bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis, X‐ray structure, characterization and catalytic activity of a polymeric manganese(II) complex with iminodiacetate
Authors: Bagherzadeh Mojtaba , Amini Mojtaba , Boghaei Davar M. , Najafpour Mohammad Mahdi , McKee Vickie 
Published: May 2011

AbstractA polymeric manganese(II) complex with the general formula [Mn(O2CCH2NH2CH2CO2)2(H2O)2]n from reaction of iminodiacetatic acid and manganese(II) perchlorate under nitrogen in water, was synthesized and characterized. The structure of the complex was determined using single‐crystal X‐ray diffraction, elemental analysis, IR and UV‐vis spectra. This complex exhibited excellent catalytic activity and selectivity for oxidation of various alcohols and sulfides to the corresponding aldehydes/ketone and sulfoxides using urea hydrogen peroxide and oxone (2KHSO5·KHSO4·K2SO4), respectively, as oxidants under air at room temperature. The easy preparation, mild reaction conditions, high yields of the products, short reaction time, no over‐oxidation products, high selectivity and inexpensive system make this catalytic system a useful method for oxidizing various alcohols and sulfides. Copyright © 2011 John Wiley & Sons, Ltd.
Cobalt zeolites: Preparation, characterization and catalytic properties for N2O decomposition
Authors: Shen Qun , Li Landong , He Chi , Zhang Xinyan , Hao Zhengping , Xu ZhiPing 
Published: May 2011

ABSTRACTThe current research characterized various Co/zeolite catalysts prepared by wet incipient impregnation approach and investigated their N2O catalytic decomposition activities. The Co/zeolite catalysts were characterized by BET, H2‐TPR, UV–vis, NH3‐TPD and TEM in detail, which reveals that the physicochemical properties of these catalysts are determined by the type of zeolite support, the cobalt species and their location (internal or external surface). In particular, it is found that the loaded cobalt species have great effects on the acidic property of zeolite supports. Co/Beta‐3% shows the highest catalytic activity and the cobalt loading content slightly influences the catalytic activities of Co/Beta catalysts. Moreover, the catalytic performance of Co/Beta‐3% is not disturbed by the presence of NO and O2. As thus, we believed that Beta zeolite is the most suitable support to prepare Co‐loaded catalyst for N2O decomposition in our work. Copyright © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.
Poly(ether ether ketone)s and poly(ether ether ketone ketone)s containing cardo decahydronaphthalene groups: Synthesis and characterization
Authors: Honkhambe Pandurang N. , Pasale Sharad K. , Bhairamadgi Nagendra S. , Kumbhar Kishor P. , Salunkhe Manikrao M. , Wadgaonkar Prakash P. 
Published: May 2011

AbstractNew poly(ether ether ketone)s and poly (ether ether ketone ketone)s were synthesized by polycondensation of each of the three bisphenols, viz., 4,4′‐(octahydro‐2(1H)‐naphthylidene)bisphenol, 4,4′‐(octahydro‐2(1H)‐naphthylidene)bis‐3‐methylphenol, and 4,4′‐(octahydro‐2(1H)‐naphthylidene)bis‐3,5‐dimethylphenol with 4,4′‐difluorobenzophenone and 1,3‐bis(4‐fluorobenzoyl)benzene in a mixture of N,N‐dimethylacetamide and toluene [1 : 1 (v/v)] in the presence of anhydrous potassium carbonate. Inherent viscosities of poly(ether ether ketone)s and poly (ether ether ketone ketone)s were in the range 0.32–0.80 dL/g and number‐average molecular weights were in the range 16,100–55,900 g/mol. Poly(ether ether ketone)s and poly(ether ether ketone ketone)s were soluble in organic solvents such as dichloromethane, chloroform, tetrahydrofuran, meta‐cresol, pyridine, and 1‐methyl‐2‐pyrrolidinone at room temperature and could be cast into tough, transparent, and flexible films from their chloroform solutions. Wide angle x‐ray diffraction measurements revealed the amorphous nature of poly(ether ether ketone)s and poly (ether ether ketone ketone)s. The glass transition temperature poly(ether ether ketone)s and poly(ether ether ketone ketone)s were in the range 185–251°C. The temperature at 10% weight loss, determined from thermogravimetric analysis, of poly(ether ether ketone)s and poly(ether ether ketone ketone)s in nitrogen atmosphere was in the range 462–493°C indicating their good thermal stability. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Effect of solvents on cyanoethylation of cotton cellulose and its properties
Authors: Krishnaveni R. , Thambidurai S. 
Published: May 2011

