bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Unexpected 4,5‐Diphenyl‐2,7‐naphthyridine Derivative with Aggregation‐Induced Emission and Mechanofluorochromic Properties Obtained from a 3,5‐Diphenyl‐4H‐pyran Derivative
Authors: Xiao Fuming , Wang Mengzhu , Lei Yunxiang , Xie Yufeng , Liu Miaochang , Zhou Yunbing , Gao Wenxia , Huang Xiaobo , Wu Huayue 
Published: September 2020

AbstractFor a specific fluorescent molecule, the increase of molecular conformation distortion is beneficial to endow it with aggregation‐induced emission (AIE) and mechanofluorochromic (MFC) properties. Herein, 3,5‐diphenyl‐4H‐pyran derivative 5 and 4,5‐diphenyl‐2,7‐naphthidine derivative 7 with highly twisted conformations were synthesized. For compound 5, although the introduction of phenyl rings with large steric hindrance at 3 and 5 positions of the 4H‐pyran skeleton realized the transformation from aggregation‐induced quenching (ACQ)‐active molecule to AIE‐active molecule, it only showed a low‐contrast MFC activity. Compound 7 was accidentally obtained from compound 5 and n‐butylamine via a ring‐opening and subsequent intramolecular ring‐closing mechanism. Compound 7 was confirmed to have a highly twisted molecular conformation by the crystal structural analysis and exhibited AIE activity originated from the restriction of intramolecular rotation. Furthermore, compound 7 exhibited reversible high‐contrast MFC activity. Upon grinding, the change of solid‐state fluorescence color from orange to yellow was confirmed to be due to the partial destruction of crystal structure. This work provides new ideas for the design and synthesis of novel AIE‐active and MFC‐active fluorescent molecules based on ACQ‐active parent molecules.
Heterostructure and Oxygen Vacancies Promote NiFe2O4/Ni3S4 toward Oxygen Evolution Reaction and Zn‐Air Batteries
Authors: Fu Zhaoqin , Liu Shilong , Mai Zequn , Tang Zhenghua , Qin Dong‐Dong , Tian Yong , Wang Xiufang 
Published: September 2020

AbstractDeveloping high‐performance catalysts for oxygen evolution reaction (OER) is critical for the widespread applications of clean and sustainable energy through electrochemical devices such as zinc‐air batteries and (photo)electrochemical water splitting. Constructing heterostructure and oxygen vacancies have demonstrated great promises to boost the OER performance. Herein, we report a facile strategy to fabricate hetero‐structured NiFe2O4/Ni3S4 nanorods, where NiFe2O4 can be derived from Fe‐based metal‐organic frameworks (MOFs). The NiFe2O4/Ni3S4 catalyst exhibited excellent OER performance, evidenced by an overpotential value of 357 mV at the current density of 20 mA cm−2, and a small Tafel slope of 87.46 mV dec−1 in 1 M KOH, superior to the benchmark IrO2 catalyst. Moreover, NiFe2O4/Ni3S4 outperformed with regard to long‐term durability for OER than IrO2. Such outstanding OER performance is mainly accounted by the interface between NiFe2O4 and Ni3S4, and the presence of rich oxygen vacancies. When employed as air‐cathode in zinc‐air batteries, the NiFe2O4/Ni3S4 decorated battery had a high round‐trip efficiency of 62.1% at 10 h, and possessed long‐term stability of >50 h. This study may pave the way for fabricating non‐noble‐metal‐based cost‐effective, efficient and durable electrocatalysts for OER, zinc‐air batteries, and beyond.
Distributed containment control of fractional‐order multi‐agent systems using neural networks
Authors: Yuan Xiaolin , Mo Lipo , Yu Yongguang 
Published: September 2020

AbstractThis paper investigates the containment problem for fractional‐order multi‐agent systems (FOMASs) with unknown nonlinear functions over a directed communication topology. To solve this problem, the unknown functions are emulated by radial basis function neural networks. Then, we design novel distributed containment algorithms with adaptive control gainsand deduce some sufficient conditions. By taking the properties of the Mittag–Leffler function, the convergence analysis is finished. Finally, simulation examples show the effectiveness of the obtained theoretical results.
Exact controllability of linear mean‐field stochastic systems and observability inequality for mean‐field backward stochastic differential equations
Authors: Ye Wenjie , Yu Zhiyong 
Published: September 2020

