bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Effects of Tricyclazole Treatment on Aquatic Invertebrates in a Rice Paddy Field
Authors: Rossaro Bruno , Marziali Laura , Cortesi Paolo 
Published: December 2012

AbstractThe benthic macro‐invertebrate community response to tricyclazole treatments in an experimental rice paddy field was analyzed using univariate and multivariate statistical analysis. The observed community presented low species diversity, dominated by the gastropods Gyraulus albus and Physa fontinalis, the oligochaetes Branchyura sowerbyi, and the hirudinea Alboglossiphonia heteroclita. No significant effect was detected following tricyclazole treatments, while a moderate shift in community composition was observed during the sampling period, with gastropods prevailing at the end of the experiment. Multivariate classification tree analysis emphasized the importance of sampling date over tricyclazole treatments. The limited period of submersion of the rice paddy field, the low oxygen content and the high water temperatures are supposed to be the reasons of the low community diversity observed.
Removal of Basic Textile Dyes in Single and Multi‐Dye Solutions by Adsorption: Statistical Optimization and Equilibrium Isotherm Studies
Authors: Turabık Meral , Gozmen Belgin 
Published: December 2012

AbstractThe removal of three basic dyes by adsorption onto bentonite was investigated for single, binary, and ternary solutions in a batch system. Before and after dye adsorption, bentonite samples were analyzed by using X‐ray fluorescence spectrometer, SEM, and Fourier transform IR spectrometry. The D‐optimal design and response surface methodology were applied in designing the experiments for evaluating the interactive effects of each initial concentrations variable of the dyes in binary systems. Predicted values were found to be in good agreement with experimental values, which defined propriety of the model and the achievement of D‐optimal in optimization of adsorption of binary dye systems. The competitive adsorption results showed that the adsorption amount of a dye was suppressed in the presence and increasing concentrations of second or third dye. For mono‐component isotherm modeling, Langmuir and Freundlich models were applied to equilibrium data of single, binary, and ternary dye solutions, while modified Langmuir, Sheindrof–Rebhun–Sheintuch and modified extended Freundlich models were also applied to equilibrium data of binary dye solutions for multi‐component isotherm modeling. The results showed that the Langmuir was the more suitable model for single dye systems while extended Freundlich model fitted best to the experimental data with the lowest error values for multi‐dye systems.
A scalable parallel minimum spanning tree algorithm for catchment basin delimitation in large digital elevation models
Authors: Do Hiep‐Thuan , Limet Sébastien , Melin Emmanuel 
Published: December 2012

SUMMARYThis paper describes a new fast and scalable parallel algorithm to automatically determine catchment basin of rivers in large digital elevation models (DEMs). This algorithm is based on the construction of a minimal spanning tree, via a hierarchy of graphs, modeling the water route on the DEM. It combines different techniques used in hydrogeology, image processing and graph theory to obtain the most accurate results in terms of geomorphology without any preprocessing. The method tends to exploit the most of the DEMs, avoiding misleading inconsistencies DEMs contain. It has been designed to be entirely parallel and scalable for architectures such as PC clusters. Some experiments are presented to show accuracy, efficiency and scalability on huge DEMs. Copyright © 2012 John Wiley & Sons, Ltd.
Why no cognitive body image feature such as overvaluation of shape/weight in the binge eating disorder diagnosis?
Authors: Grilo Carlos M. 
Published: December 2012

AbstractObjective:Undue influence of body shape or weight on self‐evaluation—referred to as overvaluation—is considered a core feature across eating disorders, but is not a diagnostic requirement for binge eating disorder (BED). This article addresses the relevance of a feature reflecting disturbance in body image for the diagnosis of BED.Method:The distinction between overvaluation of shape/weight and body dissatisfaction is discussed, and empirical research regarding the concurrent and predictive significance of overvaluation of shape/weight for BED is reviewed.Results:The literature suggests that overvaluation does not simply reflect concern or distress commensurate with excess weight, is reliably associated with greater severity of eating‐related psychopathology and psychological distress, and has reliably shown negative prognostic significance.Discussion:Overvaluation of shape/weight warrants consideration as a diagnostic specifier for BED. © 2012 by Wiley Periodicals, Inc. (Int J Eat Disord 2013)
Indiana bat summer maternity distribution: effects of current and future climates
Authors: Loeb Susan C. , Winters Eric A. 
Published: December 2012

