基于“智慧树+腾讯课堂”的人体解剖学线上教学实践与思考

结合临床“5+3”一体化学生特点和课程内容，在解剖学理论教学中运用智慧树与腾讯课堂构建了“课前—课中—课后”高效、精准、互动的线上翻转智慧课堂。将ARCS[注意力（atention）、相关性（relevance）、自信心（confidence）、满足感（satisfaction）]动机模型引入教学设计中，助力翻转课堂的有效进行。课前通过智慧树发布教学资源，学生进行自主学习；课中应用腾讯课堂直播教学，针对性地讲解重难点内容，答疑讨论；课后应用智慧树发布习题测试与作业。实践表明，该模式的线上教学受到了学生的广泛认可；有助于培养学生学习兴趣，提高其自主学习能力和分析问题、解决问题的能力；有助于实施多元化形成性考核；为疫情之后开展混合式教学奠定了基础。     

早期声门型喉癌累及前连合的处理及预后

早期声门型喉癌治疗方法主要包括放射治疗、经口微创手术及开放性手术等。本文通过复习相关研究资料,对累及前连合的声门型喉癌的各种治疗方法及预后做一综述。     

食品中非法添加和滥用化学染料的分析研究

建立了食品中碱性黄、碱性嫩黄、碱性橙II、酸性橙II、罗丹明B、对位红、苏丹类1-4号11种有机染料的高效液相色谱分析方法。在0.2-10μg/mL的浓度范围内线性相关系数良好,相关系数范围为0.9996-0.9999,检测限0.05μg/mL。该方法涉及的化学试剂少,操作简便,结果准确。对阳性样品进一步采用液质联用技术确证。     

The niche of hepatic cancer stem cell and cancer recurrence

Currently, surgical resection is one of only a few options for treating hepatocellular carcinoma (HCC). Unfortunately, postoperative tumor recurrence remains almost inevitable despite additional radiation or chemotherapy treatment following radical resection. Clinical observations and a growing body of experimental evidence have led to speculation that there is a population of persistent hepatic cancer stem cells (HCSCs), which are difficult to completely remove surgically. HCSCs are most often in a quiescent state and thought to reside in a specific microenvironment known as a niche that provides the cues necessary for HCSCs to maintain a balance of self-renewal and differentiation. Residual HCSCs following surgery may alter their fate by invading into the blood circulation. Furthermore, it remains to be determined if hepatectomy render the postoperative niche more favorable for the survival and growth of HCSCs, and therefore the recurrence of HCC. A better understanding of the mechanisms for HCSCs self-renewal, invasion and recurrence may provide new insights into curative strategies for treating HCC.     

Dysfunctional autophagy in Alzheimer’s disease: pathogenic roles and therapeutic implications

Neuronal autophagy is essential for neuronal survival and the maintenance of neuronal homeostasis. Increasing evidence has implicated autophagic dysfunction in the pathogenesis of Alzheimer’s disease (AD). The mechanisms underlying autophagic failure in AD involve several steps, from autophagosome formation to degradation. The effect of modulating autophagy is context-dependent. Stimulation of autophagy is not always beneficial. During the implementation of therapies that modulate autophagy, the nature of the autophagic defect, the timing of intervention, and the optimal level and duration of modulation should be fully considered.     

Transforming Pt-SnO2 Nanoparticles into Pt-SnO2 Composite Nanoceramics for Room-Temperature Hydrogen-Sensing Applications

Many low-dimensional nanostructured metal oxides (MOXs) with impressive room-temperature gas-sensing characteristics have been synthesized, yet transforming them into relatively robust bulk materials has been quite neglected. Pt-decorated SnO₂ nanoparticles with 0.25–2.5 wt% Pt were prepared, and highly attractive room-temperature hydrogen-sensing characteristics were observed for them all through pressing them into pellets. Some pressed pellets were further sintered over a wide temperature range of 600–1200 °C. Though the room-temperature hydrogen-sensing characteristics were greatly degraded in many samples after sintering, those samples with 0.25 wt% Pt and sintered at 800 °C exhibited impressive room-temperature hydrogen-sensing characteristics comparable to those of their counterparts of as-pressed pellets. The variation of room-temperature hydrogen-sensing characteristics among the samples was explained by the facts that the connectivity between SnO₂ grains increases with increasing sintering temperature, and Pt promotes oxidation of SnO₂ at high temperatures. These results clearly demonstrate that some low-dimensional MOX nanocrystals can be successfully transformed into bulk MOXs with improved robustness and comparable room-temperature gas-sensing characteristics.     

Cutaneous Innervation and Itch in Keloids

Abstract is missing (Letter).