Comparison of Haptic and Biometric Properties,Bacterial Load,and Student Perception of Fixative Solutions: Formaldehyde Versus Chilean Conservative Fixative Solution with and without Formaldehyde in Pig Kidneys     

Marianne Skopnik-Chicago  Katherine Poblete-Cordero  Natali Zamora  Roberto Bastías  Pablo A. Lizana 《Anatomical sciences education》2021,14(6):836-846

One of the most widely used solutions to fix and preserve organic tissues is formaldehyde, despite reservations regarding its toxicity and the fact that formaldehyde-embalmed bodies lose their original characteristics. Anatomy laboratories have been replacing formaldehyde with solutions that retain the characteristics of fresh tissue. For this purpose, alternative solutions with a very low concentration of formaldehyde or without any formaldehyde have been analyzed. The objective of this study was to compare biometry, coloration, haptic properties, and bacterial load on animal specimens (pig kidneys) embalmed with formaldehyde, and with Chilean Conservative Fixative Solution with and without formaldehyde (formaldehyde chCFS and formaldehyde-free chCFS). Also, the perception of health and biological science students toward specimens treated with different solutions was assessed. The results indicated that there were no significant differences in specimens’ retraction, or bacterial load. Students showed a preference for organs embalmed in formaldehyde chCFS and formaldehyde-free chCFS; indicating that with these treatments they could better visualize structures and that the prosections had greater flexibility and the colors were more similar to those of fresh tissue. Additionally, students recommended the material embalmed in formaldehyde chCFS and formaldehyde-free chCFS for anatomy learning. In contrast, students indicated that formaldehyde-fixation negatively affected their practical experience. In conclusion, embalming with formaldehyde chCFS or formaldehyde-free chCFS provides an advantageous practical experience over the use of formaldehyde and may be an alternative to replace the use of formaldehyde in anatomy laboratories.  相似文献   

1982 FIFA World Cup: from Spain’s struggle for democratic legitimacy to Italy’s rediscovery of football nationalism     

Juan Antonio Simón 《Soccer & Society》2019,20(7-8):948-959

ABSTRACT

One of the most memorable moments in the World Cups history is Marco Tardelli’s second goal in Italy’s win over Germany in the 1982 World Cup finals. Better known as Tardelli’s scream, it is thus a perfect object to analyse in order to understand football’s deeper social meanings and its political and cultural undertones, in this case both for the World Cup champions, Italy, and for the host country, Spain. In the Spanish case, organizing the World Cup was a huge political opportunity for the just restored democracy to showcase to the world a modern and pluralistic society leaving behind the authoritarian and outdated dictatorship. As for Italy, their first World Cup winning since World War II was heavily politically used by actors across the political spectrum. Such nationalistic approach constituted a novelty after decades of a low profile national discourse.  相似文献   

大学生孤独感对手机成瘾倾向的影响:生命意义感的调节作用     

陆娟  宫火良 《保定学院学报》2020,(3):95-100

为了探究大学生孤独感、手机成瘾倾向和生命意义感之间的关系,采用UCLA孤独量表、大学生手机成瘾倾向量表、人生意义感问卷,选取408名大学生作为被试进行问卷调查。结果发现:(1)孤独感与手机成瘾倾向呈显著性正相关,生命意义感与手机成瘾倾向呈显著性负相关,孤独感和生命意义感相关性不显著;(2)孤独感和生命意义感都显著预测手机成瘾倾向,生命意义感在孤独感和手机成瘾倾向之间的调节效应显著,低生命意义感大学生的孤独感对手机成瘾倾向的预测力更强。因此,大学生的孤独感能正向预测手机成瘾倾向,生命意义感能调节二者之间的关系,低水平的生命意义感会加剧孤独感对手机成瘾倾向的预测作用,而高水平的生命意义感会使孤独感对手机成瘾倾向的影响较小。  相似文献   

Validity and reliability of a low-cost dynamometer to assess maximal isometric strength of upper limb     

Natalia Romero-Franco  Juan C Fernández-Domínguez  Juan A Montaño-Munuera  Javier Romero-Franco  Pedro Jiménez-Reyes 《Journal of sports sciences》2019,37(15):1787-1793

Muscle imbalance and deficit are key parameters for guiding rehabilitation and sports sessions and avoiding injuries. However, the high cost and non-portable nature of most instruments employed for muscle strength assessment frequently hamper an affordable evaluation in field conditions. This study evaluated the validity and reliability of a low-cost digital dynamometer to assess the maximal isometric strength of upper limb muscles. Fourteen physically active volunteers performed the main movements of the upper limb at maximal isometric strength: flexion-extension, internal-external rotation and abduction-adduction of the shoulder; and flexion-extension of both elbow and wrist. Validity was examined by comparing the strength values from the low-cost digital dynamometer and those measured by an isokinetic dynamometer, assumed as the gold standard. The correlation between both devices was perfect (r > 0.913), while Bland-Altman plots showed absolute agreement between both devices, the maximum range of the values of bias was ?0.99–1.00 N in wrist extension. Inter-tester and intra-tester reliability were excellent for all movements (ICC ≥ 0.855). The low-cost digital dynamometer showed strong validity and excellent reliability in assessing maximal isometric strength during the main movements of the upper limb. Professionals may use it for an affordable isometric muscle strength assessment in field situations.  相似文献   