AbstractTemperate zone bats may be more sensitive to climate change than other groups of mammals because many aspects of their ecology are closely linked to temperature. However, few studies have tried to predict the responses of bats to climate change. The Indiana bat (Myotis sodalis) is a federally listed endangered species that is found in the eastern United States. The northerly distribution of Indiana bat summer maternity colonies relative to their winter distributions suggests that warmer climates may result in a shift in their summer distribution. Our objectives were to determine the climatic factors associated with Indiana bat maternity range and forecast changes in the amount and distribution of the range under future climates. We used Maxent to model the suitable climatic habitat of Indiana bats under current conditions and four future climate forecasts for 2021–30, 2031–40, 2041–50, and 2051–60. Average maximum temperature across the maternity season (May–August) was the most important variable in the model of current distribution of Indiana bat maternity colonies with suitability decreasing considerably above 28ºC. The areal extent of the summer maternity distribution of Indiana bats was forecasted to decline and be concentrated in the northeastern United States and Appalachian Mountains; the western part of the current maternity range (Missouri, Iowa, Illinois, Kentucky, Indiana, and Ohio) was forecasted to become climatically unsuitable under most future climates. Our models suggest that high temperatures may be a factor in roost‐site selection at the regional scale and in the future, may also be an important variable at the microhabitat scale. When behavioral changes fail to mitigate the effects of high temperature, range shifts are likely to occur. Thus, habitat management for Indiana bat maternity colonies in the northeastern United States and Appalachian Mountains of the Southeast is critical as these areas will most likely serve as climatic refugia.
Phosphogenesis in the 2460 and 2728 million‐year‐old banded iron formations as evidence for biological cycling of phosphate in the early biosphere
Authors: Li Yi‐Liang , Sun Si , Chan Lung S. 
Published: December 2012

AbstractThe banded iron formation deposited during the first 2 billion years of Earth's history holds the key to understanding the interplay between the geosphere and the early biosphere at large geological timescales. The earliest ore‐scale phosphorite depositions formed almost at ~2.0–2.2 billion years ago bear evidence for the earliest bloom of aerobic life. The cycling of nutrient phosphorus and how it constrained primary productivity in the anaerobic world of Archean–Palaeoproterozoic eons are still open questions. The controversy centers about whether the precipitation of ultrafine ferric oxyhydroxide due to the microbial Fe(II) oxidation in oceans earlier than 1.9 billion years substantially sequestrated phosphate, and whether this process significantly limited the primary productivity of the early biosphere. In this study, we report apatite radial flowers of a few micrometers in the 2728 million‐year‐old Abitibi banded iron formation and the 2460 million‐year‐old Kuruman banded iron formation and their similarities to those in the 535 million‐year‐old Lower Cambrian phosphorite. The lithology of the 535 Million‐year‐old phosphorite as a biosignature bears abundant biomarkers that reveal the possible similar biogeochemical cycling of phosphorus in the Later Archean and Palaeoproterozoic oceans. These apatite radial flowers represent the primary precipitation of phosphate derived from the phytoplankton blooms in the euphotic zones of Neoarchean and Palaoeproterozoic oceans. The unbiased distributions of the apatite radial flowers within sub‐millimeter bands do not support the idea of an Archean Crisis of Phosphate. This is the first report of the microbial mediated mineralization of phosphorus before the Great Oxidation Event when the whole biosphere was still dominated by anaerobic microorganisms.
Donor Abilities of Heterocyclic Neutral Lewis Bases in a Nickel(II) Salicylaldehyde 4‐Phenylthiosemicarbazonato Coordination Environment
Authors: Cindrić Marina , Pavlović Gordana , Hrenar Tomica , Uzelac Marina , Ćurić Manda 
Published: December 2012

