bluuebunny/crossref_metadata_2025_split huggingface dataset:
Characteristics of root fractures: Image on intraoral radiography, panoramic radiography, and cone‐beam computed tomography
Authors: Mizuhashi Fumi , Ogura Ichiro , Sugawara Yoshihiro , Oohashi Makoto , Sekiguchi Hirokazu , Saegusa Hisato 
Published: November 2019

AbstractBackground/AimThe aim of this study was to investigate the diagnostic method of root fracture, and to investigate the characteristics of root fractures.MethodsWe reviewed the CBCT images of 45 patients with root fracture. The frequency of diagnosable and impossible to diagnosis on root fracture tooth was counted at first for each radiography technique (intraoral radiography, panoramic radiography, and CBCT). Six characteristics that were considered to influence the occurrence of root fracture were investigated. Diagnostic propriety of root fracture was analyzed by cross‐tabulation. Statistical analysis of each characteristic of root fractures was performed by χ2 test.ResultsThe diagnostic propriety was different by radiography (P < .001). The occurrence of root fracture was different by pulpal vitality (P < .001). The frequency of root fracture was smaller at the tooth with a history of trauma (P < .001). The frequency of root fracture was larger at posterior teeth in comparison with anterior teeth (P = .025). State of root fracture was not different between vertical fracture and horizontal fracture (P = .053). The frequency of the occurrence of root fracture was smaller at caries tooth (P = .014). There was no statistically significant difference among cast core, composite resin core, and no core to the occurrence of root fracture (P = .828).ConclusionsIt was indicated that CBCT was useful for the diagnosis of root fracture. These results suggested that pulpal vitality and position of tooth influenced the occurrence of root fracture, but core construction was not influenced the occurrence of root fracture.
Feasibility of microwave‐induced combustion combined with inductively coupled plasma mass spectrometry for bromine and iodine determination in human nail
Authors: Novo Diogo La Rosa , Henn Alessandra Schneider , Flores Erico Marlon Moraes , Mesko Marcia Foster 
Published: November 2019

RationaleBromine and iodine have important physiological functions; however, in inadequate concentration, they can also cause several physiological problems. Their mobility assessment in human organisms through biological sampling may help clarify some doubts related to metabolic routes, which are still not well elucidated. In this context, a suitable analytical method for this purpose should be developed.MethodsAn analytical method for determining ultratrace levels of bromine and iodine in human nail samples was developed. Inductively coupled plasma mass spectrometry (ICP‐MS) using a conventional nebulization system was immediately chosen as the determination tool because of its powerful sensitivity and selectivity. Sample preparation methods including microwave‐induced combustion (MIC), microwave‐assisted extraction, and microwave‐assisted digestion were evaluated. The compatibility of the final solutions with ICP‐MS analysis was considered while the method was developed.ResultsMIC was chosen as the most suitable method for the sample preparation for determining the levels of bromine and iodine in human nail samples using ICP‐MS. Unlike other sample preparation methods, this one fully eliminated interferences related to the carbon content and memory effects. Sample masses up to 100 mg were efficiently digested, and the analytes were quantitatively absorbed using only 50 mmol L−1 NH4OH solution. Recoveries ranged from 93% to 102%, and the relative standard deviation was < 8%.ConclusionsThe proposed analytical method presents important characteristics for routine analysis. It allows ultratrace determination even when low sample masses are used because of the low blank values, reduced volume of reagents, and powerful detectability using ICP‐MS.
Which country characteristics support corporate social performance?
Authors: Alonso‐Martínez Daniel , De Marchi Valentina , Di Maria Eleonora 
Published: November 2019

AbstractAs a growing number of firms are investing in social and environmental sustainability, academics and practitioners are increasingly becoming concerned with studying the factors that drive firms to achieve higher corporate social performance (CSP). This paper aims to contribute to the literature investigating country‐level characteristics that influence the magnitude of firm CSP based on the framework of the antecedents of green innovation. By conducting a cross‐lagged analysis of more than 370 European B Corps—a growing form of social enterprise, this paper investigates how firm CSP is impacted by the regulatory framework, the technological capacity, and the demand pressures of the country in which it is embedded. Our findings support that the presence of technological and innovation capacities and of demanding, conscious customers are the two most important country‐level factors impacting CSP. Results bespoke of the importance to develop a policy approach that supports the development of technological skills at the firm's level and the awareness at the demand level, rather than emphasizing a stricter regulation.
Influence of RGD Peptide on Morphology and Biocompatibility of 3D Scaffolds Based on PLA/Hydroxyapatite
Authors: Gutiérrez Sánchez Mariana , Escobar Barrios Vladimir A. , Guillén Amaury Pozos , Escobar‐García Diana M. 
Published: November 2019

