bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of classical and developed indexing methods for assessing the groundwater suitability for irrigation
Authors: Islam Md. Shajedul , Mostafa Md. Golam 
Published: August 2022

AbstractIntroductionSeveral water quality indices exist to evaluate irrigation water quality (IWQ), but they have some limitations. This study attempted to develop a new Overall Irrigation Water Quality Index (Overall IWQIndex) using a rational subindex that is flexible enough and updated to signify irrigation water suitability. It considered the maximum verified desirable and permissible value of parameters, including the hazard class, a modified rating system of parameters in each hazard class, and diversified water parameters that have affected the soil and plants.Materials and MethodsA total of 40 calcite‐type groundwater samples were analyzed to evaluate the IWQ using the proposed Overall IWQIndex, some IWQ parameters, and different diagram‐based statistical methods.ResultsThe study results were correlated with each other critically, and finally, the suitability for IWQ was determined. The results revealed that the samples of the postmonsoon and premonsoon felt under the ‘good’ and ‘excellent’ categories, respectively.ConclusionThe study developed an indexing model that is easy to compute, rationalize and deliver accurate information on the suitability of irrigation water.
Magnetic Coconut Shell‐Derived Activated Carbon Adorned with Cu2O Nanoparticles: A Green and Efficient Porous Catalyst for N‐Arylation of Hetero‐Aromatics in Eutectic Medium
Authors: Mirshafiee Sogand , Salamatmanesh Arefe , Heydari Akbar 
Published: August 2022

AbstractIn the current research, a green, robust, and economical metal oxide‐based nanocatalyst has been developed by functionalization of coconut shell‐derived mesoporous activated carbon with magnetically separable amino acid and subsequent decoration with Cu2O nanoparticles (Fe3O4@L‐arginine‐AC−Cu2O). This magnetic nanostructure was analyzed by different techniques including FT‐IR, FE‐SEM, EDX/MAP, XRD, TEM, TGA, VSM, BET, and ICP‐OES. The catalytic efficiency of the nanoparticles was studied in Ullmann N‐arylation reaction of some N‐heterocycle compounds including indole, imidazole, and pyrrole with various aryl halides in choline chloride/glycerol (1 : 2), which is a green and biomass‐based deep eutectic solvent (DES). The reaction proceeded smoothly and the desired N‐arylation products were obtained in good to excellent yields (75‐96 %). Notably, the magnetic porous nanocatalyst can be easily separated and reused at least six times without a notable decrease in its performance. The solvent is also able to recover, thereby increasing the attractiveness of this approach. In other words, this approach can serve to significantly expand the scope of the C−N coupling products for their applications in further studies.
Chemoselective Synthesis of Tyrosine‐Based Polymers and Comparison of Their Thermal, Kinetic, and Dielectric Properties
Authors: Çalışkan Eray 
Published: August 2022

AbstractBoth synthetic chemistry and polymer science, benefiting from click chemistry, have paved the way for the easy synthesis and use of polymer compounds in various application areas. In this work, a chemoselective polymerization reaction (for the synthesis of polymer 1) in which click reaction occurred in a further step (for the synthesis of polymer 2) was carried out through the monomer obtained from the reaction of tyrosine with propargyl amine (PA) and methyl methacrylate. Polymer 2 was synthesized from azido end chalcone and the polymer carrying alkyne in its side chain by using the click chemistry. The average activation energy of polymers 1 and 2 were 116.95 and 81.54 kJ mol−1, respectively. The thermal and dielectric properties of both polymers were compared. The results indicated that the alkyne ends in polymer 1 are completely converted into triazole rings after the click reaction, and polymer 2 gained more thermal stability and dielectric property compared to polymer 1. Dielectric constant (ϵ′) of polymer 2 (16.42) increased about 2.70 fold after the addition of the chalcone group to polymer 1 (6.09). These results indicate that polymer 2 with a high dielectric constant is a potential compound to use in electronic applications such as capacitors.
Ultrasensitive Chemically Modified Carbon Paste Sensor for Reliable and Selective Potentiometric Determination of Trace Amounts of Sitagliptin in Real Samples
Authors: Abdi Arezoo , Soleymanpour Ahmad , Shafaatian Bita 
Published: August 2022

