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This paper summarized the management of clinical teaching for nursing students in the Department of Cardiothoracic Surgery under the COVID-19 epidemic. By revising a teaching plan for nursing students, new teaching methods such as Wechat platform-based lecture, questionnaire survey, online Conference by Tencent APP were adopted. Course lectures focused on the COVID-19 prevention, common diseases in the Department of Cardiothoracic Surgery, common types of surgery and postoperative nursing. Multiple approaches were provided to improve the nursing students’ awareness on cardiothoracic diseases and key issues of postoperative nursing, and improve the quality of clinical teaching. (总结新型冠状病毒肺炎疫情下心胸外科实习护士临床带教管理策略。通过修订实习护士的培训内容, 新增企业微信授课、调查问卷、腾讯会议等教学方法, 重点讲解新型冠状病毒肺炎疫情下防护知识、心胸外科常见疾病、常见手术方式及术后护理, 提高实习护士对心胸外科疾病的认识, 帮助掌握术后护理常规, 关注实习护士的心理状况, 提升护理教学质量。)

CoTe2 as a high-performance anode material for potassium ion batteries still faces a lot of challenges that hinder its electrochemical performance, including poor intrinsic electronic conductivity, slow reaction kinetics, and significant volume changes during charging and discharging processes. To address these issues, one-dimensional CoTe2 nanorods were synthesized using a one-step hydrothermal method and then coated with a carbon layer to form CoTe2@C nanocomposites. The resulting composite exhibited a significant interaction between CoTe2 and the carbon layer, resulting in the formation of a stable heterostructure. This interaction not only improved the electrical conductivity of the composites but also facilitated the migration of electrons and K+ ions. When used as the anode for potassium ion batteries, the CoTe2@C anode demonstrated enhanced electrochemical performance. At a current density of 0.5 A g−1, the CoTe2@C anode exhibited a reversible capacity of 100.3 mA h g−1 after 1000 cycles. Even at a higher current density of 1.0 A g−1, it maintained a high reversible capacity of 72.5 mA h g−1 after 3000 cycles. Furthermore, it displayed excellent rate capability, with an average reversible capacity of 98.0 mA h g−1 at a high rate of 5.0 A g−1, showing a potential application capability for potassium ion batteries. [ABSTRACT FROM AUTHOR]

Benzoxazine resin shows great potential as matrix for high performance composites, possessing good processabilty, dielectric property, mechanical property, and thermal properties, but its further application is limited by low crosslinking density and poor curing activity, especially for mono‐cyclic benzoxazines. In this work, melamine, a tertiary amine with a stable triazine structure, was introduced into the aldehyde‐containing mono‐cyclic benzoxazine, in order to achieve higher crosslinking density, higher curing activity, and better thermal properties. The chemical structure of prepolymers was verified by Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance (1H NMR) spectra, the curing behavior was investigated by differential scanning calorimetry, the thermal properties of polymers were studied by thermogravimetric analysis (TGA) and thermal mechanical analysis (TMA). It was found that the introduction of trifunctional melamine (MA) could lower curing temperature and promote the curing degree. Additionally, a proper amount of MA could increase the crosslinking density and thermal properties of the resultant polybenzoxazine. For example, poly(BZ‐3MA) showed the highest thermal stability with the temperature at 5% weight loss (Td5) of 415°C, carbon residue (Yc) of 67.7%, 23°C, and 2.9% higher than those of poly(BZ). Moreover, the glass transition temperature of poly(BZ‐5MA) reached 204.06°C, 36.51°C higher than that of poly(BZ). [ABSTRACT FROM AUTHOR]