bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synergistic inhibition effect of N‐(furan‐2‐ylmethyl)‐7H‐purin‐6‐amine and iodide ion for mild steel corrosion in 1 mol/L HCl
Authors: Zhang Weiwei , Li Hui‐Jing , Wang Ankai , Ma Chengshuai , Wang Zhangxiao , Zhang Hao , Wu Yan‐Chao 
Published: October 2019

AbstractThe synergistic inhibition effect of N‐(furan‐2‐ylmethyl)‐7H‐purin‐6‐amine (FYPA) and iodide ion on mild steel corrosion in 1 mol/L HCl was investigated using weight‐loss tests, electrochemical techniques, and surface analysis. The experiments revealed that the FYPA + KI mixture was a temperature‐dependent inhibitor, which strongly inhibited the corrosion of mild steel compared with FYPA. Based on electrochemical results, FYPA and FYPA + KI behaved as mixed‐type inhibitors, and their inhibition efficiencies were 73.66% and 96.01%, respectively. The calculated synergistic parameter value was larger than unity, illustrating that enhancement of inhibition in the presence of KI could be a result of synergistic action. Surface analysis techniques (scanning electron microscope/scanning electrochemical microscope) confirmed the presence of additives on the studied mild steel surface. A plausible mechanism of corrosion inhibition was proposed.
Structure and Properties of PET Nano‐Porous Luminescence Fibers for Fluorescence‐Indicating to Acid Gases
Authors: Shu Dengkun , Xi Peng , Xia Lei , Wang Xiaoqing , Cheng Bowen 
Published: October 2019

AbstractThis work describes the fluorescence‐indicating function to trace acid gases of polyethylene terephthalate (PET) nano‐porous luminescence fibers (PNPLFs) through the analysis of correlation between the concentration of acid gas and fluorescence intensity of organic rare earth complexes dispersed uniformly in the PET nano‐porous structured fibers. The porous structure and large specific surface area of the PET nano‐fibers prepared through electrospinning technology offer the strong adhesive force and good absorption efficiency of PET nano‐porous fibers to acid gases. The fast response ability of benzoic acid organic rare earth complexes to pH value gives the PET nano‐porous luminescence fibers fluorescence‐indicating function to acid gas. Under dry state and in situ conditions, the fluorescence‐indicating to acid gases of PET nano‐porous luminescence fibers can be completed in 10 s. The precise value is 1 ppm. At the same time, repeated cycling experiments show that the PET nano‐porous luminescence fibers have good recycling property, and the recycling life can increase 40‐fold. Coupled with the good mechanical performances that the breaking strength achieves 121.6 cN, the PET nano‐porous luminescence fibers have better potential in the fluorescence‐indicating to acid gases.
The in vivo biocompatibility of titanized polypropylene lightweight mesh is superior to that of conventional polypropylene mesh
Authors: Ai Fang‐Fang , Mao Meng , Zhang Ye , Kang Jia , Zhu Lan 
Published: October 2019

AbstractObjectiveTo evaluate the histological response to and changes in the biomechanical properties of titanized polypropylene lightweight mesh and conventional polypropylene mesh at 1 and 12 weeks following implantation in the sheep vagina.MethodsWe compared a titanized polypropylene lightweight mesh (TiLOOP Mesh) to a conventional polypropylene mesh (Gynemesh PS) in a sheep vagina model. Explants were harvested after 1 and 12 weeks (n = 6/mesh type/time point) for histological observation. After 12 weeks, mesh‐tissue complex specimens were biomechanically assessed by a uniaxial tension system.ResultsOne week after implantation, there was no significant difference in the inflammatory response between the two groups. Twelve weeks after implantation, the TiLOOP light mesh elicited a lower inflammatory response than was observed for the Gynemesh PS (1.44 ± 0.61 vs 2.05 ± 0.80, P = .015). Twelve weeks after implantation, the collagen I/III ratio was lower in the TiLOOP light mesh group than in the Gynemesh PS group (9.41 ± 5.06 vs 15.21 ± 8.21, P = .019). The messenger RNA expression levels of the inflammatory factors interleukin 10 and tumor necrosis factor α were lower in the TiLOOP Mesh group than in the Gynemesh PS group at both 1 and 12 weeks (P < .05). There were no significant differences in any of the evaluated biomechanical characteristics between the two meshes (P > .05).ConclusionAlthough the titanized polypropylene lightweight mesh induces slightly less tissue reactivity and has better in vivo biocompatibility, further studies should be conducted including the complications and the success rate of pelvic organ prolapse in patients before recommending it in pelvic floor reconstruction.
Molecular characteristics of polymerized surfactants: influence of introduced crosslinking agent and monomer concentration
Authors: Senchukova Anna S , Mikhailova Mariya E , Gubarev Alexander S , Lezov Alexey A , Lebedeva Elena V , Makarov Ivan A , Zorin Ivan M , Tsvetkov Nikolay V 
Published: October 2019

