136 results on '"Zhang, Zifan"'
Search Results
102. Renovation of Automation System Based on Industrial Internet of Things: A Case Study of a Sewage Treatment Plant
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Zhu, Wanhao, primary, Wang, Zhidong, additional, and Zhang, Zifan, additional
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- 2020
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103. Morphological and photosynthetic responses differ among eight apple scion-rootstock combinations
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Zhou, Yanmin, primary, Tian, Xue, additional, Yao, Jiaojiao, additional, Zhang, Zifan, additional, Wang, Yi, additional, Zhang, Xinzhong, additional, Li, Wei, additional, Wu, Ting, additional, Han, Zhenhai, additional, Xu, Xuefeng, additional, and Qiu, Changpeng, additional
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- 2020
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104. Intelligent Distribution Network Information Processing Based on Power Data Virtual Plane
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Wang, Zhidong, primary, Ni, Yingdong, additional, Zhang, Zifan, additional, Wang, Gan, additional, Chen, Zhifeng, additional, Deng, Fengqiang, additional, Pu, Zhengbin, additional, Yang, Ling, additional, Zhang, Yongjun, additional, Feng, Ruijue, additional, and Guo, Lin, additional
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- 2020
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105. Sentiment Analysis of Chinese Commodity Reviews Based on Deep Learning
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Zhang, Zifan, primary
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- 2020
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106. Variation of drag coefficient with wind wave development
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Zhang, Zifan and Li, Jiachun
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- 1998
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107. Trends in chemical composition of precipitation in Nanjing, China, during 1992–2003
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Tu, Jun, Wang, Hesheng, Zhang, Zifan, Jin, Xin, and Li, Wenqing
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- 2005
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108. Study on Grid-Connected Strategy of Distribution Network with High Hydropower Penetration Rate in Isolated Operation
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Changxing Guo, Zhang Zifan, Chen Zhifeng, Wang Zhidong, Na Shen, and Wang Gan
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island operation ,small hydropower ,Computer science ,020209 energy ,Bioengineering ,02 engineering and technology ,lcsh:Chemical technology ,Automotive engineering ,Synchronization (alternating current) ,lcsh:Chemistry ,Electric power system ,0202 electrical engineering, electronic engineering, information engineering ,Grid connection ,Chemical Engineering (miscellaneous) ,lcsh:TP1-1185 ,Hydropower ,grid-connected strategy ,Small hydro ,business.industry ,Process Chemistry and Technology ,020208 electrical & electronic engineering ,Grid ,Renewable energy ,lcsh:QD1-999 ,Distributed generation ,business - Abstract
As the largest global renewable source, hydropower is a useful supplement to mountainous distribution networks with abundant water resources, and shoulders a large portion of the regulation duty in many power systems. In particular, in the form of decentralized energy sources located to their customers, small hydropower (SHP) improve grid stability by diversifying the electricity system and reducing power loss. The mountainous distribution networks supplied by small hydropower are closed-loop design but open-loop operation, which easily causes the tripping of tie line even further the off-grid operation of small hydropower system. Once the tie line trips, the current countermeasures&mdash, such as hydropower shutdown and load shedding&mdash, do not fully guarantee the reliability of power supply and the utilization efficiency of hydropower. This paper studies the amplitude-frequency characteristics of SHP off-grid, according to the typical integration of hydropower in South China, a SHP on-grid/off-grid model is established based on the Power Systems Computer Aided Design (PSCAD) platform. It is found that due to the inertia of SHP, the amplitude-frequency characteristics of SHP island system are relatively slow, and the process of non-synchronization with the main grid is gradually expanded. The characteristic of SHP has a certain degree of synchronization with the main grid in the initial island operates stage, which helps to find a novel grid connection method. This paper further proposes the strategy of using fast busbar automatic transfer switch (BATS), which quickly connect the trip-off SHP to the distribution network under the condition of permitting distributed energy grid-connected. The PSCAD simulation results show that proposed strategy has a limited impact on the power grid and prove the effectiveness of the method.
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- 2019
109. Zwitterionic Surfactant for EOR in Tight Carbonate Reservoir: Physico-Chemical Interaction and Microfluidic Study
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Zhang, Zifan
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- 2019
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110. In situ α-Fe2O3 modified La2Ti2O7 with enhanced photocatalytic CO2 reduction activity.
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Zhang, Zifan, Lin, Yuan, Liu, Qianwen, Wang, Xuxu, Fu, Xianzhi, and Su, Wenyue
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- 2021
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111. Morphological and photosynthetic responses differ among eight apple scion-rootstock combinations
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Zhang Zifan, Tian Xue, Zhenhai Han, Yao Jiaojiao, Xinzhong Zhang, Ting Wu, Xuefeng Xu, Yi Wang, Zhou Yanmin, Wei Li, and Changpeng Qiu
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Canopy ,Malus ,biology ,Starch ,Horticulture ,Photosynthesis ,biology.organism_classification ,Photosynthetic capacity ,Dwarfing ,chemistry.chemical_compound ,chemistry ,Rootstock ,Chlorophyll fluorescence - Abstract
‘Red Fuji’ apple (Malus × domestica Borkh.) scions were grafted onto eight size-controlling rootstock combinations (dwarfing, semi-dwarfing, and vigorous types). During the third year after grafting, morphological and physiological parameters, such as growth, hydraulic conductance, non-structural carbohydrates, gas exchange and chlorophyll fluorescence, as well as leaf anatomy, were examined and instantaneous whole-canopy photosynthetic assimilation was modelled. Compared with Baleng, rootstocks M.9 and B.9 resulted in reduced growth vigour and photosynthetic capacity. Significantly lower soil-to-leaf hydraulic conductance, stomatal density and palisade/spongy parenchyma ratios were also observed in ‘Red Fuji’ grafted on M.9 and B.9. We propose that the down-regulated hydraulic conductance contributed to the decline in photosynthetic rate, which in turn caused a reduction in instantaneous whole-canopy photosynthetic assimilation. These results provide evidence that the limited photosynthetic capacity and leaf area are major causes of the reduced canopy photosynthetic assimilation observed in M.9 and B.9 grafted apple trees. The reduced photosynthetic assimilation may partly result from a sustained lower photochemical efficiency. However, dwarfing and semi-dwarfing rootstocks grafted plants contained more starch, which may be a significant factor underlying the observed advanced precocity.
