Search

The "reliance on tea" among ethnic minorities in Tibet and other border regions is tightly linked to tea's health and healing properties. This tradition, established since the Tang Dynasty, served as a means for the central dynasties to exert influence over various tribes using "tea" and has been a key driver behind the enduring tea-horse trade. On one hand, "tea" had been shaped by the upper classes into an indispensable item and a cultural symbol representing a refined lifestyle, due to its unique material and spiritual connotations, which inspired admiration and imitation among the general populace. This allowed the authorities to seize upon tea as an opportunity to implement their political and economic control in a more subtle and moderate manner, to some extent, mitigating the potential for harsh conflicts that might arise from more direct forms of domination, and promoting interaction and development among diverse ethnic groups and regions. On the other hand, the everyday needs and experiences of ordinary people led them to adapt and expand the role of tea in their lives, further deepening the cultural and spiritual dimensions of tea culture. [ABSTRACT FROM AUTHOR]

The use of antibacterial packaging materials is an effective way to delay fruit rotting and spoilage, thereby minimizing economic losses and health hazards. Natural antibacterial agents, especially essential oils, are often selected as antibacterial components in antibacterial packaging materials, due to their excellent antibacterial properties. However, their low water solubility, poor stability, and easy volatility result in materials containing them having poor mechanical properties and short antibacterial efficacy time. Therefore, in this work, the citral loaded Pickering emulsion was prepared using chitosan and self-made carboxymethyl glucan self-assembled nanoparticles as emulsifier. Then, composite films with good transparency, excellent mechanical properties and long-term antibacterial properties for fruits packaging were prepared from chitosan (CS), carboxymethyl-glucan(CMG), poly(vinyl alcohol)(PVA), and Pickering emulsion(PE)by solvent casting strategy. Pickering emulsion has a protective effect on citral, which not only improves the compatibility of citral in composite film substrate, but also extends the antibacterial time of packaging materials. In this experiment, the transparency of the antibacterial composite film containing Pickering emulsion(CS-CMG-PVA-PE1)was 84%, the tensile strength was 32 MPa, and the elongation at break was 130%. More importantly, the composite polymer solution can be dipped directly on fruits as a coating for food storage to improve food shelf life, substantially expanding its ease of use and scope of use. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Active packaging can prolong the shelf life of food by releasing functional additive. Polyvinyl alcohol （PVA） has attracted extensive interest for its excellent performance. However, there are some problems such as too strong hydrophilicity and low mechanical properties that limit its application in active packaging. Based on the performance requirements of packaging materials, PVA-CC obtained by cross-linking PVA and cellulose nanofiber (CNF) with citric acid （CA), and eugenol （EUG) as a typical antibacterial agent is loaded in PVA-CC polymer network, and then the composite film PVA-CCE is obtained. It has demonstrated that PVA-CCE shows great mechanical properties, water resistance, thermal stability and antibacterial properties. The swelling ratio of the composite film with CA cross-linking could be reduced from 495. 74% to 72. 00%, exhibiting excellent water resistance. Compared to the PVA film, the melting temperature of PVA-CCE is reduced by 11 ℃, and the decomposition temperature is increased by 20 ℃, which indicates that the processing performance of PVA is obviously improved after covalent cross-linking. Additionally, there are free CA in the polymer network to play a plasticizing role for improving comprehensive properties. Moreover, free CA could play a synergistic role with EUG to improve antibacterial properties of PVA-CCE. These results suggest that the prepared PVA-CCE film has an extensive application prospect in active packaging. [ABSTRACT FROM AUTHOR]

Copyright of Electric Drive is the property of Electric Drive Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Scientiarum Naturalium Universitatis Sunyatseni / Zhongshan Daxue Xuebao is the property of Sun-Yat-Sen University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin University of Science & Technology is the property of Journal of Harbin University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)