bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Basic Concepts of the Crystallization from Aqueous Solutions: The Example of Aluminum Oxy(hydroxi)des and Aluminosilicates
Authors: Jolivet Jean‐Pierre , Chaneac Corinne , Chiche David , Cassaignon Sophie , Durupthy Olivier , Hernandez Julien 
Published: June 2012

AbstractReview: 55 refs.
Polar body emission
Authors: Liu X. Johné 
Published: June 2012

AbstractGeneration of a haploid female germ cell, the egg, consists of two rounds of asymmetric cell division (meiosis I and meiosis II), yielding two diminutive and nonviable polar bodies and a large haploid egg. Animal eggs are also unique in the lack of centrioles and therefore form meiotic spindles without the pre‐existence of the two dominant microtubule organizing centers (centrosomes) found in mitosis. Meiotic spindle assembly is further complicated by the unique requirement of sister chromatid mono‐oriented in meiosis I. Nonetheless, the eggs appear to adopt many of the same proteins and mechanisms described in mitosis, with necessary modifications to accommodate their special needs. Unraveling these special modifications will not only help understanding animal reproduction, but should also enhance our understanding of cell division in general. © 2012 Wiley Periodicals, Inc
Photoactivated Nitrene Chemistry to Prepare Gold Nanoparticle Hybrids with Carbonaceous Materials
Authors: Snell Kristen E. , Ismaili Hossein , Workentin Mark S. 
Published: June 2012

AbstractPhotolysis of organic solvent soluble aryl azide‐modified gold nanoparticles (N3‐AuNPs) with a core size of 4.6±1.6 nm results in the generation of interfacial reactive nitrene intermediates. The high reactivity of the nitrenes is utilized to tether the AuNP to the native surface of carbon nanotubes, and reduce graphene oxide and micro‐diamond powder, likely via addition to π‐conjugated carbon skeleton or insertion into the functionalities at the surface, to yield the desired hybrid material without the need for pretreatment of the surface. The AuNP‐covalent hybrid materials are robust in that they survive vigorous washing and sonication. In the absence of photolysis no attachment occurs with the same N3‐AuNP. The nanohybrid AuNP‐nanohybrid materials are characterized using a combination of TEM, powder XRD, XPS and UV/Vis and IR spectroscopies. All of the characterization studies confirm the uniform incorporation of the AuNP on the irradiated substrates.
A Socio‐interpersonal Perspective on PTSD: The Case for Environments and Interpersonal Processes
Authors: Maercker Andreas , Horn Andrea B. 
Published: June 2012

Post‐traumatic stress disorder (PTSD) is a common reaction to traumatic experiences. We propose a socio‐interpersonal model of PTSD that complements existing models of post‐traumatic memory processes or neurobiological changes. The model adds an interpersonal perspective to explain responses to traumatic stress. The framework draws from lifespan psychology, cultural psychology and research into close relationships and groups. Additionally, clinical knowledge about PTSD is incorporated. This involves knowledge about shame, guilt, estrangement feelings and protective factors, such as social support and forgiveness. Three levels are proposed at which relevant interpersonal processes can be situated and should be adequately researched. First, the individual level comprises social affective states, such as shame, guilt, anger and feelings of revenge. Second, at the close relationship level, social support, negative exchange (ostracism and blaming the victim), disclosure and empathy are proposed as dyadic processes relevant to PTSD research and treatment. Third, the distant social level represents culture and society, in which the collectivistic nature of trauma, perceived injustice, and social acknowledgement are concepts that predict the response trajectories to traumatic stress. Research by the current authors and others is cited in an effort to promote future investigation based on the current model. Methodological implications, such as multi‐level data analyses, and clinical implications, such as the need for couple, community or larger‐level societal interventions, are both outlined. Copyright © 2012 John Wiley & Sons, Ltd.Key Practitioner MessageThe socio‐interpersonal model proposes an interpersonal view of the processes that occur in the aftermath of a traumatic experience.At the individual level, the model integrates the social affective phenomena that clinical research identifies in PTSD patients, including shame, guilt, anger, revenge and the urges or reluctance to disclose.At the level of close relationships, there is an emphasis on the role of the individuals' partner, family or social support in the development or maintenance of PTSD and its recovery.At the distant social level, societal and cultural factors, e.g., individualistic versus collectivistic or other human value orientations, are acknowledged as contributing to the severity and course of PTSD.Increasing attention should be given to new approaches of PTSD treatment that refer to an interpersonal view of PTSD, e.g., communication training, PTSD‐specific couples' therapy or community programs.
Acid‐Catalyzed Conversion of Xylose in Methanol‐Rich Medium as Part of Biorefinery
Authors: Hu Xun , Lievens Caroline , Li Chun‐Zhu 
Published: June 2012

