bluuebunny/crossref_metadata_2025_split huggingface dataset:
Growth Inhibition of Microcystis aeruginosa by Copper‐based MOFs: Performance and Physiological Effect on Algal Cells
Authors: Fan Gongduan , Zhou Jinjin , Zheng Xiaomei , Chen Wei 
Published: October 2018

The problem of cyanobacteria bloom occurring in the eutrophic water increases more serious and urgent needs to be solved. Based on the advantages of Metal–organic frameworks (MOFs), some reported studies have evaluated the inhibition effect of MOFs on algae. However, the influence of that on the physiological characteristics of algal cells has not been investigated thoroughly. In this study, Cu‐MOF‐74 was successfully synthesized by a facile hydrothermal method and was characterized by XRD and SEM. The growth inhibition of Microcystis aeruginosa were conducted to explore the effects of Cu‐MOF‐74 based on the physiology of algal cells to reveal algae inhibition mechanism. The results showed that the synthesized Cu‐MOF‐74 was a large needle‐shaped crystal, and the size of the grain was 3–4.5 μm. 1 mg/L of Cu‐MOF‐74 has relatively excellent inhibitory effect on algae, which can achieve the removal efficiency of 75.5% within 120 hr. Besides, the content of chlorophyll a decreased by about 56%, the diminishing of chlorophyll a and phycobiliprotein concentration resulted in photosystem damage. In this process, ROS accumulated continually in algal cells with the slow release of metal ions Cu2+ of Cu‐MOF‐74 which acts as a ‘reservoir’, then causing the oxidation loss, the reduction of SOD activity and the increase of CAT activity. The hydroxyl radical generated by Cu‐MOF‐74 caused lipid peroxidation. Thereby the situation above eventually resulted in the death of Microcystis aeruginosa and the concentration of extracellular organic matter increased. All the above, we think Cu‐MOF‐74 can inhibit the growth of algal cells through effecting on physiology and can be applied to control the cyanobacteria blooms.
Fabrication of mixed phase calcium ferrite and zirconia nanocomposite for abatement of methyl orange dye from aqua matrix: Optimization of process parameters
Authors: Bhowmik Mahashweta , Debnath Animesh , Saha Biswajit 
Published: October 2018

In this study, mixed phase of CaFe2O4 and ZrO2 magnetic nanocomposite (CaF‐ZO‐MNC) was fabricated through facile co‐precipitation method and was explored for abatement of methyl orange (MO) dye from aqua matrix. X‐ray diffraction (XRD) pattern of the synthesized CaF‐ZO‐MNC depicted significant diffraction peaks of ZrO2 and CaFe2O4 nanoparticles ensured the crystalline nature of the material. The coexistence of ZrO2 and CaFe2O4 nanoparticles in the composite increased the BET surface area (95.32m2/g) and improves its physicochemical properties as an adsorbent. Enhanced adsorption capacity towards MO dye was found to be 370.37 mg/g from Langmuir model, which is higher than standalone nanoscale Fe, Ca, and Zr metal oxide nanoparticles. The equilibrium adsorption data were found to follow Langmuir isotherm and the adsorption process followed second order kinetic model strictly. Response surface methodology (RSM) was utilized for optimizing the experimental conditions for maximizing the MO dye removal (%) with desirability function approach. Four factors five levels central composite design was implemented for RSM study and the simultaneous interaction of process variables on dye removal efficiency was studied by 3D response surface plots. Maximum MO dye removal of 98.92% was determined with MO dye concentration of 22 mg/L, adsorbent dose of 0.54 g/L, contact time of 25 min at recation temperature of 30 °C.
Development of highly conductive graphite‐/graphene‐filled polybenzoxazine composites for bipolar plates in fuel cells
Authors: Phuangngamphan M. , Okhawilai M. , Hiziroglu S. , Rimdusit S. 
Published: October 2018

ABSTRACTSuperior conductive fillers reinforced polymer composites are ideal alternatives to graphitic and metallic materials in proton exchange membrane fuel cells (PEMFCs) for high thermal and electrical conductive bipolar plates. Polymer composites are known to be adversely influenced from high contact resistance thus to minimize such resistance, highly graphite‐/graphene‐filled polybenzoxazine (PBA) composites are developed in this work. A very low melt viscosity of benzoxazine resin with graphite loading as high as 83 wt % is used for the samples. With an addition of graphene platelet, thermal and electrical conductivities of the specimens having 75.5 wt % of graphite in a combination of 7.5 wt % of graphene are significantly enhanced to 14.5 W mK−1 and 323 S cm−1, respectively. Properties of highly graphite‐/graphene‐filled PBA composites exhibit most values exceed those requirements by the U.S. Department of Energy for PEMFCs applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47183.
Controlled Formation of a Main Chain Supramolecular Polymer Based on Metal–Ligand Interactions and a Thiol‐Ene Click Reaction
Authors: Chen Feiyi , Tian Yu‐Kui , Chen Yulan 
Published: October 2018

