesized by the reaction of living double‐comb polybutadiene with trichloromethylsilane. Characterization carried out by size exclusion chromatography, with differential refractometer and light scattering detectors, indicated that the synthesized polybutadienes had a high degree of molecular and structural homogeneity. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 4070–4078, 2005
Hydrogenation and oxygenation of the (100) diamond surface and the consequences for transfer doping
Authors: Sque S. J. , Jones R. , Briddon P. R. 
Published: July 2005

AbstractAb initio density‐functional‐theory calculations have been performed to determine the structural and electronic properties of the (100) diamond surface with various hydrogen and oxygen terminations. Total energies indicate that an –OH‐terminated surface is favoured over an oxygenated surface plus gas‐phase hydrogen. Ionisation potentials and electron affinities (EAs) are reported for the different systems, and the distinction is made between bulk‐ and surface‐related properties. A first‐order correction is used to offer estimated surface EAs. A negative bulk EA is found for surfaces terminated with –H and –OH groups, although many surfaces have deep traps which can act as positive EA in the absence of band bending. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
BEN‐HFCVD effects on diamond nucleation on iridium: a Raman imaging study
Authors: Arnault J. C. , Schull G. , Mermoux M. , Marcus B. , Crisci A. , Polini R. 
Published: July 2005

AbstractDiamond crystallites grown on Ir/SrTiO3 substrates after a bias‐enhanced nucleation procedure in a hot filament reactor have been studied using Raman spectroscopy. In particular, two techniques, Raman imaging and Raman mapping have been employed, and some of their relative merits for the detection of small diamond particles are presented. Part of the present results tend to indicate that the bias‐enhanced nucleation process in hot filament reactors differs significantly from the corresponding one in microwave plasma reactors. In particular, a thin layer of graphitic carbon is systematically detected at the iridium surface. It is speculated that the presence of this layer prevents the oriented nucleation and growth of the diamond crystallites. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Observation of new defect levels in nanodiamond membranes
Authors: Kravets R. , Johnston K. , Potmesil J. , Vorlicek V. , Rosa J. , Vaněček M. 
Published: July 2005

AbstractThis paper reports on a new set of defect features in thin membrane nanodiamond. The samples were stud‐ied using Fourier transform photocurrent spectroscopy. We have observed four dominant new peaks in nanocrystalline diamond: two sharp peaks at 0.36 and 0.40 eV and broad bands at 0.27 and 0.57 eV. The first of these peaks is suggested to originate from a currently unknown bulk impurity; the other three are surface‐related and are especially prone to surface effects such as absorption/desorption over time. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Non‐equilibrium acoustic phonons in nanocrystalline ceramics based on C‐modification of Y2O3 sesquioxide
Authors: Ivanov S. N. , Barabanenkov Yu. N. , Taranov A. V. , Khazanov E. N. , Yagi H. , Yanagitani T. , Takaichi K. , Lu J. , Bisson J. F. , Shirakava A. , Ueda K. , Bagayev S. N. , Kaminskii A. A. 
Published: July 2005

AbstractThe transport processes in highly transparent nanocrystalline laser‐host ceramics based on C‐modification of Y2O3 sesquioxide were investigated by the heat‐pulse technique. The propagation kinetics of acoustic phonons was studied in the range of liquid helium temperature (1.7–3.8 K). A structural model for the grain boundary layers is suggested and their thickness is estimated. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Critical misfit for dislocation stability in self‐assembled islands
Authors: Denker U. , Jesson D. E. 
Published: July 2005

AbstractThe energy of a dislocation within a coherently strained nanostructure is calculated as a function of misfit and position. If the misfit is decreased below a critical value, no energetically stable position for the dislocations exists inside the island. This instability is understood in terms of a simple two‐dimensional model and we propose that this can lead to motion of the nanostructure across the surface by a novel crawl mechanism. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Range and longitudinal range straggling with various stopping power formulations for oxygen ions in Si and SiO2
Authors: Kabadayi Önder , Gümüş Hasan 
Published: July 2005

