食品中天然多酚是具有强效抗氧化特性的植物代谢物,可预防氧化应激引起的各种慢性疾病,越来越受到人们的青睐。本文通过对与食品相关的天然多酚文献数据进行分析,挖掘食品和天然多酚的研究热点和未来研究方向。通过使用CiteSpace V5.8.R...食品中天然多酚是具有强效抗氧化特性的植物代谢物,可预防氧化应激引起的各种慢性疾病,越来越受到人们的青睐。本文通过对与食品相关的天然多酚文献数据进行分析,挖掘食品和天然多酚的研究热点和未来研究方向。通过使用CiteSpace V5.8.R3、VOSviewer 1.6.15和Note Express 3.6.0.9178对中国知网和美国国家生物技术信息中心PubMed数据库中与食品相关的天然多酚研究文献进行分布特征分析。结果显示,全球范围内的食品和天然多酚的文献数量持续增加;轻工业/手工业学科发表的文献占全部中文文献的73.18%,相关文献发表最多的期刊是食品工业科技(中国)和Journal of Agricultural and Food Chemistry(美国),发文量处于世界领先地位的国家为中国,主要的研究机构为西南大学(中国)和Indian Institute of Technology(印度),作者励建荣和Shela Gorinstein具有较高的发文量和中心地位。单篇被引频次中文最高为173次,英文最高为2269次。高频关键词突现表明未来的热点将聚集在多酚提取纯化的工艺优化和体外消化以及植物提取研究方面。食品和天然多酚的研究前景广阔,本文可为从事与食品相关的天然多酚研究学者提供数据参考。展开更多
Microcapsule self-healing technology is one of the effective methods to solve the durability problem of cementbased composites.The evaluation method of the self-healing efficiency of microcapsule self-healing cement-b...Microcapsule self-healing technology is one of the effective methods to solve the durability problem of cementbased composites.The evaluation method of the self-healing efficiency of microcapsule self-healing cement-based composites is one of the difficulties that limits the self-healing technology.This paper attempts to characterize the self-healing efficiency of microcapsule self-healing cement-based composites by acoustic emission(AE)parameters,which provides a reference for the evaluation of microcapsule self-healing technology.Firstly,a kind of self-healing microcapsules were prepared,and the microcapsules were added into the cement-based composites to prepare the compression samples.Then,the specimen with certain pre damage was obtained by compression test.Secondly,the damaged samples were divided into two groups.One group was directly used for compression tests to obtain the damage failure process.The other group was put into water for healing for 30 days,and then compression tests were carried out to study the influence of self-healing on the compression failure process.During the experiments,the AE signals were collected and the AE characteristics were extracted for the evaluation of self-healing efficiency.The results show that the compression pre damage test can trigger the microcapsule,and the compression strength of the self-healing sample is improved.The failure mechanism of microcapsule selfhealing cement-based composites can be revealed by the AE parameters during compression,and the self-healing efficiency can be quantitatively characterized by AE hits.The research results of this paper provide experimental reference and technical support for the mechanical property test and healing efficiency evaluation of microcapsule self-healing cement-based composites.展开更多
文摘食品中天然多酚是具有强效抗氧化特性的植物代谢物,可预防氧化应激引起的各种慢性疾病,越来越受到人们的青睐。本文通过对与食品相关的天然多酚文献数据进行分析,挖掘食品和天然多酚的研究热点和未来研究方向。通过使用CiteSpace V5.8.R3、VOSviewer 1.6.15和Note Express 3.6.0.9178对中国知网和美国国家生物技术信息中心PubMed数据库中与食品相关的天然多酚研究文献进行分布特征分析。结果显示,全球范围内的食品和天然多酚的文献数量持续增加;轻工业/手工业学科发表的文献占全部中文文献的73.18%,相关文献发表最多的期刊是食品工业科技(中国)和Journal of Agricultural and Food Chemistry(美国),发文量处于世界领先地位的国家为中国,主要的研究机构为西南大学(中国)和Indian Institute of Technology(印度),作者励建荣和Shela Gorinstein具有较高的发文量和中心地位。单篇被引频次中文最高为173次,英文最高为2269次。高频关键词突现表明未来的热点将聚集在多酚提取纯化的工艺优化和体外消化以及植物提取研究方面。食品和天然多酚的研究前景广阔,本文可为从事与食品相关的天然多酚研究学者提供数据参考。
基金support provided by the National Natural Science Foundation of China(Grant No.11872025)and the Six Talent Peaks Project in Jiangsu Province(Grant No.2019-KTHY-059).
文摘Microcapsule self-healing technology is one of the effective methods to solve the durability problem of cementbased composites.The evaluation method of the self-healing efficiency of microcapsule self-healing cement-based composites is one of the difficulties that limits the self-healing technology.This paper attempts to characterize the self-healing efficiency of microcapsule self-healing cement-based composites by acoustic emission(AE)parameters,which provides a reference for the evaluation of microcapsule self-healing technology.Firstly,a kind of self-healing microcapsules were prepared,and the microcapsules were added into the cement-based composites to prepare the compression samples.Then,the specimen with certain pre damage was obtained by compression test.Secondly,the damaged samples were divided into two groups.One group was directly used for compression tests to obtain the damage failure process.The other group was put into water for healing for 30 days,and then compression tests were carried out to study the influence of self-healing on the compression failure process.During the experiments,the AE signals were collected and the AE characteristics were extracted for the evaluation of self-healing efficiency.The results show that the compression pre damage test can trigger the microcapsule,and the compression strength of the self-healing sample is improved.The failure mechanism of microcapsule selfhealing cement-based composites can be revealed by the AE parameters during compression,and the self-healing efficiency can be quantitatively characterized by AE hits.The research results of this paper provide experimental reference and technical support for the mechanical property test and healing efficiency evaluation of microcapsule self-healing cement-based composites.