bluuebunny/crossref_metadata_2025_split huggingface dataset:
A facile, one‐pot, green synthesis of polysubstituted 4H‐pyrans via piperidine‐catalyzed three‐component condensation in aqueous medium
Authors: Lu Guo‐Ping , Cai Chun 
Published: September 2010

AbstractAn efficient, one‐pot method was described for the synthesis of various polysubstituted 4H‐pyrans via piperidine catalyzed three‐component condensation in aqueous medium. The reaction could be promoted effectively by adding sodium dodecyl sulfate to aqueous medium. J. Heterocyclic Chem., (2010).
Comparison of systemic and otic administration of ofloxacin
Authors: Koulich Elena , Roland Peter S. , Pawlowski Karen S. 
Published: September 2010

AbstractObjectives:To assess the feasibility of delivering ofloxacin across the intact tympanic membrane; to compare middle ear bioavailability of ofloxacin after otic and systemic administrations; to determine distribution of otically delivered ofloxacin to other tissues.Study Design:A prospective, controlled animal study.Methods:Rats underwent surgery wherein the middle ear cavity was opened and filled with saline. An equivalent amount of ofloxacin was delivered intraperitoneally or into the external ear canal. Saline within the middle ear was sampled and completely replaced in 15‐minute intervals for 3 hours. Blood was collected twice after the initial application of ofloxacin for high‐performance liquid chromatography (HPLC). Animals were sacrificed 3 hours after the initial addition of ofloxacin; the temporal bones were harvested for histological analysis; urine and colon mucosa were collected for HPLC analysis.Results:Both systemic and otic applications led to a comparable accumulation of ofloxacin in the middle ear over the 3‐hour period after the initial administration. The pharmacokinetics of ofloxacin penetration into the middle ear was sporadic and subject‐dependent. Both methods of administration led to drug accumulation in blood serum, urine, and colonic mucosa.Conclusions:Topical application of ofloxacin to the intact tympanic membrane allows for drug penetration into the middle ear space. Similar middle ear ofloxacin levels could be achieved with systemic and topic applications, but drug concentrations were inconsistent. The accumulation of ofloxacin in other tissues suggests applications designed to be ototopical may also result in systemic absorption. Laryngoscope, 2010
Agricultural land conversion drivers: A comparison between less developed, developing and developed countries
Authors: Azadi H. , Ho P. , Hasfiati L. 
Published: September 2010

AbstractThis study examines the level of intensity, trend and the main drivers of agricultural land conversion (ALC) worldwide. Considering the World Bank classification and using a stratified random sampling, 94 countries were selected in three different groups: less developing, developing and developed countries. Data were obtained from two databases; Nation Master and Earth Trends for the period of 1961–2003. The empirical results revealed some differences in the level of intensity and the trend of ALC among the groups. Agricultural land loss was more intensified in developing countries experiencing rapid economic growth and a transition in their economic structure. The results also showed that there is a positive correlation between ALC and productivity, capital–labour ratio and urban population. Urban population was identified as the main driver affecting ALC in all the countries. Furthermore, although urbanization process exists in all the groups, the developed countries are more successful in managing urban development and ALC. Considering the increasing trend of ALC in the future and its socio‐economic and environmental impacts, this study concluded that governments' intervention in land policies is needed to preserve agricultural lands. Copyright © 2010 John Wiley & Sons, Ltd.
Utility of uncalibrated femoral stroke volume variation as a predictor of fluid responsiveness during the anhepatic phase of liver transplantation
Authors: Shin Young Hee , Ko Justin Sangwook , Gwak Mi Sook , Kim Gaab Soo , Lee Jong Hwan , Lee Suk-Koo 
Published: September 2010