AbstractThe developments of three‐dimensional and bioactive supports are essential for bone tissue engineering. Therefore, this study reports the morphology and biological behavior of osteoblast cells grown on bioactive 3D scaffolds, obtained by electro‐spinning and based on poly(lactic acid), PLA, and Hydroxyapatite, HAp, composites (PLA/HAp), which were superficially treated with RGD. Likewise, the characterization of the obtained 3D scaffolds is presented and discussed. The results indicate that it is possible to obtain structures with porosities higher than 90% with interconnected channels, which favor cell adhesion and growth. Also, the biological performance evaluation of the scaffolds indicates that surface treatment with RGD was effective and has a synergistic effect along with HAp. The cell adhesion was also observed by SEM and the images show cells extended and adhered to the scaffold's fibers along with neighboring cells. Also, the HAp had an influence on cell proliferation, which showed the maximum values with 2.5 and 5.0% wt of HAp. Therefore, 3D PLA/HAp scaffolds, obtained by electrospinning, treated with RGD represent promising material for use in bone tissue engineering.
Benign Hydrothermal Synthesis of N‐doped TiO2 and TiO2‐CoS Nanostructures for Enhanced Visible‐Light Driven Photocatalytic Activity
Authors: Dey Kamol , Ganguli Sumon , Alam M. S. 
Published: November 2019

AbstractAn efficient utilization of broad‐spectrum solar light to harvest energy for photocatalysis in a sustainable manner remains a critical challenge in the area of environmental remediation for a long time. To address this challenge, N‐doped TiO2‐CoS nanocomposite was successfully synthesized for the first‐time via a benign hydrothermal treatment adopting combination of doping, dimensional diversity and coupling strategies. The phase composition, surface morphology, nitrogen adsorption‐desorption analysis and photocatalytic degradation of Rhodamine B dye (RhB) in aqueous solution under simulated sunlight were well characterized and analyzed. The powder X‐ray diffraction patterns demonstrated the crystalline anatase phase of TiO2 in all photocatalysts. Scanning electron microscopy confirmed the formation of N‐doped TiO2 nanofibrous (NTNF) structure without phase alteration of TiO2 and demonstrated the co‐existence of spherical CoS particles that were randomly wrapped within the NTNF fibrous structure making the NTNF‐CoS nanocomposite. Nitrogen adsorption‐desorption analysis revealed higher specific surface area and larger pore volume of NTNF with mesoporous structure compared to those of N‐doped TiO2 nanoparticle (NTNP). The NTNF‐CoS nanocomposite showed superior photocatalytic degradation of RhB under visible light, which was predominantly ascribed to the synergistic effects of enhanced surface area, narrower band gap and efficient separation of photogenerated charge carriers. Thus, the NTNF‐CoS nanocomposite could be considered as a potential candidate for the removal or degradation of micro‐pollutant from the wastewater.
A Luminescent Lanthanide‐Functionalized Metal‐Organic Framework as a Highly Selective and Sensitive Chemical Sensor for Dopamine
Authors: Ge Kaiming , He Xiaochun , Xu Zhijun , Chu Ruiqing 
Published: November 2019

AbstractDopamine (DA), which is a neurotransmitter of the nervous system and helps cell deliver pulse signals in the human body, is detected by a luminescent Tb‐functionalized metal‐organic framework (1a) sensor. The fluorescence quenching of as‐synthesized 1a in the presence of dopamine is owing to the energy competition effect of emission light as well as the interaction between 1a and DA. The sensor also displays outstanding performances, such as excellent sensitivity, fast response, good reusability, a wide linear detection range and lower detection limits. The sensor was also exhibited to be highly selective for DA in the presence of the main coexisting species. Significantly, the 1a sensor was able to detect DA in real human serum samples and DA portable test strips were also developed. Hence, the probe has promising potential to be a useful tool for point‐of‐care diagnosis of Parkinson's disease.
Electrocatalytic Activity and Stability of 3D Ordered N‐doped Hierarchically Porous Carbon Supported Pt Catalyst for Methanol Oxidation and Oxygen Reduction Reactions
Authors: Li Yunfeng , Wang Daorui , Xie Huanying , Zhang Chengwei 
Published: November 2019

