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Commuting satisfaction is an important factor influencing residents' life quality and subjective well-being, and can be used to evaluate the advantages and disadvantages of urban policies and planning. In the past decade, commuting satisfaction has attracted the attention of disciplines in urban planning, geography, and transportation. However, a comprehensive review of the relevant literature is lacking. This paper summaries the methodology for measuring, surveying, and modeling commuting satisfaction. This is followed by a meta-analysis to quantify the effects of socio-economic attributes, commuting characteristics, travel attitudes, built environment, and life events on commuting satisfaction to improve the understanding of commuting satisfaction and its influencing factors and mechanisms. On this basis, it points out the shortcomings and future research directions of commuting satisfaction studies, and presents the implications of existing research findings for policy and planning.(通勤满意度是影响居民生活质量与幸福感的重要因素，一定程度反映了城市相关政策与规划的优劣。近年来，通勤满意度已引起城乡规划、地理、交通等领域的关注。总结了通勤满意度的测量、调查与建模方法，运用元分析方法将社会经济属性、通勤特征、出行态度、建成环境及生活事件对通勤满意度的影响进行了量化处理，以增强对通勤满意度及其影响因素和作用机制的认知。在此基础上，指出了通勤满意度现有研究的不足，提出了研究方向和建议，并阐述了现有研究成果对政策及规划的启示。)

Copyright of World Nuclear Geoscience is the property of World Nuclear Geoscience 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.)

Ghrelin is a newly discovered gastrointestinal peptide that is involved in regulating the body's growth, development and energy balance, and plays a key role in the occurrence and progression of malignant tumors, such as cell proliferation, migration, invasion, apoptosis, inflammatory response and vascular disease. Generate immune cell infiltration and so on. Ghrelin affects the progression of gastric cancer by activating NF-κB/p65 and AMPK and other signaling pathways. Ghrelin not only assist in early screening of gastric cancer, but also function a new marker for predicting the prognosis and survival of gastric cancer patients. Ghrelin and its analogs have clinical application value in the treatment of gastric cancer-related syndromes such as cachexia or sarcopenia. [ABSTRACT FROM AUTHOR]

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum 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 Shanghai Jiao Tong University (1006-2467) is the property of Journal of Shanghai Jiao Tong University 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 Electronic Communication & Computer Science is the property of Omniscient Pte. Ltd. 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 Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Application Research of Computers / Jisuanji Yingyong Yanjiu is the property of Application Research of Computers Edition 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 Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering 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 Journal of Wildland Fire Science is the property of Journal of Wildland Fire Science 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.)

BACKGROUND: Collagen is a biomedical material with good biocompatibility, low toxicity, low immunoactivity, and high cellular affinity. However, the defects such as hydrophilicity and poor thermal stability are the key technical problems that need to be solved urgently in biomedical, tissue engineering, and other applications. OBJECTIVE: To elaborate on the preparation method, characterization, and application progress of acylated collagen. METHODS: PubMed, X-mol, and CNKI databases were used to search the literature on acylated collagen preparation methods, characterization, and application. The search time was from January 1992 to May 2023. The English search terms were “acylated collagen, modified collagen, water-soluble collagen, acetic anhydride”. Chinese search terms were “acylated collagen, modified collagen, water-soluble collagen”. After an initial screening of all articles according to inclusion and exclusion criteria, 53 articles with high relevance were retained for review. RESULTS AND CONCLUSION: (1) The preparation of acylated collagen is mainly obtained by the acylation reaction of acid anhydride, and the reaction sites are mainly ε-amino and N-terminus-amino of collagen, and the reaction environment of acylation reaction needs to be carried out in an alkaline environment. (2) Succinic anhydride is the preferred reactant of acylated collagen. Carbonic anhydride, citric anhydride, and bifunctional modifiers with acylation ability have been excavated in recent years to meet various requirements, but it is still limited to laboratory preparation; complex preparation process is difficult to industrialize, and follow-up research is needed to continuously improve. (3) The characterization methods of acylated collagen are similar to those of collagen, but there is still a lack of standards for the water-soluble characterization of acylated collagen. (4) In recent years, acylated collagen has been gradually used in the preparation of lenses, hydrogels, and dressings, as well as cosmetic raw materials. However, there is still little research on the application of acylated collagen, and there is a lack of complete in vivo experiments to verify the practicality of acylated collagen. [ABSTRACT FROM AUTHOR]

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum 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 Zhejiang University (Science Edition) is the property of Journal of Zhejiang University (Science Edition) 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 Control Theory & Applications / Kongzhi Lilun Yu Yinyong is the property of Editorial Department of Control Theory & Applications 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 Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society 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 Railway Standard Design is the property of Railway Standard Design 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 Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press 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 Natural Gas Industry is the property of Natural Gas Industry Journal Agency 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 Coal Science & Technology (0253-2336) is the property of Coal 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 University Chemistry is the property of Peking University, College of Chemistry & Molecular Engineering 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 Science & Technology of Cereals, Oils & Foods is the property of Science & Technology of Cereals, Oils & Foods 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 Tunnel Construction / Suidao Jianshe (Zhong-Yingwen Ban) is the property of Tunnel Construction 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 Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute 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.)

