bluuebunny/crossref_metadata_2025_split huggingface dataset:
Corrosion Analysis of Shale Gas Downhole Tubing Under the Synergistic Action of Multiple Factors
Authors: Sun Ming , Cui Wei , Lin Nan 
Published: July 2023

Abstract
The downhole tubing of a shale gas block in our southwest region has been corroded to varying degrees, which has led to perforation failure, seriously affecting the normal production of gas wells, and at the same time, there are great potential safety hazards. To clarify the corrosion type and corrosion mechanism, the corrosion analysis research of downhole tubing was carried out. The research methods mainly include corrosion morphology observation, corrosion product analysis, and fluid mechanics calculation. The results show that the corrosion under the synergistic effect of scouring-CO2-SRB (Sulfate-Reducing Bacteria)-Cl-is the main corrosion type of downhole tubing in shale gas and scouring that causes damage to the pipe wall in the early stage of operation. These locations are suitable for SRB growth and enrichment, and SRB corrosion causes local corrosion: with the addition of the bactericide, the SRB corrosion stops. At this time, CO2 corrosion continues to develop at the local corrosion position that has been formed. Although it is in the CO2 corrosion insensitive range and the corrosion inhibitor is added, the formed corrosion pit makes the pre-film difficult, it is difficult to guarantee the corrosion inhibition effect. Therefore, SRB corrosion is the main corrosion in the downhole pipe section in the early stage, and CO2 corrosion is the main corrosion in the later stage. Fluid scouring such as liquid sand and gas sand and Cl- promote the occurrence and development of related corrosion.
Study On Novel Fe3O4@UiO-66@Bi2O3 Synthesis for Effective Methyl Orange Photocatalytic Degradation
Authors: Xu JingYin , Zhang HaoKun , Zhao LiRong 
Published: July 2023

Abstract
With the booming industry, the demand for dyes has increased dramatically and the discharge of wastewater containing dyes has also increased dramatically. Owing to the multi-pore nature and stabilization of UiO-66, the relatively small band gap of Bi2O3 and the good magnetic properties of Fe3O4, Fe3O4@UiO-66@Bi2O3 has good efficiency and reusability to remove methyl orange (MO). The maximum degradation rate is 83.26%, and the magnetic properties of Fe3O4 solved the problem of difficult recovery of UiO-66 as a nanomaterial with a recovery rate of 98.79%. In this work, the results showed that the Fe3O4@UiO-66@Bi2O3 catalysts composite increased the specific surface area, improved the separating efficiency of both holes and electrons as well as significantly enhanced the photo-catalytic efficiency in comparison to single Fe3O4@UiO-66 and Bi2O3@UiO-66 materials. The photocatalytic decomposition procedure is consistent with the primary reaction kinetics. The outcomes suggest that Fe3O4@UiO-66@Bi2O3 (FUB) is a strong contender for the removal of MO.
Study on the loaded morphology of active metal components in Cu-M@ carbon-based catalysts and their protection against SO2
Authors: Zhang Lingxuan , Zhao Ting , Wu Yue , Li Da , Zhao Tong , Cao Zhuo , Zhang Li 
Published: July 2023

Abstract
In this paper, the samples of metal impregnators for activated carbon were prepared by Cu compound with Co, Ni, Zn and Mo compounds, respectively. The loading forms of metal compounds on activated carbon were investigated. With the increase of calcination temperature, the crystal form of the activated carbon metal impregnant sample changes correspondingly. Under the calcination temperature of 200 °C, the sample of copper impregnator completely decomposes into copper oxide with a monoclinic crystal phase structure, and the cobalt impregnator samples decompose from CoCO3 to Co3O4. Its main component is Co3O4, with a cubic phase structure. The metallic zinc compounds decomposed completely into hexagonal zinc oxide crystals with a wurtzite structure. For the solid sample of molybdenum impregnation agent, ammonium molybdate pyrolyzed to remove all water of crystal and part of ammonium ions, and its crystal shape changed from (NH4)6Mo7O24•4H2O to (NH4)2Mo4O13. Meanwhile, the protection performance of metal-impregnated samples against sulfur dioxide was also evaluated. The evaluation results show that the two-component Cu-Ni impregnated sample had the strongest SO2 protection performance under the calcination condition of 150 °C.
Study on Preparation and Properties of Polycarboxylate Superplasticizer with Different Molecular Weight Methylallyl Polyoxyethylene Ether
Authors: Zhong Lina 
Published: July 2023