AbstractA new chemically modified potentiometric carbon paste electrode was fabricated based on incorporation of the ion association complex of sitagliptin‐phosphotungstate to determine sitagliptin. The proposed sensor displayed a Nernstian slope of 59.4 mV/decade for sitagliptin over a concentration range of 1.7×10−8 to 2.2×10−5 M and a detection limit of 9.1×10−9 M. It represented the advantages of fast response, long lifetime and, most importantly, excellent selectivity for sitagliptin versus a wide variety of usual inorganic cations and also biological species such as amino acids and sugars. The temperature dependence of sensor potential was examined, and it was figured out that the sensor has a low thermal coefficient in the temperature range of 15–55 °C. The sensor was applied to determine sitagliptin in pharmaceutical tablets, milk and blood serum samples. The obtained suitable recoveries and relative standard deviations confirmed that the developed sensor could be precisely applied to determine sitagliptin in real samples.
An Efficient Approach to Pyrene‐based Aggregation‐induced Emission Luminogens
Authors: Guo Hongxi , Song Xinyi , Wang Xiaohui , Liu Yiwei , Redshaw Carl , Feng Xing 
Published: August 2022

AbstractTo suppress the fluorescence quenching of pyrene in the aggregation state, this article presents a facile strategy for the construction of pyrene‐based aggregation‐induced emission luminogens (AIEgens) via decorating the pyrene core with benzophenone units at the 1‐, 2‐ or 2,7‐positions. This set of pyrene‐based compounds 1–3 displayed a weak deep blue fluorescence in solution, but an enhanced excimer emission with λem max of 426–436 nm in the aggregation state. Interestingly, unlike reported benzophenone derivatives, this series of compounds did not exhibit thermally activated delayed fluorescence/ phosphorescent properties.
Regioselective Oxidative Halotriflamidation of Dienes and Trienes as a Route to New Amidines and Heterocycles
Authors: Garagan Ivan A. , Moskalik Mikhail Yu. , Astakhova Vera V. , Sterkhova Irina V. , Vashchenko Alexander V. , Albanov Alexander I. , Shainyan Bagrat A. 
Published: August 2022

AbstractComparative analysis of halotriflamidation of linear and cyclic dienes and trienes in different oxidative systems revealed a large variety of reactivity patterns. With linear dienes the haloamidation or solvent (MeCN) interception products or the products of their further transformations are formed. The NBS‐induced reactions of conjugated cyclic dienes (cyclopentadiene, 1,3‐cyclohexadiene, 1,3‐cyclooctadiene) regioselectively afford bromoamidines at only one double bond with solvent interception. Dicyclopentadiene also gives bromamidine at the bicycloheptene double bond. With linear 5‐methylhepta‐1,3,6‐triene, 1,4‐conjugate addition occurs with solvent interception and the halogen atom directed to the terminal olefinic carbon. Cyclododeca‐1,5,9‐triene reacts with triflamide differently depending on the oxidant to give amidine or azabicyclo[8.2.1]tridec‐5‐ene structure. The synthesized bromoamidines were converted into the corresponding imidazolines in close to quantitative yield.
Nanoengineered Granular Hydrogel Bioinks with Preserved Interconnected Microporosity for Extrusion Bioprinting
Authors: Ataie Zaman , Kheirabadi Sina , Zhang Jenna Wanjing , Kedzierski Alexander , Petrosky Carter , Jiang Rhea , Vollberg Christian , Sheikhi Amir 
Published: August 2022

Abstract3D bioprinting of granular hydrogels comprising discrete hydrogel microparticles (microgels) may overcome the intrinsic structural limitations of bulk (nanoporous) hydrogel bioinks, enabling the fabrication of modular thick tissue constructs. The additive manufacturing of granular scaffolds has predominantly relied on highly jammed microgels to render the particulate suspensions shear yielding and extrudable. This inevitably compromises void spaces between microgels (microporosity), defeating rapid cell penetration, facile metabolite and oxygen transfer, and cell viability. Here, this persistent bottleneck is overcome by programming microgels with reversible interfacial nanoparticle self‐assembly, enabling the fabrication of nanoengineered granular bioinks (NGB) with well‐preserved microporosity, enhanced printability, and shape fidelity. The microporous architecture of bioprinted NGB constructs permits immediate post‐printing 3D cell seeding, which may expand the library of bioinks via circumventing the necessity of bioorthogonality for cell‐laden scaffold formation. This work opens new opportunities for the 3D bioprinting of tissue engineering microporous scaffolds beyond the traditional biofabrication window.
Analysis of dynamic size effect of recycled concrete using base force element method
Authors: Peng Yijiang , Zakaria Semaoui , Ying Liping , Cao Wei , Yang Hongming , Sun Yucheng 
Published: August 2022