AbstractThe cyanoethylation of cotton fabric was carried out using aqueous sodium hydroxide with acrylonitrile in presence of solvents like acetone and ethanol in different concentrations. The modified cellulose was investigated with vertical wicking test, X‐ray diffraction (XRD), thermogravimetry‐differential thermal analysis (TG/DTA), and atomic force microscopy (AFM). The wicking height was increased for the modified cellulose. Modified cellulose had increase in crystallinity index with reduction of crystallite size. The thermal stability of the modified cellulose was also increased. The images produced using AFM technique revealed that there is appreciable difference in the surface roughness between scoured, mercerized, cyanoethylated and solvent treated samples. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Properties of ultra high molecular weight polyethylene fibers after ion beam treatment
Authors: Yakusheva D. E. , Yakushev R. M. , Oschepkova T. E. , Strelnikov V. N. 
Published: May 2011

AbstractUltrahigh molecular weight fibers were treated by low energy ion beam in a pulse regime. Results of infrared and WAXD analyses showed the change of both chemical structure and morphology of the fiber surface. Adhesion of the treated fiber surface to conventional binders appeared to be two times higher than that of untreated fiber. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Synthesis and characterization of poly(vinyl 2,4,6‐trinitrophenylacetal) as a new energetic binder
Authors: Jin Bo , Dong Haishan , Peng Rufang , Shen Juan , Tan Bisheng , Chu Shijin 
Published: May 2011

AbstractPoly(vinyl alcohol) was modified by an aldehyde acetal reaction with 2,4,6‐trinitrophenylacetaldehyde to give a new energetic polymer poly(vinyl 2,4,6‐trinitrophenylacetal) (PVTNP). The structure of PVTNP was characterized by elemental analysis, ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy, and nuclear magnetic resonance spectra. The glass‐transition temperature of PVTNP was evaluated by differential scanning calorimetry (DSC), and the thermal stability of PVTNP was tested by differential thermal analysis (DTA) and thermogravimetric analysis (TGA). DSC traces showed that the PVTNP polymer had one single glass‐transition temperature at 105.3°C. DTA and TGA curves showed that the thermooxidative degradation of PVTNP in air was a three‐step reaction, and the percentage of degraded PVTNP reached nearly 100% at 650°C. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Modeling coupled migration and settling of particulates in curing filled epoxies
Authors: Mondy Lisa , Rao Rekha , Lindgren Eric , Sun Amy , Adolf Doug , Retallack Charles , Thompson Kyle 
Published: May 2011

AbstractEpoxy resins filled to a high solids loading (40–60% by volume) with noncolloidal particles are used to mitigate stress and vibration in electronic components. We perform continuum‐level finite element method (Schunk et al., A Full‐Newton Finite Element Program for Free and Moving Boundary Problems with Coupled Fluid/Solid Momentum, Energy, Mass, and Chemical Species Transport: User's Guide, Sandia National Laboratories) simulations of filler particle redistribution during the nonisothermal cure of the epoxy under both quiescent and bulk flow conditions. An extent of reaction is used to track the degree of cure. To determine the particle migration, we couple a diffusive flux suspension model (Zhang and Acrivos, Int J Multiphase Flow 1994, 20, 579.) with the curing model. The heat transfer, including the exothermic polymerization reaction, is also modeled. The result is a generalized Newtonian model that has viscosity as a function of temperature, cure and particle volume fraction. With x‐ray computed tomography, we examine settling of the particulate phase in both flowing and quiescent curing systems and compare the experimental results to the model predictions. The model is also validated with temperature measurements. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Incorporation of antigens from Mannheimia haemolytica culture supernatant, and recombinant bovine C3d into ISCOM matrix using neutravidin–biotin interaction
Authors: Moore D. P. , Hodgins D. C. , Firth M. A. , McBey B. A. , Shewen P. E. 
Published: May 2011

