bluuebunny/crossref_metadata_2025_split huggingface dataset:
Water Control with Gels Based on Synthetic Polymers under Extreme Conditions in Oil Wells
Authors: Guzmán-Lucero Diego , Martínez-Palou Rafael , Palomeque-Santiago Jorge Froylán , Vega-Paz Araceli , Guzmán-Pantoja Javier , López-Falcón Dennys Armando , Guevara-Rodríguez Felipe de Jesus , García-Muñoz Norma Araceli , Castillo-Acosta Silvia , Likhanova Natalya Victorovna 
Published: April 2022

AbstractA bibliographic review of research works dealing with gels based on synthetic polymers and their application in water control under harsh conditions was compiled. The extreme conditions were defined to be above 100 °C with 100 000 ppm of total dissolved solids, including divalent ions. Works describing laboratory experiments and oilfield implementations were also considered. According to current literature, some gels based on synthetic polymers have displayed desirable properties for water control, but in many cases, research is still at laboratory level. Therefore, further studies are required to understand the mode of action and stability of gels and polymers submitted to hard conditions in order to produce high‐performance prototypes.
Encapsulation of Quercetin in a Mixed Nanomicellar System to Enhance its Cytotoxicity against Breast Cancer Cells
Authors: Davarnejad Reza , Layeghy Kiyana , Soleymani Meysam , Ayazi Arvin 
Published: April 2022

AbstractThe therapeutic potential of quercetin‐loaded Pluronic® F‐127 (PF‐127)/Tween 80 mixed nanomicelles as a passive targeted drug delivery system for breast cancer therapy is evaluated. Quercetin‐loaded mixed nanomicelles with different mass ratios of drug/PF‐127/Tween 80 were prepared by thin‐film hydration method. The physical interactions of quercetin with PF‐127 and Tween 80 in an optimal ratio were investigated. The results of in vitro drug release experiments showed that the mixed micellar system exhibits a prolonged and sustained release behavior compared to the solution of free quercetin. The in vitro cytotoxicity studies of quercetin‐loaded mixed nanomicelles on breast cancer cells revealed that the encapsulated drug has a lower half‐maximal inhibitory concentration (IC50) value compared to the free drug.
TA Luft und Sterilflanschverbindungen
Authors: Gross Thomas , Riedl Alexander , Achenbach Manfred , Richter Bernhard 
Published: April 2022

AbstractUnter Federführung von Merck und der fachlichen Beratung durch die FH Münster wurde ein Fachgutachten in Zusammenarbeit mit dem Prüflabor Richter und der Einbindung eines Sachverständigenbüros zur änderung der TA Luft erarbeitet. Diese Ausarbeitung wurden in den relevanten fachlichen Gremien beim VDI und VCI vorgestellt und wird zukünftig für Flanschverbindungen im Kraftnebenschluss als neue Nachweismethode in die Normung (voraussichtlich VDI 2290) mit aufgenommen.
Explosionsschutz in der Prozesstechnik
Authors: Hansjürgen Dirk 
Published: April 2022

AbstractOb Umwelt‐ und Baustoffindustrie, Chemie‐ und Pharmaindustrie, Kosmetik‐ oder Lebensmittelherstellung. In nahezu allen Industriebereichen werden Schüttgüter gemischt. Dabei kommen Mischer auch in explosionsgefährdeten Bereichen zum Einsatz. Ein präventive
Photochemical Hydrogen Storage with Hexaazatrinaphthylene
Authors: Morawski Olaf , Gawryś Paweł , Sadło Jarosław , Sobolewski Andrzej L. 
Published: April 2022

