bluuebunny/crossref_metadata_2025_split huggingface dataset:
Facile Synthesis of Glycidyl Azide Polymer (GAP) in a Tetrabutylammonium Bromide/Ethylene Glycol Based Deep Eutectic Solvent
Authors: Shin Jung‐Ah , Jung Jihye , Moon Youngtaek , Lee Sejin 
Published: August 2023

AbstractGlycidyl azide polymer (GAP) is an energetic material used in composite solid rocket propellants. Herein, a novel synthetic method for GAP was introduced using a tetrabutylammonium bromide and ethylene glycol‐based deep eutectic solvent (DES). Using this DES combination, the azidation of poly(epichlorohydrin) was successfully conducted within several hours. This strategy eliminates the use of organic solvents during the entire synthetic process and provides the advantage of recovery and reuse of the DES.
A Novel Red Fluorescent Probe for the “Off‐On‐Off” Detection of Al3+ and F− in Samples of Drinking Water and Toothpaste
Authors: Zhang Yang , Wang Haibin , Yao Yelin , Deng Linlong , Hu Hao , Xue Lei 
Published: August 2023

AbstractA novel fluorescent sensor based on coumarin was developed for the sequential detection of Al3+ and F− ions in ethanol, exhibiting a large Stokes shift of 190 nm. The probe displayed “off‐on‐off” responses towards Al3+ and F− at the red region of 630 nm, with detection limits of 2.48×10−8 M and 2.34×10−8 M, respectively. The binding mechanism between the probe and Al3+ was elucidated using Job‘s plot, 1H NMR, optical titrations, and ESI‐MS. Additionally, the probe demonstrated an AIE property in DMSO/H2O solutions. Its successful application in measuring Al3+ and F− in water samples was observed. Moreover, with the convenience of “naked eye” detection, the probe could be effectively utilized for identifying F− in toothpastes.
A novel ZnO/3A catalyst with coking resistance for acetylene acetoxylation
Authors: Liu Hao , Zhang Peng , Zhu Mingyuan 
Published: August 2023

AbstractA novel ZnO/3A (3A molecular sieve) catalyst was prepared by using a direct hydrolysis method and applied for acetylene acetoxylation. After optimizing the loading of Zn, we compared the catalytic performance of ZnO/3A and ZnO/AC (activated carbon), and found that catalytic performance of ZnO/3A was lower than ZnO/AC due to its weaker acetylene adsorption. ZnO/3A exhibited excellent thermal stability, which is useful for its coke resistence by removing the carbon deposition. By characterizing the fresh, deactivated and regenerated ZnO/3A catalysts, it was found that the active zinc component loss was the main cause of its deactivation, while carbon deposition did not affect catalytic performance of ZnO/3A catalyst.
Electrochemical Synthesis of Superparamagnetic Fe3O4 Nanoparticles for the Photo‐Fenton oxidation of Rhodamine B
Authors: Magomedova Asiyat , Isaev Abdulgalim , Orudzhev Farid , Alikhanov Nariman , Emirov Ruslan , Rabadanov Murtazali , Mingshan Zhu 
Published: August 2023

AbstractMagnetite (Fe3O4) is one of the widely used materials as a catalyst in the photo‐Fenton process for the oxidation of dyes. We report about the electrochemical synthesis of the superparamagnetic Fe3O4 nanoparticles. The structure, morphology, chemical composition, and chemical state of the catalyst were characterized. The synthesized samples of superparamagnetic Fe3O4 nanoparticles were characterized using scanning electron microscopy, X‐ray diffraction spectroscopy (XRD), Raman shift spectroscopy, and vibrating magnetometer (VSM). The diffraction peaks and Raman shift spectra confirm the formation of Fe3O4. Superparamagnetic Fe3O4 nanoparticles were used as a catalyst for the oxidation of Rhodamine B (RhB) in a photo‐Fenton‐like process. The effect of operating parameters, including H2O2 concentration, catalyst concentration, and RhB concentration, on the RhB decomposition efficiency was investigated. The rate of color removal was 85 % after 12 minutes at RhB concentration of 2 mg/L, H2O2 concentration of 0.18 mM, and Fe3O4 concentration of 0.2 g/L. In addition, electrochemically synthesized superparamagnetic Fe3O4 nanoparticles showed that the catalyst activity decreased by only 7 % during recycling experiments, indicating long‐term stability of the sample.
Synthesis of Macrocyclic Musk‐Like Compounds through Ring‐Expansion Metathesis and Tebbe Olefination as Key Steps
Authors: Kotha Sambasivarao , Agrawal Arpit 
Published: August 2023