Abstract

We evaluated the value of the stroke volume variation (SVV) calculated with the Vigileo monitor, which recently has been increasingly advocated for fluid management, as a predictor of fluid responsiveness during the anhepatic phase of liver transplantation (LT). We also compared SVV to the central venous pressure (CVP) and pulmonary arterial occlusion pressure (PAOP) in patients. Thirty-three adult recipients scheduled for elective living donor LT were enrolled in this study. Twenty minutes after the start of the anhepatic phase, the CVP, PAOP, approximate inferior vena caval pressure, femoral SVV, and cardiac output values were measured before and 12 minutes after fluid loading. Fluid loading was performed with a 6% hydroxyethyl starch solution (10 mL/kg). The responders were defined as patients whose cardiac index increased ≥15% after fluid loading. Receiver operating characteristic (ROC) analysis showed that only femoral SVV (area under the curve = 0.894, P = 0.0001) could be used to predict fluid responsiveness during the anhepatic phase of LT. The area under the ROC curve for femoral SVV was 0.894 (P = 0.0001), and it was significantly larger than those for CVP (area under the curve = 0.576, P = 0.004) and PAOP (area under the curve = 0.670, P = 0.021). Femoral SVV >8% identified the responders with a sensitivity of 89% and a specificity of 80%. Our results suggest that femoral SVV derived with the Vigileo monitor would be useful for fluid management during the anhepatic phase in LT recipients. Liver Transpl 17:53-59, 2011. © 2011 AASLD.
Multi‐objective optimization for channel allocation in mobile computing using NSGA‐II
Authors: Vidyarthi Deo , Khanbary Lutfi 
Published: September 2010

AbstractEfficient channel allocation to mobile hosts aims to minimize the number of blocked hosts and is of utmost importance in a mobile computing network. Also, to achieve highly reliable data transmission, wireless mobile networks require efficient and reliable link connectivity regardless of terminal mobility, and thus reliable traffic performance. A mobile network consists of mobile nodes, base stations, links, etc. that are often prone to failure. The multi‐objective optimization problem (MOP), does not offer one best solution with respect to all the objectives. The aim is to determine the trade‐off surface, which is a set of non‐dominated solution points known as Pareto‐optimal. The two objectives addressed in this paper are to minimize the number of blocked hosts while maximizing the reliability of the data transmission. A multi‐objective optimization is carried out to optimize both objectives simultaneously. The elitist NSGA‐II (non‐dominated sorting genetic algorithm) has been used as an evolutionary optimization technique to solve this problem. A population of efficient solutions results when the termination condition is satisfied. Also the Pareto‐optimal fronts obtained provide a wide range of trade‐off operating conditions from which an appropriate operating point may be selected by the decision maker. The experimental results are presented and analyzed for overall evaluation of the performance of the proposed work. Further, comparison of the results with the two recent earlier models reveals that the proposed work performs better in serving mobile hosts as it caters to two objectives simultaneously. Copyright © 2010 John Wiley & Sons, Ltd.
A novel lightweight authentication scheme with anonymity for roaming service in global mobility networks
Authors: Wu Shuhua , Zhu Yuefei , Pu Qiong 
Published: September 2010

AbstractRecently, two authentication schemes with anonymity for roaming service in wireless networks were proposed by Heet al. and Xuet al.In this paper we point out that neither of the two schemes is sufficiently practical owing to the high computational cost involved. Furthermore, we also find that both schemes still have some weaknesses which allow the attacker to trace a certain user's behaviors and thus infer his real identity. Thereafter, we propose a novel lightweight authentication scheme with anonymity for roaming service in global mobility networks to overcome the aforementioned defects. Moreover, we formally analyze our proposed scheme with BAN‐logic and show that it can withstand several possible attacks. Copyright © 2010 John Wiley & Sons, Ltd.
Long term G‐CSF‐induced remission of ulcerative colitis‐like inflammatory bowel disease in a patient with glycogen storage disease Ib and evaluation of associated neutrophil function
Authors: Alsultan Abdulrahman , Sokol Ronald J. , Lovell Mark A. , Thurman Gail , Ambruso Daniel R. 
Published: September 2010