AbstractPolymerizable surfactants are currently attracting considerable interest due to their promising applications in various fields of science and engineering. The present work is devoted to studies of crosslinked poly(N‐acryloyl‐11‐aminoundecanoic acid) and sodium poly(N‐acryloyl‐11‐aminoundecanoate) that were synthesized in reaction mixtures of various compositions (i.e. with different amounts of a crosslinking agent and monomer concentrations). The products were studied by viscometry, dynamic light scattering, sedimentation velocity ultracentrifugation, flow birefringence as well as equilibrium and non‐equilibrium electric birefringence. It was established that both intramolecular and intermolecular crosslinks are formed in the polymerization process. Molecular optical methods and electro‐optical methods were used to determine the sizes of macromolecules with intramolecular crosslinks and the structures containing intermolecular crosslinks that were prepared at various concentrations of the monomer and the crosslinking agent. It was demonstrated that a simultaneous decrease in the amount of the crosslinking agent and decrease in the initial monomer concentration during the synthesis resulted in a reduction in the number of intramolecular crosslinks and molecular masses of the synthesized crosslinked macromolecules. © 2019 Society of Chemical Industry
Highly photoemissive polymer–transition metal complexes based on poly(2‐hydroxyethyl) methacrylate
Authors: Stan Corneliu S , Coroaba Adina , Popa Marcel , Ursu Laura E 
Published: October 2019

AbstractThe paper presents several new polymer complexes based on poly(2‐hydroxyethyl) methacrylate (P‐HEMA) and transition metals including Y3+, Eu3+, Tb3+ and Dy3+. Red‐, green‐, blue‐ and yellow‐emitting polymer complexes with remarkable photoluminescent (PL) properties, high degree of transparency and excellent processability both in bulk and in thin film were prepared and investigated. In the case of the prepared P‐HEMA–Eu3+ and P‐HEMA–Tb3+ polymer complexes, divinylbenzene was used as a crosslinker resulting a markedly enhanced PL emission, most probably due to the presence of the benzene rings which improve the efficiency of the energy transfer to the cation emissive centres. The prepared polymer complexes were structurally investigated through Fourier transform infrared and X‐ray photoelectron spectroscopies while atomic force microscopy was used to study the morphology of the prepared thin films. Steady‐state fluorescence spectroscopy and absolute PL quantum yield were used for the investigation of the luminescent properties. The impressive PL emission and the convenience of preparation in bulk or thin films could be important arguments for a wide area of applications ranging from photonic conversion materials in optoelectronic devices (light‐emitting diodes, flat‐panel displays) to full‐colour watermarks on special‐purpose papers or PL inks and coatings. © 2019 Society of Chemical Industry
Crystal Structure Prediction of Bifurazano[3,4‐b:3′,4′‐f][3′′,4′′‐d](BFFO) in the Experimentally Known Monohydrated and Proposed Anhydrous Forms
Authors: Khakimov Dmitry V. , Dzyabchenko Alexandr V. , Pivina Tatyana S. 
Published: October 2019