AbstractHerein, we report the 16‐ and 19‐membered macrocycles which are closely resembles structurally musk like compounds such as “muscone”. These macrocycles were prepared starting from 12‐membered cyclododecanone and 15‐membered cyclopentadecanone ring systems respectively. Like muscone, these compounds have a methyl and keto groups embedded within the macrocyclic ring system. The key reactions include, ring‐closing metathesis (RCM) and Tebbe olefination which are highly efficient and easy to perform. This strategy is very useful in the formation of macrocyclic systems.
Ring‐Rearrangement Metathesis Approach to Fused [5/5/6/5/5] and [6/5/5/5/5/6] Carbocyclic Derivatives.
Authors: Kotha Sambasivarao , Chaurasia Usha Nandan , Jena Kunkumita 
Published: August 2023

AbstractHere, we have developed a simple synthetic approach towards synthesis of [5/6/5] and [5/5/5] fused carbocyclic frameworks from bis‐adducts of norbornadiene and cyclohexadiene derivatives with 1,2,3,4‐tetrachloro‐5,5‐dimethoxycyclopentadiene by employing atom‐economic ring‐rearrangement metathesis as a key step and these ring systems are core units in natural products. Here, we have designed highly congested polycyclic frameworks and introduced molecular complexity in a minimum number of steps. These targets contain up to seven stereo centres. Hence, this strategy can be used to design many different drug‐like molecules valuable in medicinal chemistry.
Reliability performance in tension governed reinforced concrete reservoirs as a function of target crack width
Authors: Way Andrew C. , Viljoen Celeste 
Published: August 2023

AbstractThe limit state that typically governs the design of circular reinforced concrete water retaining structures is the limitation of leakage through cracks. Current design codes prescribe target crack widths in the range of 0.05–0.2 mm, depending on the design situation, to limit leakage to acceptable levels. Fairly high model uncertainty exists in the prediction of load‐induced crack widths and the beneficial effect of autogenous self‐sealing has not effectively been quantified, so that the achieved levels of reliability using current codified procedures are unknown. This research uses a reliability analysis previously developed by the authors to assess the level of SLS reliability achieved in tension‐governed reinforced concrete reservoirs covering much of the scope of practice. The SLS reliability performance is evaluated using a limit state of allowable versus predicted leakage, including a probabilistic quantification of the effect of autogenous self‐sealing, and the uncertainty present in the prediction of load‐induced crack widths. Many permutations of practical reservoir geometries are considered for four combinations of stabilization period and water tightness test time (leakage regimes) typically used in water tightness tests. The target crack width recommendations of EN 1992‐3 and Model Code 2010 are evaluated across the range of geometries and leakage regimes. The commonly used target crack width of , recommended by Model Code 2010 and many other codes, was found to be inadequate to achieve a target SLS reliability index of . The values from EN 1992‐3 showed better performance but were found to result in reliability indices frequently in excess of , indicating that the values are perhaps too stringent. Results confirm that smaller target crack widths and longer water tightness test times increase the achieved reliability. However, even for a given target crack width and leakage regime, a substantial range of achieved reliabilities is observed depending on reservoir configuration. This shows that design to meet current target crack widths is not effective at meeting target reliability across the range of practical application. A suggestion is made to refine reservoir specific crack width targets to achieve target reliability more consistently.
Restricted maternal nutrition and supplementation of propylene glycol, monensin sodium and rumen‐protected choline chloride during late pregnancy does not affect muscle fibre characteristics of offspring
Authors: Ahmadzadeh‐Gavahan Leila , Hosseinkhani Ali , Hamidian Gholamreza , Jarolmasjed Seyedhosein , Yousefi‐Tabrizi Reza 
Published: August 2023

