bluuebunny/crossref_metadata_2025_split huggingface dataset:
AgI Microplate Monocrystals with Polar {0001} Facets: Spontaneous Photocarrier Separation and Enhanced Photocatalytic Activity
Authors: Kuang Qin , Zheng Xiaoli , Yang Shihe 
Published: January 2014

AbstractElucidating the facet‐dependent photocatalytic activity of semiconductor photocatalysts is important in improving the overall efficiency of photocatalysis. Furthermore, combining facet control with selective deposition of oxidation and/or reduction cocatalysts on specific faces of semiconductor photocatalysts is potentially an effective strategy to synergistically optimize the functionality of photocatalysts. In the present study, high‐purity wurtzite‐type β‐AgI platelet microcrystals with polar {0001} facets were prepared by a facile polyvinylpyrrolidone‐assisted precipitation reaction. The polar‐faceted AgI microplates were used as archetypes to demonstrate preferential diametric migration (i.e., effective separation) of photogenerated electrons and holes along the c axis. Such vectorial electron–hole separation stems from the asymmetric surface structures, which give rise to distinct photoexcited reaction behaviors on the ±(0001) polar facets of wurtzite‐type semiconductors. Furthermore, on selective deposition of Ag and MnOx (1.5<x<2) cocatalysts on the reductive (0001) and oxidative (000$\bar 1$) facets, respectively, photocatalytic activity of the AgI microplates in degrading organic pollutants was dramatically enhanced thanks to the broad light‐absorption range, strong dye‐adsorption ability, and effective spatial separation of photocarriers.
Dipolarity versus Polarizability and Acidity versus Basicity of Ionic Liquids as a Function of Their Molecular Structures
Authors: Schade Alexander , Behme Nicole , Spange Stefan 
Published: January 2014

AbstractThe four empirical solvent polarity parameters according to the Catalán scale—solvent acidity (SA), solvent basicity (SB), solvent polarizability (SP), and solvent dipolarity (SdP)—of 64 ionic liquids (ILs) were determined by the solvatochromic method. The SA parameter was determined solely by using [FeII(1,10‐phenanthroline)2(CN)2] (Fe), the SB parameter by using the pair of structurally comparable dyes 3‐(4‐amino‐3‐methylphenyl)‐7‐phenylbenzo[1,2‐b:4,5‐b′]difuran‐2,6‐dione (ABF) and 3‐(4‐N,N‐dimethylaminophenyl)‐7‐phenylbenzo[1,2‐b:4,5‐b′]‐difuran‐2,6‐dione (DMe‐ABF), and the SP and SdP parameters by using the homomorphic pair of 4‐tert‐butyl‐2‐(dicyanomethylene)‐5‐[4‐(diethylamino)benzylidene]‐Δ3‐thiazoline (Th) and 2‐[4‐(N,N‐dimethylamino)benzylidene]malononitrile (BMN). The separation of SP and SdP for a set of 64 various ILs was performed for the first time. Correlation analyses of SP with physicochemical data related to ionization potentials of anions of ILs as well as with theoretical data show the correctness of the applied method. The found correlations of the Catalán parameters with each other and with the alkyl‐chain length of 1‐alkyl‐3‐methylimidazolium‐type ILs gives new information about interactions within ILs. An analytical comparison of the determined Catalán parameters with the established Kamlet–Taft parameters and the Gutmann acceptor and donor numbers is also presented.
Palladium‐Catalyzed One‐Pot Three‐ or Four‐Component Coupling of Aryl Iodides, Alkynes, and Amines through CN Bond Cleavage: Efficient Synthesis of Indole Derivatives
Authors: Hao Wei , Geng Weizhi , Zhang Wen‐Xiong , Xi Zhenfeng 
Published: January 2014

AbstractAn efficient synthesis of N‐substituted indole derivatives was realized by combining the Pd‐catalyzed one‐pot multicomponent coupling approach with cleavage of the C(sp3)N bonds. Three or four components of aryl iodides, alkynes, and amines were involved in this coupling process. The cyclopentadiene–phosphine ligand showed high efficiency. A variety of aryl iodides, including cyclic and acyclic tertiary amino aryl iodides, and substituted 1‐bromo‐2‐iodobenzene derivatives could be used. Both symmetric and unsymmetric alkynes substituted with alkyl, aryl, or trimethylsilyl groups could be applied. Cyclic secondary amines such as piperidine, morpholine, 4‐methylpiperidine, 1‐methylpiperazine, 2‐methylpiperidine, and acyclic amines including secondary and primary amines all showed good reactivity. Further application of the resulting indole derivatives was demonstrated by the synthesis of benzosilolo[2,3‐b]indole.
Highly Luminescent N‐Doped Carbon Quantum Dots as an Effective Multifunctional Fluorescence Sensing Platform
Authors: Qian Zhaosheng , Ma Juanjuan , Shan Xiaoyue , Feng Hui , Shao Linxiang , Chen Jianrong 
Published: January 2014

