bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANALISA E-SERVICE QUALITY TERHADAP REPURCHASE INTENTION MELALUI CUSTOMER E-SATISFACTION SEBAGAI VARIABEL INTERVENING PADA PEMBELIAN ONLINE DI ZALORA INDONESIA
Authors: Kurniawan Irene Chiquita , Remiasa Marcus 
Published: April 2022

The development of e-commerce is increasing in Indonesia which has caused people to switch to making transactions through e-commerce. This research aims to analyze the effect of e-service quality on repurchase intention through customer e-satisfaction as an intervening variable on online purchases at Zalora Indonesia. This research uses quantitative methods. The sampling technique used was purposive sampling. The respondents of this research are consumers who have made transactions more than once. The data is processed using the structural model equation approach with the Partial Least Square technique. The results of this research indicate that e-service quality affects customer e-satisfaction. Customer e-satisfaction affects repurchase intention and e-service quality. E-service quality influences repurchase intention through customer e-satisfaction.
Abstrak
Pimpinan perusahaan memiliki tanggung jawab meningkatkan kinerja karyawan dengan meningkatkan keterlibatan karyawan pada pekerjaan. Gaya kepemimpinan yang tepat dinilai akan mampu meningkatkan kinerja karyawan karena menyebabkan karyawan merasa termotivasi. Tujuan penelitian ini adalah menjelaskan pengaruh servant leadership terhadap kinerja karyawan melalui employee engagement pada Restoran Shaburi & Kintan Buffet di Surabaya. Jenis penelitian adalah penelitian kuantitatif, variabel penelitian meliputi: servant leadership, employee engagement, dan kinerja karyawan. Jumlah sampel sebanyak 60 karyawan. Teknik pengumpulan data menggunakan kuesioner. Teknik analisis data menggunakan structural equation model dengan program PLS. Temuan penelitian ini menunjukkan: servant leadership berpengaruh secara langsung terhadap employee engagement, tetapi tidak berpengaruh secara langsung terhadap kinerja karyawan. Employee engagement berpengaruh secara langsung terhadap kinerja karyawan. Employee engagement adalah variabel yang memediasi pengaruh servant leadership terhadap kinerja karyawan.
Metal‐Free Boron/Phosphorus Co‐Doped Nanoporous Carbon for Highly Efficient Benzyl Alcohol Oxidation
Authors: Meng Juan , Tong Zhihan , Sun Haixin , Liu Yongzhuang , Zeng Suqing , Xu Jianing , Xia Qinqin , Pan Qingjiang , Dou Shuo , Yu Haipeng 
Published: April 2022

AbstractAn in‐depth understanding of the electronic structures of catalytically active centers and their surrounding vicinity is key to clarifying the structure–activity relationship, and thus enabling the design and development of novel metal‐free carbon‐based materials with desired catalytic performance. In this study, boron atoms are introduced into phosphorus‐doped nanoporous carbon via an efficient strategy, so that the resulting material delivers better catalytic performance. The doped B atoms alter the electronic structures of active sites and cause the adjacent C atoms to act as additional active sites that catalyze the reaction. The B/P co‐doped nanoporous carbon shows remarkable catalytic performance for benzyl alcohol oxidation, achieving high yield (over 91% within 2 h) and selectivity (95%), as well as low activation energy (32.2 kJ mol−1). Moreover, both the conversion and selectivity remain above 90% after five reaction cycles. Density functional theory calculations indicate that the introduction of B to P‐doped nanoporous carbon significantly increases the electron density at the Fermi level and that the oxidation of benzyl alcohol occurs via a different reaction pathway with a very low energy barrier. These findings provide important insights into the relationship between catalytic performance and electronic structure for the design of dual‐doped metal‐free carbon catalysts.
A Solvothermal Synthetic Environmental Design for High‐Performance SnSe‐Based Thermoelectric Materials
Authors: Shi Xiao‐Lei , Liu Wei‐Di , Li Meng , Sun Qiang , Xu Sheng‐Duo , Du Du , Zou Jin , Chen Zhi‐Gang 
Published: April 2022