AbstractWhen irradiated with violet light, hexaazatrinaphthylene (HATN) extracts a hydrogen atom from an alcohol forming a long‐living hydrogenated species. The apparent kinetic isotope effect for fluorescence decay time in deuterated methanol (1.56) indicates that the lowest singlet excited state of the molecule is a precursor for intermolecular hydrogen transfer. The photochemical hydrogenation occurs in several alcohols (methanol, ethanol, isopropanol) but not in water. Hydrogenated HATN can be detected optically by an absorption band at 1.78 eV as well as with EPR (electron paramagnetic resonance) and NMR techniques. Mass spectrometry of photoproducts reveal di‐hydrogenated HATN structures along with methoxylated and methylated HATN molecules which are generated through the reaction with methoxy radicals (remnants from alcohol splitting). Experimental findings are consistent with the theoretical results which predicted that for the excited state of the HATN‐solvent molecular complex, there exists a barrierless hydrogen transfer from methanol but a small barrier for the similar oxidation of water.
Methyl Oleate Synthesis by TiO2Photocatalytic Esterification of Oleic Acid: Optimisation by Response Surface Quadratic Methodology, Reaction Kinetics and Thermodynamics
Authors: Welter Rosilene A. , Santana Harrson , de la Torre Lucimara G. , Robertson Mark , Taranto Osvaldir Pereira , Oelgemöller Michael 
Published: April 2022

AbstractMethyl oleate, an example of a FAME (fatty acid methyl ester), was produced by oleic acid (OA) photoesterification with TiO2and UVA light. Different parameters were evaluated and optimised: catalyst pretreatment, temperature (25–65 °C), catalyst loading (1–30 % w/wOA) and oleic acid : alcohol molar ratio (1 : 3–1 : 55). Response surface quadratic methodology obtained by central composite rotational design (RSM‐CCRD) was used to evaluate the main operational conditions of the photoesterification process. A high conversion of 98 % (±0.8) at 55 °C, 20 % TiO2(w/wOA), and 1(OA) : 55(methanol) molar ratio was achieved. The photoesterification mechanism is furthermore proposed. The Langmuir‐Hinshelwood kinetic model considered the forward and backward reaction as first‐order fits with the best accuracy (R2of 0.997). The thermodynamic results (ΔG338.15K=−20.75 kJ/mol, ΔH=13.75 kJ/mol, and ΔS=0.47 kJ/mol.K) indicate that the operating conditions are important, both to supply the energy requirement of the reaction, but also to increase the miscibility of the reactants.
Optimizing the Electrolyte Systems for Na3(VO1−xPO4)2F1+2x (0≤x≤1) Cathode and Understanding their Interfacial Chemistries Towards High‐Rate Sodium‐Ion Batteries
Authors: He Jiarong , Tao Tao , Yang Fan , Sun Zhipeng 
Published: April 2022

AbstractInvited for this month′s cover is the group of Prof. Dr. Zhipeng Sun at the Guangdong University of Technology. The image shows how electrolyte composition and their interfacial chemistries play a crucial role in manipulating the cathode/electrolyte interphases (CEI) and their corresponding high‐rate electrochemical performance for sodium‐ion batteries. The Research Article itself is available at 10.1002/cssc.202102522.
Stable isotopes reveal minimal spatial and temporal variation in diet of the wrymouth (Cryptacanthodes maculatus)
Authors: Geissinger Emilie A. , Beal Brian F. , Ambrose William G. 
Published: April 2022

AbstractPredation by infaunal and epibenthic predators is often an important determinant of marine soft‐bottom community structure. The role of the predatory, benthic‐dwelling fish, the wrymouth (Cryptacanthodes maculatus), in the soft‐bottom food web has received little attention. The purpose of our study was to examine spatial and temporal variability in diet and trophic position of wrymouth at two lower intertidal sites in eastern Maine, USA. Wrymouth, their potential prey, and primary producers were collected in the spring and summer of 2013 in Machiasport and Beals, Maine. Stable isotope analysis was used to determine trophic position of the fish and its potential diet. Wrymouth δ13C signatures were influenced by location and ranged from −12.6‰ to −11.5‰, whereas δ15N signatures varied little (12.3‰–12.7‰) between locations or seasons. Wrymouth trophic position ranged from 3.02 to 3.48, indicating that they are tertiary consumers. The intertidal zone consisted of two distinct clusters of taxa, characterized by the presence of either macroalgae (mostly fucoids) or eelgrass (Zostera marina). Wrymouth diet consisted primarily of predatory polychaetes. Stable carbon and nitrogen isotope signatures varied across seasons and locations for multiple species, including our base species, Mya arenaria. Results suggest wrymouth are generalist feeders with limited seasonal and spatial variation in diet. Bottom‐up processes, however, are fundamentally different between the two study sites and influence their trophic structure. This result highlights the importance of collecting baseline data and evaluating trophic interactions at multiple spatial scales within small regional areas in coastal systems.
Utilizing causal diagrams across quasi‐experimental approaches
Authors: Arif Suchinta , MacNeil M. Aaron 
Published: April 2022