AbstractThe doping of carbon quantum dots with nitrogen provides a promising direction to improve fluorescence performance and broaden their applications in sensing systems. Herein we report a one‐pot solvothermal synthesis of N‐doped carbon quantum dots (NCQDs) and the synthesis of a series of NCQDs with different nitrogen contents. The as‐prepared NCQDs were compared with carbon quantum dots (CQDs); the introduction of nitrogen atoms largely increased the quantum yield of NCQDs and highest emission efficiency is up to 36.3 %. The fluorescence enhancement may originate from more polyaromatic structures induced by incorporated nitrogen atoms and protonation of nitrogen atoms on dots. It was found that NCQDs can act as a multifunctional fluorescence sensing platform because they can be used to detect pH values, AgI, and FeIII in aqueous solution. The fluorescence intensity of NCQDs is inversely proportional to pH values across a broad range from 5.0 to 13.5, which indicates that NCQDs can be devised as an effective pH indicator. Selective detection of AgI and FeIII was achieved based on their distinctive fluorescence influence because AgI can significantly enhance the fluorescence whereas FeIII can greatly quench the fluorescence. The quantitative determination of AgI can be accomplished with NCQDs by using the linear relationship between fluorescence intensity of NCQDs and concentration of AgI. The sensitive detection of H2O2 was developed by taking advantage of the distinct quenching ability of FeIII and FeII toward the fluorescence of NCQDs. Cellular toxicity test showed NCQDs still retain low toxicity to cells despite the introduction of a great deal of nitrogen atoms. Moreover, bioimaging experiments demonstrated that NCQDs have stronger resistance to photobleaching than CQDs and more excellent fluorescence labeling performance.
Enzymkinetische Untersuchungen mit Nahrungsergänzungsmitteln und moderner Medizindiagnostik
Authors: Heinzerling Peter , Schanze Sascha 
Published: January 2014

AbstractEnzymkinetische Untersuchungen erfordern in der Regel einen hohen apparativen und analytischen Aufwand und führen in der Schule nicht immer zu optimalen Ergebnissen. In der Schulliteratur wird überwiegend mit Urease gearbeitet. Wir verwenden als Enzymquellen frei verkäufliche Nahrungsergänzungsmittel aus der Apotheke. Analytisch werden die Resultate mit einem Glucometer erfasst. Diese Alltagsgeräte liefern in fünf Sekunden fertige Resultate. Die Experimente waren auch mit Inhibitoren erfolgreich.
Novel Heterobimetallic Radiotheranostic: Preparation, Activity, and Biodistribution
Authors: Adriaenssens Louis , Liu Qiang , Chaux‐Picquet Fanny , Tasan Semra , Picquet Michel , Denat Franck , Le Gendre Pierre , Marques Fernanda , Fernandes Célia , Mendes Filipa , Gano Lurdes , Campello Maria Paula Cabral , Bodio Ewen 
Published: January 2014

AbstractA novel RuII(arene) theranostic complex is presented. It is based on a 1,4,7,10‐tetraazacyclododecane‐1,4,7,10‐tetraacetic acid macrocycle bearing a triarylphosphine and can be tracked in vivo by using the γ emission of 153Sm atoms. Notably, the heteroditopic ligand can be selectively metalated with ruthenium at the phosphorus atom despite the presence of other functionalities that are prone to metal coordination. Subsequent labeling with radionuclides such as 153Sm can then be performed easily. The resulting heterobimetallic complex exhibits favorable solubility and stability properties in biologically relevant media. It also shows in vitro cytotoxicity in line with that expected for this type of metallodrug, and is nontoxic to the organism as a whole. As a proof of concept, initial studies in healthy mice were performed to obtain information about the uptake, biodistribution, and excretion of the radiolabeled complex.
Reorientational Dynamics of Water Confined in Zeolites
Authors: Fogarty Aoife C. , Coudert François‐Xavier , Boutin Anne , Laage Damien 
Published: January 2014

