bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structural and catalytic properties of Cu2S microrods grown on a three‐dimensional substrate
Authors: Li Zhen , Chen Weihua , Ji Shuying , Mi Liwei , Hou Hongwei , Zheng Zhi 
Published: November 2011

AbstractWe present a facile solution‐phase method for the synthesis of Cu2S microcrystals with rod‐like morphologies by the reaction of sulfur with three‐dimensional substrate copper foam in a mixed solvent of ethylene glycol and deionized water. The lengths of Cu2S microrods are between 80 and 150 μm and the diameter is among 3 to 8 μm. Monodisperse Cu2S microrods self‐assemble into echinus structure. The samples were characterized by X‐ray powder diffraction and scanning electron microscopy. Energy dispersive X‐ray spectroscopy was further used to testifiy the purity of Cu2S. Catalysis performance proved that the obtained Cu2S materials possess superior catalytic efficiency on methylene blue with the assistance of H2O2. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A controllable ionic liquid‐assisted hydrothermal route to prepare CoCO3 crystals and their conversion to porous Co3O4
Authors: Li Haobo , Duan Xiaochuan , Ma Jianmin , Zheng Wenjun 
Published: November 2011

AbstractIn this work, we have synthesized CoCO3 microaggregation, microcubes and nanoplates by an ionic liquid‐assisted hydrothermal method. The morphologies of the CoCO3 crystals depend on the concentration of the ionic liquid and the reaction temperature. Moreover, the as‐prepared CoCO3 crystals can serve as a useful precursor to obtain porous Co3O4 particles with similar morphology by means of calcinations. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Circulating microRNAs as long‐term biomarkers for the detection of erythropoiesis‐stimulating agent abuse
Authors: Leuenberger Nicolas , Jan Nicolas , Pradervand Sylvain , Robinson Neil , Saugy Martial 
Published: November 2011

MicroRNAs (miRNAs) are small, non‐protein coding transcripts involved in many cellular and physiological mechanisms. Recently, a new class of miRNA called ‘circulating miRNAs’ was found in cell‐free body fluids such as plasma and urine. Circulating miRNAs have been shown to be very stable, specific, and sensitive biomarkers.In this paper, we investigate whether circulating miRNAs can serve as biomarkers for erythropoiesis‐stimulating agent abuse. To this end, we analyzed miRNA levels in plasma by miRNA microarrays and quantitative real‐time polymerase chain reaction (PCR). Plasma samples are derived from a clinical study with healthy subjects injected with erythropoiesis‐stimulating agent (C.E.R.A.).Based on microarray results, we observed a significant difference in the levels of miRNAs in plasma after C.E.R.A. injection. We demonstrated that a specific miRNA, miR‐144, exhibit a high increase that lasts 27 days after C.E.R.A. stimulation. Considering the fact that miR‐144 is an essential erythropoiesis agent in different organisms, these findings suggest the possibility of using miR‐144 as a sensitive and informative biomarker to detect C.E.R.A. abuse. Copyright © 2011 John Wiley & Sons, Ltd.
Population decrease of Scirpophaga incertulas Walker (Lepidoptera Pyralidae) under climate warming
Authors: Shi Peijian , Zhong Ling , Sandhu Hardev S. , Ge Feng , Xu Xiaoming , Chen Wei 
Published: November 2011