AbstractSnSe is challenging to use in thermoelectric devices due to difficulties in simultaneously optimizing its thermoelectric and mechanical properties. Here, the authors show a unique solvothermal synthetic environmental design to fabricate super‐large and micro/nanoporous Sn0.965Se microplates by using CrCl3. Cl− ions to trigger Sn‐vacancy formation and optimize the hole concentration to ≈3 × 1019 cm−3, while the as‐formed Cr(OH)3 colloidal precipitations act as “templates” to achieve micro/nanoporous features, leading to low lattice thermal conductivity of ≈0.2 W m−1 K−1 in the as‐sintered polycrystal, contributing to a high ZT of ≈2.4 at 823 K and an average ZT of ≈1.1. Of particular note, the polycrystal exhibits high hardness (≈2.26 GPa) and compression strength (≈109 MPa), strengthened by grain refinement and vacancy‐induced lattice distortions and dislocations; while a single‐leg device provides a stable output power (>100 mW) and conversion efficiency of ≈10% by a temperature difference of 425 K, indicating great potential for applying to practical thermoelectric devices.
Spatial patterns in U.S. hard red winter wheat quality
Authors: Chen Yikuan , Brorsen B. Wade 
Published: April 2022

AbstractHard red winter wheat (Triticum aestivum L.; HRWW) is broadly grown in Great Plains and northwestern states in the United States. Knowing how wheat quality characteristics are correlated across space may help wheat buyers locate grain elevators that have wheat with the quality characteristics they need. The objective of this study was to determine the spatial pattern of quality factors of HRWW. Mixed effects regression modeling was used to estimate mean quality characteristics for each location. These estimates are then reported in geospatial maps to illustrate the spatial pattern of quality factors. Expected local wheat quality had strong spatial correlation over a large distance. Residuals show substantial spatial correlation, which suggests that having a survey each year provides new information to wheat buyers. Geospatial maps clearly illustrate the locations in the HRWW growing region that have the primary characteristics of interest that buyers seek.
New Gd(I)/Cs(III) complexes of benzil‐based thiocarbohydrazone macrocyclic ligand: Chemical synthesis, characterization, and study their biological effectiveness as antibacterial, antioxidant, and antiviral additives for polyurethane surface coating
Authors: Eliwa Essam M. , Elgammal Walid E. , Sharaf Mohamed H. , Elsawy Maha M. , Kalaba Mohamed H. , El‐Fakharany Esmail M. , Owda Medhat E. , Abd El‐Wahab Hamada 
Published: April 2022

AbstractGerms are transmitted in different ways and remain viable or infectious on metal, glass, wood, fabrics, and plastic surfaces for prolonged periods of time. Thus, sterilizing commonly handled everyday objects and public places with high contamination potential is a major global strategy to combat the spread of pathogenic microorganisms. Consequently, our response is development of durable surface‐active coating embedded with new Gd(I)/Cs(III) complexes that derived from condensation of thiocarbohydrazide and benzil precursors. Chemical structures of these complexes were elucidated by Fourier transform infrared (FTIR), electron impact ionization (EI‐MS), 1H nuclear magnetic resonance (NMR), elemental analysis, and scanning electron microscopy (SEM). Next, the well‐established complexes were physically mixed with wide‐range applicable polyurethane (PU) varnish as potential biocide agents. With laboratory scale, coating material was loaded into stainless steel and wood panels to evaluate the physical and mechanical properties. In comparison with the blank formulation, our additives enhanced the gloss levels of the developed PU from 75 to 80 gloss unit (GU), and the scratch hardness was increased to reach >2 kg. Meanwhile, all the coated films passed the flexibility bend test and showed none flaking in mechanical adhesion test. Consequently, Gd(I) and Cs(III) metal complexes did not show any undesirable side effects on PU coating performance. Concerning biological screening, macrocyclic Gd(I) and Cs(III) complexes as well as the reformulated PU varnish were assayed for their antibacterial, antioxidant, and antiviral activities. Antibacterial activity of the developed PU was slightly increased than the individual treatments of Gd(I)/Cs(III) complexes by 1–2 mm, although the blank PU showed no obvious activity against all the tested bacterial strains. Antiviral overall results indicated that the Gd(I) and Cs(III) complexes demonstrated higher activity than the developed PU samples against ADeno‐7, CV‐B4, and HSV‐1 viruses in all modes of action, and hence these coordinated compounds could be promising virucidal agents with good biocompatibility.
Facile Synthesis of SnNb2O6@C Composite with Ultrathin Carbon Layer as Anode Materials for High‐Performance Sodium‐Ion Batteries
Authors: Liu Tao , Yin Xuemin , Yin Xiuping , Cheng Shuling , Wang Xuan , Zhao Yufeng 
Published: April 2022

