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Article ; Online: Exploring the Role of International Research Collaboration in Building China’s World-Class Universities

Duanhong Zhang / Wenjia Ding / Yang Wang / Siwen Liu

Sustainability, Vol 14, Iss 3487, p

2022 Volume 3487

Abstract: This study explored the international research collaboration led by China’s world-class universities and its impact during the first construction cycle of the “Double First-Class” initiative (2016–2020). We collected international collaborative ... ...

Abstract	This study explored the international research collaboration led by China’s world-class universities and its impact during the first construction cycle of the “Double First-Class” initiative (2016–2020). We collected international collaborative publications based on the Scopus database and examined the performance of international research collaboration in terms of quantity, impact, collaborative networks, and subject areas using scientometric indicators and social network analysis. We found that international collaboration accounts for only a quarter of the total output but is far above the overall level of scientific papers in terms of quality and impact. The United States, the United Kingdom, Australia, and Hong Kong remain China’s closest partners. Meanwhile, ties with Belt and Road partner countries have become stronger with the introduction of foreign policy. China’s medicine and multidisciplinary research have gained prominence in the context of the global health crisis. Thus, international research collaboration effectively improves research performance, deepens academic networks, and disseminates local issues and solutions to the world, thereby enabling China’s world-class universities to reconcile global engagement with Chinese characteristics.
Keywords	world-class university ; international collaboration ; China ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Subject code	001
Language	English
Publishing date	2022-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Construction of Swimmer's Underwater Posture Training Model Based on Multimodal Neural Network Model

Wei Wen / Tingyu Yang / Yanhao Fu / Siwen Liu

Computational Intelligence and Neuroscience, Vol

2022 Volume 2022

Abstract: Swimming monitoring based on acceleration sensor is an emerging research direction in the field of human motion recognition. As a public sport, swimming has a wide audience. The swimming monitoring system can facilitate people to monitor and record their ...

Abstract	Swimming monitoring based on acceleration sensor is an emerging research direction in the field of human motion recognition. As a public sport, swimming has a wide audience. The swimming monitoring system can facilitate people to monitor and record their own swimming data, so as to formulate a reasonable training plan. Aiming at the defects of single modal information representation ability, high contingency, and easy to be influenced by the outside world, this paper adopts the underwater posture training model of swimmers to perform multimodal information fusion. In this paper, a multimodal information fusion method based on evolutionary neural network is proposed, and an intelligent perception information processing model of the intelligent subject system is constructed. Aiming at the defect that the accuracy and speed of the underwater posture monitoring of swimmers cannot be guaranteed in a complex environment, an evolutionary neural network optimized by a multimodal adaptive genetic algorithm is constructed to perform multimodal information fusion to ensure the effectiveness of the system in the face of complex information. Regarding attitude detection, it mainly uses the three dimensions of the angle of movement, the influence of gravity, and the strength and speed of the movement to measure. The MPU6050 module processor has a wide range of applications and is a mold processing tool with high performance and level. It completes the data processing, data calculation, and data storage of the inspection system in this paper. This paper further studies the working principle, structure, and operation process of this module and adjusts the time error in the detection of carrier motion and attitude so that the processing function of this module can play an optimal state. Four kinds of swimming posture measurement experiments were carried out on the swimmers, and the experimental data were analyzed. The whole system is controlled by the host computer man-machine interaction software remotely and in real time ...
Keywords	Computer applications to medicine. Medical informatics ; R858-859.7 ; Neurosciences. Biological psychiatry. Neuropsychiatry ; RC321-571
Subject code	629
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Hindawi Limited
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Preparation of Mullite/PU Nanocomposites by Double Waste Co-Recycling

Xiaohua Gu / Yanwei Zhu / Siwen Liu / Shangwen Zhu / Yan Liu

Sustainability, Vol 14, Iss 14310, p

2022 Volume 14310

Abstract: The massive accumulation of industrial waste has become an environmental problem that is very difficult to deal with. In this paper, mullite whisker nanomaterials were developed independently using industrial waste residues, which were used to degrade ... ...