Abstract
Scirpophaga incertulas Walker is an important agricultural pest in Asia. Only few studies are available on its long‐term population dynamics under climate warming. In this study, we used the linear and generalized additive models (GAMs) to analyze the historical dataset of >50 years on this pest at Xinfeng County of Jiangxi Province, China. The main objective of this study was to explore the effects of density (delayed) dependence and minimum annual temperature (MAT), which indirectly reflects climate warming, on the population dynamics of this pest. We found that both density dependence and MAT have significant influence on the annual population growth rate. The GAMs had relatively better applicability to the dataset than the linear models. Nonparametric model provided satisfactory goodness‐of‐fit (R
2 > 0.5). At Xinfeng County, the MAT had a significant effect on the annual population growth rate of S. incertulas. The annual population growth rate of S. incertulas decreased with increase in MAT. Therefore, S. incertulas population becomes smaller and smaller in Southern China due to climate warming. The current study has two contributions: (1) providing a suitable method for predicting the annual population growth rate of S. incertulas, and (2) demonstrating that climate warming could decrease the S. incertulas population.
A study of AC link and DC link method for wind power generation connected to electric power system
Authors: Yukita Kazuto , Washizu Shinsuke , Nakano Hiroyuki , Torii Akihiro , Ueda Akiteru , Goto Yasuyuki , Ichiyanagi Katsuhiro 
Published: November 2011

AbstractIn this paper, grid‐connection of wind power generators was evaluated from the viewpoint of frequency fluctuation. Wind power generation is a power generation method that depends on natural energy, and there is some concern that it may exert a negative influence on electric power quality. As a result, it is necessary to maintain high electric power quality when wind power generation is connected to the grid. The AC link method, the AC‐DC link method, and the DC link method are alternatives for grid connection of wind power generators. The model system was constructed with the use of a synchronous generator and an induction generator as wind power generator, and verification experiments were performed. Verification experiments using the various grid‐connection methods for each generator were conducted. The steadiest frequency characteristic was obtained in the DC link method. In particular, the stability level was highest in the wind power generation system using the DC link method with a wound‐rotor induction generator. Generally, induction generators are grid‐connected by the AC link method. Therefore, grid‐connection of induction generators by the DC link method appears effective from the viewpoint of frequency fluctuation. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 178(3): 21–30, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.21196
Input power factor control of three‐phase to three‐phase matrix converters
Authors: Ishikawa Shuta , Takeshita Takaharu 
Published: November 2011

AbstractThis paper presents input power factor control of three‐phase to three‐phase matrix converters. The authors propose three kinds of switching patterns for the matrix converters that can realize an arbitrary input‐power‐factor angle between 0 and 2π and reduce the number of commutations in all three phases to four during the control period. Also, the control range of the output voltage reference in the proposed control scheme is derived. The improvement of the input power factor by using the proposed control algorithm has been verified by experiments. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 178(3): 42–52, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.21199
Preparation and Biological Evaluation of Di‐Hetero‐Organometallic‐Containing PNA Bioconjugates
Authors: Gasser Gilles , Neumann Sebastian , Ott Ingo , Seitz Michael , Heumann Rolf , Metzler‐Nolte Nils 
Published: November 2011

AbstractTwo peptide nucleic acid (PNA) oligomers containing two different organometallic moieties, namely derivatives of azidoferrocene (Fc‐N3) and ferrocene carboxylic acid (Fc‐COOH) for PNA5 and derivatives of β‐cymantrenoylpropionic acid [Cym‐CO(CH2)2COOH] and the rhenium bisquinoline tricarbonyl complex [Re(BQ‐N3)(CO)3]Br for PNA6, have been prepared on a solid support by using two different synthetic methods: Peptide coupling and click chemistry. PNA5 and PNA6 were unambiguously characterized by ESI‐MS or MALDI‐TOF MS and their purity checked by LC–MS. As expected, the bioconjugate PNA6 presents two broad and strong absorption bands at 1933 and 2032 cm–1 in its IR spectrum due to the presence of six metal–carbonyl bonds. It has also been demonstrated that the presence of the Mn complex in PNA6 did not significantly alter the fluorescence properties of the Re complex in aqueous solution compared with a previously reported Re–PNA bioconjugate (PNA7). Photoexcitation of PNA6 at 350 nm reveals two distinct emission bands at about 434 and 595 nm in aqueous solutions. PNA6 was successfully electroporated into HeLa cells, as shown by high‐resolution continuum‐source atomic absorption spectroscopy, which was used to measure the concentrations of both Re and Mn. However, no fluorescence of the Re complex in PNA6 was observed in living cells, even at a concentration 20 times higher than that previously reported for PNA7.
Thermal and Photochemical Reactions of Azidoruthenium(III) Complexes of Macrocyclic Tertiary Amines and the Structure of the (Phosphoraniminato)ruthenium(III) Complex trans‐[Ru(14‐TMC)(N3)(NPPh3)]+
Authors: Ho Chi‐Ming , Leung Hiu‐Chi , Wu Shuixing , Low Kam‐Hung , Lin Zhenyang , Che Chi‐Ming 
Published: November 2011

