bluuebunny/crossref_metadata_2025_split huggingface dataset:
Explication of bovine serum albumin binding with naphthyl hydroxamic acids using a multispectroscopic and molecular docking approach along with its antioxidant activity
Authors: Agrawal Rainy , Siddiqi Mohammad Khursheed , Thakur Yamini , Tripathi Mamta , Asatkar Ashish K. , Khan Rizwan Hasan , Pande Rama 
Published: June 2019

AbstractIn the present investigation, the protein‐binding properties of naphthyl‐based hydroxamic acids (HAs), N‐1‐naphthyllaurohydroxamic acid (1) and N‐1‐naphthyl‐p‐methylbenzohydroxamic acid (2) were studied using bovine serum albumin (BSA) and UV–visible spectroscopy, fluorescence spectroscopy, diffuse reflectance spectroscopy–Fourier transform infrared (DRS–FTIR), circular dichroism (CD), and cyclic voltammetry along with computational approaches, i.e. molecular docking. Alteration in the antioxidant activities of compound 1 and compound 2 during interaction with BSA was also studied. From the fluorescence studies, thermodynamic parameters such as Gibb's free energy (ΔG), entropy change (ΔS) and enthalpy change (ΔH) were calculated at five different temperatures (viz., 298, 303, 308, 313 or 318 K) for the HAs–BSA interaction. The results suggested that the binding process was enthalpy driven with dominating hydrogen bonds and van der Waals’ interactions for both compounds. Warfarin (WF) and ibuprofen (IB) were used for competitive site‐specific marker binding interaction and revealed that compound 1 and compound 2 were located in subdomain IIA (Sudlow's site I) on the BSA molecule. Conclusions based on above‐applied techniques signify that various non‐covalent forces were involved during the HAs–BSA interaction. Therefore the resulted HAs–BSA interaction manifested its effect in transportation, distribution and metabolism for the drug in the blood circulation system, therefore establishing HAs as a drug‐like molecule.
What does targeting ecological sustainability mean for company financial performance?
Authors: De Mendonca Taryn , Zhou Yan 
Published: June 2019

AbstractThis study empirically examines the effects of companies' environmental orientation on their long‐run financial performance. It also examines the mediating roles of environmental legitimacy and environmental performance. We use PLS‐SEM among a sample of large U.S.‐based companies. The results show that an environmental orientation that targets ecological sustainability is directly and positively associated with the debt ratio and with long‐run market value but to a lesser degree than what is obtained by not targeting ecological sustainability. Targeting ecological sustainability has a greater positive impact on environmental legitimacy than not targeting ecological sustainability. Environmental legitimacy, but not environmental performance, mediates the link between environmental orientation and long‐run profitability and market value. These findings suggest that targeting ecological sustainability is important for improving environmental legitimacy, but companies are not proactive in improving environmental performance. This study offers insights to managers for improving financial performance by targeting ecological sustainability.
Elusive expectations for a novel program design: Contrast between program intentions and student recruitment and retention
Authors: Exter Marisa , Ashby Iryna , Caskurlu Secil 
Published: June 2019

AbstractBackgroundStudent recruitment and retention are essential to the vitality of any program, but are often difficult to achieve, particularly for new and/or alternative programs.AimsThis qualitative study explores the factors that influence students' enrollment in, and subsequent decision to continue in or leave a pilot on‐campus program within a large traditional university. The program design integrated nontraditional components that likely have not previously been combined in this form.MethodsStudents (N = 33) were surveyed and interviewed throughout the year to explore their reasons for enrolling the program and reasons why they decided to continue with the program or leave. Constant comparative method for naturalistic inquiry was used to identify themes.ResultsResults showed that many of the factors influencing students' decisions to join, stay, or leave, such as university reputation and perception of program fit, were similar to those for traditional programs. However, program novelty and unique program design elements also contributed to students' decision to join, stay, or leave the program. Students' uncertainty about transfer of credit, grading, and how to succeed in the program also contributed to these decisions. The very traits some students found most attractive were unattractive to others. We contend that new, nontraditional programs need to ensure institutional alignment, provide scaffolding to support new students in acclimating to nontraditional program aspects, and align recruitment materials with program aspects to attract diverse students for whom the program is a good fit. Implications, limitations, and future research are discussed.
Atomically Dispersed Bimetallic FeNi Catalysts as Highly Efficient Bifunctional Catalysts for Reversible Oxygen Evolution and Oxygen Reduction Reactions
Authors: Cheng Yi , He Shuai , Veder Jean‐Pierre , De Marco Roland , Yang Shi‐ze , Ping Jiang San 
Published: June 2019