Abstract	The massive accumulation of industrial waste has become an environmental problem that is very difficult to deal with. In this paper, mullite whisker nanomaterials were developed independently using industrial waste residues, which were used to degrade polyurethane (PU) solid waste by alcoholysis with ethylene glycol (EG) and ethanolamine (ETA) bi-component, and mullite modified regenerated polyol materials were obtained by double waste synergistic recycling. Mullite/PU foam nanocomposites were prepared by one-step foaming. The analysis of the test results shows that, at EG/ETA = 2:1 and mullite whisker addition of 0.15%, the regenerated rigid PU foam obtained has low thermal conductivity and higher compressive strength, at which time the regenerated PU foam has the best performance. The FTIR test results show that the silanol of mullite reacts with isocyanate during foaming and is attached to the polyurethane chain, such that the compressive strength and thermal insulation properties are maximized. It provides a new way to create a “double waste synergy” for preparing high-value materials by comprehensively utilizing resources.
Keywords	waste PU rigid foam ; double waste synergy ; industrial waste residue ; mullite ; alcoholysis ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Language	English
Publishing date	2022-11-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Analysis of Influencing Factors in the Preparation of Mullite Whiskers from Recovering Silicon-Rich Waste under Low-Temperature Conditions

Xiaohua Gu / Peiquan Chen / Tong Wang / Siwen Liu / Shangwen Zhu / Yanwei Zhu / Yan Liu

Nanomaterials, Vol 13, Iss 1143, p

2023 Volume 1143

Abstract: A large amount of catalyst waste containing silicon is deposited or buried every year, resulting in serious environmental pollution and a waste of resources. In this paper, a method to prepare mullite whiskers by recycling silica-rich waste under low- ... ...

Abstract	A large amount of catalyst waste containing silicon is deposited or buried every year, resulting in serious environmental pollution and a waste of resources. In this paper, a method to prepare mullite whiskers by recycling silica-rich waste under low-temperature conditions was investigated. The effects of raw materials, sintering temperature, catalyst addition, holding time and co-solvent addition on the structure, morphology and phase transition of the synthesized whiskers were investigated and characterized with SEM, XRD, TEM, TG and DTA. The results show that the addition of 10% Na 2 SO 4 as the liquid-phase mass transfer medium could effectively improve the crystallization efficiency of mullite whiskers, while providing an ideal living environment for the growth of whiskers. The crystallinity and uniformity of mullite were positively correlated with the addition of aluminum fluoride trihydrate and the holding time, respectively. The growth law and conditions of mullite whiskers are discussed, and the optimal growth process conditions of mullite whiskers were optimized. The optimal conditions for mullite whiskers were determined as follows: the addition of aluminum fluoride is 5 wt%, the sintering temperature is 825 °C, and the holding time is 5 h at the time of sintering. This work offers new prospects for the industrial production of mullite whiskers from recycled silica-rich waste.
Keywords	silicon-rich ; mullite whiskers ; low temperature ; sintering temperature ; keep-warm time ; Chemistry ; QD1-999
Subject code	660
Language	English
Publishing date	2023-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Study and Characterization of Regenerated Hard Foam Prepared by Polyol Hydrolysis of Waste Polyurethane

Xiaohua Gu / Xiaoyao Wang / Xinyu Guo / Siwen Liu / Qi Li / Yan Liu

Polymers, Vol 15, Iss 1445, p

2023 Volume 1445

Abstract: In this paper, four different kinds of diols were used for the alcoholysis of waste thermoplastic polyurethane elastomers. The recycled polyether polyols were used to prepare regenerated thermosetting polyurethane rigid foam through one-step foaming. We ... ...