AbstractThe results on comparison of different energy‐loss formulations as well as calculations of the range and range straggling have been presented for the ion–target system where oxygen ions are incident on amorphous silicon and silicon dioxide targets. Applying stopping‐power expressions by Montenegro et al., Öztürk et al., Wang and He, and Gümüş and Köksal, we have numerically calculated range and range straggling within a transport‐theory formalism. An interesting result is that the Montenegro et al. formula produces results better than its corrected version; the Öztürk et al. relation, despite the range and range straggling calculations indicating that the produced results by using the Öztürk et al. formulation are better than the Montenegro et al. formula when compared with experiment. The results with respect to the range straggling of oxygen ions in silicon dioxide show that the deviation from the experiment for the Öztürk et al. formulation is 42% at 200 keV, being the smallest deviation among the SRIM program and the other techniques. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
M and 1H NMR, ionic motions and phase transitions in proton conducting MHSO4 (M = K, Rb, Cs, and NH4) single crystals
Authors: Lim Ae Ran , Lim Kye‐Young 
Published: July 2005

AbstractThe M and 1H spin–lattice relaxation rates in MHSO4 (M = K, Rb, Cs, and NH4) single crystals were measured over a wide temperature range. The temperature dependences of the 1H spin–lattice relaxation rates in RbHSO4 and NH4HSO4 can be explained by using the Bloembergen–Purcell–Pound theory while the temperature dependence of the 1H spin–lattice relaxation rate in KHSO4 cannot. Also, the relaxation process for M in MHSO4 crystals differs depending on M. It is well known that the characteristic features of MHSO4 crystals depend on whether M is K, Rb, Cs or NH4; specifically, NH4HSO4 and RbHSO4 exhibit ferroelectricity but KHSO4 and CsHSO4 do not. Consequently, although the MHSO4 crystals considered here are all members of the alkali acid sulfate family, our relaxation rate results varied depending on the mechanism of the ionic motion. This suggests that the differences in the chemical properties of M (= K, Rb, Cs, and NH4) are responsible for the variations of the natures of the phase transitions in these crystals. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Feature Article: Understanding strongly correlated many‐body systems with quantum Monte Carlo simulations
Authors: Lavalle Catia , Rigol Marcos , Muramatsu Alejandro 
Published: July 2005

AbstractThe cover picture of the current issue, taken from the Feature Article [1], depicts the evolution of local density (a) and its quantum fluctuations (b) in trapped fermions on one‐dimensional optical lattices. As the number of fermions in the trap is increased, figure (a) shows the formation of a Mott‐insulating plateau (local density equal to one) whereas the quantum fluctuations – see figure (b) – are strongly suppressed, but nonzero. For a larger number of fermions new insulating plateaus appear (this time with local density equal to two), but no density fluctuations. Regions with non‐constant density are metallic and exhibit large quantum fluctuations of the density.The first author Catia Lavalle is a Postdoc at the University of Stuttgart. She works in the field of strongly correlated quantum systems by means of Quantum Monte Carlo methods (QMC). While working on her PhD thesis at the University of Stuttgart, she developed a new QMC technique that allows to study dynamical properties of the t–J model.
Quantification of docetaxel and its main metabolites in human plasma by liquid chromatography/tandem mass spectrometry
Authors: Guitton J. , Cohen S. , Tranchand B. , Vignal B. , Droz J‐P , Guillaumont M. , Manchon M. , Freyer G. 
Published: July 2005