AbstractBifurazano[3,4‐b:3′,4′‐f][3′′,4′′‐d]xacycloheptatriene (BFFO, C6N6O5) is perspective high‐energy‐density compound. The crystal structure was previously determined for its monohydrate (space group P21/c, Z=4), while it remains unknown for pure BFFO being of primary interest. Herein a theoretical crystal structure prediction of BFFO in both monohydrated and the proposed anhydrous forms is performed. The Coulomb energy was calculated with advanced point charge models reproducing with high accuracy electrostatic potentials of the BFFO and water molecules. The van der Waals energy was calculated with empirical atom‐atom potentials. The global search for energy minima involved enumeration of 35 most likely organic structural classes with one and two independent molecules (Z=1 and 2). A characteristic feature of the energy landscape of an anhydrous BFFO is that the energies of the deepest minima differ very little. However the structures in the space group Pbca, Z=8 and P21/c, Z=8 were found the most energetically preferable. The common feature of predicted BFFO structures is the presence of herring‐bone packing motifs instead of stacking configurations. The detonation pressure and velocity of pure BFFO crystal (presumably a high‐energy explosive) are estimated from the predicted density; the latter occurs to be lower than density of the monohydrate form.
Pesticide comparison of Phylloneta impressa (Araneae: Theridiidae) females, cocoons and webs with prey remnants collected from a rape field before the harvest
Authors: Erban Tomas , Sopko Bruno , Vaclavikova Marta , Tomesova Daniela , Halesova Tatana , Rezac Milan 
Published: October 2019

AbstractBACKGROUNDPesticides or plant protection products (PPPs) are risky for spiders in or near agricultural landscapes. However, the risks posed by pesticides to spiders are largely understudied compared with the risks to pollinators. Here, we investigated the distribution of PPPs in adult females, cocoons and webs with prey remnants of Phylloneta impressa.RESULTSThree sample types were collected from the tops of rapeseed on 18 July (before the harvest). Three different ultraperformance liquid chromatograph coupled with triple‐quadrupole tandem mass spectrometer (UHPLC–QqQ–MS/MS) analyses were performed: (i) pesticides and selected metabolites; (ii) quaternary ammonium pesticides (quats); and (iii) pyrethroids. Overall, 23 compounds, 22 pesticides and the metabolite imidacloprid‐urea were detected. The array of pesticides was largest in webs with prey remnants, and according to evaluation via redundancy analysis (RDA), pesticides were similar in spiders and cocoons; however, data inspection revealed differences in pesticide distribution among these samples. Clothianidin was detected in only female spiders, whereas thiamethoxam prevailed in webs with remnants of prey, and acetamiprid, thiacloprid and imidacloprid were found in all three matrices. One of the most abundant compounds was chlormequat, indicating that quats should be considered a possible risk for these spiders. None of the pyrethroids were detected despite being applied in the sampling area, indicating rapid biodegradation. By contrast, some pesticides were detected despite not being applied in the field, indicating that the source of contamination is prey or particles carried by wind and attached to webs.CONCLUSIONOverall, the results indicate the different distribution or behavior of several pesticides in the spider matrices. © 2019 Society of Chemical Industry
High‐speed mobility on planetary surfaces: A technical review
Authors: Rodríguez‐Martínez David , Van Winnendael Michel , Yoshida Kazuya 
Published: October 2019

AbstractDespite the success so far accomplished in the robotic exploration of the Moon and Mars, the constraints associated with newly proposed mission concepts manifest the need for a faster surface prospection. Increasing driving velocities is being considered as a potential solution to the requirements introduced by these missions. This review presents the benefits and foreseeable challenges of using faster locomotive solutions for space exploration. Information is provided regarding the set of missions that would benefit most from faster locomotive capabilities. Starting by understanding the theoretical framework governing the interaction of wheeled robots operating over loose, sandy terrains, we delve into the foundation of Bekker's classic terramechanic equations—the most frequently used method to predict mobile robots off‐road performance. We highlight its limitations and review the efforts that have been made to expand the range of application of these theories to dynamic wheel–soil interactions. We analyze the existing experimental evidence on the effects of increasing traveling velocities under earthbound, off‐road conditions. By paying special attention to previous experiences on the lunar surface, we outline the challenges that the combination of irregular terrains and a reduced‐gravity field may pose to a fast‐moving exploration rover. The principles, mathematical models, experimental evidence, and experiences presented in this review are meant to aid in the identification of poorly understood and insufficiently studied aspects regarding high‐speed extraterrestrial surface mobility.
2D Materials in Light: Excited‐State Dynamics and Applications
Authors: Li Na , Wang Qiang , Zhang Hao‐Li 
Published: October 2019