AbstractThe bis(azido)ruthenium(III) complexes, trans‐[Ru(L)(N3)2]+ [L = 14‐TMC (1) and 16‐TMC (4)] have been prepared. These complexes undergo facile thermal or photo‐decomposition in RCN (R = Me, Bu, Ph, 4‐MePh, 2‐MeOPh) solutions to produce the corresponding azidoruthenium(II) complexes trans‐[Ru(L)(N3)(RCN)]+ [L = 14‐TMC, R = Me (2a), Bu (2b), Ph (2c), 4‐MePh (2d), 2‐MeOPh (2e); L = 16‐TMC, R = Me (5a), = Ph (5b)] and cis‐[Ru(Tet‐Me6)(N3)(MeCN)]+ (6). Complex 1 reacted with PPh3, by a nitrogen atom transfer reaction, to give trans‐[Ru(14‐TMC)(N3)(NPPh3)]+ (3) in 80 % yield. The crystal structures of 2e(PF6), 3(PF6) and 5b(ClO4) have been determined by X‐ray diffraction analysis. Complex 3 is the first structurally characterized (phosphoraniminato)ruthenium(III) complex with Ru–N distances of 1.991(7)–2.014(6) Å and a nearly linear Ru–N–P moiety [[ang]Ru–N–P = 168.2(5)–171.5(6)°]. Density functional theory (DFT) calculations on 3 and the proposed [RuV(14‐TMC)(N)(N3)]+ intermediate have been performed.
A Zinc Phosphate Structure with Unusual Double‐Sheet Layers Templated by a Cobalt Hexaammine Complex
Authors: Han Yide , Li Yi , Yu Jihong , Pan Qinhe , Xu Ruren 
Published: November 2011

AbstractA new layered zinc phosphate, [Co(NH3)6]3[Zn8(HPO4)8(PO4)2](PO4) (ZnPO‐CJ68), has been successfully prepared by using cobalt hexaammine as a template. Single‐crystal structure analysis revealed that the structure of ZnPO‐CJ68 contains double‐sheet layers constructed by strict alternation of Zn‐ and P‐centered tetrahedra. The host framework of the double‐sheet layer features unusual 3D microporosity with 8‐ring apertures along three directions. The guest Co(NH3)63+ cations are located not only between but also within the host layers. The shape of the guest Co(NH3)63+ cation perfectly matches that of the void within the layered host framework. ZnPO‐CJ68 was further characterized by powder X‐ray diffraction, thermogravimetric analysis, and inductively coupled plasma spectroscopy.
An Iron(III) Dithiolene Complex as a Functional Model of Iron Hydrogenase
Authors: Begum Ameerunisha , Sarkar Sabyasachi 
Published: November 2011

AbstractThe iron(III) dithiolene complex [PPh4]2[Fe(mnt)2(SPh)] (1, mnt = maleonitrile dithiolate) has a highly distorted square‐pyramidal geometry and an intermediate spin ferric ion (SFe = 3/2), and catalyzes electrochemical H2 evolution at the lowest achievable reduction potential known for iron‐containing electrocatalytic systems to date: Ep = –0.309 V in CH3CN and Ep = –0.53 V in water vs. Ag/AgCl using a modified glassy carbon working electrode. Control experiments suggest that the electrochemical H2 evolution at low potential is promoted by metal‐assisted protonation at the S donors of the thiophenolato and mnt ligands, which liberate H2 gas upon electrochemical reduction.
Organic‐Inorganic Molecular Nano‐Sensors: A Bis‐Dansylated Tweezer‐Like Fluoroionophore Integrating a Polyoxometalate Core
Authors: Carraro Mauro , Modugno Gloria , Fiorani Giulia , Maccato Chiara , Sartorel Andrea , Bonchio Marcella 
Published: November 2011