AbstractThe aim of this study was to incorporate antigens from Mannheimia haemolytica culture supernatant, and an immune modulatory molecule, recombinant bovine C3d (rBoC3d), into immune stimulating complexes (ISCOMs) using neutravidin–biotin interaction. Biotinylated ISCOM matrix was generated using a commercial kit. The biotinylated ISCOM matrix was incubated with neutravidin and then centrifuged in a sucrose density gradient. The rBoC3d was expressed as an in vivo biotinylated protein and with a c‐Myc tag (EQKLISEEDL) engineered to facilitate detection. The neutravidin‐coated ISCOM matrix was incubated with biotinylated antigens from M. haemolytica culture supernatants and rBoC3d. To test the association among the neutravidin‐coated ISCOM matrix, biotinylated antigens and rBoC3d, an analytical sucrose density gradient (10–40%, w/w) was performed. The experimental formulations were run in SDS‐PAGE gels under reducing conditions. For Western immunoblot analysis, polyclonal bovine antiavidin, monoclonal anti‐c‐Myc, monoclonal antileukotoxin, and anti‐GS60 antibodies were used to detect the presence of neutravidin, rBoC3d, leukotoxin, and GS60 antigens, respectively. By taking advantage of the biotin–neutravidin interaction, not only leukotoxin but also the recombinant immunomodulatory molecule, rBoC3d, was incorporated into ISCOM particles.
Cellular DNA methylation program during neurulation and its alteration by alcohol exposure
Authors: Zhou Feng C. , Chen Yuanyuan , Love Ada 
Published: May 2011

AbstractBACKGROUND: Epigenetic changes are believed to be among the earliest key regulators for cell fate and embryonic development. To support this premise, it is important to understand whether or not systemic epigenetic changes coordinate with the progression of development. We have demonstrated that DNA methylation is programmed when neural stem cells differentiate (Zhou et al.,2011). Here, we analyzed the DNA methylation events that occur during early neural tube development. METHODS AND RESULTS Using immunocytochemistry, we demonstrated that the DNA methylation marks – 5‐methylcytosine (5‐MeC), DNA methylation binding domain 1 (MBD1), and DNA methytransferases 1 (DNMT1) were highly coordinated in temporal and spatial patterns that paralleled the progress of embryonic development. The above ontogenic program of DNA methylation was, however, subjected to environmental modification. Alcohol exposure during fetal development, which is known to cause fetal alcohol spectrum disorder, altered the density and distribution of the DNA methylation marks. The alcohol exposure (88 mM) over 6 or 44 hours at gestation day 8 (GD‐8) to GD‐10 altered timely DNA methylation and retarded embryonic growth. We further demonstrated that the direct inhibiting of DNA methylation with 5‐aza‐cytidine (5‐AZA) resulted in similar growth retardation. CONCLUSIONS We identified a temporal and spatial cellular DNA methylation program after initial erasure, which parallels embryonic maturation. Alcohol delayed the cellular DNA methylation program and also retarded embryonic growth. Since direct inhibiting of DNA methylation resulted in similar retardation, alcohol thus can affect embryonic development through a epigenetic pathway. Birth Defects Research (Part A) 2011. © 2011 Wiley‐Liss, Inc.
Origin and development of the atrioventricular myocardial lineage: Insight into the development of accessory pathways
Authors: Aanhaanen Wim T. J. , Moorman Antoon F. M. , Christoffels Vincent M. 
Published: May 2011

AbstractDefects originating from the atrioventricular canal region are part of a wide spectrum of congenital cardiovascular malformations that frequently affect newborns. These defects include partial or complete atrioventricular septal defects, atrioventricular valve defects, and arrhythmias, such as atrioventricular re‐entry tachycardia, atrioventricular nodal block, and ventricular preexcitation. Insight into the cellular origin of the atrioventricular canal myocardium and the molecular mechanisms that control its development will aid in the understanding of the etiology of the atrioventricular defects. This review discusses current knowledge concerning the origin and fate of the atrioventricular canal myocardium, the molecular mechanisms that determine its specification and differentiation, and its role in the development of certain malformations such as those that underlie ventricular preexcitation. Birth Defects Research (Part A), 2011. © 2011Wiley‐Liss, Inc.
Eye‐of‐the‐Tiger sign is not Pathognomonic of Pantothenate Kinase‐Associated Neurodegeneration in Adult Cases
Authors: Chang Chaw‐Liang , Lin Chih‐Ming 
Published: May 2011

AbstractAn eye‐of‐the‐tiger sign is previously known to have one‐to‐one correlation with pantothenate kinase‐associated neurodegeneration (PKAN). Reviewing the literature on this subject, the correlation between eye‐of‐the‐tiger sign and PKAN seems to show an interesting hypothesis that differs from conventional conclusion. We analyze the published papers in an attempt to reflect this trend and illustrate our points with findings in a 39‐year‐old man. His brain magnetic resonance imaging study shows typical eye‐of‐the‐tiger sign suggestive of PKAN. Genetic analyses revealed no mutations in pantothenate kinase 2.
Use of Pistachio Shells as an Adsorbent for the Removal of Zinc(II) Ion
Authors: Turan Nurdan Gamze , Mesci Başak 
Published: May 2011

