bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis of Cu(II) complexes by N,O‐donor ligand transformation and their catalytic role in visible‐light‐driven alcohol oxidation
Authors: Ranjan Rishi , Kundu Bidyut Kumar , Kyarikwal Reena , Ganguly Rakesh , Mukhopadhyay Suman 
Published: October 2021

AbstractVisible‐light‐driven photoreactions using metal complexes as catalysts are currently a research hotspot in terms of the development of environmentally friendly sustainable processes. To develop potential copper‐based photocatalysts, a Mannich base ligand, namely, 2,4‐dichloro‐6‐((4‐(2‐hydroxyethyl)piperazin‐1‐yl)methyl)phenol (H2L), has been synthesized and characterized. Two copper complexes [Cu (HL1)] (1) and [Cu (HL2)] (2) have been obtained from H2L, where the ligand undergoes an unprecedented transformation plausibly via oxidation of piperazine ring to ketone, subsequent oxidation of enol and nucleophilic attack of methanol followed by hydrolysis of amide bond, resulting piperazine ring cleavage. Under the irradiation of visible light, these catalysts can oxidize primary alcohols into corresponding aldehydes with very good conversion and high selectivity in the presence of molecular oxygen. The photocatalysts could be recovered almost quantitatively after completion of the catalytic cycle and recycled at least four times without much depreciation of catalytic activity. A plausible mechanistic pathway for alcohol oxidation has been explored through electrospray ionization mass spectrometry (ESI‐MS) spectrometric, cyclic voltammetry, UV–vis, and computational study.
Stimuli‐responsive polymeric additives for anticorrosion
Authors: Auepattana‐Aumrung Krisada , Phakkeeree Treethip , Crespy Daniel 
Published: October 2021

AbstractCorrosion is a significant issue for metals and alloys items because it critically affects their lifetimes. To protect the metal from corrosion, corrosion inhibitors can be added into coatings, but the inhibitor can leach into the environment. Polymer‐corrosion inhibitor conjugates are developed to solve this problem. However, corrosion can occur in various fields of applications, which then need a different level and type of metal's protection. β‐thiopropionate and ester linkages between polymer and inhibitor are selected as model for very labile and moderately labile linkages, respectively. The rate of inhibitor's release is controlled by the linkage of conjugated payloads. Corrosion measurements indicated that polymers with the β‐thiopropionate linkage are suitable for severe corrosion and short‐term applications, whereas the polymers with ester linkage can be used for mild corrosion and long‐term applications.
Sustainable textile fibers of bioderived polylactide/poly(pentamethylene 2,5‐furanoate) blends
Authors: Perin Davide , Fredi Giulia , Rigotti Daniele , Soccio Michelina , Lotti Nadia , Dorigato Andrea 
Published: October 2021

AbstractFuranoate polyesters are emerging as promising bioderived polymers that could replace petrochemical‐derived polyesters in several applications, for example, the textile field. Here, sustainable and fully bioderived fibers are wet‐spun by blending poly(lactic acid) (PLA) and poly(pentamethylene 2,5‐furanoate) (PPeF), with up to 50 wt% of PPeF. PLA/PPeF blends result as immiscible, with PPeF domains homogeneously distributed within the PLA matrix, as shown by scanning electron micrographs. The immiscibility is confirmed by differential scanning calorimetry, as the glass transition temperature of PLA is unaffected by PPeF. The immiscibility and poor adhesion between PLA and PPeF are responsible for the decrease in stress at break and elongation at break from 30.1 MPa and 127%, of PLA fibers, to 3.5 MPa and 1.9%, at high PPeF amounts. However, the addition of PPeF strongly decreases the PLA's tendency to absorb water and retain the processing solvents, showing a mass loss decrease from 3.1% for PLA fibers to 1% for fibers containing 50 wt% PPeF, thereby addressing one of the main drawbacks of PLA. These results, although preliminary, offer new directions for future works on innovative and sustainable fibers based on furanoate polyesters.
Functionalization of PMMA/TiO2 nanocomposites: Synthesis, characterization and their antioxidant and antibacterial evaluation
Authors: Singh Paramjit , Mirza Azar Ullah , Mondal Aftab Hossain , Mukhopadhyay Kasturi , Nishat Nahid 
Published: October 2021

