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Article ; Online: A 3D-FEA study on the impact of different preparation forms and materials on posterior occlusal veneers.

Xu, Junchen / Ma, Junchi / Tan, Zhaolin / Zhang, Qi / Hu, Jian / Li, Jin

Journal of the mechanical behavior of biomedical materials

2024 Volume 152, Page(s) 106462

Abstract: Objectives: To study the stress distribution and bonding performance in posterior occlusal veneers and tooth bodies under different preparation forms and materials.: Methods: An isolated lower right first molar was prepared with non-retention type ( ... ...

Abstract	Objectives: To study the stress distribution and bonding performance in posterior occlusal veneers and tooth bodies under different preparation forms and materials. Methods: An isolated lower right first molar was prepared with non-retention type (type A), cavity-retained type (type B), and encircling-retention type (type C) forms. MicroCT images of the tooth were obtained and digitally converted into three-dimensional solid models. Three-dimensional models of veneers for the three abutment teeth were designed, fabricated, and divided into nine models (A Results: The B Conclusions: The cavity-retained type better protected the veneers and dental tissues than the non-retention and encircling-retention types under lateral forces. E.max CAD material, with a high elastic modulus, reduced the stress transmitted to the remaining dental tissues. Lava Ultimate exhibited the best bonding performance.
MeSH term(s)	Molar ; Finite Element Analysis ; Computer Simulation ; Elastic Modulus
Language	English
Publishing date	2024-02-08
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	2378381-3
ISSN	1878-0180 ; 1751-6161
ISSN (online)	1878-0180
ISSN	1751-6161
DOI	10.1016/j.jmbbm.2024.106462
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Article: Enterocytozoon bieneusi

Zhang, Ting / Yu, Kuai / Xu, Junchen / Cao, Wenjie / Wang, Yiqing / Wang, Jiayan / Zhou, Liyuting / Chen, Jiani / Huang, Huicong / Zhao, Wei

Microorganisms

2024 Volume 12, Issue 4

Abstract: Globally, ...

Abstract	Globally,
Language	English
Publishing date	2024-04-17
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2720891-6
ISSN	2076-2607
ISSN	2076-2607
DOI	10.3390/microorganisms12040811
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Article: Effect of Biodentine on Odonto/Osteogenic Differentiation of Human Dental Pulp Stem Cells.

Wang, Xuerong / Cai, Yixin / Zhang, Min / Xu, Junchen / Zhang, Chengfei / Li, Jin

Bioengineering (Basel, Switzerland)

2022 Volume 10, Issue 1

Abstract: This study aims to compare the biological characteristics of human dental pulp stem cells (hDPSCs) isolated from different-aged populations and examine the effects of Biodentine on proliferation and odonto/osteogenic differentiation of hDPSCs isolated ... ...

Abstract	This study aims to compare the biological characteristics of human dental pulp stem cells (hDPSCs) isolated from different-aged populations and examine the effects of Biodentine on proliferation and odonto/osteogenic differentiation of hDPSCs isolated from the elderly in vitro. hDPSCs were isolated from three different-aged populations: group A (≤18 years old), group B (19−59 years old), and group C (≥60 years old). The adhesion, proliferation, odonto/osteogenesis, and senescence were compared. The optimal concentration of aqueous Biodentine extract was determined by CCK-8 assay, alkaline phosphatase (ALP), and alizarin red staining (ARS). The effect of Biodentine on odonto/osteogenic gene and protein expression of hDPSCs in each group was evaluated by quantitative real-time PCR (QRT-PCR) and Western blot. hDPSCs were successfully isolated from three different-aged populations. Flow cytometry revealed that all isolated hDPSCs were positive for CD73 (>90%), CD90 (>90%), CD146 (<30%), and negative for CD45 (<1%). There existed an age-related decline in proliferation, odonto/osteogenic gene expression, and S-phase fraction (p < 0.05), an increase in senescence genes and p21 and p16 expression, and time needed for cell adhesion. Biodentine promoted hDPSC proliferation and mineralization in each group, particularly at a concentration of 0.2 mg/mL. Biodentine markedly enhanced odonto/osteogenesis-related gene and protein expression in each group (p < 0.05). hDPSCs can be obtained from populations of all ages. Though there is an age-related decline in their biological properties, hDPSCs from the elderly still maintain certain proliferation and multidirectional differentiation abilities. Biodentine can significantly promote the proliferation and odonto/osteogenic differentiation of hDPSCs isolated from the elderly over 60 years old, which could be considered a pulp capping material for vital pulp therapy in the elderly. Nevertheless, the efficacy of Biodentine in clinical application has to be further studied.
Language	English
Publishing date	2022-12-21
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2746191-9
ISSN	2306-5354
ISSN	2306-5354
DOI	10.3390/bioengineering10010012
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Article ; Online: High-Performance Adaptive Weak Fault Diagnosis Based on the Global Parameter Optimization Model of a Cascaded Stochastic Resonance System.