AbstractThis paper is concerned with the exact controllability of linear mean‐field stochastic systems with time‐variant random coefficients. We prove that the exact controllability, the validity of the observability inequality for the dual equation, the unique solvability of a family of optimal control problems, the unique solvability of a family of mean‐field forward‐backward stochastic differential equations (MF‐FBSDEs), and the unique solvability of a family of norm optimal control problems are all equivalent. Therefore, some approaches are provided to investigate the issue of exact controllability.
A thermophilic chitinase 1602 from the marine bacterium Microbulbifer sp. BN3 and its high‐level expression in Pichia pastoris
Authors: Li Ren Kuan , Hu Ya Juan , He Yu Jie , Ng Tzi Bun , Zhou Zhi Min , Ye Xiu Yun 
Published: September 2020

AbstractChitinases play an important role in many industrial processes, including the preparation of oligosaccharides with potential applications. In the present study, a 1,713 bp gene of Chi1602, derived from a marine bacterium Microbulbifer sp. BN3, encoding a GH18 family chitinase, was expressed at high levels in Pichia pastoris. Distinct from most of the marine chitinases, the recombinant chitinase 1602 exhibited maximal activity at 60 °C and over a broad pH range between 5.0 and 9.0, and was stable at 50 °C and over the pH range 4.0–9.0. The hydrolytic products derived from colloidal chitins comprised mainly (GlcNAc)2 and GlcNAc, indicating that rChi1602 is a GH18 processive chitinase in conformity with its hypothetical structure. However, rChi1602 showed traces of β‐N‐acetylglucosaminidase activity on substrates such as powder chitin, chitosan, and ethylene glycol chitin. The thermophilic rChi1602, which manifests adaptation to a wide pH range and can be expressed at a high level in P. pastoris, is advantageous for applications in industrial processes.
Low‐cost and sustainable (nano)catalysts derived from bone waste: catalytic applications and biofuels production
Authors: Nasrollahzadeh Mahmoud , Soheili Bidgoli Nayyereh Sadat , Shafiei Nasrin , Soleimani Fahimeh , Nezafat Zahra , Luque Rafael 
Published: September 2020

AbstractThe application of (bio)wastes as alternatives to expensive existing catalysts is an approach that can be used to reduce environmental pollution problems. Animal bone wastes have attracted much attention as environmentally friendly heterogeneous catalysts for chemical transformations such as transesterification, oxidation, and biofuel production, owing to the substantial availability of valuable hydroxyapatite (HAp) in their structure. Most catalysts based on bone can be prepared easily by calcination. High‐temperature calcination yields highly active catalysts. Heterogeneous catalysts prepared from these renewable sources could also simply be reused and recovered without any important loss of catalytic performance. This paper reviews past efforts and recent progress on the development of different eco‐friendly catalysts derived from bone waste and some of their catalyzed chemical transformations. However, future challenges focus on crediting the conversion of unusable wastes to valuable sources to meet global requirements © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.
Seeing the subjective as objective: People perceive the taste of those they disagree with as biased and wrong
Authors: Cheek Nathan N. , Blackman Shane F. , Pronin Emily 
Published: September 2020

AbstractPeople think that they see things as they are in “objective reality,” and they impute bias and other negative qualities to those who disagree. Evidence for these tendencies initially emerged in the domain of politics, where people tend to assume that there are objectively correct beliefs and positions. The present research shows that people are confident in the correctness of their views, and they negatively judge those who disagree, even in the seemingly “subjective” domain of art. Across seven experiments, participants evaluated paintings and encountered others who agreed or disagreed with their evaluations. Participants saw others' evaluations as less objective when they clashed with their own, and as more influenced by biasing factors like conformity or financial incentives. These aesthetic preferences felt as objective as political preferences. Reminding people of their belief that artistic preferences are “matters of opinion” reduced this thinking, but did not eliminate it. These findings suggest that people's convictions of their own objectivity are so powerful as to extend to domains that are typically regarded as “subjective.”
Approximate maximum likelihood estimation for logistic regression with covariate measurement error
Authors: Cao Zhiqiang , Wong Man Yu 
Published: September 2020