AbstractAcid treatments of xylose have been performed in a methanol/water mixture to investigate the reaction pathways of xylose during bio‐oil esterification. Xylose was mainly converted into methyl xylosides with negligible humins formed below 130 °C. However, humins formation became significant with the dehydration of xylose to furfural and 2‐(dimethoxymethyl)furan (DOF) at elevated temperatures. The conversion of xylose to methyl xylosides protected the C1 hydroxyl group of xylose, which stabilized xylose and suppressed the formation of sugar oligomers and polymerization reactions. In comparison, the conversion of furfural to DOF protected the carbonyl group of furfural. However, the protection did not remarkably suppress the polymerization of furfural at high temperatures because of the shift of the reaction equilibrium from DOF to furfural with a prolonged residence time. In addition, the acid treatment of furfural produced methyl levulinate in methanol and levulinic acid in water, which was catalyzed by formic acid.
Tuning the Acid/Metal Balance of Carbon Nanofiber‐Supported Nickel Catalysts for Hydrolytic Hydrogenation of Cellulose
Authors: Van de Vyver Stijn , Geboers Jan , Schutyser Wouter , Dusselier Michiel , Eloy Pierre , Dornez Emmie , Seo Jin Won , Courtin Christophe M. , Gaigneaux Eric M. , Jacobs Pierre A. , Sels Bert F. 
Published: June 2012

AbstractCarbon nanofibers (CNFs) are a class of graphitic support materials with considerable potential for catalytic conversion of biomass. Earlier, we demonstrated the hydrolytic hydrogenation of cellulose over reshaped nickel particles attached at the tip of CNFs. The aim of this follow‐up study was to find a relationship between the acid/metal balance of the Ni/CNFs and their performance in the catalytic conversion of cellulose. After oxidation and incipient wetness impregnation with Ni, the Ni/CNFs were characterized by various analytical methods. To prepare a selective Ni/CNF catalyst, the influences of the nature of oxidation agent, Ni activation, and Ni loading were investigated. Under the applied reaction conditions, the best result, that is, 76 % yield in hexitols with 69 % sorbitol selectivity at 93 % conversion of cellulose, was obtained on a 7.5 wt % Ni/CNF catalyst prepared by chemical vapor deposition of CH4 on a Ni/γ‐Al2O3 catalyst, followed by oxidation in HNO3 (twice for 1 h at 383 K), incipient wetness impregnation, and reduction at 773 K under H2. This preparation method leads to a properly balanced Ni/CNF catalyst in terms of Ni dispersion and hydrogenation capacity on the one hand, and the number of acidic surface‐oxygen groups responsible for the acid‐catalyzed hydrolysis on the other.
Generation of mice with a conditional null fraser syndrome 1 (Fras1) allele
Authors: Pitera Jolanta E. , Turmaine Mark , Woolf Adrian S. , Scambler Peter J. 
Published: June 2012

AbstractSummary: Fraser syndrome (FS) is an autosomal recessive disease characterized by skin lesions and kidney and upper airway malformations. Fraser syndrome 1 (FRAS1) is an extracellular matrix protein, and FRAS1 homozygous mutations occur in some FS individuals. FRAS1is expressed at the epithelial‐mesenchymal interface in embryonic skin and kidney. blebbed mice have a null Fras1 mutation and phenocopy human FS. Like humans with FS, they exhibit a high fetal and neonatal mortality, precluding studies of FRAS1 functions in later life. We generated conditional Fras1 null allele mice. Cre‐mediated generalized deletion of this allele generated embryonic skin blisters and renal agenesis characteristic of blebbed mice and human FS. Targeted deletion of Fras1 in kidney podocytes circumvented skin blistering, renal agenesis, and early death. FRAS1 expression was downregulated in maturing glomeruli which then became sclerotic. The data are consistent with the hypothesis that locally produced FRAS1 has roles in glomerular maturation and integrity. This conditional allele will facilitate study of possible role for FRAS1 in other tissues such as the skin. genesis 50:892–898, 2012. © 2012 Wiley Periodicals, Inc.
Optimization of the Performance of Dye‐Sensitized Solar Cells Based on Pt‐Like TiC Counter Electrodes
Authors: Wang Yudi , Wu Mingxing , Lin Xiao , Hagfeldt Anders , Ma Tingli 
Published: June 2012

