bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and Characterization of Copper Undecaarylcorroles and the First Undecaarylcorrole Free Base
Authors: Gao Di , Canard Gabriel , Giorgi Michel , Balaban Teodor Silviu 
Published: November 2012

AbstractThe Suzuki cross‐coupling reaction of copper β‐octabromo‐meso‐triarylcorroles with arylboronic acids led to various copper peraryl‐substituted corroles 4a–c, 5a–c, and 6a–c. The crystal structures of complexes 4b, 5a, 5b, 6a, 6b, and 6c show that their saddling dihedral angles strongly depend on the nature of the meso substituents, whereas the β‐aryl substituents induce a significant redshift of their UV/Vis absorption maxima. Copper corrole 5c was successfully demetalated to produce the corresponding undecaarylcorrole free base 7. The crystal structure of 7 revealed that the introduction of 11 bulky aryl groups on the corrole ring did not produce unusual distortions in the macrocycle of the free base.
Synthesis of Aryl and Arylmethyl Phosphonates by Cross‐Coupling of Aryl or Arylmethyl Halides (X = I, Br and Cl) with Diisopropyl H‐Phosphonate
Authors: Xu Kai , Hu Hao , Yang Fan , Wu Yangjie 
Published: November 2012

AbstractAn efficient and generally applicable protocol for the palladacycle‐catalysed arylation or K2CO3‐promoted arylmethylation of diisopropyl H‐phosphonate has been developed. The remarkable features of the palladacycle‐catalysed arylation reaction include wide substrate scope (aryl iodides, bromides and chlorides), significant shortening of the reaction time (2 or 3 h) and a low catalyst loading of 1 mol‐%. Note that with the base K2CO3 as promoter, arylmethylation could be achieved without any palladium catalyst. Moreover, the first example of a palladium‐catalysed phosphonation of inactive electron‐rich aryl chlorides with tBuOK as the base has been realized. This result could be considered an important improvement and complement to earlier work of Montchamp and Han, whose catalytic systems are typically compatible with electron‐deficient and electron‐neutral aryl chlorides.
All‐Solid‐State pH Sensor Used in Oil Drilling Mud
Authors: Lorant Stéphanie , Bohnke Odile , Brévière Jérôme , Bohnke Claude 
Published: November 2012

AbstractA new all‐solid‐state pH sensor combining an Ion‐Selective Electrode (ISE) for pH measurements and an all‐solid‐state reference electrode using a lithium ion conducting ceramic is presented. The use of a liquid internal reference in commercialized pH and reference electrodes leads to important drawbacks that considerably limit their use for in‐situ measurements. The manufacturing and properties of an all‐solid‐state reference electrode made of the ceramic Li0.3La0.57TiO3 (LLTO) and an all‐solid‐state pH microelectrode are described. Both electrodes are combined to prepare an all‐solid‐state pH sensor which can be used in different applications such as medicine, food industry or oil or water drilling industries.
Determination of Xenoestrogenic Compounds Using a Nanostructured Biosensing Device
Authors: Gurban Ana‐Maria , Rotariu Lucian , Marinescu Virgil Emanuel , Bala Camelia 
Published: November 2012

AbstractA ternary composite material based on Prussian blue, single‐walled carbon nanotubes and 1‐butyl‐3‐methylimidazolium hexafluorophosphate was prepared and tested for electrochemical detection of H2O2. The sensor allows amperometric detection of H2O2 at −0.05 V, with a sensitivity of 137 mA M−1⋅cm−2. The nanocomposite provides a favorable microenvironment for immobilization of horseradish peroxidase (HRP). Determination of xenoestrogenic compounds was performed by enzymatic oxidation at the surface of modified screen printed biosensor in the presence of H2O2. The developed electrochemical biosensors exhibited high sensitivity, low detection limits, good operational and storage stability, for detection of 4‐t‐butylphenol, 4‐t‐octylphenol, 4‐n‐nonylphenol and 4‐n‐nonylphenol ethoxylate.
The Role of PANI/Nafion on the Performance of ORR in Gas Diffusion Electrodes of PEM Fuel Cell
Authors: Gharibi Hussein , Faraji Monireh , Kheirmand Mehdi 
Published: November 2012