AbstractSupramolecular polymers with multiple functionalities and hierarchical structures have received considerable attention and become a hot research topic over the past years. Herein, a main‐chain supramolecular polymer has been successfully fabricated by using metal–ligand interactions and a thiol‐ene click reaction. 1H NMR, UV/Vis, DOSY, and viscosity measurements were carried out to investigate the molecular recognition and the process of supramolecular polymerization. From the study, the orthogonality between thiol‐ene click reactions and the terpyridine–metal ions complexation behavior was testified, and supramolecular polymeric assemblies could be constructed by a one pot method. In the meantime, due to the incorporation of metal‐ligand interactions, the supramolecular polymer shows stimuli‐responsive properties toward chemical stimuli. Hence, this work could provide a methodology for developing supramolecular polymers as smart materials.
Dinuclear Lanthanide Complexes Based on a Schiff‐base Ligand: Free Lattice Solvent Inducing the Single Molecule Magnet Behavior of Dy2 Compound
Authors: Ge Yu , Qin Yaru , Cui Yanfeng , Pan Yangdan , Huang Yuan , Li Yahong , Liu Wei , Zhang Yi‐Quan 
Published: October 2018

AbstractSyntheses, crystal structures and magnetic properties are described for a series of seven‐coordinate dinuclear lanthanide complexes of compositions Dy2L2 (1) (H3L=2‐{[bis(2‐hydroxy‐3‐ethoxybenzyl)(aminoethyl)amino]methyl}phenol) and Ln2L2⋅MeCN (Ln=Dy (2), Sm (3), Eu (4), Gd (5), Tb (6), Ho (7)). The reaction of Dy(NO3)3⋅6 H2O with one equivalent of H3L at 70 °C in DMF/EtOH under autogenous pressure gave compound 1. Complexes 2–7 were prepared by means of the same method as that used for 1, except DMF was replaced by MeCN as the reaction solvent and Dy(NO3)3⋅6 H2O was changed to the corresponding lanthanide salts. Complexes 1–7 possess the similar Ln2 cores bridged by μ2‐phenoxyl oxygen atoms. The slight difference between 1 and 2–7 arises from the existence of free MeCN molecule in 2–7. The purposeful introduction of solvent MeCN molecule changes the crystal system from triclinic for 1 to monoclinic for 2 and alters the Dy—O–Dy angles and Dy⋅⋅⋅Dy distances, consequentially resulting into dramatic influences on the magnetic properties of 1 and 2. Complex 1 shows no SMM character, while compound 2 with free MeCN molecule exhibits a field‐induced slow magnetization relaxation behavior. Complete active space self‐consistent field (CASSCF) calculations were performed on two Dy2 compounds to rationalize the observed difference in the magnetic behavior. Theoretical calculations reveal that the energy gap between the lowest two Kramers doublets of individual DyIII fragment for 2 is higher than those of 1 (1_a and 1_b). This conlusion is consistant with the experimental result that complex 2 exhibits better magnetic properties. This work proposes an ingenious strategy for inducing the SMM behavior in the Dy2 compounds.
Association between schizophrenia and autism spectrum disorder: A systematic review and meta‐analysis
Authors: Zheng Zhen , Zheng Peng , Zou Xiaobing 
Published: October 2018