AbstractTitanium carbide (TiC) has been used as a counter electrode (CE) catalyst in place of Pt for triiodide reduction in dye‐sensitized solar cells (DSCs). Its catalytic activity can be comparable to that of Pt. The effect of the thickness of the TiC layer on the performance of the DSCs was investigated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and Tafel polarization measurements. We found that as the film thickness increased, the fill factor and short‐circuit current density increased, which led to improved power‐conversion efficiency. When the TiC film was thicker than 20 μm, however, no significant continuous improvement in the catalytic activity was observed. A high power‐conversion efficiency of 6.46 % was obtained for the DSC by using a TiC CE at the optimized film thickness, a value similar to that obtained with a Pt CE.
Phosphane‐Pyridine Iron Complexes: Synthesis, Characterization and Application in Reductive Amination through the Hydrosilylation Reaction
Authors: Jaafar Hassen , Li Haoquan , Misal Castro Luis C. , Zheng Jianxia , Roisnel Thierry , Dorcet Vincent , Sortais Jean‐Baptiste , Darcel Christophe 
Published: June 2012

AbstractA series of 6 cyclopentadienyl phosphanyl‐pyridine piano‐stool iron complexes was prepared in good yields, characterized, and studied in the catalytic reductive amination of benzaldehyde derivatives through hydrosilylation reactions by using polymethylhydrosiloxane as the hydrosilane source and in dimethylcarbonate as the solvent at 40 °C. Single‐crystal X‐ray structural analyses were performed for all the complexes.
Fabrication of Hemoglobin/Ionic Liquid Modified Carbon Paste Electrode Based on the Electrodeposition of Gold Nanoparticles/CdS Quantum Dots and Its Electrochemical Application
Authors: Dong Sheying , Li Nan , Zhang Penghui , Li Yunsheng , Chen Zhen , Huang Tinglin 
Published: June 2012

AbstractA novel H2O2 amperometric biosensor based on the electrodeposition of gold nanoparticles (AuNPs) and CdS quantum dots (CdS QDs) onto a carbon paste electrode (CPE) and immobilizing hemoglobin (Hb) with ionic liquid (IL), is presented in this article. The modification process of the electrode was monitored by scanning electron microscopy (SEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Due to synergistic effects of AuNPs, CdS QDs and IL, the biosensor exhibited high stability and good bioelectrocatalytic ability to H2O2 with a linear concentration range from 10 to 750 µM and a detection limit of 4.35 µM (S/N=3).
Poly(Neutral Red)/Cholesterol Oxidase Modified Carbon Film Electrode for Cholesterol Biosensing
Authors: Torres A. Carolina , Ghica M. Emilia , Brett Christopher M. A. 
Published: June 2012

AbstractNew amperometric cholesterol oxidase (ChOx) based enzyme biosensors for cholesterol have been developed. The enzyme was immobilised with and without glutaraldehyde cross‐linking on top of carbon film electrodes modified with redox mediators. Mediators tested were: poly(neutral red) (PNR), Prussian blue and cobalt hexacyanoferrates. Amperometric detection of cholesterol showed that PNR/ChOx modified electrodes exhibited the best characteristics; under optimised conditions cholesterol was determined at −0.4 V vs. SCE with a detection limit of 1.9 µM. The biosensors showed good reproducibility and stability and only a small influence from potential interferents in food. Analyses of cholesterol in egg yolk were successfully performed.
Effect of the Incorporation of Proteins on the Performance of Carbon Paste Electrodes Modified with Electrogenerated Magnetite Nanoparticles towards the Reduction of Hydrogen Peroxide
Authors: Comba Fausto N. , Gutierrez Fabiana , Herrasti Pilar , Rubianes María D. , Rivas Gustavo A. 
Published: June 2012