AbstractRecent developments in computer science have substantially advanced the use of observational causal inference under Pearl's structural causal model (SCM) framework. A key tool in the application of SCM is the use of casual diagrams, used to visualize the causal structure of a system or process under study. Here, we show how causal diagrams can be extended to ensure proper study design under quasi‐experimental settings, including propensity score analysis, before‐after‐control‐impact studies, regression discontinuity design, and instrumental variables. Causal diagrams represent a unified approach to variable selection across methodologies and should be routinely applied in ecology research with causal implications.
Are you ready for the heat? Phenotypic plasticity versus adaptation of heat tolerance in three‐spined stickleback
Authors: Mottola Giovanna , López María E. , Vasemägi Anti , Nikinmaa Mikko , Anttila Katja 
Published: April 2022

AbstractHeat waves constitute a challenge for aquatic ectotherms. However, the thermal tolerance of animals and their individual phenotypic plasticity to respond to heat waves may be influenced by thermal history. We tested these hypotheses by comparing the upper thermal tolerance and the individual capacities of three‐spined sticklebacks from populations with different thermal histories to respond to heat waves. Two populations originated from thermally polluted nuclear power plant (NPP) habitats, while four locations represented geographically adjacent control areas. To disentangle the genetic adaptation from the phenotypic plastic response, we measured the individual upper thermal tolerance and the responses at molecular level in common‐garden conditions before and after a laboratory‐mimicked heat wave. We found that the sticklebacks exhibit considerable phenotypic plasticity in thermal tolerance since the heat wave increased fish upper thermal tolerance significantly. The individual plasticity to respond to the heat wave was also negatively correlated with initial thermal tolerance. On the other hand, neither the thermal tolerance nor the plastic responses differed between NPP and control sites despite detection of significant but low genome‐wide divergence in 10 out of 15 pairwise comparisons. Our results suggest that five decades of NPP activity with warmer water have not resulted in a detectable evolutionary change in either the upper thermal tolerance or its plasticity in three‐spined sticklebacks potentially rendering them sensitive to frequent heat waves.
A CuOx/Cu/C electrocatalyst‐based gas diffusion electrode for the electroreduction of CO2 with high selectivity to C2H4
Authors: Chanda Vimanshu , Junqueira João R. C. , Sikdar Nivedita , Sanjuán Ignacio , Braun Michael , Dieckhöfer Stefan , Seisel Sabine , Andronescu Corina 
Published: April 2022

AbstractElectrochemical conversion of CO2 (CO2RR) has received significant attention since it could provide pathways for renewable energy storage to energy‐dense chemicals and synthetic fuels. We developed a novel CuOx/Cu/C type electrocatalyst via pyrolysis, which we used to convert CO2 at industrially relevantly current densities using gas diffusion electrodes. The influence of the pyrolysis conditions on the electrocatalytic CO2RR activity and selectivity was evaluated. Optimization of the electrode structure to mitigate electrowetting was done by mixing the catalyst with polytetrafluoroethylene (PTFE). We found that mixing the most active catalyst with PTFE in a mass ratio of 1 to 0.25 substantially increased the formation of C2H4 displaying 41% Faradaic efficiency (FE) at –240 mA cm–2. Prolonged CO2RR at different current densities shows that the electrode containing 25 wt.% PTFE in the catalyst layer display FEC2H4 > 40% at –280 mA cm–2 for 2 h.
Environmentally friendly dyeing of wool yarns using of combination of bio‐mordants and natural dyes
Authors: Hosseinnezhad Mozhgan , Gharanjig Kamaladin , Rouhani Shohreh , Razani Narjes , Imani Homan 
Published: April 2022

