Article
Polymer Science
Weiwei Liu, Shuangkun Zhang, Zhi Luo, Tao Zou, Pingye Deng, Zhanpeng Wu, Haiqiao Wang
Summary: In this work, novel thermoplastic fluorinated polyacrylate films with excellent mechanical performance were prepared by emulsion polymerization using adjustable amphiphilic star macro-RAFT agent as surfactants. The effects of various factors on the surface morphology of the fluorinated polyacrylate films were investigated, and elastomeric films obtained directly from the prepared latexes showed excellent comprehensive properties. The study provides a promising method for the synthesis of high-performance fluorinated polyacrylate films.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Jia Liu, Jian Li, Chen Yi Wang, Qiang Ren
Summary: The hydrophobicity of block copolymer macro-RAFT agents plays a crucial role in the controllability of RAFT surfactant-free cationic emulsion polymerization, with higher hydrophobicity leading to faster polymerization. The location of the active trithiocarbonate group in micelle is also a key factor affecting polymerization controllability.
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
(2021)
Article
Polymer Science
Matthew F. I. Rix, Kyle Collins, Samuel J. Higgs, Eleanor M. Dodd, Simon J. Coles, Nathaniel M. Bingham, Peter J. Roth
Summary: This study demonstrates the various reactions of thionolactone DBT and its ability to introduce a degradable backbone. Additionally, through XRD structure analysis and DFT modeling, the higher reactivity of DBT is explained by its stabilization of the intermediate radical, increased ring strain, and better reinitiating efficiency.
Article
Chemistry, Analytical
Fatemeh Aghaziyarati Farahani, Esmaeel Alipour, Reza Mohammadi, Mohammad Sadegh Amini-Fazl, Khalil Abnous
Summary: The study outlined the method of improving the sensitivity of biomarker detection by optimizing electrochemical signals and successfully developed an aptasensor for detecting trace amounts of myoglobin.
Correction
Polymer Science
Thiago R. Guimaraes, Y. Loong Bong, Steven W. Thompson, Graeme Moad, Sebastien Perrier, Per B. Zetterlund
Summary: The study investigates the effect of Z-group on the nucleation step in polymerization-induced self-assembly via RAFT in emulsion, providing valuable insights for this process.
Article
Polymer Science
Jia Liu, Zhengchun Cai, Yongxin Ji
Summary: The synthesis of bio-based modified amphoteric epoxy modified acrylate sizing emulsion was achieved by reversible addition fragmentation chain transfer (RAFT) polymerization, and its application in paper sizing was investigated. Monomers were polymerized to obtain cationic sizing emulsion by acid neutralization and anionic sizing emulsion by alkali neutralization. The effects of bio-based monomer content, hydrophilic monomer content, and degree of quaternization on the properties of sizing emulsion and paper were studied. The addition of bio-based monomers was found to enhance the sizing performance of paper.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Sung-Po R. Chen, Valentin A. Bobrin, Zhongfan Jia, Michael J. Monteiro
Summary: In this study, we demonstrate a simple and effective solvent-free method to prepare anisotropic polymer nanoparticles directly in water by controlling polymer mobility through tuning its glass transition temperature (T-g). The morphology of the particles can be transformed from spherical to tadpole-like structures by cooling above the T-g, and can be reversed by heating above the T-g, showing a triggered and on-demand structural reorganization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Keran Li, Jing Li, Qin Zhang, Hui Dai
Summary: Poly(2-(dimethylaminoethyl methacrylate)-b-(glycidyl methacrylate)-b-(acrylic acid)) blocks were grafted to Fe3O4 surface to obtain four-responsive nanocomposite particles (P(DMAEMA-b-GMA-b-AA)/Fe3O4) with V-shaped surface structure. The structure and properties were characterized by FT-IR, TEM, and TGA. The stability of the Pickering emulsion was investigated under different factors, and the nanoparticles exhibited environmentally friendly behavior and could be recycled through magnetic force. The developed nanoparticles have great potential in oily wastewater treatment, oil transfer, and crude oil delivery systems design.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Quentin Tevenot, Seiichi Kawahara
Summary: In this study, ATRP-ARGET was used to graft polymerization of styrene onto natural rubber in the latex stage as a heterogeneous system. The particles were characterized by H-1 NMR spectroscopy and SEC, confirming the success of graft copolymerization. The resulting grafted polystyrene exhibited living radical behavior, showing a linear evolution of molecular weight versus monomer conversion and a high grafting efficiency with a narrow molecular weight distribution.
Article
Polymer Science
Junpeng Cao, Yingxin Tan, Ying Chen, Li Zhang, Jianbo Tan
Summary: This study explores how the reactive end group of macro-RAFT agent affects RAFT-induced emulsion polymerization for the first time. Different end groups were found to influence the morphologies of block copolymer nano-objects and the polymerization process. The use of asymmetric difunctional macro-RAFT agent allows for functionalization of the nano-objects.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Polymer Science
Koji Takagi, Hiroto Murakata, Tomoki Hasegawa
Summary: This study investigated the cationic polymerization of isobutyl vinyl ether (IBVE) using Schreiner's thiourea (STU) combined with Im-TEPB. The polymerization of IBVE resulted in low number-averaged molecular weight and broad molecular weight distribution. On the other hand, fast cationic polymerization of p-methoxystyrene (pMOS) using STU/Im-TEPB yielded high molecular weight and narrow molecular weight distribution. The coordination of a trifluoromethanesulfonate counteranion with STU decreased the polymerization activity. The polymerization kinetics showed that the monomer consumption rate depended on the concentration of Im-TEPB.