AbstractThis work reports the effect of the incorporation of different proteins within carbon paste electrodes (CPE) modified with electrochemically synthesized magnetite nanoparticles (20 nm) on the electrochemical response towards hydrogen peroxide. Scanning electron microscopy images reveal that the proteins produce a more efficient dispersion of the nanoparticles within the composite. When CPE is modified with 5.0 % w/w magnetite and 5.0 % w/w albumin the sensitivity for hydrogen peroxide at −0.100 V is enhanced 40 times and the charge transfer resistance significantly decreases. The increase in sensitivity and the decrease in Rct was dependent on the nature of the protein.
Does Enhanced Cognitive Behaviour Therapy for Eating Disorders Improve Quality of Life?
Authors: Watson Hunna J. , Allen Karina , Fursland Anthea , Byrne Susan M. , Nathan Paula R. 
Published: June 2012

AbstractQuality of life (QOL) is the degree of enjoyment and satisfaction experienced in life, and embraces emotional well‐being, physical health, economic and living circumstances, and work satisfaction. QOL recovery with eating disorder treatment has received sparse attention, and until now, no study has investigated QOL recovery with enhanced cognitive behaviour therapy (CBT‐E). Patients (n = 196) admitted to a specialist eating disorders outpatient programme and receiving CBT‐E completed measures of QOL, eating disorder psychopathology, depression, anxiety and self‐esteem, before and after treatment. QOL at intake was compared with community norms, and QOL below the norm was predicted from sociodemographic and clinical correlates with logistic regression. Baseline QOL below the norm was associated with depression and anxiety Axis I comorbidity, and severity of depressive symptoms. Predictors of post‐treatment QOL were baseline QOL and level of depressive symptoms and self‐esteem at post‐treatment. CBT‐E was associated with gains in QOL over the course of treatment, in addition to eating disorder symptom relief. Copyright © 2012 John Wiley & Sons, Ltd and Eating Disorders Association.
The influence of local topography for wind direction on Mars: two examples of dune fields in crater basins
Authors: Cardinale Marco , Komatsu Goro , Silvestro Simone , Tirsch Daniela 
Published: June 2012

ABSTRACTIn this work, we perform an analysis of large dark dunes within Moreux Crater and Herschel Crater on Mars using High Resolution Imaging Science Experiment (HiRISE) and Context Camera (CTX) data sets. These data allow us to conduct a detailed analysis of dune morphology and slip faces, concluding that the studied dune fields are influenced by topographically‐controlled complex wind directions. Our morphological analysis reveals that inside Moreux Crater in particular, the topographic setting dominates the wind flow direction, leading to the development of a sand transport pathway encircling the central peak of the crater. The dune fields in Herschel Crater are also affected by winds controlled by variable topography as suggested by the presence of complex dunes and dune fields. Our analysis indicate that the studied dune systems is not the result of paleo‐wind regimes. Furthermore, we perform thermal inertia measurements using thermal emission spectrometer (TES) data, which indicate that the studied dune fields consist of medium sand 250–500 µm in diameter. Copyright © 2012 John Wiley & Sons, Ltd.
Predicted mixture toxic pressure relates to observed fraction of benthic macrofauna species impacted by contaminant mixtures
Authors: Posthuma Leo , de Zwart Dick 
Published: June 2012

Abstract
Species sensitivity distributions (SSDs) quantify fractions of species potentially affected in contaminated environmental compartments using test species sensitivity data. The present study quantitatively describes associations between predicted and observed ecological impacts of contaminant mixtures, based on monitoring data of benthic macroinvertebrates. Local mixture toxic pressures (multisubstance potentially affected fraction of species [msPAF]) were quantified based on measured concentrations of 45 compounds (eight metals, 16 chlorinated organics, mineral oil, 16 polycyclic aromatic hydrocarbons, four polychlorinated biphenyls), using acute as well as chronic 50%-effective concentration-based SSD-modeling combined with bioavailability and mixture modeling. Acute and chronic toxic pressures were closely related. Generalized linear models (GLMs) were derived to describe taxon abundances as functions of environmental variables (including acute toxic pressure). Acute toxic pressure ranged from 0 to 42% and was related to abundance for 74% of the taxa. Habitat-abundance curves were generated using the GLMs and Monte Carlo simulation. Predicted abundances for the taxa were associated with acute mixture toxic pressure in various ways: negative, positive, and optimum abundance changes occurred. Acute toxic pressure (msPAF) was associated almost 1:1 with the observed fraction of taxa exhibiting an abundance reduction of 50% or more. The findings imply that an increase of mixture toxic pressure associates to increased ecological impacts in the field. This finding is important, given the societal relevance of SSD model outputs in environmental policies. Environ. Toxicol. Chem. 2012; 31: 2175–2188. © 2012 SETAC
TFA from HFO-1234yf: Accumulation and aquatic risk in terminal water bodies
Authors: Russell Mark H. , Hoogeweg Gerco , Webster Eva M. , Ellis David A. , Waterland Robert L. , Hoke Robert A. 
Published: June 2012

