Root Canal Shaping Using Nickel Titanium,M-Wire,and Gold Wire: A Micro–computed Tomographic Comparative Study of One Shape,ProTaper Next,and WaveOne Gold Instruments in Maxillary First Molars

Introduction

The aim of this study was to evaluate the root canal shaping effect of instruments manufactured from nickel titanium, M-Wire, and Gold wire with different glide path preparation techniques.

在生物化学教学中培养医学生的科研创新能力

在教学过程中潜移默化培养医学生的科研创新能力，是实践新时代医学教育改革新理念的有益探索。生物化学是医学生的重要专业基础课程之一，探讨在生物化学教学过程中通过多种教学方法培养学生对科研的兴趣，同时，结合科研新进展，开拓学生的视野，培养学生的创新思维，提高医学生科研创新能力的思路。     

Identification and functional analysis of ferritin 2 from the Taiga tick Ixodes persulcatus Schulze

Ferritin 2 (FER2) is an iron storage protein, which has been shown to be critical for iron homeostasis during blood feeding and reproduction in ticks and is therefore suitable as a component for anti-tick vaccines. In this study, we identified the FER2 of Ixodes persulcatus, a major vector for zoonotic diseases such as Lyme borreliosis and tick-borne relapsing fever in Japan, and investigated its functions. Ixodes persulcatus-derived ferritin 2 (Ip-FER2) showed concentration-dependent iron-binding ability and high amino acid conservation, consistent with FER2s of other tick species. Vaccines containing the recombinant Ip-FER2 elicited a significant reduction of the engorgement weight of adult I. persulcatus. Interestingly, the reduction of engorgement weight was also observed in Ixodes ovatus, a sympatric species of I. persulcatus. In silico analyses of FER2 sequences of I. persulcatus and other ticks showed a greater similarity with I. scapularis and I. ricinus and lesser similarity with Hyalomma anatolicum, Haemaphysalis longicornis, Rhipicephalus microplus, and R. appendiculatus. Moreover, it was observed that the tick FER2 sequences possess conserved regions within the primary structures, and in silico epitope mapping analysis revealed that antigenic regions were also conserved, particularly among Ixodes spp ticks. In conclusion, the data support further protective tick vaccination applications using the Ip-FER2 antigens identified herein.     

急诊住院医师的教学查房模式

教学查房是床旁教学的一种重要手段,对住院医师进行教学查房能够有效提高住院医师的岗位胜任力和职业能力,培养急诊住院医师的急诊临床思维。近年来由于国家住院医师规范化培训改革在不断深入,对急诊住院医师的教学查房引起了人们的高度关注,然后在实际的急诊住院医师的教学查房中却还存在着诸多问题,教学查房与日常的临床查房概念混淆、教学查房准备不充分、教学查房目的不明确以及教学查房的互动性不强都严重影响了教学查房的质量。因此需要积极探究急诊住院医师的教学查房的有效模式,从而不断提升住院医师的临床实践能力。     

案例教学法在消化内科见习课的应用效果评价

目的探讨案例教学法在消化内科见习课的教学效果和体会。方法选取2017年10月—2017年12月在消化内科进行见习课的2015级39-40班护理本科学生44例(全部为女生),抓阄分成对照组(22人)和试验组(22人),对照组给予传统的带教方法,试验组给予案例教学法教学,比较两组护生在理论、技能、综合能力和对带教满意度方面有无差异。两组学生在性别、年龄、专业前的课程成绩比较,差异无统计学意义(均P>0.05)。结果观察组在理论考核成绩、操作考核成绩、教学满意度等方面均高于对照组。结论案例教学法能提高护理教学的教学效果,增加学生的理论、操作能力,提高护理临床思维能力,提升学生的学习主动性和积极性。     

易筋经与核心稳定性训练的比较分析

对易筋经与核心稳定性训练的锻炼方式及作用效果的研究进行比较分析。从两者的训练状态及对形体、呼吸、意识的调节方式入手,并结合其在增强肌力、提高平衡力、预防运动损伤方面所起的共同疗效进行深入思考,探讨易筋经锻炼可能对人体核心稳定性的影响,为进一步研究易筋经的作用机制提供理论依据。     

A comparison of the relationships between psychosocial factors,occupational strain,and work ability among 4 ethnic teacher groups in China

The present study compared the level of occupational strain and work ability among Han, Hui, Uygur, Hui, and Kazakh teachers, and explored ethnic differences based on the associations of psychosocial factors at work, occupational strain, and work ability. A cross-sectional survey was conducted among 2,941 teachers in primary and secondary schools in Xinjiang Province, China. Psychosocial factors, occupational strain, and work ability were measured using the Occupation Stress Inventory—Revised Edition (OSI-R) and Work Ability Index. Han and Hui teachers experienced reduced work ability compared with Uygur and Kazakh teachers, and this finding was caused, in part, by exposure to psychosocial factors at work. The vocational and psychological strains caused by these factors play an important role in reduced work ability among all ethnic teacher groups. The findings indicate the importance of taking action to reduce occupational strain for promoting teachers' work ability in multiethnic workplaces.