Lai, Zhihui / Huang, Zhangjun / Xu, Min / Wang, Chen / Xu, Junchen / Zhang, Cailiang / Zhu, Ronghua / Qiao, Zijian

Sensors (Basel, Switzerland)

2023 Volume 23, Issue 9

Abstract: Stochastic resonance (SR), as a type of noise-assisted signal processing method, has been widely applied in weak signal detection and mechanical weak fault diagnosis. In order to further improve the weak signal detection performance of SR-based ... ...

Abstract	Stochastic resonance (SR), as a type of noise-assisted signal processing method, has been widely applied in weak signal detection and mechanical weak fault diagnosis. In order to further improve the weak signal detection performance of SR-based approaches and realize high-performance weak fault diagnosis, a global parameter optimization (GPO) model of a cascaded SR system is proposed in this work. The cascaded SR systems, which involve multiple multi-parameter-adjusting SR systems with both bistable and tri-stable potential functions, are first introduced. The fixed-parameter optimization (FPO) model and the GPO models of the cascaded systems to achieve optimal SR outputs are proposed based on the particle swarm optimization (PSO) algorithm. Simulated results show that the GPO model is capable of achieving a better SR output compared to the FPO model with rather good robustness and stability in detecting low signal-to-noise ratio (SNR) weak signals, and the tri-stable cascaded SR system has a better weak signal detection performance compared to the bistable cascaded SR system. Furthermore, the weak fault diagnosis approach based on the GPO model of the tri-stable cascaded system is proposed, and two rolling bearing weak fault diagnosis experiments are performed, thus verifying the effectiveness of the proposed approach in high-performance adaptive weak fault diagnosis.
Language	English
Publishing date	2023-04-30
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s23094429
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Article ; Online: Strengthening flash light effect with a pond-tubular hybrid photobioreactor to improve microalgal biomass yield.

Xu, Junchen / Cheng, Jun / Xin, Kai / Xu, Jinhui / Yang, Weijuan

Bioresource technology

2020 Volume 318, Page(s) 124079

Abstract: Poor light utilization efficiency and large occupied area of traditional raceway pond photobioreactors result in low areal microalgal biomass yield in industrial applications. In this study, a pond-tubular hybrid photobioreactor (PTH-PBR) comprising ... ...

Abstract	Poor light utilization efficiency and large occupied area of traditional raceway pond photobioreactors result in low areal microalgal biomass yield in industrial applications. In this study, a pond-tubular hybrid photobioreactor (PTH-PBR) comprising raceway ponds and horizontal tubes was developed to strengthen flash light effect and improve areal microalgal biomass yield. The highest flash cycle frequency (0.63 Hz) of microalgae cells along flow pathway was obtained in the raceway pond of PTH-PBR when shaded area percentage was 20% and ratio of adjacent tube interval to tube diameter was 1, which enhanced microalgal biomass yield by 31.2% than traditional raceway pond. Meanwhile, intracellular chlorophyll content increased by 33.6% and PSII maximum quantum yield (F
MeSH term(s)	Biomass ; Light ; Microalgae ; Photobioreactors ; Ponds
Language	English
Publishing date	2020-09-06
Publishing country	England
Document type	Journal Article
ZDB-ID	1065195-0
ISSN	1873-2976 ; 0960-8524
ISSN (online)	1873-2976
ISSN	0960-8524
DOI	10.1016/j.biortech.2020.124079
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Article: Using lantern Zn/Co-ZIF nanoparticles to provide channels for CO2 permeation through PEO-based MMMs

Cheng, Jun / Hu, Leiqing / Liu, Niu / Wang, Yali / Xu, Junchen / Zhou, Junhu

Journal of membrane science. 2020 Mar. 01, v. 597

2020

Abstract: To reduce the diffusion resistance of CO2 and enhance its permeability in mixed matrix membranes (MMMs), lantern Zn/Co-ZIF nanoparticles were loaded in-situ into semi-interpenetrating cross-linked poly(ethylene oxide) (XLPEO) membranes to provide ... ...