AbstractThe present work reports the functionalization of PMMA and its nanocomposites were synthesized via simple solution mixing method. Functionalization of PMMA with different amino containing groups, that is, ethylene diamine (ED) and 4‐amino benzoic acid (PA) and used with low dosage (1 wt% and 3 wt%) of TiO2 nanoparticles (NPs) to form nanocomposites. The morphology was determined by SEM, average particle size (50 nm) of TiO2 NPs was measured by TEM. The pore radius (14.47 A°) and specific surface area (157.89 m2/g) of TiO2 NPs were measured by BET analysis. FT‐IR and NMR analysis confirms the functionalization of PMMA. The antioxidant activity of functionalized PMMA and its nanocomposites have been analyzed by using 2,2 diphenyl‐1‐picryhydrazyl (DPPH) assay. The antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) of functionalized polymer nanocomposites were investigated. The result revealed that functionalized PMMA (PMPA) shows maximum antioxidant activity. The increase in concentration of TiO2 NPs efficiently augments the bacterial inhibition against Gram‐negative and Gram‐positive bacteria. The maximum zone of inhibition (ZOI) was recorded against E. coli ATCC 25922 (30 mm) and S. aureus ATCC 29213 (31 mm) and minimum inhibitory concentration (MIC) over E. coli (64 μg/ml) and S. aureus (32 μg/ml) by PMPA2. The synthesized functionalized PMMA nanocomposites can be considered as promising material for biological applications.
Crystal growth of PPS nanofibers during annealing studied by solid‐state 13C CPMAS NMR
Authors: Asano Atsushi , Koyama Hiroyuki , Suzuki Akihiro 
Published: October 2021

AbstractInitial crystalline phase growth property for poly(p‐phenylene sulfide) (PPS) nanofibers during annealing are studied by means of the 13C high‐resolution solid‐state cross‐polarization/magic‐angle‐spinning NMR (13C CPMAS NMR) with spectral editing procedure using the difference in 1H spin‐lattice relaxation time in the rotating frame (T1ρH) between the crystalline and non‐crystalline phases. The PPS nanofibers are prepared by drawing the solid microfibers melted by a high‐power carbon dioxide (CO2) laser with supersonic jet velocity of 300–600 ms−1 in a vacuum chamber (CLSD method). The crystallinity and molecular orientation of the pristine drawn PPS nanofibers increase with decrease of the chamber pressure (pch). The growing process and the ordered chain packing of the crystalline phase during annealing depend on the initial chain orientation. The low pressures at pch = 30 and 10 kPa significantly relate to the initial nucleation growth of the PPS nanofibers. In the initial crystal growth of PPS nanofibers obtained at pch = 30 kPa for the low temperature annealing, the rearrangement of chains occurs, but for those at pch = 10 kPa the rearrangement does not occur. This is because the highly ordered chain alignments and packing are already achieved for PPS nanofibers obtained at pch = 10 kPa.
Nationalism and economic openness: The cross‐country evidence
Authors: Breunig Robert , Agarwal Vishesh , Arfin Sadia , Weldeegzie Samuel , Zhang Tong 
Published: October 2021

AbstractUsing cross‐country data, we find little evidence that economic openness has an impact on the level of nationalism in countries. We use three waves of the World Values Survey from 1999 through 2014 combined with data on economic openness from the Penn World Tables. Across all three waves, we find no statistically significant relationship between economic openness and nationalism. However, there is evidence for a negative association between economic openness and nationalism from 2001 to 2007 and a positive association between 2007 and 2014. This corresponds to the rising nationalistic and anti‐trade sentiment evident throughout the world despite the general trend of increasing economic openness.
Do consumers care about morality? A review and framework for understanding morality's marketplace influence
Authors: Philipp‐Muller Aviva , Teeny Jacob D. , Petty Richard E. 
Published: October 2021

AbstractThere are many ways consumers' morality has been shown to impact their marketplace behavior. We present a theoretical framework for how to conceive of and study marketplace morality in an attempt to unify these disparate findings. First, we describe two common conceptualizations of marketplace morality: (a) the attribute‐level approach (where a product attribute fits within a category that is normatively considered moral) and (b) the person‐level approach (where consumers differ in the extent to which they dispositionally value morality). We then introduce a third conceptualization: (c) the attitude‐level approach (where consumers differ in the extent to which they see their relevant attitude as based in their morality). Through this approach, we demonstrate morality's predictive utility for consumers' marketplace behaviors and help explain why other research could have found mixed evidence for its influence. Moreover, we use this approach to illuminate four contexts in which consumers' morality is more likely to influence marketplace attitudes and thereby impact their behavior: when the consumer's attitude is emotional, value‐relevant, identity‐relevant, and/or conceived in a negative valence. We conclude with a discussion of some of the unique challenges to attitude moralization in the marketplace as well as implications for managers promoting morally positioned purchases.
Applicability of semi‐pro unmanned aircraft system for rapid archaeological documentation in forested areas
Authors: Kamnik Rok , Jelenko Saša Djura , Perc Matjaž Nekrep 
Published: October 2021

