bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation of Selective Adsorption Materials Based on AI203 and their Adsorption Properties for Sr2+
Authors: Long-xian LI , Zhi-hui Du , Yan-jun Wang , Hong-jun Cao , Yang Yang 
Published: August 2021

Abstract
Aiming at the selective adsorption treatment of 90Sr in radioactive waste liquid, we need to synthesize MnO2 and other inorganic ion exchanger with high selectivity for Sr2+ in the waste water, find the best material ratio, and prepare the raw material liquid. The feed liquid is blown into the hot dimethylsilicone oil by the self-made spherical particle preparation device and loaded on the Al2O3 matrix. The composite adsorbent with appearance and size similar to ion exchange resin was prepared. The physicochemical properties of the composite adsorbent were characterized by SEM,FT-IR and XRD.Different concentrations of strontium ion solution were prepared to study the change of adsorption capacity of Sr2+ at different time. The effects of pH on the adsorption properties of the adsorption properties under the influence of different initial concentrations and different coexisting ions were studied. According to the experimental data, the pseudo first order and quasi second order kinetic first order and quasi second order kinetic equations were used to fit the adsorption process. Two typical adsorption isotherm models, Langmuir and Freundlich models, were used to describe the adsorption process of Sr2+ by composite adsorbents.
Progress of proton exchange membrane fuel cell
Authors: Xu Zhaohe 
Published: August 2021

Abstract
The rapid development of the economy of China leads to the significant growth of energy production and consumption demand. At present, the total amount of greenhouse gas emissions has ranked second in the world. To meet the challenges caused by global climate change and environmental pollution as well as realize the sustainable development of our country’s economy, carbon neutrality should be achieved. As a new type of low-temperature fuel cell, proton exchange membrane fuel cell (PEMFC) attracts a lot of attention due to its safe and environmentally friendly characteristics. However, the operating efficiency of the current commercial PEMFC is rather low (about 50%), which means that about half of the energy will be released as thermal energy. The stable and reliable heat dissipation of the fuel cell has a decisive impact on its performance and life, i.e., thermal management issues are particularly important for the efficiency and stability of the PEMFC stack. This article reviews the thermal management of PEMFC and analyzes the specific applicable conditions of cooling methods as well as the latest developments in thermal management methods. Specifically, it focuses on the thermal characteristics of PEMFC and its effects on performance and life. Besides, the PEMFC thermal management schemes and control strategies under different cooling methods are also summarized.
Cost comparison and difference analysis of prefabricated concrete shear wall structure housing
Authors: Liurui  , Tongliang Xiao 
Published: August 2021

Abstract
This paper makes a deep comparison and research on the cost of prefabricated concrete structure which is popularized vigorously by our country. By comparing the cost of three high-rise concrete residential projects with different prefabrication rates, this paper makes a detailed comparison of the total above-ground cost, civil construction and installation, and the cost of prefabricated components. On this basis analyzes the influence of adjusting prefabricated components on the prefabrication rate and the influence of prefabrication rate on the change of cost. Finally, it is discussed that the cost of prefabricated housing project is higher than that of traditional cast-in-place concrete housing mainly because of the increase of steel and concrete content of prefabricated components, transportation cost, main material consumption and comprehensive unit price. In this paper, the cost comparison and difference of prefabricated housing provides reference and reference for the future cost analysis of prefabricated housing.
The material comparison design of penstock pipe for a hydroelectric pumped storage station
Authors: Zhuqiao Ma , Yang Lu , Fan Hu , Yijie Huang , Jianping Zhao 
Published: August 2021

Abstract
Penstock pipe belongs to special pressure equipment, which has the risk of explosion. Therefore, it is necessary to strengthen the analysis of common accident damage forms and causes of penstock pipe, and do a good job in quality inspection to ensure the safe operation of penstock pipe. This paper mainly studies the penstock pipe of hydraulic storage power station. In the two kinds of steel, the more suitable steel structure is selected by semi elliptical crack analysis and FAD evaluation. According to the experimental data, steel B is more suitable for this structure. Because the failure time of the material, we make thickness correction with MATLAB. Finally, according to the analysis results, it is more appropriate to select steel B as the material of the penstock.
Effect of pruning on endogenetic hormone content associated with differentiation of blueberry flower buds
Authors: Liu Jundou , Ye Xiaoshuang , Yu Gengyan , Kang Xiaoru , Wang Xun 
Published: August 2021

