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23 results on '"Li, Junzhang"'

5. Where is the Best Autonomous Vehicle Interactive Display Place When Meeting a Manual Driving Vehicle in Intersection?

Author

Li, Junzhang, Guo, Haowen, Pan, Shuyu, Tan, Hao, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, and Rau, Pei-Luen Patrick, editor

Published
2021
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9. Studies on the influencing factors and prediction of product star change in the process of e-commerce transaction based on BP neural network and VAR models

Author

Chen Yimeng, Wang Yue, Duan Xingyin, and Li Junzhang

Subjects
Environmental sciences, GE1-350
Abstract

Based on the data of reviews and scores of pacifiers sold in Amazon online market from February 2011 to August 2015, this paper extracts the text emotion words and the deviation degree of text content from the theme through the LDA theme model, and then combines the text length, based on VAR model to analyze the impact of the overall star level volatility of the market by comment length, text emotional words and topic deviation. Further, this study compare the prediction of star level by VAR model and BP neural network model, and finally put forward a more stable prediction model.

Published
2021
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11. Pyrolysis and combustion characteristics of boric acid and borax treated decorative bamboo filaments

Author

Benhua Fei, Yang Zhibin, Li Hui, Li Junzhang, Wang Xiao, Gu Zhongchun, Jun Jiang, and Xinxin Ma

Subjects
0106 biological sciences, Smoke, Thermogravimetric analysis, Environmental Engineering, Borax, Bioengineering, Combustion, 01 natural sciences, humanities, Boric acid, chemistry.chemical_compound, chemistry, 010608 biotechnology, Cone calorimeter, Waste Management and Disposal, Pyrolysis, Nuclear chemistry, Fire retardant
Abstract

A cone calorimeter and thermogravimetric analysis were used in this work to determine the combustion and pyrolysis characteristics of decorative bamboo filaments before and after being treated with boric acid and borax (1:1) flame-retardants. The kinetics were calculated using the Coates-Redfern model. The results showed that in comparison to the control sample, the flame combustion time decreased from 52 s to 40 s, and the peak value of the heat release rate (PKHRR) and total heat release (THR) of the boric acid and borax treated samples were significantly decreased, by 21.0% and 22.2%, respectively. The peak value of the smoke release rate (PKSPR), total smoke production (TSP), and the specific extinction area (ASEA) were reduced substantially, by 90.6%, 93.3%, and 93.0%, respectively. After the boric acid and borax (1 to 1 ratio) flame retardant treatment, the pyrolysis range, the mass loss, the maximum mass loss rate, and the corresponding peak temperature of the samples all significantly decreased with the same heating rate. The activation energy of the BB-treated samples was higher than the control group, which indicated the boric acid and borax flame retardant had flame retardant efficiency.

Published
2020

16. Sers Imaging of Nasopharyngeal Carcinoma Markers Using an Antibody-Conjugated Gold Nanoparticles Probe

Author

Li Junzhang, Guokai Feng, Mu Sheng Zeng, Zhou Yusong, Du Yuqiang, and Y. B. Du

Subjects
biology, Chemistry, Cell, Nanoprobe, 02 engineering and technology, Conjugated system, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, medicine.disease, 01 natural sciences, 0104 chemical sciences, Staining, Highly sensitive, stomatognathic diseases, medicine.anatomical_structure, Nasopharyngeal carcinoma, Colloidal gold, otorhinolaryngologic diseases, medicine, biology.protein, Biophysics, Antibody, 0210 nano-technology, Spectroscopy
Abstract

Surface-enhanced Raman scattering (SERS) nanotags as an ultrasensitive nanoprobe is becoming popular for the detection of biomarkers. Herein, antibody-conjugated gold nanoparticles (AuNPs) were used to target LMP2A in an LMP2A-infected CNE2 cell line. SERS maps showed that the LMP2A was distributed around the cell, which was consistent with the results of immunofl uorescence staining in the previous report. This location could be due to the specific binding of the bioconjugated nanotags to the receptors on the cell surface. However, the CNE2 cell line without LMP2A-infected showed no detectable signal at 1044 cm–1. The results demonstrated the potential feasibility of AuNPs nanotags as highly sensitive probes conjugated at the subcellular level for detection and localization of cancer markers in nasopharyngeal carcinoma (NPC).

Published
2017

22. Improving the gelation and digestive properties of myofibrillar protein in Litopenaeus vannameiby ultra-high pressure

Author

Zhang, Kexin, Li, Na, Li, Junzhang, Wang, Yefan, Liu, Chang, Liu, Yuxin, Liu, Xiaoyang, Zhou, Dayong, and Li, Deyang

Abstract

The objective of this study was to investigate the effects of ultra-high pressure (UHP) on the physicochemical properties, gelling properties, and in vitrodigestion characteristics of myofibrillar protein (MP) in Litopenaeus vannamei. The pressures were set at 0, 150, 300, 450, and 600 MPa, respectively. The α-helix structure gradually unfolded and transformed into β-sheet structure as the pressure increased from 0 to 600 MPa. Compared with the control group, the content of α-helix structure of the 600 MPa-treated MP samples decreased by 51.31%, and the content of β-sheet structure increased by a 1.34-fold. In addition, the UHP treatment enhanced the rheological properties of MP. The elastic modulus (G′) and viscous modulus (G″) of the 600 MPa-treated MP samples increased by 4.77-fold and 3.78-fold, respectively, compared with the control group (at frequencies up to 10 Hz). The gel properties of the MP also increased significantly after UHP treatment, e.g., the WHC of MP gel increased by 45.49% and the gel strength increased by a 5.99-fold when the pressure reached 600 Mpa, compared with the control group. The results of in vitrosimulated digestion showed that UHP treatment led to the formation of more easily digestible MP gels. Compared with the control group, the 600 MPa-treated MP gel samples showed a 1.89-fold increase in digestibility and a 66.86% decrease in digestible particle size.

Published
2023
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23. Enhanced reduction of C-N multiple bonds using sodium borohydride and an amorphous nickel catalyst.

Author

Liu S, Yang Y, Zhen X, Li J, He H, Feng J, and Whiting A

Subjects
Catalysis, Oxidation-Reduction, Substrate Specificity, Borohydrides chemistry, Carbon chemistry, Nickel chemistry, Nitrogen chemistry
Abstract

Amorphous nickel powder (Ni(0)) was utilised as a catalyst under mild, aqueous, basic conditions for enhancing the sodium borohydride-mediated reduction of C-N multiple bonds such as oximes, imines, hydrazones and nitriles to produce the corresponding amines in good to excellent yields.

Published
2012
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