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Meng J, Bai Z, Huang W, Liu Y, Wang P, Nie S, Huang X. Polysaccharide from white kidney bean can improve hyperglycemia and hyperlipidemia in diabetic rats. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.bcdf.2020.100222] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Han M, You S, Wang Y, Zhang K, Yang S. Synthesis of Highly Thermally Stable Daidzein-Based Main-Chain-Type Benzoxazine Resins. Polymers (Basel) 2019; 11:polym11081341. [PMID: 31412564 PMCID: PMC6723207 DOI: 10.3390/polym11081341] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/07/2019] [Accepted: 08/07/2019] [Indexed: 11/16/2022] Open
Abstract
In recent years, main-chain-type benzoxazine resins have been extensively investigated due to their excellent comprehensive properties for many potential applications. In this work, two new types of main-chain benzoxazine polymers were synthesized from daidzein, aromatic/aliphatic diamine, and paraformaldehyde. Unlike the approaches used synthesizing traditional main-chain-type benzoxazine polymers, the precursors derived from daidzein can undergo a further cross-linking polymerization in addition to the ring-opening polymerization of the oxazine ring. The structures of the new polymers were then studied by 1H nuclear magnetic resonance spectroscopy (NMR) and Fourier-transform infrared spectroscopy (FT-IR), and the molecular weights were determined by using gel permeation chromatography (GPC). We also monitored the polymerization process by differential scanning calorimetry (DSC) and in situ FT-IR. In addition, the thermal stability and flame-retardant properties of the resulting polybenzoxazines were investigated using TGA and microscale combustion calorimeter (MCC). The polybenzoxazines obtained in this study exhibited a very high thermal stability and low flammability, with a Tg value greater than 400 °C, and a heat release capacity (HRC) value lower than 30 J/(g K).
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Affiliation(s)
- Mengchao Han
- Research School of Polymeric Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Sijia You
- Research School of Polymeric Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yuting Wang
- Research School of Polymeric Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Kan Zhang
- Research School of Polymeric Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Shengfu Yang
- Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK
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Wang S, Tamura T, Kyouno N, Liu X, Zhang H, Akiyama Y, Yu Chen J. Effect of the Chemical Composition of Miso (Japanese Fermented Soybean Paste) Upon the Sensory Evaluation. ANAL LETT 2019. [DOI: 10.1080/00032719.2019.1570244] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Shuo Wang
- Department of Biotechnology, Faculty of Bioresource Sciences, Akita Prefectural University, Akita, Japan
| | - Takehiro Tamura
- Akita Prefectural Federation of Miso and Soy Sauce Manufacturers Cooperatives, Akita, Japan
| | - Nobuyuki Kyouno
- Akita Prefectural Federation of Miso and Soy Sauce Manufacturers Cooperatives, Akita, Japan
| | - Xiaofang Liu
- Department of Biotechnology, Faculty of Bioresource Sciences, Akita Prefectural University, Akita, Japan
| | - Han Zhang
- Department of Biotechnology, Faculty of Bioresource Sciences, Akita Prefectural University, Akita, Japan
| | - Yoshinobu Akiyama
- Department of Biotechnology, Faculty of Bioresource Sciences, Akita Prefectural University, Akita, Japan
| | - Jie Yu Chen
- Department of Biotechnology, Faculty of Bioresource Sciences, Akita Prefectural University, Akita, Japan
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Dai J, Teng N, Peng Y, Liu Y, Cao L, Zhu J, Liu X. Biobased Benzoxazine Derived from Daidzein and Furfurylamine: Microwave-Assisted Synthesis and Thermal Properties Investigation. CHEMSUSCHEM 2018; 11:3175-3183. [PMID: 30102450 DOI: 10.1002/cssc.201801404] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 07/21/2018] [Indexed: 06/08/2023]
Abstract
A biobased benzoxazine resin (Dz-f) demonstrating excellent thermal properties was synthesized from daidzein and furfurylamine by using a microwave heating method. The chemical structure of synthesized benzoxazine monomer was identified by FTIR and NMR (1 H and 13 C NMR) before it was cured and its thermal properties evaluated by differential scanning calorimetry (DSC), TGA, and dynamic mechanical analysis (DMA). The cured resin p(Dz-f) exhibited a glass transition temperature (Tg ) of 391 °C, a very high char yield of 68.7 %, and outstanding thermal stability; the Tg value obtained was the highest thermal stability value ever reported for polybenzoxazine with a high biobased content. Moreover, Dz-f demonstrated a satisfying processability, which was rare for the high-performance thermosetting resins. This work provided us with a new strategy for the preparation of high biocontent resins with excellent thermal properties. In addition, the combination of biobased feedstocks with a microwave-assisted heating method as well as the potential application of this approach in high-end fields might perpetuate remarkable progress towards the sustainable development of the polymeric industry.
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Affiliation(s)
- Jinyue Dai
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, P. R. China
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo, Zhejiang, 315201, P. R. China
| | - Na Teng
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yunyan Peng
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yuan Liu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Lijun Cao
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jin Zhu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, P. R. China
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo, Zhejiang, 315201, P. R. China
| | - Xiaoqing Liu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, P. R. China
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo, Zhejiang, 315201, P. R. China
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Intimate estrogen receptor-α/ligand relationships signal biological activity. Toxicology 2018; 408:80-87. [PMID: 30018014 DOI: 10.1016/j.tox.2018.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 06/05/2018] [Accepted: 07/05/2018] [Indexed: 01/31/2023]
Abstract
How does estrogen receptor-α bind its natural ligands - estrogens? How can other molecules mimic estrogens and elicit different estrogenic responses? The answers lie in a complex and intimate chemical biology between ligands and receptor. This delicate interaction at the ligand binding cleft signals, via conformational change, exposure of a specific new charge topography at a second site (Activation Function-2). This, in turn, attracts a regulatory protein which modulates gene expression and controls biological activity.
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