bluuebunny/crossref_metadata_2025_split huggingface dataset:
Efficient removal of safranin from aqueous solution using a new type of metalated highly self-doped polyaniline nanocomposite
Authors: Hassan Hammed H. A. M. , Fattah Marwa Abdel 
Published: November 2022

Abstract

We report the chemical synthesis of poly(aniline-co-aniline-2,5-disulfonic acid)) in a composite containing L-hexuronic acid and metallic Ag/SiO2 nanoparticles as a new anionic polyelectrolyte for removing safranin dye. The composite was characterized by IR, UV, cyclic voltammetry, SEM, TEM, TGA, DSC, EDXS and elemental analyses. Microscopic images of the metallic nanospheres exhibited well-separated spherical particles, while the targeted nanocomposite displayed intensified spherical particles that were dispersed over almost the entire surface. The XRD exhibited peaks of amorphous silica and crystalline silver at many 2q values, and their interatomic spacing values (d) and crystallite (grain) sizes were calculated. The thermal degradation curves exhibited interesting models of stability of copolymers and their weight losses left more than 50% as a residue. The cyclic voltammograms exhibited characteristic redox peaks relative to the quinoid ring transition states. Experimental parameters such as pH, adsorbent dose, contact time, and dye concentration were studied to evaluate the efficiency of copolymers as safranin adsorbents. The uptake rates up to 82.5% adsorption were completed within 75 min and the equilibrium time was 45 min. The adsorption maximum removal values were 73.6% and 59.3% at pH 9, while the maximum removal percentages were 55% and 68.3% attributed to overcrowding of adsorbent molecules that prohibit dye/adsorbent binding. From the Langmuir and Freundlich isotherm models used to interpret the dye/adsorbent interaction, the former isotherm was the optimum to represent the dye uptake. Different kinetic models to study adsorbent capacity through chemisorption and physisorption were also investigated.
Blastocystis in raw vegetables from street markets in northern Thailand
Authors: Jinatham Vasana , Wandee Thanawat , Nonebudsri Chadsiri , Popluechai Siam , Tsaousis Anastasios D. , Gentekaki Eleni 
Published: November 2022

Abstract
Blastocystis is a stramenopile protist of controversial pathogenicity. The organism colonizes a broad range of vertebrate and invertebrate hosts. Blastocystis has also been found in the environment both in water and soil. Several routes of transmission have been proposed including human-to-human, animal-to-human and via contaminated food and water. In recent years, the presence of Blastocystis in vegetables has started to be explored. However, most studies have focused on microscopic detection. Moreover, works of this type from Asia are barely available. Hence, the aim of this preliminary study was to examine the occurrence of Blastocystis in raw vegetables sold in markets in northern Thailand. Fresh produce (n=20) commonly used in Thai cuisine (Lanna) was purchased from two street markets and screened for Blastocystisusing qPCR. Blastocystis was detected in 45% of the samples with the dominant subtype being ST3. Produce growing underground, such as galangal, carrot and beetroot were positive for the organism suggesting soil or inadequately composted manure as the source of contamination. To our knowledge, our study is the first to perform subtyping of Blastocystis in vegetables. Our results hint towards fresh produce being an, as yet, not widely explored, transmission route of Blastocystis in the studied community. Looking forward, large-scale investigations should on the prevalence of this and other organisms under the One Health umbrella should be undertaken.
Intraoperative pleth variability index-based fluid management therapy and gastrointestinal surgical outcomes in elderly patients: A randomised controlled trial
Authors: Wang Yu , Zhang Yue , Zheng Jin , Dong Xue , Wu Caineng , Guo Zhijia , Wu Xinhai 
Published: November 2022