AbstractEight mononuclear [Ni(sal 4‐Phtsc)·D] thiosemicarbazonato complexes [sal 4‐Phtsc = salicylaldehyde 4‐phenylthiosemicarbazonato ligand; D = imidazole (1), methylimidazole (2), pyridine (3), 4‐aminopyridine (4), 4‐methylpyridine (6), morpholine (7), thiomorpholine (8), 2‐aminophenol (9)] and one dinuclear {[Ni(sal 4‐Phtsc)]2·D}·2DMSO [D = 4,4′‐bipyridine (5)] complex have been prepared by adding the corresponding Lewis base to the methanol suspension of the parent complex [Ni(sal 4‐Phtsc)(H2sal 4‐Phtsc)]·CH3OH. The exchange of the neutral salicylaldehyde 4‐phenylthiosemicarbazone (H2sal 4‐Phtsc) ligand in the parent complex for the appropriate Lewis base has been confirmed by IR spectroscopy and powder X‐ray diffraction (PXRD) in the solid state. The single‐crystal X‐ray diffraction of seven complexes 1 and 3–8 confirmed the formation of the complexes with the NiII ion, coordinated through O,N,S‐donor atoms from the dibasic salicylaldehyde 4‐phenylthiosemicarbazonato ligand and endocyclic N‐donor atom from the neutral ligand D in the form of a distorted square‐planar coordination. NMR spectroscopy in DMF or DMSO and quantum mechanical calculations have been performed in order to explain and compare the stability of the complexes in solution, depending on the polarity of solvents in the context of donor properties and the nucleophilicity of the heterocyclic Lewis base. The single‐crystal X‐ray data enables a comparison with calculated standard Gibbs energies of binding in the context of crystal packing forces, leading to a general conclusion that the stability of the mononuclear complexes results in the formation of more stable hydrogen‐bonded cyclic dimers as a crystal packing pattern.
Structure and Magnetism of the Iron(III) Spin‐Crossover Complex [FeIII{N‐ethyl‐N‐(2‐aminoethyl)salicylaldiminate}2]ClO4
Authors: Sheu Chou‐Fu , Chen Szu‐Miao , Lee Gene‐Hsiang , Liu Yi‐Hung , Wen Yuh‐Sheng , Lee Jey‐Jau , Chuang Yu‐Chun , Wang Yu 
Published: December 2012

AbstractA water‐containing iron(III) complex, [FeIII(SalEen)2]ClO4·0.5H2O [1, SalEen = N‐ethyl‐N‐(2‐aminoethyl)salicylaldiminate], and an unsolvated complex, [FeIII(SalEen)2]ClO4 (2), are synthesized and structurally characterized. Complex 1 crystallizes in a polar orthorhombic space group Fdd2, whereas 2 crystallizes in a monoclinic space group P21/c. The presence or absence of water molecules results in different molecular packings, which give rise to different magnetic properties. The temperature dependent magnetic measurements show very gradual spin transitions for both 1 and 2; the iron(III) center is in the high‐spin (HS) state with S = 5/2 at 350 K and is in the low‐spin (LS) state with S = 1/2 below 30 K for 1 (T1/2 = 155 K) and at 120 K for 2 (T1/2 = 230 K). The crystal structures of the HS and LS states for both 1 and 2 are characterized. In addition, the structure of 1 at 150 K is also investigated. The Fe–N and Fe–O bond lengths are 0.14 and 0.03 Å shorter in the LS state than those in the HS state. The octahedral distortion in the iron(III) coordination geometry, expressed as Σ and Θ parameters, is slightly larger in the HS than in the LS state.
Tin‐Mediated Route to Polytungstates of RhII and PdII
Authors: Sokolov Maxim N. , Kalinina Irina V. , Peresypkina Eugenia V. , Moroz Nikolay K. , Naumov Dmitry Yu. , Fedin Vladimir P. 
Published: December 2012