AbstractThis paper tests the applicability of an unmanned aerial system (UAS) in obtaining spatial data from archaeological sites in forested areas. Our case study discusses the remains of the anti‐Turkish fortifications called ‘Turške Šance’—the defensive ditches that are preserved in the area of the Preški vrh (Ravne na Koroškem, Slovenia). Up to 10 fortifications of various shapes and sizes were built in the last quarter of the 15th century. Today, they represent a unique archaeological site. A detailed geodetic survey of the site was performed and compared with results of photogrammetry using the DJI Phantom 4 PRO UAS drone and DJI Phantom camera. Furthermore, official Slovenian LiDAR data of the area were obtained, and archaeologic field surveys, in situ inspections and metal detector scanning were made. The points obtained from the total station were used for 3D modelling and taken as a reference. Drone photogrammetry was performed once per week to compare each point cloud with another using CloudCompare and to the reference one depending on the volume of the tree leaves which was estimated with green leaf index (GLI) and leaf area index (LAI). The increase of the tree leaves volume deteriorates the point cloud obtained with a UAS. The paper analyses how significant this influence is. As expected, the impact grows more severe with the increase in leaf mass from week to week.
A Cell‐Culture Technique to Encode Glyco‐Nanoparticles Selectivity
Authors: Subramani Balamurugan , Chaudhary Preeti Madhukar , Kikkeri Raghavendra 
Published: October 2021

AbstractNanoparticles (NPs) embedded with bioactive ligands such as carbohydrates, peptides, and nucleic acid have emerged as a potential tool to target biological processes. Traditional in vitro assays performed under statistic conditions may result in non‐specific outcome sometimes, mainly because of the sedimentation and self‐assembly nature of NPs. Inverted cell‐culture assay allows for flexible and accurate detection of the receptor‐mediated uptake and cytotoxicity of NPs. By combining this technique with glyco‐gold nanoparticles, cellular internalization and cytotoxicity were investigated. Regioselective glycosylation patterns and shapes of the NPs could tune the receptors′ binding affinity, resulting in precise cellular uptake of gold nanoparticles (AuNPs). Two cell lines HepG2 and HeLa were probed with galactosamine‐embedded fluorescent AuNPs, revealing significant differences in cytotoxicity and uptake mechanism in upright and invert in vitro cell‐culture assay, high‐specificity toward uptake, and allowing for a rapid screening and optimization technique.
Recent Advances in Polyallenes: Preparation, Self‐Assembly, and Stimuli‐Responsiveness
Authors: Wang Chao , Zou Hui , Liu Na , Wu Zong‐Quan 
Published: October 2021

AbstractPolyallenes, as a typical type of reactive polymers, are of great significance and have aroused widespread interest because they contain double bonds that can be post‐modified into other functionalities to afford varieties of functional materials. This Minireview firstly highlights the recent advances in the preparation of polyallenes, including preparation of helical polyallenes through directly polymerization of chiral allene monomers or helix‐sense‐selective polymerization (HSSP) of achiral allene monomers, synthesis of 1,2‐regulated polyallenes and 2,3‐regulated polyallenes via selective polymerization of allene monomers, polymerization of allene monomers catalyzed by Ni(II)‐terminated poly(3‐hexylthiophene) (P3HT), and so on. Then, latest progress on the self‐assembly and stimuli‐responses of polyallene‐based diblock, ABA and ABC triblock copolymers is summarized. We hope this Minireview will inspire more interest in developing polyallenes and encourage further advances in functional materials.
Lipase‐mediated multicomponent synthesis of 1H‐Pyrazolo[1,2‐b]phthalazine‐5,10‐dione derivatives in a binary solvent medium
Authors: Dalal Kiran S. , Tayade Yogesh A. , Wagh Yogesh B. , Dalal Dipak S. , Chaudhari Bhushan L. 
Published: October 2021