AbstractBimetallic atomically dispersed FeNi catalysts anchored on N‐doped carbon nanotube with catalyst loading of 2–7 wt % with different Fe : Ni ratio have been developed as highly active and stable bifunctional catalyst for reversible oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) for metal air batteries via a modified one‐pot synthesis method. Compared with atomically dispersed single Fe and Ni catalysts, the bimetallic FeNi catalysts exhibit outstanding performance for reversible OER and ORR, achieving a low potential gap (ΔE) of 0.81 V to deliver an OER current density of 10 mA cm−2 and an ORR current density of 3 mA cm−2. The FeNi electrodes also show a much better stability in the cyclic tests, compared to that of the state‐of‐the‐art Pt/C and Pt/C+Ir/C electrodes for reversible OER and ORR. The high performance is likely due to the significantly enhanced OER activity contributed by the introduction of Ni atoms, forming bridged FeNi bimetallic dual atom active sites for OER. This study provides a new platform for the development of highly active bimetallic atomic catalysts based bifunctional electrocatalysts for metal‐air batteries. The modified one‐pot synthesis methods demonstrated in this study can also be applicable to other atomically dispersed catalysts on CNTs or graphenes.
Fabrication of a Light‐Weight Dual‐Function Modified Separator towards High‐Performance Lithium‐Sulfur Batteries
Authors: Yi Ruowei , Lin Xiangfei , Zhao Yinchao , Liu Chenguang , Li Yinqing , Hardwick Laurence J. , Yang Li , Zhao Cezhou , Geng Xianwei , Zhang Qian 
Published: June 2019

AbstractA light‐weight dual‐functional modified separator for lithium–sulfur batteries is prepared through a physical blend and blade‐coating approach. The separator is coated with carbon black/poly(3,4‐ethylene dioxythiophene):poly(styrene sulfonate) (CB/PEDOT:PSS), remarkably improving the utilization of sulfur by serving as the co‐current collector. Moreover, the PEDOT:PSS effectively inhibits the diffusion of polysulfides and promotes the migration of lithium ions by providing chemical absorption and cation transport acceleration. When assembling this modified separator into the coin cell, an initial specific capacity of 1315 mAh g−1 at 0.2 C is achieved with a capacity of 956 mAh g−1 after 100 cycles, showing a superior performance compared to the cell without an interlayer. Meanwhile, the cell exhibits a rate capability with a discharge capacity of 699 mAh g−1 at a current density of 2 C. Notably, the areal density of CB/PEDOT:PSS coating is as low as 0.604 mg cm−2, bringing a specific electrode capacity of 522 mAh g−1 at 1 C.
Template‐Assisted Synthesis of Honeycomb‐Like CoFe2O4/CNTs/rGO Composite as Anode Material for Li/Na‐Ion Batteries
Authors: Zhao Min , Xiong Jian , Yang Yang , Zhao Jinbao 
Published: June 2019

AbstractCoFe2O4 is a fascinating anode material due to its high theoretical capacity. However, the low electronic conductivity, limited electrochemical kinetics and huge volume expansion lead to poor electrochemical performance. Here, the CoFe2O4/CNTs/rGO ternary composite with a honeycomb‐like structure (PS‐CFO/CNTs/rGO) has been synthesized via a spray drying method assisted by polystyrene (PS) soft template. The rational 3D porous structure design not only enhances the transport capacity of Li/Na ions, but also provides buffer spaces for alleviating volume expansion, resulting in rapid electrochemical kinetics and improved electrode integrity during cycling. In particular, to improve the electrochemical performance, a facile pre‐treatment process combining heat‐treatment and pre‐sodiation treatment is first developed for the anode materials of sodium‐ion batteries (SIBs). As a result, at 1 A g−1 after 365 cycles, the pronounced capacity of PS‐CFO/CNTs/rGO composite can be maintained at 750 mAh g−1 for lithium‐ion batteries (LIBs), and after 5000 cycles, maintained at 195 mAh g−1 for the SIBs.
On‐Surface Synthesis and Characterization of Acene‐Based Nanoribbons Incorporating Four‐Membered Rings
Authors: Sánchez‐Sánchez Carlos , Dienel Thomas , Nicolaï Adrien , Kharche Neerav , Liang Liangbo , Daniels Colin , Meunier Vincent , Liu Junzhi , Feng Xinliang , Müllen Klaus , Sánchez‐Valencia Juan Ramón , Gröning Oliver , Ruffieux Pascal , Fasel Roman 
Published: June 2019

