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Visible-light catalysis technology of Ag/g-C3N4 (silver/graphite carbon nitride) was applied to the removal of sulfadiazine in wastewater. The degradation effect of Ag/g-C3N4 on sulfadiazine and water quality factors, degradation mechanismi, intermediate products and its degradation effect on sulfadiazine in actual water were investigated. The results showed that Ag/g-C3N4 with a mass fraction of 5% could effectively degrade sulfadiazine under visible-light irradiation, with a removal rate of up to 98.3%, and the degradation process conformed to the pseudo-first-order kinetic model; the pH and alkalinity of the solution Ag/g-C3N4 had little effect on the degradation of sulfadiazine, but the presence of humic acid in the solution inhibited the degradation of sulfadiazine; durng the degradation of sulfadiazine, •O2- and photogenerated holes were the main activities species ; the degradation process mainly produced 4 kinds of intermediate products, which were 2-aminopyrimidine, p-aminobenzenesulfonic acid, hydroxylated sulfadiazine, and nitrated sulfadiazine. When the Songhua River water and the secondaz effluent of domestic sewage were used as the water quality background, the removal rates of Ag/g-C3N4 for sulfadiazine were 95.4% and 77.5%, respectively. [ABSTRACT FROM AUTHOR]

Visible-light catalysis technology of Ag/g-C3N4 (silver/graphite carbon nitride) was applied to the removal of sulfadiazine in wastewater. The degradation effect of Ag/g-C3N4 on sulfadiazine and water quality factors, degradation mechanismi, intermediate products and its degradation effect on sulfadiazine in actual water were investigated. The results showed that Ag/g-C3N4 with a mass fraction of 5% could effectively degrade sulfadiazine under visible-light irradiation, with a removal rate of up to 98.3%, and the degradation process conformed to the pseudo-first-order kinetic model; the pH and alkalinity of the solution Ag/g-C3N4 had little effect on the degradation of sulfadiazine, but the presence of humic acid in the solution inhibited the degradation of sulfadiazine; durng the degradation of sulfadiazine, •O2- and photogenerated holes were the main activities species ; the degradation process mainly produced 4 kinds of intermediate products, which were 2-aminopyrimidine, p-aminobenzenesulfonic acid, hydroxylated sulfadiazine, and nitrated sulfadiazine. When the Songhua River water and the secondaz effluent of domestic sewage were used as the water quality background, the removal rates of Ag/g-C3N4 for sulfadiazine were 95.4% and 77.5%, respectively. [ABSTRACT FROM AUTHOR]

This study aims to explore and refine the teaching aspects of a flipped classroom approach for biological reaction engineering. The study encompasses three iterations of teaching practice, focusing on key elements such as theme content selection, implementation process, evaluation and effectiveness. By integrating relevant industry and societal topics with course's professional knowledge, students are encouraged to independently collect data, analyze and discuss findings, and present their work in group. Comprehensive literacy of students is assessed through discussion reports, defense reports, utilization of new tools, and team cooperation. Analysis of student performance reveals that the design and implementation of the flipped classroom approach significantly enhances student motivation to learn, improves scores, and supports the achievement of course objectives. Therefore, the methodology presented in this study may serve as a reference for implementing teaching reforms in core courses in applied undergraduate colleges, thereby fostering well-round individuals with strong theoretical foundation, innovative analytical skills, and excellent teamwork abilities.

According to the teaching philosophy of the outcome-based education, this study elaborates the development of a practical innovation course for biological engineering major after five runs of teaching practice and continuous improvement. It mainly includes the methods for selection of teaching subjects, implementation of teaching process, process assessment, evaluation and improvement. Based on the performance and achievements of three grades of students majored in bioengineering, we found that the logic and methods of the practical innovation course could greatly stimulate the motivation of students for learning, as well as their scores. Therefore, the logic and methods described in this study may serve as a reference for the reforms of practical training courses of engineering major under the background of Engineering Education Certification.

Accurately understanding the features and connotations of complex engineering problems is an important prerequisite for setting graduation requirements, constructing curriculum and designing teaching contents. By discussing the characteristics of complex engineering problems in the biological industry, this paper explored the demands for undergraduates in Yangtze river delta region, summarized the typical jobs and their requirements, and expounded the connotation of complex engineering problems contained in various typical tasks. On this basis, a gradual curriculum system was constructed, which included multiple stages of conceiving, formation and application, to cultivate the ability to solve complex engineering problems in the major of bioengineering. The curriculum coordinated the implementation of deep integration of industry and education, research feed back course construction, course team and advanced courses building up, professional associations covered all crews and students, supporting the ability training of solving complex engineering problems.

Objective: To explore the reasons for platform-switching abutment fracture, the treatment and prevention methods., Methods: Between March 2009 and December 2014, all of the fractured platform-switching abutments were evaluated. The fracture rate of platform-switching abutments was calculated and the gender, age, implant site, implant size, abutment size, prosthetic type, loading time and crown materials were analyzed., Results: A total of 2 487 platform-switching implants were placed during this period and 6 abutments were fractured. The fracture rate was 0.24% (6/2 487). All of the 6 fractured abutments were placed in molar region. All occlusal planes were made of metal material. Five patients were male. All the fracture abutments could not be removed and the implants had to be removed and reimplanted., Conclusions: Without special abutment removing instruments, it is difficult to remove the fractured platform-switching abutment. In molar region, platform-switching implant system should be carefully used. Increasing implants number and splinting crowns with porcelain occlusal planes might reduce the abutment fracture risk.

Co-culturing Bacillus megaterium and Ketogulonigenium vulgare is widely applied to 2-keto-gulonic acid production. For optimizing the process, numerous researchers studied on the symbiotic molecular mechanism of the co-culture process. The research was promoted greatly owing to omics technologies, bioinformatics, high throughput technologies and physiology. Recently, the proteomic, metabolomic, comparative genomics and transcriptomics were performed to the research. These omics data provided us the interaction network of the artificial ecosystem in multilevel. Combining with the physiological validation based on the high throughput method, we can elucidate the molecular mechanism in detail, which will facilitate us to develop strategies for metabolic engineering. The paper reviewed the recent developments of symbiotic molecular mechanism research in this co-culture process and its applications. In addition, we proposed the future research needs.