AbstractToday, the issue of reducing industrial pollution has received much attention. The textile industry is of high important throughout the world. However, its by‐product wastewater pollutes the environment. The first approach was the selection of plant‐based dyes (madder and reseda) and the application of tannin‐based mordants (pomegranate peel and myrobalan). The extraction of madder, reseda, and pomegranate peel in water with the ultrasound‐assisted method was done. In this article, pre‐mordanting method was used for mordanting and Cu (copper) and alum were selected as the mineral mordant to compare the results. Fourier Transform Infrared Spectroscopy method was employed to analyze the obtained extracts and to investigate the changes in the fibers. The results showed that K/S (color strength) values of the dyed samples increased by increasing the dye concentration. The colorfastness properties of the samples were investigated according the ISO standards.
High‐Voltage‐driven Li/Mn‐rich Li1.2Mn0.6Ni0.1Co0.1O2 Cathode with nanocomposite blend gel polymer electrolyte for long cyclic stability of rechargeable Li‐battery
Authors: Srivastava Nitin , Singh Shishir Kumar , Meghnani Dipika , Singh Rajendra Kumar 
Published: April 2022

AbstractLi/Mn‐rich layered oxide is an attractive cathode material for Li‐ion battery due to its low cost, high specific capacity, and high working potential. In this paper, the high capacity layered Li/Mn‐rich NMC cathode (Li1.2Mn0.6Ni0.1Co0.1O2) and nanocomposite blend gel polymer electrolytes (NBGPEs) are synthesized by using the sol‐gel method and solution casting technique, respectively. XRD results confirm that the cathode material has a well‐defined hexagonal layered structure. It is observed that the synthesized NBGPE containing 2 wt.% SiO2 nanofiller exhibits maximum ionic conductivity (5.2 mS cm−1), Li‐ion conductivity (~2.40 mS cm−1), and wide electrochemical stability (~5.4 V vs Li/Li+) at 30°C. The electrochemical performance of the cell (Li/NBGPE#1/Li1.2Mn0.6Ni0.1Co0.1O2) has been investigated by cyclic voltammetry and galvanostatic charge–discharge measurement. The cell delivers maximum specific discharge capacity of 212.0 mAh g−1 at 0.1C and good rate performance within 2.0‐4.8 V. At 0.2C, the cell shows stable coulombic efficiency ~98% after 200th cycle due to better interfacial stability between NBGPE#1 and the electrode.
Modulation of network centrality and gray matter microstructure using multi‐session brain stimulation and memory training
Authors: Thams Friederike , Külzow Nadine , Flöel Agnes , Antonenko Daria 
Published: April 2022

AbstractNeural mechanisms of behavioral improvement induced by repeated transcranial direct current stimulation (tDCS) combined with cognitive training are yet unclear. Previously, we reported behavioral effects of a 3‐day visuospatial memory training with concurrent anodal tDCS over the right temporoparietal cortex in older adults. To investigate intervention‐induced neural alterations we here used functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) datasets available from 35 participants of this previous study, acquired before and after the intervention. To delineate changes in whole‐brain functional network architecture, we employed eigenvector centrality mapping. Gray matter alterations were analyzed using DTI‐derived mean diffusivity (MD). Network centrality in the bilateral posterior temporooccipital cortex was reduced after anodal compared to sham stimulation. This focal effect is indicative of decreased functional connectivity of the brain region underneath the anodal electrode and its left‐hemispheric homolog with other “relevant” (i.e., highly connected) brain regions, thereby providing evidence for reorganizational processes within the brain's network architecture. Examining local MD changes in these clusters, an interaction between stimulation condition and training success indicated a decrease of MD in the right (stimulated) temporooccipital cluster in individuals who showed superior behavioral training benefits. Using a data‐driven whole‐brain network approach, we provide evidence for targeted neuromodulatory effects of a combined tDCS‐and‐training intervention. We show for the first time that gray matter alterations of microstructure (assessed by DTI‐derived MD) may be involved in tDCS‐enhanced cognitive training. Increased knowledge on how combined interventions modulate neural networks in older adults, will help the development of specific therapeutic interventions against age‐associated cognitive decline.
Exploring physician agency under demand‐side cost sharing—An experimental approach
Authors: Ge Ge , Godager Geir , Wang Jian 
Published: April 2022