AbstractIn nutritional epidemiology, dietary intake assessed with a food frequency questionnaire is prone to measurement error. Ignoring the measurement error in covariates causes estimates to be biased and leads to a loss of power. In this paper, we consider an additive error model according to the characteristics of the European Prospective Investigation into Cancer and Nutrition (EPIC)‐InterAct Study data, and derive an approximate maximum likelihood estimation (AMLE) for covariates with measurement error under logistic regression. This method can be regarded as an adjusted version of regression calibration and can provide an approximate consistent estimator. Asymptotic normality of this estimator is established under regularity conditions, and simulation studies are conducted to empirically examine the finite sample performance of the proposed method. We apply AMLE to deal with measurement errors in some interested nutrients of the EPIC‐InterAct Study under a sensitivity analysis framework.
Gating and regulation of the calcium release‐activated calcium channel: Recent progress from experiments and molecular modeling
Authors: Huo Jun , Dong Hao 
Published: September 2020

AbstractCalcium release‐activated calcium (CRAC) channels are highly calcium ion (Ca2+)‐selective channels in the plasma membrane. The transient drop of endoplasmic reticulum Ca2+ level activates its calcium sensor stromal interaction molecule (STIM) and then triggers the gating of the CRAC channel pore unit Orai. This process involves a variety of activities of the immune system. Therefore, understanding how the activation and regulation of the CRAC channel can be accomplished is essential. Here we briefly summarize the recent progress on Orai gating and its regulation by 2‐aminoethoxydiphenylborate (2‐APB) obtained from structural biology studies, biochemical and electrophysiological measurements, as well as molecular modeling. Indeed, integration between experiments and computations has further deepened our understanding of the channel gating and regulation.
Gaining momentum: Towards integrated reporting practices in Gulf Cooperation Council countries
Authors: Ahmed Ahmed H. , Elmaghrabi Mohamed E. , Dunne Theresa , Hussainey Khaled 
Published: September 2020

AbstractPurposeThe study focuses on all nonfinancial companies representing four Gulf countries namely: Saudi Arabia, Kuwait, UAE and Qatar. It provides a comparative analysis of the extent of Integrated Reporting practices amongst 217 listed companies in 2013 and 2014.Design/methodology/approachThe sample comprises all nonfinancial companies listed on the respective stock markets. An integrated reporting index comprising 43 items was developed based on a review of the extant literature and the IIRC framework. A descriptive analysis follows which explores the extent of integrated reporting amongst the sample companies.FindingsThe results indicate that the Integrated Reporting is still in an embryonic stage with companies listed on the UAE and Saudi Arabia stock exchanges taking the lead. The results show great variation amongst the surveyed companies which could reflect the voluntary nature of IR practices and the absence of a universally‐recognised framework that guides such practices, resulting in companies having discretion in terms of the nature and extent of their IR practices.Practical ImplicationsThis paper provides evidence from the Gulf region with respect to the extent of integrated reporting practiced there, as the majority of prior studies focus on countries with developed capital markets. The results presented in this paper should therefore be of interest to regulators and standard‐setters charged with developing accounting standards related to integrated reporting.Originality/valueTo the best of the authors' knowledge this is the first study to investigate IR practices in the Middle East and North Africa region, so it could be regarded as an important step in understanding how this area of research is moving forward in developing countries context and should provide a springboard for future research in this area.
Shareholders' environmental profile and its impact on firm's environmental proactivity: An institutional approach
Authors: Bueno‐Garcia Manuel , Ortiz‐Perez Alejandro , Mellado‐Garcia Elena 
Published: September 2020

AbstractTheorists and practitioners still argue about different shareholders' environmental preferences. Drawing on various processes of institutional theory such as deinstitutionalization and defensive institutionalism, we test the differences between foreign and national shareholders' influences on firms' environmental proactivity. Specifically, we focus on the country of origin of the dominant shareholders and the environmental culture of the countries of origin of the shareholders. Using unbalanced panel data from between 2006 and 2017, which includes 12,527 observations of 1532 different firms from 11 economic sectors and across 23 countries, our results show that foreign shareholders are more prone to modifying existing environmental practices, whereas national shareholders may accept them, despite being reluctant to implement such changes. We make a contribution by showing that the deinstitutionalization forces coming from foreign shareholders are stronger than the defensive institutionalism efforts of national shareholders. However, such forces are not always the best options for sustainability.
Seasonal variation in U.S. hospitalizations for chronic limb‐threatening ischemia
Authors: Altin S. Elissa , Kim Yeunjung G. , Aronow Herbert D. , Armstrong Ehrin J. , Goldsweig Andrew M. , Dardik Alan , Lanksy Alexandra J. , Mena‐Hurtado Carlos I. , Abbott J. Dawn 
Published: September 2020