Article
Polymer Science
Koji Takagi, Hiroto Murakata, Tomoki Hasegawa
Summary: In this study, cationic polymerization of isobutyl vinyl ether (IBVE) was investigated using Schreiner's thiourea (STU) combined with Im-TEPB cocatalysts. The results show that STU/Im-TEPB displayed higher activity and better control over the molecular weight compared to other systems studied.
Article
Materials Science, Multidisciplinary
Puja Das Karmakar, Aniruddha Pal, Subhadip Bodhak, Sagar Pal
Summary: The study synthesized nanocomposites consisting of magneto-responsive gamma-Fe2O3 NPs and copolymers, with a regular core-shell morphology where the magnetic NPs act as the core and the copolymer as the shell. This developed nanocarrier has been found to be highly efficient in carrying a hydrophobic drug (naproxen).
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Polymer Science
Katharina Nieswandt, Prokopios Georgopanos, Martin Held, Evgeni Sperling, Volker Abetz
Summary: Thermoresponsive copolymers were synthesized and their thermoresponsive properties were characterized. The copolymers showed a lower critical solution temperature in water, which depended on the molar fraction of one of the monomers. Block copolymers were also prepared using a surfactant-free emulsion polymerization method, and their thermoresponsive behavior in a confined state was investigated. The nanospheres showed a linear change in hydrodynamic radius with temperature, and the addition of certain salt anions affected the collapse of the nanospheres' corona.
Article
Polymer Science
Tina Hsia, Jing Wan, Bo Fan, San H. Thang
Summary: The development of a new bifunctional reversible addition-fragmentation chain transfer (RAFT) agent allows for the synthesis of polymers with predetermined molecular weights and low dispersibilities, while also providing functionalities at both polymer termini that allow strong binding to graphene oxide (GO). By controlling the bifunctional RAFT agent, acrylonitrile-styrene-acrylate (ASA) copolymers with different types of acrylates have been synthesized, enabling access to polymers with diverse thermal and mechanical properties. The strong binding between GO and the synthesized polymers has been verified, leading to the preparation of polymer/GO composites with varied tensile strengths and conductivity properties similar to semiconductors.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Food Science & Technology
Fei Yu, Cong Chen, Shuna Chen, Kaixi Wang, Haitao Huang, Yuanyuan Wu, Puming He, Youying Tu, Bo Li
Summary: During the processing of black tea, the content of organic acids shows different trends in withering and rolling stages, which are regulated by various enzymes. This study provides insights into the dynamic changes and regulatory mechanisms of organic acids in black tea production.
Article
Biochemistry & Molecular Biology
Kaixi Wang, Jiafan Wu, Shuna Chen, Hangye Zhao, Puming He, Youying Tu, Bo Li
Summary: Theaflavins (TFs), characteristic components of black tea, have potential anti-diabetic activity by improving pancreatic function, intestinal tight junctions, and mitochondrial biogenesis.
Article
Food Science & Technology
Hyunuk Kang, Hui Zhou, Yushan Ye, Jiangfan Yang, Zhonghua Liu, Puming He, Bo Li, Yuanyuan Wu, Yaomin Wang, Youying Tu
Summary: Tieguanyin tea extracts have positive effects on the cognitive ability and neuroprotection of APP/PS1 mice by alleviating inflammation and improving antioxidant capacity.
Article
Biochemistry & Molecular Biology
Cong Chen, Huanqing Zhu, Jiaxin Kang, Hasitha Kalhari Warusawitharana, Shuna Chen, Kaixi Wang, Fei Yu, Yuanyuan Wu, Puming He, Youying Tu, Bo Li
Summary: This study provides a comprehensive understanding of saponin biosynthesis and accumulation in tea plants, identifying key enzymes and transcription factors involved in saponin biosynthesis through analysis of tea flower and seed samples. The mevalonate pathway, along with HMGS, MVD, IDI enzymes, were found to be responsible for saponin accumulation, highlighting the potential regulatory role of ten transcription factors in tea plant saponin biosynthesis.
Article
Biochemistry & Molecular Biology
Youying Tu, Hyunuk Kang, Eunhye Kim, Jiangfan Yang, Puming He, Yuanyuan Wu, Bo Li, Xiaobo Liu, Junsheng Liu
Summary: The study found that Tieguanyin tea extracts could alter fecal metabolites in AD mice, with Tgy-C being the most effective. Metabolomics analysis showed Tgy-C's reduction effect on fecal metabolites in AD mice, which may involve pathways like protein digestion and absorption, and amino acid biosynthesis.