Abstract
In this study, the relationship between pruning methods and endogenous hormone contents related to flower bud differentiation of Brigitta blueberries cultivated in Southwest China was studied. We performed the top pruning in June. The contents of endogenous hormones related to flower bud differentiation of blueberry were measured and analyzed. After top pruning, there was no significant change in the content of ethylene among the five endogenous hormones, but top pruning had a significant effect on the content of the other four hormones, which indicated that top pruning could affect flower bud differentiation by regulating the content of endogenous hormones.
Kinetic study on silicon-activation reaction of sodium carbonate roasting electrolytic manganese residue
Authors: Lv Ying , Peng Qiuju , Li Jia , Liu Xingyu , Chen Bowei , Zhang Mingjiang 
Published: August 2021

Abstract
In order to explore the economic and comprehensive utilization of electrolytic manganese residue (EMR), the reaction kinetics of sodium carbonate roasting EMR were studied by using the model of flake structure minerals. The results showed that the initial roasting reaction was controlled by chemical reaction, while the middle and late reaction is controlled by diffusion. From the content of available silicon and the change node of the control type, the roasting reaction was basically completed in the initial stage. Therefore, chemical reaction control was the determining factor affecting the available silicon content in the process of sodium carbonate roasting EMR.
Study on rapid formation of aerobic granular sludge promoted by addition of Fe2+
Authors: Wang Ke , Zhang Xiaolei , Song Wei , Song Tao , Li Ji 
Published: August 2021

Abstract
The aerobic granular sludge (AGS) process has been regarded as a promising sewage treatment technology. Compared with the activated sludge process, AGS process has the advantages of high efficiency and saving space. However, AGS process has several limitations in its application such as long cultivation cycle and easy disintegration. In this study, Fe2+ was added to the wastewater to cultivate AGS. The improvement on the cultivation of AGS with the addition of Fe2+ was investigated by analyzing the characteristics of AGS and the removal efficiency of pollutants. The results showed that adding Fe2+ (3~5 mg/L) to the reactor could effectively promote the formation of AGS. The sludge particles could be granulated within 7 days with the average particle size of more than 0.35 mm. In addition, the SEM showed that the dominant microorganisms were coryneform bacteria inside of the AGS. The XRD results indicates that the Fe2+ was converted into Fe2O3 presenting in AGS. The mixed liquid suspended solids (MLSS) and the sludge volume index at 30 min (SVI30) was 3.1 g/L and 40 mL/g, respectively, at the 40th day. The COD and NH4
+-N were effectively removed by AGS. This study could provide an effective approach for rapid formation of AGS.
Effect of surfactants on anti-Escherichia coli ability of MgO nanoparticles
Authors: Li Xiaoyi , Zhao Jiao , Zhu Yimin 
Published: August 2021

Abstract
MgO nanoparticles (MgO NPs) were obtained by a simple hydrothermal-calcination method. The influence of three different surfactants on the surface morphology, particle size and antibacterial performance of MgO NPs was investigated. The SEM results indicated that compared with using benzoic acid and citric acid, the MgO sample has more regular flake morphology and well dispersion, moreover, its particle size has more small and uniform when EDTA-2Na was used as the surfactant. The colony-forming unit count and optical density (OD) measurement results suggested that MgO NPs prepared using EDTA-2Na had the best antibacterial activity against Escherichia coli (E. coli), which might be originated from the small particle size and low aggregation. Our study demonstrated that using proper surfactant was a key way during the synthesis process to control the size and morphology of MgO NPs and enhance its antibacterial efficiency, and this way was expected to be applied to other inorganic antibacterial agents.
Effect of different organic salts on ammonia volatilization in ammonium nitrate
Authors: Wang Wei , Pang Shu-Feng 
Published: August 2021