AbstractA new method for the synthesis of 1H‐pyrazolo[1,2‐b]phthalazine‐5,10‐dione derivatives via lipase from the Aspergillus niger–catalyzed multicomponent reaction of aldehydes, malononitrile, and phthalhydrazide is reported herein for the first time. This novel method holds several advantages, including its efficiency, environmental friendliness, simple workup procedure, and good yield (70–86%). The effects of temperature, organic solvents, and water content were investigated. This protocol has the potential to replace traditional chemical synthesis routes for the synthesis of nitrogen‐containing heterocyclic compounds.
Evaluation of growth and some unexplored bioactivities of bioreactor grown adventitious root culture of ginseng (Panax ginsengC.A. Meyer)
Authors: Ahmed Sium , Shohael Abdullah Mohammad , Paek Kee Yoeup 
Published: October 2021

AbstractThe purpose of the present study was to evaluate the growth potential and some rarely reported bioactivities (antioxidant, thrombolytic, anticoagulant, and anthelmintic) ofPanax ginsengC.A. Meyer adventitious roots. To demonstrate the growth, shake flask and laboratory‐scale bioreactor cultures have been employed. The obtained biomass was dried and extracted with water, ethanol, and methanol. The growth ratio (12.62 ± 1.03) observed in the bioreactor was significantly higher than in the shake flask culture. The presence of 10 different phytochemical classes, including carbohydrates, saponins, glycosides, and terpenoids were detected in qualitative estimation. Significant quantities of phenolics, flavonoids, proteins, and tannins were determined. Dose‐dependent antioxidant activities were observed, and theIC50values of methanolic and ethanolic extracts were very similar to the standard. The highest (29.26 ± 5.31%) thrombolytic potential was shown by the methanolic extract. The ethanolic extract significantly extended the coagulation times up to 2.5 fold. The highest anthelmintic properties in terms of paralyzing (2.21 ± 0.31 min) and killing (3.69 ± 0.41 min) of the parasitic worms were displayed by the aqueous extract. The in vitro root growth implies the commercial feasibility of ginseng production in Bangladesh and the demonstration of potential bioactivities strengthens medicinal implications and also offering new research areas.
Internationalisation of rural small‐and‐medium enterprises from Nigeria: Examining social and organisational impact
Authors: Odunukan Kenny , Akter Mansura , Hack‐Polay Dieu , Rahman Mahfuzur , Igwe Paul 
Published: October 2021

AbstractDrawing on behavioural theory of the firm, this study examines internationalisation of rural small‐and‐medium enterprises (SMEs) in Nigeria and its impacts on social and organisational development. To examine how SME internationalisation affects societal and organisational development, the study collects cross‐sectional data using a structured questionnaire from 304 rural SMEs drawn from several sectors in Nigeria. Applying a partial least square based structural equation modelling, we tested the social and organisational impact of rural SMEs internationalisation. The results showed that there is a significant positive relationship between societal and organisational performances and internationalisation of SMEs. Both scores were significantly positively correlated with the internationalisation of SMEs in rural Nigeria. The study argues that internationalisation of rural SMEs' reflects on organisational progress and societal progress in terms of improving rural people's life. The findings of the study will act as the reference point to academicians and policymakers by which they could assess how internationalisation of rural SMEs matters for rural people's life and can strive to achieve inclusive and sustainable growth.
Progress and trends in integrating Industry 4.0 within Circular Economy: A comprehensive literature review and future research propositions
Authors: Agrawal Rohit , Wankhede Vishal A. , Kumar Anil , Luthra Sunil , Huisingh Donald 
Published: October 2021

AbstractSociety is facing many challenges, including, climate change, COVID, inequity and human population growth. Some researchers suggest that integration of Circular Economy (CE) and Industry 4.0 (I4.0) concepts and approaches can help us to make progress towards sustainable societies. Integrated implementation can help to improve the design of product–service systems focused on prevention and reduction of wastage of materials, energy, human health, and ecosystems. The CE practices enable consumers to return products after use and to reuse the products with more value. Will integrated adoption of CE and I4.0 practices help society to be more sustainable? What is known about the climate change benefits of integration of I4.0 and CEs to reduce energy and resource usage? The authors sought to answer these questions, via a systematic bibliometric literature review, and network analysis of literature on I4.0 and CE for logistics and supply chain applications. The review was performed by searching the SCOPUS database for literature about I4.0 and CE. A total of 165 articles were shortlisted for in‐depth review. The literature review was complimented by bibliometric and network analyses. The review provided insights into the present and future trends in integration of I4.0 and related Artificial Intelligence (AI) tools in CE's. Based on the findings, a framework for integrating I4.0 and CE, was developed to guide CE decision‐making that will help researchers and industrialists, integrate I4.0 tools within CEs to improve logistics, resource efficiency, safety, product quality and reduce fossil‐carbon footprints.
Biophysical properties of tense quaternary state polymerized human hemoglobins bracketed between 500 kDa and 0.2 μm in size
Authors: Cuddington Clayton T. , Wolfe Savannah R. , Palmer Andre F. 
Published: October 2021