AbstractFunctionalization of the bis‐lacunary Keggin polyoxotungstate [γ‐SiW10O36]8– has been achieved with a two‐step synthesis, by the covalent attachment of a 3‐aminopropylsilane spacer and further linkage of the dansyl (5‐dimethylamino‐1‐naphthalenesulfonyl‐) residue. The resulting bis‐decorated molecular hybrid [{{(CH3)2N}C10H6SO2NH(CH2)3Si}2O(γ‐SiW10O36)]4– has been isolated and characterized in solution and in the solid state by FTIR, multinuclear NMR, ESI‐MS, UV/Vis, luminescence spectroscopy, dynamic light scattering (DLS), and Scanning Electron Microscopy (SEM). The inorganic polyoxometalate provides a molecular nano‐surface where the dansyl fluorophores are anchored with a tweezer‐type arrangement. The merging of the organic and inorganic domains of the bis‐dansylated complex dictates its fluorescence features, which are observed in the range 375–600 nm, its amphiphilic properties, and the multi‐site recognition/signaling of cationic analytes due to the complementary effect of the tungsten oxide polyanionic surface. Indeed, the interplay of the appended sulfonamide moieties and of the molecular metal oxide fosters an enhanced selectivity for Cu2+ and Pb2+ ion sensing, even in the presence of potentially interfering cations such as Co2+. These latter are preferentially captured by the inorganic platform. By virtue of its hybrid nature, the title fluoroionophore evolves to supramolecular architectures and extended systems in mixed organic solvent/aqueous environment, yielding spherical vesicles and macroporous thin films. Flat polymeric membranes incorporating the hybrid fluorophore can also be obtained, suggesting the generation of heterogeneous sensing devices that integrate both filtration and separation functionalities.
Cyclodextrin Host‐Guest Recognition Approach for Simultaneous Quantification and Voltammetric Studies of Levodopa and Carbidopa in Pharmaceutical Products
Authors: Abbaspour Abdolkarim , Dehghani Elham , Noori Abolhassan 
Published: November 2011

AbstractAn electrochemical sensor for simultaneous quantification of Levodopa (L‐dopa) and Carbidopa (C‐dopa) using a β‐cyclodextrin/poly(N‐acetylaniline) (β‐CD/PNAANI) modified carbon paste electrode has been developed. Preconcentrating effect of β‐CD as well as its different inclusion complex stability with L‐dopa and C‐dopa was used to construct an electrochemical sensor for quantification of these important analytes. The overlapping anodic peaks of L‐dopa and C‐dopa at 810 mV on bare carbon paste electrode resolved in two well‐defined voltammetric peaks at 450 and 880 mV vs. Ag/AgCl, respectively, with a drastic enhancement of the anodic peak currents. Under optimized conditions, linear calibration curves were obtained in the ranges of 0.5–117 µM and 1.6–210 µM with detection limits down to 0.2 and 0.8 µM for L‐dopa and C‐dopa, respectively. The proposed electrode was successfully applied for the determination of L‐dopa /C‐dopa in pharmaceutical formulations and the results were in close agreement with the labeled values.
Electroanalytical Studies on Cobalt(II) Ion‐Selective Sensor of Polymeric Membrane Electrode and Coated Graphite Electrode Based on N2O2 Salen Ligands
Authors: Bandi Koteswara Rao , Singh Ashok Kumar , Kamaluddin  , Jain A. K. , Gupta V. K. 
Published: November 2011