Abstract
BACKGROUND
Intraoperative goal-directed fluid therapy (GDFT) has been reported to reduce postoperative complications of patients undergoing major abdominal surgery. The clinical benefits of pleth variability index (PVI)-directed fluid management for gastrointestinal (GI) surgical patients remain unclear. Therefore, this study aimed to evaluate the impact of PVI-directed GDFT on GI surgical outcomes in elderly patients.
METHODS
This randomised controlled trial was conducted in two university teaching hospitals from November 2017 to December 2020. In total, 220 older adults undergoing GI surgery were randomised to the GDFT or conventional fluid therapy (CFT) group (n = 110 each). The primary outcome was a composite of complications within 30 postoperative days. The secondary outcomes were cardiopulmonary complications, time to first flatus, postoperative nausea and vomiting, and postoperative length of stay.
RESULTS
The total volumes of fluid administered were less in the GDFT group than in the CFT group (2.075 L versus [vs.] 2.5 L, P = 0.008). In intention-to-treat analysis, there was no difference in overall complications between the CFT group (41.3%) and GDFT group (43.0%) (odds ratio [OR] = 0.935; 95% confidence interval [CI], 0.541–1.615; P = 0.809). The proportion of cardiopulmonary complications was higher in the CFT group than in the GDFT group (19.2% vs. 8.4%; OR = 2.593, 95% CI, 1.120–5.999; P = 0.022). No other differences were identified between the two groups.
CONCLUSIONS
Among elderly patients undergoing GI surgery, intraoperative GDFT based on the simple and non-invasive PVI did not reduce the occurrence of composite postoperative complications but was associated with a lower cardiopulmonary complication rate than usual fluid management.
Trial Registration:
This trial was registered with the Chinese Clinical Trial Registry (ChiCTR-TRC-17012220) on 1 August 2017.
Chemical composition and effect of essential oils of Thymus vulgaris and Origanum vulgare on adults and ovigerous masses of Pseudosuccinea columella
Authors: Ito Mitsue , Sperandio Natânia do Carmo , Silva Ygor Henrique da , Boeloni Jankerle Neves , Ignacchiti Mariana Drummond Costa , Avelar Barbara Rauta , Queiroz Vagner Tebaldi , Costa Adilson Vidal , Martins Isabella Vilhena Freire 
Published: November 2022

Abstract

Fasciolosis is a worldwide distribution zoonosis that causes great damage in ruminant breeding and has the aquatic mollusk Pseudosuccinea columella as an intermediate host. Synthetic molluscicides are the most used for control; however, they are harmful to fauna and flora. Therefore, this study aimed to evaluate the effect of essential oils from Thymus vulgaris, Origanum vulgare, and terpenecarvacrol, on adult mollusks and eggs of P. columella. Analysis of EO volatile components was carried out on a gas chromatograph equipment coupled with mass spectrometry selective detector. The studied components were diluted in concentrations of 10, 20, 40, 60, 80 and 100 ppm, and it was observed that O. vulgare at concentrations of 60, 80 and 100 ppm, carvacrol at the concentrations of 80 and 100 ppm, and T. vulgaris at a concentration of 80 ppm led to 100% mortality of mollusks. All concentrations the substances tested showed 100% ovicidal activity.
Econometric Analyses of Linear and Nonlinear Price Convergence of Products in 72 Indian cities and its Impact on national Economy
Authors: Ka Khnd Md Mostafa 
Published: November 2022

AbstractIn exploring the inflation dynamics in India, the study employs different econometric techniques of price convergence test. Using a panel data of 72 cities covering the period of January 2003 to December 2016 across 17 product categories, the study finds that prices do tend to converge to the law of one price (LOP) in India. The study also estimates the half- lives for price convergence and finds a reasonable speed of convergence varying from two to twenty months with a median estimate of nine months. Moreover, the study divulges that transportation cost and rail networks throughout India appear to be significant determinants of price dispersion. The Exponential Smooth Transition Autoregressive (ESTAR) model reveals that 86% of the Indian city exhibit price convergence towards one price either in linear or nonlinear fashion. In summary, this empirical study provides strong evidence in favour of the view that regional markets have been increasingly integrating in India over time. JEL: C10, C50, E31, E60
Numerical investigation of a novel bidirectional composite vibratory finishing
Authors: Yang Yingbo , Li Wenhui , Wang Xiuzhi , Hao Yupeng , Yang Shengqiang , Li Xiuhong 
Published: November 2022