AbstractIn this work, gas diffusion electrodes were fabricated from Nafion and polyaniline (PANI) nanofibers. The goal of this work was to find the optimal combination of Nafion and polyaniline in gas diffusion electrodes. The electrodes were evaluated for oxygen reduction reaction effectiveness, and their electrochemical properties were investigated by using electrochemical techniques, and PEM single cell. The results revealed that electrodes containing both Nafion and polyaniline worked more efficiently than electrodes containing either Nafion or polyaniline only. The optimum combination is noted as 0.6 mg/cm2 PANI and 0.4 mg/cm2 Nafion.
Voltammetric Determination of Acibenzolar‐S‐Methyl Using a Renewable Silver Amalgam Film Electrode
Authors: Guziejewski Dariusz , Brycht Mariola , Skrzypek Sławomira , Nosal‐Wiercińska Agnieszka , Ciesielski Witold 
Published: November 2012

AbstractAcibenzolar‐S‐methyl (ASM) is a novel fungicide applied for crop protection. A renewable silver amalgam film electrode was used for the determination of ASM in pH 3.4 BrittonRobinson buffer using square wave adsorptive stripping voltammetry (SW AdSV). The parameters of the method were optimized. The electroanalytical procedure made possible to determine ASM in the concentration range of 5×10−8–3×10−7 mol L−1 (LOD=4.86×10−9, LOQ=1.62×10−8 mol L−1). The effect of common interfering pesticides and heavy metal ions was checked. The validated method was applied in ASM determination in spiked water samples.
Utility stocks poised to fall off the dividend tax cliff?
Authors: Scheig Gregory E. 
Published: November 2012

AbstractFor investors, one of the most pressing questions is whether the recent presidential election and the pending expiration of Bush‐era tax cuts will result in higher dividend taxes. At the end of this year, the tax changes made in 2002 and 2003 will expire, and if Congress does not act, the tax code will revert to what it was prior to those changes, with significantly higher tax rates for dividend income and capital gains. In 2003, the tax code was altered to bring the tax rate on dividend income down to 15 percent, to match the tax rate on capital gains. For high‐income investors, the rates on dividends are expected to revert to 40 percent and the rates on capital gains to 20 percent.
State regulation: Regulatory risks in tight oil and gas development
Authors: Wiseman Hannah 
Published: November 2012

AbstractThe discovery of “tight” gas and oil resources—reserves in low‐permeability shales, tight sandstones, and coalbeds below US soils1—is not new. Indeed, the Railroad Commission of Texas sets 1981 as the field discovery date for the Barnett Shale, one of the most productive low‐permeability formations developed so far.2 Only recently, however, have oil and gas operators produced these resources in quantities sufficient to force them to the forefront of the US energy picture. As natural gas production, in particular, has expanded, prices have dropped, and gas has become a more prominent fuel for electricity generation.3
Public relations: Managing NIMBY issues before they manage you
Authors: Severson Gary 
Published: November 2012

AbstractThose who are responsible for siting and permitting site‐specific or linear facilities are well aware that in today's environment of regulatory requirements, polarized politics, and litigation, citizen opposition to proposed projects can be daunting. Determined citizens have successful track records of delaying projects, driving up project costs, and blocking projects that are technically sound and necessary. To relegate the causes of citizen opposition to a few selfish people who do not want the project in their backyards is to miss the crux of grassroots citizen activism.
Executive functioning in individuals with schizophrenia and/or cocaine dependence
Authors: Benaiges Irina , Serra‐Grabulosa Josep Maria , Prat Gemma , Adan Ana 
Published: November 2012