AbstractHerein, nitrogen‐doped ordered hierarchical porous carbon (N‐OHPC) is fabricated via a templating method by applying silica colloidal crystal as template and polypyrrole (PPy) as carbon source. The as‐prepared N‐OHPC possesses ordered interconnected macropores, rich mesopores and large BET surface area (825.6 m2 g−1). Pt/N‐OHPC is then prepared by depositing Pt nanoparticles (19.3 wt%) on N‐OHPC as catalyst towards methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR). The Pt/N‐OHPC containing small and uniform Pt nanoparticles (∼1.7 nm) exhibits good electrocatalytic performance and better durability for MOR and ORR than the commercial Pt/C catalyst.
Highly Photoluminescent Carbon Dots Derived from Discarded Chewing Gum: toward Multiple Sensing of pH, Ferric Ion, and Adenosine Triphosphate
Authors: Hu Yaoping , Gao Zhijin 
Published: November 2019

AbstractIn this paper, we develop a sustainable strategy to reuse discarded chewing gum for low‐cost synthesis of carbon dots (CDs) via a H2O2‐assisted hydrothermal method. The as‐prepared CDs have a large photoluminescence (PL) quantum yield (QY) of up to 25.7%, much higher than the most values of waste‐derived CDs. Interestingly, the PL intensity of CDs increases linearly as pH rises from 1 to 6, demonstrating the possibility of CDs for accurate pH monitoring in acidic conditions. It is suggested that the pH‐responsive PL feature is induced by the protonation and deprotonation of the surface oxygenous groups of CDs. Through the fluorescence quenching and recovery processes, the CDs can serve as a selective and sensitive sensor for sequential detection of ferric ion (Fe3+) and adenosine triphosphate (ATP) with limit of detection (LOD) as low as 0.028 and 0.003 μM, respectively. A possible electron transfer process is proposed to elucidate the sensing mechanism. For real applications, the CD sensing platform is successfully employed to determinate pH in natural stream, Fe3+ in tap water, and ATP in erythrocyte sample.
Vanadium(V) and Molybdenum(VI) Complexes Containing ONO Tridentate Schiff Bases and Their Application as Catalysts for Oxidative Bromination of Phenols
Authors: Maurya Mannar R. , Jangra Nancy , Avecilla Fernando , Ribeiro Nádia , Correia Isabel 
Published: November 2019

AbstractCondensation of 2,4‐dihydroxyacetophenone with isonicotinoyl hydrazide and nicotinoyl hydrazide in an equimolar ratio in methanol results in the formation of two stable ONO donor ligands, H2dhap‐inh (I) and H2dhap‐nah (II), respectively. These ligands react with [VIVO(acac)2] (Hacac=acetylacetone) in 1:1 molar ratio to give the corresponding neutral dioxidovanadium(V) complexes, [VVO2(Hdhap‐inh)] (1) and [VVO2(Hdhap‐nah)] (2), after overnight aerial oxidation in the presence of K2CO3. In the absence of K2CO3, they result in (μ‐O){bisoxidovanadium(V)} complexes, [{VVO(dhap‐inh)}2(μ‐O)] (3) and [{VVO(dhap‐nah)}2(μ‐O)] (4). Treatment of neutral dioxidovanadium(V) complexes,1and2, with H2O2yields oxidoperoxidovanadium(V) complexes K[VVO(O2)(dhap‐inh)(H2O)] (5) and K[VVO(O2)(dhap‐nah)(H2O)] (6). The ligands also react with [MoVIO2(acac)2] in 1:1 molar ratio to form [MoVIO2(dhap‐inh)]n(7) and [MoVIO2(dhap‐nah)]n(8). The reaction of oxidoperoxidomolybdenum(VI) species, generated in situ by the reaction of MoO3with H2O2with ligandsIandII, gives the oxidoperoxidomolybdenum(VI) complexes, [MoVIO(O2)(dhap‐inh)(MeOH)] (9) and [MoVIO(O2)(dhap‐nah)(MeOH)] (10), respectively. All synthesized complexes are characterized by elemental analysis, thermogravimetric, electrochemical, spectroscopic (IR, UV–Vis,1H,13C and51V NMR) and single crystal X‐ray diffraction (for1,2and8). Complexes are explored as catalysts for the oxidative bromination of phenol, a model oxidative halogenation reaction, in the presence of HClO4and KBr, using 30% H2O2as oxidant. Under optimized reaction conditions, the product selectivity follows the order: 4‐bromophenol>2‐bromophenol, both for molybdenum and vanadium complexes. Products characterized by GC analysis showed very good conversion of phenol.
An Expedient Lewis‐Acid‐Catalyzed Microwave‐Assisted Domino Approach to Coumarin‐Fused Pyrroles and Related Heterocycles under Neat Conditions
Authors: Yadav Anubha , Gudimella Santosh K. , Samanta Sampak 
Published: November 2019