AbstractThe development of two‐dimensional (2D) materials have attracted increasing interest due to their unique structure and various potential applications such as opto‐electronic devices and photocatalysis. Our group have contributed to this exciting field by creating novel preparation methods for a various of 2D materials including transition metal dichalcogenides (TMDs), carbon nitrides and single elemental 2D materials from Group 15. Particularly, employing powerful time‐resolved spectroscopic techniques such as femtosecond transient absorption spectroscopy, we elucidated the excited‐state dynamics of 2D materials behind their outstanding performance in photocatalytic and photonic devices. Therefore in this account, we focus on the effective fabrication methods of 2D materials and their photoinduced excited‐state dynamics. Following the introduction in Part 1, we will summarize our novel strategies for fabricating 2D materials (Part 2). Then in Part 3 we will introduce the instrumentation for exploring the photoinduced excited‐state dynamics of the 2D materials spanning a wide time scale from ultrafast fs to slow ms. Part 4 details the applications of the 2D materials in photocatalysis and nonlinear optics determined by their excited‐state physics and chemistry. Part 5 of perspectives summarizes a few future trends of 2D materials on a series of issues like fabrications, dynamic investigations and photonic optoelectronic applications. Collective efforts through researchers from interdisciplinary fields are expected to further push the exciting territory towards a new horizon.
An operator ideal generated by Orlicz spaces
Authors: Mastyło Mieczysław 
Published: October 2019

Abstract
Absolutely $$\varphi $$φ-summing operators between Banach spaces generated by Orlicz spaces are investigated. A variant of Pietsch’s domination theorem is proved for these operators and applied to prove vector-valued inequalities. These results are used to prove asymptotic estimates of $$\pi _\varphi $$πφ-summing norms of finite-dimensional operators and also diagonal operators between Banach sequence lattices for a wide class of Orlicz spaces based on exponential convex functions $$\varphi $$φ. The key here is the description of a space of coefficients of the Rademacher series in this class of Orlicz spaces, proved via interpolation methods. As by-product, some absolutely $$\varphi $$φ-summing operators on the Hilbert space $$\ell _2$$ℓ2 are characterized in terms of its approximation numbers.
Evaluation of the “Freiburg Acuity VEP” on Commercial Equipment
Authors: Bach Michael , Farmer Jeffrey D. 
Published: October 2019

Abstract

Purpose
To assess the implementation and outcome quality of the Freiburg Acuity VEP methodology (Bach et al. in Br J Ophthalmol 92:396–403, 2008) on the Diagnosys Espion Profile and E3 electrophysiology systems.

Methods
We recorded visual evoked potentials (VEPs) from both eyes of 24 participants, where visual acuity (VA) was either full or reduced with scatter foils to approximately 0.5 and 0.8 LogMAR, resulting in a total of 144 recordings. Behavioral VA was measured in each case under the same conditions using the Freiburg Acuity Test (FrACT); VEP-based acuity was assessed with the “heuristic algorithm,” which automatically selects points for regression to zero amplitude.

Results
Behavioral VA ranged from − 0.2 to 1.0 LogMAR. The fully automatic heuristic VEP algorithm resulted in 8 of 144 recordings (6%) that were scored as “no result.” The other 136 recordings (94%) had an outcome of − 0.20 to 1.3 LogMAR (which corresponds to a range of 20/12.5–20/400, or 6/3.8–6/120, in Snellen ratios; or 1.6–0.1 in decimal acuity). The heuristic VEP algorithm agreed with the behavioral VA to within ± 0.31 LogMAR (95% limits of agreement), which is equivalent to approximately three lines on a VA chart.