AbstractWe present a 23‐year‐old female with Glycogen storage disease Ib (GSD Ib) who was diagnosed with ulcerative colitis‐like inflammatory bowel disease (IBD) at 7 years of age. G‐CSF therapy reversed the IBD, was required to maintain IBD remission and was well tolerated. Neutrophil functions at time of diagnosis showed impaired chemotaxis but normal superoxide anion production and bactericidal activity. Ulcerative colitis‐like IBD may also be seen in GSD Ib and is responsive to G‐CSF therapy. Neutrophil dysfunction is variable among patients with GSD Ib. Pediatr Blood Cancer. 2010;55:1410–1413. © 2010 Wiley‐Liss, Inc.
Serum prohepcidin concentrations at birth and 1 month after birth in premature infants
Authors: Kitajima Junko , Ohga Shouichi , Kinjo Tadamune , Ochiai Masayuki , Takahata Yasushi , Honjo Satoshi , Hara Toshiro 
Published: September 2010

AbstractBackgroundPremature newborns are vulnerable to iron imbalance, although the iron homeostasis during the perinatal period remains unclear. To clarify the iron metabolism of premature infants, we measured serum prohepcidin concentrations of preterm infants, and analyzed the association with iron parameters.MethodsSeventy‐one (61 preterm and 10 term) infants were enrolled for the study, that had no underlying diseases including asphyxia, bleedings, infection, and anomalies. Serum concentrations of prohepcidin at birth and 1 month after birth were determined by enzyme‐linked immunosorbent assay.ResultsProhepcidin levels at birth but not 1 month postnatal age positively correlated with gestational age (correlation coefficient [CC]:0.334, P = 0.005) and birth weight (CC: 0.367, P = 0.002). The levels at birth of preterm infants (median: 29.93 ng/ml, range: 4.0–110.6) were lower than those of full‐term infants, and increased thereafter. On the other hand, the levels in small‐for‐gestational age infants were not associated with gestational age or birth weight. Prohepcidin levels at birth correlated positively with red cell counts (CC = 0.487, P = 0.025), unsaturated iron binding capacity (CC = 0.755, P = 0.001), total protein (CC = 0.624, P = 0.005), and serum albumin levels (CC = 0.500, P = 0.025), and negatively with serum iron levels (CC = −0.688, P = 0.003), but not ferritin levels. Multivariate analyses indicated that prohepcidin levels at birth were lower in infants with pregnancy‐induced hypertension (P = 0.03) or premature rupture of membrane (P = 0.01).ConclusionsProhepcidin production was physiologically low at birth of preterm infants according to the gestational age, and the levels might be susceptible to the in utero stress. The postnatal increase might reflect the maturation and/or adaptation of iron homeostasis. Pediatr Blood Cancer 2011;56:267–272. © 2010 Wiley‐Liss, Inc.
Improved sorting of carbon nanotubes according to electronic type by density gradient ultracentrifugation
Authors: Posseckardt Juliane , Battie Yann , Fleurier Romain , Lauret Jean‐Sébastien , Loiseau Annick , Jost Oliver , Mertig Michael 
Published: September 2010

AbstractA variety of fabrication methods for single‐walled carbon nanotubes (SWCNTs) has been developed, but none of them has been proven to generate tubes of only one chirality. Hence, a sample of as‐produced SWCNTs always consists of a mixture of metallic and semiconducting tubes. By this, the application of SWCNTs in electronics, optics and sensing is limited today. Recently, the sorting of carbon nanotubes using density gradient ultracentrifugation (DGU) has been demonstrated. We report on an improved sorting according to electronic type by applying a two‐step procedure: In the first step, we enriched semiconducting SWCNTs via DGU. In the second step, the sorted fractions have been reinserted and a second DGU was performed, winnowing metallic SWCNTs. Employing this procedure, we were able to reduce the content of metallic SWCNTs from 38 to 11%. Furthermore, we assembled carbon nanotube field‐effect transistors with a high ON/OFF ratio from the sorted fraction in a single step by dielectrophoresis.
Host–guest interaction between single‐wall carbon nanotubes and encapsulated C60 probed by resonance Raman spectroscopy
Authors: Joung Soon‐Kil , Okazaki Toshiya , Okada Susumu , Iijima Sumio 
Published: September 2010