Schizophrenia and autism spectrum disorder (ASD) are significant public health problems. Scientists have recently explored the association between schizophrenia and ASD, but the findings are inconsistent. Thus, we conducted a systematic review and meta‐analysis of epidemiological studies to examine the association between schizophrenia and ASD. PubMed, Embase, and the Cochrane Library were used for literature searches to identify eligible studies published in English before October 2, 2017. Relevant studies estimating the association between schizophrenia and ASD were included. The meta‐analysis of the prevalence of schizophrenia in individuals with ASD encompassed 1,950,113 participants and 14,945 individuals with ASD. A random‐effects model was chosen to synthesize the effect sizes of individual studies. The prevalence of schizophrenia was significantly higher in individuals with ASD than in controls (odds ratio = 3.55, 95% confidence interval: 2.08–6.05, P < .001). Both sensitivity analysis and publication bias testing revealed that the findings were robust. The systematic review of the prevalence of ASD in individuals with schizophrenia encompassed 930 participants. The prevalence of ASD in individuals with schizophrenia ranged from 3.4 to 52%. The systematic review and meta‐analysis showed a significant association between schizophrenia and ASD. Autism Research 2018, 11: 1110–1119. © 2018 International Society for Autism Research, Wiley Periodicals, Inc.Lay SummaryThis systematic review and meta‐analysis explored the association between schizophrenia and ASD. We found that the prevalence of schizophrenia was significantly higher in individuals with ASD than in controls and the prevalence of ASD in individuals with schizophrenia ranged from 3.4 to 52%. A comprehensive estimation of schizophrenia and ASD has important implications for the diagnosis, treatment, prognosis, and development of a fundamental understanding of these disorders.
Bemessung und experimentelle Untersuchungen von eingeschlitzten Verbindungen mit GFK‐Platten und Stabdübeln für den Ingenieurholzbau
Authors: Hartig Jens , Namari Siavash , Wehsener Jörg , Haller Peer 
Published: October 2018

AbstractHolz ist für den Einsatz in Tragwerken unter korrosiven Bedingungen aufgrund seiner Korrosionbeständigkeit prädestiniert. Häufig stellen dabei jedoch Verbindungen aus Stahl eine Schwachstelle hinsichtlich der Dauerhaftigkeit dar. In diesem Beitrag wird eine Möglichkeit der Ausbildung von Verbindungen aus nichtmetallischen Werkstoffen in Form von glasfaserverstärkten Kunststoffen (GFK) vorgestellt, die im Pultrusionsverfahren hergestellt werden und kommerziell verfügbar sind. Die GFK‐Platten werden dabei in Schlitze im Holzquerschnitt eingebracht und mit Stabdübeln verbunden. Es wird ein Bemessungsmodell auf Grundlage des Eurocodes 5 und der allgemeinen bauaufsichtlichen Zulassung der GFK‐Platten entwickelt und anhand eines Bemessungsbeispiels verdeutlicht. Die Vorhersagen des Bemessungsmodells werden durch Traglastversuche an Trägern mit bauteilnahen Abmessungen überprüft und bestätigt. Es zeigt sich, dass mit den entwickelten Verbindungen ähnliche Trageigenschaften wie mit herkömmlichen eingeschlitzten Stahlverbindungen erreicht werden können. Ein Grund dafür ist das fehlende Lochspiel, das durch ein gleichzeitiges Bohren von Holz‐ und Plattenquerschnitt erreicht wird. Dies erzeugt im Vergleich zu Stahlverbindungen eine gleichmäßigere Belastung der Dübel und geringere Verformungen.
Recent Progress on Transition Metal Oxides as Bifunctional Catalysts for Lithium‐Air and Zinc‐Air Batteries
Authors: Pan Jing , Tian Xin Long , Zaman Shahid , Dong Zehua , Liu Hongfang , Park Ho Seok , Xia Bao Yu 
Published: October 2018

AbstractIn recent years, rechargeable Li‐air and Zn‐air batteries have attracted wide attention due to their high theoretical specific energy densities. However, the high cost and poor stability of noble metal catalysts for the oxygen redox reactions limit their practical large‐scale application. On contrast, low‐cost transition metal oxide (TMO)‐based composite materials exhibit considerable bifunctional activity for oxygen reduction and oxygen evolution, and excellent stability, which holds great potential over the precious metal‐based catalysts. This work briefly introduces the recent advances in TMO‐based composites as bifunctional oxygen electrocatalysts for Li‐air and Zn‐air batteries. After a brief introduction into the research field of air batteries, metal oxides (including Co‐ and Mn‐based oxides) and polymetallic oxides (mainly spinel and perovskite types) are reviewed. In consideration of the poor electronic conductivity of metal oxide catalysts, composites including additional conductive materials are also introduced. Finally, challenges and perspectives of bifunctional TMOs are emphasized to stimulate innovations for the future development of practical Li‐air and Zn‐air batteries.
Große Stabdurchmesser und hohe Bewehrungsgrade
Authors: Oettel Vincent , Empelmann Martin 
Published: October 2018