AbstractThree polyoxotungstates of SnII, PdII, and RhII, Na8[H2SnW12O42]·nH2O [1, n = 22.75 (1a) and n = 31.10 (1b)], Na2K(H)[Pd(H2O)4][H2W12O48{Pd(H2O)3}2]·10H2O (2), and Na8[Rh2(H2O)2(W5O18)2]·21.25H2O (3) were obtained. The complexes were characterized by X‐ray analysis, solid‐state 1H NMR spectroscopy, IR spectroscopy, thermogravimetric analysis, and elemental analysis.
Synthesis of 2‐Ethyl‐19‐nor Analogs of 1α,25‐Dihydroxyvitamin D3
Authors: Laplace Duchan R. , Van Overschelde Michel , De Clercq Pierre J. , Verstuyf Annemieke , Winne Johan M. 
Published: December 2012

AbstractThe synthesis of two new A‐ring precursors, useful for the convergent assembly of 2α‐ethyl and 2β‐ethyl derivatives of 19‐nor‐1α,25‐dihydroxyvitamin D3, is described. These building blocks were prepared in 14 steps from quinic acid, which led to a new and practical synthesis of 2α‐ethyl‐14‐epi‐19‐nor‐20‐epi‐23‐yne‐1,25(OH)2D3, an analog that shows a remarkably low calcemic effect in mice, while retaining the ability to promote cell differentiation and to inhibit cell proliferation in a number of human cancer cell lines.
Cell‐free microRNAs as diagnostic, prognostic, and predictive biomarkers for lung cancer
Authors: Zandberga Elīna , Kozirovskis Viktors , Ābols Artūrs , Andrējeva Diāna , Purkalne Gunta , Linē Aija 
Published: December 2012

AbstractLung cancer is the most common cancer worldwide, accounting for over 1.37 million deaths annually. The clinical outcome and management of lung cancer patients could be substantially improved by the implementation of non‐invasive biomarker assays for the early detection, prognosis as well as prediction and monitoring of treatment response. MicroRNAs (miRNAs) have been implicated in the regulation of virtually all signaling circuits within a cell and their dysregulation has been shown to play an essential role in the development and progression of cancer. Recently, miRNAs were found to be released into the circulation and to exist there in a remarkably stable form. Furthermore, various cancers were shown to leave specific miRNA fingerprints in the blood of patients suggesting that cell‐free miRNAs could serve as non‐invasive biomarkers for the detection or monitoring of cancer and putative therapeutic targets. Since that, a considerable effort has been devoted to decode the information carried by circulating miRNAs. In the current review, we give an insight into the mechanisms of miRNA release into the bloodstream, their putative functional significance and systematically review the studies focused on the identification of cell‐free miRNAs with the diagnostic, prognostic, and predictive significance in lung cancer and discuss their potential clinical utility. © 2012 Wiley Periodicals, Inc.
the 11q13‐q14 amplicon: Clinicopathological correlations and potential drivers
Authors: Wilkerson Paul M. , Reis‐Filho Jorge S. 
Published: December 2012

AbstractAmplification at 11q13‐q14 is a common event in cancers from multiple anatomical sites. This complex amplicon has multiple cores and several genes have been put forward as potential “drivers.” In this review, based on the technical advancements of the last decade, which resulted in methods allowing for a deeper genomic and functional genomic characterization of amplicons and their drivers, we discuss the current definitions of amplicons and driver genes, the clinical and biological significance of the 11q13‐q14 amplicon in distinct types of human cancer, its coamplification partners, and the roles of various genes located within the amplicon as potential “drivers.” Finally, we appraise the available data for novel therapies targeting genes mapping to this amplicon. © 2012 Wiley Periodicals, Inc.
Mesoporous Silica‐coated Magnetic Nanoparticles for Mixed Hemimicelles Solid‐phase Extraction of Phthalate Esters in Environmental Water Samples with Liquid Chromatographic Analysis
Authors: Liu Pei‐Lu , Xu Ye‐Ping , Zheng Ping , Tong Hong‐Wu , Liu Yu‐Xin , Zha Zheng‐Gen , Su Qing‐De , Liu Shao‐Min 
Published: December 2012

