bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of Molybdenum Disulfide as a Negative Electrode Additive for Stationary Flooded Lead Acid Batteries with Tubular Positive Plates
Authors: Arun S. , Arul C. , Mithin Kumar S. , Venkat Kiran Uday , Mayavan Sundar 
Published: February 2020

AbstractTwo dimensional layered molybdenum disulfide (MoS2) nanosheets possess great potential for lithium‐ion batteries, but their role in lead‐acid batteries (LAB) is not well known and documented. In this work, for the first time, full scale tubular positive flooded lead‐acid battery containing MoS2 in negative electrode was compared to control battery containing only carbon black for stationary/float application. Discharge capacity and an endurance test for 2000 h under constant current charging regime were investigated as per the Indian standard for testing stationary LAB (with tubular positive plate) in monobloc container (IS 13369 : 1992, reaffirmed in 2017). Inclusion of MoS2 does not negatively impact discharge capacity or endurance performance; instead, it improves these parameters 2–5 % over control battery. A significant drop in charging voltage is observed in the battery containing MoS2 throughout 2000 h of endurance testing. A battery containing MoS2 passes a similar current of 15 A at 15.2 V as control battery at 15.8 V. Battery containing MoS2, therefore, could be recharged at lower voltages than control batteries to reach identical Ah, thus delaying the onset of common failure mechanism, i. e., grid corrosion associated with high charging voltages.
Oxygen Defects in Promoting the Electrochemical Performance of Metal Oxides for Supercapacitors: Recent Advances and Challenges
Authors: Zhang Xiyue , Liu Xiaoqing , Zeng Yinxiang , Tong Yexiang , Lu Xihong 
Published: February 2020

AbstractMetal oxides (MOs) with multiple active sites are regarded as one of the most potential active materials for high‐performance supercapacitor (SC) constructions. Engineering oxygen vacancies into MOs can effectively modulate their electronic properties, subtly induce impurity states in their bandgaps, and considerably optimize their electrical conductivity. Benefiting from these advantageous properties, the resultant oxygen‐defective electrodes generally embed more electrochemical active sites and present better charge storage capability in contrast to the pristine sample. Particular research attention has been given to the realization of precise oxygen vacancy introduction into MOs and the fine tuning of their properties. This review presents an overview of recent accomplishments in developing new oxygen‐defective MOs for advanced SC assembly. Different strategies for oxygen vacancy productions are summarized and compared. The specific roles of oxygen vacancies in the electrochemical performance enhancement are fully addressed and the relevant impact factors are discussed in detail. Finally, the key challenges and future opportunities in this rapidly developing field are highlighted.
Efficient CO2 Reduction to HCOOH with High Selectivity and Energy Efficiency over Bi/rGO Catalyst
Authors: Duan Yan‐Xin , Liu Kai‐Hua , Zhang Qi , Yan Jun‐Min , Jiang Qing 
Published: February 2020

AbstractThe electroreduction of carbon dioxide (CO2) to value‐added fuels is of great significance to meet the ever‐increasing energy and environmental challenges. So far, desirable selectivity and Faradaic efficiency for CO2 reduction can be obtained over most electrocatalysts. However, improving cathodic energy efficiency is still neglected in research. Herein, a facile reduction method is first presented to synthesize the ultrafine non‐noble bismuth (Bi) nanoparticles anchored on rGO (Bi/rGO). As expected, the Bi/rGO catalyst exhibits excellent electrochemical performance on CO2 reduction to form formic acid (HCOOH), with very high Faradaic efficiency (up to 98%), favorable stability (over 12 h), and especially outstanding cathodic energy efficiency (up to 71%). Further, density functional theory (DFT) calculations are performed to investigate the possible reaction mechanism for reduction of CO2 to HCOOH.
Studying method of underivatized determination glyphosate, glufosinate and their metabolites in drinking water
Authors: Giang Le Truong , Thien Tran Lam Thanh , Yen Dao Hai 
Published: February 2020