AbstractBackgroundGrazing in arid and semi‐arid regions faces pregnant ewes with feed restrictions and hence affects the offspring muscle fibre characteristics. Using feed additives that enhance nutrient availability during foetal muscle development is expected to alter offspring skeletal muscle characteristics.ObjectivesThis study evaluated the effect of maternal restricted nutrition and supplementation of propylene glycol, monensin sodium and rumen‐protected choline chloride on lamb's muscle fibre characteristics.MethodsForty‐eight Ghezel ewes were randomly allocated to one of six diets (N = 8) during the last 6 weeks of gestation: ad libitum feed intake (AL); restricted feeding (RF); restricted feeding containing propylene glycol (PG); restricted feeding containing propylene glycol and monensin sodium (MS); restricted feeding containing propylene glycol and rumen‐protected choline chloride (RPC); restricted feeding containing propylene glycol, monensin sodium and rumen‐protected choline chloride (PMC). The muscle samples were obtained from the semitendinosus muscle of 2‐week‐old male lambs (n = 5/treatment) via biopsy and were stained and classified as fibre types I, IIA and IIB.ResultsPre‐parturient maternal feed restriction and administration of propylene glycol, monensin sodium and rumen‐protected choline chloride had no significant effect on fibre‐type composition, fibre density of muscle, muscle cross‐sectional area and volume density of fibres (p > 0.05).ConclusionsEither maternal dietary restriction or supplementation of nutrient flux–involved additives during late pregnancy did not alter muscle fibre development and had no short‐term effects on muscle properties of the resulting offspring as myogenesis occurs in early and mid‐gestation, not late gestation. Therefore, maternal nutrition may not be a problematic issue in sheep production in arid and semi‐arid areas.
In situstudies on the industrial production process for molybdenum dioxide, MoO2
Authors: Keilholz Simon , Uhlenhut Henning , Gabke Andrea , García‐Schollenbruch Marlený , Kohlmann Holger 
Published: August 2023

AbstractIn the industrial production of molybdenum the reduction of molybdenum trioxide with hydrogen is a two‐step process. In order to get a deeper understanding of the chemistry involved,in situstudies were performed on the thermal behavior of molybdenum trioxide and the first reduction step to molybdenum dioxide. MoO3shows a very strong anisotropy for thermal expansion (linear expansion coefficientsαin 10−4 K−1: 1.32(4) fora, 5.5(1) forb, −0.246(5) forc). Upon heating in air, preferred orientation in XRPD patterns decreases and the color changes from grey to yellow, probably caused by decreasing oxygen vacancy concentration. The reduction of MoO3by hydrogen was investigated viain situX‐ray powder diffraction for varying heating rate, hydrogen flow and potassium content. The formation of the intermediateγ‐Mo4O11shows a higher rate for increasing potassium content; it does not play a role whether potassium is present in the starting material MoO3or in MoO2formed in the reaction. The high‐temperature modification of K2MoO4was found to crystallize in the α‐K2SO4type (P63/mmc,a=6.3463(2) Å,c= 8.1331(2) Å). Heating up MoO3in vacuum (1 Pa) with the sameT,tprotocol as above yields MoO2even without the presence of hydrogen.
An influence of radiation and magnetohydrodynamic flow of hybrid nanofluid past a stretching/shrinking sheet with mass transpiration
Authors: Maranna Thippaiah , Mahabaleshwar Ulavathi Shetter , Ravichandra Nayakar Sunnapagutta Narasimhappa , Sarris Ioannis , Souayeh Basma 
Published: August 2023

AbstractThis research focuses on energy convention and mass transpiration in magnetohydrodynamic hybrid nanofluid (Al2O3–Cu) flows driven by a moving surface, which build numerous applications such as inducing hypothermia in cancer tumors, reducing bleeding in severe injuries, and performing magnetic resonance imaging are only a few medical applications applying magnetohydrodynamics A similarity transformation describes the representational construction of the steady two‐dimensional nonlinear partial differential equations (PDEs) to a set of nonlinear ordinary differential equations (ODEs). Above equations subject to corresponding boundary conditions are analytically solved. Specifically, the energy equation with radiation effect is solved analytically using incomplete Gamma function. Moreover, the graphs included physical representations of the measurement can be found in this paper. In summary, our findings demonstrate that mass‐transfer induced slip has a non‐negligible impact on flows driven by a moving sheet. Mass transfer induced slip may even be able to dominate the flow driven effect of the moving sheet by changing the flow directions to flow against the sheet motion and also thermal radiation parameter increases as thermal boundary layer increases.
Gravitational form factors of a kink in 1 + 1 dimensional ϕ4 model
Authors: Ito Hiroaki , Kitazawa Masakiyo 
Published: August 2023