AbstractA 2D meso models of recycled concrete with different sizes is established using the base force element method. The specimens are loaded with different strain rates. The meso damage of recycled concrete is analyzed. In addition, the structural performance of specimens under the joint actions with strain rate and size are also studied. The simulation results find that the compressive strength has little difference when the values of strain rates are lower than 0.1 s−1. The greater the strain rates, the greater the difference of compressive strength between different sizes when strain rates are larger than 0.1 s−1. In addition, the Bažant statistical theory can be used to analysis the mechanical properties of recycled concrete. Besides, a modified formula in calculating the dynamic size effect of recycled concrete is also given based on the Bažant statistical size effect theory.
Effect of bariatric surgery on maternal cardiovascular system
Authors: Patel D. , Borrelli N. , Patey O. , Johnson M. , Di Salvo G. , Savvidou M. D. 
Published: August 2022

ABSTRACTObjectiveBariatric surgery is a successful treatment for sustainable weight loss and has been associated with improvement in cardiovascular function. Pregnancy after bariatric surgery is becoming increasingly common; however, little is known about the maternal cardiovascular system postsurgery. The aim of this study was to investigate maternal cardiovascular adaptation to pregnancy in women with previous bariatric surgery, compared with that in women with no history of weight‐loss surgery and an early‐pregnancy body mass index (BMI) similar to the presurgery BMI of the postbariatric women.MethodsThis was a prospective, observational, longitudinal study conducted from April 2018 to June 2020 including 30 pregnant women who had undergone bariatric surgery and 30 who had not, matched for presurgery BMI. Participants were seen at three timepoints during pregnancy: 12–14, 20–24 and 30–32 weeks' gestation. At all visits, maternal blood pressure (BP) was measured and cardiac geometry and function were assessed using two‐dimensional (2D) transthoracic echocardiography. On a subset of patients (15 in each group), 2D speckle tracking was performed to assess global longitudinal and circumferential strain. Offline analysis was performed, and multilevel linear mixed‐effects models were used for all comparisons.ResultsCompared with the no‐surgery group, and across all trimesters, pregnant women with previous bariatric surgery had lower BP, heart rate and cardiac output and higher peripheral vascular resistance (P < 0.01 for all). Similarly, the postbariatric group demonstrated more favorable cardiac geometry and diastolic indices, including lower left ventricular mass, left atrial volume and relative wall thickness, together with higher E‐wave/A‐wave flow velocity across the mitral valve and higher mitral velocity (E′) at the lateral and medial annulus on tissue Doppler imaging (P < 0.01 for all). There was no difference in ejection fraction, although global longitudinal strain was lower in postbariatric women (P < 0.01), indicating better systolic function.ConclusionOur findings indicate better maternal cardiovascular adaptation in women with previous bariatric surgery compared with presurgery BMI‐matched pregnant women with no history of weight‐loss surgery. © 2022 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
Role of copper alumina nanoparticles on the performance of polyvinylchloride nanocomposites
Authors: Suvarna S. , Furhan  , Parvathi K. , Ramesan M. T. 
Published: August 2022