AbstractThe ammonium salts and organic salts are the important components of atmospheric aerosols. The reaction between the two salts will cause the release of NH3, hence, affecting the budget of NH3in the atmosphere. Furthermore, the equilibrium partitioning of NH3in the gas and particle phases plays a key role in the evolution of chemical composition and size of fine atmospheric particles. In this work, the chemical composition evolution processes of mixed particles consisting of four different organic acid salts (sodium oxalate (SO), sodium malonate (SM), sodium succinate (SS), sodium pyruvate (SP)) with ammonium nitrate (AN) were measured by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR). The release of NH3were gained by monitoring the changes in the absorbance of NH4+in mixed organic acid salts/AN particles under 70% relative humidity (RH). After 127 minutes, the remaining ammonium content in the four mixed aerosols was 84.2%, 71.6%, 57.1%, and 28.7% for SO, SM, SS, and SP mixed with AN, respectively, which is lower than that in pure AN aerosol (97%). This study may help to further understand the conversion process between organic salts and AN in the atmosphere, as well as the NH3cycles in the atmosphere.
Application research of internal electrolysis as pre-treatment for berberine wastewater biodegradation
Authors: Xingfu Xue 
Published: August 2021

Abstract
The composition of the berberine wastewater is complicated with high concentration of chemical oxygen demand (COD). Because it is hard to be degraded by traditional biochemical treatment and causes serious environmental pollution. The applicability of internal electrolysis to improve the biodegradability of berberine wastewater to be treated biologically was investigated. The wastewater was originated from a factory producing berberine. Treatability studies were conducted under laboratory conditions in order to determine the operational conditions to enhance the biodegradation of the wastewater.The major operational conditions, such as the initial pH, the second stage pH, the volume ratio of iron-carbon microelectrolysis filler to waste water and aeration time were investigated in the paper. The result of the experiment shows that the initial pH 2.0-2.5, second stage pH 9, the best volume ratio of iron-carbon micro-electrolysis packing and wastewater is 1:1 and the the residence time control in 120 minutes are the best operating parameters on the berberine wastewater treatment.
Case study on the application of low-temperature plasma integration technology for the treatment mercury-containing waste gas from the crushing process of waste fluorescent lamps
Authors: Qinzhong Feng , Yang Chen , Liyuan Liu , Shihao Wei , Junfeng Wang , Yue Li , Ying Shen , Xu Feng 
Published: August 2021

Abstract
Because mercury has the characteristics of volatility, toxicity and global migration, mercury pollution has become a hot, difficult and focus issue of global concern. Based on China’s environmental technology verification method, the case study for low-temperature plasma integrated technology for the treatment mercury-containing exhaust gas in the treatment process of waste fluorescent lamps was carried out. The total gaseous mercury in the exhaust gas after treatment was less than 0.01mg/m3, which met the emission limit requirements in the Emission Standard (GB16297-1996). The pulse voltage of the plasma power supply is 10-35kV, the pulse current is 8-160A, and the pulse frequency is100-1000Hz. Case study showed that low temperature plasma integrated treatment technology is the available technology for advanced treatment of mercury-containing waste gas.
Research Status of Low-Temperature Electrolyte Additives for Lithium-ion Batteries
Authors: Han Fujuan , Chang Zenghua , Liu Xingge , Li Alin , Wang Jing , Ding Haiyang , Lu Shigang 
Published: August 2021

Abstract
Lithium-ion batteries have been the most promising energy storage technology in the field of new energy due to their advantages such as high specific energy. With the further expansion of the application range, higher requirements are placed on the low-temperature performance of the battery. The development of suitable electrolyte additives to improve the interface structure of the electrode and the electrolyte is an effective and economically feasible method to improve the low-temperature performance of the battery. This article reviews the research progress of low-temperature electrolyte additives for lithium-ion batteries in recent years. It summarizes the action mechanism of low-temperature electrolyte additives from three aspects: organic solvent additives, lithium salt additives, and new additives. The development of low-temperature electrolyte additives in the next step was prospected.
Study on a new composite gel system
Authors: Yi Sun , Wei Gao , Ding-Xue Zhang 
Published: August 2021