AbstractDocetaxel is an antineoplastic agent widely used in therapeutics. The objective of this study was to develop and validate a routine assay, using liquid chromatography coupled to tandem mass spectrometry (LC/MS/MS), for the simultaneous quantification of docetaxel and its main hydroxylated metabolites in human plasma. A structural analogue, paclitaxel, was used as the internal standard. Determination of docetaxel and four metabolites (M1, M2, M3 and M4) was achieved using only 100 µL of plasma. Liquid‐liquid extraction was used for sample preparation, with extraction efficiency of at least 90% for all analytes. Detection used positive‐mode electrospray ionization in selected reaction monitoring mode. The lower limit of quantification (LLOQ) was 0.5 ng/mL for all analytes. The assay was linear in the calibration curve range 0.5–1000 ng/mL and acceptable precision and accuracy (<15%) were obtained with concentrations above the LLOQ. This method was sufficiently selective and sensitive for quantification of metabolites in plasma from cancer patients receiving docetaxel chemotherapy, and is suitable for routine analyses during pharmacokinetic studies. Copyright © 2005 John Wiley & Sons, Ltd.
Rapid and sensitive quantification of urinary N7‐methylguanine by isotope‐dilution liquid chromatography/electrospray ionization tandem mass spectrometry with on‐line solid‐phase extraction
Authors: Chao Mu‐Rong , Wang Chien‐Jen , Yang Hsi‐Hsien , Chang Louis W. , Hu Chiung‐Wen 
Published: July 2005

AbstractA rapid, highly specific and sensitive isotope‐dilution liquid chromatography/tandem mass spectrometry (LC/MS/MS) method coupled with an on‐line solid‐phase extraction (SPE) system was developed to measure N7‐methylguanine (N7‐MeG) in urine. 15N5‐Labeled N7‐MeG was synthesized to serve as an internal standard, and an on‐line SPE cartridge was used for on‐line sample cleanup and enrichment. The urine sample can be directly analyzed within 15 min without prior sample purification. The detection limit for this method was estimated as 8.0 pg/mL (4.8 pmol) on‐column. This method was further applied to study exposure to methylating agents arising from cigarette smoke. Sixty‐seven volunteers were recruited, including 32 regular smokers and 35 nonsmokers. Urinary cotinine, a major metabolite of nicotine, was also determined using an isotope‐dilution LC/MS/MS method. The results showed that urinary levels of N7‐MeG observed in smokers (4215 ± 1739 ng/mg creatinine) were significantly (P < 0.01) higher than those in nonsmokers (3035 ± 720 ng/mg creatinine). It was further noted that the urinary level of N7‐MeG was found to be correlated with that of cotinine for smokers, implying that cigarette smoking resulted in increased DNA methylation, followed by depurination and excretion of N7‐MeG in urine. As a result of the on‐line extraction system, this method is capable of routine high‐throughput analysis and accurate quantitation of N7‐MeG, and could be a useful tool for health surveillance of methylating agent exposure. Copyright © 2005 John Wiley & Sons, Ltd.
Pial arteriovenous fistulas: dilemmas in prenatal diagnosis, counseling and postnatal treatment. Report of three cases
Authors: Garel C. , Azarian M. , Lasjaunias P. , Luton D. 
Published: July 2005

AbstractWe report three cases of the antenatal appearance of a pial arteriovenous fistula (AVF). In Case 1, the diagnosis of pial AVF was made by ultrasound examination at 32 + 3 weeks of gestation and confirmed by magnetic resonance imaging (MRI) at 34 + 3 weeks of gestation. After birth, the neonate had cardiac insufficiency and an embolization was performed 8 days postpartum which was followed by extended cerebral ischemia and death. In Cases 2 and 3 pial fistulae were diagnosed at birth. In Case 2, the patient was referred following the diagnosis of an aneurysmal malformation of the vein of Galen at 38 weeks of gestation. Owing to immediate delivery following her transfer, no ultrasound examination was performed and the diagnosis of pial AVF was established on the first postnatal day. An embolization was performed and the child is doing well. Case 3 presented with cardiomegaly at 30 weeks of gestation and cerebral ischemic lesions after birth.These cases highlight the difficulties encountered in the prenatal diagnosis of pial AVFs. The diagnosis should be considered in cases of unexplained cardiomegaly and it is also important to make sure that AVFs draining into the vein of Galen are not misdiagnosed as aneurysmal malformations of this vein. The complications of pial AVFs are cardiac failure and cerebral ischemia. Embolization is the treatment of choice; however it is a risky procedure in neonates. Copyright © 2005 ISUOG. Published by John Wiley & Sons, Ltd.