Abstract	In this paper, four different kinds of diols were used for the alcoholysis of waste thermoplastic polyurethane elastomers. The recycled polyether polyols were used to prepare regenerated thermosetting polyurethane rigid foam through one-step foaming. We used four different kinds of alcoholysis agents, according to different proportions of the complex, and we combined them with an alkali metal catalyst (KOH) to trigger the catalytic cleavage of the carbamate bonds in the waste polyurethane elastomers. The effects of the different types and different chain lengths of the alcoholysis agents on the degradation of the waste polyurethane elastomers and the preparation of regenerated polyurethane rigid foam were studied. Based on the viscosity, GPC, FT-IR, foaming time and compression strength, water absorption, TG, apparent density, and thermal conductivity of the recycled polyurethane foam, eight groups of optimal components were selected and discussed. The results showed that the viscosity of the recovered biodegradable materials was between 485 and 1200 mPa·s. The hard foam of the regenerated polyurethane was prepared using biodegradable materials instead of commercially available polyether polyols, and its compressive strength was between 0.131 and 0.176 MPa. The water absorption rate ranged from 0.7265 to 1.9923%. The apparent density of the foam was between 0.0303 and 0.0403 kg/m 3 . The thermal conductivity ranged from 0.0151 to 0.0202 W/(m·K). A large number of experimental results showed that the degradation of the waste polyurethane elastomers by the alcoholysis agents was successful. The thermoplastic polyurethane elastomers can not only be reconstructed, but they can also be degraded by alcoholysis to produce regenerated polyurethane rigid foam.
Keywords	waste polyurethane elastomer ; degradation and recovery ; glycolysis ; diols ; regenerated polyurethane foam ; Organic chemistry ; QD241-441
Subject code	600
Language	English
Publishing date	2023-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Mechanistic Insights into Stereospecific Antifungal Activity of Chiral Fungicide Prothioconazole against Fusarium oxysporum F. sp. cubense

Xiaofang Yang / Ronggao Gong / Yuanqi Chu / Siwen Liu / Dandan Xiang / Chunyu Li

International Journal of Molecular Sciences, Vol 23, Iss 2352, p

2022 Volume 2352

Abstract: As a typical triazole fungicide, prothioconazole (Pro) has been used extensively due to its broad spectrum and high efficiency. However, as a racemic mixture of two enantiomers ( R -Pro and S -Pro), the enantiomer-specific outcomes on the bioactivity ... ...

Abstract	As a typical triazole fungicide, prothioconazole (Pro) has been used extensively due to its broad spectrum and high efficiency. However, as a racemic mixture of two enantiomers ( R -Pro and S -Pro), the enantiomer-specific outcomes on the bioactivity have not been fully elucidated. Here, we investigate how chirality affects the activity and mechanism of action of Pro enantiomers on Fusarium oxysporum f. sp. cubense tropical race 4 ( Foc TR4), the notorious virulent strain causing Fusarium wilt of banana (FWB). The Pro enantiomers were evaluated in vivo and in vitro with the aid of three bioassay methods for their fungicidal activities against TR4 and the results suggested that the fungicidal activities of Pro enantiomers are stereoselective in a dose-dependent manner with R -Pro making a major contribution to the treatment outcomes. We found that R -Pro led to more severe morphological changes and impairment in membrane integrity than S -Pro. R -Pro also led to the increase of more MDA contents and the reduction of more SOD and CAT activities compared with the control and S -Pro groups. Furthermore, the expression of Cytochrome P450 14α-sterol demethylases (CYP51), the target for triazole fungicides, was significantly increased upon treatment with R -Pro rather than S -Pro, at both transcriptional and translational levels; so were the activities of the Cytochrome P450 enzymes. In addition, surface plasmon resonance (SPR) and molecular docking illuminated the stereoselective interactions between the Pro enantiomers and CYP51 of TR4 at the target site, and R -Pro showed a better binding affinity with CYP51 than S -Pro. These results suggested an enantioselective mechanism of Pro against TR4, which may rely on the enantioselective damages to the fungal cell membrane and the enantiospecific CYP51 binding affinity. Taken together, our study shed some light on the mechanisms underlying the differential activities of the Pro enantiomers against TR4 and demonstrated that Pro can be used as a potential candidate in the ...
Keywords	prothioconazole ; enantiomer ; Fusarium wilt of banana ; Foc TR4 ; stereoselective ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
Subject code	500 ; 571
Language	English
Publishing date	2022-02-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Meta-Analysis of Rumen-Protected Methionine in Milk Production and Composition of Dairy Cows

Chunbo Wei / Tao He / Xuanchen Wan / Siwen Liu / Yibo Dong / Yongli Qu

Animals, Vol 12, Iss 1505, p

2022 Volume 1505

Abstract: This study aims to evaluate the influence of rumen-protected methionine (RPM) on the milk yield and milk compositions of dairy cows by employing a meta-analysis method. The articles in the publication databases between January 2010 and January 2022 which ...