AbstractSingle‐wall carbon nanotubes (SWCNTs) that are encapsulating C60 [nanopeapods (NPDs)] can be considered one of the best model systems for investigating host–guest interactions in π‐conjugated molecular systems. We thus have investigated the effects of C60 encapsulation on the radial breathing mode (RBM) frequencies of semiconducting SWCNTs in a wide range of diameters (dt = ∼1.23 − 1.5 nm). The observed frequency shifts show a characteristic behavior depending on the intermolecular spacing between encapsulated C60 and the host SWCNTs. The present findings clearly indicate the van der Waals nature of the SWCNT‐C60 interaction.
Electron spin resonance on single‐walled carbon nanotubes obtained from different sources
Authors: Ferrer‐Anglada Núria , Monge Aida Abiad , Roth Siegmar 
Published: September 2010

AbstractWe used electron spin resonance (ESR) to analyze several kinds of single‐walled carbon nanotubes (SWNTs) synthesized by different methods. We observed that ESR is a sensitive probe that can be used to observe major differences between samples of carbon nanotubes (CNTs), in relation to their proportion of magnetic catalysts, impurities or defects. We analyzed the ESR spectra of CNTs in the usual way, by three overlapping lines. We then, implemented a function to fit the spectra, which gave us the intensity, line width (ΔHPP), and resonance line position (g factor) of each component line. The asymmetric line, which is assigned to the conduction electrons, could be used as a fingerprint of CNT purity. However, this asymmetric line is not always observed, since the three ESR lines often overlap, particularly when there is a large amount of paramagnetic ions. We studied the ESR spectra for different samples and estimated their purity by comparing the resulting parameters with data obtained by Raman spectroscopy on the same samples.
Electronic structure, effective masses, mechanical and thermo‐acoustic properties of cubic HfO2 under pressure
Authors: Liu Qi‐Jun , Liu Zheng‐Tang , Feng Li‐Ping , Xu Bing 
Published: September 2010

AbstractElectronic structure, effective masses, mechanical and thermo‐acoustic properties of cubic HfO2 at applied hydrostatic pressure up to 50 GPa have been investigated using the plane‐wave ultrasoft pseudopotential technique based on the first‐principles density‐functional theory (DFT). The calculated ground‐state properties are in good agreement with previous data, and the band gaps increase versus pressure. The valence‐ and conduction‐band effective masses for the first time have been theoretically predicted under different pressures, and the calculated carrier effective masses are shown to be anisotropic. The three independent elastic constants C11, C12 and C44 for cubic HfO2 have been calculated at zero pressure and high pressure. Using the Voigt, Reuss and Hill theory, the bulk, shear and Young's moduli and Poisson coefficients have been obtained at the applied pressure. From the obtained elastic constants, the acoustic velocity and Debye temperature ${\Theta }_{{\rm D}} $ have been estimated versus pressure. The results obtained at 0 GPa are consistent with the previous data.
Gradient nanowires and nanotubes
Authors: Agarwal S. , Eckhardt B. , Grossmann F. , Greiner A. , Göring P. , Wehrspohn R. B. , Wendorff J. 
Published: September 2010

AbstractDifferent routes to prepare gradient nanowire and nanotubes are presented including the use of polymeric and metal nanoparticles. In the case of electrospinning, latex particles have been added to electrospinning solution. The properties of the fibres have been studied theoretically and experimentally. In the case of face‐to‐face‐wetting of porous templates, solution as well as melt wetting for different polymeric composition from both sides of the template is carried out. It turned out that solution wetting leads to an intermixing of the compounds whereas as melt wetting leads to sharp compositional interfaces. The method has been extended to include plasmonic and magnetic nanoparticles for nanophotonic applications.magnified image
Characterization of nanowires with the low energy electron point source (LEEPS) microscope
Authors: Beyer André , Weber Dirk H. , Völkel Berthold , Gölzhäuser Armin 
Published: September 2010

AbstractThe low energy electron point source (LEEPS) microscope is an instrument for the characterization of structural, electrical, and mechanical properties of single molecules and nanostructures. In this work, we review our efforts in advancing LEEPS as tool for the characterization of electric properties of nanowires. Individual nanowires of different size and material were examined, including compositions of metallic as well as semiconducting character. The nanowires were characterized by electrical conductance measurements with a metallic tip as movable electrode and the sample support as its counterpart. Beyond these measurements, we developed a scheme to deduce the electrical conductivity of a single nanowire directly from its LEEPS image. This substantially reduces the data acquisition time and widens the applicability of LEEPS microscopy.
FaBSR: a method for cluster failure prediction based on Bayesian serial revision and an application to LANL cluster
Authors: Liu Qiang , Zhou Jinglun , Jin Guang , Sun Quan , Xi Min 
Published: September 2010