AbstractIn Vietnam, glyphosate, one of the most popular herbicides, has recently been prohibited in agriculture due to indiscriminate use and its negative effect on the environment and human's health. Direct analysis and determination glyphosate, glufosinate and their metabolites in environmental samples such as water has get in numerous difficulties due to their simple structure, high polarity and complex formation with different components in the matrices. Therefore, in this research study, we have initially developed a method using ultra‐high performance liquid chromatography (UPLC) coupled with high resolution mass spectrometry with Q‐Orbitrap mass analyzer to analyze anionic compounds such as glyphosate, glufosinate and their metabolites. The use of this system provides low limit of detection (LOD) and quantification (LOQ) of method were 0.003 mg/kg and 0.015 mg/kg, respectively. With respect of sample treatment, we combined C18 and MAX materials in order to obtain the most effective clean up section and high recovery varying from 70 to 120 %.
The effect of nano‐silver on the properties of epoxidized rubber seed oil composite
Authors: Thuy Nguyen Thi , Van Trung Nguyen , Tuan Pham Anh , Duc Vu Minh 
Published: February 2020

AbstractThe Unidrive X1000 CAT mixer was used to disperse nano‐silver into matrix resin. The field emission scanning electron micrograph showed the flock of nano‐silver has burst into smaller clusters and dispersed evenly in epoxidized rubber seed oil. Two bacterial strains: gram‐positive bacterial (S. aureus) and gram‐negative bacterial (E. coli) were used to evaluate the antibacterial property of sample. The results showed matrix resin without nano‐silver possessed antibacterial property with both strains. The presence of nano‐silver raised the gram‐positive antibacterial property but reduced gram‐negative antibacterial property of matrix resin. The viscosity of matrix resin containing different nano‐silver contents was unchanged except 100 ppm. Moreover, the presence of nano‐silver has prolonged the and curing time but increased maximum exothermal temperature of emission. In general, the presence of nano‐silver improved strongly in mechanical properties of composite especially nano‐silver content of 20 to 60 ppm.
Preparation of magnetic nanocomposite with modified polyguanidine and its antibacterial properties
Authors: Lan Pham Thi , Mai Phan Thi Tuyet , Minh Vu Xuan , Hanh Le Thi My , Van Bien Tran , Thao Do Thi , Dung Nguyen Tuan 
Published: February 2020

AbstractGuanidine‐based polymers are well‐known strong antimicrobial agents against a wide range of microorganisms. However, the high water solubility restricted their potential applications in the field of water treatment. In this study, polyguanidine (PG) has been modified with epichlorohydrin (Ep) and then used for synthesis of nanocomposite with Fe3O4 nanoparticles. The intrinsic viscosity measurements of modified product showed clearly that the viscosity increased with the increasing of Ep content. The characterization results indicated that magnetite Fe3O4/PG‐Ep nanocomposites were successfully synthesized, with 20‐30 nm particle size and high saturation magnetization, 62 emu.g‐1. The TGA results showed that PG‐Ep amount containing in the nanocomposite was about 10 % (wt.). As‐prepared nanocomposite Fe3O4/PG‐Ep demonstrated good antibacterial activity against Escherichia coli and had the potential to be used in disinfection applications.
Localization elements and zip codes in the intracellular transport and localization of messenger RNAs in Saccharomyces cerevisiae
Authors: Chaudhuri Anusha , Das Subhadeep , Das Biswadip 
Published: February 2020

AbstractIntracellular trafficking and localization of mRNAs provide a mechanism of regulation of expression of genes with excellent spatial control. mRNA localization followed by localized translation appears to be a mechanism of targeted protein sorting to a specific cell‐compartment, which is linked to the establishment of cell polarity, cell asymmetry, embryonic axis determination, and neuronal plasticity in metazoans. However, the complexity of the mechanism and the components of mRNA localization in higher organisms prompted the use of the unicellular organism Saccharomyces cerevisiae as a simplified model organism to study this vital process. Current knowledge indicates that a variety of mRNAs are asymmetrically and selectively localized to the tip of the bud of the daughter cells, to the vicinity of endoplasmic reticulum, mitochondria, and nucleus in this organism, which are connected to diverse cellular processes. Interestingly, specific cis‐acting RNA localization elements (LEs) or RNA zip codes play a crucial role in the localization and trafficking of these localized mRNAs by providing critical binding sites for the specific RNA‐binding proteins (RBPs). In this review, we present a comprehensive account of mRNA localization in S. cerevisiae, various types of localization elements influencing the mRNA localization, and the RBPs, which bind to these LEs to implement a number of vital physiological processes. Finally, we emphasize the significance of this process by highlighting their connection to several neuropathological disorders and cancers.This article is categorized under:
RNA Export and Localization > RNA Localization
Educating for Environmental Citizenship in Non-formal Frameworks for Secondary Level Youth
Authors: Paraskeva-Hadjichambi Demetra , Goldman Daphne , Hadjichambis Andreas Ch. , Parra Gema , Lapin Katharina , Knippels Marie-Christine , Van Dam Frans 
Published: February 2020