AbstractNiobium‐based oxides have attracted a lot of attention as anode materials for sodium‐ion batteries (SIBs) due to their high theoretical specific capacity, excellent rate capability and exceptional safety. However, their poor intrinsic electronic conductivity and sluggish sodium ions diffusion kinetics severely hinder their practical applicability. Here, SnNb2O6@C was successfully prepared by a simple solid‐state reaction technique coupled with carbon coating. HRTEM images show that the SnNb2O6@C particles are covered with uniformly ultrathin amorphous carbon layer of about 1.8 nm, thus improving the electronic conductivity and diffusion coefficient of sodium ions. As anode for SIBs, the as‐obtained SnNb2O6@C material exhibits excellent specific capacity (369 mAh g−1 at a current density of 50 mA g−1) and remarkable rate performance (177 mAh g−1 at 1000 mA g−1), which indicates its good prospect in practical application.
The opposite response of the South Asian high to increasing CO2 at different heights
Authors: Qu Xia , Huang Gang , Hou Hongyu , Chen Zesheng , Du Yan 
Published: April 2022

AbstractBased on the multimodel ensemble of 22 models in Coupled Model Intercomparison Project Phase 6 (CMIP6), the present manuscript found that in response to increasing CO2, the South Asian high (SAH) displays the opposite response over its southern region in the upper troposphere: an anticyclonic response at 100 hPa and a weak (insignificant) cyclonic response at 200 hPa. This opposite response is a product of tropospheric warming. In response to increasing CO2, the troposphere warms, with the potential temperatures peaking at 150–200 hPa over the northern Indian Ocean (IO). With transportation by local vertical motion (ascendance over the northeastern IO and descendance over the northwestern IO), various changes in vertical temperature advection with height form at 100 and 200 hPa. Finally, the changes contribute to a decrease in the ω response with pressures at 100 hPa but an increase in the ω response with pressures at 200 hPa over the northwestern IO. Over the northwestern IO, ω change is inversely related to pressure. At 100 hPa, the sign of ω changes with pressure, which yields distinct vorticity forcing over the northeastern and northwestern IO. This causes an anticyclonic response, which may generate zonal vorticity advection and balance the vorticity forcing. At 200 hPa, the contribution is roughly opposite to that at 100 hPa. In addition, although diabatic heating contributes to the vertical profile of ω, it yields the same‐sign vorticity response at 100 and 200 hPa.
Ionic Conductivity versus Particle Size of Ball‐Milled Sulfide‐Based Solid Electrolytes: Strategy Towards Optimized Composite Cathode Performance in All‐Solid‐State Batteries
Authors: Cronau Marvin , Duchardt Marc , Szabo Marvin , Roling Bernhard 
Published: April 2022

AbstractFor the fabrication of high‐energy and high‐power all‐solid‐state batteries (ASSBs), easily synthesizable solid electrolytes are needed, which enable fast ion transport inside the composite cathode as well as good contacts between cathode active material and solid electrolyte particles. Regarding the latter, the size ratio of the particles inside the composite cathode has to be optimized. Here, we use a wet ball milling process for the synthesis of agyrodite‐type Li5.5PS4.5Cl1.5 solid electrolyte particles and study the influence of milling time on particle size and ionic conductivity. With longer milling time, both the solid electrolyte particle size and the ionic conductivity decrease, which exert an opposing influence on the cathode performance. We show that a milling time of approximately 2 h leads to an optimum cathode performance, as this time is sufficient for a favorable particle size ratio, while a strong drop of the ionic conductivity of Li5.5PS4.5Cl1.5 is avoided.
Facile synthesized NaGdF4:Yb,Er peanut‐shaped, highly biocompatible, colloidal upconversion nanospheres
Authors: Ansari Anees A. , Labis Joselito P. , Khan Aslam 
Published: April 2022

AbstractA facile method was used for the synthesis of peanut‐shaped very emissive NaGdF4:Yb, Er upconversion nanospheres (UCNSs) at lower temperatures with uniform size distribution. Crystallographic structure, phase purity, morphology, thermal robustness, biocompatibility, colloidal stability, surface chemistry, optical properties, and luminesce properties were explored by X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), zeta potential, thermogravimetric/differential thermal analysis (TGA/DTA), Fourier‐transform infrared (FTIR), ultraviolet (UV)‐visible and photoluminescence spectroscopic tools. XRD pattern verified the construction of a single‐phase, highly‐crystalline NaGdF4 phase with a hexagonal structure. Peanut‐shaped morphology of the sample was obtained from SEM micrographs which were validated from high‐resolution TEM images, to have an equatorial diameter of 170 to 200 nm and a length of 220 to 230 nm, with irregular size, monodispersed, porous structure, and rough surface of the particles. The positive zeta potential value exhibited good biocompatibility along with high colloidal stability as observed from the absorption spectrum. The prepared UCNSs revealed high dispersibility, irregular size peanut‐shaped morphology, rough surface, good colloidal stability, and excellent biocompatibility in aqueous media. A hexagonal phase NaGdF4 doped with ytterbium (Yb) and erbium (Er) UCNSs revealed the characteristics of highly dominant emissions located at 520–525, 538–550, and 659–668 nm corresponding to the 2H11/2 → 4I15/2, 4S3/2 → 4I15/2, and 4F9/2 → 4I15/2 transition of Er3+ ions, respectively, as a result of energy transfer from sensitizer Yb3+ ion to emitter Er3+ ion.
A novel colorimetric fluorescent probe for detecting hydrazine in living cells and zebrafish
Authors: Zhao Zhenhua , Xing Liting , Feng Quanlin , Han Lin 
Published: April 2022