The secondary structure of proteins is an important basic structure for their biological functions. Studies have shown that the changes of secondary structure in proteins affect their biological reactions to the outside environment and the spectrum of proteins can reflect their secondary structure changes to a certain extent. Silk fibroin widely used in scientific research and social life is an ideal research object. To study the cause and process of secondary structure transformation of silk fibroin we carried out experiments to explore the effect of tannic acid on the secondary structure of silk fibroin through the reaction between different concentrations of tannic acid and silk fibroin. The reaction of tannic acid and silk fibroin was studied by UV-visible absorption spectrum UV-Vis fluorescence emission spectroscopy FL and fourier infrared absorption spectroscopy FTIR showing that the tannic acid and silk fibroin could be chemically bonded. The UV absorption spectra of the reaction solution of 0 - 40 μmol / L tannic acid and 1 mg / mL silk fibroin solution and of the 10 μmol / L tannic acid solution show that the n-Π ∗ displacement of carbon skeleton C O of silk fibroin polypeptide leads to a strong absorption peak at 230 nm whose intensity decreases gradually with the combination of tannic acid hydroxyl group and silk fibroin. The weak absorption peak at 276 nm represents that the Π-Π ∗ and n-Π ∗ transitions of aromatic heterocyclic rings in the silk fibroin molecule are weakened by the binding between tryptophan and tannic acid. The redshifts of the two absorption peaks indicate that the polarity of the microenvironment around tryptophan in silk fibroin is strengthened with the increase of tannic acid concentration in the solution. It is found from the fluorescence emission spectra of the reaction solution of 0 - 40 μmol / L tannic acid and 1 mg / mL silk fibroin and of the 10 μmol / L tannic acid solution that the emission peak intensity of tryptophan residues at 352 nm gradually decreases with the increase of tannic acid concentration. Because of chemical bonding reaction between tannic acid and silk fibroin the polarity of the microenvironment in which silk fibroin is located gradually strengthens with the increase of tannic acid concentration and the hydrophilicity of silk fibroin molecules increases causing the redshift of the emission peak position. According to the infrared spectra of the reaction solution of 0 - 30 μmol / L tannic acid and 1 mg / mL silk fibroin it is found that the absorption peak of tannic acid-silk fibroin reaction system heightens first and then lowers with the increase of tannic acid concentration. Based on the empirical values of different secondary structures in the amide Ⅰ amide Ⅱ and amide Ⅲ regions of the infrared spectra it is inferred that the α helix structure of silk fibroin protein first increases and then decreases with the increase of tannic acid concentration. The random coil structure changes in a similar way but its amplitude is small. We can speculate that 20 μmol / L tannic acid reacts with silk fibroin completely and there is almost no β folding structure in silk fibroin solution indicating that the secondary structure in silk fibroin solution is almost totally transformed. This study shows that tannic acid has significant chemical bonding reaction with silk fibroin. With the increase of tannic acid concentration the polarity of the microenvironment of silk fibroin in the reaction solution gradually strengthens. The binding of silk fibroin polypeptide carbon skeleton and tryptophan residue weakens the UV absorption at 230 nm and 276 nm and the fluorescence emission at 352 nm. When tannic acid concentration increases from 0 μmol / L to 20 μmol / L the α helix and random coil structure gradually increase while the β folding structure gradually decreases. And then with the increase of tannic acid concentration the amount of α helix and random coil structure gradually decreases and that of β fold structure gradually increases. In this experiment tannic acid is used to react with silk fibroin protein in a pioneering way to study the changes of UV) visible absorption spectra fluorescence emission spectra and Fourier infrared absorption spectra of the reaction solution. Innovative conclusions are obtained which have certain reference significance for the future expansion of the study of the structure of silk fibroin protein and the in-depth exploration of tannic acid treated protein. [ABSTRACT FROM AUTHOR]

Copyright of Engineering Management & Technology Discussion is the property of Omniscient Pte. Ltd. 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.)

BACKGROUND: The Achilles tendon is a common site of injury in sports, especially in excessive or improper sports, which is more likely to be affected and difficult to recover after injury. To find a safe, effective, and rapid repair method is always the direction of clinical treatment of Achilles tendon injury, but the effect is not ideal. In recent years, due to the strong repair potential, mesenchymal stem cells have been tried to be used in the treatment of a variety of diseases, and some studies have applied mesenchymal stem cells to repair Achilles tendon injury, with good results. OBJECTIVE: To review the application of mesenchymal stem cells derived from bone marrow, adipose tissue, and tendon in the treatment of Achilles tendon injury, and explore the feasibility and advantages of mesenchymal stem cells in the treatment of Achilles tendon injury, providing a new idea for the treatment of Achilles tendon injury. METHODS: The articles included in CNKI database, Wanfang database, Baidu Academic Database, Web of Science database, PubMed database and Google Academic Database were searched by computer. The Chinese and English search terms were “Achilles tendon, Achilles tendon injury, Achilles tendon rupture, stem cells, mesenchymal stem cells, MSCs, biological materials, tissue engineering”. The screened articles were sorted out and summarized, and those that did not meet the inclusion criteria were excluded. Finally, 101 articles were selected for review. RESULTS AND CONCLUSION: The application of mesenchymal stem cells from different tissues independently or in combination with biomaterials is beneficial for tendon injury repair, but the specific mechanisms involved are not clear, which may include the differentiation of mesenchymal stem cells into tendon cells, regulation of growth factor release and tendon related gene expression. Finding the most suitable seed cells and biomaterials for the treatment of Achilles tendon injury is the key to tissue engineering repair of Achilles tendon. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department 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 Applied Chemical Industry is the property of Shaanxi Research Design Insitute of Petroleum & Chemical Industry 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.)

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Copyright of Advanced Engineering Science / Gongcheng Kexue Yu Jishu is the property of Advanced Engineering Science 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 Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering 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 Agronomica Sinica is the property of Crop Science Society of China 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 Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal 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 Chinese Institute of Food Science & Technology / Zhongguo Shipin Xuebao is the property of Journal of Chinese Institute of Food Science & Technology Periodical 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 Journal of Modern Laboratory Medicine is the property of Journal of Modern Laboratory Medicine Editorial Department 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 Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. 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 Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. 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 Modern Laboratory Medicine is the property of Journal of Modern Laboratory Medicine Editorial Department 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.)