Abstract
A composite gel system was developed to solve the problems of low gel forming viscosity, gel forming and high salinity resistance in pH range of 6~8. The viscosity of the gel was determined by rotary viscometer, and the performance of the composite gel was analyzed. The pH of the composite gel, the gelation property of the mineralized degree and the plugging test of the sand filling pipe and the oil displacement experiment were carried out. The results showed that the gel performance of the composite gel was better than that of the conventional gel system at 60 degrees Celsius. The viscosity of the composite gel reached 10000 mPa S, at 0.1% polyacrylamide concentration, the gel forming range of pH was 6~12, and the viscosity of 20000 mg/L NaCl solution reached 15000 mPa/s, which had better salt resistance. The plugging test of sand filling pipe showed that the plugging rate of the gel to permeation layer was close to 90%, and the plugging ability was better. After 18% 0.2pv injection, the recovery rate increased by about 18%, which can meet the requirements of profile control in most oilfields.
Comparative Study on the Determination of heavy metals in Soil by XRF and ICP-MS
Authors: Li Wenyu , Niu Ning , Guo Ning , Zhou Hao , Bu Jiangping , Ding Aifang 
Published: August 2021

Abstract
The contents of Cr, Ni, Cu, Zn, As, Pb and Cd in standard soil for composition (GBW07403) and two soil samples were determined by XRF and ICP-MS, respectively. The results showed that XRF had higher precision than ICP-MS in the determination of seven metals in standard soil, but the relative errors of Ni, As and Cd were larger, up to -33%~22.7%. XRF and ICP-MS were used to determine contents of seven kinds of heavy metals in 2 soil samples, respectively. Both methods had high precision. F test showed that there was no significant difference in precision between the two methods except for Cd in No.2 soil. The t test showed that there were significant differences by the two methods for the determination of other heavy metals except for Cd and Cu (P ≤0.05). Although the method of XRF was fast and simple, its accuracy and comparison with other experimental methods need to be further studied due to the sample matrix effect.
Design and application of a fluorescent probe for rapid detection of H2S
Authors: Su Sa 
Published: August 2021

Abstract
H2S is an endogenous gaseous signal molecule with cell protective function, which plays a critical part in many physiological and pathological processes. On the one hand, abnormal fluctuations of the concentration of hydrogen sulfide in the human body are closely related to diseases such as Down's syndrome, Alzheimer's, diabetes and cirrhosis of the liver. On the other hand, acts as an antioxidant in the body, hydrogen sulfide can protect cells from damage caused by reactive oxygen species. Therefore, it is indispensible to detect hydrogen sulfide in living organisms. A fluorescent probe—NX-H2S, was constructed using azide group as the recognition group and naphthalimide as the framework. The spectroscopic properties of the probe were explored comprehensively. The experiment results show that NX-H2S exhibits not only a fast response (5 min) but also excellent sensitivity and selectivity toward H2S. In addition to the rapid detection of H2S in vitro, NX-H2S can also be successfully applied to the fluorescence imaging analysis of endogenous and exogenous H2S in living cells.
Technical research on heat storage and function expansion of thermos cup
Authors: Yong Jiang , Sisheng Wei , Xinru Han , Wenwen Ma , Yuting Zhao , Shuhao Feng , Shanjie Han 
Published: August 2021

Abstract
The new multi-functional heat preservation cup can not only achieve long-term heat preservation, but also keep the water temperature at a more suitable temperature for drinking in a short time. It uses paraffin phase change heat storage material as the filler of the inner liner sandwich, which can absorb the heat in the water temperature and achieve rapid cooling; solar panels are used above the cup cover to supply power for electronic devices, which can save energy and protect the environment and avoid the trouble of charging back and forth; At the same time, a variety of electronic devices are added to the cup cover to enrich the customer's experience.
Finite Element Analysis and Theoretical Verification of Natural Vibration of Novel Simply-supported Beams
Authors: Zhong Rongqiang , Zhao Yi , Yao Lirong , Liu Jining , Li Zhiming , Guo jing 
Published: August 2021

AbstractIn order to investigate the dynamic characteristics of I-shaped novel simply-supported beams with the upper flange of rectangular high-strength concrete filled steel tube (RHCFST), the modal analysis of 16 simply-supported beams is conducted by ANSYS finite element software. The first order frequencies of the specimen beams are obtained in the Y direction. Based on the concentrated mass method, the frequencies of the specimens are theoretically calculated. By comparison the maximum error of the first-order frequency is 3.80%, which is in good agreement and can meet the precise requirements of practical engineering. The result shows that the first three order vibration modes of the specimen are consistent with the theoretical vibration modes. For the first-order vibration mode, the proportion of the effective mass to the total mass of the specimen is 79.2 % in the Y direction. Therefore, the first-order vibration mode in Y direction should be mainly taken into consideration for this type of beams during the structural design.
Fabrication and characterization of large-area suspended MoSe2 crystals down to the monolayer
Authors: Varghese Sebin , Saleta Reig David , Dudley Mehew Jake , Block Alexander , El Sachat Alexandros , Chávez-Ángel Emigdio , Sledzinska Marianna , Ballesteros Belén , Sotomayor Torres Clivia M , Tielrooij Klaas-Jan 
Published: August 2021