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- 2020
112. On-line management method of protection setting integrity following IEC61850
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LI Zhifeng, Yang Ling, LI Zetao, Wang Zhidong, Liu xi, Wang Gan, Deng Fengqiang, Guo Lin, Liang Mei, and Zhang Zifan
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Electric power system ,Correctness ,Computer science ,020209 energy ,Reliability (computer networking) ,Protective relay ,Management system ,0202 electrical engineering, electronic engineering, information engineering ,Process control ,02 engineering and technology ,Intelligent electronic device ,Telecommunications network ,Reliability engineering - Abstract
With the development of intelligent substation, substations rely more on network communication to transmit substation information. High substation automations with reliable communication avoid the traditional complicated operation which needs to be done manually, and improve the efficiency of substation operation. But higher requirements for the reliability of information integrity are put forward. The protection setting of intelligent substation directly affects the correctness of the protection devices (Intelligent Electronic Device) and further affects the normal operation of the entire power system. Because the protection setting of protective devices is affected by power system operation mode, season climate and many other factors, the protection setting often needs to be adjusted. When the number of protection devices in substation is increasing rapidly, the frequent change of the protection setting can easily cause the missing or omission of protection setting for certain protection devices, resulting in the potential danger of the power system. On view of the above problems, combined with the development trend of IEC61850, this paper focuses on the on-line management of protection devices. By studying the data attribute of the online management of protection device settings and combining the layered network structure of the intelligent substation, the online management system for protection device settings is constructed, with the aim to eliminate the hidden danger caused by the missing or omission of protection setting.
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- 2018
113. Research on the Amplitude-frequency Characteristics and Grid-connected Strategy of High-permeability Hydroelectric Isolated Networks
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Zhang Zifan, Chen Zhifeng, Wang Gan, Guo Changxing, Wang Zhidong, and Shen Na
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Small hydro ,Computer science ,business.industry ,020209 energy ,02 engineering and technology ,Grid ,Automotive engineering ,Amplitude ,Hydroelectricity ,0202 electrical engineering, electronic engineering, information engineering ,Grid connection ,Torque ,Power grid ,business ,Hydropower - Abstract
For power grids with abundant small hydropower in China, the efficient switching process between small hydropower and distribution network will help to reduce the user outage time and the cutting of hydropower and load. This paper mainly adopts the simulation method combined with the regulation characteristics of small hydropower in rural areas. And the paper focuses on the amplitude and frequency characteristics of the initial stage of small hydropower. Firstly, the operation characteristics of small hydropower plants are studied, and the simulation model is built. Next, we study the amplitude frequency characteristics of small hydropower stations with better control capability such as leading phase operation. Further, in view of the large number of small hydropower stations with no phase operation capability in the rural power grid, we studied the simulation in the initial stage of the isolated network. By comparing and analyzing the operation characteristics of small hydropower stations at different initial stages under different conditions, it can provide support for small hydropower stations to reconnect into distribution network as soon as possible. This will help to reduce the tedious and long process of grid connection in the rural power grid.
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- 2018
114. Study on Grid-Connected Strategy of Distribution Network with High Hydropower Penetration Rate in Isolated Operation
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Zhang, Zifan, primary, Wang, Zhidong, additional, Chen, Zhifeng, additional, Wang, Gan, additional, Shen, Na, additional, and Guo, Changxing, additional
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- 2019
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115. Design of Multi-sensor Information Fusion in Deceleration Early Warning System
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Cao, Xin, primary, Chu, Na, additional, Liu, Dan, additional, Zhang, Zifan, additional, and Lin, Hao, additional
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- 2019
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116. Existence of echo wave in the coupled-Oregonator system
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Zheng, Zuo-Huan, Zhou, Tianshou, Zhang, Zifan, and Zhang, Suochun
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- 2002
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117. In situα-Fe2O3modified La2Ti2O7with enhanced photocatalytic CO2reduction activityElectronic supplementary information (ESI) available. See DOI: 10.1039/d1cy01275d
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Zhang, Zifan, Lin, Yuan, Liu, Qianwen, Wang, Xuxu, Fu, Xianzhi, and Su, Wenyue
- Abstract
Developing high-efficiency photocatalysts for CO2photoreduction is one of the potential solutions to address both energy and pollution issues. In this study, α-Fe2O3modified La2Ti2O7was successfully synthesized with intimate contact between La2Ti2O7and α-Fe2O3, greatly facilitating the carrier separation and transfer during the photocatalytic reaction. The activity and stability for photocatalytic CO2reduction over α-Fe2O3/La2Ti2O7were significantly improved as compared with the La2Ti2O7substrate. The optimized 3% α-Fe2O3/ La2Ti2O7composite showed excellent CO2reduction activity after 5 h consecutive illumination, and the total utilized photoelectron number (UPN) reached 7.76 μmol, which was about 4.4 times higher than that of the pristine La2Ti2O7. The steady-state photoluminescence spectra, time-resolved photoluminescence spectra (TRPL) and photocurrent response results showed that the improved charge separation efficiency was the key factor to enhance the photocatalytic activity. This work provides novel insights into the design and fabrication of photocatalysts of high performance for CO2reduction for solar-to-energy applications.
