Miracle-dz/UniFAR-FTUs huggingface dataset:
Hydrogen Oxidation on Ni-Based Electrocatalysts: The Effect of Metal Doping

Carbon supported nanoparticles of monometallic Ni catalyst and binary Ni-Transition Metal (Ni-TM/C) electrocatalytic composites were synthesized via the chemical reduction method, where TM stands for the doping elements Fe, Co, and Cu. The chemical composition, structure and morphology of the Ni-TM/C materials were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM) and energy-dispersive X-ray spectroscopy (EDS). The electrochemical properties towards hydrogen oxidation reaction in alkaline medium were studied using the rotating disc electrode and cycling voltammetry methods. A significant role of the TM dopants in the promotion of the hydrogen electrooxidation kinetics of the binary Ni-TM/C materials was revealed. A record-high in exchange current density value of 0.060 mA cm2Ni was measured for Ni3Fe1/C, whereas the monometallic Ni/C counterpart has only shown 0.039 mA cm2Ni. In order to predict the feasibility of the electrocatalysts for hydrogen chemisorption, density functional theory was applied to calculate the hydrogen binding energy and hydroxide binding energy values for bare Ni and Ni3TM1.
The Influence of Earnings Management and Board Characteristics on Company Efficiency

Earnings management is a means by which managers manipulate earnings to conceal the true performance of a company. The characteristics of the board of directors can also influence firm performance. This study applies data envelopment analysis (DEA) and the Tobin regression model to investigate the influence of earnings management and board characteristics on company efficiency. The data sample includes 396 Taiwanese electronics and biotechnology companies from 2009 to 2017. The results indicate that earnings management has an insignificant influence on company efficiency with mixed results on the interactions between earnings management and board characteristics. When companies practiced earnings management, director experiences, a higher proportion of female directors, and a higher number of board meetings increased company efficiency. In contrast, a higher number of independent directors and a higher attendance rate of the directors at the board meeting decreased company efficiency. The results of this study suggest that board diversity, more female directors, and meetings could still improve firm performance despite companies’ engagement in earnings management.
Correlation and Path Analysis Studies on Yield and Yield Components in Musk Melon (Cucumis melo L.)

Problem: The correlation co-efficient indicates the nature of association among the different traits, path analysis splits the correlation co-efficient into measure of direct and indirect effects thus providing understanding of the direct and indirect association of each character towards yield. Methods: An experiment on correlation and path analysis involving thirty F1 and six parents in muskmelon (Cucumis melo L.) was carried out at Department of Horticulture, Adhiparasakthi Agricultural College, Kalavai, Vellore district, Tamil Nadu India. Results: The fruit yield per plant had exhibited highly significant and positive correlation with individual fruit weight (0.845), fruit diameter (0.656), fruit length (0.536) and flesh thickness (0.503). Path coefficient analysis revealed that the characters viz., fruit weight exerted the highest positive direct effect (1.034) on fruit yield per vine followed by number of fruits per vine (0.497), days to first female flower anthesis (0.088), vine length (0.072) and fruit length (0.070). Conclusion: The fruit yield per plant can be improved by making selection of these traits in yield improvement programme.
Polymer-hybrid silica composite for the azo dye removal from aqueous solution

Abstract The article presents a cost-effective approach to the preparation of polymer-hybrid silica composites in the form of spherical beads, a micrometer in size, which are easy to handle and completely water wettable. Taking into account the swelling phenomenon of the Amberlite XAD7 HP resin, tetramethoxysilane and [3-(2-aminoethylamino)propyl]trimethoxysilane were introduced into polymeric particles with different molar fractions, which was followed by their hydrolysis and condensation in the vapor phase; as a result polymer-amino-functionalized silica systems were formed. The article discusses the characteristics of the composites and their performance on the Cochineal Red A (Ponceau 4R) adsorption and desorption. The composite azo dye adsorption capacity is much higher (up to ×100) than for the parent polymer and reaches about 46 mg g−1. The desorption of azo dye from composites can be enhanced by the modification of the pH of the release medium. Thus, the described materials may be regarded as effective adsorbents for the colorant removal. Graphical Abstract
Developmental Trajectories of Adult Romantic Attachment: Assessing the Influence of Observed Interactions With Family of Origin