AbstractTo extract, preconcentrate and determine the trace level of environmental contaminants, a novel mixed hemimicelles solid‐phase extraction (MHSPE) method based on mesoporous silica‐coated magnetic nanoparticles (Fe3O4/meso‐SiO2 NPs) as adsorbent was developed for extraction of phthalate esters from water samples. The Fe3O4/meso‐SiO2 NPs were synthesized by using a combination of hydrothermal method and sol‐gel method. The obtained Fe3O4/meso‐SiO2 NPs possessed a large surface area (570 m2/g), superparamagnetism, and uniform mesopores (2.8 nm). MHSPE parameters, such as the amount of surfactant, pH of sample, shaking and separation time, eluent and breakthrough volume that may influence the extraction of analytes greatly, were further investigated. Under the optimized conditions, the extraction was completed in 20 min and a concentration factor of 500 was achieved by extracting 250 mL water sample. Detection limits obtained of butyl‐benzyl phthalate (BBP), di‐n‐butyl phthalate (DnBP), di‐(2‐ethylhexyl) phthalate (DEHP) and di‐n‐cotyl phthalate (DnOP) were 12, 21, 12, and 32 ng/L, respectively. The proposed method exhibited high extraction efficiency and relatively short time for extracting the target compounds.
Determination of Organophosphorus Pesticides Based on BDD Electrode Modified with Au/chitosan Fiber
Authors: Jin Huali , Liu Yong , Wei Min 
Published: December 2012

AbstractThe Au/chitosan fiber was firstly prepared by electrospinning and chemical reduction method and used to modify BDD electrode for the detection of methyl parathion. The results indicated that Au/chitosan fiber‐modified BDD electrode could improve the electrocatalytic activity, accelerate response, enhance the sensitivity, and reduce the detection limit, as compared with the bare BDD electrode. The repeatability and stability of Au/chitosan fiber‐modified BDD electrode was also studied. For the detection of methyl parathion in the apple juice samples, Au/chitosan fiber‐modified BDD electrode obtained favorable results and ideal recovery rate.
Photo‐physical Properties of N‐methyl‐3,4‐fulleropyrrolidine and Its Derivatives: A DFT and TD‐DFT Investigation
Authors: Tai Chin‐Kuen , Hsieh Wei‐Yi , Yeh Pao‐Ling , Chiu Houn‐Lin , Wang Bo‐Cheng 
Published: December 2012

AbstractA series of N‐methyl‐3,4‐fulleropyrrolidine (NMFP) derivatives were designed by selecting different π‐conjugated linkers and electron‐donating groups as D‐π‐A and D‐A systems. The optimised structures and photo‐physical properties of NMFP and its derivatives have been determined using density functional theory (DFT) and time‐dependent density functional theory (TD‐DFT) methods with the B3LYP functional and the 6‐31G basis set. According to the computation analysis, both the π‐conjugated linkers and the electron‐donating groups can influence the electronic and photo‐physical properties of the NMFP derivatives. Our calculated results demonstrated that the electron‐donating groups, with significant electron‐donating ability, had the tendency to increase the highest occupied molecular orbital (HOMO) energy. The π‐conjugated linkers with lower resonance energy decreased the lowest occupied molecular orbital (LUMO) energy and caused a significant decrease in the energy gap (Eg) between the EHOMO and ELUMO. A Natural Bond Orbital (NBO) analysis examines the effect of the electron‐donating group, π conjugated linker, and electron‐withdrawing group for these NMFP derivatives. For the NMFP derivatives, a projected density of state (PDOS) analysis demonstrated that the electron density of HOMO and LUMO are concentrated on the electron‐donating group and the π‐conjugated linker, respectively. A TD‐DFT/B3LYP calculation was performed to calculate the electronic absorption spectra of these NMFP derivatives. Both the electron‐donating group and the π‐conjugated linker contribute to the major absorption peaks, which are assigned as HOMO to LUMO transitions and are red‐shifted relative to those of non‐substituted NMFP.
Electrocatalytic Oxidation and Determination of Nitrite at Multi‐walled Carbon Nanotubes Modified Carbon Ceramic Electrode
Authors: Majidi Mir Reza , Naseri Abdolhossein , Panahian Sajjad , Baj Reza Fadakar Bajeh 
Published: December 2012