Abstract
Many layered materials, such as graphene and transition metal dichalcogenides, can be exfoliated down to atomic or molecular monolayers. These materials exhibit exciting material properties that can be exploited for several promising device concepts. Thinner materials lead to an increased surface-to-volume ratio, with mono- and bi-layers being basically pure surfaces. Thin crystals containing more than two layers also often behave as an all-surface material, depending on the physical property of interest. As a result, flakes of layered materials are typically highly sensitive to their environment, which is undesirable for a broad range of studies and potential devices. Material systems based on suspended flakes overcome this issue, yet often require complex fabrication procedures. Here, we demonstrate the relatively straightforward fabrication of exfoliated MoSe2 flakes down to the monolayer, suspended over unprecedentedly large holes with a diameter of 15 µm. We describe our fabrication methods in detail, present characterization measurements of the fabricated structures, and, finally, exploit these suspended flakes for accurate optical absorption measurements.
Enzymatic determination of d-alanine with l-alanine dehydrogenase and alanine racemase
Authors: Ashida Hiroyuki , Sawa Yoshihiro , Yoshimura Tohru 
Published: August 2021

ABSTRACT
An enzymatic assay system of d-Ala, which is reported to affect the taste, was constructed using alanine racemase and l-alanine dehydrogenase. d-Ala is converted to l-Ala by alanine racemase and then deaminated by l-alanine dehydrogenase with the reduction of NAD+ to NADH, which is determined with water-soluble tetrazolium. Using the assay system, the d-Ala contents of 7 crustaceans were determined.
Neutrophils Contribute to Severity of Tuberculosis Pathology and Recovery From Lung Damage Pre- and Posttreatment
Authors: Nwongbouwoh Muefong Caleb , Owolabi Olumuyiwa , Donkor Simon , Charalambous Salome , Bakuli Abhishek , Rachow Andrea , Geldmacher Christof , Sutherland Jayne S 
Published: August 2021

Abstract

Background
Despite microbiological cure, about 50% of tuberculosis (TB) patients have poor lung recovery. Neutrophils are associated with lung pathology; however, CD16/CD62L-defined subsets have not been studied in TB. Using flow cytometry, we monitored frequencies, phenotype, and function of neutrophils following stimulation with Mycobacterium tuberculosis (Mtb) whole cell lysate (WCL) and ESAT-6/CFP-10 fusion protein (EC) in relation to lung pathology.

Methods
Fresh blood from 42 adult, human immunodeficiency virus (HIV)–negative TB patients were analyzed pre- and post-therapy, with disease severity determined using chest radiography and bacterial load. Flow cytometry was used to monitor frequencies, phenotype, and function (generation of reactive oxygen species [ROS], together with CD11b, tumor necrosis factor, and interleukin 10 [IL-10] expression) of neutrophils following 2-hour stimulation with Mtb-specific antigens.

Results
Total neutrophils decreased by post-treatment compared to baseline (P = .0059); however, CD16brCD62Lbr (segmented) neutrophils increased (P = .0031) and CD16dimCD62Lbr (banded) neutrophils decreased (P = .038). Banded neutrophils were lower in patients with severe lung damage at baseline (P = .035). Following WCL stimulation, ROS from segmented neutrophils was higher in patients with low Mtb loads even after adjusting for sex (P = .038), whereas IL-10–expressing CD16dimCD62Llo cells were higher in patients with mild damage (P = .0397) at baseline.

Conclusions
High ROS generation, low levels of banded neutrophils, and high levels of IL-10–expressing CD16dimCD62Llo neutrophils are associated with reduced lung pathology at diagnosis. Hence, neutrophils are potential early indicators of TB severity and promising targets for TB host-directed therapy.