As an emerging city with a long cultural history in Hebei Province, Hengshui is constantly deepening its efforts in promoting its urban image. This paper explores and classifies the regional culture of Hengshui, and designs a series of posters based on its long history and distinctive regional characteristics. This poster design not only expresses the cultural heritage contained within the city, but also reflects the emerging regional characteristics of modern Hengshui. It comprehensively interprets and reconstructs Hengshui education, regional famous figures, Hengshui landmark buildings, and local characteristic culture. With the help of the poster design, it showcases a constantly developing and innovative charming city, promoting the new era of Hengshui style. Let more people have a deeper understanding of today's Hengshui and make efforts to promote regional economic development and improve economic efficiency in Hengshui.

This paper aims to explore the use of "Internet+" technology to flip the traditional classroom teaching model in order to better enhance students’learning outcomes in the fields of medical microbiology and immunology. Through research and practice, it has been found that the flipped classroom approach can stimulate students’ interest in learning, enhance their ability for self-directed learning, and promote deep learning. This paper will combine specific cases with the latest research findings to propose more concrete teaching strategies and suggestions, and discuss how to effectively evaluate the application effects of the flipped classroom in the teaching of medical microbiology and immunology. The goal is to provide reference and inspiration for educational reform.

Currently, traditional civil engineering has matured, and the integration of information technology and civil engineering can generate new breakthroughs. Intelligent construction is the product of the combination of the two. Compared to traditional civil engineering, intelligent construction is more environmentally friendly, safe, and cost-effective in terms of construction, and is more in line with the needs of development. Based on this, this article combines relevant policies in recent years to analyze the current development status and path advantages of intelligent construction, providing reference for more people to understand and value intelligent construction.

Background: Exosomes derived from plant embryo cells have emerged as key players in mediating stress responses in plants. This study investigates the functional roles of exosomes from Arabidopsis thaliana embryo cells in enhancing plant tolerance to drought and salinity stress. Understanding these roles could lead to innovative applications in agriculture for improving crop resilience.

Methods: Exosomes were isolated from Arabidopsis thaliana embryo cells using ultracentrifugation. The characterization of exosome cargo included proteomic and lipidomic analyses to identify key molecules involved in stress responses. Plant stress tolerance was assessed through exosome treatment under controlled conditions of drought and salinity. Parameters such as relative water content (RWC), chlorophyll content, and expression levels of stress-responsive genes (DREB1A, RD29A) were measured to evaluate the effectiveness of the treatment.

Results: Exosome treatment significantly improved plant tolerance to drought and salinity, evidenced by increased RWC and chlorophyll levels compared to untreated controls. Molecular analysis revealed that exosomes contained bioactive molecules, including small RNAs and stress-related proteins, which were associated with the upregulation of stress-responsive genes. The findings suggest that exosomes enhance stress tolerance by delivering regulatory molecules that activate stress response pathways.

Conclusions: The study highlights the potential of exosomes derived from plant embryo cells to improve plant resilience against environmental stressors. The integration of exosome-based technologies in agriculture could provide a sustainable approach to enhancing crop performance under adverse conditions. Future research should focus on optimizing exosome production and assessing their efficacy in field settings to fully leverage their benefits in agricultural practices.