AbstractPoly(vinyl chloride) (PVC) nanocomposites with different contents of copper alumina (Cu‐Al2O3) nanoparticles were prepared by the solution casting method. The effects of the nanoparticles on structural, thermal, electrical, contact angle and mechanical properties were thoroughly examined. The presence of Cu‐Al2O3 in the macromolecular chain was confirmed through Fourier transform infrared (FTIR) spectroscopy. The X‐ray diffraction (XRD) analysis of PVC nanocomposites showed the systematic arrangement of Cu‐Al2O3 nanoparticles within the polymer, which indicated the higher crystallinity of the nanocomposites. The surface morphology of PVC was changed into hemispherical shaped particles by the inclusion of nanofiller was analyzed from SEM images. The glass transition temperature of the nanocomposites obtained from differential scanning calorimetry (DSC) was found to be increased with an increase in loading of nanoparticles in the polymer. The AC conductivity and dielectric studies revealed that the inclusion of nanofiller increases the electrical properties of the material and the composite with 7 wt.% sample showed the maximum conductivity and dielectric constant. The mechanical properties such as modulus, tensile strength, hardness, and impact properties of the PVC nanocomposites were significantly enhanced by the reinforcement of nanoparticles into the PVC matrix. The reinforcing mechanism behind the increase in tensile strength with the addition of nanoparticles was correlated with different theoretical models. The highest mechanical and electrical properties were observed for 7 wt.% Cu‐Al2O3 loaded nanocomposite. Contact angle measurements of PVC with various loadings of Cu‐Al2O3 nanofillers demonstrated that the nanoparticle attachment increased the hydrophobicity of the polymer matrix.
Barriers to enrollment in National Health Insurance Scheme among informal sector workers in Nigeria
Authors: Aregbeshola Bolaji S. , Khan Samina M. 
Published: August 2022

AbstractExtending health insurance coverage to informal sector populations remains a major challenge toward achieving universal health coverage. This study aimed to fill the gap in the literature by examining barriers to enrollment in National Health Insurance Scheme (NHIS) among informal sector workers in Nigeria. Data were drawn from the 2018 Nigeria Demographic and Health Survey. The study population comprised of men (n = 10,163) and women (n = 22,216) working in the informal sector. Bivariate and multivariate logistic regression were used to examine barriers to enrollment in NHIS. Results show that the majority of men (98.9%) and women (98.6%) were not enrolled in NHIS. Age, gender of household head, educational level, socioeconomic status, geopolitical zone, distance to a health facility, frequency of reading newspapers or magazines, and watching television were significantly associated with non‐enrollment in NHIS. Findings suggest that enrollment in NHIS in Nigeria is very low. Additionally, there are significant barriers to enrollment. There is a need for governments and policymakers to address these barriers. The use of voluntary prepayments from informal sector workers as a strategy to extend health insurance coverage has not been effective.
New bounds on axion-like particles from MicroBooNE
Authors: Coloma Pilar , Hernández Pilar , Urrea Salvador 
Published: August 2022

Abstract
Neutrino experiments lie at the edge of the intensity frontier and therefore can be exploited to search for new light particles weakly coupled to the visible sector. In this work we derive new constraints on axion-like particles (ALPs) using data from the MicroBooNE experiment, from a search for e+e− pairs pointing in the direction of the NuMI absorber. In particular, we consider the addition of higher-dimensional effective operators coupling the ALP to the electroweak gauge bosons. These would induce K → πa from kaon decay at rest in the NuMI absorber, as well as ALP decays into pairs of leptons or photons. We discuss in detail and compare various results obtained for the decay width K → πa in previous literature. For the operator involving the Higgs, MicroBooNE already sets competitive bounds (comparable to those of NA62) for ALP masses between 100 and 200 MeV. We also compute the expected sensitivities from the full NuMI dataset recorded at MicroBooNE. Our results show that a search for a a → γγ signal may be able to improve over current constraints from beam-dump experiments on the operator involving the ALP coupling to the W.
Modular anomaly equation for Schur index of $$ \mathcal{N} $$ = 4 super-Yang-Mills
Authors: Huang Min-xin 
Published: August 2022

Abstract
We propose a novel modular anomaly equation for the unflavored Schur index in the $$ \mathcal{N} $$
N
= 4 SU(N) super-Yang-Mills theory. The vanishing conditions overdetermine the modular ambiguity ansatz from the equation, thus together they are sufficient to recursively compute the exact Schur indices for all SU(N) gauge groups. Using the representations as MacMahon’s generalized sum-of-divisors functions and Jacobi forms, we then prove our proposal as well as elucidate a general formula conjectured by Pan and Peelaers.
ZH production in gluon fusion at NLO in QCD
Authors: Chen Long , Davies Joshua , Heinrich Gudrun , Jones Stephen P. , Kerner Matthias , Mishima Go , Schlenk Johannes , Steinhauser Matthias 
Published: August 2022