Article
Environmental Sciences
Ang Li, Bo Li, Bin Lu, Dong Yang, Suxia Hou, Xiaolong Song
Summary: The generation estimation of retired mobile phones in China is calculated based on sales data and subscriber numbers. The study also analyzes the mass and material characteristics of retired mobile phones, and proposes policy implications for improving the sustainable management system.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Applied
Cong Chen, Fei Yu, Xinli Wen, Shuna Chen, Kaixi Wang, Feiquan Wang, Jianming Zhang, Yuanyuan Wu, Puming He, Youying Tu, Bo Li
Summary: This study reveals the formation and mechanisms of (E)-2-hexenal during tea processing, and identifies the role of CsHI in this process. Additionally, it shows that abiotic stresses can regulate the proportions of (Z)-3-hexenal and (E)-2-hexenal in torn tea leaves by modulating CsHI expression levels. The findings of this study are important for the development of tea flavor and plant defense against abiotic stresses.
Editorial Material
Ecology
Ming Nie, Wenwen Liu, Steven C. Pennings, Bo Li
Article
Nutrition & Dietetics
Huanqing Zhu, Kaixi Wang, Shuna Chen, Jiaxin Kang, Na Guo, Hongbo Chen, Junsheng Liu, Yuanyuan Wu, Puming He, Youying Tu, Bo Li
Summary: Tea seed saponins can stimulate GIP expression via SGLT1 and TGR5, and have potential effects on improving metabolism and related diseases.
Review
Biochemistry & Molecular Biology
Shuna Chen, Jiaxin Kang, Huanqing Zhu, Kaixi Wang, Ziyi Han, Leyu Wang, Junsheng Liu, Yuanyuan Wu, Puming He, Youying Tu, Bo Li
Summary: L-theanine is the main amino acid in tea leaves and has both flavor and health benefits. Its immunomodulatory effects, particularly on reducing immunosuppression and improving immunity, have been studied in clinical and epidemiological research. Numerous studies on cells and animals have also shown that theanine plays a role in regulating inflammation, nerve damage, the intestinal tract, and tumors by regulating certain cellular functions.
Review
Biochemistry & Molecular Biology
Hongbo Chen, Fei Yu, Jiaxin Kang, Qiao Li, Hasitha Kalhari Warusawitharana, Bo Li
Summary: The composition and contents of organic acids vary in different types of tea. They play important roles in the metabolism of tea plants, nutrient absorption and growth regulation, as well as the aroma and taste quality of tea. However, the research on organic acids in tea is still limited. This article reviewed the progress made in studying organic acids in tea, including analysis methods, physiological functions, composition and influencing factors, sensory contributions, as well as health benefits like antioxidation and digestion promotion. It aims to provide references for further research on organic acids in tea.
Article
Plant Sciences
Yuanfei Pan, Mu Liu, Alejandro Sosa, Bo Li, Mang Shi, Xiaoyun Pan
Summary: This study investigates the metacommunities of endophytic fungi in the leaves of an invasive plant and finds that the structure of these fungal communities is influenced by multiple spatial scales and different drivers. These findings are important for understanding the global patterns of fungal diversity.
Article
Computer Science, Interdisciplinary Applications
Xian Song, Bo Li, Pengyu Wang, Yizhao Zhou, Jian Wang, Yaqun Wang, Chengbing Fang, Meiyuan Jin
Summary: This article fabricated a flexible piezoelectric sensor to gather data for the pulse-taking procedure and used it to recognize whether a woman is pregnant. The pulse signal was processed by GoogleNet and achieved a 90.48% correction rate, which solidified the objectivity of pulse diagnosis and raised the digitalization level of TCM.
ENGINEERING REPORTS
(2023)
Article
Remote Sensing
Xi Zhang, Xiangming Xiao, Xinxin Wang, Xiao Xu, Shiyun Qiu, Lianghao Pan, Jun Ma, Ruiting Ju, Jihua Wu, Bo Li
Summary: Biological invasions, especially by Spartina alterniflora, are significantly impacting the structure and functions of coastal ecosystems in China. Urgent efforts to control the spread of this invasive species are hindered by the lack of time-series data. By using satellite images, this study successfully generated annual maps of Spartina saltmarshes from 1985 to 2020, revealing a continuous expansion of Spartina along the coast. The invasion history and frequency of changes were found to be influenced by latitude, with low latitudes experiencing longer and more frequent invasions. Human interventions have contributed to the decline in certain areas, but natural spread remains the primary driver of its extensive invasion.
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2023)
Article
Instruments & Instrumentation
W. Liu, Z. Zhang, J. Wu, T. Ma, Y. Zhang, Y. M. Hu, Y. Q. Zhang, Y. Y. Huang, H. X. Jiang, X. K. Jiang, D. Y. Chen
Summary: This article focuses on the pre-launch characterization of the HXI spectrometer, including detection efficiency, energy resolution, and energy to ADC channel relationship. The characterization results show that the HXI spectrometer meets the performance requirements and is capable of performing on-orbit observation activities.
JOURNAL OF INSTRUMENTATION
(2022)