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- 2021
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118. Identification of low-light induced genes in cucumber (Cucumis sativus) seedlings by suppression subtractive hybridization
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Guoquan Mi, Liying Liu, Huazhong Ren, Zhang Zifan, and J.W. Dang
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Genetics ,Expressed sequence tag ,Light intensity ,biology ,cDNA library ,Suppression subtractive hybridization ,Complementary DNA ,GenBank ,Horticulture ,biology.organism_classification ,Gene ,Cucumis - Abstract
Cucumber is one of the most important vegetables that are very sensitive to low-light stress. The specific mechanism involved is poorly understood. Here we investigate the expression profile of genes induced by low-light stress in Cucumis sativus seedlings with suppression subtractive hybridization (SSH). cDNA prepared from cucumber seedlings treated with 100 μmol m −2 s −1 light intensity as testers and cDNA from unstressed cucumber seedlings with 800 μmol m −2 s −1 light intensity as drivers. A forward subtractive cDNA library was constructed, from which 768 recombinant colonies were picked and amplified. Through differential screening of the subtractive cDNA library, 246 clones were identified as low-light stress induced. After sequencing, 64 unique expressed sequence tags (ESTs) were obtained by clustering and blast analysis, which included some functionally unknown transcripts. Of the 64 ESTs, 50 ESTs identity to their homolog in GenBank, 14 ESTs were expected to be novel genes. The ESTs with significant protein homology were sorted into 16 groups according to the functional categories of the Arabidopsis proteins.
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- 2008
119. Healthcare Information System Architecture Design Based on Big Data
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Zhang, Zifan, primary
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- 2017
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120. Communication Efficiency and Security for Multi-Agent Reinforcement Learning
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Zhang, Zifan
- Subjects
- Computer Engineering
- Abstract
In multi-agent reinforcement learning (MARL) settings, there are various strategies that are quite effective. One the of key components among these strategies is the policy evaluation (PE) part of consensus-based actor-critic (AC) algorithms. In PE problems, agents are trained with a given policy and share their observations or states with neighbors, while the policy remains fixed over time. However, two significant challenges arise in such a setting: ensuring secure communications and lowering communication complexity. In real-life scenarios, communications face security risks, with Byzantine attacks being the most common type of attack. Malicious agents can generate arbitrary values to deceive honest agents, resulting in serious training failures such as incorrect models, privacy leakage, and hardware malfunction. To address this, cooperative MARL settings commonly use universal aggregation rules, such as mean or median aggregation, to filter out or minimize the impact of suspicious values. Additionally, two natural ideas to reduce communication complexity in policy evaluation settings are using batch sampling to reduce the variance of Temporal Difference (TD) errors and local training steps between communication rounds. Although local training may slightly reduce training accuracy, it significantly lowers communication frequency and allows for faster training than vanilla strategies. While TD learning with batching has been explored in previous work, we focus on TD learning with local updates in this paper. Specifically, we investigate the robustness of several algorithms against Byzantine attacks in a consensus-based MARL cooperative setting and study the potential of local training in reducing communication complexity. Experiments on cooperative navigation tasks have been conducted to support our investigations and compared the results with baseline algorithms.
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- 2023
121. Periodic solution and global structure of Oregonator
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Zhang Suo-chun, Zhou TianShou, Zheng Zuo-Huan, and Zhang Zifan
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General Mathematics ,Applied Mathematics ,Mathematical analysis ,General Physics and Astronomy ,Statistical and Nonlinear Physics ,Global structure ,Nonlinear Sciences::Pattern Formation and Solitons ,Oregonator ,Mathematics - Abstract
In this paper, we studied the periodic solution, connecting orbits between singular points and global structure in Oregonator.
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- 2000
122. Exploit the scale of big data for data privacy: An efficient scheme based on distance-preserving artificial noise and secret matrix transform
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Li, Xiaohua, primary and Zhang, Zifan, additional
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- 2014
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123. Two-parameter-dependent drag coefficient over sea surface by turbulent modeling
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Li, Jiachun, primary and Zhang, Zifan, additional
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- 1999
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124. Preparation and selectivity evaluation of grafted temperature-responsive imprinted composite polyvinylidene fluoride resin membranes for selective adsorption of ReO4−.