AbstractWe present a detailed molecular‐dynamics study of water reorientation and hydrogen‐bond dynamics in a strong confinement situation, within the narrow pores of an all‐silica Linde type A (LTA) zeolite. Two water loadings of the zeolite are compared with the bulk case. Water dynamics are retarded in this extreme hydrophobic confinement and the slowdown is more pronounced at higher water loading. We show that water reorientation proceeds mainly by large‐amplitude angular jumps, whose mechanism is similar to that determined in the bulk. The slowdown upon hydrophobic confinement arises predominantly from an excluded‐volume effect on the large fraction of water molecules lying at the interface with the zeolite matrix, with an additional minor contribution coming from a structuring effect induced by the confinement.
1D and 2D Thiazole‐Based Copper(II) Coordination Polymers: Synthesis and Applications in Carbon Dioxide Capture
Authors: Rossin Andrea , Tuci Giulia , Giambastiani Giuliano , Peruzzini Maurizio 
Published: January 2014

AbstractThe reaction of different copper(II) salts with a class of thiazole‐based ligands under solvothermal conditions produces three crystalline 1D/2D coordination polymers: [Cu(κ‐N‐thiazole)4(SiF6)]∞ (1 (1D)), {Cu[μ‐(κ‐N:κ‐COO)‐L1]2⋅(H2O)}∞ (2 (2D); HL1=2‐aminothiazole‐5‐carboxylic acid), and {Cu[μ‐(κ‐N:κ‐COO)‐L2]2⋅1.5 (H2O)}∞ (3 (2D); HL2=thiazole‐5‐carboxylic acid). All the materials have been characterized through common solid‐state techniques: single‐crystal (XRD) and (variable‐temperature) powder X‐ray diffraction (PXRD), infrared spectroscopy (IR), thermogravimetric analysis combined with mass spectrometry (TGA‐MS), and BET surface area and pore‐size distribution measurements. Polymer 3 shows a porous structure made of squared channels formed by the ordered stacking of the planar sheets along the a crystallographic axis (inner surface area equal to 15 m2 g−1, as inferred from N2 adsorption at T=77 K on the pre‐activated form), and it has been exploited for CO2 physisorption at ambient temperature (T=303 K) and pressure (p max.=920 torr). A remarkable CO2 uptake equal to 9.0 wt % was recorded under these mild conditions, thereby making the material promising for carbon dioxide capture in post‐combustion flue gas, in which the key factor for a successful performance is the high chemical selectivity for CO2 over N2.
Resilience of Zostera muelleri seagrass to small‐scale disturbances: the relative importance of asexual versus sexual recovery
Authors: Macreadie Peter I. , York Paul H. , Sherman Craig D.H. 
Published: January 2014

AbstractResilience is the ability of an ecosystem to recover from disturbance without loss of essential function. Seagrass ecosystems are key marine and estuarine habitats that are under threat from a variety of natural and anthropogenic disturbances. The ability of these ecosystems to recovery from disturbance will to a large extent depend on the internsity and scale of the disturbance, and the relative importance of sexual versus asexual reproduction within populations. Here, we investigated the resilience of Zostera muelleri seagrass (Syn. Zostera capricorni) to small‐scale disturbances at four locations in Lake Macquarie – Australia's largest coastal lake – and monitored recovery over a 65‐week period. Resilience of Z. muelleri varied significantly with disturbance intensity; Z. muelleri recovered rapidly (within 2 weeks) from low‐intensity disturbance (shoot loss), and rates of recovery appeared related to initial shoot length. Recovery via rhizome encroachment (asexual regeneration) from high‐intensity disturbance (loss of entire plant) varied among locations, ranging from 18‐35 weeks, whereas the ability to recover was apparently lost (at least within the time frame of this study) when recovery depended on sexual regeneration, suggesting that seeds do not provide a mechanism of recovery against intense small‐scale disturbances. The lack of sexual recruits into disturbed sites is surprising as our initial surveys of genotypic diversity (using nine polymorphic microsatellite loci) at these location indicate that populations are maintained by a mix of sexual and asexual reproduction (genotypic diversity [R] varied from 0.24 to 0.44), and populations consisted of a mosaic of genotypes with on average 3.6 unique multilocus genotypes per 300 mm diameter plot. We therefore conclude that Z. muelleri populations within Lake Macquarie rely on clonal growth to recover from small‐scale disturbances and that ongoing sexual recruitment by seeds into established seagrass beds (as opposed to bare areas arising from disturbance) must be the mechanism responsible for maintaining the observed mixed genetic composition of Z. muelleri seagrass meadows.
A Propeller‐Shaped, Triazine‐Linked Porphyrin Triad as Efficient Sensitizer for Dye‐Sensitized Solar Cells
Authors: Zervaki Galateia E. , Papastamatakis Evangelos , Angaridis Panagiotis A. , Nikolaou Vasilis , Singh Manjeet , Kurchania Rajnish , Kitsopoulos Theophanis N. , Sharma Ganesh D. , Coutsolelos Athanassios G. 
Published: January 2014