AbstractPolymerized hemoglobin (Hb)‐based oxygen carriers (HBOCs) are a scalable and cost‐effective red blood cell (RBC) substitute. However, previous generations of commercial polymerized HBOCs elicited oxidative tissue injury in vivo due to the presence of low molecular weight polymeric Hb species (<500 kDa) and cell‐free Hb (64 kDa). Polymerized human Hb (PolyhHb) locked in the tense quaternary state (T‐state) exhibits great promise to meet clinical needs where past polymerized HBOCs failed. This work shows that separation of T‐state PolyhHb via a two‐stage tangential flow filtration (TFF) purification train such that the Hb polymers are bracketed between 500 kDa and 0.2 μm creates a uniform polymer size and largely eliminates the Hb species which elicit deleterious side effects in vivo. Biophysical characterization of these materials demonstrates their potential effectiveness as an RBC substitute and verifies the low percentage of low molecular weight Hb polymers and cell‐free Hb. Size exclusion chromatography confirms that T‐state PolyhHb can be consistently produced in a size range between 500 kDa and 0.2 μm. Furthermore, the average molecular weight of all PolyhHb species produced is one or two orders of magnitude larger than that of the commercial polymerized HBOCs Hemolink and Oxyglobin, respectively. Haptoglobin binding kinetics confirms that two‐stage TFF processing of PolyhHb reliably removes cell‐free Hb and low molecular weight polymeric Hb species. T‐state PolyhHbs demonstrate lower auto‐oxidation rates compared to unmodified Hb and prior generations of commercial polymerized HBOCs. These results demonstrate T‐state PolyhHb's feasibility as a next‐generation polymerized HBOC for potential use in transfusion medicine.
Synthesis, Antifungal Activity, DFT Study and Molecular Dynamics Simulation of Novel 4‐(1,2,4‐Oxadiazol‐3‐yl)‐N‐(4‐phenoxyphenyl)benzamide Derivatives
Authors: Yang Zihui , Liu Qingsong , Sun Yue , Sun Xuebao , Chen Linlin , Sun Lu , Gu Wen 
Published: October 2021

AbstractIn order to find novel potential antifungal agrochemicals, a series of new 4‐(1,2,4‐oxadiazol‐3‐yl)‐N‐(4‐phenoxyphenyl)benzamide derivatives 3a–j were designed, synthesized and characterized by their 1H‐, 13C‐NMR and HRMS spectra. The preliminary antifungal assay in vitro revealed that compounds 3a–j exhibited moderate to good antifungal activity against five plant pathogenic fungi. Especially, compound 3e presented significant antifungal activity against Alternaria solani, Botrytis cinerea and Sclerotinia sclerotiorum, superior to positive control boscalid. In the in vivo antifungal assay on tomato plants and cucumber leaves, compound 3e presented good inhibition rate against B. cinerea at 200 mg/L. Molecular dynamics simulation revealed that compound 3e could bind with the active site of class II histone deacetylase (HDAC).
The Chirality of Aggregated Yariv Reagents Correlates with Their AGP‐Binding Ability**
Authors: Hoshing Raghuraj , Leeber Blaise W. , Kuhn Helene , Caianiello David , Dale Brandon , Saladino Michael , Lusi Robert , Palaychuk Natalie , Weingarten Sarah , Basu Amit 
Published: October 2021

AbstractYariv reagents are glycosylated triphenylazo dyes that bind to arabinogalactan proteins (AGPs), proteoglycans found in plant cell walls that are integral for plant growth and development. Yariv reagents are widely utilized as imaging, purification, and quantification tools for AGPs and represent the only small molecule probe for interrogating AGP function. The ability of Yariv reagents to bind to AGPs is dependent on the structure of the terminal glycoside on the dye. The reason for this selectivity has not been understood until the present work. Using circular dichroism spectroscopy, we show that the Yariv reagents form supramolecular aggregates with helical chirality. More significantly, the ability of the Yariv reagent to bind AGPs is correlated with this helical chirality. This finding paves the way towards developing a more detailed understanding of the nature of the Yariv‐AGP complex, and the design of AGP‐binding reagents with higher affinities and selectivities.