Abstract
We calculate the one-loop correction to the distribution of energy-momentum tensor around a kink in 1 + 1 dimensional ϕ4 model. We employ the collective coordinate method to eliminate the zero mode that gives rise to infrared divergence. The ultraviolet divergences are removed by vacuum subtraction and mass renormalization. We obtain an analytic result that is finite and satisfies the momentum conservation. The total energy of the kink obtained from the spatial integral of energy density reproduces the known result. Our result obtained on a finite space has a spatially-uniform term that is inversely proportional to the spatial length.
Threshold resummation for computing large-x parton distribution through large-momentum effective theory
Authors: Ji Xiangdong , Liu Yizhuang , Su Yushan 
Published: August 2023

Abstract
Parton distribution functions (PDFs) at large x are poorly constrained by high-energy experimental data, but extremely important for probing physics beyond standard model at colliders. We study the calculation of PDFs at large-x through large-momentum Pz expansion of the lattice quasi PDFs. Similar to deep-inelastic scattering, there are two distinct perturbative scales in the threshold limit where the matching coefficient can be factorized into a space-like jet function at scale Pz|1 − y| and a pair of heavy-light Sudakov form factors at scale Pz. The matching formula allows us to derive a full renormalization group resummation of large threshold logarithms, and the result is consistent with the known calculation to the next-to-next to leading order (NNLO). This paves the way for direct large-x PDFs calculations in lattice QCD. As by-products, we find that the space-like jet function is related to a time-like version calculated previously through analytic continuation, and the heavy-light Sudakov form factor, calculated here to NNLO, is a universal object appearing as well in the large momentum expansion of quasi transverse-momentum-dependent PDFs and quasi wave-function amplitudes.
The influence of feed rate during pilot hole drilling on screw withdrawal resistance in particleboard
Authors: Sydor Maciej , Potok Zbigniew , Pędzik Marta , Hitka Miloš , Rogoziński Tomasz 
Published: August 2023

AbstractScrew withdrawal resistance (SWR) is a metric that assesses the strength of furniture joints made with wood screws. The SWR value is influenced by several factors, such as the size of the screw, the depth to which it is embedded, the diameter of the pilot hole, and the material properties of the furniture components that are being joined together. These factors have been widely studied in the scientific literature. The objective of the research was to investigate the previously unexplored factor of a feed rate during pilot hole drilling and its influence on SWR. This study used three particleboards composed of raw pine material and urea–formaldehyde resins; the boards varied in average density (633, 637, and 714 kg/m3). Blind pilot holes with a diameter of 5 mm and depth of 25 mm were drilled in these boards using three significantly different feed rates (0.033, 0.33, and 3.33 mm/rev.). Subsequently, a confirmat-type furniture screw (7 mm major diameter, 4 mm minor diameter, 3 mm pitch) was screwed into these pilot holes. The ultimate SWR was measured with a universal testing machine. The results showed that the highest feed rate significantly decreases the SWR for all particleboards tested. This phenomenon can be attributed to the fact that a higher feed rate leads to a decreased precision in the internal surface of the pilot hole, consequently diminishing the screw’s anchoring capacity within the hole. The high feed rate, used to increase production efficiency, may significantly reduce furniture durability and usability.
Characterization of cold metal transfer and conventional short-circuit gas metal arc welding processes for depositing tungsten carbide-reinforced metal matrix composite overlays
Authors: Karimi Mohammad Reza , Wang Sheng-Hui , Jelovica Jasmin 
Published: August 2023