Abstract
Given the poor accessibility of the current finishing process for parts with complicated geometries, a novel bidirectional composite vibratory finishing (BCVF) approach is presented, which combines the power actions on abrasive particles and processed workpieces. The discrete element method (DEM) was used to obtain a fundamental understanding of the BCVF process. By comparing different processes, it has been demonstrated that the BCVF promotes the mobility of abrasive particles to improve the finishing results and efficiency further. The characteristics of normal and tangential contact on the surface of the workpiece involved in the BCVF process were analyzed. Meanwhile, the effects of container size (or wall effects), media amount, workpiece position, and vibration parameters (including vibration amplitude and frequency) on the media-component interactions were systematically studied. The results show that the distance between the workpiece and the container wall in the y-direction can be reduced to 4d (d is the abrasive particle diameter) without affecting the finishing effect. In addition, with the enhancing vibration in the x-direction, particle impact and shear effects are subsequently strengthened. In contrast, the media amount above the workpiece and the z-directional vibration is mainly effective for the shear effect. Overall, the process can enhance the impact and shear effects simultaneously through composite vibration.
Cobalt-doped double-layer α-Fe2O3 nanorod arraysfor enhanced photoelectrochemical reduction of Cr(Ⅵ)
Authors: Bai Long , Wang Jueyu , Cui Daizong , Zhao Min 
Published: November 2022

Abstract
Element doping is one of the most important methods for improving the performance of photoelectrochemical (PEC) cells. It can change the electronic structure of the catalyst and the separation of the photogenerated charges and increase the carrier density, and thus energy density of the electrode materials. In this study, a Co-doped α-Fe2O3 double-layer electrode was prepared using a two-step hydrothermal method. Scanning electron microscope (SEM) showed that double-layer nanostructures were successfully deposited on a fluorine-doped tin oxide (FTO) substrate using this approach. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) showed that the doping did not materially change the morphology of the nanostructures, while diffuse reflectance spectrum (UV-vis DRS) showed that there were only slight changes to the flat bandgap. Electrochemical tests showed that doping greatly improved the current density irrespective of whether the cobalt was doped in the upper or the lower layer. The best performing configuration was that of the FTO/α-Fe2O3:Co/α-Fe2O3 electrode, which achieved a current density of 1.37 mA/cm2. The Co-doped double-layer α-Fe2O3 nanorod arrays proved to possess a high photoelectric synergistic ability for the reduction of Cr (VI) in an aqueous solution, with 84.85% reduction in 180 min. Under the influence of the electric field inside the double-layer electrode, the photoexcited electrons and holes are transferred to the surface of the FTO substrate and the photoanode, increasing the current density. This study offers an alternative approach for designing novel photoanodes with improved PEC performance by engineering the electron density distribution and band structure for efficient carrier separation.
Dynamic detection of water in a working face floor using cross-inclined borehole Electrical Resistivity Tomography (ERT)
Authors: Gao Weifu , Wu Pengzheng , Wang Lidong , Wang Kewei 
Published: November 2022

Abstract
A dynamic detection system was established by cross-inclined borehole electrical resistivity tomography (ERT), in order to monitor the water flow in Ordivician limestone (0LS) during development process of working face. The following approaches were adopted by the detection system. First, two inclined boreholes were constructed in the transportation roadway, and the metal joints of the cables were coupled to the surrounding rock of the boreholes by attaching the cables to metal sheets and grouting. Second, with a self-designed cable protection device, the cables were led out of the borehole to prevent the cables from being damaged by high-pressure grouting. Finally, supporting trenches were established in the transportation tunnel to prevent the cables from breaking down due to the falling of rock from the roof. During the development process of working face, data were acquired in five times. Combined with the distribution of the mine pressure and hydrogeological conditions, the abnormal areas with a low resistivity were accurately interpreted from the detection results, providing an early warning for the water inrush events from the floor.
Exploring potential soybean bradyrhizobia from high trehalose-accumulating soybean genotypes for improved symbiotic effectiveness in soybean
Authors: Bharti Abhishek , Maheshwari Hemant S. , Garg Shivani , Anwar Khalid , Pareek Ashwani , Satpute Gyanesh , Prakash Anil , Sharma Mahaveer P. 
Published: November 2022