ObjectiveAlthough little is known about neurocognition in Dual Diagnosis, it has been suggested that Schizophrenia (SZ) patients with comorbid substance use belong to a subgroup with lower genetic vulnerability to develop SZ and, consequently, they show better executive and social premorbid functioning. The first aim of this study was to assess the executive functioning, and the second one was to explore the effect of age of onset of substance use in neurocognition in SZ patients with cocaine dependence.MethodsThe total sample consisted of 95 male patients, aged 20 to 60 years, divided in three groups: one group with SZ and cocaine dependence (SZ+; n = 30), another group with SZ without cocaine dependence (SZ−; n = 30), and a control group with cocaine dependence without psychiatric comorbidity (COC; n = 35).ResultsWe found a better executive functioning in both SZ+ and COC than SZ−. We observed a worse performance of SZ+ patients compared with COC in cognitive set‐shifting regardless the age of onset of consumption.ConclusionsThe results agree with the hypothesis of a lower genetic vulnerability in SZ+ patients to develop psychosis compared with SZ−, who develop it without any additional trigger. However, future research is needed to clarify the current knowledge gaps. Copyright © 2012 John Wiley & Sons, Ltd.
COMPETITION AND CASCADES IN MARKETS: AN AGENT‐BASED MODEL OF ENDOGENOUS MERGERS
Authors: Zedan Camillia , Ianni Antonella , Bullock Seth 
Published: November 2012

SUMMARYWe present an agent‐based model of endogenous merger formation in a market with turnover of market participants. We describe the dynamics of the model and identify the conditions under which market competition is sufficiently disrupted to prompt extended periods during which mergers are desirable. We also demonstrate how merger waves can be triggered by industry shocks and firm overconfidence. Copyright © 2012 John Wiley & Sons, Ltd.
Inhibition of Human MDR1 and BCRP Transporter ATPase Activity by Organochlorine and Pyrethroid Insecticides
Authors: Bircsak Kristin M. , Richardson Jason R. , Aleksunes Lauren M. 
Published: November 2012

ABSTRACTDespite the growing evidence suggesting that pesticides contribute to chronic diseases, there is a limited understanding of how these chemicals are removed from cells and whether pesticides can alter the disposition of drugs. The present study examined the effects of two classes of insecticides (organochlorine and pyrethroid) on the ATPase activity of the human multidrug resistance protein 1 (MDR1) and breast cancer resistance protein (BCRP) efflux transporters. Using plasma membranes from cells overexpressing MDR1 and BCRP, it was demonstrated that the organochlorine pesticide dichlorodiphenyltrichloroethane (DDT) (o,p'‐DDT and p,p'‐DDT isomers) as well as its metabolite (p,p'‐dichlorodiphenyldichloroethane), inhibit both MDR1 and BCRP ATPase activity. In addition, p,p'‐dichlorodiphenyldichloroethylene, and two pyrethroid pesticides inhibited BCRP ATPase activity between 4 and 7 μM. Additional research is necessary to further characterize the functional inhibition of MDR1 and BCRP activity and determine whether pesticides alter the transporter‐mediated disposition of other chemicals. © 2012 Wiley Periodicals, Inc. J BiochemMol Toxicol 27:157‐164, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/jbt.21458
Chronic exposure to stress hormones alters the subtype of store‐operated channels expressed in H19‐7 hippocampal neuronal cells
Authors: Piron Matthew , Villereal Mitchel L. 
Published: November 2012