AbstractNon-formal education is an integral component to lifelong learning and its aim is for young people and adults to acquire and maintain the skills and competencies necessary to adapt to a continuously changing environment. Non-formal education implements different learning activities and is supplementary to formal education, taking place outside, but supplementary, to the formal educational system. From the conception and throughout the ongoing evolution of environmental education, non-formal education has been identified as an important framework for conducting Environmental Education and Education for Sustainability. Therefore, non-formal settings for secondary education level can contribute to Education for Environmental Citizenship by providing the opportunity and conditions that enable young people to acquire the body of knowledge as well as the skills, values, attitudes and pro-environmental actions necessary to become an Environmental Citizen. In addition, an Environmental Citizen is empowered and motivated to participate in society as an agent-of-change in the direction of solving contemporary environmental problems, preventing the creation of new ones, and achieving sustainability and restoring our (human) relationships with nature. Pedagogies including place-based education, civic ecology education, ecojustice pedagogy, action competence and socio-scientific inquiry-based learning can contribute to building students’ competencies for the deep civic participation necessary to realise environmental and social change. However, due to the novelty of the concept, the lack of a complete pedagogical framework for Education in Environmental Citizenship in non-formal settings presents a major challenge.
Environmental Citizenship and Youth Activism
Authors: Reis Pedro 
Published: February 2020

AbstractA citizen’s capacity to act in society as an agent of change is an important element of Environmental Citizenship. This chapter discusses the concept of activism and the importance of activism initiatives in the development of citizens’ willingness and competences for critical, active and democratic engagement in preventing and solving environmental problems. Several possible ways for young people to get involved in environmental activism are presented. Also discussed is the possible and desirable combination of youth activism with citizen science, as a catalyst for empowering future citizens with the willingness and the higher-level abilities for participating in the global effort for a sustainable development and assuming the responsibility for future generations. Youth activism represents a key element in Education for Environmental Citizenship, allowing students to exercise their environmental rights and duties and to develop the knowledge, skills, values and attitudes that empower them as problem-solvers capable of facing the contemporary environmental problems.
Higgs vacuum (in)stability during inflation. The dangerous relevance of de Sitter departure and Planck-suppressed operators
Authors: Fumagalli Jacopo , Renaux-Petel Sébastien , Ronayne John W. 
Published: February 2020

Abstract
The measured Standard Model parameters lie in a range such that the Higgs potential, once extrapolated up to high scales, develops a minimum of negative energy density. This has important cosmological implications. In particular, during inflation, quantum fluctuations could have pushed the Higgs field beyond its potential barrier, triggering the formation of anti-de Sitter regions, with fatal consequences for our universe. By requiring that this did not happen, one can in principle connect (and constrain) Standard Model parameters with the energy scale of inflation. In this context, we highlight the sensitivity of the fate of our vacuum to seemingly irrelevant physics. In particular, the departure of inflation from an exact de Sitter phase, as well as Planck-suppressed derivative operators, can, already and surprisingly, play a decisive role in (de)stabilizing the Higgs during inflation. Furthermore, in the stochastic dynamics, we quantify the impact of the amplitude of the noise differing from the one of a massless field, as well as of going beyond the slow-roll approximation by using a phase-space approach. On a general ground, our analysis shows that relating the period of inflation to precision particle physics requires a knowledge of these “irrelevant” effects.
Natural neutrino sector in a 331-model with Froggatt-Nielsen mechanism
Authors: Huitu Katri , Koivunen Niko , Kärkkäinen Timo J. 
Published: February 2020