AbstractThis paper compares the processing characteristics of advanced CMT (cold metal transfer) and conventional GMAW-S (gas metal arc welding with short-circuit metal transfer) processes for depositing Ni-WC MMC (nickel-based metal matrix composites reinforced with WC) overlays. In contrast to common expectations, advanced CMT technology with mechanically assisted droplet transfer could not demonstrate significant advantages over the GMAW-S process; on the contrary, CMT exhibits marginal disadvantages in terms of carbide transfer efficiency, volume fraction of retained WC, and deposition rate. Some carbides originally contained in the core of the feed wire are blown away and expelled out of the processing zone leading to physical losses of WC particles during the deposition processes, which is more significant for the CMT process owing to much higher waveform cycle frequency and cyclic feed wire retractions. CMT exhibits superior waveform stability, better control over penetration depth, marginally lower dilution level, and exceptional arc stability. The main parameters affecting carbide transfer efficiency and volume fraction of retained WC are wire feed speed and travel speed for both processes; increased wire feed speed and travel speed generally lead to decreased carbide transfer efficiency and reduced volume fraction of retained WC. Shielding gas may have different effects on the outcomes for the CMT and GMAW-S processes. CMT overlays show comparatively higher W and lower Fe concentration in the matrix, while GMAW-S overlays show a higher concentration of Fe in the matrix (due to elevated dilution level) with marginally higher matrix microhardness and more herringbone-like secondary carbide precipitates.
The weakening of the tropical circulation is caused by the lifting of the tropopause height
Authors: Fan Chen-Shuo , Dommenget Dietmar 
Published: August 2023

AbstractIn this study we analyse the physical processes causing the weakening of the tropical circulation in the Coupled Model Intercomparison Project 6 (CMIP6). We apply a diagnostic model for the large-scale tropical circulation (vertical motion) based on the moist static energy for the first baroclinic mode (MSEB) and evaluate the sensitivity of the tropical circulation changes to the changes in advection of moisture and heat, the net radiation, the moist static stability, the baroclinic mode, and to the height of the tropopause. Based on the CMIP6 model simulations we find that the tropical circulation weakens by about 10-15% over the twenty-first century. The analysis of the MSEB model suggests that the primary cause for this weakening of the tropical circulation is the lifting of the tropopause height. This effect is fairly uniform throughout the tropics and present in all model simulations. The tropopause height increase shifts the first baroclinic mode away from lower levels with unstable air masses into high levels of the troposphere where stable air masses lead to a stabilisation of the large-scale circulation. Other factors such as changes in the advection of moisture and heat, increased net heating or increased instability of the lower tropospheric gross moist stability do have strong regional differences, and mostly increase tropical circulations, counteracting the weakening caused by the lifting of the tropopause.
Jumping to conclusions bias, psychosis and impulsivity in early stages of Parkinson’s disease
Authors: Pachi Ioanna , Papadopoulos Vassilis , Xenaki Lida Alkisti , Koros Christos , Simitsi Athina Maria , Bougea Anastasia , Bozi Maria , Papagiannakis Nikos , Soldatos Rigas Filippos , Kolovou Dimitra , Pantes George , Scarmeas Nikolaos , Paraskevas Georgios , Voumvourakis Konstantinos , Potagas Constantin , Papageorgiou Sokratis G. , Kollias Konstantinos , Stefanis Nikos , Stefanis Leonidas 
Published: August 2023

Abstract
Objectives
The aim was to explore the correlations between Jumping to Conclusions (JtC) tendency and neuropsychiatric features in patients with early Parkinson’s disease (PD).

Background
According to few reports, PD patients with impulsive–compulsive behaviors (ICBs) are prone to working memory difficulties including JtC bias. The correlation of psychotic features and JtC tendency remains still unclear.

Methods
Healthy controls and patients within 3 years of PD onset were recruited. Participants were examined for psychotic symptoms using a 10 question PD-specific psychosis severity scale. JtC was measured by a probalistic reasoning scenario (beads task). In PD group, medication use, motor and non-motor symptoms were documented. Impulsivity was evaluated using the Questionnaire for Impulsive–Compulsive Disorders in PD (QUIP).

Results
The prevalence of JtC bias was 9% (6/70) in healthy individuals, compared to 32% (22/68) of PD group [p = 0.001]. No association was detected between the presence of JtC tendency and PD-associated psychosis (p = 0.216). Patients with JtC had shorter duration of PD, more tremor-dominant PD subtype and higher QUIP scores, regardless of the dopaminergic therapy (p = 0.043, p = 0.015, p = 0.007, respectively). A trend towards attention and inhibition control deficit was noticed in JtC patients.

Conclusions
We found a high prevalence of JtC bias in early, cognitively intact PD population and a potential link between subthreshold ICBs and poor performance on beads task. Additional studies are needed to confirm our results and elaborate on the mechanisms that correlate impulsivity with JtC tendency, which are likely to be different from those mediating psychotic features in early PD.