AbstractA propeller‐shaped, triazine‐linked, unsymmetrical porphyrin triad – consisting of two zinc‐metallated porphyrin units and one free‐base porphyrin unit that is functionalized by a carboxylic acid – has been synthesized by stepwise amination reactions of cyanuric chloride. Photophysical, electrochemical, and DFT studies of the triad revealed no significant electronic interactions between the porphyrin units in the triad ground state but frontier orbital energy levels suitable for use as sensitizer in dye‐sensitized solar cells (DSSCs). Furthermore, the triad can be described as a 2D–π–A system (D: donor, A: acceptor) that has the potential to promote electron transfer and injection into the TiO2 electrode. Solar cells sensitized by the triad were fabricated with two different TiO2 photoanodes, one processed by the paste‐coating (PC) method and the other by the electrophoretic deposition (EPD) method. They were found to exhibit power conversion efficiencies (PCEs) of 3.80 and 4.91 %, respectively. The higher PCE value of the latter is attributed to its larger dye loading, as well as to its enhanced short‐circuit current (Jsc) and higher open‐circuit voltage (Voc) and fill factor (FF) values. In addition, differences in the surface morphology between the two different TiO2 photoanodes result in different electron‐transport kinetics. Electrochemical impedance spectra (EIS) demonstrated that the solar cell with the EPD‐processed photoanode exhibits a shorter electron‐transport time (τd), a longer electron lifetime, and higher charge‐recombination resistance (Rct). The PCE of the latter solar cell was further improved up to 5.56 % by incorporating chenodeoxycholic acid in the dye solution as co‐sensitizer.
One‐Dimensional Structure of an Aluminum Coordination Compound
Authors: Yang Zhi , Li Kai , Ma Xiaoli , Roesky Herbert W. , Hao Pengfei , Zhong Mingdong 
Published: January 2014

AbstractThe reaction of trimethylaluminum with a salen {salenH2 = [N,N′‐bis(salicylidene)ethylenediamine]} ligand in toluene afforded the complex [Me2AlOC6H4CH=NCH2–]n. It shows a one‐dimensional structure in the crystal state with pentacoordinate aluminum. This complex was characterized by 1H and 13C NMR spectroscopy, IR spectroscopy, single‐crystal X‐ray structure, and elemental analysis.
Human temporal lobe epilepsy analyses by tissue proteomics
Authors: Mériaux Céline , Franck Julien , Park Dan Bi , Quanico Jusal , Kim Young Hye , Chung Chun Kee , Park Young Mok , Steinbusch Harry , Salzet Michel , Fournier Isabelle 
Published: January 2014

ABSTRACTAlthough there are many types of epilepsy, temporal lobe epilepsy (TLE) is probably in humans the most common and most often studied. TLE represents 40% of the total epilepsy form of the disease and is difficult to treat. Despite a wealth of descriptive data obtained from the disease history of patients, the EEG recording, imaging techniques, and histological studies, the epileptogenic process remains poorly understood. However, it is unlikely that a single factor or a single mechanism can cause many changes associated with this neuropathological phenomenon. MALDI mass spectrometry imaging (MSI) coupled to protein identification, because of its ability to study a wide range of molecules, appears to be suitable for the preparation of molecular profiles in TLE. Seven neuropeptides have been have been identified in Dental gyrus regions of the hippocampus in relation with TLE pathology. Shot‐gun studies taking into account gender influence have been performed. Tissue microextraction from control (10) toward 10 TLE patients have been analyzed after trypsin digestion followed by separation on nanoLC coupled to LTQ orbitrap. From the shot‐gun analyses, results confirmed the presence of specific neuropeptides precursors and receptors in TLE patients as well as proteins involved in axons regeneration including neurotrophins, ECM proteins, cell surface proteins, membrane proteins, G‐proteins, cytoskeleton proteins and tumor suppressors. Among the tumor suppressors identified, the Leucine‐rich glioma inactivated 1 (LGI1) protein was found. LGI1 gene recently been demonstrated being implicated in heritability of TLE. We have also demonstrate the presence a complete profile of tumor suppressors in TLE patients, 7 have been identified. Refining this analysis taken into account the gender influence in both control and in TLE reflected the presence of specific proteins between male and female and thus mechanisms in pathology development could be completely different. © 2014 Wiley Periodicals, Inc.
The role of the ventral dentate gyrus in olfactory pattern separation
Authors: Weeden Christy S. S. , Hu Nathan J. , Ho Liana U. N. , Kesner Raymond P. 
Published: January 2014