AbstractDurch die Verwendung von großen Stabdurchmessern und hohen Bewehrungsgraden können Stützen mit kleinen Querschnitten hergestellt werden. Diese Stützen besitzen beispielsweise bei der Errichtung von Hochhäusern ein großes ausführungstechnisches und wirtschaftliches Potenzial, da u. a. die Installation der technischen Gebäudeausrüstung vereinfacht und die vermietbare Nutzfläche maximiert werden kann. Der Einsatz solcher Stützen wird allerdings aufgrund fehlender Versuchserfahrungen und durch die vorhandenen normativen Regelungen begrenzt. Um die Herstellbarkeit, Tragfähigkeit und Robustheit solcher hochbewehrten Stützen zu untersuchen, wurden am iBMB, Fachgebiet Massivbau der TU Braunschweig experimentelle und numerische Untersuchungen an normalfesten Stahlbetonstützen mit großen Stabdurchmessern und hohen Bewehrungsgraden durchgeführt. Der vorliegende Beitrag beschreibt die durchgeführten Versuche und stellt die experimentellen und numerischen Ergebnisse vor.
A metabolic control analysis approach to introduce the study of systems in biochemistry: the glycolytic pathway in the red blood cell
Authors: Angelani Carla R. , Carabias Pablo , Cruz Karen M. , Delfino José M. , de Sautu Marilina , Espelt María V. , Ferreira‐Gomes Mariela S. , Gómez Gabriela E. , Mangialavori Irene C. , Manzi Malena , Pignataro María F. , Saffioti Nicolás A. , Salvatierra Fréchou Damiana M. , Santos Javier , Schwarzbaum Pablo J. 
Published: October 2018

AbstractMetabolic control analysis (MCA) is a promising approach in biochemistry aimed at understanding processes in a quantitative fashion. Here the contribution of enzymes and transporters to the control of a given pathway flux and metabolite concentrations is determined and expressed quantitatively by means of numerical coefficients. Metabolic flux can be influenced by a wide variety of modulators acting on one or more metabolic steps along the pathway. We describe a laboratory exercise to study metabolic regulation of human erythrocytes (RBCs). Within the framework of MCA, students use these cells to determine the sensitivity of the glycolytic flux to two inhibitors (iodoacetic acid: IA, and iodoacetamide: IAA) known to act on the enzyme glyceraldehyde‐3‐phosphate‐dehydrogenase. Glycolytic flux was estimated by determining the concentration of extracellular lactate, the end product of RBC glycolysis. A low‐cost colorimetric assay was implemented, that takes advantage of the straightforward quantification of the absorbance signal from the photographic image of the multi‐well plate taken with a standard digital camera. Students estimate flux response coefficients for each inhibitor by fitting an empirical function to the experimental data, followed by analytical derivation of this function. IA and IAA exhibit qualitatively different patterns, which are thoroughly analyzed in terms of the physicochemical properties influencing their action on the target enzyme. IA causes highest glycolytic flux inhibition at lower concentration than IAA. This work illustrates the feasibility of using the MCA approach to study key variables of a simple metabolic system, in the context of an upper level biochemistry course. © 2018 International Union of Biochemistry and Molecular Biology, 46(5):502–515, 2018.
It takes time to tango: The relative importance of values versus traits in consumer brand relationships
Authors: Voorn Ronald J.J. , van der Veen Gerrita , van Rompay Thomas J.L. , Pruyn Ad T.H. 
Published: October 2018

AbstractBrand managers have several options in their quest to connect their brands with consumers. They may stress functional brand attributes and benefits, their brand's personality traits, or their brand's values (the human values attached to the brand). Which of these is most important to consumers is an open question, however. This article proposes that values may take on increased importance over time, as long‐term relationships (in general) require more than just getting the job done (functional aspect) or a sense of recognition (trait correspondence). What is required most of all is a correspondence between long‐term objectives and goals in life. Values are arguably the most relevant factor in longer relationships. An experiment was put together to determine if this is indeed the case. The results of our study suggest that values are indeed considered more important than traits in the case of longer relationships and that this is particularly true with decisions regarding prospective relationships and in the case of services.
The Coordination Chemistry of Copper Uptake and Storage for Methane Oxidation
Authors: Dennison Christopher 
Published: October 2018