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Zhang, Jun, Ou, Xiaojian, Li, Lin, Chen, Qianqian, Zhang, Zifan, Huo, Ting, Lin, Xiaoyu, Niu, Fangfang, Zhao, Shengyuan, We, Fang, Li, Hui, Liu, Chunli, Chen, Zhenbin, Lu, Sujun, Zhang, Peng, and Zhu, Jinian
- Subjects
- *
POLYVINYLIDENE fluoride , *COMPOSITE membranes (Chemistry) , *FOURIER transform infrared spectroscopy , *ADSORPTION (Chemistry) , *ADSORPTION capacity , *ACRYLIC acid , *JET engines - Abstract
Purpose: A novel grafted temperature-responsive ReO4− Imprinted composite membranes (Re-ICMs) was successfully prepared by using polyvinylidene fluoride (PVDF) resin membranes as substrates, this study aimed to separate and purify ReO effectively. Design/methodology/approach: Re-ICMs were synthesized by PVDF resin membranes as the substrate, acrylic acid (AA), acrylamide (AM), ethylene glycol dimethacrylate (EGDMA) were functional monomers. The morphology and structure of Re-ICMs were characterized by scanning electron microscope and Fourier transform infrared spectroscopy. Findings: The maximum adsorption capacity toward ReO4− was 0.1,163 mmol/g and the separation decree had relation to MnO4− was 19.3. The optimal operation conditions were studied detailedly and the results as follows: the molar ratios of AA, AM, EGDMA, ascorbic acid, NH4ReO4, were 0.8, 0.96, 0.02, 0.003 and 0.006. The optimal time and temperature were 20 h and 40°C, respectively. The Langmuir and pseudo-second-order models were fit these adsorption characteristics well. Practical implications: Rhenium (Re) is mainly used to chemical petroleum and make superalloys for jet engine parts. This study was representing a technology in separate and purify of Re, which provided a method for the development of the petroleum and aviation industry. Originality/value: This contribution provided a novel method to separate ReO4− from MnO4−. The maximum adsorption capacity was 0.1163 mmol/g at 35°C and the adsorption equilibrium time was within 2 h. Meanwhile, the adsorption selectivity rate ReO4−/MnO4− was 19.3 and the desorption rate was 78.3%. Controlling the adsorption experiment at 35°C and desorption experiment at 25°C in aqueous solution, it could remain 61.3% of the initial adsorption capacity with the adsorption selectivity rate of 13.3 by 10 adsorption/desorption cycles, a slight decrease, varied from 78.3% to 65.3%, in desorption rate was observed. [ABSTRACT FROM AUTHOR]
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- 2023
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125. Synergistic effects of xanthan gum and β-cyclodextrin on properties and stability of vegetable oil-based whipped cream.
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Wu S, Wang C, Liu C, He Q, Zhang Z, and Ma T
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- Hydrophobic and Hydrophilic Interactions, beta-Cyclodextrins chemistry, Polysaccharides, Bacterial chemistry, Plant Oils chemistry, Emulsions chemistry
- Abstract
The synergistic effects between xanthan gum (XG) and β-cyclodextrin (β-CD) on the properties and stability of vegetable oil-based whipped cream stabilized by kidney bean protein aggregates was investigated. The visual appearance, SEM, TEM, CLSM, FT-IR and LF-NMR results showed that when the ratio of XG to β-CD in the XG-β-CD complex was appropriate, the hydrogen bonding effect between β-CD and XG was significant enhanced, the three-dimensional network structure has the highest density, the emulsion droplets were the smallest and evenly distributed. The unique tapered microstructure of β-CD acted as a bridge between the hydrophilic and hydrophobic components, effectively preventing the aggregation of oil droplets and establishing a flexible support system between oil droplets; while the flexible molecular structure of XG could support Pickering emulsion system. The XG-β-CD complex had a synergistic effect with protein aggregates, making it ideal for use in whipped cream products. This study explored the stability mechanism of β-CD in the Pickering emulsion-based whipped cream system, providing valuable insights into producing whole plant-based whipped cream by texturizing highly unsaturated oils. This effectively solves the problem of inadequate intake of unsaturated oil for individuals who consume excessive amounts of animal-derived fats., Competing Interests: Declaration of competing interest The authors declared that they have no conflicts of interest to this work. We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted., (Copyright © 2024 Elsevier B.V. All rights reserved.)
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- 2024
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126. Enhancement of non-covalent interaction between soy protein isolate and quercetin by sodium alginate.
- Author
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Li T, Zhang Y, Shao J, Hou R, Zhang Z, Ye C, Wang H, Zhu B, and Zhang Y
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- Molecular Dynamics Simulation, Protein Binding, Alginates chemistry, Soybean Proteins chemistry, Quercetin chemistry, Molecular Docking Simulation, Hydrophobic and Hydrophilic Interactions
- Abstract
Effects of sodium alginate (SA) on the non-covalent interaction between soybean protein isolate (SPI) and quercetin (Que) were investigated by multispectral technology, molecular docking and dynamics simulation technology. Structural alterations of the binary complexes were observed after SA addition, characterized by a red shift of maximum fluorescence emission wavelength. The introduction of 0.1% (w/v) SA led to a reduction of 12.3% in the α-helix and β-sheet structures, accompanied by 12.6% increase in the β-turn and random coil conformations. The binding of SA to SPI provided electrostatic interactions and facilitated the subsequent binding of SPI to Que. Molecular docking confirmed that hydrophobic interactions and electrostatic interactions were also the main driving force. Molecular dynamics simulation emphasized that the ternary complexes with SA exhibited greater stability compared to the binary ones. The foaming and emulsifying properties of SPI-Que complexes were enhanced by 33.76% and 68.28%, respectively, due to the addition of SA., Competing Interests: Declaration of competing interest The authors declared that they have no conflicts of interest to this work., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
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- 2024
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127. Exosomes derived from tendon stem/progenitor cells enhance tendon-bone interface healing after rotator cuff repair in a rat model.