Abstract	To reduce the diffusion resistance of CO2 and enhance its permeability in mixed matrix membranes (MMMs), lantern Zn/Co-ZIF nanoparticles were loaded in-situ into semi-interpenetrating cross-linked poly(ethylene oxide) (XLPEO) membranes to provide efficient channels for CO2 permeability. TEM and SEM results showed that the Zn/Co-ZIF nanoparticles (diameter 490–550 nm) treated at 145 °C possessed a lantern structure with hollow cores (diameter 380–450 nm) and thin shells (thickness 20–85 nm). XRD and BET results indicated that the nanocrystal structure and porosity of the Zn/Co-ZIF remained intact after etching at 145 °C. Peaks shifts in the infrared spectra confirmed that the Zn/Co-ZIF nanoparticles were well integrated with the XLPEO membrane through hydrogen bonds. Therefore, doping 15 wt% lantern Zn/Co-ZIF nanoparticles into the membrane dramatically increased CO2 permeability by 72% to 761.9 ± 3.0 barrers, while the CO2/N2 selectivity was above the upper bound established by Robeson in 2008.
Keywords	artificial membranes ; carbon dioxide ; crosslinking ; hydrogen bonding ; nanocrystals ; nanoparticles ; permeability ; polyethylene glycol ; porosity ; scanning electron microscopy ; transmission electron microscopy ; X-ray diffraction ; zinc
Language	English
Dates of publication	2020-0301
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	194516-6
ISSN	0376-7388
ISSN	0376-7388
DOI	10.1016/j.memsci.2019.117644
Database	NAL-Catalogue (AGRICOLA)

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Article: Strengthening flash light effect with a pond-tubular hybrid photobioreactor to improve microalgal biomass yield

Xu, Junchen / Cheng, Jun / Xin, Kai / Xu, Jinhui / Yang, Weijuan

Bioresource technology. 2020 Dec., v. 318

2020

Abstract	Poor light utilization efficiency and large occupied area of traditional raceway pond photobioreactors result in low areal microalgal biomass yield in industrial applications. In this study, a pond-tubular hybrid photobioreactor (PTH-PBR) comprising raceway ponds and horizontal tubes was developed to strengthen flash light effect and improve areal microalgal biomass yield. The highest flash cycle frequency (0.63 Hz) of microalgae cells along flow pathway was obtained in the raceway pond of PTH-PBR when shaded area percentage was 20% and ratio of adjacent tube interval to tube diameter was 1, which enhanced microalgal biomass yield by 31.2% than traditional raceway pond. Meanwhile, intracellular chlorophyll content increased by 33.6% and PSII maximum quantum yield (Fᵥ/Fₘ) increased by 8.1% due to decreased photoinhibition stress. The areal microalgal biomass yield of PTH-PBR was 54.7% higher than that of traditional raceway pond without horizontal tubes.
Keywords	biomass production ; chlorophyll ; hybrids ; microalgae ; photobioreactors ; photoinhibition ; photosystem II
Language	English
Dates of publication	2020-12
Publishing place	Elsevier Ltd
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	1065195-0
ISSN	1873-2976 ; 0960-8524
ISSN (online)	1873-2976
ISSN	0960-8524
DOI	10.1016/j.biortech.2020.124079
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Research on a Bearing Fault Enhancement Diagnosis Method with Convolutional Neural Network Based on Adaptive Stochastic Resonance.

Wang, Chen / Qiao, Zijian / Huang, Zhangjun / Xu, Junchen / Fang, Shitong / Zhang, Cailiang / Liu, Jinjun / Zhu, Ronghua / Lai, Zhihui

Sensors (Basel, Switzerland)

2022 Volume 22, Issue 22

Abstract: As a powerful feature extraction tool, a convolutional neural network (CNN) has strong adaptability for big data applications such as bearing fault diagnosis, whereas the classification performance is limited when the quality of raw signals is poor. In ... ...

Abstract	As a powerful feature extraction tool, a convolutional neural network (CNN) has strong adaptability for big data applications such as bearing fault diagnosis, whereas the classification performance is limited when the quality of raw signals is poor. In this paper, stochastic resonance (SR), which provides an advanced feature enhancement approach for weak signals with strong background noise, is introduced as a data pre-processing method for the CNN to improve its classification performance. First, a multiparameter adjusting bistable Duffing system that can achieve SR under large-parameter weak signals is introduced. A hybrid optimization algorithm (HOA) combining the genetic algorithm (GA) and the simulated annealing (SA) is proposed to adaptively obtain the optimized parameters and output signal-to-noise ratio (SNR) of the Duffing system. Therefore, the data optimization based on the multiparameter-adjusting SR of Duffing system can be realized. An SR-based mapping method is further proposed to convert the outputs of the Duffing system into grey images, which can be further processed by a normal CNN with batch normalization (BN) layers and dropout layers. After verifying the feasibility of the HOA in multiparameter optimization of the Duffing system, the bearing fault data set from the CWRU bearing data center was processed by the proposed fault enhancement classification and identification method. The research showed that the weak features of the bearing signals could be enhanced significantly through the adaptive multiparameter optimization of SR, and classification accuracies for 10 categories of bearing signals could achieve 100% and those for 20 categories could achieve more than 96.9%, which is better than other methods. The influences of the population number on the classification accuracies and calculation time were further studied, and the feature map and network visualization are presented. It was demonstrated that the proposed method can realize high-performance fault enhancement classification and identification.
MeSH term(s)	Algorithms ; Neural Networks, Computer ; Vibration
Language	English
Publishing date	2022-11-11
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s22228730
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Article ; Online: Factors affecting the outcome of full pulpotomy in permanent posterior teeth diagnosed with reversible or irreversible pulpitis.