Abstract
The molecular weight of the macromonomer has a great influence on the performance of the Polycarboxylate Superplasticizer (PCE). The PCE with different structures was prepared by using methylallyl polyoxyethylene ether (HPEG) with molecular weights of 2400, 3000, 4000, and 5000. The effects of PCE on the emptying time and the rheological properties of cement paste and the properties of concrete were investigated. The test results show that the emptying time of cement paste, the plastic viscosity ratio and the emptying time ratio of concrete inverted slump have a corresponding relationship: HPEG-5000 < HPEG-4000 < HPEG-3000 < HPEG-2400, and the PCE prepared by HPEG-2400 has the best performance.
Study on the Properties of Cellulose Acetate Composite Synergistically Toughened by Glycerol Triacetate and Modified Nano Titania
Authors: Gan Huaiyin , Xu Jiangdong , He Weidong 
Published: July 2023

AbstractGlyceryl triacetate (GT) and nano titanium dioxide (TiO2) filler modified by titanate coupling agent were used to toughen cellulose diacetate to prepare CA/GT/nano TiO2@NZD-201 composites. The effects of glyceryl triacetate and modified titanium dioxide filler on the mechanical properties and rheological properties of cellulose acetate were studied. The rheological properties showed that glyceryl triacetate and modified nano TiO2 significantly increased the plasticity of the composite, reduced the complex viscosity, reduced the rigidity, and increased the viscoelastic ratio. The impact resistance of the composite was improved by 101% due to the addition of modified nano titanium dioxide.
Monte Carlo simulation study of rare earth/polypropylene composite shielding 120 KV medical X-ray
Authors: Cui Tongyan , Duan Shiyu , Chen Ruixin , Wang Rui , Jia Qingxiu 
Published: July 2023

Abstract
Rare earth is widely used as a ray shielding material due to its special electron layer structure, and Monte Carlo simulations are also widely used in ray shielding. Therefore, in this paper, based on the Monte Carlo simulation algorithm and FLUKA program, three kinds of rare earth, Gd2O3, Nd2O3, and La2O3, were selected as shielding fillers to prepare rare earth/polypropylene composite materials, and their shielding effect on X-ray at 120KV tube voltage was simulated. It is found that the three rare earths as shielding fillers have a shielding effect on X-ray under 120KV tube voltage, and Gd2O3 has the best effect on X-ray attenuation. When the thickness of the material is 0.06 cm, the shielding rate of pure Gd2O3 particles is 92.25%, and the rare earth/polypropylene composite material with a mass ratio of 1: 1 at the same thickness can also shield 32.74% of rays. Increasing the thickness of the composite or the amount of rare earth filling can improve the shielding effect of the composite, but the effect of increasing the amount of rare earth filling is more significant.
Preparation of calcium carbonate by indirect carbonation desulfurization gypsum with renewable aspartic acid
Authors: Zhu Xuechen , Gong Yuan , Wu Baizhi , Wei Hongxia , Li Chunlei 
Published: July 2023