AbstractHydrazine (NH2NH2) is a highly toxic organic substance that poses a threat to human health. Monitoring hydrazine with high sensitivity and selectivity is very important. Here, a simple colorimetric fluorescent probe for hydrazine detection, which is a seminaphthorhodafluor derivative containing thiophene‐2‐carboxylic acid ester reaction site, was rationally constructed. The probe itself exhibits weak fluorescence. The fluorescence is significantly enhanced when hydrazine is added. The probe exhibited a broad linear range (0–1 mM) with satisfactory selectivity and sensitivity (limit of detection 36.4 μM), which turned out to be an excellent fluorescent probe for monitoring hydrazine. Additionally, the probe was used to track hydrazine in living cells and zebrafish with great success, and the detection performance was satisfying. These results proved that this type of fluorescent probe with the thiophene‐2‐carboxylic acid ester structure can detect hydrazine with higher selectivity and sensitivity.
Facile titanium(IV) chloride and TBD‐mediated synthesis of N‐aryl‐substituted azacycles from arylhydrazines
Authors: Tran Van Hieu , Hong Wan Pyo , Kim Hee‐Kwon 
Published: April 2022

AbstractA novel practical synthesis of N‐aryl‐substituted azacycles from arylhydrazines is described. In this method, target azacycles were prepared via reaction of arylhydrazines with cyclic ethers in the presence of both titanium(IV) chloride and 1,5,7‐triazabicyclo[4.4.0]dec‐5‐ene (TBD) as key combined reagents. Using this synthetic protocol with titanium(IV) chloride and TBD, reaction of arylhydrazines with cyclic ethers successfully afforded various N‐aryl‐substituted azacycles in high yield. This facile synthetic method using arylhydrazines will be a promising guide for the synthesis of azacycles from arylhydrazines.
An undergraduate laboratory to detect viruses in human DNA samples using qPCR
Authors: Militello Kevin T. , Nedelkovska Hristina 
Published: April 2022

AbstractThe COVID‐19 pandemic has necessitated the need to reliably detect the presence of viral genomes in human clinical samples. The most accurate viral tests involve the use of qPCR. Thus, it is important for students to understand the mechanism to detect viral genomes by qPCR including critical qPCR controls and how to properly interpret qPCR data. Herein, we describe a 2‐week undergraduate laboratory to detect a viral genome in a human DNA sample. The strategy follows a SARS‐CoV‐2 qPCR test in numerous ways. Students are provided isolated DNA representing a mock human patient sample, and determine if a viral genome (bacteriophage lambda) is present using qPCR. A battery of control samples and patient pooling strategies are utilized. The laboratory exercise is successful based on high rates of student success in detecting viral genomes, pre‐quiz and post‐quiz assessments focusing on viral qPCR testing, and positive student comments.
Psychogenic nonepileptic seizures: clinical characteristics and outcome
Authors: Volbers Bastian , Walther Katrin , Kurzbuch Katrin , Erdmann Laura , Gollwitzer Stephanie , Lang Johannes D. , Dogan Onugoren Müjgan , Schwarz Michael , Schwab Stefan , Hamer Hajo M. 
Published: April 2022

