氯化银沉淀提取金属银方法探讨

利用碳酸盐与氯化银在高温下作用生成碳酸银 ,碳酸银分解得到金属银 ,从而提取回收含银废液中的金属银 .     

谈声乐教学中声音技巧与情感表达的关系

声乐技巧与情感表达是声乐教学中不可缺少的两个因素,二者要有机结合起来,这也是唱好一首歌的关键所在.因此,学习声乐的目的是用正确的发声技巧和有情感的内涵来表达声乐作品.     

氮化银结构特性的第一性原理研究

用第一性原理研究了氮化银的几种可能的结构。发现反ReO3结构的Ag3N、闪锌矿结构的AgN和萤石结构的AgN2满足力学稳定性的要求,并且给出了其结构特性。     

Reconsidering the Character and Role of Inquiry in School Science: Analysis of a Conference

We summarize a conference on scientific inquiry bringing together science educators, cognitive scientists and philosophers of science with three goals:

The influence of water depth on kinematic and spatiotemporal gait parameters during aquatic treadmill walking

The purpose of this study was to investigate kinematic and spatiotemporal variables of aquatic treadmill walking at three different water depths. A total of 15 healthy individuals completed three two-minute walking trials at three different water depths. The aquatic treadmill walking was conducted at waist-depth, chest-depth and neck-depth, while a customised 3-D underwater motion analysis system captured their walking. Each participant’s self-selected walking speed at the waist level was used as a reference speed, which was applied to the remaining two test conditions. A repeated measures ANOVA showed statistically significant differences among the three walking conditions in stride length, cadence, peak hip extension, hip range of motion (ROM), peak ankle plantar flexion and ankle ROM (All p values < 0.05). The participants walked with increased stride length and decreased cadence during neck level as compared to waist and chest level. They also showed increased ankle ROM and decreased hip ROM as the water depth rose from waist and chest to the neck level. However, our study found no significant difference between waist and chest level water in all variables. Hydrodynamics, such as buoyancy and drag force, in response to changes in water depths, can affect gait patterns during aquatic treadmill walking.     

冷热环境变化对人体生理机能的影响

对7名男游泳运动员和7名非游泳运动员在桑拿浴和冷水浴时生理和内分泌参数指标进行了测试。实验结果显示：两组人员的生理和荷尔蒙反应都很明显；非游泳运动员浸冷水5min和10min时，心率有明显提高；两组人员的血浆淋巴管紧缩素的高血压蛋白酶在桑拿后有明显提高，而冷水浴后却下降。非游泳运动员在桑拿、冷水浴后，自然免疫细胞比例下降比较明显。两组人员实验后心率、体温和血压都升高，但游泳运动员对冷热环境的适应能力远高于非游泳运动员。     

Qualitative Outcomes of a Homestay Immersion With Critical Reflection

The authors explore the impact of a 3‐week homestay cultural immersion on 10 counselor trainees by analyzing their 210 structured journals using consensual qualitative research. Findings suggest that establishing meaningful relationships and engaging in critical reflection are central to increasing multicultural awareness. Implications for multicultural counseling training and research are provided.     

Learner subjects in study abroad: discourse of immersion,hierarchy of experience and their subversion through situated learning

This article investigates different kinds of learner subjects that study-abroad programs produce. It is based on discourse analysis and ethnographic fieldwork in May–September 2011, involving three students from a US college studying abroad short term in Europe. The discourse of immersion in study abroad valorizes a learning-by-doing, individual, reflective learner subject who learns alone by gaining everyday experience outside the classroom and by reflecting on it. Some students subverted this discourse and became group and classroom-based learner subjects; nonetheless, they all became reflective learner subjects. This article proposes critical analysis of the discourse and links that reflectivity to critical pedagogy.     

青海湟中鲁沙尔银铜器手工艺浅谈

作为青藏高原视觉造型艺术中重要一类的湟中鲁沙尔银铜器手工艺艺术,在佛教艺术和民族生活艺术中占据重要的位置,其以宗教为中心的器物造型,受佛教文化的洗礼,渗透着藏传佛教思想,加之艺人的精心打造,使得民族手工艺保持了艺术的纯粹性,民族情感和文化审美也因之得以升华。     

唐志怪小说“银变”型故事中的变形母题研究

在唐志怪小说中,有很多以银变为母题建构的故事,银变几乎是故事的核心情节,这种母题在故事中相对稳定而凸显,本文对银变的模式和观念做一文化解析,认为金银变形母题的模式是受到了汉译佛经的影响,而金银变化的观念则来自＂物老成精＂信仰。