AbstractA bottom up method for the synthesis of unique tetracene‐based nanoribbons, which incorporate cyclobutadiene moieties as linkers between the acene segments, is reported. These structures were achieved through the formal [2+2] cycloaddition reaction of ortho‐functionalized tetracene precursor monomers. The formation mechanism and the electronic and magnetic properties of these nanoribbons were comprehensively studied by means of a multitechnique approach. Ultra‐high vacuum scanning tunneling microscopy showed the occurrence of metal‐coordinated nanostructures at room temperature and their evolution into nanoribbons through formal [2+2] cycloaddition at 475 K. Frequency‐shift non‐contact atomic force microscopy images clearly proved the presence of bridging cyclobutadiene moieties upon covalent coupling of activated tetracene molecules. Insight into the electronic and vibrational properties of the so‐formed ribbons was obtained by scanning tunneling microscopy, Raman spectroscopy, and theoretical calculations. Magnetic properties were addressed from a computational point of view, allowing us to propose promising candidates to magnetic acene‐based ribbons incorporating four‐membered rings. The reported findings will increase the understanding and availability of new graphene‐based nanoribbons with high potential in future spintronics.
Empowering Synthesis of Complex Natural Products
Authors: Hernandez Lucas W. , Sarlah David 
Published: June 2019

AbstractSynthesis of natural products remains a daring task. Their richly diverse and intricate structures often encompass a large degree of unsaturation, contain fused and/or bridged rings, or possess numerous stereogenic centers. Thus, their preparation requires significant synthetic overhead, detracting from their overall practicality as well as hampering the ability of medicinal chemists to synthesize derivatives for pharmaceutical optimization and structure‐activity relationship studies. The purpose of this Minireview is to showcase recent examples of efficient total syntheses. Emphasis was not given to the evaluation of ideality or economies (quality), but rather to the practicality (quality with quantity).
Laser‐Assisted Doping and Architecture Engineering of Fe3O4 Nanoparticles for Highly Enhanced Oxygen Evolution Reaction
Authors: Cai Mingyong , Pan Rui , Liu Weijian , Luo Xiao , Chen Changhao , Zhang Hongjun , Zhong Minlin 
Published: June 2019

AbstractThe design and synthesis of cost‐effective and highperformance oxygen evolution reaction (OER) electrocatalysts for water splitting based on earth‐abundant elements is urgent but challenging. A synergistic doping and architecture engineering strategy by nanosecond laser ablation is used to generate a unique kind of highly disordered Ni‐doped Fe3O4 nanoparticle clusters. Ni dopant and increased oxygen vacancies are simultaneously incorporated into Fe3O4 frameworks and thereby modulate the electronic configuration for an optimal binding affinity towards OER intermediates. Nanoparticles with average size of around 5 nm assemble randomly during laser ablation and construct a fluffy and porous architecture, which not only optimizes the number of exposed active sites but also accelerates mass transfer. Consequently, Ni‐doped Fe3O4 clusters are revealed as a superior OER catalyst with a small overpotential of 272 mV at 10 mA cm−2 and a small Tafel slope of 39.4 mV dec−1, surpassing almost all spinel Fe‐based OER catalysts. This work provides a new strategy to fabricate advanced cation‐doped metal oxide nanostructures for related energy applications.
Are cytologic and histopathologic features of hot thyroid nodules different from cold thyroid nodules?
Authors: Baser Husniye , Topaloglu Oya , Bilginer Muhammet C. , Ulusoy Serap , Kılıcarslan Aydan , Ozdemir Elif , Ersoy Reyhan , Cakir Bekir 
Published: June 2019

