Article
Polymer Science
Yi Wang, Francesca Lorandi, Marco Fantin, Krzysztof Matyjaszewski
Summary: Polymerizations in aqueous dispersed media benefit from good heat transfer, low viscosity, low content of volatile compounds, and established industrial use. The implementation of ATRP in dispersed media has highlighted the possibility of achieving improved livingness and producing a variety of macromolecular architectures. ATRP techniques employing low-ppm catalyst loadings have enabled access to a larger variety of polymer architectures and functional polymer particles, which have found applications in molecular recognition, drug delivery, bio-quantification, and advanced coatings.
Article
Materials Science, Paper & Wood
Muhammad Asif Iqbal, Toheed Akhter, Muhammad Faheem, Asif Mahmood, Waheed Al-Masry, Sohail Nadeem, Sadaf Ul Hassan, Chan Ho Park
Summary: We synthesized a thermoresponsive polymer with a narrow molecular weight distribution using organic photo-redox-catalyzed atom transfer radical polymerization (O-ATRP). The O-ATRP was mediated by a photoredox catalyst 1,2,3,5-tetrakis (carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) under visible light irradiation. The polymerization of polymethyl methacrylate (PMMA) chains from a hydroxypropyl cellulose (HPC)-based macroinitiator was characterized using various analytical methods. The resulting PMMA-grafted HPC (PMMA-g-HPC) showed a widened lower critical solution temperature (LCST) window and an inverse pH dependency of the LCST, making it promising for various applications including drug delivery systems.
Review
Polymer Science
Alfred K. K. Fung, Michelle L. Coote
Summary: Atom transfer radical polymerization has become one of the most dominant methods in controlled radical polymerization since its invention 25 years ago. The rise in importance is largely due to increases in scope, reduced catalyst loading, and improved oxygen tolerance. These developments have been underpinned by an improved understanding of the mechanism, kinetics, and structure-reactivity trends.
POLYMER INTERNATIONAL
(2021)
Article
Chemistry, Physical
Olessya P. Loiko, Johan P. A. Heuts, Alex M. van Herk
Summary: This article reports the synthesis of polymer-vesicle latex particles using extruded vesicles of DODAB via an atom transfer radical polymerization-based approach. Cryo-TEM characterization reveals that the final morphology of the particles is affected by monomer feed composition and chain length. Protrusions or nanocapsules were synthesized depending on the monomer combinations used.
COLLOID AND POLYMER SCIENCE
(2022)
Article
Polymer Science
Aurel Diacon, Edina Rusen, Florica Rizea, Adi Ghebaur, Daniela Berger, Raluca Somoghi, Andreea Matei, Petru Palade, Oana Tutunaru
Summary: The study developed an ATRP process for MMA polymerization using Fe(CO)(5) as co-initiator, demonstrating controlled characteristics and producing magnetic PMMA particles. The particles have porous characteristics and magnetic properties, making them suitable for use as catalyst supports, separation processes, or biomedical applications.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Engineering, Chemical
Hui Ye, Yining Zhou, Guodong Yang, Tengfei Yu, Yuzhong Zhang, Lizhi Zhao, Qingping Xin, Shurui Han
Summary: In this study, a pH-responsive membrane was developed for protein fractionation. The membrane successfully separated different milk proteins by controlling the pH value.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Polymer Science
Jui-Teng Lin, Jacques Lalevee, Hsia-Wei Liu
Summary: This article presents the kinetics and general features of a photopolymerization system for the first time, based on a proposed mechanism. Analytic formulas were developed to explore new features, including the relationship between free radical photopolymerization efficacy and nanogold production, and the competing procedures of nanogold production and photopolymerization efficacy. The efficacy of photopolymerization is contributed by components from the excited state of copper complex, while nanogold production is contributed by the coupling of components with gold ion.
Article
Polymer Science
Collin N. Britten, Kristen Lason, Keisha B. Walters
Summary: In this study, Cu-0-mediated ATRP in aqueous media was successfully extended to the synthesis of tertiary amine-pendant methacrylate polymers with well-defined molecular weight distributions (MWDs). The reaction system showed remarkable tolerance to dissolved oxygen and active end groups were effectively retained, allowing for the synthesis of these polymers in a rapid and convenient manner.
Article
Engineering, Chemical
Ki Jung Kim, Yunmi Chae, Seong Jin An, Jin Hui Jo, Sungmin Park, Won Seok Chi
Summary: This study investigates microphase-separated structured PI-POEM graft copolymer membranes, which have controllable POEM concentrations and the ability to modify material properties. The results show that PI-POEM graft copolymer membranes exhibit high CO2 affinity and separation performance, making them promising for CO2 separation processes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Polymer Science
Daniel A. Corbin, Blaine G. McCarthy, Zach van de Lindt, Garret M. Miyake
Summary: This study focused on synthesizing radical cations of photoredox catalysts for organocatalyzed ATRP to investigate deactivation mechanisms. The results showed that increasing radical cation concentrations improved polymerization control in O-ATRP.
Article
Polymer Science
Prithwiraj Mandal, Pierre Marcasuzaa, Laurent Billon
Summary: A block copolymer consisting of polystyrene and polypentafluorostyrene was synthesized and its nano-structure was controlled through a click reaction.
Article
Chemistry, Multidisciplinary
Yu Wang, Sushant P. Sahu, Alec J. Clay, Amanda J. Gildersleeve
Summary: By combining nitroxide radicals and ATRP active halogens into a functional reagent, simultaneous ATRP-NRC relay polymerization was successfully achieved, allowing for tailored macromolecular architecture and functionality by using different functional reagents.
CHEMICAL COMMUNICATIONS
(2021)
Article
Engineering, Chemical
Joseph J. Andry, Jaenic J. Lee, Jessica Wu, Katherine Xia, Eric S. Tillman
Summary: The study aims to find universal reaction conditions for different polymers to achieve high extents of coupling. By adjusting the choice of radical traps, high extents of coupling were successfully achieved for PSBr, PMABr, and PMMABr.
Article
Chemistry, Multidisciplinary
Honghong Gong, Yipin Cheng, Ying Zhang, Jie Xiong, Zhicheng Zhang
Summary: A novel fluorescence sensor based on a polymer has been developed for the detection of copper ions in the organic phase, showing rapid response time, excellent selectivity, and efficient quantitative analysis. This work provides a fast and convenient method for visually detecting Cu2+ in the organic phase.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Polymer Science
Martin Cvek, Arman Moini Jazani, Julian Sobieski, Thaiskang Jamatia, Krzysztof Matyjaszewski
Summary: ZnO nanocrystals were successfully synthesized and used as a heterogeneous co-catalyst in mechano- and photoATRP. The photoATRP with ZnO exhibited faster reaction kinetics compared to mechanoATRP and did not require excess ligand. This study demonstrated the versatility and robustness of ZnO-cocatalyzed photoATRP for various monomers.
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
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.
Letter
Multidisciplinary Sciences
Xinxin Wang, Xiangming Xiao, Qiang He, Xi Zhang, Jihua Wu, Bo Li
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)