AbstractDifferentiating H19‐7 hippocampal precursor cells up‐regulate (∼4.3‐fold) store‐operated channel (SOC) activity; relatively linear current‐voltage curves indicate an ISOC subtype of SOC. In differentiated H19‐7 neurons, the majority of agonist (arginine vasopressin, AVP)‐stimulated Ca2+ entry occurs via SOCs, based on 2‐aminoethyldiphenylborinate (2‐APB) inhibition data and the observation that transient receptor potential C1 (TRPC1) channel knock down cells show a dramatic reduction of thapsigargin‐stimulated store‐operated Ca2+ entry (SOCE) and inhibition of AVP‐stimulated Ca2+ entry. Treatment of H19‐7 cells with the rat stress hormone corticosterone during differentiation induces a significant increase in AVP‐stimulated Ca2+ entry, which is virtually eliminated by 2‐APB, suggesting a corticosterone‐induced increase of SOCE. Corticosterone also enhances AVP‐stimulated Mn2+ entry, confirming an elevated Ca2+ entry pathway, rather than a decreased Ca2+ extrusion. When corticosterone addition is delayed until after H19‐7 cells have fully differentiated, it still elevates SOCE. In corticosterone‐treated H19‐7 cells, the knock down of TRPC1 no longer blocks thapsigargin‐stimulated Ca2+ entry suggesting that the subtype of SOCs expressed in H19‐7 cells is altered by corticosterone treatment. Electrophysiological studies demonstrate that store‐operated currents in corticosterone‐treated H19‐7 cells exhibit a highly inward rectifying current‐voltage curve consistent with an ICRAC subtype of SOCs. Consistent with this finding is the observation that corticosterone treatment of H19‐7 cells increases the expression of the ICRAC channel subunit Orai1. Thus, the subtype of SOCs expressed in H19‐7 hippocampal neurons can be altered from ISOC to ICRAC by chronic treatment with stress hormones. J. Cell. Physiol. 228: 1332–1343, 2013. © 2012 Wiley Periodicals, Inc.
Prevalence of occult hepatitis C virus infection in Iranian patients with lymphoproliferative disorders
Authors: Farahani Maryam , Bokharaei‐Salim Farah , Ghane Masood , Basi Ali , Meysami Parisa , Keyvani Hossein 
Published: November 2012

AbstractOccult HCV infection is a form of chronic HCV infection characterized by absence of detectable anti‐HCV antibodies or plasma HCV‐RNA but presence of HCV‐RNA in liver biopsy and/or peripheral blood mononuclear cells (PBMCs). The aim of this study was to determine the presence of HCV‐RNA in PBMCs of patients with lymphoproliferative disorders. One hundred and four consecutive patients with lymphoproliferative disorders admitted to Firouzgar Hospital from January 2010 to March 2011 were recruited in this cross‐sectional study. A 6‐ml sample of whole blood was taken from the patients, the total RNA was extracted from the samples after the separation of plasma and PBMCs. The HCV‐RNA of the samples was amplified by reverse transcriptase‐nested polymerase chain reaction (RT‐nested PCR). The HCV genotypes of the positive samples were tested using the INNO‐LiPA™ HCV II kit, and the HCV genotypes were then confirmed by sequencing of the 5′‐UTR fragments after the PCR products were cloned into a pJET1.2/blunt cloning vector. The mean age of the patients was 48.3 ± 1.76 years (range: 16–83). HCV‐RNA was found in PBMCs from 2 (1.9%) of the 104 patients. Genotyping showed that the patients were infected with HCV subtype 1a. One patient suffered non‐Hodgkin's lymphoma and the other suffered chronic lymphocytic leukemia. Patients with lymphoproliferative disorders with negative anti‐HCV antibodies and negative plasma HCV‐RNA may have occult HCV infection. Therefore, in the absence of a liver biopsy, the testing of PBMCs for the detection of genomic HCV‐RNA may be beneficial. J. Med. Virol. 85:235–240, 2013. © 2012 Wiley Periodicals, Inc.
Serum hepatitis B surface antigen is correlated with intrahepatic total HBV DNA and cccDNA in treatment‐naïve patients with chronic hepatitis B but not in patients with HBV related hepatocellular carcinoma
Authors: Wang Meirong , Qiu Ning , Lu Shichun , Xiu Dianrong , Yu Jianguo , Wang Xing tai , Lu Fengmin , Li Tong , Liu Xueen , Zhuang Hui 
Published: November 2012