AbstractBackgroundWe aimed to compare the cytology and histopathology results of hot, cold, and warm nodules in patients who had thyroidectomy due to toxic multinodular goiter (TMNG).MethodsFive hundred and nine thyroid nodules from 413 patients who had operation with TMNG were included in this retrospective study. The nodules were categorized as hot, cold, and warm groups. The cytology and histopathology results were compared.ResultsThe 509 thyroid nodules were grouped as hot (n = 364 [71.5%]), cold (n = 122 [24.0%]), and warm (n = 23 [4.5%]) according to scintigraphy. Cytological evaluations of 364 hot nodules were as follows: 80 (22%) nondiagnostic (ND), 259 (71.2%) benign, 17 (3.6%) atypia of undetermined significance/follicular lesion of undetermined significance (AUS/ FLUS), 2 (0.5%) follicular neoplasm/suspicious for follicular neoplasm (FN/SFN), 2 (0.5%) suspicious for malignancy (SM), and 4 (1.1%) malignant. The cytology of 122 cold nodules were ND in 25 (20.5%), benign in 86 (70.5%), AUS/FLUS in 8 (6.6%), FN/SFN in 1 (0.8%), and finally SM in 2 (1.6%). The 23 warm nodules were determined as ND, benign, and FN/SFN in 7 (30.4%), 15 (65.2%) and 1 (4.3%), respectively. There were no differences according to cytological results between groups (P = .616).However, malignancy rate was 3.8% in hot nodules, it was found as 6.6% in cold nodules. The malignancy was detected in 4.3% of warm nodules. There were no differences in malignancy rates between groups (P = .459).ConclusionWe demonstrated similar malignancy rates in hot nodules when compared with cold and warm nodules.
Improving ROSE: Discrepant touch preparation and histology findings in cytology of renal masses: A 10‐year retrospective review
Authors: Shachner Tracy R. , Nodit Laurentia , Hubbard Elizabeth , Van Meter Stuart 
Published: June 2019

AbstractBackgroundThe number of “renal incidentalomas” is on the rise due to increasing use of radiologic studies. Image‐guided core needle biopsies (CNB) with touch preparations are performed to guide specimen collection and triage of sample for additional studies. Results allow the clinical team to make appropriate treatment decisions.DesignOur electronic database was searched for a 10‐year period to identify 180 image‐guided biopsies of renal masses with rapid on‐site evaluations (ROSE) and corresponding biopsy/resection specimens. Touch preparations were classified as non‐diagnostic, negative/benign, adequate/positive for malignancy/oncocytic predominance, or atypical. These results were compared to the final diagnosis on the biopsy or resection specimen (if available). Diagnostic accuracy, sensitivity, specificity, and positive and negative predictive values were determined. Non‐diagnostic cases and cases in which ROSE and final diagnosis were discordant were reviewed by cytopathologists blinded to the original interpretation to reconcile discrepancies and highlight interpretation pitfalls.ResultsA ROSE diagnosis was rendered in 133 of 180 cases; 47 cases were non‐diagnostic. Of the 133 diagnostic cases, the ROSE diagnosis was concordant with the core biopsy final diagnosis in 125 cases, yielding a diagnostic accuracy of 94%. The overall sensitivity was calculated to be 80.1%; specificity 72.4%; positive predictive value 94%; and negative predictive value 41.2%.ConclusionsTouch preparation slides are vital but imperfect tools in evaluating renal masses. In our study, distinction between malignant and benign samples was accomplished in most cases (94% accuracy), but there are limitations. Awareness of interpretation pitfalls allows informed decisions to be made regarding specimen collection and patient management.
Sensitivity of plant species to warming and altered precipitation dominates the community productivity in a semiarid grassland on the Loess Plateau
Authors: Su Fanglong , Wei Yanan , Wang Fuwei , Guo Jiuxin , Zhang Juanjuan , Wang Yi , Guo Hui , Hu Shuijin 
Published: June 2019

AbstractGlobal warming and changes in precipitation patterns can critically influence the structure and productivity of terrestrial ecosystems. However, the underlying mechanisms are not fully understood. We conducted two independent but complementary experiments (one with warming and precipitation manipulation (+ or – 30%) and another with selective plant removal) in a semiarid grassland on the Loess Plateau, northwestern China, to assess how warming and altered precipitation affect plant community. Our results showed that warming and altered precipitation affected community aboveground net primary productivity (ANPP) through impacting soil moisture. Results of the removal experiment showed competitive relationships among dominant grasses, the dominant subshrub and nondominant species, which played a more important role than soil moisture in the response of plant community to warming and altered precipitation. Precipitation addition intensified the competition but primarily benefited the dominant subshrub. Warming and precipitation reduction enhanced water stresses but increased ANPP of the dominant subshrub and grasses, indicating that plant tolerance to drought critically meditated the community responses. These findings suggest that specie competitivity for water resources as well as tolerance to environmental stresses may dominate the responses of plant communities on the Loess Plateaus to future climate change factors.
A burrowing ecosystem engineer positively affects its microbial prey under stressful conditions
Authors: Bell Laura , Cuddington Kim 
Published: June 2019