AbstractIn the present work, the electrochemical oxidation of nitrite on carbon ceramic electrode (CCE) modified with multi‐walled carbon nanotubes (MWCNTs) was investigated. The modified electrode exhibited catalytic activity toward the electrooxidation of nitrite. Experimental parameters such as solution pH, scan rate, concentration of nitrite and nanotubes amount were studied. It was shown nitrite can be determined by differential pulse voltammetry (DPV) and hydrodynamic amperometry (HA) using the modified electrode. Under the optimized conditions the calibration plots are linear in the concentration ranges of 15‐220 and 50‐3000 μM with limit of detections of 4.74 and 35.8 μM for DPV and HA, respectively. The modified electrode was successfully applied for analysis of nitrite in spinach sample. The results were favorbly compared to those obtained by UV‐Visible spectrophotometric method. The results of the analysis suggest that the proposed method has promise for the routine determination of nitrite in the examined products.
A Simple, Efficient and Green Procedure for Knoevenagel Condensation in Water or under Solvent‐free Conditions
Authors: Yu Ya‐Qin , Wang Zhong‐Liang 
Published: December 2012

Abstract1,4‐Diazabicyclo[2.2.2]octane was used as an efficient catalyst in the Knoevenagel condensation reaction of various kinds of aromatic/aliphatic/heterocyclic/αβ‐unsaturated aldehydes and ketones with active methylene compounds. This is a convenient and rapid method for Knoevenagel condensation, which affords the corresponding substituted electrophilic alkenes in excellent yields. The reaction condition is mild and the method is operationally simple. The products, only E‐isomers were detected, did not need to be purified. The use of water as the reaction medium makes the process environmentally benign. The catalysts can be recycled six times without activity loss.
Simultaneous determination of quinoxaline‐1,4‐dioxides in feeds using molecularly imprinted solid‐phase extraction coupled with HPLC
Authors: He Qianqian , Fang Binghu , Su Yijuan , Zeng Zhenling , Yang Jianwen , He Limin , Zeng Dongping 
Published: December 2012

A simple, selective, and reproducible molecularly imprinted SPE coupled with HPLC method was developed for monitoring quinoxaline‐1,4‐dioxides in feeds. Molecularly imprinted polymers were synthesized in methanol using mequindox (MEQ) as template molecule and acrylamide as functional monomer by bulk polymerization. Under the optimum SPE conditions, the novel polymer sorbents can selectively extract and enrich carbadox, MEQ, quinocetone, and cyadox from a variety of feeds. The molecularly imprinted SPE cartridge was better than nonimprinted, C18, and HLB cartridges in terms of both recovery and precision. Mean recoveries of four quinoxaline‐1,4‐dioxides from six kinds of feeds spiked at 1.0, 10, and 100 mg/kg ranged between 75.2 and 94.7% with RSDs of less than 10%. The decision limits (CCαs) and the detection capabilities (CCβs) of four analytes were 0.15–0.20 mg/kg and 0.44–0.56 mg/kg, respectively. The class selectivity of the polymers was evaluated by checking three drugs with different molecular structures to that of MEQ.