Abstract	This study aims to evaluate the influence of rumen-protected methionine (RPM) on the milk yield and milk compositions of dairy cows by employing a meta-analysis method. The articles in the publication databases between January 2010 and January 2022 which reported on various concentrations of RPM supplements in dairy cow diets and then monitored the milk yield and milk compositions were searched. A total of 14 studies were included, covering 27 treatments with a total of 623 dairy cows. Comprehensive Meta-Analysis V3 was used for statistical analysis, the forest map was drawn by the standard mean difference (SMD) with a 95% confidence interval (95% CI), and the SMD was calculated by a random effect model. The dose effect curve was drawn by fitting the SMD and RPM dose of each study to explore the optimal dosage of RPM. Compared with the basal diet, the RPM supplement significantly increased the percentages of milk fat (SMD (95% CI): 1.017% [0.388, 1.646]) and milk protein (SMD (95% CI): 0.884 [0.392, 1.377]). However, the milk yield (SMD (95% CI): 0.227 kg/d [−0.193, 0.647]) and lactose concentration (SMD (95% CI): 0.240% [−0.540, 1.020]) were not affected. The subgroup analysis found that the effect of the RPM supplement on the milk fat and milk protein was greater in the high-protein feed than in the low-protein feed. Multiple regression analysis showed that feeding RPM significantly improved the milk yield and milk protein percentage of dairy cows. The results of the dose–effect analysis show that the optimal range for the RPM was 7.5–12.5 g/d. RPM supplements in a dairy diet can improve the milk protein percentages and milk fat percentages of dairy cows.
Keywords	meta-analysis ; rumen protected methionine ; dairy cattle ; milk yield ; milk composition ; Veterinary medicine ; SF600-1100 ; Zoology ; QL1-991
Subject code	630
Language	English
Publishing date	2022-06-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: HPV genotypic spectrum in Jilin province, China, where non-vaccine-covered HPV53 and 51 are prevalent, exhibits a bimodal age-specific pattern.

Sijia Hao / Chunyan Wang / Siwen Liu / Jiaxue He / Yanfang Jiang

PLoS ONE, Vol 15, Iss 3, p e

2020 Volume 0230640

Abstract: BACKGROUND:Human papillomavirus (HPV), the most common sexually transmitted disease, is involved in a series of other diseases. The persistent infection of high-risk HPVs (HR-HPVs) is considered to be the causative agent of cervical cancer, and it is ... ...

Abstract	BACKGROUND:Human papillomavirus (HPV), the most common sexually transmitted disease, is involved in a series of other diseases. The persistent infection of high-risk HPVs (HR-HPVs) is considered to be the causative agent of cervical cancer, and it is related to noncervical cancers. The present study aims to estimate the HPV prevalence and genotype distribution in Jilin province, China, to guide HPV-related cervical cancer screening and HPV vaccination. METHODS:From October 2017 to September 2019, 21,282 samples (634 male and 20,648 female) were collected for HPV infection detection using an HPV genotyping panel. The age-related HPV prevalence and morbidity of HPV-based disease and HPV prevalence associated with specific diseases were analyzed. RESULTS:A total of 7095 (34.4%) positive for HPV infection of 20648 women, and 164 (25.8%) positive of 634 men. The HPV prevalence among women exhibited a bimodal pattern, with a peak in young group and a second peak in old group, with increased severity of cervical lesions. HPV16 (7.8%), HPV52 (5.8%), HPV58 (5.0%), HPV53 (3.4%), and HPV51 (3.0%) were the most prevalent genotypes among women, and HPV6 (6.0%), HPV11 (5.7%), HPV16 (3.6%), HPV18 (2.7%), and HPV51 (3.0%) were prevalent among men. Non-vaccine-covered HPV53 and 51 were found in 6.3% of HPV infection and 8.9% of cervical cancer in Jilin province. Furthermore, 45.5% of females and 28.6% of males with genital warts were infected with HR-HPV genotypes. CONCLUSION:The HPV genotypic spectrum in Jilin province, where non-vaccine-covered HPV53 and 51 were prevalent, exhibited an age- and cervical lesion-specific pattern, which provides guidance for HPV vaccination and cervical cancer screening. HPV infection in men and benign hyper-proliferative lesions should not be neglected.
Keywords	Medicine ; R ; Science ; Q
Subject code	610
Language	English
Publishing date	2020-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A Simple Stochastic Reaction Model for Heterogeneous Polymerizations