Abstract
Drought is the most important factor limiting the activity of rhizobia during N-fixation and plant growth. In the present study, we isolated Bradyrhizobium spp. from root nodules of higher trehalose accumulating soybean genotypes and examined for moisture stress tolerance on a gradient of polyethylene glycol (PEG 6000) amended in yeast extract mannitol (YEM) broth. In addition, the bradyrhizobial strains were also evaluated for symbiotic effectiveness on soybean. Based on 16S rDNA gene sequences, four bradyrhizobial species were recovered from high trehalose accumulating genotypes, i.e., two Bradyrhizobium liaoningense strains (accession number KX230053, KX230054) from EC 538828, PK-472 respectively, one Bradyrhizobium daqingense (accession number KX230052) from PK-472, and one Bradyrhizobium kavangense (accession number MN197775) from Valder genotype having low trehalose. These strains, along with two native strains viz., (Bradyrhizobium japonicum (JF 792425), Bradyrhizobium liaoningense (JF 792426), and one commercial rhizobium, were studied for nodulation, leghaemoglobin, and N-fixation abilities on soybean under sterilized sand microcosms conditions in a completely randomized design. Among all the strains, D-4A (B. daqingense) followed by D-4B (B. liaoningense) were found to have significantly higher nodulation traits, acetylene reduction assay (ARA), when compared to other strains and commercial rhizobia. The bradyrhizobia isolated showed plant-growth promotion traits such as Indole acetic acid (IAA) production, exopolysaccharide production (EPS), phosphate solubilizing potential, siderophore, and proline. The novel species B. daqingense was reported for the first time from Indian soil and observed to be a potential candidate strain and should be evaluated for conferring drought tolerance in soybean under simulated stress conditions.
Studies on Re-188 labeling and in vivo distribution of magnetic nanoparticles with different morphologies and sizes
Authors: Huang Xiaocui , Zhao Bo , Yang Yuxiang , Yuan Hongming , Yao Pingping , Carlini Riccardo , Huang Yan 
Published: November 2022

Abstract
There has been few research on the affect and distribution of different shapes of nanoparticles inside an organism during extraction and drug targeting. In order to obtain the distribution of magnetic nanoparticles with different morphology and size in vivo, a general method of Re-188 labeled Magnetic Core-Shell Nanoparticles (MNPs) Materials was developed. Based on the prepared magnetic particles with three different morphologies and sizes, including 230 nm spherical Fe3O4@SiO2 particles (S-230), 100 nm spherical Fe3O4@SiO2 particles (S-100) and peanut shaped Fe3O4@SiO2 particles (P-180,the length of the short axis is about 100 nm and the length of the long axis is about 180 nm),the aminated MNPs were labeled with radionuclide Re-188 through the coupling of diethylenetriamine pentaacetic anhydride (DTPAA). The nuclide Re-188 was labeled to investigate their distribution behavior in mice. Most of the small-size particles S-100 can be separated from the capture of the endothelial reticular system and removed by renal metabolism. Most of the larger particles, S-230 and P-180, will be captured by the endothelial reticular system, and the nanoparticles P-180 with large aspect ratio are easier to be captured by the tissue in the spleen and enter the cells through endocytosis.
Cost and Efficiency Analysis in Iranian Primary Health Centers: A Micro Costing and Data Envelopment Analysis
Authors: Mahboub-Ahari Alireza , Khanlari Somayeh , Yusefzadeh Hasan , Ghorbani Alireza 
Published: November 2022