洞口■溪瑶族民居的艺术特色     

何娟 《邵阳学院学报(社会科学版)》2011,10(6):104-107

湖南洞口■溪瑶族民居融合了当地的民俗和自然的生态环境,形成了自己特有的建筑艺术特色,并具备其独特的艺术性。文章从造型结构、材质、民俗文化等三个方面并结合当地文化生活和风俗习惯简要阐明了其独具一格的艺术特色。  相似文献   

馆际互借在ALEPH中的应用实践   总被引：1，自引：0，他引：1  

田辛玲  王娟 《中国现代教育装备》2011,(3):151-153

本文给出了馆际互借的概念,阐述了馆际互借的应用原理,并详细介绍了在本馆图书管理系统ALEPH500中馆际互借的解决方案。  相似文献   

从解释世界到改变世界——论马克思对康德实践观的超越     

刘玲  陈娟 《巢湖学院学报》2011,13(1):14-17

马克思在对德国古典哲学的基本命题—主客关系问题进行批判继承的基础上提出了以实践活动为出发点的"实践唯物主义哲学"。马克思的实践唯物主义哲学与作为德国古典哲学源头的康德的实践哲学在实践主体、实践客体、实践的主客体关系及实践的目的等四个方面有着内在的联系和区别,其区别之处正是马克思实践观对康德实践观的超越之处。  相似文献   

小剂量雷公藤多甙治疗子宫肌瘤疗效观察   总被引：2，自引：0，他引：2  

傅文君  倪娟  郑丽君  王贤芳 《河北北方学院学报(医学版)》2005,22(1):46-48

目的:观察小剂量雷公藤多甙(GTW)治疗子宫肌瘤的临床疗效及副作用.方法:随机将124例患者分为两组,对照组62例,治疗组62例.治疗组服用雷公藤多甙40mg/d,疗程3～6个月,对照组服用米非司酮25mg/d,疗程3个月.治疗前后均用B超测量子宫及其肌瘤大小,用放射免疫法(RIA)测血清雌二醇(E2)、孕酮(P)、促卵泡素(FSH)、促黄体生成素(LH)水平.结果:两组治疗后3～4个月、5～6个月子宫及肌瘤体积与治疗前比较均明显缩小,差异均有显著性(P＜0.05,P＜0 01).而且缩小呈时间依赖关系.治疗后3个月,治疗组E2、P较治疗前显著下降,FSH、LH水平较治疗前升高,差异均有显著性(P＜0.01),上述性激素水平在停药后1～3个月内均恢复正常.服药期间治疗组3.2%、对照组74.19%有不同程度的胃肠道反应及更年期症状.结论:小剂量雷公藤多甙治疗子宫肌瘤的临床疗效明显,副作用少.  相似文献   

Towards Covid-19 Literacy     

Archila  Pablo Antonio  Danies  Giovanna  Molina  Jorge  Truscott de Mejía  Anne-Marie  Restrepo  Silvia 《Science & Education》2021,30(4):785-808

Covid-19 literacy, induced by the coronavirus disease (2019), is characterized as the understanding of Covid-19 as well as informed decisions based upon this understanding. This type of literacy is closely related to health literacy, scientific literacy, and scientific media literacy. It may be obvious to say that Covid-19 literacy is a key factor for governments to effectively manage the Covid-19 transition. However, lack of literature exists about Covid-19 literacy among university students. Therefore, the current study aimed to determine the Covid-19 literacy level among 4168 students from a Colombian university. The data were derived from students’ responses to a 25–item anonymous online self-reporting questionnaire. We found that 21–25-year age group, graduate students,?students enrolled prior to 2015, and medical students had a significantly higher mean score. Moreover, the Internet (86.8%) was the most popular source of information from which participants gained most information regarding Covid-19. Furthermore, 58.5% of the participants considered health workers as a source that can provide accurate information. Most importantly, the findings reveal the students’ knowledge about (1) the role of an eventual process of vaccination, (2) the test currently used as diagnostic for Covid-19, and (3) the fatality rate, three aspects of Covid-19 literacy that deserve more attention. The findings provide a useful basis for the formulation of policies and concrete actions in improving Covid-19 literacy.

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交流情境对学前儿童叙事表现的影响     

王娟  谢晗 《电化教育研究》2021,42(3):75-80

电话和视频等媒介下的交流方式与面对面的交流具有不同的特征.研究在面对面、电话和视频三种交流情境下诱发大班和小班儿童的故事叙事,考察交流情境对学前儿童叙事表现的影响.研究发现:(1)在叙事语境化上,非面对面交流情境表现出显著优势;(2)在心理状态术语上,电话交流情境对小班幼儿有明显的促进作用,而视频交流情境对大班幼儿有明显的促进作用;(3)在叙事结构上,电话交流情境能显著促进小班幼儿的总词汇量和平均句长的表现,而面对面的交流情境能显著促进大班幼儿叙事总词汇量的表现.研究表明,非面对面交流情境对提高儿童的叙事表现有独特的优势,教育者要适当利用或创设远距离交流情境的机会促进儿童对叙事语境变化的敏感性,提高叙事质量.  相似文献