Conclusions
The successful implementation of the Freiburg Acuity VEP “heuristic algorithm” on a commercial system makes this capability available to a wider group of users. The limits of agreement of ± 0.31 LogMAR are close to the original implementation at the University of Freiburg and we believe are clinically acceptable for a fully automatic, largely objective assessment of visual acuity.
The Hole Argument in Homotopy Type Theory
Authors: Ladyman James , Presnell Stuart 
Published: October 2019

AbstractThe Hole Argument is primarily about the meaning of general covariance in general relativity. As such it raises many deep issues about identity in mathematics and physics, the ontology of space–time, and how scientific representation works. This paper is about the application of a new foundational programme in mathematics, namely homotopy type theory (HoTT), to the Hole Argument. It is argued that the framework of HoTT provides a natural resolution of the Hole Argument. The role of the Univalence Axiom in the treatment of the Hole Argument in HoTT is clarified.
Feasibility and Effectiveness of Different Models of Team-Based Learning Approaches in STEMM-Based Disciplines
Authors: Parappilly Maria , Woodman Richard John , Randhawa Sharmil 
Published: October 2019

AbstractThis study presents findings from three different disciplines in STEMM (Science, Technology, Engineering, Mathematics and Medicine) and across different models of student-focused teaching. Specifically, we assessed the feasibility and effectiveness of flipped classroom approaches combined with team based learning (TBL), and TBL alone within STEMM, particularly in the disciplines of Physics, Engineering and Medicine across different year levels. TBL activities were incorporated into undergraduate Physics and Engineering cohorts, with students from a diverse range of majors and backgrounds and a graduate level Doctor of Medicine (MD) cohort. Quiz scores from the Physics cohort were significantly improved following TBL, exam scores from the engineering cohort were more evenly distributed than pre-TBL quiz scores and students in the medical cohort had higher quiz scores when working within teams rather than alone. Qualitative survey responses from both the physics and engineering cohorts indicated that students felt TBL was positive and increased their understanding of key concepts. Informal feedback from medical students following TBL classes was also very positive and students demonstrated obvious engagement. Comparisons for pre- versus post-TBL quiz scores for Physics, for pre-TBL quartile versus exam scores in Engineering and for Team versus Individual learning quiz scores in Medicine all provide evidence of effective student engagement and performance. The observation study suggests that TBL is a feasible and effective method of student-focused learning within STEMM. More rigorously designed studies are now required to further explore these findings.
mTOR inhibitor everolimus reduces invasiveness of melanoma cells
Authors: Ciołczyk-Wierzbicka Dorota , Gil Dorota , Zarzycka Marta , Laidler Piotr 
Published: October 2019

AbstractThe mammalian target of rapamycin (mTOR) plays a key role in several cellular processes: proliferation, survival, invasion, and angiogenesis, and therefore, controls cell behavior both in health and in disease. Dysregulation of the mTOR signaling is involved in some of the cancer hallmarks, and thus the mTOR pathway is an important target for the development of a new anticancer therapy. The object of this study is recognition of the possible role of mTOR kinase inhibitors—everolimus single and in combination with selected downstream protein kinases inhibitors: LY294002 (PI3 K), U0126 (ERK1/2), GDC-0879 (B-RAF), AS-703026 (MEK), MK-2206 (AKT), PLX-4032 (B-RRAF) in cell invasion in malignant melanoma. Treatment of melanoma cells with everolimus led to a significant decrease in the level of both phosphorylated: mTOR (Ser2448) and mTOR (Ser2481) as well as their downstream effectors. The use of protein kinase inhibitors produced a significant decrease in metalloproteinases (MMPs) activity, as well as diminished invasion, especially when used in combination. The best results in the inhibition of both MMPs and cell invasiveness were obtained for the combination of an mTOR inhibitor— everolimus with a B-RAF inhibitor—PLX-4032. Slightly less profound reduction of invasiveness was obtained for the combinations of an mTOR inhibitor—everolimus with ERK1/2 inhibitor—U126 or MEK inhibitor—AS-703026 and in the case of MMPs activity decrease for PI3 K inhibitor—LY294002 and AKT inhibitor—MK-2206. The simultaneous use of everolimus or another new generation rapalog with selected inhibitors of crucial signaling kinases seems to be a promising concept in cancer treatment.