Abstract
Background: As the first experience in Public-Private Partnerships, the Health Complex Model was implemented to provide primary health care services in urban, especially in slum areas. As a pilot at a provincial level, Chamran Health Complex offers healthcare for more than 57000 residents of Tabriz, the capital city of East Azerbaijan province. Despite the necessity of cost information in healthcare decision-making, there was limited knowledge about the unit cost of services. This study aims to analyze the cost and efficiency of Health Centers affiliated with Chamran Health Complex.
Methods: Activity-Based Costing method with direct and step-down allocation methods was adopted. Service throughput was gathered from the Iranian Integrated Health Record Portal and cost information from organization accounting records. We estimated unit costs in a hypothetical scenario according to national standards to quantify the gap between current and standard practice. Input-oriented Data Envelopment Analysis was administered to measure the efficiency of health centers.
Results:The total cost of the complex was $2841897, of which 67% ($1910373) and 33% ($931523) were accounted for direct and indirect costs, respectively. Among 80 service types, the vaccination center had the lowest ($9), and the occupational health center had the highest average unit cost ($76). The average technical efficiency of the health centers was 0.519, where the HC1 and HC3 showed the best performance compared to their counterparts.
Conclusions: There is remarkable variability in service costs across health centers, which must be addressed in performance management and contracting practices. Although we found a gap between current and standard practice in terms of staff and facilities according to national standards, Chamran Health Complex has an untouched capacity that can be utilized with better planning and without incurring additional costs. It raises the need for revising national standards by the Iran Ministry of Health.
Workload Analysis and Prediction of Multi-type GPU in Heterogeneous GPU Clusters
Authors: Wang Sheng , Chen Shiping , Shi Yumei 
Published: November 2022

Abstract
Heterogeneous GPU clusters play an important role in processing parallel applications and massive data sets in the cloud platform. However, due to the diversity of GPU types, how to effectively allocate various GPU types is a challenge. This paper first analyzes the characteristics of request and allocation for various GPU types based on Alibaba cluster data. Then we propose a method to adaptively select the best model to predict demand of various GPU types, and feature extraction from the best model. Further, we design a model based on Long Short Term Memory (LSTM) to forecast allocation of each GPU type. Finally, the extensive experimental results demonstrate the promising performance compared with multiple baseline methods by using real-world trace data from Alibaba cloud data centers. The trial illustrates that the demand prediction accuracy of the adaptive selection method reaches 87%, while the proposed prediction allocation model yields better performances with root mean square error and mean absolute error of 1.78 and 0.85, respectively.
LuGre or not LuGre
Authors: Rill Georg , Schaeffer Thomas , Schuderer Matthias 
Published: November 2022

Abstract
The LuGre model is widely used in the analysis and control of systems with friction. Recently, it has even been made available in the commercial multibody dynamics simulation software system Adams. However, the LuGre model exhibits well-known drawbacks like, too low and force rate dependent break-away forces, drift problems during sticking periods, and significant differences in non-stationary situations between the pre-defined friction law and the one produced by the LuGre model. In the present literature, these problems are supposed to come from the model dynamics or its nonlinear nature. However, most of these drawbacks are not simple side effects of a dynamic friction model but are caused in the LuGre approach, as shown here, by a too simple and inconsistent model of the bristle dynamics. Standard examples and a more practical application demonstrate, that the LuGre model is not a “what you see is what you get” approach. A dynamic friction model with accurate bristle dynamics and consistent friction force is set up here. It provides insight into the physical basis of the LuGre model dynamics. However, it results in a nonlinear and implicit differential equation, whose solution will not be easy because of the ambiguity of the friction characteristics. The standard workaround, a static model based on a simple regularized characteristics, produces reliable and generally satisfactory results, but definitely cannot maintain stick. The paper presents a second order dynamic friction model, which may serve as an alternative. It can maintain stick and produces realistic and reliable results.