AbstractPoly(vinyl chloride)‐based membranes of salen ligands, 2‐((E)‐((1R,2S)‐2‐((E)‐5‐tert‐butyl‐2‐hydroxybenzylideneamino)cyclohexylimino)methyl)‐4‐tert‐butyl phenol (S1) and 2‐((E)‐((1R,2S)‐2‐((E)‐3,5‐di‐tert‐butyl‐2‐hydroxybenzylideneamino)cyclohexylimino)methyl)‐4,6‐di‐tert‐butylphenol (S2) were fabricated and explored as cobalt(II) selective electrodes. The performance of the polymeric membrane electrode (PME) and coated graphite electrode (CGE) were compared and it was observed that CGE showed a wide working concentration range of 1.1×10−8 to 1.0×10−1 mol L−1 with a limit of detection of 7.0×10−9 mol L−1 exhibiting the Nernstian slope 29.6 mV/decade of activity in the pH range 3.0–9.0. It was used for the determination of cobalt(II) ions in water, soil, beer, pharmaceutical samples and medicinal plants and would be used as an indicator electrode in potentiometric titration with EDTA.
The effect of miR‐7 on behavior and global protein expression in glioma cell lines
Authors: Lu Ze Jun , Liu Sheng Yong , Yao Yu Qin , Zhou Yong Jun , Zhang Shuang , Dai Lei , Tian Hong Wei , Zhou Yan , Deng Hong Xin , Yang Jin Liang , Luo Feng 
Published: November 2011

AbstractMalignant glioma is a common cancer of the nervous system. Despite recent research efforts in cancer therapy, the prognosis of patients with malignant glioma has remained dismal. MicroRNAs are noncoding RNAs that inhibit the expression of their targets in a sequence‐specific manner, and a few have been shown to act as oncogenes or tumor suppressors. Here, we aimed at exploring the precise biological role of microRNA‐7 (miR‐7) and the global protein changes in glioma cell lines transiently transfected with miR‐7. Transfection of miR‐7 into glioma cell lines causes inhibition of cell migration and invasion and suppression of tumorigenesis. Moreover, ectopic expression of miR‐7 inhibits lung metastases of glioma in vivo. Among 65 protein spots with differential expression separated by 2‐DE, 37 proteins were successfully identified by MS/MS analysis. Of those, the 25 downregulated proteins, which include 14‐3‐3ζ, eukaryotic translation initiation factor 5A (EIF5A), and annexin A4, may be downstream targets of miR‐7, a finding that could elucidate some aspects of the behavior of glioma cells at the protein level. In conclusion, the absence of miR‐7 function could cause downstream molecules to switch on or off, resulting in glioma development, invasion, and metastases. MiR‐7‐based gene treatment may be a novel anti‐invasion therapeutic strategy for malignant glioma.
NEIGHBOURHOOD SOCIAL CAPITAL AND INDIVIDUAL SELF‐RATED HEALTH IN WALES
Authors: Tampubolon Gindo , Subramanian S. V. , Kawachi Ichiro 
Published: November 2011

ABSTRACTAlthough neighbourhood social capital can be beneficial for individual health, supporting evidence in the UK is scant. We aim to find the net effect of neighbourhood social capital and deprivation on individual health beyond sociodemographic composition of neighbourhood. We propose a multilevel path analytic model of health to delineate complex pathways involving neighbourhoods (measured as local super output area) and individuals. Analysis of the most recent data containing independent measures of neighbourhood social capital shows that neighbourhood social capital appears to be associated with benefits in some aspects of individual health in the Welsh setting. The improvement stands beyond individual determinants and neighbourhood deprivation. Social scientists and public health officials have reason to continue focusing on the neighbourhoods as well as the individuals to improve the health of the population. Copyright © 2011 John Wiley & Sons, Ltd.
Association of dietary fat intakes with risk of esophageal and gastric cancer in the NIH‐AARP diet and health study
Authors: O'Doherty Mark G. , Freedman Neal D. , Hollenbeck Albert R. , Schatzkin Arthur , Murray Liam J. , Cantwell Marie M. , Abnet Christian C. 
Published: November 2011