AbstractBackgroundSeasonal variation in coronary artery disease is well described, with a peak in the winter and a trough in the summer. However, little is known about seasonal trends in hospital admission for critical limb‐threatening ischemia (CLTI) and associated outcomes.MethodsPatients admitted with CLTI from January 1, 2012 through August 31, 2015 were identified in the Healthcare Cost and Utilization Project's National Inpatient Sample based upon administrative claims diagnosis codes. The primary outcome was seasonal hospitalization incidence, and secondary outcomes included mortality rates and rates of in‐hospital major and minor amputations among nondiabetics and diabetics.ResultsOf 1,276,745 hospitalizations for CLTI during the study period, 28.3% occurred in the spring, the peak admission season, and 19.1% occurred in the fall, the nadir. In‐hospital mortality was highest during the winter (adjusted odds ratio [OR]: 1.08; 95% confidence interval [CI]: 1.03–1.14), and followed the highest seasonal rates of influenza in the fall; however, other important comorbidities did not differ significantly by season. For the overall cohort, there was no significant seasonal variation in rates of major or minor amputation, although seasonal rates were different according to diabetic status. Patients without diabetes had the highest odds of amputation in the spring (OR 1.07; 95% CI: 1.02–1.12), although this trend was not identified among patients with diabetes.ConclusionsThere is significant seasonal variability in CLTI admissions and mortality but minimal variability in amputation rates. Understanding the seasonal variation in CLTI may help to identify individuals at greatest risk for hospitalization and death through patient and provider education efforts.
Effect of agronomic management on rice grain quality Part I: A review of Australian practices
Authors: Wood Rachael Maree , Waters Daniel L. E. , Mawson Andrew John , Blanchard Christopher L. , Dunn Brian W. , Oli Prakash 
Published: September 2020

AbstractCrop yield dominates rice (Oryza sativa L.) industry research; however, it is grain quality that dictates the value and market acceptance of rice. Key parameters of rice grain quality include physical appearance, amenability to processing and the cooking and sensory properties. In Australia, rice farmers who do not meet defined high‐quality standards receive discounts to their payments. Consequently, even with high yields, poor grain quality can negatively impact grower returns. Despite the financial consequences, the quality of Australian grown rice is highly variable, because unfortunately, the underlying causes are poorly understood. The identification of genetic markers for specific traits largely dominates rice grain quality research, while research regarding the effect of crop management practices on grain quality is relatively sparse and generally lacks an Australian focus. Prior research that has assessed the effect of crop management practices on grain quality tends to focus primarily on milling quality and neglect the physicochemical and cooking properties. This review outlines the current state of knowledge of the role nutritional management, irrigation protocols, planting density, and the interaction with genotype and environment on rice grain quality. The review highlights the uniqueness of Australian management practices and that there is a need for future research to understand the impact of agronomic practices on rice grain quality in Australia. Understanding how each cultivar interacts with agronomic practices can help reduce the variability found within rice crops.
Facial nerve paralysis caused by a T‐cell lymphoma
Authors: Nachtsheim Lisa , Wittersheim Maike , Kreissl Stefanie , Klussmann Jens Peter , Grosheva Maria 
Published: September 2020

Key Clinical MessageFacial nerve paralysis due to the infiltration by a lymphoma is rare and the prognosis remains poor. If perineural spread and meningeosis are suspected, quick interdisciplinary diagnostic work‐up is recommended. It should include magnetic resonance imaging, biopsy of the lesion, bone marrow biopsy, and lumbar puncture. Therapy should be initiated immediately.
Envelopes: A new chapter in partial least squares regression
Authors: Cook R. Dennis , Forzani Liliana 
Published: September 2020