Abstract
As an industrial by-product of flue gas desulfurization, flue gas desulfurization gypsum (FGD gypsum), whose main component is CaSO4 · 2H2O, is an ideal raw material for mineralization. The technical problem of indirect mineralization lies in the efficient recycling of leaching agents, while amino acids have the lowest solubility at their isoelectric point, and thus the mixture of amino acids can be separated by adjusting the isoelectric point. Therefore, this paper proposes the use of aspartic acid (ASP) as leaching agent to realize the recycling of leaching agent. The leaching efficiency of Ca2+ was regulated by changing the temperature, liquid-to-solid ratio, ammonia concentration, and the ratio of ASP to the amount of FGD gypsum substance. The results showed that ASP could sufficiently improve the leaching efficiency of Ca2+ from desulfurized gypsum under alkaline conditions provided by ammonia. The leaching concentration of Ca2+ was 7474.92 mg/L at 7% ammonia concentration, temperature of 30 °C, n(ASP): n(FGD gypsum) = 2.5:1, and liquid-solid ratio of 30:1 mL/g, which was 12 times higher compared with the leaching concentration of Ca2+ in pure water of 601.2 mg/L. While improving the leaching efficiency, ASP has lone electron pairs and can form soluble complexes with Ca2+ under alkaline environment, which can convert the crystalline form of the product CaCO3 to sphalerite during the mineralization process, and can regenerate ASP by adding acid to adjust the pH, and the recovery rate can reach 80.72%. This method effectively solves the problem of resource waste caused by the massive accumulation of desulfurization gypsum.
Determination of Quinoline in Textiles by High-Performance Liquid Chromatography
Authors: Fu Kejie , Ren Qingqing , Dong Wei , Liu Jun , Feng Rui , Lian Sumei , Liu Dongzhi 
Published: July 2023

Abstract
Quinoline, an important intermediate in rubber, fine chemicals, dyeing and finishing industry, is irritating to eyes and skin, and has the risk of carcinogenesis, teratogenesis and mutagenesis in organisms. At present, the research on quinoline mainly focuses on fine chemicals, pesticides, and pharmaceuticals, while the research on textiles is less. Up to now, the determination standard of quinoline content in textiles has not been issued in China and the international field. To establish a method for determination of quinoline in textiles by high-performance liquid chromatography (HPLC), the extraction conditions were optimized. The textile samples were ultrasonically extracted with acetonitrile as solvent. A 0.45 μm filter membrane was used to filter the extracts. The detection method was validated by methodology. The RSD of intra-day precision is 0.32% and the RSD of inter-day precision is 0.59%. Recoveries ranged from 90.6% to 98.9% with RSDs ranging from 0.4% to 2.14% (n=6) at low, medium and high spiked concentrations, which shows this method has stable detection results, high precision, and satisfactory recovery rate. 28 samples were tested with this method, and quinoline was detected in 1 sample, with a content of 5.3 mg/kg, which was less than the limit requirement for quinoline in 2019 OEKO-TEX Standard 100.
Solidification process analysis and parameter optimization of powder coating by electrostatic spraying
Authors: Yan Ran , Xue Bing , Yue Yongyong 
Published: July 2023

Abstract
Aiming at formulating reasonable curing process parameters of powder coating, solving the problems of over-drying of thin plate and impervious drying of the thick plate during combined drying of workpieces with different thicknesses, analyzing the optimal curing temperature range of powder coating by differential scanning calorimetry (DSC), and designing a three-factor and four-level DOE test scheme within the optimal curing temperature range to test the curing time of powder coating are necessary. Using Minitab analysis software, the significance of the influence of various factors on the powder curing time is verified and the powder coating curing process model is built on this basis. The results show that the furnace temperature and workpiece thickness have significant effects on the shortest and longest curing time of powder coating. And there is no obvious interaction between furnace temperature and heating rate. The curing process model based on this can effectively solve the drying problem of composite plates with different thicknesses and reduce energy consumption.
Design of Chitosan Derivative as Environmentally Friendly Scale and Corrosion Inhibitor in Municipal Wastewater
Authors: Gao Yuhua , Li Haihua , Liu Zhan , Zheng Yuxuan , Liu Zhenfa 
Published: July 2023

Abstract
Chitosan is a potential scale and corrosion inhibitor in municipal wastewater. But it is insoluble in water and most solvents, so its application is greatly limited. For this reason, the development of chitosan derivatives that were used in municipal wastewater to improve the dissolubility and performance of inhibition of chitosan has broad application prospects. A chitosan derivative (O-CTS-PSI) was designed. Through determining the infrared spectrum and 1H NMR spectrogram of the synthesized O-CTS-PSI, have proved that the chemical constitution. The scale inhibition rate of O-CTS-PSI could reach 100% in static scale inhibition experiment when 40 mg/L O-CTS-PSI was added in municipal wastewater. The rotating coupon corrosion test results showed that the corrosion inhibition rate of O-CTS-PSI could reach 58.4% in municipal wastewater when 100 mg/L O-CTS-PSI was used. This indicated that O-CTS-PSI was an excellent substitute for commonly used chemicals in circulating water system.
Development of Forming Limit Curve for Glare in a semi-cured state using Hydro-bulging test method
Authors: Ali Mirza Hasnain , Lang Lihui , Zhang Meng 
Published: July 2023