AbstractThe assumption of patient‐regarding physicians has been widely adopted in the health economics literature. Physicians' patient‐regarding preferences are often described as the concern for the health benefits of medical treatments, and thus closely related to the norms and ethics of the medical profession. In this paper, we ask whether physicians' patient‐regarding preferences include a concern for their patient's consumption opportunities alongside patient's health benefits. To identify and quantify physicians' preferences, we design and conduct an incentivized laboratory experiment where choices determine separately the health benefits and the consumption opportunities of a real patient admitted to the nearest hospital. We find strong evidence that future physicians care about their patients' consumption opportunities.
Progressing towards nutritional health in Sub‐Saharan Africa: An econometric analysis of the effect of sustainable food production on malnutrition
Authors: Owusu Samuel Mensah , Chen Jianlin , Merz Ellen , Fu Chuanbo 
Published: April 2022

AbstractIn 1945 the Food and Agricultural Organization (FAO) chose its Latin motto ‘fiat panis’ which translates as ‘let there be bread’ to prevent an unprecedented health catastrophe as a result of endemic hunger and poor nutritional health. Despite the long standing effort in this regard, for so many people, especially in developing economies in sub‐Saharan Africa, access to enough, good quality, and constant supply of food and water remains an affront to good nutritional health. Globally, the FAO reports that 815 million people representing 10% of the population worldwide are currently undernourished. Our study investigates the effect of sustainable food production on malnutrition across sub‐Saharan African countries. An ensemble of more sophisticated econometric models is applied to dynamic cross‐country panel data from 16 countries in the 4 regions in Sub‐Saharan African. Our study is innovative because it makes a pioneering contribution to the available stock of literature on indicators of sustainable food production and malnutrition which is still at an embryonic stage. We note that even though sub‐Sahara African has a large tract of arable land, it negatively contributes towards malnutrition. We observed a positive and statistically significant relationship between food production (crop and livestock) and agricultural labour on malnutrition. Policy recommendations have been proposed to improve higher nutritional health through food production.
Which predictor is more predictive for Bitcoin volatility? And why?
Authors: Liang Chao , Zhang Yaojie , Li Xiafei , Ma Feng 
Published: April 2022

AbstractBeing more and more popular in the past 10 years, Bitcoin has drawn extensive attention from the press, scholars, and practitioners. The aim of this paper is to investigate which predictor is more predictive for Bitcoin volatility from the aspects of in‐sample and out‐of‐sample in a high‐speed changing world. We utilise the GARCH‐MIDAS model to examine the predictive power of five crucial predictors, including VIX, GVZ, Google Trends, GEPU, and GPR. Our findings provide strong evidence that GVZ exhibits strongest predictability for Bitcoin volatility over other competing predictors. Other empirical results based on different out‐of‐sample forecasting periods, alternative loss functions and combination methods further ensure our major conclusions are robust.
The predictive power of the term spread on inequality in the United Kingdom: An empirical analysis
Authors: Balcilar Mehmet , Berisha Edmond , Çepni Oğuzhan , Gupta Rangan 
Published: April 2022

AbstractA common tool in forecasting literature used in predicting future economic conditions is the term spread, which tends to contract near peaks and rise near troughs. Building on this known relationship, this paper explores the predictive power of the yield spread on the distribution of income in the United Kingdom (UK). The results reveal that income inequality responds negatively to increases in the yield spread over the medium‐term. Specifically, we show that the term spread can help to predict UK's income inequality growth both in‐ and out‐of‐sample. Our empirical findings show that it is the expected component of the term spread that has predictive power for lower income inequality in the UK.
White light phase shifting interferometric microscopy with whole slide imaging for quantitative analysis of biological samples
Authors: Mann Priyanka , Singh Veena , Tayal Shilpa , Thapa Pramila , Mehta Dalip Singh 
Published: April 2022

AbstractIn this paper, we demonstrate the white light phase shifting interferometer employed as whole slide scanner and phase profiler for determining qualitative and quantitative information over large field‐of‐view (FOV). Experiments were performed on human erythrocytes and MG63 Osteosarcoma cells. Here, we have recorded microscopic images and phase shifted white light interferograms simultaneously in a stepped manner. Sample slide is translated in transverse direction such that there exists a correlation between the adjacent frames, and they were stitched together using correlation functions. Final stitched image has a FOV of 0.24 × 1.14 mm with high resolution ~0.8 μm. Circular Hough transform algorithm is implemented to the resulting image for cell counting and five‐step phase shifting algorithm is utilised to retrieve the phase profiles over a large FOV. Further, this technique is utilised to study the difference between normal and anaemic erythrocytes. Significant changes are observed in anaemic cells as compared to normal cells.