Jiashu Ma / Jiahao Li / Bingbing Yang / Siwen Liu / Bang-Ping Jiang / Shichen Ji / Xing-Can Shen

Polymers, Vol 14, Iss 16, p

2022 Volume 3269

Abstract: The stochastic reaction model (SRM) treats polymerization as a pure probability‐based issue, which is widely applied to simulate various polymerization processes. However, in many studies, active centers were assumed to react with the same probability, ... ...

Abstract	The stochastic reaction model (SRM) treats polymerization as a pure probability‐based issue, which is widely applied to simulate various polymerization processes. However, in many studies, active centers were assumed to react with the same probability, which cannot reflect the heterogeneous reaction microenvironment in heterogeneous polymerizations. Recently, we have proposed a simple SRM, in which the reaction probability of an active center is directly determined by the local reaction microenvironment. In this paper, we compared this simple SRM with other SRMs by examining living polymerizations with randomly dispersed and spatially localized initiators. The results confirmed that the reaction microenvironment plays an important role in heterogeneous polymerizations. This simple SRM provides a good choice to simulate various polymerizations.
Keywords	stochastic reaction model ; heterogeneous polymerization ; homogeneous polymerization ; reaction microenvironment ; Monte Carlo simulation ; Organic chemistry ; QD241-441
Subject code	660
Language	English
Publishing date	2022-08-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: The influence of soil particle size distribution and clay minerals on ammonium nitrogen in weathered crust elution-deposited rare earth tailing

Xin Fan / Qiang Xue / Siwen Liu / Jie Tang / Jiyang Qiao / Yuanying Huang / Jingmin Sun / NanNan Liu

Ecotoxicology and Environmental Safety, Vol 208, Iss , Pp 111663- (2021)

2021

Abstract: Even after being abandoned for many years, a large number of weathered crust elution-deposited rare earth (WCED-RE) tailings continue to release ammonia nitrogen (AN) pollution into their surrounding environments. However, the influences of particle size ...

Abstract	Even after being abandoned for many years, a large number of weathered crust elution-deposited rare earth (WCED-RE) tailings continue to release ammonia nitrogen (AN) pollution into their surrounding environments. However, the influences of particle size distribution and clay minerals on AN pollution caused by these tailings have been insufficiently studied, and its causes are poorly understood. In this study, soil samples at different depths (5, 7, 9, 11 and 14 m) were collected from a rare earth tailing in Ganzhou City, Jiangxi Province, China. Particles were screened by size into six groups (2–1, 1–0.5, 0.5–0.25, 0.25–0.1, 0.1–0.075 and < 0.075 mm), and AN forms were extracted. The results showed that as soil particle size decreases, both soil specific surface area and clay content increase, leading to stronger AN enrichment ability. With increased sampling depth, the distribution of clay across the six particle fractions became more uniform, such that the accumulation of AN in soil with fine particle size was less obvious. Clay minerals with different capacities for AN enrichment vary with sampling depth. This variation is responsible for the profile of AN distribution in the mine, where AN first increases and then decreases as vertical depth is increased. Although AN content was highest at 11 m, water soluble AN content was higher in the upper part of the completely weathered layer (5 and 7 m), which poses a higher environmental risk. This study provides significant information to deepen our understanding of the distribution characteristics of AN and its main influencing factors, as well as a foundation for the prevention and remediation of nitrogen pollution from WCED-RE tailings.
Keywords	Rare earth ; Ammonia nitrogen ; Particle size distribution ; Clay mineral ; Tailing ; Environmental pollution ; TD172-193.5 ; Environmental sciences ; GE1-350
Subject code	550
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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