Abstract
A next-generation mobile automobile air-conditioning (MAC) refrigerant, HFO-1234yf (CF3CF = CH2), is being developed with improved environmental characteristics. In the atmosphere, it ultimately forms trifluoroacetic acid (TFA(A); CF3COOH), which is subsequently scavenged by precipitation and deposited on land and water as trifluoroacetate (TFA; CF3COO-). Trifluoroacetate is environmentally stable and has the potential to accumulate in terminal water bodies, that is, aquatic systems receiving inflow but with little or no outflow and with high rates of evaporation. Previous studies have estimated the emission rates of HFO-1234yf and have modeled the deposition concentrations and rates of TFA across North America. The present study uses multimedia modeling and geographic information system (GIS)-based modeling to assess the potential concentrations of TFA in terminal water bodies over extended periods. After 10 years of emissions, predicted concentrations of TFA in terminal water bodies across North America are estimated to range between current background levels (i.e., 0.01–0.22 µg/L) and 1 to 6 µg/L. After 50 years of continuous emissions, aquatic concentrations of 1 to 15 µg/L are predicted, with extreme concentrations of up to 50 to 200 µg/L in settings such as the Sonoran Desert along the California/Arizona (USA) border. Based on the relative insensitivity of aquatic organisms to TFA, predicted concentrations of TFA in terminal water bodies are not expected to impair aquatic systems, even considering potential emissions over extended periods. Environ. Toxicol. Chem. 2012; 31: 1957–1965. © 2012 SETAC
Integrated predictive call admission control and resource reservation for wireless networks: an adaptive filtering approach
Authors: Ukil Arijit , Misra Iti Saha 
Published: June 2012

ABSTRACTAllocation of network resources in determining whether the connection can be established or not while maintaining stringent quality of service under desired traffic condition is the principal objective of a call admission control (CAC) algorithm. Radio resources when applied to real‐time applications may lead to over‐provisioning in wireless networks. Although CAC and resource reservation are treated independently in the literature, an attempt has been undertaken in this paper to formulate an integrated algorithm capable of providing accurate predictive CAC and resource reservation techniques with optimal resource utilization. The algorithm has been developed using the concept of adaptive filtering. The principal focus has been directed to introduce normalized least mean square adaptive filtering to estimate the source traffic characteristics. With extensive simulation results, we show the effectiveness of the proposed scheme and analyse the significance of different parameters involved in the scheme to optimize the overall radio resource management.Copyright © 2012 John Wiley & Sons, Ltd.
LITAF (SIMPLE) regulates Wallerian degeneration after injury but is not essential for peripheral nerve development and maintenance: Implications for Charcot‐Marie‐Tooth disease
Authors: Somandin Christian , Gerber Daniel , Pereira Jorge A. , Horn Michael , Suter Ueli 
Published: June 2012

AbstractMissense mutations affecting the LITAF gene (also known as SIMPLE) lead to the dominantly inherited peripheral neuropathy Charcot‐Marie‐Tooth disease type 1C (CMT1C). In this study, we sought to determine the requirement of Litaf function in peripheral nerves, the only known affected tissue in CMT1C. We reasoned that this knowledge is a prerequisite for a thorough understanding of the underlying disease mechanism with regard to potential contributions by Litaf loss of function. In addition, we anticipated to obtain valuable information about the basic function of the Litaf protein in peripheral nerves. To address these issues, we generated mice without Litaf expression using gene disruption in embryonic stem cells and analyzed Litaf‐deficient peripheral nerves during development, in maintenance, and after injury. Our results show that Litaf function is not absolutely required for peripheral nerve development and maintenance. In injured nerves, however, we found that lack of Litaf led to increased numbers of macrophages during Wallerian degeneration, accelerated myelin destruction, and the emergence of more axonal sprouts. Consistent with these data, the migration of Litaf‐deficient macrophages was increased upon chemokine stimulation. We conclude that loss of Litaf function is unlikely to be a major contributor to CMT1C, but modulating effects of macrophages need to be considered in the etiology of the disease. © 2012Wiley Periodicals, Inc.