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He Y, Lu S, Chen W, Yang L, Li F, Zhou P, Chen Z, Wan R, Zhang Z, Sun Y, Lin J, Chen Y, Luo Z, Xu C, and Chen S
- Abstract
The rate of retear after surgical repair remains high. Mesenchymal stem cells (MSCs) have been extensively employed in regenerative medicine for several decades. However, safety and ethical concerns constrain their clinical application. Tendon Stem/Progenitor Cells (TSPCs)-derived exosomes have emerged as promising cell-free therapeutic agents. Therefore, urgent studies are needed to investigate whether TSPC-Exos could enhance tendon-bone healing and elucidate the underlying mechanisms. In this study, TSPC-Exos were found to promote the proliferation, migration, and expression of fibrogenesis markers in BMSCs. Furthermore, TSPC-Exos demonstrated an ability to suppress the polarization of M1 macrophages while promoting M2 macrophage polarization. In a rat model of rotator cuff repair, TSPC-Exos modulated inflammation and improved the histological structure of the tendon-bone interface, the biomechanical properties of the repaired tendon, and the function of the joint. Mechanistically, TSPC-Exos exhibited high expression of miR-21a-5p, which regulated the expression of PDCD4. The PDCD4/AKT/mTOR axis was implicated in the therapeutic effects of TSPC-Exos on proliferation, migration, and fibrogenesis in BMSCs. This study introduces a novel approach utilizing TSPC-Exos therapy as a promising strategy for cell-free therapies, potentially benefiting patients with rotator cuff tear in the future., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors.)
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- 2024
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128. Insights into the defensive roles of lncRNAs during Mycoplasma pneumoniae infection.
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Yang Z, Zhou J, Su N, Zhang Z, Chen J, Liu P, and Ling P
- Abstract
Mycoplasma pneumoniae causes respiratory tract infections, affecting both children and adults, with varying degrees of severity ranging from mild to life-threatening. In recent years, a new class of regulatory RNAs called long non-coding RNAs (lncRNAs) has been discovered to play crucial roles in regulating gene expression in the host. Research on lncRNAs has greatly expanded our understanding of cellular functions involving RNAs, and it has significantly increased the range of functions of lncRNAs. In lung cancer, transcripts associated with lncRNAs have been identified as regulators of airway and lung inflammation in a process involving protein complexes. An excessive immune response and antibacterial immunity are closely linked to the pathogenesis of M. pneumoniae . The relationship between lncRNAs and M. pneumoniae infection largely involves lncRNAs that participate in antibacterial immunity. This comprehensive review aimed to examine the dysregulation of lncRNAs during M. pneumoniae infection, highlighting the latest advancements in our understanding of the biological functions and molecular mechanisms of lncRNAs in the context of M. pneumoniae infection and indicating avenues for investigating lncRNAs-related therapeutic targets., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Yang, Zhou, Su, Zhang, Chen, Liu and Ling.)
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- 2024
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129. Effect of polysaccharides on conformational changes and functional properties of protein-polyphenol binary complexes: A comparative study.
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Zhang Z, Li T, Zhang Y, Shao J, Ye C, Wang H, Zhu B, and Zhang Y
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- Polysaccharides chemistry, Antioxidants pharmacology, Alginates chemistry, Quercetin, Amides, Polyphenols, Soybean Proteins chemistry
- Abstract
This study aimed to investigate the effect of different polysaccharides on the binding behavior and functional properties of soybean protein isolate (SPI)-quercetin (Que) complex. The binding behavior was assessed using multi-spectral technique with the Stern-Volmer equation, which confirmed the presence of static fluorescence quenching in Que and SPI. The addition of sodium alginate (SA) resulted in a reduction of the binding affinity between SPI and Que, while dextran (DX) exhibited some promoting effect. A slight blue shift was observed in amide I and amide II bands, indicating the presence of hydrophobic and electrostatic interactions. Circular dichroism spectra revealed the ordered structures transformed into a more disordered state when polysaccharides were added, leading to an increase in random coils (SA: 18.5 %, DX: 15.4 %). Docking and dynamic simulations demonstrated that SA displayed greater stability within the hydrophobic compartments of SPI than DX, increased rigidity and stability of the SPI structure in SPI-Que-SA complexes. Electrostatic forces played a significant role between SPI and SA, while van der Waals forces were the main driving forces in SPI-DX complexes. Overall, the introduction of SA led to a looser and stable structure of SPI-Que complexes, resulting in an improvement of their emulsifying, foaming, and antioxidant properties., Competing Interests: Declaration of competing interest The authors declared that they have no conflicts of interest to this work., (Copyright © 2023. Published by Elsevier B.V.)
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- 2023
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130. Anterior direct decompression significantly relieves spinal cord high signal in patients with ossification of the posterior longitudinal ligament: a case-control study.