AbstractThe aim of the study was to investigate correlations between intrahepatic hepatitis B virus total DNA, covalently closed circular DNA (cccDNA), and serum HBsAg in treatment‐naïve chronic hepatitis B and HBV related hepatocellular carcinoma (HCC). Liver tissues were taken from 42 HBV related HCC and 36 patients with chronic hepatitis B. A fraction of DNA extracted from liver tissue was digested with a plasmid‐safe ATP‐dependent DNase and used for HBV cccDNA detection. The remaining DNA was used for the detection of HBV total DNA and β‐globin, the latter of which is a housekeeping gene and quantified for normalization by real‐time PCR. Quantitation of serum HBsAg was performed by a chemiluminescence assay. Serum HBsAg had positive correlations with serum HBV DNA (r = 0.636, P < 0.001), intrahepatic HBV total DNA (r = 0.519, P = 0.001) and cccDNA (r = 0.733, P < 0.001) in 36 treatment‐naïve chronic hepatitis B, while HBsAg correlated poorly with DNA (r = 0.224, P = 0.210), intrahepatic total DNA and cccDNA in the tumor (r = 0.351, P = 0.031; r = 0.164, P = 0.324, respectively) and non‐tumor (r = 0.237, P = 0.152; r = 0.072, P = 0.667, respectively) liver tissues of 42 HCC. HBV cccDNA and total DNA were significantly higher in liver tissue from chronic hepatitis B than in tumor and non‐tumor of HCC (P < 0.001). Serum HBsAg and HBV DNA were also higher in chronic hepatitis B than in HCC (P < 0.001). It was concluded that levels of serum HBsAg and intrahepatic cccDNA and total DNA were significantly higher in chronic hepatitis B than in HCC, and significant correlations among them were observed in treatment‐naïve chronic hepatitis B but not in HCC. J. Med. Virol. 85:219–227, 2013. © 2012 Wiley Periodicals, Inc.
Effect of processing conditions on the nutritive value of canola meal and presscake. Comparison of the yellow and brown‐seeded canola meal with the brown‐seeded canola presscake
Authors: Theodoridou Katerina , Yu Peiqiang 
Published: November 2012

AbstractBackgroundCanola, unlike traditional rapeseed, contains low levels of ‘erucic acid’ and ‘glucosinolates’. Canola's industrial processing generally involves separation of the seed into an oil and a meal fraction whereas the intermediate product is called presscake. The objective of this study was to determine the effect of processing conditions on the nutritive value for ruminants and compare the yellow (Brassica juncea) (CM_Y) and the brown‐seeded (B. napus) (CM_B) canola meal and the brown‐seeded (B. napus) (CPC_B) canola presscake.ResultsEither extract was higher (P < 0.05) for CPC_B than for CM_Y and CM_B. CM_Y had a higher (P < 0.05) PB2 and PC compared to CM_B. Truly digestible fractions, except fatty acid, were lower (P < 0.05) for CPC_B. Effective protein degradability of CM_Y was lower (P < 0.05) compared to CM_B or CPC_B. In vitro protein intestinal digestibility for CM_Y was higher (P < 0.05) than for CM_B or CPC_B.ConclusionCPC_B had lower protein but higher oil content than canola meal and is a potential high‐energy supplement source for ruminants. CM_Y had higher crude protein, digestible and metabolizable energy values and low fiber than CM_B. In plant breeding, selection programs are geared towards yellow‐seeded varieties in order to improve the nutritive value of canola meal.© 2012 Society of Chemical Industry
Object‐Based Mapping of Karst Rocky Desertification using a Support Vector Machine
Authors: Xu E.‐Q. , Zhang H.‐Q. , Li M.‐X. 
Published: November 2012