AbstractAccurate failure number prediction of Repairable Large‐scale Long‐running Computing (RLLC) cluster systems is a challenge because of the reparability and large scale of the system. Furthermore, the variational failure rate derived from system maintenance yields a small sample problem, that is, the failure numbers observed from different time phases do not belong to the same population. To address the challenge, a general Bayesian serial revision prediction method (FaBSR) is proposed on the basis of the Time Series and Bootstrap approaches, and it can determine the distribution of failure number, analyze the variation trend of failure rate and accurately predict the failure number. To demonstrate the performance gains of the method, the data of Los Alamos National Laboratory (LANL) cluster system are used as a typical RLLC system to do extensive experiments. And experimental results show that the prediction accuracy of FaBSR is 80.4%, improved by more than 4% compared with other existing methods. Copyright © 2010 John Wiley & Sons, Ltd.
CHARMM‐based parameterization of neutral articaine—A widely used local anesthetic
Authors: Prates Érica T. , Souza Paulo C. T. , Pickholz Mónica , Skaf Munir S. 
Published: September 2010

AbstractWe present a set of CHARMM‐based parameters of molecular mechanics force field for neutral articaine (ATC), a potent and widely used local anesthetic in medical and dental applications. Partial atomic charges and effective torsion potentials around four chemical bonds, not available in CHARMM for this molecule, were obtained from quantum chemical calculations. The newly parameterized model was evaluated by examining the behavior of ATC in water and in a phospholipid bilayer using molecular dynamics simulations. © 2010 Wiley Periodicals, Inc. Int J Quantum Chem, 2010
The quantum‐chemical study of organic octupolar chromophore triaminotrinitrobenzene and the dimer: Topological analysis and nonlinear optical characteristics
Authors: Balakina Marina Yu. , Fominykh Olga D. 
Published: September 2010

AbstractThe nonempirical calculations of the structure and molecular polarizabilities of octupolar 1,3,5‐triamino‐2,4,6‐trinitrobenzene (TATB) molecule and2TATBdimer, formed of two chromophores through H‐bonding between Oxygens of nitro groups and hydrogens of amino groups of the neighboring molecule, were calculated by TDHF/aug‐cc‐pVDZ′ method. The characterization of2TATBformation is carried out in the framework of topologicalAtoms in Moleculesapproach. The analysis of electron charge density distribution has given evidence to the existence of two equivalent intermolecular NH…O bonds with the bond length of 2.458 Å; the intramolecular H‐bonds between oxygens and hydrogens of alternating nitro‐ and amino groups are also detected. The study of the solvent effect on theTATBelectric properties, performed in the framework of conventional polarizable continuum model, demonstrated weak dependence of molecular polarizabilities on the solvent polarity. The polarizability of2TATBdimer is nearly twice as large as that ofTATB, whereas the modulus of the first hyperpolarizability of2TATBis ∼2.3 times greater than that ofTATB, thus exhibiting the cooperative effect. © 2010 Wiley Periodicals, Inc. Int J Quantum Chem, 2011
Helium‐fullerene pair interactions: An ab initio study by perturbation theory and coupled cluster methods
Authors: Varandas A. J. C. 
Published: September 2010

AbstractCuts of the interaction potentials between He and CN (N = 20, 36), calculated and extrapolated to the one‐electron complete basis set limit with Møller–Plesset perturbation theory, have been utilized to obtain extrapolated curves with coupled cluster singles and doubles theory. Calculations are also reported for HeC60 at the Møller–Plesset level with the cc‐pVDZ basis set, and an a priori relationship suggested that relates the well depth of such dimers to the number of C atoms. The predicted van der Waals attributes conform with empirical data, which can be rationalized as a manifestation of the Born–Oppenheimer approximation. © 2010 Wiley Periodicals, Inc. Int J Quantum Chem, 2011