AbstractThe aim of our study was to investigate whether intakes of total fat and fat subtypes were associated with esophageal adenocarcinoma (EAC), esophageal squamous cell carcinoma (ESCC), gastric cardia or gastric noncardia adenocarcinoma. From 1995–1996, dietary intake data was reported by 494,978 participants of the NIH‐AARP cohort. The 630 EAC, 215 ESCC, 454 gastric cardia and 501 gastric noncardia adenocarcinomas accrued to the cohort. Cox proportional hazards regression was used to examine the association between the dietary fat intakes, whilst adjusting for potential confounders. Although apparent associations were observed in energy‐adjusted models, multivariate adjustment attenuated results to null [e.g., EAC energy adjusted hazard ratio (HR) and 95% confidence interval (95% CI) 1.66 (1.27–2.18) p for trend <0.01; EAC multivariate adjusted HR (95% CI) 1.17 (0.84–1.64) p for trend = 0.58]. Similar patterns were also observed for fat subtypes [e.g., EAC saturated fat, energy adjusted HR (95% CI) 1.79 (1.37–2.33) p for trend <0.01; EAC saturated fat, multivariate adjusted HR (95% CI) 1.27 (0.91–1.78) p for trend = 0.28]. However, in multivariate models an inverse association for polyunsaturated fat (continuous) was seen for EAC in subjects with a body mass index (BMI) in the normal range (18.5–<25 kg/m2) [HR (95% CI) 0.76 (0.63–0.92)], that was not present in overweight subjects [HR (95% CI) 1.04 (0.96–1.14)], or in unstratified analysis [HR (95% CI) 0.97 (0.90–1.05)]. p for interaction = 0.02. Overall, we found null associations between the dietary fat intakes with esophageal or gastric cancer risk; although a protective effect of polyunsaturated fat intake was seen for EAC in subjects with a normal BMI.
Magnesium used in bioabsorbable stents controls smooth muscle cell proliferation and stimulates endothelial cells in vitro
Authors: Sternberg Katrin , Gratz Matthias , Koeck Kathleen , Mostertz Joerg , Begunk Robert , Loebler Marian , Semmling Beatrice , Seidlitz Anne , Hildebrandt Petra , Homuth Georg , Grabow Niels , Tuemmler Conny , Weitschies Werner , Schmitz Klaus‐Peter , Kroemer Heyo K. 
Published: November 2011

AbstractMagnesium‐based bioabsorbable cardiovascular stents have been developed to overcome limitations of permanent metallic stents, such as late stent thrombosis. During stent degradation, endothelial and smooth muscle cells will be exposed to locally high magnesium concentrations with yet unknown physiological consequences. Here, we investigated the effects of elevated magnesium concentrations on human coronary artery endothelial and smooth muscle cell (HCAEC, HCASMC) growth and gene expression. In the course of 24 h after incubation with magnesium chloride solutions (1 or 10 mM) intracellular magnesium level in HCASMC raised from 0.55 ± 0.25 mM (1 mM) to 1.38 ± 0.95 mM (10 mM), while no increase was detected in HCAEC. Accordingly, a DNA microarray‐based study identified 69 magnesium regulated transcripts in HCAEC, but 2172 magnesium regulated transcripts in HCASMC. Notably, a significant regulation of various growth factors and extracellular matrix components was observed. In contrast, viability and proliferation of HCAEC were increased at concentrations of up to 25 mM magnesium chloride, while in HCASMC viability and proliferation appeared to be unaffected. Taken together, our data indicate that magnesium halts smooth muscle cell proliferation and stimulates endothelial cell proliferation, which might translate into a beneficial effect in the setting of stent associated vascular injury. © 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012.