AbstractA superior Lewis acid‐catalyzed and microwave‐assisted, facile, solvent‐free, one‐pot quick access to a novel class of a set of diversely substituted coumarin, dimedone and naphthoquinone‐fused pyrroles via an annulation reaction between different kinds of carbo‐and heterocyclic enaminones and a group of α‐aroyl/heteroaryl/acetylidene malonates, 3‐aroylidene‐2‐oxindoles is reported. This LUMO‐lowering technique involving a powerful Lewis acid relies on the installation of pyrrole rings good to high chemical yields with a wide scope of diversely substituted substances. Furthermore, a direct C(sp3)‐H hydroxylation of 3‐pyrrolocoumarinyl‐2‐oxindoles to therapeutically exciting 3‐hydroxy‐3‐pyrrolocoumarinyl‐2‐oxindoles bearing a tetra‐substituted chiral carbon center in high yields was achieved under metal‐free conditions.
Imine‐Linked Covalent Organic Cage Porous Crystals for CO2 Adsorption
Authors: Gajula Ramesh Kumar , Kishor Rupak , Prakash. M. Jaya 
Published: November 2019

AbstractIn this study, covalent organic cages (COC‐MI, COC‐PI and COC‐PA) with covalently imine linked molecules were developed for CO2 adsorption. By varying the organic linkers (iso‐phthalaldehyde to para‐phthalaldehyde) tuned the structure and extrinsic porosity such as specific surface area of the organic cages was demonstrated. Additionally, COC‐PI (3.8 cm3/g to 5.7 cm3/g) and COC‐PA (0.43 cm3/g to 0.48 cm3/g) showed the significantly enhancement in CO2 adsorption capacity with increase in temperature from 273 K to 298 K at 1 bar. On the other hand, COC‐MI (1.17 cm3/g to 1.1 cm3/g) cage showed the significant reduction in CO2 adsorption capacity with increase in temperature from 273 K to 298 K at 1 bar. These unusual enhancements of CO2 adsorption capacity within COC‐PI and COC‐PA is elucidated by powder X‐ray diffraction (PXRD), and it is shown that cooperative diffusion and induced crystal lattice expansion in these molecular crystals can enhance the CO2 adsorption capacity. Computational modelling on the COC cages with CO2 reveals the higher binding energy and rigidity at the C=N group during intermolecular interactions enhances the overall CO2 adsorption capacity in the bulk.
CsPbI3 Nanotube Photodetectors with High Detectivity
Authors: Du Zhentao , Fu Dingfa , Teng Jie , Wang Lin , Gao Fengmei , Yang Weiyou , Zhang Hui , Fang Xiaosheng 
Published: November 2019

AbstractIn the present work, the exploration of photodetectors (PDs) based on CsPbI3 nanotubes are reported. The as‐prepared CsPbI3 nanotubes can be stable for more than 2 months under air conditions. It is found that, in comparison to the nanowires, nanobelts, and nanosheets, the nanotubes can be advantageous to be used as the functional units for PDs, which is mainly attributed to the enhanced light absorption ability induced by the light trapping effect within the tube cavity. As a proof of concept, the as‐constructed PDs based on CsPbI3 nanotube present an overall excellent performance with a responsivity (Rλ), external quantum efficiency (EQE) and detectivity of 1.84 × 103 A W−1, 5.65 × 105% and 9.99 × 1013 Jones, respectively, which are all comparable to state‐of‐the‐art ones for all‐inorganic perovskite PDs.
Enzymatic Degradation of Graphene Quantum Dots by Human Peroxidases
Authors: Martín Cristina , Jun Gong , Schurhammer Rachel , Reina Giacomo , Chen Peng , Bianco Alberto , Ménard‐Moyon Cécilia 
Published: November 2019