The present study evaluates longitudinal trajectories of adult romantic attachment during adulthood using latent growth curve modeling. We also tested how observed family interactions were related to trajectories of attachment-related anxiety and avoidance from ages 25 to 31 years (on average). Stability coefficients for attachment variables across 6 years were around . 50. Growth modeling results suggested that people tend to become less anxious as they mature into adulthood and that there were individual differences in changes during this period. Although family interaction quality in the adolescent years predicted levels of romantic attachment anxiety and avoidance in young adulthood, this association did not extend to changes in attachment between the ages of 25–31 years. Overall, it seems that attachment variables demonstrate some degree of consistency over time even as the average trend is for declines in anxiety. Moreover, adolescent interactions with parents were not strong predictors of changes in attachment during adulthood. This is consistent with the view that family relationships during adolescence are associated more strongly with the stable components of attachment rather than dynamic aspects in adulthood.
Theoretical frameworks for the development of surface reaction mechanisms

A class-based framework for generation of heterogeneous reaction mechanisms has been proposed. The framework consists of a transition state theory method for estimating adsorption and desorption rate parameters, two-dimensional collision theory for homogeneous surface reactions and the unity bond index–quadratic exponential potential (UBI– QEP) for estimation of barrier heights. The framework has been developed to address the reliance of customary approaches on experimental sticking coe cients, and provide a fully self-consistent method for mechanism development on novel metals. Two di erent implementations of transition state theory have been considered, with the variational approach (VTST) showing improved quantitative results and higher robustness at negligible additional computational expense. Mechanisms prepared using this framework have been validated against a wide range of experimental data. On platinum, the VTST-based mechanism was applied for hydrogen, syngas, ethane and methane combustion. A new mechanism has been also developed for methane combustion on rhodium. The mechanisms have been applied under fuel-lean and fuel-rich conditions, various geometries, pressures and inlet velocities. The performance is generally better or as good as the optimised collision theory based determinations. The compatibility of the framework with high-accuracy density functional theory (DFT) data has been established using a case study of ethane adsorption on oxygen-covered platinum. At temperatures below 1500 K, the DFT study predicted considerably slower rate constants than the VTST approach. However, for the studied cases, the mol fraction proles calculated with the VTST based rate determinations were in acceptable agreement with the experimental data. The developed method reproduces experimental data without the reliance on sticking coe cients, and facilitates the e cient generation of novel heterogeneous reaction mechanisms.
Motivational Context and Perfectionism Traits in Pediatric Sports

In sports, one of the social agents who can pressure an athlete for perfection in their performance is their coach. However, perfectionism has many potential negative consequences such as excessive concerns over even minor mistakes. The purpose of this study is to test a sequential model: the motivational context (i.e., task- and ego-involving climates generated by the coach and a coach’s support for autonomy) and the facets that determine the level of perfectionism exhibited as a trait (i.e., perceived coach pressure—a facet of socially prescribed perfectionism—and concerns over mistakes—a facet of self-oriented perfectionism). The sample included 317 athletes (133 boys and 184 girls) aged between 10 and 14 years, who answered a battery of questionnaires that evaluated an athlete’s perception of their motivational climate, their perception of support for autonomy, their perceived coach pressure and their concerns over mistakes. Using the structural equations model, the results showed that the task-involving climate was negatively correlated with perceived coach pressure, whereas the ego-involving climate and support for autonomy were positively correlated with perceived coach pressure and were positively correlated with concerns over mistakes. Finally, perceived coach pressure did not influence concerns over mistakes from the motivational context. This study highlights the importance of considering motivational contexts as important motivational elements of perfectionism in youth sports.
Exploration of Potential Bacterial Endophytes against Root Knot Nematode, Meloidogyne incognita in Banana