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Wu Z, Zhang Z, Xu A, Lu S, Cui C, Sun B, and Liu Y
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- Humans, Male, Female, Middle Aged, Infant, Newborn, Longitudinal Ligaments diagnostic imaging, Longitudinal Ligaments surgery, Case-Control Studies, Osteogenesis, Cervical Vertebrae surgery, Decompression, Surgical, Treatment Outcome, Retrospective Studies, Ossification of Posterior Longitudinal Ligament diagnostic imaging, Ossification of Posterior Longitudinal Ligament surgery, Ossification of Posterior Longitudinal Ligament pathology, Spinal Cord Diseases diagnostic imaging, Spinal Cord Diseases surgery, Hypertension pathology, Hypertension surgery, Diabetes Mellitus surgery, Spinal Fusion methods
- Abstract
Background: In patients with cervical spondylotic myelopathy caused by ossification of the posterior longitudinal ligament, high cord signal (HCS) is frequently observed. However, limited research has investigated the variations in HCS improvement resulting from different surgical approaches. This study aims to explore the potential relationship between the choice of surgical approach and the postoperative improvement of intramedullary high signal in ossification of the posterior longitudinal ligament (OPLL) patients., Methods: We extensively reviewed the patients' medical records, based on which demographic information such as gender, age, and body mass index (BMI) were recorded, and assessed the severity of the patients' neurological status preoperatively and postoperatively by using the Japanese Orthopedic Association score (JOAs), focusing on consecutive preoperative and postoperative Magnetic resonance imaging (MRI) T2WI measurements, to study the statistical correlation between the improvement of HCS and the choice of surgical approach., Results: There were no significant differences in demographic, imaging parameters, and clinical symptoms between patients undergoing anterior and posterior surgery (p > 0.05, Table 1). However, both improvement in JOAs (Recovery2) and improvement in HCS (CR2) were significantly better in the anterior surgery group two years after surgery (p < 0.05, Table 1). Multifactorial logistic regression analysis revealed that posterior surgery and higher preoperative signal change ratio (SCR) were identified as risk factors for poor HCS improvement at the two-year postoperative period (p < 0.05, Table 2). Table 1 Differences in demographic, imaging parameters, and clinical symptoms in patients with anterior and posterior approach Anterior approach Posterior approach P-Values Demographic data Sex (male/female) 10/12 6/17 0.175 Age 58.59 ± 5.68 61.43 ± 9.04 0.215 Hypertension 14/8 14/9 0.848 Diabetes 16/6 19/4 0.425 BMI 25.58 ± 4.72 26.95 ± 4.58 0.331 Smoking history 19/3 16/7 0.175 Preoperative measured imaging parameters Preoperative SCR 1.615 ± 0.369 1.668 ± 0.356 0.623 CR1 0.106 ± 0.125 0.011 ± 0.246 0.08 CNR 0.33 ± 0.073 0.368 ± 0.096 0.15 C2-7 Cobb angle 8.977 ± 10.818 13.862 ± 13.191 0.182 SVA 15.212 ± 8.024 17.46 ± 8.91 0.38 mK-line INT 3.694 ± 3.291 4.527 ± 2.227 0.323 Imaging follow-up 6 months postoperative SCR 1.45 ± 0.44 1.63 ± 0.397 0.149 2 years postoperative SCR 1.26 ± 0.19 1.65 ± 0.35 0.000** CR2 0.219 ± 0.14 - 0.012 ± 0.237 0.000** Clinical symptoms Preoperative JOAs 10.64 ± 1.59 10.83 ± 1.47 0.679 6 months postoperative JOAs 11.82 ± 1.37 11.65 ± 1.4 0.69 2 years postoperative JOAs 14.18 ± 1.01 12.52 ± 2.06 0.001** Recovery1 0.181 ± 0.109 0.128 ± 0.154 0.189 Recovery2 0.536 ± 0.178 0.278 ± 0.307 0.001**
* , statistical significance (p < 0.05). **, statistical significance (p < 0.01) BMI = body mass index. SCR = the signal change ratio between the localized high signal and normal spinal cord signal at the C7-T1 levels. CR1 = the regression of high cord signals at 6 months postoperatively (i.e., CR1 = (Preoperative SCR-SCR at 6 months postoperatively)/ Preoperative SCR). CR2 = the regression of high cord signal at 2 years postoperatively (i.e., CR2 = (Preoperative SCR-SCR at 2 years postoperatively)/ Preoperative SCR). CNR = canal narrowing ratio. SVA = sagittal vertical axis. mK-line INT = modified K-line interval. JOAs = Japanese Orthopedic Association score. Recovery1 = degree of JOAs recovery at 6 months postoperatively (i.e., Recover1 = (JOAs at 6 months postoperatively-Preoperative JOAs)/ (17- Preoperative JOAs)). Recovery2 = degree of JOAs recovery at 2 years postoperatively (i.e., Recover2 = (JOAs at 2 years postoperatively-Preoperative JOAs)/ (17-Preoperative JOAs)) Table 2 Linear regression analyses for lower CR2 values 95% CI P value Uni-variable analyses Demographic data Sex (male/female) - 0.01 0.221 0.924 Age - 0.015 0.003 0.195 Hypertension - 0.071 0.204 0.334 Diabetes - 0.195 0.135 0.716 BMI - 0.375 0.422 0.905 Smoking history - 0.249 0.077 0.295 Surgical approach - 0.349 - 0.113 0.000# Preoperative measured imaging parameters C2-7 Cobb angle - 0.009 0.002 0.185 SVA - 0.008 0.008 0.995 mK-line INT - 0.043 0.005 0.122 Preoperative SCR 0.092 0.445 0.004# CR1 0.156 0.784 0.004# CNR - 0.76 0.844 0.918 Multi-variable analyses Surgical approach - 0.321 - 0.118 0.000** Preoperative SCR 0.127 0.41 0.000** CR1 - 0.018 0.501 0.067# , variables that achieved a significance level of p < 0.1 in the univariate analysis *statistical significance (p < 0.05). **statistical significance (p < 0.01) BMI = body mass index. SCR = the signal change ratio between the localized high signal and normal spinal cord signal at the C7-T1 levels. CR1 = the regression of high cord signals at 6 months postoperatively (i.e., CR1 = (Preoperative SCR-SCR at 6 months postoperatively)/ Preoperative SCR). CR2 = the regression of high cord signal at 2 years postoperatively (i.e., CR2 = (Preoperative SCR-SCR at 2 years postoperatively)/ Preoperative SCR). CNR = canal narrowing ratio. SVA = sagittal vertical axis. mK-line INT = modified K-line interval CONCLUSIONS: For patients with OPLL-induced cervical spondylotic myelopathy and intramedullary high signal, anterior removal of the ossified posterior longitudinal ligament and direct decompression offer a greater potential for regression of intramedullary high signal. At the same time, this anterior surgical strategy improves clinical neurologic function better than indirect decompression in the posterior approach., (© 2023. The Author(s).)- Published
- 2023
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131. Immunization coverage, knowledge, satisfaction, and associated factors of non-National Immunization Program vaccines among migrant and left-behind families in China: evidence from Zhejiang and Henan provinces.