AbstractCarbon‐based nanomaterials have demonstrated to be potent candidates for biomedical applications. Recently, graphene quantum dots (GQDs) have emerged as an attractive tool for bioimaging, biosensing, and therapy. Hence, studying their biodegradability in living systems is essential to speed up the translation toward real clinical innovations. Here, the enzymatic degradation of GQDs using human myeloperoxidase and eosinophil peroxidase is investigated. Transmission electron microscopy, fluorescence, and Raman spectroscopy are used to evaluate the biodegradation of GQDs. Signs of degradation by both enzymes are observed already after a few hours of incubation with each enzyme, being more evident after a couple of days of treatment. Molecular dynamics simulations show intimate interactions between the enzymes and the GQDs. The conformation of both peroxidases is slightly altered to favor the interactions, while the GQD sheets distort a little to adapt to the surface of the enzymes. The biodegradability of the GQDs ensures their real potential in the practical biomedical applications.
Data provenance and trust establishment in the Internet of Things
Authors: Elkhodr Mahmoud , Alsinglawi Belal 
Published: November 2019

AbstractThe Internet of Things (IoT) is a network of heterogeneous networks encompassing various forms of communications form the current traditional communication models to ubiquitous and pervasive machine to machine communications. In such an ever expanding, dynamic, and complex environment, it becomes vital to know the origin or the source of data and whether this data can be trusted or no. This requires not only accurate, secure, and correct data collection processes; but also provisioning of data provenance throughout the life‐cycle of an IoT device and the data it produces. To this end, this work introduces a provenance‐based trust management solution, which provides a trust establishment mechanism amongst communicating devices in the IoT. It provides a way to quantitatively assess the trustworthiness of data supplied by a given IoT device. Thus, providing a novel solution to preserve data provenance of IoT devices. This IoT data provenance solution extends the capabilities of our previously proposed IoT platform known as the IoT‐management platform, which aimed at preserving the privacy of users in the IoT.
Investigation of mechanical and micro structural properties of geopolymer concrete blended by dredged marine sand and manufactured sand under ambient curing conditions
Authors: Anbarasan Indhumathi , Soundarapandian Nagan 
Published: November 2019

AbstractGeopolymers, an unique class of inorganic polymers are new promising binders which are manufactured by the activation of a solid state alumina‐silicate with a highly alkaline activating solution using thermal drive. In the recent past, geopolymer binders have been found to be the best alternate to cement binders owing to its environmental sustainability (greener materials lead to cleaner environment). Further, its performance in aggressive environment is promising and these binders could become a replacement for cement concrete in aggressive situation where cement concrete turns to be vulnerable. In this paper, an attempt is made to investigate the mechanical and micro structural properties of geopolymer concrete produced using alternative fine aggregates namely dredged marine sand (DMS) and manufactured sand (M‐Sand) in the place of conventional scarce fine aggregate (river sand) under ambient curing conditions. All the tests namely compression, split tensile, flexural and micro structural evaluation have been performed by varying the percentage of DMS and M‐Sand. The experimental investigation followed by micro structural evaluation clearly indicate that DMS can very well be substituted in the place of scarce fine aggregate (river sand) under ambient curing conditions.
Enterococcus faecium supplementation in sows during gestation and lactation improves the performance of sucking piglets
Authors: Lan Ruixia , Kim Inho 
Published: November 2019

AbstractThe aim of this study was to evaluate the effects of Enterococcus faecium DSM 7,134 supplementation on the performance of sows and their litters. A total of 15 primiparous sows (Landrace × Yorkshire) were randomly divided into three treatments with five replicates. Dietary treatments were: CON, basal diet; E1, CON + 0.025% E. faecium; E2, CON + 0.05% E. faecium. No significant differences were observed on body weight and feed intake of lactating sows with E. faecium supplementation, but linearly increased the sow apparent total tract digestibility (ATTD) of dry matter (DM), nitrogen (N) and gross energy (GE; p < .05), and decreased piglets pre‐weaning mortality (p < .05). Piglets from E. faecium‐supplemented sows linearly increased weaning weight, average daily gain (ADG) and gain:feed ratio (p < .05), as well as linearly decreased diarrhoea score (p < .05) in the first weaning week. Piglets from E. faecium‐supplemented sows linearly increased faecal Lactobacillus and Enterococci counts (p < .05), while linearly decreased faecal Escherichia coli counts (p < .05) after weaning. In conclusion, dietary supplementation of E. faecium improved the ATTD of DM, N and GE in lactating sows, as well as improved body weight, ADG and shifted faecal microbiota in their litters.