A field survey was conducted in 12 districts of Assam viz., Jorhat, Golaghat, Nagaon, Marigaon, Goalpara, Dibrugarh, Tinsukia, Lakhimpur, Dhemaji, Sivsagar, Kamrup and Barpeta. A total of 92 root samples were collected and 37 bacterial isolates were isolated from commercial banana cultivars. The culture filtrates extracted from 37 endophytic bacterial isolates, were screened against southern root-knot nematode, Meloidogyne incognita in vitro and under pot culture studies. The five bacterial isolates viz., EB4, EB8, BC1, BC11 and BC12 showed 100% inhibition of egg hatching and juvenile mortality of M. incognita with an exposure period of 48 and 72h. On seed bacterization, with these five promising isolates, two isolates viz.EB4, BC1 significantly enhanced germination percentage (33.33, 25.31%) and vigour index (75.5, 64.39%) of paddy, receptively. The potential bacterial isolates viz., BC1 and EB4 were identified as Lysinibacillus sp. and Pseudomonas sp. , respectively , based on the morphological phenotypic and biochemical characterization. The pot culture experiment revealed that the bacterial endophytes viz., Lysinibacillus sp. (BC1) Pseudomonas sp. (EB4) significantly reduced the soil (61.64, 56.71%) and root nematode population (77.29, 68.87%), number of adult females (73.97, 69.89%), egg masses (85.63, 80.11%) and root-knot index (1.33, 1.67) of M. incognita compared to untreated control. The bacterial endophytes viz., Pseudomonas sp. (EB4), Lysinibacillus sp. (BC1) were also significantly increased the growth parameters viz., shoot length (43.33, 39.18%), and root length (78.24, 59.26%) and pesudostem girth (58.38, 52.13%).
Effect of calcium nitrate foliar spray on the calcium content, growth and freezing tolerance of Forsythia × Intermedia cultivars

Abstract In many northern regions frost hardiness of new cultivars of woody plants and perennials is fundamental for nursery production and the greenery industry. This study was conducted to determine the effect of calcium fertilization on frost resistance of Forsythia sp. cultivars. Plants were sprayed five times at four week intervals with calcium nitrate 1 g of (Ca(NO3)2). 100 ml H2O−1 per shrub. Shoots were frozen at three temperatures: –20, –25, and –30 °C. In all cases the chlorophyll content index in the leaves, and the calcium (Ca2+) content in leaves and stems of forsythia cultivars were significantly higher when calcium nitrate supplementation was provided. The Ca2+content in the roots was not affected. The freezing temperature had a great effect on the stem frost damage of tested forsythia cultivars. The greatest damage was observed after freezing at –30 °C. However, tissue damage of plants that were sprayed with calcium nitrate was considerably less evident, and cross sections of stems looked significantly better. At the lowest temperatures (–25 and –30 °C) a positive effect of calcium fertilization on lower electrolyte leakage was observed in all tested cultivars. Fertilization with finely ground calcium nitrate increased stem freezing tolerance of forsythia tested cultivars, especially new ones which have stems that are more susceptible to frost damage.
Regulatory roles of the cytochrome b6f complex in redox sensing and state transitions in Chlamydomonas reinhardtii : a structure-function study

Pour optimiser l’efficacite photosynthetique, les organismes de la lignee verte regulent la distribution de l’excitation lumineuse entre les deux photosystemes grace aux transitions d’etat. Par un mecanisme encore inconnu, le cytochrome (cyt) b6f detecte ces changements redox et transmet un signal d’activation a la kinase des transitions d’etat, Stt7. Afin de comprendre le role du cyt b6f, nous avons mis au point une strategie experimentale combinant la mutagenese aleatoire d’un gene chloroplastique par PCR error-prone, la transformation chloroplastique et la selection des clones sur leur croissance phototrophe. Les transformants ont ensuite ete cribles par imagerie de l’emission de fluorescence de la chlorophylle sur leur capacite a realiser des transitions d’etat. Plusieurs mutants de transitions d’etat ont ete ainsi isoles, et le sequencage a revele que les mutations impliquees etaient concentrees sur la boucle stromale fg de la sous-unite IV. La mutagenese dirigee de plusieurs residus cles de la boucle fg a montre que les substitutions des residus Asn122, Tyr124 et Arg215 generaient des mutants bloques a l’etat I independamment de l’etat redox du pool de quinones. Des experiences d’interaction proteine-proteine ont ensuite servi a prouver que le domaine kinase de Stt7 interagit avec la boucle fg de la sous-unite IV et que son activite d’autophosphorylation depend du residu Arg125. Nous proposons un modele de l’interaction entre ces deux proteines ainsi que du mecanisme d’activation de la kinase medie par le cyt b6f.
New Organosilicon Composite Based on Borosiloxane and Zinc Oxide Nanoparticles Inhibits Bacterial Growth, but Does Not Have a Toxic Effect on the Development of Animal Eukaryotic Cells