AbstractSpecies that facilitate others under stressful conditions are often ecosystem engineers: organisms that modify or create physical habitat.However, the net effect of an engineering species on another depends on both the magnitude of the direct interactions (e.g., competition or predation) and the specific environmental context.We used a laboratory system to isolate the trophic and engineering impacts of a predator, the nematodeCaenorhabditis remanei, on its prey,Escherichia coliunder different levels of environmental stress. We predicted that under stressful surface conditions the nematodes would positively impact their prey by creating burrows which protected the bacteria.Colony plate counts ofE. coliindicated that there was a stress‐induced change in the net impact of nematodes on bacteria from neutral to positive. Predator engineering in the form of burrowing allowed larger bacteria populations to survive.We conclude that even in a simple two‐species system a predator can positively impact prey via ecosystem engineering.
Cardanol‐Based Epoxy Monomers for High Thermal Properties Thermosets
Authors: Mora Anne‐Sophie , Decostanzi Mélanie , David Ghislain , Caillol Sylvain 
Published: June 2019

In this paper, epoxy‐anhydride networks are synthesized from a new product of Cardolite Corporation: the Cardolite GX‐2551 epoxy monomer. Due to the complexity of the GX‐2551 structure, an NMR study is performed first to characterize this new commercial product. This epoxy monomer is then reacted with an anhydride (MHHPA) to form polyepoxide thermosets. After curing, dynamic mechanical and thermal analyses are performed for the different thermosets, and then the results are compared to each other.Practical Applications: The cardanol‐derived epoxy monomer described in this contribution, i.e., fully epoxidized molecular cardanol, is a new fully biobased monomer for further epoxy thermoset synthesis. The resulting polyepoxide networks exhibit much higher thermo‐mechanical properties than previous cardanol‐derived epoxy thermosets.Two cardanol‐based epoxy monomers are fully characterized. The GX2551 is reported for the first time and exhibits a higher renewable carbon content. Both monomers are reacted with hexahydro‐4‐methylphtalic anhydride to yield bio‐based aromatic polyepoxide networks with interesting mechanical and thermal properties.
On the Effect of Minor Oil Components on β‐Sitosterol/γ‐oryzanol Oleogels
Authors: Scharfe Maria , Ahmane Yassin , Seilert Julia , Keim Jonathan , Flöter Eckhard 
Published: June 2019

The role of solvent composition (polar minor components, PC) on β‐sitosterol/γ‐oryzanol oleogel formation, appearance, and properties is studied. Solvent composition is altered via thermal treatment and the elimination of natural PC from untreated sunflower and canola oil. A maximum in oleogel hardness is found. DSC reveals that sol‐gel transition is increasingly suppressed with the level of PC. This is attributed to two distinct mechanisms: enlarged interactions of PC with the structuring elements and a reduction in diffusion due to a higher solvent viscosity. Gel‐sol‐transition consists of two concurrent processes: decomposition of tube bundles (peak fronting) and the dissolution of tubes (peak). The peak area decreases with increasing solvent permittivity while simultaneously the area of the fronting increases. Gel‐sol‐transition temperatures are practically invariable for all samples indicating that the maximum in gel hardness cannot be related to changes in the solubility of the sterols. AFM microscopy reveals that the arrangement of the elements of scaffolding changes considerably with the level of PC. This work demonstrates the strong impact of PC on the self‐assembly of β‐sitosterol/γ‐oryzanol and oleogel properties. A detailed characterization of the oils is thus inevitable to perform trustworthy research.Practical Applications: It is widely known that a high intake of saturated fatty acids increases the risk of suffering from cardiovascular diseases. Unfortunately, their ability to provide unique texture to food products can hardly be met. Oleogelation has the potential to deliver the solid structure necessary for various fat‐based food products by transferring an oil rich in essential fatty acids into a solid‐like structure. Moreover, the nutritional value of these oils remains nearly unchanged. It is found that oil composition, precisely the fatty acid composition of the TAGs and minor oil components have a profound impact on oleogel properties. Fundamental understanding of network properties and formation of oleogels helps to maximize their capability for industrial application. The work presented reveals that detailed documentation of the quality of the oils, in particular the fatty acid composition and presence of polar minor components, is a necessary prerequisite to conduct reliable scientific work in the field oleogel research.Hardness and spatial arrangement of network building blocks of of β‐sitosterol/γ‐oryzanol oleogels is modified in the presence/absence of polar minor components.