AbstractIn this study, the removal of zinc(II) ion from an aqueous solution by pistachio shells (PS) is investigated. The dynamic behavior of the adsorption is examined on the effects of pH, adsorbent dosage, and contact time. The adsorption rates are determined quantitatively and simulated by the Lagergren first order, pseudo‐second order, Elovich, and intra‐particle diffusion kinetic models. The adsorption kinetic models are also tested for validity. The thermodynamic parameters, which are also deduced from adsorption experiments, are very useful in elucidating the nature of adsorption. The experimental results reveal that the optimum pH value and the contact time for the adsorption of Zn2+ onto PS are found as 6 and 10 min, respectively. According to these parameters, adsorption process follows the pseudo‐second order kinetic model with high correlation coefficients (R2 = 0.999). The obtained results demonstrate that PS is a reasonably effective adsorbent for the removal of Zn2+ from aqueous leachate of hazardous waste.
Relaxation of Collisional Magnetically Confined Plasmas to Mechanical Equilibria
Authors: Sonnino G. 
Published: May 2011

AbstractThe relaxation of magnetically confined plasmas in a toroidal geometry is analyzed. From the equations for the Hermitian moments, we show how the system relaxes towards the mechanical equilibrium. In the space of the parallel generalized frictions, after fast transients, the evolution of collisional magnetically confined plasmas is such that the projections of the evolution equations for the parallel generalized frictions and the shortest path on the Hermitian moments coincide. For spatially‐extended systems, a similar result is valid for the evolution of the thermodynamic mode (i.e., the mode with wave‐number k = 0). The expression for the affine connection of the space covered by the generalized frictions, close to mechanical equilibria, is also obtained. The knowledge of the components of the affine connection is a fundamental prerequisite for the construction of the (nonlinear) closure theory on transport processes (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Screening for cervical neoplasia: A community‐based trial comparing Pap staining, human papilloma virus testing, and the new bi‐functional celldetect® stain
Authors: Idelevich Pavel , Kristt Don , Schechter Eduardo , Lew Sylvia , Elkeles Adi , Terkieltaub Dov , Rivkin Ilia , Bruchim Ilan , Fishman Ami 
Published: May 2011

AbstractAlthough cytological screening for cervical neoplasia has lowered mortality rates, current screening methods are plagued by sub‐optimal sensitivity and/or specificity. The purpose of this study was to compare the performance of the new CellDetect® staining technology as a potential screening tool. This initial, non‐blinded study, utilized samples are taken at a community‐based clinic. The diagnostic results using CellDetect® were compared with the performance of Pap staining and human papilloma virus (HPV) testing on the same material, as well as the follow‐up biopsies. These data were statistically analyzed in terms of sensitivity, specificity, predictive value (N.P.V and P.P.V), and inter‐observer agreement. Bi‐functional CellDetect® staining revealed morphological details and tinctorial properties that permitted recognition of neoplasia even at low magnification. Performance‐wise, CellDetect® demonstrated non‐inferiority for all statistical parameters to both Pap and HPV tests. Importantly, superior sensitivity compared with Pap staining was observed, as well as higher specificity than HPV testing with near equivalent sensitivity. We conclude that CellDetect® is a promising approach to early detection of cervical cancer because of its bi‐functional capabilities that afford high sensitivity and specificity. The data suggest that this new methodology warrants further and more extensive clinical evaluation. Diagn. Cytopathol. 2012. © 2011 Wiley Periodicals, Inc.
Prenatal exposure to lps leads to long‐lasting physiological consequences in male offspring
Authors: Asiaei Masoud , Solati Jalal , Salari Ali‐Akbar 
Published: May 2011

AbstractGrowing evidence suggests that early life events are critical determinants for disorders later in life. According to a comprehensive number of epidemiological/animal studies, exposure to lipopolysaccharide, causes alteration in pro‐inflammatory cytokine levels, hypothalamic–pituitary–adrenal functioning and the hormonal system which may contribute to behavioral and neurological injuries. In this study we investigated the effects of lipopolysaccharide administration on physiological parameters in pregnant dams and their male offspring aged 9 weeks. In gestational Day 10, pregnant mice were injected intrapritoneally with Salmonella enterica lipopolysaccharide to model prenatal exposure to infection. The following results were obtained for offspring from dams stressed during pregnancy: (a) reduced anxiety‐related behavior in the elevated plus maze; (b) reduced food and water intake; (c) reduced body weight from birth up to postnatal Day 40. The observed data provide experimental evidence showing that prenatal stress can have complex and long‐lasting physiological/behavioral consequences in offspring. © 2011 Wiley Periodicals, Inc. Dev Psychobiol 53:828–838, 2011.
Barfly: Sculpting membranes at the Drosophila neuromuscular junction
Authors: Oh Eugene , Robinson Iain 
Published: May 2011