Abstract
The extensions of the Standard Model based on the SU(3)c × SU(3)L × U(1)X gauge group (331-models) have been advocated to explain the number of fermion families in nature. It has been recently shown that the Froggatt-Nielsen mechanism, a popular way to explain the mass hierarchy of the charged fermions, can be incorporated into the 331-setting in an economical fashion (FN331). In this work we extend the FN331-model to include three right-handed neutrino singlets. We show that the seesaw mechanism is realized in this model. The scale of the seesaw mechanism is near the SU(3)L × U(1)X-breaking scale. The model we present here simultaneously explains the mass hierarchy of all the fermions, including neutrinos, and the number of families.
Demailly’s notion of algebraic hyperbolicity: geometricity, boundedness, moduli of maps
Authors: Javanpeykar Ariyan , Kamenova Ljudmila 
Published: February 2020

AbstractDemailly’s conjecture, which is a consequence of the Green–Griffiths–Lang conjecture on varieties of general type, states that an algebraically hyperbolic complex projective variety is Kobayashi hyperbolic. Our aim is to provide evidence for Demailly’s conjecture by verifying several predictions it makes. We first define what an algebraically hyperbolic projective variety is, extending Demailly’s definition to (not necessarily smooth) projective varieties over an arbitrary algebraically closed field of characteristic zero, and we prove that this property is stable under extensions of algebraically closed fields. Furthermore, we show that the set of (not necessarily surjective) morphisms from a projective variety Y to a projective algebraically hyperbolic variety X that map a fixed closed subvariety of Y onto a fixed closed subvariety of X is finite. As an application, we obtain that $${{\,\mathrm{Aut}\,}}(X)$$

Aut

(
X
)

is finite and that every surjective endomorphism of X is an automorphism. Finally, we explore “weaker” notions of hyperbolicity related to boundedness of moduli spaces of maps, and verify similar predictions made by the Green–Griffiths–Lang conjecture on hyperbolic projective varieties.
A duality for Guichard nets
Authors: Szewieczek Gudrun 
Published: February 2020

AbstractIn this paper we study G-surfaces, a rather unknown surface class originally defined by Calapso, and show that the coordinate surfaces of a Guichard net are G-surfaces. Based on this observation, we present distinguished Combescure transformations that provide a duality for Guichard nets. Another class of special Combescure transformations is then used to construct a Bäcklund-type transformation for Guichard nets. In this realm a permutability theorem for the dual systems is proven.
The clinicopathological significance of the adipophilin and fatty acid synthase expression in salivary duct carcinoma
Authors: Hirai Hideaki , Tada Yuichiro , Nakaguro Masato , Kawakita Daisuke , Sato Yukiko , Shimura Tomotaka , Tsukahara Kiyoaki , Kano Satoshi , Ozawa Hiroyuki , Okami Kenji , Sato Yuichiro , Fushimi Chihiro , Shimizu Akira , Okamoto Isaku , Takase Soichiro , Okada Takuro , Sato Hiroki , Imanishi Yorihisa , Otsuka Kuninori , Watanabe Yoshihiro , Sakai Akihiro , Ebisumoto Koji , Togashi Takafumi , Ueki Yushi , Ota Hisayuki , Saigusa Natsuki , Takahashi Hideaki , Ando Mizuo , Urano Makoto , Hanazawa Toyoyuki , Nagao Toshitaka 
Published: February 2020