AbstractBackgroundClinical characteristics, outpatient situation, and outcome in patients with psychogenic nonepileptic seizures (PNES) remain to be elucidated.MethodsPatients diagnosed with PNES after video‐electroencephalography (EEG) monitoring (VEM) 03/2000–01/2016 at the Erlangen Epilepsy Center were surveyed between June 2016 and February 2017. Primary outcome was PNES cessation defined as no PNES episodes within > = 12 months prior to the interview. Secondary outcome variables included quality of life (QoL) and dependency. Sensitivity analysis included patients with proven PNES during VEM without comorbid epilepsy.ResultsNinety‐nine patients were included (median age 38 (interquartile range (IQR 29–52)) years; 68 (69%) females, follow‐up 4 (IQR 2.1–7.7) years). Twenty‐eight (28%) patients suffered from comorbid epilepsy. Twenty‐five (25%) patients reported PNES cessation. Older age at symptom onset (odds ratio (OR) related to PNES cessation: 0.95 (95% CI 0.90–0.99)), comorbid epilepsy (OR 0.16 (95% CI 0.03–0.83)), anxiety disorder (OR 0.15 (95% CI 0.04–0.61)), and tongue biting (OR 0.22 (95% CI 0.03–0.91)) remained independently associated with ongoing PNES activity after adjustment. Sensitivity analysis (n = 63) revealed depressive disorder (OR 0.03 (95% CI 0.003–0.34)) instead of anxiety as independent predictor, while this seemed relevant only in patients older than 26 years at onset (OR 0.04 (95% CI 0.002–0.78) versus OR 0.21 (95% CI 0.02–1.84) in patients younger than 26 years). PNES cessation was associated with increased median QoL (8 (IQR 7–9) versus 5.5 (IQR 4–7); p < .001) and an increased frequency of financial independency (14 (56%) versus 21 (28%); p = .01).ConclusionsWe found poor outcomes in PNES especially in older patients at onset with comorbid depressive disorder. Comorbid epilepsy also seems to be a major risk factor of ongoing PNES activity, which in turn affects patients’ daily living.
Study on the reporting quality of randomized controlled trials of flipped classroom in medical education
Authors: Zhang Xiaoli , Zhang Guanran , Yuan Yao , Zhang Yanling 
Published: April 2022

AbstractWith the deepening of medical education reform, the flipped classroom has become a commonly used teaching method. Many randomized controlled trials (RCTs) have shown that flipped classroom combined with problem‐based learning improves many students' abilities. It remains unclear whether the design and reports of these RCTs comply with specifications. The aim of this study was to provide a systematic assessment of the quality of RCTs investigating the effectiveness of flipped classroom teaching in medical education. Two investigators searched PUBMED and EMBASE and analyzed 15 filtered RCTs addressing flipped classroom in medical education, published between January 1, 2016 and December 31, 2021. The overall reporting quality was assessed using the overall quality score (OQS) according to the 2010 CONSORT statement. The search revealed 15 RCTs closely related to flipped classrooms. After analysis, it appeared that least half of them made no mention of half of the OQS items in the CONSORT 2010 statement. Since the flipped classroom is an emerging teaching method, all the retrieved articles were published after 2016. Furthermore, a number of issues that we considered very important were not adequately addressed in the RCT reports. Although the CONSORT 2010 statement was issued 12  years ago, the quality and content of many RCTs are not satisfactory. Our findings suggest that authors need to make more effort to meet the CONSORT statement requirements.
Trendelenburg (Head‐Down tilt) and head rotation: Ultrasonographic effects on the internal jugular vein for catheterization safety
Authors: Hernández‐Garate Yenitzeh Ana Karen , Elizondo‐Omaña Rodrigo Enrique , Casas‐Murillo Claudio Alberto , de Luna‐Vega Raúl Antonio , Elizondo‐Riojas Guillermo , Salinas‐Alvarez Yolanda , Fernandez‐Rodarte Bernardo Alfonso , Guzman‐Lopez Santos , Quiroga‐Garza Alejandro 
Published: April 2022

AbstractMost guidelines fail to specify patient positioning during central venous catheterization. The objective was to determine the effects of head‐down tilt (Trendelenburg position) and head rotation on the internal jugular vein (IJV). A prospective, observational, longitudinal, and descriptive study using healthy adult volunteers, of both sexes, was performed. The change in position and cross‐sectional areas (CSA) of the right IJV and common carotid artery (CA) were measured by ultrasonography during Trendelenburg position (TP) (0°, 5°, 10°, and 15°) and contralateral head‐rotation (HR) (0°, 45°, and 90°) for a total of 12 positions. The neutral supine position was first, randomizing the other 11 positions, with 5‐min rest intervals in between. Vital signs and symptoms were recorded. A total of 54 volunteers were recruited between the ages of 21 and 32, of which 30 were men. Any degree of TP or HR significantly increased the CSA. The largest area obtained was 1.78 cm2 with a TP15HR90 which did not have a statistical difference with TP10HR45 1.59 cm2. A HR90 tended to displace the IJV medially, overlaying the CA. Any degree of TP or HR will significantly increase CSA or the right IJV. A 5° to 10° TP is recommended when the patient's condition allows it, with a 45° HR, without significantly displacing the IJV anterior to the CCA.