AbstractThe ability of a cell to change the shape of its membranes is intrinsic to many cellular functions. Proteins that can alter or recognize curved membrane structures and those that can act to recruit other proteins which stabilize the membrane curvature are likely to be essential in cell functions. The BAR (Bin, amphiphysin, RVS167 homology) domain is a protein domain that can either induce lipidic membranes to curve or can sense curved membranes. BAR domains are found in several proteins at neuronal synapses. We will review BAR domain structure and the role that BAR domain containing proteins play in regulating the morphology and function of the Drosophila neuromuscular junction. In flies the BAR domain containing proteins, endophilin and syndapin affect synaptic vesicle endocytosis, whereas CIP4, dRich, nervous wreck and syndapin affect synaptic morphology. We will review the growing evidence implicating mutations in BAR domain containing proteins being the cause of human pathologies. © 2011 Wiley Periodicals, Inc. Develop Neurobiol 72: 33–56, 2012
Genotyping of Saccharomyces cerevisiae strains by interdelta sequence typing using automated microfluidics
Authors: Franco‐Duarte Ricardo , Mendes Inês , Gomes Ana Catarina , Santos Manuel A. S. , de Sousa Bruno , Schuller Dorit 
Published: May 2011

AbstractAmplification of genomic sequences flanked by delta elements of retrotransposons TY1 and TY2 is a reliable method for characterization of Saccharomyces cerevisiae strains. The aim of this study is to evaluate the usefulness of microfluidic electrophoresis (Caliper LabChip®) to assess the factors that affect interlaboratory reproducibility of interdelta sequence typing for S. cerevisiae strain delimitation. We carried out experiments in two laboratories, using varying combinations of Taq DNA polymerases and thermal cyclers. The reproducibility of the technique is evaluated using non‐parametric statistical tests and we show that the source of Taq DNA polymerase and technical differences between laboratories have the highest impact on reproducibility, whereas thermal cyclers have little impact. We also show that the comparative analysis of interdelta patterns is more reliable when fragment sizes are compared than when absolute and relative DNA concentrations of each band are considered. Interdelta analysis based on a smaller fraction of bands with intermediate sizes between 100 and 1000 bp yields the highest reproducibility.
Antibacterial activity of stevioside towards food‐borne pathogenic bacteria
Authors: Puri Munish , Sharma Deepika 
Published: May 2011

AbstractThis study determines the inhibitory effect of Stevia rebaudiana leaf extracts and its purified bioactive compound ‘stevioside’ against food‐related pathogens. The S. rebaudiana solvent extracts (1000 μg/mL) displayed antibacterial activity to Serratia marcescens, Klebsiella pneumoniae, Bacillus cereus, Pseudomonas aeruginosa, B. subtilis, Alcaligenes denitrificans and Salmonella typhimurium. Of the six solvents, ethanol and acetone extracts displayed the highest zone of inhibition. The bioactive compound from S. rebaudiana was purified by solvent extraction, thin‐layer chromatography followed by structural characterization by spectroscopy evidence. Purified stevioside prevented the growth of tested bacterial species, i.e. B. subtilis, K. pneumoniae and S. typhimurium. Significant zone of inhibition (12 mm) was observed against B. cereus which proposes potential application of stevioside in foods to increase their shelf life.
Experimental and analytical study of the bi‐directional behavior of the triple friction pendulum isolator
Authors: Becker Tracy C. , Mahin Stephen A. 
Published: May 2011

SUMMARYThis paper presents a non‐linear, kinematic model for triple friction pendulum isolation bearings. The model, which incorporates coupled plasticity and circular restraining surfaces for all sliding surfaces, is capable of capturing bi‐directional behavior and is able to explicitly track the movement of each internal component. The model is general so that no conditions regarding bearing properties, which effect the sequence of sliding stages, are required for the validity of the model. Controlled‐displacement and seismic‐input experiments were conducted using the shake table at the University of California, Berkeley to assess the fidelity of the proposed model under bi‐directional motion. Comparison of the experimental data with the corresponding results of the kinematic model shows good agreement. Additionally, experiments showed that the performance of TFP bearings is reliable over many motions, and the behavior is repeatable even when initial slider offsets are present. Copyright © 2011 John Wiley & Sons, Ltd.