AbstractSalivary duct carcinoma (SDC) is an aggressive, uncommon tumor histologically comparable to high-grade mammary ductal carcinoma. SDCs are usually androgen receptor (AR)–positive and often HER2-positive. Recently, therapies targeting these molecules for SDC have attracted attention. Lipid metabolism changes have been described in association with biological behavior in various cancers, although no such relationship has yet been reported for SDC. We therefore analyzed the clinicopathological relevance of the immunohistochemical expression of adipophilin (ADP) and fatty acid synthase (FASN), representative lipid metabolism–related proteins, in 147 SDCs. ADP and FASN were variably immunoreactive in most SDCs (both 99.3%), and the ADP and FASN expression was negatively correlated (P = 0.014). ADP-positive (≥ 5%) SDCs more frequently exhibited a prominent nuclear pleomorphism and high-Ki-67 labeling index than those ADP-negative (P = 0.013 and 0.011, respectively). In contrast, a high FASN score, calculated by the staining proportion and intensity, (≥ 120) was correlated with the high expression of AR and FOXA1 (P < 0.001 and = 0.003, respectively). The ADP and FASN expression differed significantly among the subtypes based on biomarker immunoprofiling, as assessed by the AR, HER2, and Ki-67 status (P = 0.017 and 0.003, respectively). A multivariate analysis showed that ADP-positive expression was associated with a shorter overall and progression-free survival (P = 0.018 and 0.003, respectively). ADP was associated with an aggressive histopathology and unfavorable prognosis, and FASN may biologically interact with the AR signaling pathway in SDC. ADP may, therefore, be a new prognostic indicator and therapeutic target in SDC.
Gas well integrity and methane migration: evaluation of published evidence during shale-gas development in the USA
Authors: Hammond Patrick A. , Wen Tao , Brantley Susan L. , Engelder Terry 
Published: February 2020

AbstractMore than 1 million wells may have been completed using hydraulic fracturing techniques in the USA alone; however, there have been few case studies exploring the impacts on water resources due to methane migration. This study evaluated the results of three investigations initiated by the US Environmental Protection Agency, that were subsequently described in published studies at Dimock in Pennsylvania, Parker-Hood County in Texas, and Pavillion in Wyoming, as well as another study completed at Sugar Run in northeast Pennsylvania. In addition, earlier investigations at Shaws Corner in Pennsylvania, Jackson County in West Virginia, Garfield County in Colorado, and Bainbridge in Ohio are summarized. The most common cause of incidents was the presence of uncemented sections of production casings in wells that allowed gas migration from intermediate depths to shallow freshwater aquifers. In three cases, an inadequate depth of the primary top of cement (TOC) also contributed to impacts. Sources of methane were best identified through analyses of isotopes on samples from production casings, annular spaces, and water wells. In Dimock, some isotope signatures changed with time, after the completion of remedial actions. In Parker-Hood County, where impacts were not related to gas well activity, noble gas analyses were also needed to determine the source of gas. At Pavillion, where maximum methane concentrations in water wells were <1 mg/L, no significant impacts were documented. For all the sites, most or all of the fugitive gas incidents may have been prevented by fully cementing production casings to the land surface.
Gap Functions and Error Bounds for Variational–Hemivariational Inequalities
Authors: Hung Nguyen Van , Migórski Stanislaw , Tam Vo Minh , Zeng Shengda 
Published: February 2020

AbstractIn this paper we investigate the gap functions and regularized gap functions for a class of variational–hemivariational inequalities of elliptic type. First, based on regularized gap functions introduced by Yamashita and Fukushima, we establish some regularized gap functions for the variational–hemivariational inequalities. Then, the global error bounds for such inequalities in terms of regularized gap functions are derived by using the properties of the Clarke generalized gradient. Finally, an application to a stationary nonsmooth semipermeability problem is given to illustrate our main results.
From Letter to Twitter: A Systematic Review of Communication Media in Negotiation
Authors: Geiger Ingmar 
Published: February 2020

AbstractWith the advent of modern communication media over the last decades, such as email, video conferencing, or instant messaging, a plethora of research has emerged that analyzes the association between communication media and negotiation processes and outcomes. In this paper, the author systematically reviews theoretical vantage points on communication media and negotiation and summarizes empirical findings from the last six decades. Specifically, the author focuses on three different strategic communication theories and four social psychological theoretical perspectives that found traction in negotiation research. Subsequently, empirical evidence on communication media and negotiation is presented, derived from an extensive literature search of relevant peer-reviewed articles. The author analyzes effects of communication media on the negotiation process (descriptive process parameters, economic reference points, negotiation behavior/tactics, individual perceptual and affective process variables) as well as economic (agreement, individual profit, joint profit, dispersion of profits) and socio-emotional (satisfaction, trust, socio-emotional evaluation of the self and the opponent) outcomes. The discussion takes stock of the current state of research and persisting research gaps, before focusing on some recent developments, and proposing future research avenues.