The present study a comprehensive analysis of the antibacterial properties of a composite material based on borosiloxane and zinc oxide nanoparticles (ZnO NPs). The effect of the polymer matrix and ZnO NPs on the generation of reactive oxygen species, hydroxyl radicals, and long-lived oxidized forms of biomolecules has been studied. All variants of the composites significantly inhibited the division of E. coli bacteria and caused them to detach from the substrate. It was revealed that the surfaces of a composite material based on borosiloxane and ZnO NPs do not inhibit the growth and division of mammalians cells. It is shown in the work that the positive effect of the incorporation of ZnO NPs into borosiloxane can reach 100% or more, provided that the viscoelastic properties of borosiloxane with nanoparticles are retained.
Willingness to Pay for Sustainable Coffee: A Case of Thai Consumers

The aim of this study is to investigate the willingness to pay (WTP) for sustainable coffee, and its determinants as well. Drawing an empirical survey with 500 consumers in Thailand, contingent valuation method was performed to elicit the WTP for sustainable coffee. A logistic model was adapted to evaluate the impacts of factors under Fishbein and Ajzen’s theory of reasoned action, that is, to test hypotheses of attitude and subjective norm, along with consumer characteristics on the WTP. Stata15 was adopted to analyze the cross-sectional data in logistic models; meanwhile probit regression was performed to confirm the results of the logistic model. The results indicate that attitude, self-brewing, marital status, past experience, job, and household income influence WTP. The WTP or premium price of sustainable coffee as compared to the conventional coffee is found to be 36.48%. Various stakeholders in coffee industry, for example, distributors, roasters, retailers and coffee farmers, as well as the policy makers, can act accordingly based upon the findings to develop a sustainable value-added coffee supply chain.
Fixed‐time extended state observer‐based trajectory tracking control for autonomous underwater vehicles

In this paper, we investigate the trajectory tracking control problem for autonomous underwater vehicles (AUVs) with time‐varying external disturbances of currents and waves in the sea. To solve the problem, a fixed‐time extended state observer (FTESO)‐based tracking controller is proposed. Firstly, by using the extended state observer, the FTESO is proposed for estimating the external disturbances and the velocities of the AUV within the fixed convergence time. Based on the FTESO, the fixed‐time controller is proposed for reducing the tracking errors and improving robustness performance. Theoretical analysis is given, which shows that the unknown external disturbances can be compensated and tracking error can converge to zero within the fixed time. Simulation results show that the proposed FTESO controller not only guarantees the fixed‐time convergence but also reduces the trajectory tracking errors of the AUV.
Propylphenol to Phenol and Propylene over Acidic Zeolites: Role of Shape Selectivity and Presence of Steam

This contribution studies the steam-assisted dealkylation of 4-n-propylphenol (4-n-PP), one of the major products derived from lignin, into phenol and propylene over several micro- and mesoporous acidic aluminosilicates in gas phase. A series of acidic zeolites with different topology (e.g., FER, TON, MFI, BEA, and FAU) are studied, of which ZSM-5 outperforms the others. The catalytic results, including zeolite topology and water stability effects, are rationalized in terms of thermodynamics and kinetics. A reaction mechanism is proposed by (i) analyzing products distribution under varying temperature and contact time conditions, (ii) investigating the dealkylation of different regio- and geometric isomers of propylphenol, and (iii) studying the reverse alkylation of phenol and propylene. The mechanism accords to the classic carbenium chemistry including isomerization, disproportionation, transalkylation, and dealkylation, as the most important reactions. The exceptional selectivity of ZSM-5 is attributed.
Increased Lipid Peroxidation May Be Linked to Ferritin Levels Elevation in Adult-Onset Still’s Disease