AbstractAccurate and cost‐effective mapping of karst rocky desertification (KRD) is still a challenge at the regional and national scale. Visual interpretation has been utilised in the majority of studies, while an automated method based on pixel data has been investigated repeatedly. An object‐based method coupling with support vector machine (SVM) was developed and tested using Enhanced Thematic Mapper Plus (ETM+) images from three selected counties (Liujiang, Changshun and Zhenyuan) with different karst landscapes in SW China. The method supports a strategy of defining a mapping unit. It combined ETM+ images and ancillary data including elevation, slope and Normalized Difference Vegetation Index images. A sequence of scale parameters estimation, image segmentation, training data sampling, SVM parameters tuning and object classification was performed to achieve the mapping. A quantitative and semi‐automated approach was used to estimate scale parameters for segmenting an object at an optimal scale. We calculated the sum of area‐weighted standard deviation (WS), rate of change for WS, local variance (LV) and rate of change for LV at each scale level, and the threshold of the aforementioned index that indicated the optimal segment level and merge level. The KRD classification results had overall accuracies of 85·50, 84·00 and 84·86 per cent for Liujiang, Changshun and Zhenyuan, respectively, and kappa coefficients are up to 0·8062, 0·7917 and 0·8083, respectively. This approach mapped six classes of KRD and offered a visually appealing presentation. Moreover, it proposed a conceptual and size‐variable object from the classification standard of KRD. The results demonstrate that the application of our method provides an efficient approach for the mapping of KRD. Copyright © 2012 John Wiley & Sons, Ltd.
Development of Mucoadhesive Drug Delivery System Using Phenylboronic Acid Functionalized Poly(D,L‐lactide)‐b‐Dextran Nanoparticles
Authors: Liu Shengyan , Jones Lyndon , Gu Frank X. 
Published: November 2012

AbstractMucoadhesive NP drug carriers have attracted substantial interest as a potential treatment for anterior eye diseases. NPs composed of PLA‐Dex surface functionalized with a mucoadhesive ligand, PBA, were developed as drug carriers with particle sizes ranging from 25 to 28 nm. Using CycA as a model drug, we showed that NPs encapsulated up to 13.7 wt% CycA and exhibited sustained release for up to 5 d in vitro at a clinically relevant dose. We fine‐tuned the PBA density on the NP surface to maximize the mucin‐NP interaction without compromising the particle stability in vitro. This block copolymer conjugate may be useful to improve the bioavailability of topical formulations. magnified image
Compact ultra‐wideband coplanar waveguide fed fan‐shaped antenna with band‐notched characteristic
Authors: Wang Chen , Yan Ze‐Hong , Xu Ping , Li Sheng 
Published: November 2012

AbstractIn this article, a compact coplanar waveguide fed fan‐shaped monopole antenna for ultra‐wideband applications with band‐notched characteristic is presented. The antenna with fan‐shaped structure occupies a small size of 35 × 30 mm2. An arc‐shaped slot locating on the radiating element is used to create the 3.5 GHz band‐notch characteristic. And, good radiation patterns and gains within the operating band have been observed. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:62–65, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27224
A balanced dual‐resonance colpitts VCO in 0.18 μm CMOS
Authors: Jang Sheng‐Lyang , Chen Yao‐Tsu , Chang Chia‐Wei , Huang Jhin‐Fang 
Published: November 2012

AbstractA dual‐resonance balanced voltage‐controlled oscillator (VCO) is proposed to serves as a dual‐band oscillator operated at 3.5 and 8.5 GHz. The VCO consists of two single‐ended dual‐resonance LC‐tank complementary Colpitts oscillators configured in a balanced topology. The proposed VCO has been implemented with the TSMC 0.18 μm 1P6M CMOS technology and the core power consumption is 4.21 mW at the supply voltage of 1.2 V. The figure of merit is −190.22/−190.3 dBc/Hz at high/low band. The die area of the dual‐band VCO is 0.995 × 0.55 mm2. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:194–197, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27234
Design and implementation of a UWB six‐port correlator for 6–9 GHz frequency band
Authors: Mohsin Imran , Karlsson Magnus , Owais Owais , Gong Shaofang 
Published: November 2012

AbstractA compact size six‐port correlator using bandwidth enhancing stubs for the 6–9 GHz ultra wideband radio is presented. The proposed six‐port has a center frequency of 7.5 GHz with 50% relative bandwidth. The correlator is based entirely on microstrip technology for low cost and simple circuit implementation. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:190–193, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27235