Abstract
We present fully differential next-to-leading order results for Higgs production in association with a Z boson in gluon fusion. Our two-loop virtual contributions are evaluated numerically using sector decomposition, including full top-quark mass effects, and supplemented at high pT by an analytic high-energy expansion to order $$ {m}_Z^4,{m}_H^4,{m}_t^{32} $$

m
Z
4

,

m
H
4

,

m
t
32

. Using the expanded results we also present a study of the top-quark mass scheme uncertainty at large pT.
2D Ising Field Theory in a magnetic field: the Yang-Lee singularity
Authors: Xu Hao-Lan , Zamolodchikov Alexander 
Published: August 2022

AbstractWe study Ising Field Theory (the scaling limit of Ising model near the Curie critical point) in pure imaginary external magnetic field. We put particular emphasis on the detailed structure of the Yang-Lee edge singularity. While the leading singular behavior is controlled by the Yang-Lee fixed point (= minimal CFT$$ \mathcal{M} $$M2/5), the fine structure of the subleading singular terms is determined by the effective action which involves a tower of irrelevant operators. We use numerical data obtained through the “Truncated Free Fermion Space Approach” to estimate the couplings associated with two least irrelevant operators. One is the operator$$ T\overline{T} $$TT¯, and we use the universal properties of the$$ T\overline{T} $$TT¯deformation to fix the contributions of higher orders in the corresponding coupling parameterα. Another irrelevant operator we deal with is the descendantL_4$$ \overline{L} $$L¯_4ϕof the relevant primaryϕin$$ \mathcal{M} $$M2/5. The significance of this operator is that it is the lowest dimension operator which breaks integrability of the effective theory. We also establish analytic properties of the particle massM(= inverse correlation length) as the function of complex magnetic field.
Robot-assisted vs traditional percutaneous freehand for the scaphoid fracture treatment: a retrospective study
Authors: Xiao Chengwei , Wei Dan , Zhu Zongdong , Chen Hui , Zhou Weijun , Tang Xiaoming , Yuan Jiabin , Wang Yue , Hu Jiang 
Published: August 2022

Abstract
Purpose
The purpose of this study was to assess the efficiency, safety, and accuracy of cannulated screw fixation using a robot-assisted method compared with a traditional percutaneous freehand method.

Methods
This retrospective clinical study included 18 patients with scaphoid fracture who underwent cannulated screw fixation by robot-assisted technique or traditional percutaneous freehand technique from June 2018 to June 2020. All patients were divided into the robot-assisted group (9 patients) or the traditional surgery group (9 patients). The operation time, blood loss, number of intra-operative fluoroscopies, fracture healing time, Mayo wrist function score, and screw implantation accuracy were recorded in the two groups.

Results
The average age of the robot-assisted group was 37.9 ± 10.6 years (with a range of 30 to 52 years), there were eight males and one female, and there were six cases of scaphoid fracture on the right side and three on the left side. The average pre-operative time was 2.8 ± 0.7 days (ranging from 1 to 3 days). The average age of the traditional surgery group was 31.6 ± 6.8 years (with a range of 20 to 45 years), there were eight males and one female, and there were five cases of scaphoid fracture on the right side and four on the left side. The average pre-operative time was 2.1 ± 0.8 days (with a range of 2 to 4 days). The number of intra-operative fluoroscopies was 24.4 ± 3.5 in the traditional surgery group, whereas it was only 10.1 ± 1.9 in the robot-assisted group, which was significantly lower (P < 0.05). The average operation time of the traditional operation group was 48.4 ± 12.2 min, and that of the robot-assisted group was 32.6 ± 4.2 minutes, which was significantly shorter (P < 0.05). The angles between the actual screw position and the central axis of the scaphoid on both the coronal and sagittal post-operative CT images were 8.3° ± 2.3° and 8.8° ± 1.6° for the traditional operation group and 3.8° ± 0.8° and 4.3° ± 1.2° for the robot-assisted group, so the accuracy of the robot-assisted group was significantly higher (P < 0.05). There were no significant differences between the two groups in wrist function recovery or fracture healing time.

Conclusion
Robot-assisted treatment of scaphoid fracture is more accurate than traditional freehand technology, with shorter operation time and fewer intra-operative fluoroscopies. There is no difference between the two surgical techniques in intra-operative bleeding, post-operative fracture healing, or functional recovery. Robot-assisted surgery is a safe, effective, and accurate method for treating scaphoid fracture.