- Author
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Zhou Y, Li D, Cao Y, Lai F, Wang Y, Long Q, Zhang Z, An C, and Xu X
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- Child, Humans, Female, Infant, Vaccination Coverage, Cross-Sectional Studies, Vaccination, Immunization Programs, China, Personal Satisfaction, Transients and Migrants, Viral Vaccines
- Abstract
Background: Migrant and left-behind families are vulnerable in health services utilization, but little is known about their disparities in immunization of non-National Immunization Program (NIP) vaccines. This study aims to evaluate the immunization coverage, knowledge, satisfaction, and associated factors of non-NIP vaccines among local and migrant families in the urban areas and non-left-behind and left-behind families in the rural areas of China., Methods: A cross-sectional survey was conducted in urban areas of Zhejiang and rural areas of Henan in China. A total of 1648 caregivers of children aged 1-6 years were interviewed face-to-face by a pre-designed online questionnaire, and their families were grouped into four types: local urban, migrant, non-left-behind, and left-behind. Non-NIP vaccines included Hemophilus influenza b (Hib) vaccine, varicella vaccine, rotavirus vaccine, enterovirus 71 vaccine (EV71) and 13-valent pneumonia vaccine (PCV13). Log-binomial regression models were used to calculate prevalence ratios (PRs) and 95% confidence intervals (CIs) for the difference on immunization coverage of children, and knowledge and satisfaction of caregivers among families. The network models were conducted to explore the interplay of immunization coverage, knowledge, and satisfaction. Logistic regression models with odds ratios (ORs) and 95% CIs were used to estimate the associated factors of non-NIP vaccination., Results: The immunization coverage of all non-NIP vaccines and knowledge of all items of local urban families was the highest, followed by migrant, non-left-behind and left-behind families. Compared with local urban children, the PRs (95% CIs) for getting all vaccinated were 0.65 (0.52-0.81), 0.29 (0.22-0.37) and 0.14 (0.09-0.21) among migrant children, non-left-behind children and left-behind children, respectively. The coverage-knowledge-satisfaction network model showed the core node was the satisfaction of vaccination schedule. Non-NIP vaccination was associated with characteristics of both children and caregivers, including age of children (> 2 years-OR: 1.69, 95% CI: 1.07-2.68 for local urban children; 2.67, 1.39-5.13 for migrant children; 3.09, 1.23-7.76 for non-left-behind children); and below caregivers' characteristics: family role (parents: 0.37, 0.14-0.99 for non-left-behind children), age (≤ 35 years: 7.27, 1.39-37.94 for non-left-behind children), sex (female: 0.49, 0.30-0.81 for local urban children; 0.31, 0.15-0.62 for non-left-behind children), physical health (more than average: 1.58, 1.07-2.35 for local urban children) and non-NIP vaccines knowledge (good: 0.45, 0.30-0.68 for local urban children; 7.54, 2.64-21.50 for left-behind children)., Conclusions: There were immunization disparities in non-NIP vaccines among migrant and left-behind families compared with their local counterparts. Non-NIP vaccination promotion strategies, including education on caregivers, and optimization of the immunization information system, should be delivered particularly among left-behind and migrant families., (© 2023. National Institute of Parasitic Diseases.)
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- 2023
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132. Unhealthy Eating Behaviors During Pregnancy and Gestational Weight Gain - Huai'an City, Jiangsu Province, China, 2020-2021.
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Zhang Z, Ding W, Wang H, Cheng Y, Zhang Y, Zhu X, and Xu X
- Abstract
What Is Already Known About This Topic?: Maintaining a healthy diet and appropriate weight during pregnancy is crucial for both the expectant mother and the fetus. Unhealthy eating behaviors (UEBs) such as eating out frequently are becoming increasingly prevalent across the globe. However, there is a dearth of research investigating the relationship between UEBs and gestational weight gain (GWG) specifically in the context of Chinese women., What Is Added by This Report?: The study revealed that a majority of pregnant women reported experiencing one or more UEBs such as eating fast, eating three meals irregularly, eating away from home, and skipping breakfast. A positive association was also observed between the number of UEBs and elevated odds of experiencing excessive GWG., What Are the Implications for Public Health Practice?: The uptake of emerging UEBs is prevalent among pregnant women in China. It is recommended that healthy eating behavior become the focal point of gestational weight management in clinical practice. Moreover, preconception care should take into account customized health education and promotion programs., Competing Interests: The authors declare no conflicts of interest., (Copyright and License information: Editorial Office of CCDCW, Chinese Center for Disease Control and Prevention 2023.)
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- 2023
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133. Nucleus high intensity in the T2-weighted MRI is a potential predictor of annulus tear in cervical injured patients: a case comparative study.