AbstractWe describe and elaborate on foundations that connect partial least squares regression with recently developed envelope theory and methodology. These foundations explain why PLS regression can work well in high‐dimensional regressions where the number of predictors exceeds the number of observations and set it apart from other predictive methodologies. We hope that our foundational perspective will stimulate cross‐fertilization between statistics and chemometrics, leading eventually to important methodological advancements.
Preparative separation of nebivolol isomers by improved throughput reverse phase tandem two column chromatography
Authors: Ingle Umesh , Lali Arvind 
Published: September 2020

AbstractDevelopment of preparative methods for the isolation of chiral molecules has been considered challenging by conventional unit operations due to their identical physical and chemical properties. This has evolved chiral stationary phases for the separation of chiral components using chromatography technique. However, separation method using chiral adsorbents requires high pressure, are expensive, and have low productivity. Generation of bulk quantities purified nebivolols using the available high pressure chiral separation methods is impractical and operating cost‐intensive. Thus, there is a need to develop economical methods using nonchiral adsorbents for the purification of nebivolols or similar active ingredients. The present work demonstrates a unique and scalable tandem two‐column method for the separation of isomers of nebivolol using inexpensive reverse phase adsorbents. The first column of the scheme causes removal of charged and nonisomeric impurities whereas tandem operation of second column increases resolution of d‐nebivolol and l‐nebivolol. The maximization of separation due to tandem operation of second column causes enhancement of the throughput of the process. The developed preparative process produces >98% purity of both d‐nebivolol and l‐nebivolol with overall loading capacity of 56 g (L of adsorbent)−1 and productivity of 20 g L−1 day−1.
The Real Structure of Pd(OAc)2 in Various Solvents†
Authors: Zhang Dongchao , Yang Dali , Wang Shengchun , Zeng Li , Xin Jie , Zhang Heng , Lei Aiwen 
Published: September 2020

Main observation and conclusionPd(OAc)2 is an extensively utilized palladium source in the palladium initiated transformations either directly or as a catalyst precursor. However, the comprehension of the real structure of Pd(OAc)2 in solution is still vague. In this work, the structure of palladium acetate in solution was studied in detail by using X‐ray absorption fine structure (XAFS) spectroscopy. The results demonstrate that monomer is the main form for Pd(OAc)2 in the solution of 1,4‐dioxane, N,N‐dimethylacetamide (DMA), N,N‐dimethylformamide (DMF), 1,2‐dimethoxyethane (DME), MeCN and dimethyl sulfoxide (DMSO). In addition, Pd(II) could be reduced to Pd(0) in ethanol solution. The structural information in this research will benefit the understanding of the mechanism of Pd(OAc)2 involved organic reactions.
A negative T‐wave in electrocardiogram at 50 years predicted lifetime mortality in a random population‐based cohort
Authors: Sjöland Helen , Fu Michael , Caidahl Kenneth , Hansson Per‐Olof 
Published: September 2020

AbstractBackgroundSevere electrocardiographic (ECG) abnormalities in asymptomatic subjects correlate with cardiovascular risk.HypothesisThe role of minor ECG abnormalities is less well‐known. We evaluated the association between a negative T‐wave and mortality, as a possible marker for prognosis.MethodsA prospective, population‐based cohort, examined at 50 years, and followed until death. Time to death (event rates) and predictive role of a negative T‐wave (Cox regression) were analyzed.ResultsParticipants (n = 839) with a negative T‐wave (7.3%) had significantly higher blood pressure (BP) (mean systolic 157.9 mmHg vs 136.8 mmHg without negative T‐wave, P = <.0001). A negative T‐wave correlated with elevated risk (hazard ratio [HR] [95% CI] [confidence interval]) for all‐cause and cardiovascular (CV) death (1.59 (1.20‐2.11) P = .0012 vs 1.91 (1.34‐2.73) P = .0004). The association remained after excluding coexisting Q/QS patterns and ST‐junction/segment depression ECG abnormalities (1.66 [1.13‐2.44] P = .0098 for all‐cause vs 1.87 [1.13‐3.09] P = .015 for CV death). Death from other causes was not associated with a negative T‐wave. A major negative T‐wave carried higher risk than a minor (2.17 [1.25‐3.76] P = .0062 vs 1.78 [1.13‐2.79] P = .012) for CV death.ConclusionA negative T‐wave at 50 years, in asymptomatic individuals, carried an increased risk of all‐cause and CV death during lifetime follow‐up.