Zhang, Min / Xiong, Yuhua / Wang, Xuerong / Wang, Yunqin / Cai, Yixin / Xu, Junchen / Zhang, Chengfei / Li, Jin

Scientific reports

2022 Volume 12, Issue 1, Page(s) 20280

Abstract: This study aimed to investigate the factors affecting the success rate of full pulpotomy in permanent posterior teeth with pulpitis. The study included 105 permanent posterior teeth clinically diagnosed as reversible or irreversible pulpitis in 92 ... ...

Abstract	This study aimed to investigate the factors affecting the success rate of full pulpotomy in permanent posterior teeth with pulpitis. The study included 105 permanent posterior teeth clinically diagnosed as reversible or irreversible pulpitis in 92 patients aged 18-82 years. All teeth underwent a full pulpotomy using mineral trioxide aggregate as a capping material and were recalled for clinical and radiographic evaluation at 3, 6, 12, and 24 months postoperatively. The overall success rate after the 12-month review was above 90%, and failed cases mainly occurred during the first 12 months after treatment. In this study, the treatment outcome of pulpotomy was not related to sex, or tooth position and the cause of pulpitis. To analyze the influence of age on the treatment outcome, all the teeth were allocated to three groups: group 1 (18-39 years); group 2 (40-59 years); and group 3 (≥ 60 years). A significant difference in success rate was found between groups 1 and 3 (P = 0.014). These results suggest that pulpotomy can be used as an alternative treatment for permanent mature teeth diagnosed with pulpitis and that aging is one factor affecting the treatment outcome.
MeSH term(s)	Humans ; Pulpitis/diagnostic imaging ; Pulpitis/surgery ; Pulpotomy/methods ; Dentition, Permanent ; Treatment Outcome
Language	English
Publishing date	2022-11-24
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-022-24815-0
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Article: Spermidine enhanced resistance of Chlorella to high levels of CO2 and light intensity for improving photosynthetic growth rate

Zhang, Xiangdong / Cheng, Jun / Lu, Hongxiang / Chu, Feifei / Xu, Junchen / Wang, Xuebin / Cen, Kefa

RSC advances. 2019 Aug. 23, v. 9, no. 45

2019

Abstract: In order to promote the photosynthetic growth rate of Chlorella in the presence of flue gas CO2 from coal-fired power plants, spermidine was first used to enhance cellular resistance to a high CO2 concentration (15%) and high light intensity (30 000 lux). ...

Abstract	In order to promote the photosynthetic growth rate of Chlorella in the presence of flue gas CO2 from coal-fired power plants, spermidine was first used to enhance cellular resistance to a high CO2 concentration (15%) and high light intensity (30 000 lux). It was found that low concentrations (100–300 μM) of spermidine significantly enhanced the photosynthetic growth rate of Chlorella. The accelerated cell division decreased the cell diameter from 3.64 μm to 2.71 μm and the fractal dimension from 1.60 to 1.49, and the activity of total superoxide dismutase (T-SOD) increased from 0.48 U mL−1 to 5.33 U mL−1. Expression levels of key enzymes of photosystems I and II, ATP synthase and transportase markedly increased, thereby enhancing the electron transport and energy supply that reduced oxidative damage. Finally, an enhanced cellular resistance to the high CO2 concentration and high light intensity increased the biomass yield from 0.11 g L−1 to 1.71 g L−1 (300 μM).
Keywords	Chlorella ; H+/K+-exchanging ATPase ; H-transporting ATP synthase ; biomass production ; carbon dioxide ; cell division ; coal ; electron transfer ; energy ; flue gas ; fractal dimensions ; light intensity ; photosynthesis ; power plants ; spermidine ; superoxide dismutase
Language	English
Dates of publication	2019-0823
Size	p. 26495-26502.
Publishing place	The Royal Society of Chemistry
Document type	Article
ISSN	2046-2069
DOI	10.1039/c9ra05152j
Database	NAL-Catalogue (AGRICOLA)

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