ABSTRACTDorsoventral lesion studies of the hippocampus have indicated that the dorsal axis of the hippocampus is important for spatial processing and the ventral axis of the hippocampus is important for olfactory learning and memory and anxiety. There is some evidence to suggest that the ventral CA3 and ventral CA1 conduct parallel processes for pattern completion and temporal processing, respectively. Studies have indicated that the dorsal dentate gyrus (DG) is importantly involved in processes reflecting underlying pattern separation activity for spatial information. However, the ventral DG is less understood. The current study investigated the less‐understood role of the ventral DG in olfactory pattern separation. A series of odor stimuli that varied on only one level, number of carbon chains (methyl groups), was used in a matching‐to‐sample paradigm in order to investigate ventral DG involvement in working memory for similar and less similar odors. Rats with ventral DG lesions were impaired at delays of 60 sec, but not at delays of 15 sec. A memory‐based pattern separation effect was observed performance was poorest with only one carbon chain separation between trial odors and was highest for trials with four separations. The present study indicates that the ventral DG plays an important role in olfactory learning and memory processes for highly similar odors. The results also indicate a role for the ventral DG in pattern separation for odor information, which may have further implications for parallel processing across the dorsoventral axis for the DG in spatial (dorsal) and olfactory (ventral) pattern separation. © 2014 Wiley Periodicals, Inc.
Reconsidering Boundaries: Human Resource Management in a Networked World
Authors: Swart Juani , Kinnie Nicholas 
Published: January 2014

AbstractIn the twenty‐first century, work activities tend to span organizational boundaries and take place in projects or networks. This cross‐boundary working has major implications for current HRM models that are more suited to an industrial economy, which assumes a single employer and where work is carried out within a set of clearly defined boundaries. We draw on a decade of empirical research in cross‐boundary contexts to identify: (1) three types of networks (interactive, interwoven, and integrated) that vary according to their boundary properties, the focus of the work activity, and the prominent identification; (2) the particular structural, relational, and knowledge‐based tensions (Phelps, Heidl, & Wadhwa, 2012) that are inherent in each networked context; and (3) three HRM models (buffering, borrowing, and balancing) that are appropriate to sustain networked working in these contexts. The main contribution of the article is the identification of HRM models in networked contexts. © 2014 Wiley Periodicals, Inc.
Acceptance and Commitment Therapy Versus Cognitive Behavioral Therapy in the Treatment of Substance Use Disorder With Incarcerated Women
Authors: Lanza Patricia Villagrá , García Paula Fernández , Lamelas Filomena Rodríguez , González‐Menéndez Ana 
Published: January 2014

ObjectivesThis randomized controlled study compared acceptance and commitment therapy (ACT), cognitive‐behavioral therapy (CBT), and a control group.MethodThe participants were 50 incarcerated women diagnosed with current substance use disorder. Two psychologists carried out pre‐ and posttreatment assessment and a 6‐month follow‐up assessment using the following instruments: Anxiety Sensitivity Index, Addiction Severity Index‐6, Mini International Neuropsychiatric Interview, and Acceptance and Action Questionnaire.ResultsThe study shows that the women who received treatment benefited differentially from the interventions. At posttreatment, CBT was more effective than ACT in reducing anxiety sensitivity; however, at follow‐up, ACT was more effective than CBT in reducing drug use (43.8 vs. 26.7%, respectively) and improving mental health (26.4% vs. 19.4%, respectively).ConclusionACT may be an alternative to CBT for treatment of drug abuse and associated mental disorders. In fact, at long‐term, ACT may be more appropriate than CBT for incarcerated women who present serious problems.