Abstract
Forming limit curve (FLC) is a valuable tool for predicting the formability of materials. Considering the need to develop FLC for fiber metal laminates (FMLs), Glare in a 2/1 sequence was prepared for the development of FLC. The prepreg used was glass fiber stacked in between the aluminum sheets in a semi-cured state, which allows for enhanced strain percentage and helps predict the maximum forming limit of Glare. The experimental data was accumulated by comprehensively testing parameters like pressure rate, temperature, and blank holding pressure. The results show that at higher temperatures and reduced pressure rate and blank holding pressure, the formability of Glare can be enhanced. This study helps predict the safe zone when forming Glare and manufacturing small intricate parts of Glare material in engineering applications.
A Theoretical Study on Photocatalytic Water Splitting of Boron Doped Defective Zirconium Dioxide
Authors: Zhao GuoChen , Qiu YongQing , Liu ChunGuang 
Published: July 2023

Abstract
At present, environmental crisis and energy problems are becoming more and more serious. Finding a sustainable green energy source is urgent. Solar energy has attracted widespread attention. Here, we have meticulously investigated the application of boron atom-doped defective zirconia catalysts for photocatalytic water splitting through theoretical calculations. We know that doping boron atom greatly promotes the generation of oxygen vacancy defects in the zirconia catalyst, and the boron atom-doped defective zirconia catalyst has better photocatalytic water splitting performance than the pristine zirconia catalyst. In addition, boron atom-doped defective zirconia catalysts have higher stability. Through electronic structure analysis, the photo-response in the photocatalytic water splitting system and the fundamental reasons for the improvement of catalyst stability were explored. The introduction of boron atom promoted the generation of defect impurity electronic states, which made the antibonding state of the catalyst more stable cling to the Fermi level. Finally, the great photocatalytic water splitting performance of the boron-doped defective zirconia catalyst was confirmed with the difference in Gibbs free energy in photocatalytic water splitting process.
Preparation and study of Nanocomposite material CAFe-PPy
Authors: Wang Shasha , Ren Bin , Zhang Lihui , Liu Zhenfa 
Published: July 2023

Abstract
Carbon aerogel (CA) is a new type of lightweight porous material with many excellent properties. Here, CAFe-PPy was prepared via iron and conductive polymer polypyrrole (PPy) on carbon aerogel. The physical properties of CA and CAFe-ppy were compared. Iron, nitrogen and oxygen were successfully loaded onto CAFe-PPy. PPy can increase the conductivity of CAFe-PPy, but it also blocks some holes.
Diffusion induced thermal effect and stress in layered Li (Ni0.8Mn0.1Co0.1) O2 cathode materials for button lithium-ion battery electrode plates
Authors: Tian Chongwang , Leng Xuning , Bao Chunjiang , Xu Lipeng 
Published: July 2023

Abstract
This paper develops a coupling model of the relationship between chemical reaction, temperature and stress/strain for NCM811 cathode materials. With the process of reaction, the concentration of electrolyte salts changes rapidly at the initial stage of diffusion and tends to be in dynamic equilibrium. The concentration of electrolyte LiPF6 in electrode materials diffuses from bottom to top with the process of lithium intercalation. In the process of Li-ion intercalation, the temperature rise of porous electrode materials increases sharply at first, then decreases and then increases slowly. The rate of temperature rise in the cathode material increases with the temperature decrease. Electrode material volume deformation with the expansion along the X-axis and the radial bending along the Y-axis. And the law of stress variation with time is consistent with the temperature-time curve. By the stress-strain distribution nephogram, it is found that the position where the maximum stress is located at the edge of the upper surface and is the most vulnerable to failure.
How COVID-19 altered perceived household resource consumption in the United States: Results from a survey
Authors: Shivaram Ranjitha , Azevedo Inês M L 
Published: July 2023