Lipid peroxidation (LPO) and hyper-ferritinemia are involved in inflammatory responses. Although hyper-ferritinemia is a characteristic of AOSD, its link to LPO remains unclear. We investigated the association between LPO and ferritin expression, and evaluated the relationship between LPO-related metabolites and inflammatory parameters. Mean fluorescence intensity (MFI) of LPO (C11-Biodipy581/591)-expressing PBMCs/monocytes in AOSD patients and healthy control (HC) subjects was determined by flow-cytometry analysis. Expression of ferritin and cytokines on PBMCs/macrophages was examined by immunoblotting. Plasma levels of LPO-related metabolites and cytokines were determined by ELISA and the MULTIPLEX platform, respectively. LPO MFI on PBMCs/monocytes were significantly higher in patients (median 4456 and 9091, respectively) compared with HC (1900, p < 0.05, and 4551, p < 0.01, respectively). Patients had higher ferritin expression on PBMCs (mean fold, 1.02) than HC (0.55, p < 0.05). Their ferritin expression levels on PBMCs stimulated with LPO inducers erastin or RSL3 (2.47 or 1.61, respectively) were higher than HC (0.84, p < 0.05, or 0.74, p < 0.01). Ferritin expression on erastin-treated/IL-1β-treated macrophages from patients were higher than those from HC (p < 0.001). The elevated levels of LPO-related metabolites, including malondialdehyde and 4-hydroxyalkenals, were positively correlated with disease activity scores, suggesting LPO involvement in AOSD pathogenesis. Increased ferritin expression on PBMCs/macrophages stimulated with LPO inducers indicates a link between LPO and elevated ferritin.
Effect of Cr Content on Corrosion Resistance of Low-Cr Alloy Steels Studied by Surface and Electrochemical Techniques

The electrochemical behavior of low alloyed Fe-Cr steels with 3 and 5% wt. of Cr in neutral Na2SO4 electrolyte combined with a detailed chemical and morphological characterization of these alloys performed by Auger electron spectroscopy, X-ray photoelectron spectroscopy, time-of-flight secondary ion mass spectrometry and scanning electron microscopy are presented here. The corrosion of low alloyed Fe-Cr steels proceeds in the prepassive range, with the formation of corrosion surface films having a duplex structure with outer iron oxide/hydroxide layer and inner Cr oxide-rich layer. The thickness, composition, and the morphology of the surface films vary as a function of chromium content in the alloy as well as conditions of electrochemical tests (temperature). Even a low chromium content shows a beneficial effect on the corrosion performances of the Fe-Cr steels. The chromium as a more active component than iron of ferrite increases the anodic activity of this phase, which results in a rapid saturation of the surface with the anodic reaction products forming a fine crystalline-like and compact layer of corrosion products. In this way, the chromium acts as a modifier of formation/crystallization of the iron-rich surface film (mainly magnetite) in the prepassive range.
Winning Conditions for the Adoption and Maintenance of Long-Term Healthy Lifestyles According to Physical Activity Students

The literature has not yet well documented the relative elements of the adoption of healthy lifestyle habits (HLHs) over the long term. More especially, researchers are calling to complete the corpus with qualitative or mixed estimates that would allow them to better explain the conditions necessary for the adoption or maintenance of HLHs over the long term. The present study seeks to understand the winning conditions for the adoption and maintenance of HLHs. Semi-structured group interviews were conducted with three groups of university students (two in Bachelor’s degree in physical education (PE) and one in Master’s degree in physical activity science), all in favor with HLHs. The results identify some dominant winning conditions in the adoption and maintenance of HLHs, such as the role of the family environment, the role of diversity and choice in physical activities during youth, the physical and social environment, autonomy and also mental health, which is closely linked with physical health. Results were modelled in the form of an ideal pathway, which traces the impact of winning conditions from childhood to adulthood. The originality of this study stands out, among other things, because of its innovative methodology; therefore, this study opens the door to future qualitative research in the field. Investigating pathways, considering the different phases of development of children and adolescents to identify factors of change and maintenance of HLHs now seems to be an interesting and necessary avenue for research in the field.