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Wan S, Zhang J, Wu C, Lin X, Li J, Wu F, Zhang Z, and He L
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- Humans, Prospective Studies, Retrospective Studies, Cell Nucleus, Fractures, Bone, Intervertebral Disc Degeneration
- Abstract
Background: Segmental fusion operations assume paramount significance for individuals afflicted by full layers of annulus tears as they avert the perils of rapid disc degeneration and segmental instability. Structures with high signal intensity in the T2-weighted MRI can predict potential damage to the injured segment. Since local structures are shortly related biomechanically, this may be an effective predictor for annulus tears., Methods: A retrospective analysis of the clinical data of 57 patients afflicted by cervical injuries and subjected to single-segment ACDF has been performed in this study. The surgeon performed intraoperative exploration to assess the integration status of the annulus. The signal intensity of the prevertebral space, nucleus, and injured vertebral bodies were judged in the T2-weighted imaging data. Regression analyses identified independent predictors for annulus tears, and the area under the receiver operating characteristic curve (AUC) was computed to evaluate the predictive performance of potential independent predictors., Results: The occurrence of nucleus high intensity was significantly higher among individuals with annulus tears, and the nucleus high intensity was deemed an independent predictor for determining the presence of intraoperative visible annulus tears in patients with cervical injuries. AUC for nucleus high intensity was calculated as 0.717, with a corresponding p-value less than 0.05., Conclusions: In the realm of diagnosing annulus tears in injured cervical patients, nucleus high intensity in the T2-weighted MRI emerges as a promising predictive factor. Notably, this applies specifically to patients devoid of fracture and visible annulus tears in their MRI scans. Such positive outcomes should be regarded as prospective indications for ACDF., (© 2023. The Author(s).)
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- 2023
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134. Spectral optimization of trichromatic white LEDs based on age of lighting user and application scene.
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Han Z, Zhang Z, Liu K, Li Y, Xiao W, Liu J, Zhu X, Zheng C, and Wu Q
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The optimization of trichromatic white light emitting diodes (LEDs) spectrum for application scenes related to the age of lighting users is proposed and demonstrated. Based on the spectral transmissivity of human eyes at different ages, the visual and non-visual responses of human eyes to different wavelengths of light, we have built the blue light hazards (BLH) and circadian action factor (CAF) related to the age of the lighting user. The BLH and CAF are used to evaluate the spectral combinations of high color rendering index (CRI) white LEDs obtained from different radiation flux ratios of red, green, and blue monochrome spectrum. The best spectra of white LEDs for lighting users at different ages in work and leisure scenes are achieved due to the optimization criterion of BLH proposed by us. This research provides a solution for intelligent health lighting design applicable to light users of different ages and application scenes.
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- 2023
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135. Magnetic chitosan/TiO 2 composite for vanadium(v) adsorption simultaneously being transformed to an enhanced natural photocatalyst for the degradation of rhodamine B.
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Zhang J, Wei X, Zhang Z, Yuan C, Huo T, Niu F, Lin X, Liu C, Li H, and Chen Z
- Abstract
A magnetic chitosan/TiO
2 composite material (MCT) was developed. MCT was successfully synthesized by a one-pot method using chitosan, TiO2 , and Fe3 O4 . The absorption equilibrium time of MCT was 40 min in absorbing vanadium(v), the optimal adsorption pH was 4, and the maximum adsorption capacity of vanadium(v) was 117.1 mg g-1 . The spent MCT was applied to photocatalytic reactions for reutilization. The decolorization rates for the degradation of rhodamine B (RhB) by new and spent MCT were 86.4% and 94.3%, respectively. The new and spent MCT exhibited absorption bands at 397 and 455 nm, respectively, which showed that the spent MCT was red-shifted to the cyan light region. These results indicated that the forbidden band widths of the new and spent MCT were about 3.12 and 2.72 eV, respectively. The mechanism of the degradation reaction showed that the hydroxyl radicals as oxidants in the spent MCT mediated the photocatalytic degradation of RhB. In addition, the superoxide anion radical formation of hydroxyl radicals was the main reaction, and the hole generation of hydroxyl radicals was the subordinate reaction. The N -de-ethylated intermediates and organic acids were monitored by MS and HPLC., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)- Published
- 2023
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136. Asparaginase Erwinia chrysanthemi for acute lymphoblastic leukemia and lymphoblastic lymphoma.
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Gao C, Ma X, Zhang Z, Lu Q, Ashby CR Jr, Wei L, and Chen ZS
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- Adolescent, Asparaginase adverse effects, Humans, Antineoplastic Agents adverse effects, Dickeya chrysanthemi, Lymphoma, Non-Hodgkin chemically induced, Lymphoma, Non-Hodgkin drug therapy, Precursor Cell Lymphoblastic Leukemia-Lymphoma drug therapy
- Abstract
Acute lymphoblastic leukemia (ALL) is a neoplastic disease characterized by the malignant proliferation of lymphoid cells in the blood and bone marrow. It accounts for approximately 75% of childhood leukemia. Lymphoblastic lymphoma (LBL) is a type of non-Hodgkin's lymphoma characterized by rapid growth and highly aggressive characteristics that occurs most commonly in adolescents and young adults. Asparaginase is primarily used to treat patients with ALL or LBL. Because allergic reactions occur in patients treated with bacterial-derived asparaginase, it is important to develop an alternative asparaginase preparation for patients allergic to asparaginase. Recombinant asparaginase Erwinia chrysanthemi -rywn (JZP-458) is a recombinant Erwinia asparaginase that uses a novel Pseudomonas fluorescens expression platform in the production process. JZP-458 has the same amino acid sequence as E. chrysanthemi -derived asparaginase (ERW) and its in vitro activity is similar to that of ERW. JZP-458 is highly efficacious in patients allergic to asparaginase. Data from a phase I clinical trial indicated that following the intramuscular or intravenous administration of JZP-458 to volunteers, serum asparaginase activity ≥ 0.1 IU/mL was observed in 100% of the volunteers 72 hours after administration. In this review, we summarize the mechanism of action and the related research data obtained with JZP-458 for the treatment of ALL or LBL., (Copyright 2022 Clarivate.)
- Published
- 2022
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