Abstract
The COVID-19 pandemic has led to unprecedented changes in the daily lives of people in the United States and across the world, particularly around how households consume critical resources. We fielded a survey to a national U.S. sample (n = 1214) to quantify the nature and extent of perceived change in household consumption of energy, water, information and communication technology (ICT) services, transportation, and grocery and non-grocery shopping during the COVID-19 pandemic. We find that most survey respondents report increased consumption of electricity and water, but they did not report altered heating and cooling energy consumption. Respondents reported sharp increases in work-related ICT usage for medium- and high-income respondents, and increased ICT usage for recreation and entertainment across all income categories during the pandemic. Nearly half of car-based commuters stopped commuting, with higher shares of medium- and high-income respondents shifting to working from home instead of commuting by car. Respondents shopped less frequently, spent more on both grocery and non-grocery items, and moved their shopping online—indicating that the pandemic hastened the ongoing shift to online modes of resource consumption. Low-income households and respondents of color reported different shifts in consumption in comparison to higher income households and white households. Finally, more than half of our respondents stated that their altered consumption patterns will persist post-pandemic, pointing to potential long-term shifts in consumption behaviour. These findings provide useful empirical evidence for perceived changes in household resource consumption during the pandemic, suggest that we need to better protect low-income and Black households from the effects of large-scale disruptions, and can inform more effective and equitable disaster response policies.
Conditions for symmetry reduction of polysymplectic and polycosymplectic structures
Authors: García-Toraño Andrés E , Mestdag T 
Published: July 2023

Abstract
For Hamiltonian field theories on polysymplectic manifolds with a symmetry group action and a momentum map, we explore the redundancy in a set of necessary conditions that has appeared in the literature, for a generalized version of the Marsden–Weinstein symmetry reduction theorem. Next, we prove a necessary and sufficient condition for polycosymplectic reduction. We relate polycosymplectic reduction in a one-to-one way to the reduction of an associated larger polysymplectic manifold. Throughout the paper, we provide examples and discuss special cases.
Bursa Uludag University’s Contribution to the Society with Sustainability Projects
Authors: Salihoglu Guray , Turhan Sule 
Published: July 2023

Abstract
Universities bring solutions to society’s problems with academic research and education and by raising leaders who would be role models. There are more than 8 million university students in Turkey. Approximately ten percent of the population is university students in Turkey. Therefore the positive influence of sustainability projects at universities will be undeniable. Bursa Uludag University (BUU) is a large state university with over 60 000 students and 6000 staff. The vision of BUU Sustainable Campus Project, which was launched in April 2021, was stated as “Being a university that lives sustainability in all activities such as research, education, and campus operations.” This paper aims to present the contribution of BUU’s sustainability efforts to the social cohesion between the university staff and students and among the members of the society and city. BUU’s short but significant journey toward sustainable development will be shared. Several projects such as seed balls, ecological gardens, waste-to-art, an introduction to sustainability, a walk for the Environment, no elevators day, rainwater harvesting, and corporate sustainability expert program will be presented to this aim.
NCNU dedicates to develop green campus and renewable energy for environmental sustainability
Authors: Wuu Dong-Sing , Liu I-Chung , Chen Ku-Fan 
Published: July 2023

Abstract
National Chi Nan University (NCNU) is located in Puli in central Taiwan with an altitude of 665 meters, making it the highest university in Taiwan. NCNU has a single campus with a total area of 150 ha and a ratio of green cover of 80% including 39.6% forest and 40.7% planted vegetation. In addition to forest and planted vegetation areas, area for water absorption accounts for 16.3% of campus. NCNU designates around 40% of total budget for sustainability effort each year. Percentage of operation and maintenance activities during Covid-19 pandemic is up to 92% because of good disease prevention measures. NCNU campus is surrounded by dense valleys and forests that provides a habitat for many wild animals such as cattle egrets, pangolins, and butterflies. Recently, NCNU dedicates to construct solar power generation system on campus. The power generation capacity of the system is around 3.0 MW to date, which supplies for 20% of annual power consumption. The solar power generation system is constructing continuously and will reach a total power generation capacity of 8.2 MW in 2023, which accounts for around 90% of annual power consumption.