AbstractMethanotrophs are remarkable bacteria that utilise large quantities of copper (Cu) to oxidize the potent greenhouse gas methane. To assist in providing the Cu they require for this process some methanotrophs can secrete the Cu‐sequestering modified peptide methanobactin. These small molecules bind CuI with very high affinity and crystal structures have given insight into why this is the case, and also how the metal ion may be released within the cell. A much greater proportion of methanotrophs, genomes of which have been sequenced, possess a member of a newly discovered bacterial family of copper storage proteins (the Csps). These are tetramers of four‐helix bundles whose cores are lined with Cys residues enabling the binding of large numbers of CuI ions. In methanotrophs, a Csp exported from the cytosol stores CuI for the active site of the ubiquitous enzyme that catalyses the oxidation of methane. The presence of cytosolic Csps, not only in methanotrophs but in a wide range of bacteria, challenges the dogma that these organisms have no requirement for Cu in this location. The properties of the Csps, with an emphasis on CuI binding and the structures of the sites formed, are the primary focus of this review.
One Step up the Ladder of Prebiotic Complexity: Formation of Nonrandom Linear Polypeptides from Binary Systems of Amino Acids on Silica
Authors: Sakhno Yuriy , Battistella Alice , Mezzetti Alberto , Jaber Maguy , Georgelin Thomas , Michot Laurent , Lambert Jean‐François 
Published: October 2018

AbstractEvidence for the formation of linear oligopeptides with nonrandom sequences from mixtures of amino acids coadsorbed on silica and submitted to a simple thermal activation is presented. The amino acid couples (glutamic acid+leucine) and (aspartic acid+valine) were deposited on a fumed silica and submitted to a single heating step at moderate temperature. The evolution of the systems was characterized by X‐ray diffraction, infrared spectroscopy, thermosgravimetric analysis, HPLC, and electrospray ionization mass spectrometry (ESI‐MS). Evidence for the formation of amide bonds was found in all systems studied. While the products of single amino acids activation on silica could be considered as evolutionary dead ends, (glutamic acid+leucine) and, at to some extent, (aspartic acid+valine) gave rise to the high yield formation of linear peptides up to the hexamers. Oligopeptides of such length have not been observed before in surface polymerization scenarios (unless the amino acids had been deposited by chemical vapor deposition, which is not realistic in a prebiotic environment). Furthermore, not all possible amino acid sequences were present in the activation products, which is indicative of polymerization selectivity. These results are promising for origins of life studies because they suggest the emergence of nonrandom biopolymers in a simple prebiotic scenario.
A Nano‐Sized [MnII18] Metallamacrocycle as a Building Unit to Construct Stable Metal–Organic Frameworks: Effective Gas Adsorption and Magnetic Properties
Authors: Zhou Lei , Zhou Baolei , Cao Shanshan , Cui Zheng , Qin Bowen , Li Wenliang , Zhang Xiaoying , Zhang Jingping 
Published: October 2018

AbstractA stable hex‐type metal‐organic framework (MOF, WMOF‐1) was constructed by nano‐sized [MnII18] metallamacrocycle secondary building unit, being the one with the highest nuclearity of manganese wheel‐like node in the microporous MOF. WMOF‐1 displays an effective gas adsorption and the antiferromagnetic behavior.
Comparison of adiposity indices in relation to prehypertension by age and gender: A community‐based survey in Henan, China
Authors: Wang Shuaibing , Peng Rui , Liang Shuying , Dong Kaiyan , Nie Wei , Yang Qian , Ma Nan , Zhang Jianying , Wang Kaijuan , Song Chunhua 
Published: October 2018

BackgroundTo compare the efficiency of bioelectrical indices (visceral fat index [VFI], percentage body fat [PBF]) and anthropometric indices (body mass index, waist circumference, waist‐to‐height ratio, a body shape index ) in the relation to prehypertension (120‐139/80‐89 mm Hg) among the Chinese population.MethodsUsing stratified multistage random sampling method, a general population‐based sample of 11 175 adults in Henan province were selected from 2013 to 2015. The individuals were divided into three categories by blood pressure levels: normotension (<120 and 80 mm Hg), stage 1 prehypertension (120‐129/80‐84 mm Hg) and stage 2 prehypertension (130‐139/85‐89 mm Hg).ResultsVFI and PBF tended to increase with age in men and women. However, for each age‐specific group, men tended to have higher VFI than women (all P < 0.01) and women tended to have greater PBF (all P < 0.0001). The odds ratios (OR) and area under the receiver operating characteristic curves for prehypertension associated with adiposity indices declined with age. VFI and PBF showed higher standardized adjusted ORs for prehypertension in young (~40 years) men (VFI: 2.02‐3.05; PBF: 1.82‐2.80) and young women (VFI: 1.90‐2.58; PBF:1.70‐2.29). Moreover, based on Youden's index, VFI and PBF exhibited the superiority for identifying prehypertension in men (0.20‐0.32) and women (0.31‐0.39), respectively.ConclusionIn summary, there was stronger association of VFI and PBF with prehypertension in men than in women, respectively, especially for young adults.